/* public/assets/css/navbar.css — bốc từ 2 khối <style> inline của templates/navbar.php (04/09/2026).
   VÌ SAO: 49,5KB + 7KB CSS inline nằm trong MỌI trang HTML ⇒ không cache được, mỗi lượt xem tải lại
   (~12KB brotli) và parser HTML phải nhai qua. Ra file riêng thì trình duyệt cache 1 tuần.
   Màu/biến dùng var(--hsk-*) do header.php in inline nên tách ra vẫn đúng. Sửa CSS navbar: sửa Ở ĐÂY. */

/* ═══════════════════════════════════════════
   NAVBAR v5.0 — design-token aligned
═══════════════════════════════════════════ */
:root {
    --nav-h: 64px;
}

/* ── Base ─────────────────────────────────── */
#hsk-navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    height: var(--nav-h);
    background: color-mix(in srgb, var(--color-surface) 97%, transparent);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--color-border);
    transition: box-shadow var(--dur-base) var(--ease);
    font-family: var(--font-sans);
}
#hsk-navbar.scrolled {
    background: var(--color-surface);
    box-shadow: 0 1px 0 var(--color-border), var(--shadow-sm);
}
.nav-inner {
    max-width: 1440px; margin: 0 auto; padding: 0 28px;
    height: 100%; display: flex; align-items: center;
}

/* ── Logo ─────────────────────────────────── */
.nav-logo {
    display: flex; align-items: center; text-decoration: none;
    flex-shrink: 0; margin-right: 36px;
}
.nav-logo img {
    height: 48px; width: auto; max-width: 220px; display: block; transition: opacity .2s;
}
.nav-logo img:hover { opacity: .85; }
.nav-logo-fallback {
    display: flex; align-items: center; gap: 9px;
    font-size: 1.2rem; font-weight: var(--fw-extrabold); color: var(--color-ink);
    letter-spacing: -.4px; white-space: nowrap;
}
.nav-logo-icon {
    display: inline-flex; align-items: center; justify-content: center;
    width: 34px; height: 34px; border-radius: var(--radius-md);
    background: var(--color-primary); color: var(--color-on-dark);
    font-size: 13px; font-weight: var(--fw-extrabold); flex-shrink: 0;
}

/* ── Desktop nav links ─────────────────────── */
.nav-links {
    display: flex; align-items: center; gap: 2px;
    list-style: none; margin: 0; padding: 0; flex: 1;
}
.nl-item { position: relative; }
.nl-link {
    display: flex; align-items: center; gap: 5px;
    padding: 8px 13px; border-radius: var(--radius-md);
    font-size: 15px; font-weight: var(--fw-semibold);
    color: var(--color-text); text-decoration: none;
    transition: color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
    white-space: nowrap; cursor: pointer; background: none; border: none;
    font-family: var(--font-sans); letter-spacing: -.01em;
}
.nl-link:hover { color: var(--color-primary); background: var(--color-primary-soft); }
.nl-link.active { color: var(--color-primary); background: var(--color-primary-soft); font-weight: var(--fw-bold); }
.nl-link .nl-chevron {
    font-size: 9px; color: var(--color-muted); transition: transform .2s; margin-left: 1px;
}
.nl-item:hover .nl-chevron { transform: rotate(180deg); }

/* ── "Sắp ra mắt" badge for nav items WIP ── */
.nl-link .nl-soon {
    display: inline-flex; align-items: center; justify-content: center;
    width: 18px; height: 18px;
    margin-left: 4px;
    background: var(--color-warning-soft);
    color: var(--color-warning-deep);
    border-radius: 6px;
    font-size: 9px;
    line-height: 1;
}
.nl-link .nl-soon i { font-size: 10px; }

/* ── Dropdown panel ────────────────────────── */
.nl-dropdown { position: relative; }
.nl-dd-panel {
    position: absolute; top: calc(100% + 8px); left: 50%;
    transform: translateX(-50%) translateY(6px) scale(.97);
    min-width: 288px; background: var(--color-surface);
    border: 1px solid var(--color-border); border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--space-2); z-index: 300;
    opacity: 0; visibility: hidden;
    transition: opacity .18s var(--ease), transform .18s var(--ease), visibility .18s;
    pointer-events: none;
}
.nl-dropdown::after {
    content: ''; position: absolute; top: 100%; left: 0; right: 0; height: 10px;
}
.nl-dropdown:hover .nl-dd-panel,
.nl-dd-panel:hover {
    opacity: 1; visibility: visible;
    transform: translateX(-50%) translateY(0) scale(1);
    pointer-events: auto;
}

/* Dropdown items */
.nl-dd-label {
    font-size: 10px; font-weight: var(--fw-extrabold); color: var(--color-muted);
    text-transform: uppercase; letter-spacing: .08em; padding: 8px 10px 4px;
}
.nl-dd-row {
    display: flex; align-items: center; gap: 10px;
    padding: 9px 10px; border-radius: var(--radius-md);
    text-decoration: none; color: var(--color-ink);
    transition: background var(--dur-fast) var(--ease);
    font-size: 13.5px; font-weight: var(--fw-semibold); position: relative;
}
.nl-dd-row:hover { background: var(--color-soft); }
.nl-dd-row.active { background: var(--color-primary-soft); color: var(--color-primary); }
.nl-dd-icon {
    width: 32px; height: 32px; border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    font-size: 13px; flex-shrink: 0;
}
.nl-dd-row .nl-dd-meta { flex: 1; min-width: 0; }
.nl-dd-row .nl-dd-title { font-size: 13.5px; font-weight: var(--fw-bold); line-height: 1.2; }
.nl-dd-row .nl-dd-sub   { font-size: 11.5px; color: var(--color-muted); font-weight: var(--fw-medium); margin-top: 1px; }

/* Locked */
.nl-dd-row.locked { color: var(--color-locked); cursor: default; pointer-events: none; }
.nl-dd-row.locked .nl-dd-icon { background: var(--color-soft) !important; color: var(--color-locked); }
.nl-dd-row.locked .nl-dd-sub  { color: var(--color-locked); }
.nl-dd-lock-badge {
    display: inline-flex; align-items: center; gap: 3px;
    font-size: 10.5px; font-weight: var(--fw-bold); color: var(--color-locked);
    background: var(--color-soft); border-radius: var(--radius-sm); padding: 2px 7px;
    flex-shrink: 0;
}
.nl-dd-upgrade {
    display: inline-flex; align-items: center; gap: 3px;
    font-size: 10.5px; font-weight: var(--fw-extrabold); color: var(--color-primary);
    background: var(--color-primary-soft); border-radius: var(--radius-sm); padding: 2px 8px;
    flex-shrink: 0; text-decoration: none; pointer-events: auto;
}
.nl-dd-upgrade:hover { background: color-mix(in srgb, var(--color-primary) 18%, transparent); }
.nl-dd-sep { border: none; border-top: 1px solid var(--color-line); margin: var(--space-1) 0; }
.nl-dd-footer {
    display: flex; align-items: center; gap: 7px;
    padding: 9px 10px; border-radius: var(--radius-md);
    font-size: 13px; font-weight: var(--fw-semibold);
    color: var(--color-primary); text-decoration: none;
    transition: background var(--dur-fast) var(--ease);
}
.nl-dd-footer:hover { background: var(--color-primary-soft); }

