/* Student Toolkit — Redesign 2026 */

:root,
html[data-theme="light"] {
    --brand-500: #4f46e5;
    --brand-600: #4338ca;
    --brand-700: #3730a3;
    --bg-base: #f8fafc;
    --text-primary: #0f172a;
    --text-muted: #64748b;
    --surface-glass: rgba(255, 255, 255, 0.72);
    --border-glass: rgba(0, 0, 0, 0.06);
    --header-bg: rgba(255, 255, 255, 0.85);
    --shadow-card: 0 4px 24px rgba(15, 23, 42, 0.06);
    --shadow-glow: 0 0 25px -5px rgba(79, 70, 229, 0.2);
    --color-success: #16a34a;
    --color-error: #dc2626;
    --color-warning: #d97706;
    --color-info: #2563eb;
    --input-bg: #ffffff;
    --input-border: #e2e8f0;
    --glow-1: rgba(79, 70, 229, 0.08);
    --glow-2: rgba(217, 70, 239, 0.06);
    --glow-3: rgba(6, 182, 212, 0.05);
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --layout-max: 1280px;
    --layout-gutter: clamp(1rem, 4vw, 2rem);
}

html[data-theme="dark"] {
    --bg-base: #020617;
    --text-primary: #f1f5f9;
    --text-muted: #94a3b8;
    --surface-glass: rgba(255, 255, 255, 0.03);
    --border-glass: rgba(255, 255, 255, 0.06);
    --header-bg: rgba(2, 6, 23, 0.75);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
    --shadow-glow: 0 0 25px -5px rgba(79, 70, 229, 0.35);
    --input-bg: rgba(255, 255, 255, 0.04);
    --input-border: rgba(255, 255, 255, 0.1);
    --glow-1: rgba(79, 70, 229, 0.12);
    --glow-2: rgba(217, 70, 239, 0.1);
    --glow-3: rgba(6, 182, 212, 0.05);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body.app-body {
    margin: 0;
    min-height: 100vh;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

::selection {
    background: var(--brand-500);
    color: #fff;
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 4px;
    opacity: 0.5;
}

.container {
    width: 100%;
    max-width: var(--layout-max);
    margin-inline: auto;
    padding-inline: var(--layout-gutter);
}

/* Background glow */
.bg-glow {
    position: fixed;
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
    filter: blur(120px);
}

.bg-glow-1 {
    top: -10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: var(--glow-1);
}

.bg-glow-2 {
    bottom: 20%;
    right: -10%;
    width: 45vw;
    height: 45vw;
    background: var(--glow-2);
}

.bg-glow-3 {
    top: 40%;
    left: 30%;
    width: 35vw;
    height: 35vw;
    background: var(--glow-3);
    filter: blur(100px);
}

/* Header */
.app-header {
    position: sticky;
    top: 0;
    z-index: 40;
    background: var(--header-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-glass);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 64px;
    gap: var(--spacing-md);
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: inherit;
}

.brand-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    background: linear-gradient(135deg, var(--brand-500), #7c3aed);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
    transition: transform 0.2s;
}

.brand:hover .brand-icon {
    transform: scale(1.05);
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-title {
    font-weight: 700;
    font-size: 1.15rem;
    letter-spacing: -0.02em;
    background: linear-gradient(90deg, var(--text-primary), var(--brand-500));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.brand-tagline {
    font-size: 0.625rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    font-weight: 500;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.health-badge {
    display: none;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.85rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid rgba(16, 185, 129, 0.25);
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
}

@media (min-width: 768px) {
    .health-badge {
        display: flex;
    }
}

.health-badge.is-offline {
    border-color: rgba(239, 68, 68, 0.25);
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

.health-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
    position: relative;
}

.health-badge:not(.is-offline) .health-dot::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: currentColor;
    animation: ping 1.5s cubic-bezier(0, 0, 0.2, 1) infinite;
    opacity: 0.6;
}

@keyframes ping {
    75%, 100% {
        transform: scale(2);
        opacity: 0;
    }
}

.icon-btn {
    width: 42px;
    height: 42px;
    border-radius: var(--radius);
    border: 1px solid var(--border-glass);
    background: var(--surface-glass);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.05rem;
    transition: background 0.2s, border-color 0.2s;
}

.icon-btn:hover {
    background: rgba(79, 70, 229, 0.1);
    border-color: rgba(79, 70, 229, 0.25);
}

html[data-theme="dark"] .icon-theme-light,
html[data-theme="light"] .icon-theme-dark {
    display: none;
}

.user-menu-wrap {
    position: relative;
}

.user-menu-btn {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.35rem 0.85rem 0.35rem 0.45rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-glass);
    background: var(--surface-glass);
    color: var(--text-primary);
    cursor: pointer;
    transition: background 0.2s;
}

.user-menu-btn:hover {
    background: rgba(79, 70, 229, 0.08);
}

.user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--brand-500), #7c3aed);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-info {
    display: none;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
}

@media (min-width: 640px) {
    .user-info {
        display: flex;
    }
}

.user-name {
    font-size: 0.75rem;
    font-weight: 700;
    line-height: 1.2;
}

.user-email {
    font-size: 0.625rem;
    color: var(--text-muted);
    line-height: 1.2;
}

.user-chevron {
    font-size: 0.65rem;
    color: var(--text-muted);
}

.user-dropdown {
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    min-width: 220px;
    padding: 0.5rem;
    border-radius: var(--radius-lg);
    background: var(--bg-base);
    border: 1px solid var(--border-glass);
    box-shadow: var(--shadow-card);
    z-index: 50;
}

.user-dropdown[hidden] {
    display: none;
}

.user-dropdown-head {
    padding: 0.5rem 0.75rem 0.75rem;
    border-bottom: 1px solid var(--border-glass);
    margin-bottom: 0.35rem;
}

.user-dropdown-role {
    margin: 0.15rem 0 0;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--brand-500);
}

.user-dropdown-item {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.65rem 0.75rem;
    border: none;
    border-radius: 8px;
    background: none;
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    text-align: left;
    transition: background 0.15s;
}

.user-dropdown-logout {
    color: #f43f5e;
}

.user-dropdown-logout:hover {
    background: rgba(244, 63, 94, 0.1);
}

/* Main & Footer */
.app-main {
    position: relative;
    z-index: 1;
    padding: var(--spacing-xl) 0 3rem;
    min-height: calc(100vh - 140px);
}

