/* ===========================
   THEME — "Calm dashboard"
   Nguyên tắc 60-30-10:
     60% trung tính — nền xám rất nhạt, thẻ trắng viền mảnh, chữ slate.
     30% tint nhạt  — icon trên nền xanh/chàm nhạt (không khối gradient đậm).
     10% màu nhấn   — xanh đậm chỉ cho nút hành động chính & điểm cần chú ý.
   2 màu thương hiệu: xanh dương (#2563EB) + chàm/indigo (#4F46E5), xen kẽ
   qua biến --tone / --tone-soft (khối TONES bên dưới). Font Nunito.

   File này nạp SAU CÙNG trên mọi trang và chỉ ghi đè — không đổi JS.
   Gỡ thẻ <link> tới file này là quay về giao diện gốc.
   Lưu ý: không đặt padding/font-size cố định cho các selector mà
   responsive.css đã chỉnh trong @media (file này nạp sau nên sẽ đè mất).
   =========================== */

:root {
    --primary: #2563EB;
    --primary-dark: #1D4ED8;
    --primary-light: #6366F1;
    --secondary: #4F46E5;
    --success: #16A34A;
    --danger: #DC2626;
    --warning: #D97706;
    --info: #0284C7;

    /* Slate — trung tính hơi lạnh, dịu mắt hơn xám thuần */
    --white: #ffffff;
    --gray-50: #F4F8FF;
    --gray-100: #EAF1FC;
    --gray-200: #E2E8F0;
    --gray-300: #CBD5E1;
    --gray-400: #94A3B8;
    --gray-500: #64748B;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1E293B;
    --gray-900: #0F172A;

    --radius-sm: 8px;
    --radius-md: 10px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Bóng rất nhẹ, 2 lớp — thẻ "đặt" trên nền chứ không "nổi" */
    --shadow-sm: 0 1px 2px rgb(15 23 42 / .04);
    --shadow-md: 0 1px 2px rgb(15 23 42 / .04), 0 4px 12px rgb(15 23 42 / .04);
    --shadow-lg: 0 2px 4px rgb(15 23 42 / .04), 0 12px 28px -6px rgb(15 23 42 / .10);
    --shadow-xl: 0 24px 56px -12px rgb(15 23 42 / .25);

    /* Token dùng chung với lookup.css */
    --paper: #EFF4FC;
    --sheet: #ffffff;
    --line: #E0E8F5;
    --line-2: #CAD7EC;
    --text: #0F172A;
    --text-2: #56688A;
    --link: #3E5378;
    --brand-soft: #E3EDFE;
    --indigo-soft: #E8EAFF;
    --f-display: 'Nunito', 'Be Vietnam Pro', system-ui, sans-serif;
    --f-mono: 'Nunito', 'Be Vietnam Pro', system-ui, sans-serif;
    --ease: cubic-bezier(.2, .7, .3, 1);
    --ease-out: cubic-bezier(.16, 1, .3, 1);

    --footer-bg: linear-gradient(135deg, #0B1B45 0%, #132C6E 60%, #1E2A7A 100%);

    /* Tông mặc định */
    --tone: #2563EB;
    --tone-soft: #E3EDFE;

    --body-bg-start: var(--paper);
    --body-bg-end: var(--paper);
}

:root[data-theme="dark"] {
    --primary: #60A5FA;
    --primary-dark: #93C5FD;
    --primary-light: #818CF8;
    --secondary: #818CF8;
    --success: #4ADE80;
    --danger: #F87171;
    --warning: #FBBF24;
    --info: #38BDF8;

    --white: #111827;
    --gray-50: #0F1522;
    --gray-100: #151C2C;
    --gray-200: #1E2638;
    --gray-300: #2A3449;
    --gray-400: #5B6680;
    --gray-500: #94A3B8;
    --gray-600: #B6C0D0;
    --gray-700: #CBD5E1;
    --gray-800: #E2E8F0;
    --gray-900: #F1F5F9;

    --shadow-sm: 0 1px 2px rgb(0 0 0 / .3);
    --shadow-md: 0 1px 2px rgb(0 0 0 / .3), 0 4px 12px rgb(0 0 0 / .25);
    --shadow-lg: 0 12px 28px -6px rgb(0 0 0 / .5);
    --shadow-xl: 0 24px 56px -12px rgb(0 0 0 / .7);

    --paper: #0A0F1E;
    --sheet: #101830;
    --line: #1C2744;
    --line-2: #2A3960;
    --text: #F1F5F9;
    --text-2: #94A3B8;
    --link: #B6C0D0;
    --brand-soft: rgb(96 165 250 / .12);
    --indigo-soft: rgb(129 140 248 / .12);