/* ── Right actions ─────────────────────────── */
.nav-actions {
    display: flex; align-items: center; gap: 6px; margin-left: auto;
    /* Cụm hành động (Đăng nhập + CTA) KHÔNG được co lại: ở 1280px nút "Bắt đầu miễn phí"
       từng bị đẩy tràn ra ngoài mép phải, mất chữ. Ô tìm kiếm co thay (nó có min-width:0). */
    flex-shrink: 0;
}

/* Icon buttons */
.nav-icon-btn {
    display: flex; align-items: center; justify-content: center;
    width: 36px; height: 36px; border-radius: var(--radius-md);
    color: var(--color-muted); text-decoration: none; border: none; background: none;
    cursor: pointer; transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
    font-size: 15px;
}
.nav-icon-btn:hover { background: var(--color-soft); color: var(--color-ink); }

/* Streak chip — amber warm */
.nav-streak-chip {
    display: flex; align-items: center; gap: 4px;
    background: color-mix(in srgb, var(--color-warning) 11%, var(--color-surface));
    border: 1.5px solid color-mix(in srgb, var(--color-warning) 32%, transparent);
    border-radius: var(--radius-pill);
    padding: 4px 10px; font-size: 12px; font-weight: var(--fw-extrabold);
    color: var(--color-warning); white-space: nowrap;
}

/* Plan chip */
.nav-plan-chip {
    display: flex; align-items: center; gap: 5px;
    padding: 5px 12px; border-radius: var(--radius-md);
    font-size: 12px; font-weight: var(--fw-extrabold);
    text-decoration: none; transition: opacity var(--dur-fast) var(--ease);
    white-space: nowrap; flex-shrink: 0;
}
.nav-plan-chip:hover { opacity: .82; }
.nav-plan-chip.free       { background: var(--color-soft); color: var(--color-muted); border: 1px solid var(--color-border); }
.nav-plan-chip.foundation { background: color-mix(in srgb, var(--color-secondary) 12%, var(--color-surface)); color: var(--color-secondary); border: 1px solid color-mix(in srgb, var(--color-secondary) 30%, transparent); }
.nav-plan-chip.shadowing  { background: color-mix(in srgb, var(--color-warning) 12%, var(--color-surface)); color: var(--color-warning); border: 1px solid color-mix(in srgb, var(--color-warning) 30%, transparent); }
.nav-plan-chip.plus       { background: var(--color-primary-soft); color: var(--color-primary); border: 1px solid color-mix(in srgb, var(--color-primary) 25%, transparent); }
.nav-plan-chip.premium    { background: color-mix(in srgb, var(--color-accent) 10%, var(--color-surface)); color: var(--color-accent); border: 1px solid color-mix(in srgb, var(--color-accent) 28%, transparent); }

/* Notification bell */
.nav-bell-wrapper { position: relative; display: flex; align-items: center; }
.nav-bell {
    display: flex; align-items: center; justify-content: center;
    width: 36px; height: 36px; border-radius: var(--radius-md);
    color: var(--color-muted); font-size: 15px; cursor: pointer;
    transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.nav-bell:hover { background: var(--color-soft); color: var(--color-ink); }
.nav-bell-badge {
    position: absolute; top: 0; right: 0;
    background: var(--color-warning); color: var(--color-on-dark); font-size: 9px; font-weight: var(--fw-extrabold);
    min-width: 15px; height: 15px; border-radius: var(--radius-pill);
    display: flex; align-items: center; justify-content: center;
    padding: 0 3px; box-shadow: 0 0 0 2px var(--color-surface); z-index: 10;
}

/* Thin divider between action groups */
.nav-actions-sep {
    width: 1px; height: 20px;
    background: var(--color-border);
    flex-shrink: 0; margin: 0 2px;
}

/* Cart (legacy compat) */
.cart-dd-wrap { position: relative; }
.cart-dd-wrap::after { content: ''; position: absolute; top: 100%; right: 0; width: 340px; height: 12px; background: transparent; }
.nav-cart {
    position: relative; display: flex; align-items: center; justify-content: center;
    width: 36px; height: 36px; border-radius: var(--radius-md);
    color: var(--color-muted); text-decoration: none; transition: .15s; font-size: 16px;
}
.nav-cart:hover { background: var(--color-soft); color: var(--color-ink); }
.nav-cart-badge {
    position: absolute; top: 1px; right: 1px;
    min-width: 17px; height: 17px; padding: 0 4px;
    background: var(--color-primary); color: var(--color-on-dark);
    border: 2px solid var(--color-surface); border-radius: var(--radius-pill);
    font-size: 10px; font-weight: var(--fw-bold); line-height: 1;
    display: flex; align-items: center; justify-content: center;
    font-variant-numeric: tabular-nums; box-shadow: var(--shadow-sm);
}
.cart-dd-panel {
    position: absolute; top: calc(100% + 12px); right: -8px; width: 340px;
    background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg);
    opacity: 0; visibility: hidden; transform: translateY(6px) scale(.97);
    transition: all .2s var(--ease); z-index: 200; pointer-events: none;
}
.cart-dd-wrap:hover .cart-dd-panel { opacity: 1; visibility: visible; transform: translateY(0) scale(1); pointer-events: auto; }

/* User button */
.nav-user-wrap { position: relative; }
.nav-user-btn {
    display: flex; align-items: center; gap: 8px;
    padding: 5px 11px 5px 5px;
    background: var(--color-soft); border: 1px solid var(--color-border);
    border-radius: var(--radius-md); cursor: pointer;
    transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
    font-family: var(--font-sans); font-size: 13.5px; font-weight: var(--fw-semibold); color: var(--color-ink);
}
.nav-user-btn:hover { background: var(--color-bg); border-color: var(--color-muted); }
.nav-user-avatar {
    width: 28px; height: 28px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0;
}
.nav-user-name { max-width: 110px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nav-user-dd {
    position: absolute; top: calc(100% + 8px); right: 0;
    width: 224px; background: var(--color-surface);
    border: 1px solid var(--color-border); border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md); padding: var(--space-2); z-index: 300;
    opacity: 0; visibility: hidden; transform: translateY(6px);
    transition: all .18s var(--ease);
}
/* Chỉ hiện bằng hover trên thiết bị có chuột thật — touch dùng .active (JS toggle)
   để bấm lần 2 ẩn được (tránh sticky-hover trên mobile) */
@media (hover: hover) {
    .nav-user-wrap:hover .nav-user-dd { opacity: 1; visibility: visible; transform: translateY(0); }
}
.nav-dd-item {
    display: flex; align-items: center; gap: 9px;
    padding: 9px 10px; border-radius: var(--radius-md);
    font-size: 13.5px; font-weight: var(--fw-semibold); color: var(--color-text);
    text-decoration: none; transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.nav-dd-item:hover { background: var(--color-primary-soft); color: var(--color-primary); }
.nav-dd-item .ddi-icon { width: 18px; text-align: center; color: var(--color-muted); font-size: 14px; flex-shrink: 0; transition: color var(--dur-fast) var(--ease); }
.nav-dd-item:hover .ddi-icon { color: var(--color-primary); }
.nav-dd-item.danger { color: var(--color-warning); }
.nav-dd-item.danger .ddi-icon { color: var(--color-warning); }
.nav-dd-item.danger:hover { background: color-mix(in srgb, var(--color-warning) 9%, var(--color-surface)); color: var(--color-warning); }
.nav-dd-item.danger:hover .ddi-icon { color: var(--color-warning); }
.nav-dd-item.upgrade { color: var(--color-primary); font-weight: var(--fw-bold); }
.nav-dd-item.upgrade .ddi-icon { color: var(--color-primary); }
/* XP header trong dropdown */
.nav-dd-xp { display: block; padding: 10px 10px 11px; border-radius: var(--radius-md); background: var(--color-soft); text-decoration: none; margin-bottom: var(--space-1); transition: background var(--dur-fast) var(--ease); }
.nav-dd-xp:hover { background: var(--color-primary-soft); }
.nav-dd-xp__top { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; margin-bottom: 7px; }
.nav-dd-xp__lv { font-size: 13px; font-weight: var(--fw-extrabold); color: var(--color-ink); }
.nav-dd-xp__lv i { color: var(--color-primary); margin-right: 4px; }
.nav-dd-xp__pts { font-size: 11.5px; font-weight: var(--fw-bold); color: var(--color-primary); flex-shrink: 0; }
.nav-dd-xp__bar { display: block; height: 5px; border-radius: var(--radius-pill); background: var(--color-line); overflow: hidden; }
.nav-dd-xp__fill { display: block; height: 100%; border-radius: var(--radius-pill); background: var(--color-primary); }
.nav-dd-xp__next { display: block; font-size: 10.5px; color: var(--color-muted); margin-top: 6px; font-weight: var(--fw-semibold); }
.nav-dd-item.upgrade:hover { background: var(--color-ink); color: var(--color-on-dark); }
.nav-dd-item.upgrade:hover .ddi-icon { color: var(--color-accent); }
.nav-dd-divider { border: none; border-top: 1px solid var(--color-line); margin: var(--space-1) 0; }