.app-footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--border-glass);
    padding: var(--spacing-xl) 0;
}

.footer-inner {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: var(--spacing-lg);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 0;
}

.footer-logo {
    display: inline-flex;
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--brand-500), #7c3aed);
    color: #fff;
    margin-bottom: 0;
}

.footer-title {
    display: block;
    font-weight: 700;
    margin: 0;
    white-space: nowrap;
}

.footer-copy {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.875rem;
    text-align: center;
    justify-self: center;
    white-space: nowrap;
}

.footer-tagline {
    margin: 0;
    justify-self: end;
    max-width: 280px;
    text-align: right;
    font-size: 0.875rem;
    line-height: 1.45;
    color: var(--text-muted);
}

@media (max-width: 768px) {
    .footer-inner {
        grid-template-columns: 1fr;
        justify-items: center;
        text-align: center;
    }

    .footer-brand {
        justify-content: center;
    }

    .footer-copy {
        justify-self: center;
    }

    .footer-tagline {
        justify-self: center;
        max-width: none;
        text-align: center;
    }
}

.footer-privacy {
    margin: 0;
    max-width: 320px;
    text-align: right;
    font-size: 0.75rem;
    line-height: 1.45;
}

.footer-privacy i {
    color: var(--brand-500);
    margin-right: 0.25rem;
}

.privacy-notice {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin: 0.65rem 0 0;
    padding: 0.55rem 0.75rem;
    border-radius: var(--radius);
    font-size: 0.75rem;
    line-height: 1.45;
    color: var(--text-muted);
    background: rgba(79, 70, 229, 0.06);
    border: 1px solid rgba(79, 70, 229, 0.12);
}

.privacy-notice i {
    flex-shrink: 0;
    margin-top: 0.1rem;
    color: var(--brand-500);
}

.compress-workspace .privacy-notice {
    margin-top: 0.75rem;
}

/* Glass card */
.glass-card,
.tool-card {
    background: var(--surface-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-card);
    margin-bottom: var(--spacing-lg);
}

.glass-card:hover {
    box-shadow: var(--shadow-glow);
}

/* Hero (home) */
.home-hero {
    text-align: center;
    max-width: 720px;
    margin: 0 auto var(--spacing-xl);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.85rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--brand-500);
    background: rgba(79, 70, 229, 0.1);
    border: 1px solid rgba(79, 70, 229, 0.2);
    margin-bottom: var(--spacing-md);
}

.hero-title {
    margin: 0 0 var(--spacing-md);
    font-size: clamp(1.85rem, 5vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.15;
}

.hero-gradient {
    background: linear-gradient(90deg, var(--brand-500), #8b5cf6, #ec4899);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-desc {
    margin: 0;
    color: var(--text-muted);
    font-size: 1.05rem;
}

.search-wrap {
    position: relative;
    max-width: 560px;
    margin: var(--spacing-xl) auto 0;
}

.search-glow {
    position: absolute;
    inset: -4px;
    border-radius: var(--radius-xl);
    background: linear-gradient(90deg, var(--brand-500), #a855f7);
    opacity: 0.15;
    filter: blur(8px);
    transition: opacity 0.3s;
    pointer-events: none;
}

.search-wrap:focus-within .search-glow {
    opacity: 0.35;
}

.search-input-wrap {
    position: relative;
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 1rem 5.5rem 1rem 2.75rem;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-glass);
    background: var(--input-bg);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    box-shadow: var(--shadow-card);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.search-input:focus {
    outline: none;
    border-color: rgba(79, 70, 229, 0.5);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.search-kbd {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    gap: 0.2rem;
    padding: 0.25rem 0.5rem;
    border-radius: 8px;
    font-size: 0.7rem;
    font-family: ui-monospace, monospace;
    color: var(--text-muted);
    background: var(--surface-glass);
    border: 1px solid var(--border-glass);
}

.search-suggestions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: var(--spacing-md);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.search-chip {
    padding: 0.3rem 0.65rem;
    border-radius: 8px;
    border: 1px solid var(--border-glass);
    background: var(--surface-glass);
    color: var(--text-primary);
    font-size: 0.75rem;
    cursor: pointer;
    transition: background 0.15s;
}

.search-chip:hover {
    background: rgba(79, 70, 229, 0.1);
}

/* Category pills */
.category-nav {
    border-bottom: 1px solid var(--border-glass);
    margin-bottom: var(--spacing-xl);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.category-nav-inner {
    display: flex;
    gap: 1.5rem;
    min-width: max-content;
    padding-bottom: 0.5rem;
}

.category-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0 0 1rem;
    border: none;
    border-bottom: 2px solid transparent;
    background: none;
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    white-space: nowrap;
    transition: color 0.2s, border-color 0.2s;
}

.category-pill:hover {
    color: var(--text-primary);
}

.category-pill.is-active {
    color: var(--brand-500);
    border-bottom-color: var(--brand-500);
    font-weight: 600;
}

.category-count {
    padding: 0.1rem 0.45rem;
    border-radius: 999px;
    font-size: 0.7rem;
    background: rgba(100, 116, 139, 0.15);
}

.category-pill.is-active .category-count {
    background: rgba(79, 70, 229, 0.15);
}

/* Tool grid cards */
.tools-grid-home {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--spacing-lg);
}

.tool-grid-card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 0;
    border-radius: var(--radius-lg);
    background: var(--surface-glass);
    border: 1px solid var(--border-glass);
    color: inherit;
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
    overflow: hidden;
}

.tool-grid-card-link {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: var(--spacing-lg);
    text-decoration: none;
    color: inherit;
}

.tool-grid-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
    border-color: rgba(79, 70, 229, 0.25);
}

.tool-grid-card[hidden] {
    display: none;
}

.tool-grid-card-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.tool-grid-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.1rem;
}

.tool-grid-badge {
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    background: rgba(79, 70, 229, 0.12);
    color: var(--brand-500);
}

.tool-grid-card h3 {
    margin: 0 0 0.35rem;
    font-size: 1rem;
    font-weight: 700;
}

.tool-grid-card p {
    margin: 0 0 var(--spacing-md);
    font-size: 0.85rem;
    color: var(--text-muted);
    flex: 1;
}

