@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap');

:root {
    --bg-deep: #0a0e1a;
    --bg-mid: #121829;
    --accent-cyan: #00d4ff;
    --accent-violet: #8b5cf6;
    --accent-pink: #ec4899;
    --accent-emerald: #10b981;
    --glass-bg: rgba(255, 255, 255, 0.06);
    --glass-border: rgba(255, 255, 255, 0.12);
    --glass-highlight: rgba(255, 255, 255, 0.18);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --shadow-glow: 0 0 40px rgba(0, 212, 255, 0.15);
    --shadow-card: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 10px;
    --perspective: 1200px;
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body.app-3d {
    margin: 0;
    min-height: 100vh;
    font-family: 'Outfit', system-ui, sans-serif;
    background: var(--bg-deep);
    color: var(--text-primary);
    overflow-x: hidden;
    line-height: 1.6;
}

/* ── Animated 3D background ── */
.scene-bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    overflow: hidden;
    pointer-events: none;
}

.scene-bg__gradient {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 20% 10%, rgba(139, 92, 246, 0.25) 0%, transparent 50%),
        radial-gradient(ellipse 60% 50% at 80% 80%, rgba(0, 212, 255, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse 50% 40% at 50% 50%, rgba(236, 72, 153, 0.08) 0%, transparent 60%),
        linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-mid) 50%, #0d1220 100%);
}

.scene-bg__grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    transform: perspective(500px) rotateX(60deg) scale(2);
    transform-origin: center top;
    opacity: 0.4;
    animation: grid-drift 20s linear infinite;
}

@keyframes grid-drift {
    0% { background-position: 0 0; }
    100% { background-position: 0 60px; }
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.5;
    animation: orb-float 8s ease-in-out infinite;
}

.orb--1 { width: 320px; height: 320px; background: var(--accent-violet); top: -80px; left: -80px; animation-delay: 0s; }
.orb--2 { width: 280px; height: 280px; background: var(--accent-cyan); bottom: 10%; right: -60px; animation-delay: -3s; }
.orb--3 { width: 200px; height: 200px; background: var(--accent-pink); top: 40%; left: 30%; animation-delay: -5s; opacity: 0.3; }

@keyframes orb-float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -20px) scale(1.05); }
    66% { transform: translate(-20px, 15px) scale(0.95); }
}

/* Floating 3D language badges */
.floating-langs {
    position: absolute;
    inset: 0;
    perspective: 800px;
}

.lang-badge {
    position: absolute;
    padding: 0.5rem 1rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    backdrop-filter: blur(12px);
    animation: badge-float 6s ease-in-out infinite;
    white-space: nowrap;
}

.lang-badge:nth-child(1) { top: 15%; left: 8%; animation-delay: 0s; }
.lang-badge:nth-child(2) { top: 25%; right: 12%; animation-delay: -1s; }
.lang-badge:nth-child(3) { bottom: 30%; left: 15%; animation-delay: -2s; }
.lang-badge:nth-child(4) { bottom: 20%; right: 8%; animation-delay: -3s; }
.lang-badge:nth-child(5) { top: 55%; left: 5%; animation-delay: -4s; }
.lang-badge:nth-child(6) { top: 70%; right: 20%; animation-delay: -2.5s; }

@keyframes badge-float {
    0%, 100% { transform: translateY(0) rotateY(0deg); }
    50% { transform: translateY(-12px) rotateY(8deg); }
}

/* ── Layout shell ── */
.page-wrap {
    position: relative;
    z-index: 1;
    min-height: 100vh;
}

.container-3d {
    width: min(1200px, 94vw);
    margin: 0 auto;
    padding: 0 1rem;
}

/* ── Glass card with 3D tilt ── */
.card-3d {
    position: relative;
    transform-style: preserve-3d;
    transition: transform var(--transition), box-shadow var(--transition);
    will-change: transform;
}

.card-3d__inner {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transform: translateZ(0);
}

.card-3d__inner::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(135deg, var(--glass-highlight), transparent 40%, transparent 60%, rgba(0,212,255,0.2));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.card-3d__shine {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255,255,255,0.08) 0%, transparent 50%);
    pointer-events: none;
    border-radius: inherit;
    opacity: 0;
    transition: opacity 0.3s;
}

.card-3d:hover .card-3d__shine { opacity: 1; }

/* ── Nav ── */
.nav-3d__brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.15rem;
}

.nav-3d__logo {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-violet));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
    transform: rotateY(-5deg);
}

/* ── Buttons ── */
.btn-3d {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.85rem 1.75rem;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
    position: relative;
    overflow: hidden;
}

.btn-3d--primary {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-violet));
    color: #fff;
    box-shadow: 0 4px 24px rgba(0, 212, 255, 0.35);
}

.btn-3d--primary:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 32px rgba(0, 212, 255, 0.45);
}

.btn-3d--ghost {
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-3d--ghost:hover {
    background: var(--glass-highlight);
    transform: translateY(-1px);
}