/* Guest auth */
.nav-login-link {
    font-size: 13.5px; font-weight: var(--fw-semibold); color: var(--color-text);
    text-decoration: none; padding: 8px 14px; border-radius: var(--radius-md); transition: .15s;
}
.nav-login-link:hover { color: var(--color-ink); background: var(--color-soft); }
.nav-register-btn {
    display: flex; align-items: center; gap: 6px;
    background: var(--color-primary); color: var(--color-on-dark);
    font-size: 13px; font-weight: var(--fw-bold); padding: 8px 18px; border-radius: var(--radius-md);
    text-decoration: none; transition: .2s;
    box-shadow: 0 2px 8px -2px color-mix(in srgb, var(--color-primary) 40%, transparent);
    /* Không có 2 dòng này thì ở 1280px nút CTA chính bị bẻ thành 3 dòng
       ("Bắt đầu / → miễn / phí") — trông như giao diện vỡ, ngay cạnh logo. */
    white-space: nowrap; flex-shrink: 0;
}
.nav-login-link { white-space: nowrap; }
.nav-register-btn:hover { background: var(--color-primary-hover); color: var(--color-on-dark); }

/* ── Hamburger ─────────────────────────────── */
.nav-hamburger {
    display: none; width: 38px; height: 38px; border: none;
    background: none; cursor: pointer; flex-direction: column;
    align-items: center; justify-content: center; gap: 5px;
    border-radius: var(--radius-md); transition: background var(--dur-fast) var(--ease);
    flex-shrink: 0; margin-left: 4px;
    -webkit-tap-highlight-color: transparent; touch-action: manipulation;
}
.nav-hamburger:hover { background: var(--color-soft); }
.nav-hamburger span {
    display: block; width: 20px; height: 2px;
    background: var(--color-text); border-radius: 2px;
    transition: all .25s var(--ease); transform-origin: center;
}
#hsk-navbar.menu-open .nav-hamburger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
#hsk-navbar.menu-open .nav-hamburger span:nth-child(2) { opacity: 0; transform: scaleX(0); }
#hsk-navbar.menu-open .nav-hamburger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Mobile overlay ────────────────────────── */
.nav-overlay {
    display: none; position: fixed; inset: 0; z-index: 998;
    background: rgba(15,23,42,.55); backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    opacity: 0; transition: opacity .28s; pointer-events: none;
}
.nav-overlay.visible { opacity: 1; pointer-events: auto; }

/* ── Mobile panel ──────────────────────────── */
.nav-mobile-panel {
    display: none; position: fixed;
    top: var(--nav-h); left: 0; right: 0; z-index: 999;
    background: var(--color-surface); border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    padding: var(--space-3) 14px var(--space-5);
    transform: translateY(-12px); opacity: 0;
    transition: transform .28s var(--ease), opacity .28s;
    max-height: calc(100vh - var(--nav-h)); overflow-y: auto;
    pointer-events: none;
}
.nav-mobile-panel.open { transform: translateY(0); opacity: 1; pointer-events: auto; }

/* Mobile nav items */
.mob-section-label {
    font-size: 10px; font-weight: var(--fw-extrabold); color: var(--color-muted);
    text-transform: uppercase; letter-spacing: .08em; padding: 6px 8px 4px;
}
.mob-nav-links { list-style: none; padding: 0; margin: 0 0 6px; }
.mob-nav-links li + li { border-top: 1px solid var(--color-bg); }
.mob-nl-link {
    display: flex; align-items: center; gap: 11px;
    padding: 10px 8px; font-size: 14px; font-weight: var(--fw-semibold);
    color: var(--color-ink); text-decoration: none; border-radius: var(--radius-md);
    transition: .15s; font-family: var(--font-sans);
}
.mob-nl-link:hover, .mob-nl-link.active { color: var(--color-primary); background: var(--color-primary-soft); }
.mob-nl-link .mob-nl-soon {
    margin-left: auto;
    display: inline-flex; align-items: center; gap: 5px;
    padding: 3px 8px;
    background: var(--color-warning-soft);
    color: var(--color-warning-deep);
    border-radius: var(--radius-pill);
    font-size: 10.5px; font-weight: var(--fw-bold);
    text-transform: uppercase; letter-spacing: .04em;
}
.mob-nl-link .mob-nl-soon i { font-size: 10px; }
.mob-nl-icon {
    width: 30px; height: 30px; border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    font-size: 13px; flex-shrink: 0; background: var(--color-soft); color: var(--color-muted);
}
.mob-nl-link.active .mob-nl-icon { background: var(--color-primary-soft); color: var(--color-primary); }

/* Mobile accordion */
.mob-accordion-trigger {
    display: flex; align-items: center; gap: 11px;
    padding: 10px 8px; font-size: 14px; font-weight: var(--fw-semibold);
    color: var(--color-ink); width: 100%; background: none; border: none;
    border-radius: var(--radius-md); cursor: pointer; transition: .15s;
    font-family: var(--font-sans); text-align: left;
}
.mob-accordion-trigger:hover { background: var(--color-soft); }
.mob-accordion-trigger.open { color: var(--color-primary); background: var(--color-primary-soft); }
.mob-accordion-trigger .mob-nl-icon { background: var(--color-soft); color: var(--color-muted); }
.mob-accordion-trigger.open .mob-nl-icon { background: var(--color-primary-soft); color: var(--color-primary); }
.mob-acc-chevron { margin-left: auto; font-size: 10px; color: var(--color-muted); transition: transform .2s; }
.mob-accordion-trigger.open .mob-acc-chevron { transform: rotate(180deg); }
.mob-accordion-body {
    overflow: hidden; max-height: 0; transition: max-height .3s var(--ease); padding-left: 18px;
}
.mob-accordion-body.open { max-height: 400px; }
.mob-module-row {
    display: flex; align-items: center; gap: 10px;
    padding: 9px 8px; border-radius: var(--radius-md);
    font-size: 13.5px; font-weight: var(--fw-semibold); color: var(--color-text);
    text-decoration: none; transition: .12s;
    border-top: 1px solid var(--color-bg);
}
.mob-module-row:first-child { border-top: none; }
.mob-module-row:hover:not(.locked) { background: var(--color-soft); }
.mob-module-icon {
    width: 26px; height: 26px; border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    font-size: 12px; flex-shrink: 0;
}
.mob-module-row.locked { color: var(--color-locked); pointer-events: none; }
.mob-module-row.locked .mob-module-icon { background: var(--color-soft); color: var(--color-locked); }
.mob-lock-chip {
    margin-left: auto; font-size: 10px; font-weight: var(--fw-bold);
    color: var(--color-locked); background: var(--color-soft); border-radius: var(--radius-sm); padding: 2px 6px;
}