.tool-grid-cta {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--brand-500);
}

.tool-fav-btn {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 8px;
    background: var(--surface-glass);
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.15s, background 0.15s;
    z-index: 2;
}

.tool-fav-btn:hover,
.tool-fav-btn.is-fav {
    color: #f43f5e;
    background: rgba(244, 63, 94, 0.1);
}

.empty-state {
    text-align: center;
    padding: 4rem 1rem;
}

.empty-state-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-md);
    border-radius: 50%;
    background: var(--surface-glass);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 1.5rem;
}

.empty-state h3 {
    margin: 0 0 0.35rem;
}

/* Gradient icon colors */
.grad-amber { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.grad-blue { background: linear-gradient(135deg, #3b82f6, #6366f1); }
.grad-violet { background: linear-gradient(135deg, #8b5cf6, #6366f1); }
.grad-rose { background: linear-gradient(135deg, #f43f5e, #ec4899); }
.grad-teal { background: linear-gradient(135deg, #14b8a6, #06b6d4); }
.grad-indigo { background: linear-gradient(135deg, #6366f1, #4f46e5); }
.grad-purple { background: linear-gradient(135deg, #a855f7, #6366f1); }
.grad-pink { background: linear-gradient(135deg, #ec4899, #f43f5e); }
.grad-sky { background: linear-gradient(135deg, #0ea5e9, #6366f1); }
.grad-yellow { background: linear-gradient(135deg, #eab308, #f97316); }
.grad-fuchsia { background: linear-gradient(135deg, #d946ef, #8b5cf6); }
.grad-emerald { background: linear-gradient(135deg, #10b981, #059669); }
.grad-orange { background: linear-gradient(135deg, #f97316, #ef4444); }
.grad-slate { background: linear-gradient(135deg, #64748b, #475569); }
.grad-gray { background: linear-gradient(135deg, #6b7280, #374151); }
.grad-cyan { background: linear-gradient(135deg, #06b6d4, #3b82f6); }
.grad-indigo-deep { background: linear-gradient(135deg, #4338ca, #312e81); }

/* Tool page — full width của .container (cùng lề với trang chủ) */
.tool-page {
    width: 100%;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: var(--spacing-lg);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.breadcrumb a {
    color: var(--brand-500);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.tool-page-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.tool-page-icon {
    flex-shrink: 0;
    width: 52px;
    height: 52px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.25rem;
}

.tool-page-header h1 {
    margin: 0 0 0.35rem;
    font-size: 1.65rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.subtitle {
    color: var(--text-muted);
    margin: 0;
    font-size: 0.95rem;
}

.tool-section h1,
.auth-card h1 {
    margin: 0 0 var(--spacing-sm);
}

.tool-card h2 {
    margin: 0 0 var(--spacing-md);
    font-size: 1.1rem;
}

/* Auth — tham chiếu docs/thiết kế trang đăng nhập */
body.app-body.is-auth-page {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.is-auth-page .app-main--auth {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.is-auth-page .app-main--auth > .container {
    width: 100%;
    max-width: 420px;
    padding-top: var(--spacing-md);
    padding-bottom: var(--spacing-md);
}

.is-auth-page .app-footer {
    margin-top: auto;
}

.auth-page {
    width: 100%;
}

.is-auth-page .auth-card.glass-card {
    background: rgba(13, 18, 35, 0.45);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xl);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.45);
    padding: 1.5rem;
    margin-bottom: 0;
}

html[data-theme="light"] .is-auth-page .auth-card.glass-card {
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: var(--shadow-card);
}

.auth-segment {
    position: relative;
    display: flex;
    align-items: stretch;
    padding: 4px;
    margin-bottom: 1.25rem;
    border-radius: var(--radius);
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.04);
}

html[data-theme="light"] .auth-segment {
    background: rgba(15, 23, 42, 0.05);
    border-color: rgba(0, 0, 0, 0.06);
}

.auth-segment-indicator {
    position: absolute;
    top: 4px;
    bottom: 4px;
    left: 4px;
    width: calc(50% - 4px);
    border-radius: calc(var(--radius) - 4px);
    background: var(--brand-600);
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
    transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
    z-index: 0;
}

.auth-segment-indicator.is-right {
    left: 50%;
}

.auth-segment-btn {
    position: relative;
    z-index: 1;
    flex: 1;
    margin: 0;
    padding: 0.45rem 0.5rem;
    border: none;
    border-radius: calc(var(--radius) - 4px);
    background: transparent;
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 700;
    font-family: inherit;
    line-height: 1.2;
    cursor: pointer;
    transition: color 0.2s ease;
    -webkit-appearance: none;
    appearance: none;
}

.auth-segment-btn.is-active {
    color: #fff;
}

html[data-theme="light"] .auth-segment-btn.is-active {
    color: #fff;
}

.auth-panel {
    display: none;
}

.auth-panel.is-active {
    display: block;
}

.auth-desc {
    margin: 0 0 1rem;
    font-size: 0.75rem;
    line-height: 1.55;
    color: var(--text-muted);
    text-align: center;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
}

.auth-field {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.auth-label-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.auth-label {
    font-size: 0.625rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.auth-forgot-link {
    border: none;
    padding: 0;
    background: none;
    font-size: 0.625rem;
    font-weight: 500;
    color: #818cf8;
    cursor: pointer;
    font-family: inherit;
    -webkit-appearance: none;
    appearance: none;
}

.auth-forgot-link:hover {
    color: #a5b4fc;
}

.auth-input-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.auth-input-icon {
    position: absolute;
    left: 0.875rem;
    color: var(--text-muted);
    font-size: 0.75rem;
    pointer-events: none;
    z-index: 1;
}

.auth-input-wrap--compact .auth-input-icon {
    left: 0.65rem;
    font-size: 0.6875rem;
}

.auth-input {
    width: 100%;
    padding: 0.625rem 0.875rem 0.625rem 2.25rem;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.02);
    color: var(--text-primary);
    font-size: 0.75rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

html[data-theme="light"] .auth-input {
    background: rgba(0, 0, 0, 0.02);
    border-color: rgba(0, 0, 0, 0.1);
}