    --footer-bg: linear-gradient(135deg, #060B1C 0%, #0B1633 100%);

    --tone: #60A5FA;
    --tone-soft: rgb(96 165 250 / .12);
}

/* ---------- TONES: xanh dương & chàm xen kẽ ---------- */

.category-card[data-category="paper"],
.category-card[data-category="sports"],
.category-card[data-category="international"],
.category-card[data-category="other"],
.link-tile:nth-child(odd),
.process-flow-step:nth-of-type(1),
.process-flow-step:nth-of-type(5),
.hero-right .stat-item:nth-child(odd) {
    --tone: #2563EB;
    --tone-soft: #E3EDFE;
}

.category-card[data-category="competition"],
.category-card[data-category="activity"],
.category-card[data-category="scholarship"],
.category-card[data-category="startup"],
.link-tile:nth-child(even),
.process-flow-step:nth-of-type(3),
.hero-right .stat-item:nth-child(even) {
    --tone: #4F46E5;
    --tone-soft: #E8EAFF;
}

:root[data-theme="dark"] .category-card[data-category="paper"],
:root[data-theme="dark"] .category-card[data-category="sports"],
:root[data-theme="dark"] .category-card[data-category="international"],
:root[data-theme="dark"] .category-card[data-category="other"],
:root[data-theme="dark"] .link-tile:nth-child(odd),
:root[data-theme="dark"] .process-flow-step:nth-of-type(1),
:root[data-theme="dark"] .process-flow-step:nth-of-type(5),
:root[data-theme="dark"] .hero-right .stat-item:nth-child(odd) {
    --tone: #60A5FA;
    --tone-soft: rgb(96 165 250 / .12);
}

:root[data-theme="dark"] .category-card[data-category="competition"],
:root[data-theme="dark"] .category-card[data-category="activity"],
:root[data-theme="dark"] .category-card[data-category="scholarship"],
:root[data-theme="dark"] .category-card[data-category="startup"],
:root[data-theme="dark"] .link-tile:nth-child(even),
:root[data-theme="dark"] .process-flow-step:nth-of-type(3),
:root[data-theme="dark"] .hero-right .stat-item:nth-child(even) {
    --tone: #818CF8;
    --tone-soft: rgb(129 140 248 / .12);
}

/* Ô icon: nền tint nhạt + icon màu, viền mảnh cùng tông */
.card-icon,
.link-tile-icon,
.process-flow-icon,
.hero-right .stat-icon {
    background: var(--tone-soft);
    color: var(--tone);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--tone) 14%, transparent);
    transition: background .2s ease, color .2s ease, transform .2s ease;
}

/* ---------- Base ---------- */

body {
    font-family: 'Nunito', 'Be Vietnam Pro', system-ui, sans-serif;
    background: var(--paper);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

/* <button> mặc định không kế thừa font trang (trình duyệt dùng Arial) —
   Arial không có sẵn độ đậm 800 nên chữ bị tự làm đậm giả, dấu tiếng
   Việt lệch/vỡ. Ép mọi nút dùng font của trang. */
button,
.btn {
    font-family: inherit;
}

::selection {
    background: color-mix(in srgb, var(--primary) 22%, transparent);
    color: var(--text);
}

:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* ---------- Header ---------- */

.header {
    background: color-mix(in srgb, var(--sheet) 85%, transparent);
    -webkit-backdrop-filter: saturate(1.4) blur(10px);
    backdrop-filter: saturate(1.4) blur(10px);
    color: var(--text);
    box-shadow: none;
    border-bottom: 1px solid var(--line);
}

.brand-logo-full {
    background: transparent;
    box-shadow: none;
    padding: 2px 0;
}

/* Logo có chữ tối — ở chế độ tối đặt lại vào khung sáng */
:root[data-theme="dark"] .brand-logo-full {
    background: #ffffff;
    padding: 5px 12px;
    border-radius: var(--radius-md);
}

.nav-breadcrumb a {
    color: var(--link);
    font-weight: 600;
    border-radius: var(--radius-sm);
    white-space: nowrap;
}

.nav-breadcrumb a:hover {
    color: var(--text);
    background: var(--gray-100);
}

.nav-breadcrumb a[aria-current="page"] {
    color: var(--primary-dark);
    background: var(--brand-soft);
    font-weight: 700;
}

:root[data-theme="dark"] .nav-breadcrumb a[aria-current="page"] {
    color: var(--primary);
}