/* Mobile user block */
.mob-user-block {
    display: flex; align-items: center; justify-content: space-between;
    padding: 10px 12px; background: var(--color-soft);
    border: 1px solid var(--color-border); border-radius: var(--radius-lg);
    margin-bottom: 10px; gap: 10px;
}
.mob-user-info { display: flex; align-items: center; gap: 10px; min-width: 0; flex: 1; }
.mob-user-info > img { width: 36px; height: 36px; border-radius: var(--radius-md); }
.mob-user-name { font-size: 13.5px; font-weight: var(--fw-extrabold); color: var(--color-ink); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mob-plan-badge {
    font-size: 10px; font-weight: var(--fw-extrabold); border-radius: var(--radius-sm); padding: 2px 6px;
    display: inline-block; margin-top: 2px;
}
.mob-plan-badge.free       { background: var(--color-soft); color: var(--color-muted); }
.mob-plan-badge.foundation { background: color-mix(in srgb, var(--color-secondary) 14%, var(--color-surface)); color: var(--color-secondary); }
.mob-plan-badge.shadowing  { background: color-mix(in srgb, var(--color-warning) 14%, var(--color-surface)); color: var(--color-warning); }
.mob-plan-badge.plus       { background: var(--color-primary-soft); color: var(--color-primary); }
.mob-plan-badge.premium    { background: color-mix(in srgb, var(--color-accent) 12%, var(--color-surface)); color: var(--color-accent); }

/* Mobile auth */
.mob-auth-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 12px; }
.mob-btn {
    display: flex; align-items: center; justify-content: center; gap: 7px;
    padding: 12px; border-radius: var(--radius-md); font-weight: var(--fw-bold); font-size: 13.5px;
    text-decoration: none; transition: .15s;
}
.mob-btn-login    { background: var(--color-soft); color: var(--color-text); border: 1.5px solid var(--color-border); }
.mob-btn-login:hover  { background: var(--color-bg); }
.mob-btn-register { background: var(--color-primary); color: var(--color-on-dark); box-shadow: 0 3px 12px -3px color-mix(in srgb, var(--color-primary) 45%, transparent); }
.mob-btn-register:hover { background: var(--color-primary-hover); color: var(--color-on-dark); }

.mob-divider { border: none; border-top: 1px solid var(--color-line); margin: 10px 0; }

/* Mobile cart (legacy) */
.mob-cart-btn {
    display: none; position: relative; width: 40px; height: 40px;
    border-radius: var(--radius-md); align-items: center; justify-content: center;
    color: var(--color-muted); text-decoration: none; font-size: 16px;
    -webkit-tap-highlight-color: transparent; touch-action: manipulation; transition: background .15s;
}
.mob-cart-btn:active { background: var(--color-soft); }

/* ── Responsive ─────────────────────────────── */
@media (max-width: 991px) {
    :root { --nav-h: 56px; }
    .nav-links, .nav-login-link, .nav-register-btn { display: none !important; }
    .nav-hamburger  { display: flex; }
    .nav-overlay, .nav-mobile-panel { display: block; pointer-events: none; }
    .nav-streak-chip{ display: none !important; }
    .nav-plan-chip  { display: none !important; }
    .nav-actions-sep { display: none !important; }
    .nav-icon-btn   { display: none !important; }
    .cart-dd-wrap   { display: none !important; }
    .mob-cart-btn   { display: flex; }
    .nav-inner { padding: 0 6px; position: relative; }

    /* Logo — gọn lại để không lấn icons bên phải */
    #nav-logo-img {
        height: 32px !important;
        max-width: 130px !important;
        object-fit: contain;
    }

    /* Hamburger LEFT — absolute, lighter weight */
    .nav-hamburger {
        position: absolute !important;
        left: 4px; top: 50%; transform: translateY(-50%);
        width: 40px; height: 40px;
        margin: 0 !important;
        border-radius: 8px;
    }
    .nav-hamburger span { width: 17px; height: 1.8px; }
    .nav-hamburger:hover { background: var(--color-soft); }

    /* Logo absolute-centered — shift xa khỏi hamburger 1 chút */
    .nav-logo {
        position: absolute;
        left: calc(50% - 8px); top: 50%;
        transform: translate(-50%, -50%);
        margin: 0;
        pointer-events: auto;
        max-width: 130px;
    }

    /* Right actions — gap đều, compact */
    .nav-actions { position: relative; z-index: 2; gap: 2px; padding-right: 4px; }
    .nav-search-mobile {
        width: 40px; height: 40px; font-size: 14px;
        border-radius: 8px;
    }
    .nav-bell {
        width: 40px; height: 40px; border-radius: 8px;
    }

    /* Avatar btn — circle, no border/bg ever (clean look on touch) */
    .nav-user-wrap { display: block !important; }
    .nav-user-btn {
        display: flex !important;
        width: 40px; height: 40px;
        padding: 2px; border-radius: 50%;
        background: none !important;
        border: none !important;
        align-items: center; justify-content: center;
        margin-left: 1px;
    }
    .nav-user-btn:hover,
    .nav-user-btn:focus,
    .nav-user-btn:active {
        background: var(--color-soft) !important;
        border: none !important;
        outline: none !important;
    }
    .nav-user-btn .nav-user-name,
    .nav-user-btn > i.fa-chevron-down { display: none !important; }
    .nav-user-avatar {
        width: 30px; height: 30px;
        border-radius: 50%;
        border: 1px solid var(--color-line);
    }

    /* Dropdowns: full-bleed below navbar, slide-down */
    .noti-dd-panel {
        position: fixed !important; top: var(--nav-h) !important;
        right: 6px !important; left: 6px !important;
        width: auto !important; max-width: none !important;
        max-height: 75vh !important; overflow-y: auto !important;
        transform: none !important; border-radius: 12px !important;
    }
    /* Mobile: CHỈ mở/đóng bằng class .active (JS toggle) — bỏ :hover vì touch
       bị "sticky hover" → bấm lần 2 panel không ẩn */
    .noti-dd-panel.active {
        opacity: 1 !important; visibility: visible !important;
    }
    .nav-user-dd {
        position: fixed !important; top: calc(var(--nav-h) + 6px) !important;
        right: 8px !important; left: auto !important;
        width: 240px !important; max-width: calc(100vw - 16px);
        transform: none !important;
        border-radius: 12px !important;
    }
    .nav-user-wrap.active .nav-user-dd {
        opacity: 1 !important; visibility: visible !important;
    }
}
@media (max-width: 380px) {
    /* Màn rất nhỏ — logo cực gọn */
    #nav-logo-img { height: 28px !important; max-width: 105px !important; }
    .nav-actions { gap: 0 !important; padding-right: 0 !important; }
    .nav-search-mobile, .nav-bell, .nav-user-btn { width: 36px !important; height: 36px !important; }
    .nav-hamburger { width: 36px !important; height: 36px !important; }
}
@media (max-width: 400px) {
    .nav-inner { padding: 0 12px; }
}
/* Logged-in mobile → dùng sidebar drawer, ẩn nav-mobile-panel cũ */
@media (max-width: 1023px) {
    body.has-sidebar .nav-mobile-panel { display: none !important; }
}