.auth-input::placeholder {
    color: var(--text-muted);
    opacity: 0.85;
}

.auth-input:focus {
    border-color: rgba(79, 70, 229, 0.5);
    background: rgba(79, 70, 229, 0.04);
    box-shadow: 0 0 12px rgba(79, 70, 229, 0.2);
}

.auth-input--password {
    padding-right: 2.5rem;
}

.auth-input--compact {
    padding-left: 1.85rem;
    padding-right: 0.5rem;
}

.auth-password-toggle {
    position: absolute;
    right: 0.75rem;
    border: none;
    padding: 0.25rem;
    background: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.75rem;
    line-height: 1;
    -webkit-appearance: none;
    appearance: none;
}

.auth-password-toggle:hover {
    color: var(--text-primary);
}

.auth-field-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.auth-message {
    margin: 0;
    padding: 0.75rem;
    border-radius: var(--radius);
    font-size: 0.75rem;
    font-weight: 600;
    text-align: center;
}

.auth-message.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.15);
    color: var(--color-error);
}

.auth-message.success,
.auth-message.info {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.15);
    color: #34d399;
}

.auth-submit-btn {
    margin-top: 0.25rem;
    padding: 0.625rem 1rem;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: var(--radius);
}

.btn-header-auth {
    padding: 0.45rem 0.9rem;
    font-size: 0.8125rem;
    white-space: nowrap;
}

.btn-header-ci {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 0.75rem;
    font-size: 0.8125rem;
    white-space: nowrap;
}

.btn-header-ci-label {
    display: none;
}

@media (min-width: 768px) {
    .btn-header-ci-label {
        display: inline;
    }
}

@media (max-width: 480px) {
    .is-auth-page .auth-card.glass-card {
        padding: 1.25rem;
    }

    .auth-field-grid {
        grid-template-columns: 1fr;
    }

    .btn-header-auth {
        padding: 0.4rem 0.75rem;
        font-size: 0.75rem;
    }
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="date"],
.form-group input[type="time"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--input-border);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    background: var(--input-bg);
    color: var(--text-primary);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: rgba(79, 70, 229, 0.5);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

/* Upload zone */
.upload-zone {
    border: 2px dashed var(--border-glass);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    transition: border-color 0.2s, background 0.2s;
    cursor: pointer;
    position: relative;
}

.upload-zone.dragover {
    border-color: var(--brand-500);
    background: rgba(79, 70, 229, 0.06);
}

.upload-zone-input {
    position: absolute;
    width: 0;
    height: 0;
    opacity: 0;
    pointer-events: none;
}

.upload-zone-icon {
    color: var(--brand-500);
    margin-bottom: var(--spacing-sm);
    font-size: 2.5rem;
}

.upload-zone-title {
    font-weight: 600;
    margin: 0 0 var(--spacing-sm);
    font-size: 1.05rem;
}

.upload-zone-link {
    background: none;
    border: none;
    padding: 0;
    color: var(--brand-500);
    font-weight: 600;
    cursor: pointer;
    text-decoration: underline;
    font-size: inherit;
    font-family: inherit;
}

.upload-zone-limit {
    margin-top: var(--spacing-sm);
}

.upload-file-list {
    text-align: left;
}

.upload-file-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--surface-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    margin-bottom: var(--spacing-sm);
}

.upload-file-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(79, 70, 229, 0.12);
    color: var(--brand-500);
    border-radius: var(--radius);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.upload-file-info {
    flex: 1;
    min-width: 0;
}

.upload-file-name {
    display: block;
    font-size: 0.95rem;
    word-break: break-all;
    margin-bottom: 0.15rem;
}

.upload-file-size {
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
}

.upload-file-summary {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    margin: var(--spacing-sm) 0 var(--spacing-md);
    font-weight: 500;
}

.upload-file-change {
    width: 100%;
    margin-top: var(--spacing-sm);
}

.format-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: var(--spacing-lg);
}

.format-badge {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    background: var(--surface-glass);
    border: 1px solid var(--border-glass);
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.75rem 1.25rem;
    border: none;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: transform 0.15s, opacity 0.2s, box-shadow 0.2s;
}

.btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, var(--brand-500), #7c3aed);
    color: #fff;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
}

.btn-secondary {
    background: var(--surface-glass);
    color: var(--text-primary);
    border: 1px solid var(--border-glass);
}

.btn-secondary:hover:not(:disabled) {
    background: rgba(79, 70, 229, 0.08);
}

.btn-block {
    width: 100%;
}

/* Khoảng cách feedback sau form (nút submit ↔ status/result) */
.form + .status-box {
    margin-top: var(--spacing-lg);
}

.status-box + .tool-result,
.status-box + .ai-result,
.status-box + .compress-result {
    margin-top: var(--spacing-lg);
}

/* Status & messages */
.hint {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.message,
.status-box {
    padding: var(--spacing-md);
    border-radius: var(--radius);
    margin-bottom: var(--spacing-md);
    font-size: 0.9rem;
    border: 1px solid transparent;
}

.message.error,
.status-box.error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-error);
    border-color: rgba(239, 68, 68, 0.25);
}

.message.success,
.status-box.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
    border-color: rgba(16, 185, 129, 0.25);
}

.status-box.info {
    background: rgba(59, 130, 246, 0.1);
    color: var(--color-info);
    border-color: rgba(59, 130, 246, 0.25);
}

/* Results */
.tool-result,
.ai-result,
.study-result,
.compress-result {
    margin-top: var(--spacing-md);
    padding: var(--spacing-lg);
    background: rgba(16, 185, 129, 0.06);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--radius-lg);
}

.tool-result h3,
.ai-result h3 {
    margin: 0 0 var(--spacing-md);
    font-size: 1rem;
    color: var(--color-success);
}

.ai-result pre,
.study-result pre {
    white-space: pre-wrap;
    word-break: break-word;
    margin: 0;
    font-family: inherit;
}

.ai-summarize-result .ai-result-block + .ai-result-block {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-glass);
}

.ai-summarize-result .ai-result-block h3 {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin: 0 0 0.5rem;
    font-size: 0.95rem;
}

.compress-size-compare {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--surface-glass);
    border-radius: var(--radius);
    border: 1px solid var(--border-glass);
}