/* Nút về website Khoa — nút phụ (tint), để không tranh với CTA chính */
.nav-home-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    height: 38px;
    padding: 0 14px;
    border-radius: var(--radius-md);
    background: var(--brand-soft);
    color: var(--primary-dark);
    font-size: .88rem;
    font-weight: 700;
    text-decoration: none;
    white-space: nowrap;
    transition: background .15s ease, color .15s ease;
}

.nav-home-btn:hover {
    background: var(--primary);
    color: #fff;
}

:root[data-theme="dark"] .nav-home-btn {
    color: var(--primary);
}

:root[data-theme="dark"] .nav-home-btn:hover {
    background: #2563EB;
    color: #fff;
}

.nav-home-btn svg {
    width: 17px;
    height: 17px;
    flex-shrink: 0;
}

/* Tablet: menu 5 mục + logo + 3 nút không đủ 1 hàng — đưa menu xuống hàng
   riêng bên dưới, nút Trang chủ Khoa thu gọn còn icon. */
@media (min-width: 769px) and (max-width: 1240px) {
    .header-top {
        flex-wrap: wrap;
        row-gap: 6px;
    }

    .nav-utilities {
        margin-left: auto;
    }

    .nav-breadcrumb {
        order: 3;
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 1240px) {
    .nav-home-btn {
        padding: 0 11px;
    }

    .nav-home-btn span {
        display: none;
    }
}

.nav-utility-btn {
    background: transparent;
    border: 1px solid var(--line);
    color: var(--gray-500);
    border-radius: var(--radius-md);
}

.nav-utility-btn:hover {
    background: var(--gray-100);
    color: var(--text);
    transform: none;
}

/* ---------- Buttons ---------- */

.btn {
    border-radius: var(--radius-md);
    font-weight: 700;
    letter-spacing: .01em;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: none;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 1px 2px rgb(15 23 42 / .08), inset 0 1px 0 rgb(255 255 255 / .12);
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
    box-shadow: 0 6px 16px -6px rgb(37 99 235 / .45);
}

:root[data-theme="dark"] .btn-primary {
    background: #2563EB;
    color: #fff;
}

:root[data-theme="dark"] .btn-primary:hover:not(:disabled) {
    background: #3B82F6;
}

.btn-secondary {
    background: var(--sheet);
    color: var(--text);
    border: 1px solid var(--line-2);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-50);
    border-color: var(--gray-300);
}

.btn-success,
.btn-danger {
    color: #fff;
}

.btn-link {
    color: var(--primary);
}

.btn-secondary .btn-spinner {
    border-color: var(--line-2);
    border-top-color: var(--primary);
}

.hero-cta-btn {
    animation: none;
}

/* Icon SVG trong nút/link (thay cho ký tự →, ←, ↑, ↻, ⬇, ✓) — cỡ theo chữ,
   nhích theo hướng mũi tên khi hover */
.i-arrow {
    width: 1.15em;
    height: 1.15em;
    flex-shrink: 0;
    vertical-align: -0.2em;
    transition: transform .2s ease;
}

:is(.btn, .back-link, .footer-top-link):hover .i-arrow-right { transform: translateX(3px); }
:is(.btn, .back-link, .footer-top-link):hover .i-arrow-left { transform: translateX(-3px); }
:is(.btn, .back-link, .footer-top-link):hover .i-arrow-up { transform: translateY(-2px); }

.back-link,
.footer-top-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* ---------- Inputs ---------- */

input,
textarea,
select {
    border: 1px solid var(--line-2);
    border-radius: var(--radius-md);
    background-color: var(--sheet);
    color: var(--text);
    box-shadow: var(--shadow-sm);
}

input:hover,
textarea:hover,
select:hover {
    border-color: var(--gray-400);
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 15%, transparent);
}

input::placeholder,
textarea::placeholder {
    color: var(--gray-400);
}

label {
    color: var(--gray-700);
    font-weight: 700;
}

input[type="checkbox"],
input[type="radio"] {
    accent-color: var(--primary);
    box-shadow: none;
}

select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%2364748B'%3E%3Cpath fill-rule='evenodd' d='M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z'/%3E%3C/svg%3E");
}

/* ---------- Nhãn nhỏ phía trên tiêu đề ---------- */

.hero-eyebrow {
    gap: 7px;
    font-size: .78rem;
    font-weight: 700;
    letter-spacing: 0;
    text-transform: none;
    color: var(--primary-dark);
    background: var(--brand-soft);
    border: 1px solid color-mix(in srgb, var(--primary) 14%, transparent);
    padding: 4px 12px;
}

:root[data-theme="dark"] .hero-eyebrow {
    color: var(--primary);
}

.hero-eyebrow-dot {
    width: 6px;
    height: 6px;
    background: var(--primary);
    box-shadow: none;
}