/* ═══════════════════════════════════════════════════════════════
   GLOBAL SEARCH — refined Linear/Raycast style
═══════════════════════════════════════════════════════════════ */

/* Trigger pill (desktop) — slim, low-key */
.nav-search-wrap { flex: 1; max-width: 420px; margin: 0 20px; min-width: 0; }

/* Guest layout swap: menu sau logo (chiếm giữa), search dồn về bên cạnh login */
@media (min-width: 992px) {
    .nav-inner[data-guest="1"] .nav-links     { order: 2; flex: 1; }
    .nav-inner[data-guest="1"] .nav-search-wrap {
        order: 3;
        /* `flex: 0 0 auto` + width cứng 280px làm thanh nav tràn ~55px ở 1280px:
           logo 160 + search 280 + menu 495 + hành động 324 + padding 56 = 1315 > 1224,
           nút CTA "Bắt đầu miễn phí" bị đẩy ra ngoài mép, mất chữ. Cho ô tìm kiếm co
           lại (nó có min-width:0) — thu hẹp ô tìm kiếm nhẹ hơn nhiều so với cụt nút CTA. */
        flex: 0 1 280px;
        max-width: 280px;
        margin: 0 12px 0 0;
    }
    .nav-inner[data-guest="1"] .nav-actions   { order: 4; }
}
.nav-search-trigger {
    display: flex; align-items: center; gap: 9px;
    width: 100%; height: 34px;
    padding: 0 8px 0 12px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    color: var(--color-muted);
    font-size: 13px; font-family: var(--font-sans); font-weight: var(--fw-medium);
    cursor: pointer; transition: border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
    text-align: left;
}
.nav-search-trigger:hover {
    background: var(--color-surface);
    border-color: var(--color-line);
}
.nav-search-trigger > i { color: var(--color-muted); font-size: 12px; flex-shrink: 0; }
.nav-search-placeholder {
    flex: 1; min-width: 0;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.nav-search-kbd {
    display: inline-flex; gap: 1px; flex-shrink: 0;
}
.nav-search-kbd kbd {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: 18px; height: 18px; padding: 0 4px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-family: var(--font-mono); font-size: 10px; font-weight: var(--fw-bold);
    color: var(--color-muted);
}

/* Mobile search icon */
.nav-search-mobile {
    display: none;
    width: 40px; height: 40px; border-radius: var(--radius-md);
    background: none; border: none; cursor: pointer;
    align-items: center; justify-content: center;
    color: var(--color-text); font-size: 16px;
    transition: background var(--dur-fast) var(--ease);
}
.nav-search-mobile:hover { background: var(--color-soft); }
@media (max-width: 991px) {
    .nav-search-wrap { display: none; }
    /* Ẩn nút tìm kiếm trên mobile theo yêu cầu (vẫn còn ⌘K trên desktop) */
    .nav-search-mobile { display: none !important; }
}

/* ── Modal ────────────────────────────────────────────────────── */
.gs-overlay {
    position: fixed; inset: 0;
    background: color-mix(in srgb, var(--color-ink) 38%, transparent);
    backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
    z-index: 9998;
    opacity: 0; visibility: hidden;
    transition: opacity .15s var(--ease), visibility .15s;
    display: flex; align-items: flex-start; justify-content: center;
    padding: 80px 16px 16px;
}
.gs-overlay.open { opacity: 1; visibility: visible; }
@media (max-width: 640px) {
    .gs-overlay { padding: 0; align-items: stretch; }
}
.gs-modal {
    width: 100%; max-width: 600px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: 0 20px 50px -10px color-mix(in srgb, var(--color-ink) 28%, transparent),
                0 0 0 1px color-mix(in srgb, var(--color-ink) 5%, transparent);
    overflow: hidden;
    transform: translateY(-6px) scale(.985);
    transition: transform .18s var(--ease);
    max-height: calc(100vh - 96px);
    display: flex; flex-direction: column;
}
.gs-overlay.open .gs-modal { transform: translateY(0) scale(1); }
@media (max-width: 640px) {
    .gs-modal { max-width: 100%; max-height: 100vh; border-radius: 0; border: 0; }
}

/* ── Input row — prominent, breathable ───────────────────────── */
.gs-input-row {
    display: flex; align-items: center; gap: 10px;
    padding: 0 14px;
    height: 54px;
    border-bottom: 1px solid var(--color-line);
    flex-shrink: 0;
}
.gs-input-icon { color: var(--color-muted); font-size: 15px; flex-shrink: 0; }
.gs-input {
    flex: 1; min-width: 0; height: 100%;
    background: none; border: none; outline: none;
    font-size: 15px; font-family: var(--font-sans); font-weight: var(--fw-medium);
    color: var(--color-ink); letter-spacing: -.005em;
}
.gs-input::placeholder { color: var(--color-muted); font-weight: var(--fw-regular); }
.gs-close {
    width: 26px; height: 26px; border-radius: 6px;
    background: none; border: none; cursor: pointer;
    color: var(--color-muted); flex-shrink: 0;
    display: flex; align-items: center; justify-content: center;
    font-size: 11px;
    transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.gs-close:hover { background: var(--color-soft); color: var(--color-text); }

/* ── Filter tabs — text-only, underline active ───────────────── */
.gs-filters-wrap {
    position: relative; border-bottom: 1px solid var(--color-line); flex-shrink: 0;
}
.gs-filters-wrap::after {
    content: ''; position: absolute; right: 0; top: 0; bottom: 1px; width: 32px;
    pointer-events: none;
    background: linear-gradient(to right, transparent, var(--color-surface));
    opacity: 0; transition: opacity .15s var(--ease);
}
.gs-filters-wrap.has-overflow::after { opacity: 1; }
.gs-filters {
    display: flex; gap: 2px; padding: 4px 10px 0;
    overflow-x: auto; scrollbar-width: none; flex-shrink: 0;
    -webkit-overflow-scrolling: touch;
}
.gs-filters::-webkit-scrollbar { display: none; }
.gs-chip {
    position: relative;
    padding: 8px 10px;
    background: none; color: var(--color-muted);
    font-size: 12.5px; font-weight: var(--fw-semibold);
    border: none; cursor: pointer; white-space: nowrap;
    transition: color var(--dur-fast) var(--ease);
}
.gs-chip:hover { color: var(--color-text); }
.gs-chip.active { color: var(--color-primary); }
.gs-chip.active::after {
    content: ''; position: absolute;
    left: 8px; right: 8px; bottom: -1px; height: 2px;
    background: var(--color-primary); border-radius: 2px 2px 0 0;
}
.gs-chip i { display: none; }