.compress-size-box {
    text-align: center;
}

.compress-size-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 0.25rem;
}

.compress-size-value {
    font-size: 1.15rem;
    font-weight: 700;
}

.compress-size-arrow {
    color: var(--color-success);
    font-size: 1.25rem;
    font-weight: 700;
}

.compress-saved-badge {
    display: inline-block;
    padding: 0.35rem 0.85rem;
    background: var(--color-success);
    color: #fff;
    border-radius: 999px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.compress-result-meta {
    margin: 0 0 var(--spacing-md);
}

.compress-zero-hint {
    margin: var(--spacing-md) 0 0;
    padding: var(--spacing-md);
    border-radius: var(--radius);
    background: rgba(59, 130, 246, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.2);
    color: var(--text-primary);
    font-size: 0.875rem;
    line-height: 1.5;
}

.compress-zero-hint i {
    color: var(--color-info);
    margin-right: 0.35rem;
}

.compress-backend-notice {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius);
    background: rgba(79, 70, 229, 0.06);
    border: 1px solid rgba(79, 70, 229, 0.18);
}

.compress-backend-notice.is-gs-missing {
    background: rgba(245, 158, 11, 0.08);
    border-color: rgba(245, 158, 11, 0.25);
}

.compress-backend-title {
    margin: 0 0 var(--spacing-sm);
    font-weight: 600;
    font-size: 0.9rem;
}

.compress-backend-list {
    margin: 0 0 var(--spacing-sm);
    padding-left: 0;
    list-style: none;
}

.compress-backend-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 0.4rem;
    font-size: 0.85rem;
    line-height: 1.45;
}

.compress-backend-list .fa-check {
    color: var(--color-success);
    margin-top: 0.15rem;
    flex-shrink: 0;
}

.compress-backend-status {
    margin: 0;
    font-size: 0.8rem;
}

.compress-backend-notice code {
    font-size: 0.78rem;
    padding: 0.1rem 0.35rem;
    border-radius: 4px;
    background: var(--surface-glass);
}

/* History */
.history-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.history-item {
    padding: var(--spacing-md);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    background: var(--surface-glass);
}

.history-item .meta {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.badge {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-pending { background: rgba(245, 158, 11, 0.15); color: #d97706; }
.badge-processing { background: rgba(59, 130, 246, 0.15); color: #2563eb; }
.badge-completed { background: rgba(16, 185, 129, 0.15); color: #059669; }
.badge-failed { background: rgba(239, 68, 68, 0.15); color: #dc2626; }

/* Study panels */
.study-panel {
    display: none;
}

.study-panel.is-active {
    display: block;
}

.gpa-row {
    display: grid;
    grid-template-columns: 1fr 80px 120px;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.plan-list {
    list-style: none;
    padding: 0;
    margin: var(--spacing-md) 0 0;
}

.plan-list li {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-glass);
}

#barcodeOutput.barcode-output-wrap {
    display: none;
    text-align: center;
}

#barcodeOutput.barcode-output-wrap.has-barcode {
    display: block;
}

.barcode-output-wrap .barcode-canvas {
    display: block;
    margin: 0 auto;
    max-width: 100%;
    height: auto;
    border-radius: 6px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 100;
    max-width: 360px;
    animation: toast-in 0.3s ease;
}

.toast[hidden] {
    display: none;
}

@keyframes toast-in {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.toast-inner {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    background: var(--bg-base);
    border: 1px solid var(--border-glass);
    box-shadow: var(--shadow-card);
}

.toast-icon-wrap {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.toast.is-success .toast-icon-wrap {
    background: rgba(16, 185, 129, 0.15);
    color: var(--color-success);
}

.toast.is-error .toast-icon-wrap {
    background: rgba(239, 68, 68, 0.15);
    color: var(--color-error);
}

.toast-heading {
    margin: 0 0 0.15rem;
    font-weight: 700;
    font-size: 0.9rem;
}

.toast-message {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Legacy compat */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--spacing-lg);
}

.tool-link-card {
    display: block;
    background: var(--surface-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s, box-shadow 0.2s;
}

.tool-link-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

@media (max-width: 640px) {
    .tool-card,
    .auth-card,
    .glass-card {
        padding: var(--spacing-lg);
    }

    .compress-size-compare {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .compress-size-arrow {
        transform: rotate(90deg);
    }

    .tool-page-header {
        flex-direction: column;
    }

    .gpa-row {
        grid-template-columns: 1fr;
    }

    .compress-options-grid {
        grid-template-columns: 1fr;
    }

    .compress-stats-grid {
        grid-template-columns: 1fr;
    }
}

/* ── Tool page v2 (compact layout — chuẩn toàn app) ── */

.breadcrumb-v2 {
    font-size: 0.75rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.breadcrumb-v2 a {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.15s;
}

.breadcrumb-v2 a:hover {
    color: var(--brand-500);
}

.breadcrumb-sep {
    font-size: 0.55rem;
    color: var(--text-muted);
    opacity: 0.6;
}

.breadcrumb-current {
    color: var(--text-primary);
    font-weight: 600;
}

.tool-hero-v2,
.compress-hero {
    margin-bottom: var(--spacing-md);
}

.tool-hero-v2-main,
.compress-hero-main {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.65rem;
}

.tool-hero-v2-icon,
.compress-hero-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.15rem;
    box-shadow: 0 4px 14px rgba(245, 158, 11, 0.15);
}

.tool-hero-v2 h1,
.compress-hero h1 {
    margin: 0;
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.tool-hero-v2-desc,
.compress-hero-desc {
    margin: 0.15rem 0 0;
    font-size: 0.75rem;
    color: var(--text-muted);
    max-width: 36rem;
    line-height: 1.4;
}

.tool-hero-v2-hint {
    margin: 0;
    font-size: 0.75rem;
    line-height: 1.45;
}

.convert-format-note {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin: 0 0 var(--spacing-md);
    padding: 0.65rem 0.85rem;
    font-size: 0.75rem;
    line-height: 1.5;
    color: var(--text-muted);
    background: rgba(79, 70, 229, 0.06);
    border: 1px solid rgba(79, 70, 229, 0.15);
    border-radius: var(--radius);
}

.convert-format-note i {
    color: var(--brand-500);
    margin-top: 0.15rem;
    flex-shrink: 0;
}

.convert-format-note a {
    color: var(--brand-500);
    font-weight: 600;
    text-decoration: none;
}