.hero-eyebrow-light {
    color: var(--secondary);
    background: var(--indigo-soft);
    border-color: color-mix(in srgb, var(--secondary) 14%, transparent);
}

.hero-eyebrow-light .hero-eyebrow-dot {
    background: var(--secondary);
}

/* ---------- Hero ---------- */

.hero::before,
.hero::after {
    display: none;
}

.hero-split {
    max-width: none;
    align-items: stretch;
    gap: var(--spacing-lg);
    padding: var(--spacing-md) 0 var(--spacing-lg);
}

.hero-left,
.hero-right {
    background: var(--sheet);
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-2xl) var(--spacing-xl);
}

/* Lớp xanh loang rất nhẹ ở góc — thêm sắc xanh mà không chói */
.hero-left {
    background:
        radial-gradient(70% 90% at 100% 0%, rgb(59 130 246 / .10), transparent 60%),
        linear-gradient(180deg, var(--sheet), var(--sheet));
}

.hero-right {
    justify-content: center;
    padding: var(--spacing-xl);
    background:
        radial-gradient(55% 45% at 50% 28%, rgb(59 130 246 / .14), transparent 70%),
        var(--sheet);
}

.hero h2,
.hero h2.hero-title-shimmer {
    font-weight: 800;
    letter-spacing: -.02em;
    line-height: 1.15;
    color: var(--text);
    background: none;
    -webkit-background-clip: border-box;
    background-clip: border-box;
    -webkit-text-fill-color: currentColor;
    animation: none;
    text-wrap: balance;
}

.hero h2 .hero-title-accent {
    color: var(--primary);
}

@media (min-width: 1025px) {
    .hero-split h2.hero-title-shimmer {
        font-size: 2.6rem;
        white-space: normal;
    }
}

.hero-desc {
    color: var(--text-2);
    font-size: 1.05rem;
    line-height: 1.7;
}

/* Trích dẫn: nền trung tính, gạch nhấn mảnh bên trái */
.hero-slogan {
    font-style: normal;
    font-weight: 600;
    color: var(--gray-700);
    background: var(--gray-50);
    border: 1px solid var(--line);
    border-left: 3px solid var(--primary);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: var(--spacing-md) var(--spacing-lg);
}

.hero-illustration {
    max-width: 230px;
}

/* Ô số liệu: nhãn nhỏ trên, số đậm dưới, icon tint bên phải */
.hero-right .stats-row {
    gap: 8px;
}

.hero-right .stat-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas: "label icon" "number icon";
    align-items: center;
    column-gap: var(--spacing-md);
    row-gap: 2px;
    background: var(--gray-50);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    box-shadow: none;
    padding: 12px 14px 12px 16px;
}

.hero-right .stat-item:hover {
    transform: none;
    background: var(--sheet);
    border-color: var(--line-2);
    box-shadow: none;
}

.hero-right .stat-label {
    grid-area: label;
    font-size: .8rem;
    color: var(--text-2);
}

.hero-right .stat-number {
    grid-area: number;
    font-size: 1.5rem;
    text-align: left;
    color: var(--text);
    font-variant-numeric: tabular-nums;
}

.hero-right .stat-icon {
    grid-area: icon;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
}

.hero-right .stat-icon svg {
    width: 19px;
    height: 19px;
}

.stat-number {
    font-weight: 800;
    color: var(--text);
}

/* ---------- Các khối nội dung = thẻ trắng viền mảnh ---------- */

.links-band,
.process-panel,
.category-zone {
    background: var(--sheet);
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    overflow: visible;
    padding: var(--spacing-2xl) var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

/* Khối "Kết nối với Khoa": nền gradient xanh nhạt, ô trắng nổi lên — mảng
   xanh chủ đạo giữa trang */
.links-band {
    background: linear-gradient(135deg, #E3EDFE 0%, #E8EAFF 100%);
    border-color: #D4E1FA;
}

:root[data-theme="dark"] .links-band {
    background: linear-gradient(135deg, rgb(37 99 235 / .16) 0%, rgb(79 70 229 / .16) 100%);
    border-color: var(--line-2);
}

.links-band::before,
.process-panel::before,
.category-zone::before {
    display: none;
}

.links-band-head,
.process-panel-head {
    text-align: left;
    max-width: none;
    margin: 0 0 var(--spacing-xl);
}

.links-band-head .hero-eyebrow,
.process-panel-head .hero-eyebrow {
    margin-bottom: var(--spacing-sm);
}

.links-band-head h3,
.process-panel-head h3 {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -.015em;
    color: var(--text);
    margin-bottom: 4px;
}