.btn-3d--sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-3d:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* ── Hero (index) ── */
.hero {
    padding: 3rem 0 4rem;
    text-align: center;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--accent-cyan);
    margin-bottom: 1.5rem;
    animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.2); }
    50% { box-shadow: 0 0 20px 4px rgba(0, 212, 255, 0.15); }
}

.hero__title {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.15;
    margin: 0 0 1rem;
    background: linear-gradient(135deg, #fff 0%, var(--accent-cyan) 50%, var(--accent-violet) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto 2rem;
    font-weight: 400;
}

.hero__cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

/* 3D Globe visual */
.hero__visual {
    perspective: 600px;
    margin: 2rem auto 3rem;
    max-width: 280px;
}

.globe-3d {
    width: 200px;
    height: 200px;
    margin: 0 auto;
    position: relative;
    transform-style: preserve-3d;
    animation: globe-spin 20s linear infinite;
}

.globe-3d__sphere {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background:
        radial-gradient(circle at 30% 30%, rgba(255,255,255,0.3), transparent 50%),
        linear-gradient(135deg, rgba(0,212,255,0.4), rgba(139,92,246,0.5));
    border: 2px solid rgba(255,255,255,0.2);
    box-shadow:
        inset -20px -20px 40px rgba(0,0,0,0.3),
        0 0 60px rgba(0, 212, 255, 0.3);
}

.globe-3d__ring {
    position: absolute;
    inset: -20px;
    border: 2px solid rgba(0, 212, 255, 0.3);
    border-radius: 50%;
    transform: rotateX(75deg);
    animation: ring-spin 8s linear infinite reverse;
}

@keyframes globe-spin {
    0% { transform: rotateY(0deg) rotateX(10deg); }
    100% { transform: rotateY(360deg) rotateX(10deg); }
}

@keyframes ring-spin {
    0% { transform: rotateX(75deg) rotateZ(0deg); }
    100% { transform: rotateX(75deg) rotateZ(360deg); }
}

/* Stats row */
.stats-row {
    margin: 2rem 0;
}

.stat-card {
    text-align: center;
}

.stat-card__value {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-violet));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-card__label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 0.25rem;
}

/* Feature grid */
.section {
    padding: 3rem 0;
}

.section__title {
    font-size: 1.75rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
}

.section__desc {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

.feature-card {
    transform-style: preserve-3d;
}

.feature-card__icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    margin-bottom: 1rem;
    transform: translateZ(20px);
}

.feature-card__icon--cyan { background: rgba(0, 212, 255, 0.15); color: var(--accent-cyan); }
.feature-card__icon--violet { background: rgba(139, 92, 246, 0.15); color: var(--accent-violet); }
.feature-card__icon--pink { background: rgba(236, 72, 153, 0.15); color: var(--accent-pink); }
.feature-card__icon--emerald { background: rgba(16, 185, 129, 0.15); color: var(--accent-emerald); }

.feature-card__title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.feature-card__text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.55;
}

/* How it works steps */
.steps-3d {
    counter-reset: step;
}

.step-card {
    transform-style: preserve-3d;
}

.step-card .card-3d__inner {
    position: relative;
    counter-increment: step;
}

.step-card .card-3d__inner::before {
    content: counter(step);
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-violet));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    z-index: 2;
}

.step-card__title {
    font-weight: 600;
    margin-bottom: 0.5rem;
    padding-right: 2.5rem;
}

.step-card__text {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Language grid */
.lang-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    justify-content: center;
}

.lang-chip {
    padding: 0.45rem 1rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: all 0.25s;
    cursor: default;
}

.lang-chip:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 212, 255, 0.2);
}

/* Info callout */
.info-callout {
    padding: 1.5rem 2rem;
    margin: 2rem 0;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.info-callout__icon {
    font-size: 1.5rem;
    color: var(--accent-cyan);
    flex-shrink: 0;
}

.info-callout__text {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.info-callout__text strong {
    color: var(--text-primary);
}

/* Footer */
.footer-3d {
    padding: 2rem 0 3rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--glass-border);
    margin-top: 2rem;
}

/* ── Learn page layout ── */
.learn-layout {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 1.5rem;
    padding: 1.5rem 0 3rem;
    align-items: start;
}

@media (max-width: 900px) {
    .learn-layout {
        grid-template-columns: 1fr;
    }
}

.sidebar-panel {
    position: sticky;
    top: 1rem;
}

.sidebar-panel .card-3d__inner {
    padding: 1.5rem;
}

.sidebar-panel__section {
    margin-bottom: 1.5rem;
}

.sidebar-panel__section:last-child {
    margin-bottom: 0;
}

.sidebar-panel__heading {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sidebar-panel__heading i {
    color: var(--accent-cyan);
}

.live-stat {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--glass-border);
    font-size: 0.9rem;
}