/* ── Body / results ───────────────────────────────────────────── */
.gs-body {
    flex: 1; min-height: 0; overflow-y: auto;
    padding: 4px 0;
    min-height: 200px;
}
.gs-body::-webkit-scrollbar { width: 6px; }
.gs-body::-webkit-scrollbar-track { background: transparent; }
.gs-body::-webkit-scrollbar-thumb { background: var(--color-line); border-radius: 3px; }

/* ── Empty state — minimal hint + quick browse ───────────────── */
.gs-empty { padding: 14px 0 0; color: var(--color-muted); }
.gs-empty-icon { display: none; }
.gs-empty-title { display: none; }
.gs-empty-hint {
    font-size: 12.5px; line-height: 1.5; color: var(--color-muted);
    padding: 0 14px 14px;
}
.gs-empty-hint strong { color: var(--color-text); font-weight: var(--fw-semibold); }

/* Quick browse — 4 colored category cards */
.gs-quick-head {
    padding: 12px 14px 6px;
    font-size: 10.5px; font-weight: var(--fw-bold);
    text-transform: uppercase; letter-spacing: .08em;
    color: var(--color-muted);
}
.gs-quick {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px; padding: 0 14px 12px;
}
.gs-quick-card {
    display: flex; flex-direction: column;
    align-items: center; justify-content: center; gap: 7px;
    padding: 14px 6px; border-radius: 10px;
    background: var(--color-soft);
    color: var(--color-text);
    font-size: 11.5px; font-weight: var(--fw-semibold);
    text-decoration: none; text-align: center;
    border: 1px solid transparent;
    transition: transform var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.gs-quick-card:hover { transform: translateY(-1px); border-color: var(--color-border); }
.gs-quick-card i {
    font-size: 18px;
    width: 36px; height: 36px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 10px;
}
.gs-q-vocab i     { background: color-mix(in srgb, var(--color-primary)   14%, transparent); color: var(--color-primary); }
.gs-q-shadow i    { background: color-mix(in srgb, var(--color-accent)    14%, transparent); color: var(--color-accent); }
.gs-q-ielts i     { background: color-mix(in srgb, var(--color-secondary) 14%, transparent); color: var(--color-secondary); }
.gs-q-community i { background: color-mix(in srgb, var(--color-warning)   14%, transparent); color: var(--color-warning); }
.gs-q-vocab:hover     { background: color-mix(in srgb, var(--color-primary)   6%, var(--color-soft)); }
.gs-q-shadow:hover    { background: color-mix(in srgb, var(--color-accent)    6%, var(--color-soft)); }
.gs-q-ielts:hover     { background: color-mix(in srgb, var(--color-secondary) 6%, var(--color-soft)); }
.gs-q-community:hover { background: color-mix(in srgb, var(--color-warning)   6%, var(--color-soft)); }
@media (max-width: 380px) {
    .gs-quick-card { font-size: 10.5px; padding: 12px 4px; gap: 6px; }
    .gs-quick-card i { font-size: 16px; width: 32px; height: 32px; }
}

.gs-shortcuts {
    display: flex; gap: 12px; flex-wrap: wrap;
    font-size: 11px; color: var(--color-muted);
    padding: 8px 4px 0; border-top: 1px solid var(--color-line);
}
.gs-shortcuts span { display: inline-flex; align-items: center; gap: 4px; }
.gs-shortcuts kbd {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: 16px; height: 16px; padding: 0 4px;
    background: var(--color-soft); border: 1px solid var(--color-border);
    border-radius: 3px; font-family: var(--font-mono);
    font-size: 9.5px; font-weight: var(--fw-bold); color: var(--color-text);
}

/* ── Recent searches ─────────────────────────────────────────── */
.gs-recent-head {
    display: flex; align-items: center; justify-content: space-between;
    padding: 14px 14px 4px;
    font-size: 10.5px; font-weight: var(--fw-bold);
    text-transform: uppercase; letter-spacing: .08em;
    color: var(--color-muted);
}
.gs-recent-clear {
    background: none; border: none; color: var(--color-muted);
    font-size: 11px; font-weight: var(--fw-semibold); cursor: pointer;
    padding: 2px 6px; border-radius: 4px;
}
.gs-recent-clear:hover { background: var(--color-soft); color: var(--color-text); }
.gs-recent-item {
    display: flex; align-items: center; gap: 10px;
    padding: 7px 14px; cursor: pointer;
    color: var(--color-text); font-size: 13px;
    transition: background var(--dur-fast) var(--ease);
}
.gs-recent-item:hover, .gs-recent-item.active { background: var(--color-soft); }
.gs-recent-item i { color: var(--color-muted); font-size: 10px; }
.gs-recent-item .gs-recent-remove {
    margin-left: auto; opacity: 0;
    width: 22px; height: 22px; border-radius: 5px; border: none;
    background: none; color: var(--color-muted);
    cursor: pointer; font-size: 10px;
}
.gs-recent-item:hover .gs-recent-remove { opacity: 1; }
.gs-recent-item .gs-recent-remove:hover { background: var(--color-bg); color: var(--color-text); }

/* ── Group head & items ──────────────────────────────────────── */
.gs-group-head {
    padding: 14px 14px 4px;
    font-size: 10.5px; font-weight: var(--fw-bold);
    text-transform: uppercase; letter-spacing: .08em;
    color: var(--color-muted);
    display: flex; align-items: center; gap: 6px;
}
.gs-group-head i { font-size: 10px; color: var(--color-muted); }
.gs-item {
    display: flex; align-items: center; gap: 11px;
    padding: 7px 14px; cursor: pointer;
    text-decoration: none; color: var(--color-ink);
    transition: background var(--dur-fast) var(--ease);
}
.gs-item:hover, .gs-item.active { background: var(--color-soft); }
.gs-thumb {
    width: 32px; height: 32px; border-radius: 7px;
    background: var(--color-soft);
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0; overflow: hidden;
    color: var(--color-primary); font-size: 13px;
}
.gs-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.gs-thumb.user-thumb { border-radius: 50%; }
.gs-thumb.video-thumb { width: 48px; height: 28px; border-radius: 5px; }
.gs-meta { flex: 1; min-width: 0; }
.gs-title {
    font-size: 13.5px; font-weight: var(--fw-semibold); color: var(--color-ink);
    line-height: 1.3; margin-bottom: 1px;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
    letter-spacing: -.005em;
}
.gs-title mark {
    background: none; color: var(--color-primary);
    padding: 0; border-radius: 0;
    font-weight: var(--fw-extrabold);
}
.gs-sub {
    font-size: 11.5px; font-weight: var(--fw-regular); color: var(--color-muted);
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.gs-pid {
    flex-shrink: 0; font-family: var(--font-mono);
    font-size: 10px; font-weight: var(--fw-bold);
    color: var(--color-muted); background: var(--color-soft);
    padding: 2px 6px; border-radius: 4px;
    letter-spacing: .04em;
}
.gs-item:hover .gs-pid, .gs-item.active .gs-pid { color: var(--color-primary); background: var(--color-primary-soft); }
.gs-arrow {
    flex-shrink: 0; opacity: 0; color: var(--color-muted); font-size: 10px;
    transition: opacity var(--dur-fast) var(--ease);
}
.gs-item:hover .gs-arrow, .gs-item.active .gs-arrow { opacity: 1; }