.process-panel-head p {
    color: var(--text-2);
    font-size: .98rem;
}

/* Liên kết */
.link-tile {
    position: relative;
    padding: var(--spacing-lg) var(--spacing-md);
    border-radius: var(--radius-lg);
    background: var(--sheet);
    border: 1px solid transparent;
    box-shadow: 0 1px 2px rgb(30 64 175 / .06), 0 6px 16px -8px rgb(30 64 175 / .15);
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}

.link-tile:hover {
    background: var(--sheet);
    border-color: color-mix(in srgb, var(--tone) 35%, var(--line));
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.link-tile-icon {
    position: relative;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
}

.link-tile:hover .link-tile-icon {
    background: var(--tone);
    color: #fff;
}

.link-tile-icon svg {
    width: 22px;
    height: 22px;
}

/* Huy hiệu Facebook nhỏ ở góc icon (các kênh Fanpage) */
.link-tile-badge {
    position: absolute;
    right: -5px;
    bottom: -5px;
    width: 18px;
    height: 18px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: #1877F2;
    color: #fff;
    border: 2px solid var(--sheet);
}

.link-tile-badge svg {
    width: 9px;
    height: 9px;
}

.link-tile h4 {
    font-size: .95rem;
    font-weight: 700;
    color: var(--text);
}

.link-tile p {
    font-size: .8rem;
    color: var(--text-2);
}

/* ---------- Quy trình ---------- */

.process-flow-step {
    background: var(--gray-50);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    box-shadow: none;
    padding: var(--spacing-xl) var(--spacing-lg);
}

.process-flow-step:hover {
    background: var(--sheet);
    border-color: var(--line-2);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.process-flow-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
}

.process-flow-icon svg {
    width: 24px;
    height: 24px;
}

.process-flow-badge {
    background: var(--tone);
    color: #fff;
    border: 2px solid var(--sheet);
    box-shadow: none;
    font-size: .7rem;
    font-weight: 800;
}

.process-flow-step h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text);
}

.process-flow-step p {
    color: var(--text-2);
}

.process-flow-arrow {
    color: var(--gray-300);
    padding-top: 64px;
}

/* ---------- Thẻ danh mục ---------- */

/* Thẻ kiểu "app tile": dải màu tông nhạt mờ dần từ đỉnh, icon trắng nổi
   trên dải màu, nút ↗ ở góc phải trên ngang hàng icon, gạch chân màu tông
   chạy ra ở đáy khi hover. */
.category-card {
    gap: 6px;
    padding: 22px 22px 24px;
    background:
        linear-gradient(180deg, color-mix(in srgb, var(--tone-soft) 85%, var(--sheet)) 0%, var(--sheet) 58%);
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}

.category-card::before {
    top: auto;
    bottom: 0;
    left: 22px;
    right: 22px;
    height: 3px;
    border-radius: 3px 3px 0 0;
    background: var(--tone);
    opacity: 1;
    transform: scaleX(0);
    transform-origin: center;
    transition: transform .3s var(--ease-out);
}

.category-card:hover {
    border-color: color-mix(in srgb, var(--tone) 30%, var(--line));
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.category-card:hover::before {
    transform: scaleX(1);
}

.card-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 12px;
    border-radius: var(--radius-lg);
    background: var(--sheet);
    color: var(--tone);
    box-shadow:
        inset 0 0 0 1px color-mix(in srgb, var(--tone) 18%, transparent),
        0 4px 10px -4px color-mix(in srgb, var(--tone) 35%, transparent);
}

.card-icon svg {
    width: 22px;
    height: 22px;
}

.category-card:hover .card-icon {
    background: var(--tone);
    color: #fff;
    transform: none;
}

.category-card h3 {
    min-height: 0;
    font-size: 1.05rem;
    font-weight: 800;
    letter-spacing: -.01em;
    color: var(--text);
}

.category-card p {
    min-height: 0;
    font-size: .86rem;
    line-height: 1.55;
    color: var(--text-2);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Nút "đi tới" ↗ — góc phải trên, ngang tâm icon */
.category-card .arrow {
    position: absolute;
    top: 29px;
    right: 22px;
    width: 34px;
    height: 34px;
    margin: 0;
    background: var(--sheet);
    color: var(--gray-500);
    border: 1px solid var(--line-2);
    box-shadow: none;
    transition: background .2s ease, color .2s ease, border-color .2s ease;
}

.arrow svg {
    width: 15px;
    height: 15px;
    transition: transform .2s ease;
}

.category-card:hover .arrow {
    background: var(--tone);
    border-color: var(--tone);
    color: #fff;
    transform: none;
}