.live-stat:last-child { border-bottom: none; }

.live-stat__label { color: var(--text-secondary); }
.live-stat__value { font-weight: 600; color: var(--accent-cyan); }

.tip-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.tip-list li {
    padding: 0.5rem 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    gap: 0.5rem;
    align-items: flex-start;
}

.tip-list li::before {
    content: '→';
    color: var(--accent-violet);
    font-weight: 700;
}

.main-panel .card-3d__inner {
    padding: 1.75rem;
}

.panel-header {
    margin-bottom: 1.5rem;
}

.panel-header__title {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.35rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.panel-header__title i {
    color: var(--accent-cyan);
}

.panel-header__sub {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin: 0;
}

/* Form controls (learn page) */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-group label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.form-group input,
.form-group select {
    padding: 0.7rem 1rem;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.15);
}

.form-group select option {
    background: var(--bg-mid);
    color: var(--text-primary);
}

.form-row-toggle {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
    padding: 0.75rem 1rem;
    background: rgba(0, 0, 0, 0.15);
    border-radius: var(--radius-sm);
    border: 1px solid var(--glass-border);
}

.form-row-toggle input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent-cyan);
    cursor: pointer;
}

.form-row-toggle label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.form-row-toggle select {
    flex: 1;
    min-width: 140px;
    padding: 0.5rem 0.75rem;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
}

.form-row-toggle select:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* Chatbox 3D */
#chatbox {
    width: 100%;
    height: 380px;
    overflow-y: auto;
    padding: 1rem;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    scroll-behavior: smooth;
}

#chatbox::-webkit-scrollbar {
    width: 6px;
}

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

#chatbox::-webkit-scrollbar-thumb {
    background: var(--glass-border);
    border-radius: 3px;
}

.message {
    padding: 0.85rem 1rem;
    margin-bottom: 0.75rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    transition: transform 0.2s, border-color 0.2s;
    animation: msg-in 0.35s ease-out;
}

@keyframes msg-in {
    from { opacity: 0; transform: translateY(10px) translateZ(-10px); }
    to { opacity: 1; transform: translateY(0) translateZ(0); }
}

.message:hover {
    border-color: rgba(0, 212, 255, 0.25);
    transform: translateX(4px);
}

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

.translated {
    color: var(--accent-cyan);
    font-style: italic;
}

.additional-translated {
    color: var(--accent-violet);
    font-style: italic;
}

.timestamp {
    color: var(--text-muted);
    font-size: 0.75rem;
    margin-top: 0.25rem;
}

.speaker {
    cursor: pointer;
    font-size: 1rem;
    margin-left: 0.5rem;
    opacity: 0.7;
    transition: opacity 0.2s, transform 0.2s;
    display: inline-block;
}

.speaker:hover {
    opacity: 1;
    transform: scale(1.15);
}

.system-message {
    text-align: center;
    color: var(--text-muted);
    font-style: italic;
    padding: 1rem;
    background: rgba(0, 212, 255, 0.05);
    border: 1px dashed rgba(0, 212, 255, 0.2);
    border-radius: var(--radius-sm);
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
}

.error-text {
    color: #f87171;
}

.message-compose {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.message-compose input {
    flex: 1;
    padding: 0.85rem 1.15rem;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
}

.message-compose input:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.15);
}

.message-compose input::placeholder {
    color: var(--text-muted);
}

#audioOptions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem 1.5rem;
    margin-bottom: 1rem;
}

#audioOptions label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
}

#audioOptions input[type="checkbox"] {
    accent-color: var(--accent-cyan);
}

.learn-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--glass-border);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-secondary);
    border: 1px solid var(--glass-border);
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.875rem;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--text-primary);
}

.save-hint {
    color: var(--accent-emerald);
    font-size: 0.85rem;
    opacity: 0;
    transition: opacity 0.3s;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.save-hint.visible { opacity: 1; }

/* Scroll reveal */
.reveal {
    opacity: 0;
    transform: translateY(30px) rotateX(5deg);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0) rotateX(0);
}

/* ── Mobile Responsive Adjustments ── */
@media (max-width: 768px) {
    .floating-langs {
        display: none;
    }
    
    .hero {
        padding: 2rem 0 3rem;
    }
    
    .hero__cta {
        flex-direction: column;
        align-items: stretch;
    }
    
    .hero__cta .btn-3d {
        width: 100%;
    }
}

@media (max-width: 767.98px) {
    .navbar-collapse {
        background: rgba(18, 24, 41, 0.95);
        border: 1px solid var(--glass-border);
        border-radius: var(--radius-md);
        padding: 1.5rem;
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        margin-top: 0.75rem;
        box-shadow: var(--shadow-card);
    }
}

@media (max-width: 400px) {
    .nav-3d__brand {
        font-size: 1rem;
        gap: 0.5rem;
    }
    .nav-3d__logo {
        width: 36px;
        height: 36px;
        font-size: 1.1rem;
    }
    .btn-3d--sm {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }
}