.convert-format-note a:hover {
    text-decoration: underline;
}

.format-badges-v2 {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.45rem;
}

.format-badges-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-right: 0.25rem;
}

.format-badge-v2 {
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    font-size: 0.65rem;
    font-weight: 700;
    font-family: ui-monospace, monospace;
    border: 1px solid transparent;
}

.fmt-rose { background: rgba(244, 63, 94, 0.1); color: #f43f5e; border-color: rgba(244, 63, 94, 0.2); }
.fmt-blue { background: rgba(59, 130, 246, 0.1); color: #3b82f6; border-color: rgba(59, 130, 246, 0.2); }
.fmt-emerald { background: rgba(16, 185, 129, 0.1); color: #10b981; border-color: rgba(16, 185, 129, 0.2); }
.fmt-orange { background: rgba(249, 115, 22, 0.1); color: #f97316; border-color: rgba(249, 115, 22, 0.2); }
.fmt-indigo { background: rgba(99, 102, 241, 0.1); color: #6366f1; border-color: rgba(99, 102, 241, 0.2); }
.fmt-teal { background: rgba(20, 184, 166, 0.1); color: #14b8a6; border-color: rgba(20, 184, 166, 0.2); }
.fmt-fuchsia { background: rgba(217, 70, 239, 0.1); color: #d946ef; border-color: rgba(217, 70, 239, 0.2); }
.fmt-purple { background: rgba(168, 85, 247, 0.1); color: #a855f7; border-color: rgba(168, 85, 247, 0.2); }
.fmt-sky { background: rgba(14, 165, 233, 0.1); color: #0ea5e9; border-color: rgba(14, 165, 233, 0.2); }
.fmt-violet { background: rgba(139, 92, 246, 0.1); color: #8b5cf6; border-color: rgba(139, 92, 246, 0.2); }
.fmt-slate { background: rgba(100, 116, 139, 0.12); color: #94a3b8; border-color: rgba(100, 116, 139, 0.25); }

.tool-workspace-v2,
.compress-workspace {
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-card);
}

.tool-form-v2,
.compress-form {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.tool-workspace-v2 .form-group {
    margin-bottom: 0;
}

/* Study tools: không bọc .tool-form-v2 — cần khoảng cách giữa các ô */
.tool-workspace-v2.study-panel .form-group {
    margin-bottom: 0.75rem;
}

.tool-workspace-v2.study-panel .form-group:last-of-type {
    margin-bottom: 1rem;
}

.tool-workspace-v2.study-panel .btn-tool-submit-v2,
.tool-workspace-v2.study-panel .btn-primary.btn-block {
    margin-top: 0.15rem;
}

.tool-workspace-v2.study-panel .tool-toolbar {
    margin-bottom: 0.75rem;
}

.tool-workspace-v2 .form-group label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 0.35rem;
}

.tool-workspace-v2 .form-group select,
.tool-workspace-v2 .form-group input[type="text"],
.tool-workspace-v2 .form-group textarea {
    width: 100%;
    padding: 0.55rem 0.65rem;
    border-radius: 8px;
    border: 1px solid var(--input-border);
    background: var(--input-bg);
    color: var(--text-primary);
    font-size: 0.85rem;
    font-family: inherit;
}

.tool-workspace-v2 .form-group textarea {
    min-height: 140px;
    resize: vertical;
}

.tool-info-callout {
    display: flex;
    gap: 0.65rem;
    align-items: flex-start;
    margin-bottom: 1rem;
    padding: 0.75rem 0.9rem;
    border-radius: var(--radius);
    border: 1px solid rgba(59, 130, 246, 0.25);
    background: rgba(59, 130, 246, 0.08);
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.5;
}

.tool-info-callout i {
    color: #3b82f6;
    margin-top: 0.15rem;
}

.form-hint {
    margin: 0.35rem 0 0;
    font-size: 0.78rem;
    color: var(--text-muted);
    line-height: 1.45;
}

.tool-toolbar,
.compress-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.55rem 0.75rem;
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-glass);
}

.tool-toolbar-label,
.compress-toolbar-label {
    flex-shrink: 0;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
}

.tool-toolbar-label i,
.compress-toolbar-label i {
    color: var(--text-muted);
    margin-right: 0.35rem;
}

.tool-toolbar-select {
    flex: 1;
    min-width: 0;
    padding: 0.45rem 0.65rem;
    border-radius: 8px;
    border: 1px solid var(--input-border);
    background: var(--input-bg);
    color: var(--text-primary);
    font-size: 0.8rem;
    font-family: inherit;
}

.upload-zone--v2 {
    border-radius: var(--radius);
    padding: 1.25rem var(--spacing-md);
    background: rgba(255, 255, 255, 0.01);
    margin-bottom: 0;
    transition: padding 0.2s, min-height 0.2s;
}

.upload-zone--v2.has-file {
    padding: 0;
    cursor: default;
    border: none;
    background: transparent;
}

.upload-zone--v2.has-file .upload-zone-title,
.upload-zone--v2.has-file .upload-zone-chip {
    display: none;
}

.upload-zone-icon-ring {
    width: 40px;
    height: 40px;
    margin: 0 auto 0.5rem;
    border-radius: 50%;
    background: rgba(79, 70, 229, 0.1);
    color: var(--brand-500);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    box-shadow: inset 0 2px 8px rgba(79, 70, 229, 0.08);
}

.upload-zone--v2 .upload-zone-title {
    margin: 0;
    font-size: 0.85rem;
}

.upload-zone-chip {
    display: inline-block;
    margin-top: 0.35rem;
    padding: 0.15rem 0.55rem;
    border-radius: 999px;
    font-size: 0.6rem;
    font-weight: 600;
    color: var(--text-muted);
    background: var(--surface-glass);
    border: 1px solid var(--border-glass);
}

.upload-file-list--v2 {
    text-align: left;
}

.upload-file-row-v2 {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    min-height: 64px;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    background: var(--input-bg);
    border: 1px solid var(--border-glass);
}

.upload-file-row-v2-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 0;
    flex: 1;
}

.ext-badge-v2--sm {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.6rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.upload-file-row-v2-info {
    flex: 1;
    min-width: 0;
    line-height: 1.3;
}

.upload-file-row-v2-info .upload-file-name {
    display: block;
    font-size: 0.9rem;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 0.15rem;
}