.category-card:hover .arrow svg {
    transform: translate(1px, -1px);
}

.category-card[data-status="coming-soon"]::after {
    color: var(--text-2);
    background: var(--gray-100);
    border: 0;
    box-shadow: none;
}

/* ---------- Form pages ---------- */

.back-link {
    color: var(--text-2);
    font-weight: 700;
}

.back-link:hover {
    color: var(--primary);
}

.form-header h1 {
    font-weight: 800;
    letter-spacing: -.015em;
    color: var(--text);
}

.form-header p {
    color: var(--text-2);
}

.form-header-icon,
.upload-icon {
    color: var(--primary);
    background: var(--brand-soft);
    border-radius: var(--radius-lg);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--primary) 14%, transparent);
}

.section-head-icon {
    color: var(--primary);
    background: var(--brand-soft);
    border-radius: var(--radius-md);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--primary) 14%, transparent);
}

.form-panel {
    background: var(--sheet);
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.section-head {
    border-bottom-color: var(--line);
}

.section-head-title {
    font-weight: 800;
    color: var(--text);
}

.section-head-desc {
    color: var(--text-2);
}

.section-title {
    font-weight: 800;
    color: var(--text);
    border-bottom: 1px solid var(--line);
}

.form-buttons {
    border-top: 1px solid var(--line);
}

.process-step-number {
    background: var(--brand-soft);
    color: var(--primary-dark);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--primary) 16%, transparent);
}

:root[data-theme="dark"] .process-step-number {
    color: var(--primary);
}

.process-step-text {
    color: var(--text-2);
}

.process-step-text strong {
    color: var(--text);
}

/* Stepper */
.step:not(:last-child)::before {
    height: 2px;
    background: var(--line);
}

.step.completed:not(:last-child)::before {
    background: var(--primary);
}

.step-number {
    background: var(--sheet);
    color: var(--gray-500);
    border: 1px solid var(--line-2);
    box-shadow: 0 0 0 4px var(--paper);
}

.step.active .step-number {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary) 15%, var(--paper));
}

.step.completed .step-number {
    background: var(--brand-soft);
    color: var(--primary);
    border-color: color-mix(in srgb, var(--primary) 30%, transparent);
}

.step-label {
    color: var(--text-2);
}

.step.active .step-label {
    color: var(--text);
    font-weight: 700;
}

/* Upload / members */
.upload-area {
    border: 1.5px dashed var(--line-2);
    border-radius: var(--radius-lg);
    background: var(--gray-50);
}

.upload-area:hover,
.upload-area.drag-over {
    border-color: var(--primary);
    background: var(--brand-soft);
}

.upload-hint {
    color: var(--text-2);
}

.file-item {
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.member-item {
    background: var(--gray-50);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
}

.add-member-btn {
    background: transparent;
    border: 1.5px dashed var(--line-2);
    border-radius: var(--radius-lg);
    color: var(--primary);
}

.add-member-btn:hover {
    border-color: var(--primary);
    background: var(--brand-soft);
}

.member-remove {
    border-radius: var(--radius-md);
}

/* Alerts */
.alert {
    border-radius: var(--radius-md);
}

:root[data-theme="dark"] .alert-success,
:root[data-theme="dark"] .alert-error,
:root[data-theme="dark"] .alert-danger,
:root[data-theme="dark"] .alert-warning,
:root[data-theme="dark"] .alert-info {
    color: var(--text);
}

.badge {
    border-radius: 999px;
    font-weight: 700;
}

/* Success */
.success-section {
    background: var(--sheet);
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.success-section p {
    color: var(--text-2);
}

.submission-id {
    font-family: ui-monospace, 'Cascadia Mono', Consolas, monospace;
    color: var(--primary-dark);
    background: var(--brand-soft);
    border: 1px dashed color-mix(in srgb, var(--primary) 45%, transparent);
    border-radius: var(--radius-md);
}

.summary-table {
    background: var(--sheet);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
}

.summary-table td {
    border-bottom-color: var(--line);
    color: var(--text);
}

.summary-table td:first-child {
    color: var(--text-2);
}

/* Table (dashboard quản lý) */
.table-responsive {
    background: var(--sheet);
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.submission-table th {
    color: var(--gray-500);
    background: var(--gray-50);
}

.submission-table th,
.submission-table td {
    border-bottom-color: var(--line);
}

.submission-table tbody tr:hover {
    background: var(--gray-50);
}

/* ---------- Modals ---------- */

.modal-overlay,
.submitting-overlay {
    background: rgb(15 23 42 / .45);
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
}