/* ── Loading / no-result ─────────────────────────────────────── */
.gs-loading { padding: 36px 14px; text-align: center; color: var(--color-muted); font-size: 12.5px; }
.gs-spinner {
    width: 22px; height: 22px; margin: 0 auto 10px;
    border: 2px solid var(--color-line);
    border-top-color: var(--color-primary);
    border-radius: 50%; animation: gsspin .7s linear infinite;
}
@keyframes gsspin { to { transform: rotate(360deg); } }

.gs-noresult { padding: 36px 14px; text-align: center; }
.gs-noresult-icon { display: none; }
.gs-noresult-text { font-size: 13.5px; color: var(--color-text); margin-bottom: 4px; font-weight: var(--fw-semibold); }
.gs-noresult-sub  { font-size: 12px; color: var(--color-muted); }

/* ── Footer — slim ───────────────────────────────────────────── */
.gs-footer {
    display: flex; align-items: center; justify-content: space-between;
    padding: 8px 14px; border-top: 1px solid var(--color-line);
    background: var(--color-bg); flex-shrink: 0;
}
.gs-footer-link {
    display: inline-flex; align-items: center; gap: 5px;
    color: var(--color-muted); text-decoration: none;
    font-size: 11.5px; font-weight: var(--fw-semibold);
    transition: color var(--dur-fast) var(--ease);
}
.gs-footer-link:hover { color: var(--color-primary); }
.gs-footer-link i { font-size: 10px; }
.gs-footer-hint { font-size: 11px; color: var(--color-muted); display: flex; gap: 12px; align-items: center; }
.gs-footer-hint span { display: inline-flex; align-items: center; gap: 4px; }
.gs-footer-hint kbd {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: 16px; height: 16px; padding: 0 4px;
    background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: 3px; font-family: var(--font-mono);
    font-size: 9.5px; font-weight: var(--fw-bold); color: var(--color-muted);
}
@media (max-width: 640px) {
    .gs-footer-hint { display: none; }

    /* Tighter, touch-friendly mobile modal */
    .gs-input-row { height: 56px; padding: 0 12px; gap: 8px; }
    .gs-input { font-size: 16px; /* iOS no-zoom-on-focus */ }
    .gs-input-icon { font-size: 16px; }
    .gs-close { width: 36px; height: 36px; font-size: 13px; }

    /* Filter chips — slightly tighter so more fit */
    .gs-filters { padding: 4px 8px 0; }
    .gs-chip { padding: 9px 10px; font-size: 13px; }
    .gs-chip.active::after { left: 10px; right: 10px; }

    /* Group/item — touch-friendly */
    .gs-item { padding: 9px 12px; gap: 12px; }
    .gs-thumb { width: 36px; height: 36px; }
    .gs-thumb.video-thumb { width: 54px; height: 32px; }
    .gs-title { font-size: 14px; }
    .gs-sub { font-size: 12px; }

    /* Quick browse — fits 4 columns even on small screen */
    .gs-quick-head { padding: 10px 12px 6px; }
    .gs-quick { padding: 0 12px 12px; gap: 6px; }

    /* Recent — touch padding */
    .gs-recent-head { padding: 12px 12px 4px; }
    .gs-recent-item { padding: 10px 12px; font-size: 14px; }
    .gs-recent-item .gs-recent-remove { opacity: 1; }

    /* Footer */
    .gs-footer { padding: 10px 12px; }
    .gs-footer-link { font-size: 12.5px; }
}

/* ── Switcher ngôn ngữ (i18n public) ── */
.nav-lang-form { display: flex; align-items: center; }
.nav-lang-form button {
    display: flex; align-items: center; gap: 5px;
    background: transparent; border: 1px solid var(--color-border); border-radius: var(--radius-md);
    color: var(--color-muted); font-size: 12px; font-weight: var(--fw-bold);
    padding: 6px 10px; cursor: pointer; font-family: inherit; letter-spacing: .03em;
    transition: all var(--dur-fast, .15s) var(--ease, ease);
}
.nav-lang-form button:hover { color: var(--color-primary); border-color: var(--color-primary); background: var(--color-primary-soft); }
.nav-dd-lang { display: flex; align-items: center; justify-content: space-between; padding: 8px 14px; }
.nav-dd-lang__label { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--color-text); }
.nav-dd-lang__opts { display: flex; gap: 4px; }
.nav-dd-lang__opt {
    border: 1px solid var(--color-border); background: transparent; border-radius: var(--radius-sm);
    color: var(--color-muted); font-size: 11.5px; font-weight: var(--fw-bold);
    padding: 4px 9px; cursor: pointer; font-family: inherit;
}
.nav-dd-lang__opt.is-on { background: var(--color-primary); border-color: var(--color-primary); color: var(--color-on-dark); cursor: default; }
.nav-dd-lang__opt:not(.is-on):hover { color: var(--color-primary); border-color: var(--color-primary); }
.mob-lang-row { padding: 12px 0 4px; }
.mob-lang-row .nav-lang-form button { width: 100%; justify-content: center; padding: 10px; font-size: 13px; }
@media (max-width: 767px) { .nav-actions .nav-lang-form { display: none; } }

/* ── Khối 2: nút Cộng đồng / Xếp hạng / Góp ý… (chỉ có ý nghĩa khi đăng nhập, để chung cho gọn) ── */
    .nav-community-btn,
    .nav-leaderboard-btn,
    .nav-feedback-btn,
    .nav-ext-btn,
    .nav-shop-btn,
    .nav-dict-btn {
        display: inline-flex; align-items: center; gap: 7px;
        padding: 0 14px; height: 38px;
        border-radius: 10px;
        font-weight: var(--fw-bold); font-size: 13.5px;
        text-decoration: none; white-space: nowrap;
        transition: all var(--dur-fast) var(--ease);
        margin-right: 10px; flex-shrink: 0;
    }
    .nav-community-btn {
        background: var(--color-accent-soft);
        color: var(--color-accent);
        border: 1px solid color-mix(in srgb, var(--color-accent) 18%, transparent);
    }
    .nav-community-btn:hover {
        background: var(--color-accent);
        color: var(--color-on-dark);
        transform: translateY(-1px);
        box-shadow: 0 4px 12px -2px color-mix(in srgb, var(--color-accent) 35%, transparent);
    }
    .nav-community-btn.is-active { background: var(--color-accent); color: var(--color-on-dark); }
    .nav-leaderboard-btn {
        background: var(--color-warning-soft);
        color: var(--color-warning);
        border: 1px solid color-mix(in srgb, var(--color-warning) 18%, transparent);
    }
    .nav-leaderboard-btn:hover {
        background: var(--color-warning);
        color: var(--color-on-dark);
        transform: translateY(-1px);
        box-shadow: 0 4px 12px -2px color-mix(in srgb, var(--color-warning) 35%, transparent);
    }
    .nav-leaderboard-btn.is-active { background: var(--color-warning); color: var(--color-on-dark); }
    .nav-dict-btn {
        background: var(--color-primary-soft);
        color: var(--color-primary);
        border: 1px solid color-mix(in srgb, var(--color-primary) 18%, transparent);
    }
    .nav-dict-btn:hover {
        background: var(--color-primary);
        color: var(--color-on-dark);
        transform: translateY(-1px);
        box-shadow: 0 4px 12px -2px color-mix(in srgb, var(--color-primary) 35%, transparent);
    }
    .nav-dict-btn.is-active { background: var(--color-primary); color: var(--color-on-dark); }
    .nav-feedback-btn {
        background: var(--color-secondary-soft);
        color: var(--color-secondary);
        border: 1px solid color-mix(in srgb, var(--color-secondary) 18%, transparent);
    }
    .nav-feedback-btn:hover {
        background: var(--color-secondary);
        color: var(--color-on-dark);
        transform: translateY(-1px);
        box-shadow: 0 4px 12px -2px color-mix(in srgb, var(--color-secondary) 35%, transparent);
    }
    .nav-feedback-btn.is-active { background: var(--color-secondary); color: var(--color-on-dark); }
    .nav-ext-btn {
        background: var(--color-warning-soft);
        color: var(--color-warning);
        border: 1px solid color-mix(in srgb, var(--color-warning) 18%, transparent);
    }
    .nav-ext-btn:hover {
        background: var(--color-warning);
        color: var(--color-on-dark);
        transform: translateY(-1px);
        box-shadow: 0 4px 12px -2px color-mix(in srgb, var(--color-warning) 35%, transparent);
    }
    .nav-ext-btn.is-active { background: var(--color-warning); color: var(--color-on-dark); }
    .nav-shop-btn {
        background: var(--color-primary);
        color: var(--color-on-dark);
        border: 1px solid var(--color-primary);
    }
    .nav-shop-btn:hover {
        background: var(--color-primary-hover);
        color: var(--color-on-dark);
        transform: translateY(-1px);
        box-shadow: 0 4px 12px -2px color-mix(in srgb, var(--color-primary) 40%, transparent);
    }
    .nav-shop-btn.is-active { background: var(--color-primary-hover); color: var(--color-on-dark); }
    .nav-shop-btn i { font-size: 13px; }
    .nav-community-btn i,
    .nav-leaderboard-btn i,
    .nav-feedback-btn i,
    .nav-ext-btn i,
    .nav-dict-btn i { font-size: 13px; }