.upload-file-row-v2-info .upload-file-size {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

.upload-file-row-v2-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.btn-file-change-v2 {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.5rem;
    border: none;
    border-radius: 8px;
    background: transparent;
    color: #818cf8;
    font-size: 0.8rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    white-space: nowrap;
    transition: color 0.15s, background 0.15s;
}

.btn-file-change-v2 i {
    font-size: 0.75rem;
}

.btn-file-change-v2:hover {
    color: #a5b4fc;
    background: rgba(129, 140, 248, 0.08);
}

.btn-file-delete-v2 {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    transition: background 0.15s, color 0.15s;
}

.btn-file-delete-v2:hover {
    background: rgba(244, 63, 94, 0.12);
    color: #f43f5e;
}

.upload-file-row-v2 .ext-badge-v2--sm {
    border: 1px solid transparent;
}

.upload-file-row-v2 .ext-badge-v2--sm.fmt-rose {
    background: rgba(244, 63, 94, 0.18);
    border-color: rgba(244, 63, 94, 0.28);
    color: #fb7185;
}

.compress-segment {
    position: relative;
    display: flex;
    align-items: stretch;
    padding: 3px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-glass);
    flex-shrink: 0;
}

.compress-segment-indicator {
    position: absolute;
    top: 3px;
    bottom: 3px;
    left: 3px;
    width: 0;
    border-radius: 999px;
    background: var(--brand-500);
    box-shadow: 0 2px 10px rgba(79, 70, 229, 0.4);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), width 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
    z-index: 0;
}

.compress-segment-option {
    position: relative;
    z-index: 1;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 0.4rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    white-space: nowrap;
    transition: color 0.2s ease;
    user-select: none;
}

.compress-segment-option input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
    pointer-events: none;
}

.compress-segment-option:has(input:checked) {
    color: #fff;
}

.convert-format-toolbar .compress-segment {
    flex: 1;
    min-width: 0;
}

.convert-format-segment .compress-segment-option {
    flex: 1;
    padding: 0.4rem 0.55rem;
    font-size: 0.72rem;
}

.convert-format-hint {
    margin-top: 0.35rem;
}

@media (max-width: 640px) {
    .convert-format-toolbar {
        flex-direction: column;
        align-items: stretch;
        gap: 0.65rem;
    }

    .convert-format-segment .compress-segment-option {
        padding: 0.38rem 0.4rem;
        font-size: 0.68rem;
    }
}

.compress-level-hint {
    margin: -0.35rem 0 0;
    padding: 0 0.25rem;
    font-size: 0.7rem;
    color: var(--text-muted);
    line-height: 1.35;
}

.btn-tool-submit-v2,
.btn-compress-submit {
    padding: 0.75rem;
    border-radius: var(--radius);
    font-weight: 700;
    font-size: 0.85rem;
    margin-top: 0.15rem;
}

.upload-bounce {
    animation: upload-bounce 2s ease infinite;
}

@keyframes upload-bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

.process-panel-v2 {
    margin-top: 0.65rem;
    padding-top: 0.65rem;
    border-top: 1px solid var(--border-glass);
}

.process-panel-v2.is-error {
    padding: var(--spacing-md);
    border-radius: var(--radius);
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: var(--color-error);
}

.process-simple-status {
    margin: 0;
    font-size: 0.875rem;
    font-weight: 600;
}

.process-simple-status--info {
    color: var(--brand-500);
}

.process-simple-status--success {
    color: var(--color-success);
}

.process-simple-status--error {
    color: var(--color-error);
}

.process-panel-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.75rem;
    margin-bottom: var(--spacing-sm);
}

.process-panel-label {
    color: var(--brand-500);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.process-panel-percent {
    font-family: ui-monospace, monospace;
    font-weight: 700;
}

.progress-bar-track {
    width: 100%;
    height: 6px;
    background: rgba(100, 116, 139, 0.2);
    border-radius: 999px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--brand-500), #8b5cf6);
    border-radius: 999px;
    transition: width 0.2s ease;
    width: 0%;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--text-muted);
}

.process-step {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.process-step-emoji {
    font-size: 0.75rem;
    line-height: 1;
}

.process-wait-tip {
    margin: 0.65rem 0 0;
    padding: 0.55rem 0.75rem;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
    background: rgba(79, 70, 229, 0.08);
    border: 1px solid rgba(79, 70, 229, 0.18);
    line-height: 1.45;
    transition: opacity 0.2s ease;
}

.process-wait-tip[hidden] {
    display: none !important;
}

.process-wait-tip.is-changing {
    opacity: 0.4;
}

.process-step.is-active {
    color: var(--brand-500);
    font-weight: 700;
}

.process-step.is-done {
    color: var(--color-success);
    font-weight: 700;
}

.tool-result-v2 {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-glass);
}

.tool-result-v2[hidden] {
    display: none;
}

.tool-result-success {
    text-align: center;
    padding: 0.5rem 0 0.25rem;
}

.tool-result-file-card {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    text-align: left;
    padding: 0.65rem 0.75rem;
    margin: 0.65rem 0 0.85rem;
    border-radius: var(--radius);
    background: rgba(16, 185, 129, 0.06);
    border: 1px solid rgba(16, 185, 129, 0.15);
}

.tool-result-ext {
    flex-shrink: 0;
}

.tool-result-file-info {
    min-width: 0;
    flex: 1;
}

.tool-result-success-title {
    margin: 0 0 0.35rem;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-success);
}

.tool-result-success-name {
    margin: 0;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-primary);
    word-break: break-word;
}

.tool-result-success-meta {
    margin: 0.2rem 0 0;
    font-size: 0.7rem;
    color: var(--text-muted);
}

.download-rename-block {
    margin-top: 0.85rem;
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.download-rename-label {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-muted);
}

.download-rename-input {
    width: 100%;
    padding: 0.55rem 0.7rem;
    border-radius: 8px;
    border: 1px solid var(--border-glass);
    background: rgba(15, 23, 42, 0.35);
    color: var(--text-primary);
    font-size: 0.82rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.download-rename-input:focus {
    outline: none;
    border-color: rgba(79, 70, 229, 0.55);
    box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.15);
}

[data-theme="light"] .download-rename-input {
    background: rgba(248, 250, 252, 0.9);
}