.modal,
.submitting-box,
.letter-card {
    background: var(--sheet);
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.modal-header h3 svg {
    color: var(--primary);
}

.letter-card::before {
    height: 3px;
    background: var(--primary);
}

.letter-seal {
    background: var(--brand-soft);
    color: var(--primary);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--primary) 18%, transparent);
}

.letter-eyebrow {
    color: var(--primary);
    letter-spacing: .02em;
    text-transform: none;
}

.letter-title {
    font-weight: 800;
    color: var(--text);
}

.letter-body {
    color: var(--text-2);
}

.submitting-spinner {
    border-color: var(--line);
    border-top-color: var(--primary);
}

/* ---------- Splash ---------- */

.splash-screen {
    background: linear-gradient(135deg, #0B1B45 0%, #1E3A8A 100%);
}

.splash-logo {
    border-radius: var(--radius-xl);
}

.splash-eyebrow {
    background: rgb(255 255 255 / .08);
    border: 1px solid rgb(255 255 255 / .14);
    letter-spacing: 0;
    text-transform: none;
}

.splash-progress-bar {
    background: #60A5FA;
}

/* ---------- Footer: slate đậm trung tính ---------- */

.footer {
    background: var(--footer-bg);
}

.footer::before {
    display: none;
}

.footer-col {
    background: transparent;
    border: 0;
    border-radius: 0;
    padding: 0;
}

.footer-col-title {
    font-size: .92rem;
    text-transform: none;
    letter-spacing: 0;
    color: #F1F5F9;
}

.footer-col-icon {
    border-radius: var(--radius-sm);
    background: rgb(255 255 255 / .06);
    color: #93C5FD;
}

.footer-about-text {
    font-style: normal;
    font-size: .85rem;
    color: #AFC2E6;
}

.footer-about-logos {
    box-shadow: none;
}

.footer-links a {
    color: #DCE6F7;
}

.footer-links a:hover,
.footer a:hover,
.footer-top-link:hover {
    color: #fff;
}

.footer-content {
    border-bottom-color: rgb(255 255 255 / .08);
}

.footer-bottom p,
.footer-top-link {
    color: #9DB2DA;
}

#chuan-bi {
    scroll-margin-top: 96px;
}

/* ---------- Khối "Chuẩn bị gì để khai báo" + liên hệ ---------- */

.prep-panel {
    display: grid;
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: var(--spacing-xl);
    background: var(--sheet);
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-2xl) var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.prep-main h3 {
    margin: var(--spacing-sm) 0 4px;
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -.015em;
    color: var(--text);
}

.prep-desc {
    color: var(--text-2);
    font-size: .98rem;
    margin-bottom: var(--spacing-lg);
}

.prep-list {
    list-style: none;
    margin: 0 0 var(--spacing-lg);
    padding: 0;
    border-top: 1px solid var(--line);
}

.prep-list li {
    display: grid;
    grid-template-columns: 48px minmax(0, 1fr);
    align-items: start;
    gap: var(--spacing-md);
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
}

.prep-num {
    font-size: 1.35rem;
    font-weight: 800;
    line-height: 1.2;
    color: var(--primary);
    font-variant-numeric: tabular-nums;
}

.prep-list li:nth-child(even) .prep-num {
    color: var(--secondary);
}

.prep-list strong {
    display: block;
    font-weight: 700;
    color: var(--text);
}

.prep-list span:not(.prep-num) {
    display: block;
    margin-top: 2px;
    font-size: .9rem;
    color: var(--text-2);
}

.prep-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

/* Thẻ liên hệ: nền gradient xanh nhạt giống khối "Kết nối với Khoa" */
.prep-contact {
    align-self: start;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, #E3EDFE 0%, #E8EAFF 100%);
    border: 1px solid #D4E1FA;
}

:root[data-theme="dark"] .prep-contact {
    background: linear-gradient(135deg, rgb(37 99 235 / .16) 0%, rgb(79 70 229 / .16) 100%);
    border-color: var(--line-2);
}

.prep-contact h4 {
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--text);
}

.prep-contact > p {
    margin: 4px 0 var(--spacing-md);
    font-size: .9rem;
    color: var(--text-2);
}

.prep-contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    margin-top: 8px;
    border-radius: var(--radius-md);
    background: var(--sheet);
    text-decoration: none;
    box-shadow: 0 1px 2px rgb(30 64 175 / .06), 0 6px 16px -8px rgb(30 64 175 / .15);
    transition: transform .2s ease, box-shadow .2s ease;
}

.prep-contact-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.prep-contact-icon {
    display: grid;
    place-items: center;
    flex-shrink: 0;
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    background: var(--brand-soft);
    color: var(--primary);
}