    /* ── "Công cụ" dropdown (gộp Từ điển + Tiện ích) ── */
    .nav-tools-dd { position: relative; display: inline-flex; margin-right: 10px; flex-shrink: 0; }
    .nav-tools-btn {
        display: inline-flex; align-items: center; gap: 7px;
        padding: 0 12px 0 14px; height: 38px; border-radius: 10px;
        font-family: inherit; font-weight: var(--fw-bold); font-size: 13.5px;
        cursor: pointer; white-space: nowrap;
        background: var(--color-primary-soft); color: var(--color-primary);
        border: 1px solid color-mix(in srgb, var(--color-primary) 18%, transparent);
        transition: all var(--dur-fast) var(--ease);
    }
    .nav-tools-btn i { font-size: 13px; }
    .nav-tools-btn__chev { font-size: 10px !important; opacity: .7; transition: transform var(--dur-fast) var(--ease); }
    .nav-tools-dd:hover .nav-tools-btn,
    .nav-tools-btn.is-active { background: var(--color-primary); color: var(--color-on-dark); }
    .nav-tools-dd:hover .nav-tools-btn__chev { transform: rotate(180deg); }
    /* cầu nối hover để panel không mất khi rê chuột xuống */
    .nav-tools-dd::after { content: ''; position: absolute; top: 100%; left: 0; right: 0; height: 8px; }
    .nav-tools-dd__panel {
        position: absolute; top: calc(100% + 8px); left: 0; z-index: 200;
        min-width: 236px; padding: 6px;
        background: var(--color-surface); border: 1px solid var(--color-border);
        border-radius: 12px; box-shadow: var(--shadow-lg);
        opacity: 0; visibility: hidden; transform: translateY(-6px);
        transition: opacity var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease), visibility var(--dur-fast);
    }
    .nav-tools-dd:hover .nav-tools-dd__panel,
    .nav-tools-dd:focus-within .nav-tools-dd__panel { opacity: 1; visibility: visible; transform: translateY(0); }
    .nav-tools-dd__item { display: flex; align-items: center; gap: 11px; padding: 9px 11px; border-radius: 9px; text-decoration: none; }
    .nav-tools-dd__item i { font-size: 15px; width: 20px; text-align: center; color: var(--color-primary); }
    .nav-tools-dd__item:hover,
    .nav-tools-dd__item.is-active { background: var(--color-primary-soft); }
    .nav-tools-dd__t { font-size: 13.5px; font-weight: var(--fw-bold); color: var(--color-ink); line-height: 1.2; }
    .nav-tools-dd__d { font-size: 11.5px; color: var(--color-muted); margin-top: 1px; }

    /* ── "Hỗ trợ" dropdown (gộp Góp ý + Liên hệ) — tông secondary (xanh lá) ── */
    .nav-support-dd { position: relative; display: inline-flex; margin-right: 10px; flex-shrink: 0; }
    .nav-support-btn {
        display: inline-flex; align-items: center; gap: 7px;
        padding: 0 12px 0 14px; height: 38px; border-radius: 10px;
        font-family: inherit; font-weight: var(--fw-bold); font-size: 13.5px;
        cursor: pointer; white-space: nowrap;
        background: var(--color-secondary-soft); color: var(--color-secondary);
        border: 1px solid color-mix(in srgb, var(--color-secondary) 18%, transparent);
        transition: all var(--dur-fast) var(--ease);
    }
    .nav-support-btn i { font-size: 13px; }
    .nav-support-btn__chev { font-size: 10px !important; opacity: .7; transition: transform var(--dur-fast) var(--ease); }
    .nav-support-dd:hover .nav-support-btn,
    .nav-support-btn.is-active { background: var(--color-secondary); color: var(--color-on-dark); }
    .nav-support-dd:hover .nav-support-btn__chev { transform: rotate(180deg); }
    .nav-support-dd::after { content: ''; position: absolute; top: 100%; left: 0; right: 0; height: 8px; }
    .nav-support-dd__panel {
        position: absolute; top: calc(100% + 8px); left: 0; z-index: 200;
        min-width: 224px; padding: 6px;
        background: var(--color-surface); border: 1px solid var(--color-border);
        border-radius: 12px; box-shadow: var(--shadow-lg);
        opacity: 0; visibility: hidden; transform: translateY(-6px);
        transition: opacity var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease), visibility var(--dur-fast);
    }
    .nav-support-dd:hover .nav-support-dd__panel,
    .nav-support-dd:focus-within .nav-support-dd__panel { opacity: 1; visibility: visible; transform: translateY(0); }
    .nav-support-dd__item { display: flex; align-items: center; gap: 11px; padding: 9px 11px; border-radius: 9px; text-decoration: none; }
    .nav-support-dd__item i { font-size: 15px; width: 20px; text-align: center; color: var(--color-secondary); }
    .nav-support-dd__item:hover,
    .nav-support-dd__item.is-active { background: var(--color-secondary-soft); }
    .nav-support-dd__t { font-size: 13.5px; font-weight: var(--fw-bold); color: var(--color-ink); line-height: 1.2; }
    .nav-support-dd__d { font-size: 11.5px; color: var(--color-muted); margin-top: 1px; }

    @media (max-width: 1023px) {
        .nav-community-btn,
        .nav-leaderboard-btn,
        .nav-feedback-btn,
        .nav-ext-btn,
        .nav-shop-btn,
        .nav-tools-dd,
        .nav-support-dd,
        .nav-dict-btn { display: none; }
    }