.compress-success-alert {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.55rem 0.65rem;
    border-radius: var(--radius);
    background: rgba(16, 185, 129, 0.08);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: var(--color-success);
    margin-bottom: 0.65rem;
}

.compress-success-alert-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(16, 185, 129, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.7rem;
}

.compress-success-alert p {
    margin: 0;
    font-size: 0.7rem;
}

.compress-success-alert strong {
    display: block;
    font-size: 0.75rem;
    margin-bottom: 0.05rem;
}

.compress-result-meta {
    margin: 0 0 0.5rem;
    font-size: 0.7rem;
}

.compress-zero-hint {
    margin: 0.5rem 0;
    padding: 0.45rem 0.65rem;
    font-size: 0.7rem;
    border-radius: 8px;
    background: rgba(245, 158, 11, 0.08);
    border: 1px solid rgba(245, 158, 11, 0.15);
    color: var(--text-muted);
}

.compress-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    margin-bottom: 0.65rem;
}

.compress-stat-card {
    padding: 0.65rem;
    border-radius: var(--radius);
    background: var(--input-bg);
    border: 1px solid var(--border-glass);
}

.compress-stat-card--ratio {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.compress-stat-card--after {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.08), rgba(139, 92, 246, 0.08));
    border-color: rgba(79, 70, 229, 0.2);
}

.compress-ratio-ring {
    position: relative;
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.compress-ratio-ring svg {
    position: absolute;
    inset: 0;
    transform: rotate(-90deg);
}

.compress-ratio-value {
    font-size: 1rem;
    font-weight: 800;
    color: var(--brand-500);
    position: relative;
    z-index: 1;
}

.compress-stat-label {
    display: block;
    font-size: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.compress-stat-value {
    font-size: 1.15rem;
    font-weight: 800;
    margin: 0;
    line-height: 1.2;
}

.compress-stat-value--indigo {
    color: var(--brand-500);
}

.compress-stat-foot {
    margin-top: 0.35rem;
    font-size: 0.65rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.35rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.compress-stat-foot--saved {
    color: var(--brand-500);
    font-weight: 700;
}

.btn-download-compress {
    width: 100%;
    padding: 0.65rem;
    border: none;
    border-radius: var(--radius);
    background: #059669;
    color: #fff;
    font-weight: 700;
    font-size: 0.85rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-decoration: none;
    box-shadow: 0 4px 14px rgba(5, 150, 105, 0.25);
    transition: background 0.15s;
}

.btn-download-compress:hover {
    background: #047857;
    color: #fff;
}

.tool-history-v2,
.compress-history {
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
}

.tool-history-v2-head,
.compress-history-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.65rem;
    gap: var(--spacing-md);
}

.tool-history-v2-title,
.compress-history-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tool-history-v2-title h2,
.compress-history-title h2 {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 700;
}

.tool-history-v2-icon,
.compress-history-icon {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: rgba(79, 70, 229, 0.1);
    color: var(--brand-500);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
}

.tool-history-v2-count,
.compress-history-count {
    font-size: 0.75rem;
    color: var(--text-muted);
    padding: 0.25rem 0.65rem;
    border-radius: 999px;
    background: var(--surface-glass);
    border: 1px solid var(--border-glass);
    font-weight: 600;
    white-space: nowrap;
}

.tool-history-guest {
    padding: var(--spacing-xl);
    text-align: center;
}

.tool-history-guest-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--spacing-md);
    border-radius: var(--radius);
    background: rgba(79, 70, 229, 0.1);
    color: var(--brand-500);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.tool-history-guest h2 {
    margin: 0 0 var(--spacing-sm);
    font-size: 1rem;
}

.tool-history-guest-actions {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-top: var(--spacing-lg);
    flex-wrap: wrap;
}

.tool-workspace-v2 .study-panel h2,
.tool-workspace-v2 .ai-result h3 {
    margin: 0 0 0.65rem;
    font-size: 0.95rem;
    font-weight: 700;
}

.tool-workspace-v2 .ai-result pre {
    margin: 0;
    padding: 0.75rem;
    border-radius: var(--radius);
    background: var(--input-bg);
    border: 1px solid var(--border-glass);
    font-size: 0.8rem;
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 360px;
    overflow: auto;
}

.tool-workspace-v2 + .tool-workspace-v2 {
    margin-top: var(--spacing-md);
}

.history-table-wrap {
    overflow-x: auto;
}

.history-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.75rem;
    text-align: left;
}

.history-table th {
    padding: 0.45rem 0.35rem;
    border-bottom: 1px solid var(--border-glass);
    color: var(--text-muted);
    font-weight: 700;
    font-size: 0.7rem;
}

.history-table td {
    padding: 0.55rem 0.35rem;
    border-bottom: 1px solid var(--border-glass);
    vertical-align: middle;
}

.history-table .text-right {
    text-align: right;
}

.history-table tr:hover td {
    background: rgba(79, 70, 229, 0.03);
}

.history-job-id {
    font-family: ui-monospace, monospace;
    color: var(--text-muted);
    font-size: 0.7rem;
}

.history-file-name {
    font-weight: 600;
    max-width: 160px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.history-file-meta {
    font-size: 0.65rem;
    color: var(--text-muted);
    margin-top: 0.15rem;
}

.history-action-badge {
    display: inline-block;
    padding: 0.15rem 0.45rem;
    border-radius: 4px;
    font-size: 0.65rem;
    font-weight: 600;
    border: 1px solid transparent;
}

.history-action-badge--compress {
    background: rgba(245, 158, 11, 0.1);
    color: #d97706;
    border-color: rgba(245, 158, 11, 0.15);
}

.history-result-ok {
    color: var(--color-success);
    font-weight: 700;
}

.history-result-fail {
    color: var(--color-error);
    font-weight: 700;
}

.history-compress-stat {
    margin: 0.2rem 0 0;
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--brand-500);
    line-height: 1.3;
}

.btn-history-dl {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: rgba(79, 70, 229, 0.1);
    color: var(--brand-500);
    text-decoration: none;
    transition: background 0.15s, color 0.15s;
}

.btn-history-dl:hover {
    background: var(--brand-500);
    color: #fff;
}

.history-loading {
    text-align: center;
    padding: 1rem;
}