.prep-contact-icon svg {
    width: 18px;
    height: 18px;
}

.prep-contact-item strong {
    display: block;
    font-size: .92rem;
    font-weight: 700;
    color: var(--text);
}

.prep-contact-item small {
    font-size: .82rem;
    color: var(--primary);
    word-break: break-all;
}

@media (max-width: 900px) {
    .prep-panel {
        grid-template-columns: minmax(0, 1fr);
    }
}

/* ===========================
   MICRO-INTERACTIONS (JS ở common.js: setupHeaderScrollState,
   setupScrollSpy, setupCardSpotlight, setupBackToTop)
   =========================== */

/* Header đổ bóng khi đã cuộn */
.header {
    transition: box-shadow .25s ease, background-color .25s ease;
}

.header.is-scrolled {
    background: color-mix(in srgb, var(--sheet) 94%, transparent);
    box-shadow: 0 8px 24px -16px rgb(15 23 42 / .25);
}

/* Menu: mục đang xem */
.nav-breadcrumb a.is-active {
    color: var(--primary-dark);
    background: var(--brand-soft);
    font-weight: 700;
}

:root[data-theme="dark"] .nav-breadcrumb a.is-active {
    color: var(--primary);
}

/* Thẻ nảy nhẹ (đàn hồi) khi hover */
.category-card,
.link-tile,
.process-flow-step,
.prep-contact-item {
    transition:
        border-color .2s ease,
        box-shadow .25s ease,
        transform .35s cubic-bezier(.34, 1.45, .5, 1),
        opacity .6s ease; /* giữ hiệu ứng hiện dần của [data-reveal="stagger"] */
}

/* Đèn rọi theo con trỏ: lớp sáng màu tông tại (--mx, --my) */
.category-card:hover,
.link-tile:hover,
.process-flow-step:hover {
    background-image:
        radial-gradient(260px circle at var(--mx, 50%) var(--my, 0%), color-mix(in srgb, var(--tone) 10%, transparent), transparent 65%),
        linear-gradient(180deg, color-mix(in srgb, var(--tone-soft) 85%, var(--sheet)) 0%, var(--sheet) 58%);
}

.link-tile:hover,
.process-flow-step:hover {
    background-image:
        radial-gradient(260px circle at var(--mx, 50%) var(--my, 0%), color-mix(in srgb, var(--tone) 10%, transparent), transparent 65%);
}

/* Link nhanh ở góc phải tiêu đề khối */
.process-panel-head {
    position: relative;
}

.section-more {
    position: absolute;
    right: 0;
    bottom: 2px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 4px 6px 12px;
    border-radius: var(--radius-sm);
    font-size: .9rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    transition: background .15s ease;
}

.section-more:hover {
    background: var(--brand-soft);
}

.section-more:hover .i-arrow-right {
    transform: translateX(3px);
}

@media (max-width: 768px) {
    .section-more {
        position: static;
        margin-top: 8px;
        padding-left: 0;
    }
}

/* Nút lên đầu trang nổi */
.back-to-top {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 900;
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border: 1px solid var(--line);
    border-radius: 50%;
    background: var(--sheet);
    color: var(--primary);
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: opacity .25s ease, transform .25s ease, visibility .25s, background .15s ease, color .15s ease;
}

.back-to-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: none;
}

.back-to-top:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.back-to-top svg {
    width: 20px;
    height: 20px;
}

@media (prefers-reduced-motion: no-preference) {
    /* Cúp bồng bềnh + sao/confetti lấp lánh */
    .hero-illustration {
        animation: heroFloat 6s ease-in-out infinite;
    }

    .hero-illustration .tw {
        transform-box: fill-box;
        transform-origin: center;
        animation: heroTwinkle 3.2s ease-in-out infinite;
    }

    .hero-illustration .tw:nth-of-type(3n) { animation-delay: -1.1s; }
    .hero-illustration .tw:nth-of-type(3n+1) { animation-delay: -2.2s; }
    .hero-illustration .tw:nth-of-type(4n) { animation-duration: 4s; }

    /* Mũi tên giữa các bước quy trình dẫn mắt người xem */
    .process-flow-arrow svg {
        color: color-mix(in srgb, var(--primary) 45%, var(--gray-300));
        animation: flowNudgeX 1.8s ease-in-out infinite; /* khung mũi tên đã xoay 90° ở màn hình hẹp nên tự thành nhích dọc */
    }
}

@keyframes heroFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

@keyframes heroTwinkle {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: .35; transform: scale(.7); }
}

@keyframes flowNudgeX {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(4px); }
}