:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #8b5cf6;
    --dark: #1e1b4b;
    --light: #f8fafc;
    --gray: #64748b;
    --success: #22c55e;
    --danger: #ef4444;
    --radius: 12px;
    --shadow: 0 4px 24px rgba(0,0,0,0.08);
}

* { box-sizing: border-box; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: #334155;
    background: #fff;
    line-height: 1.6;
}

/* Navigation */
.navbar-brand {
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--dark) !important;
}

.navbar-brand span {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-link.active {
    color: var(--primary) !important;
    font-weight: 600;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    border-radius: 8px;
    padding: 10px 24px;
    font-weight: 600;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary));
    transform: translateY(-1px);
}

.btn-outline-primary {
    border-color: var(--primary);
    color: var(--primary);
    border-radius: 8px;
}

/* Hero */
.hero {
    background: linear-gradient(135deg, #eef2ff 0%, #faf5ff 50%, #fff 100%);
    padding: 80px 0;
    min-height: 500px;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    color: var(--dark);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--gray);
    max-width: 500px;
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: 8px;
}

/* Product Cards */
.product-card {
    border: none;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.12);
}

.product-card img {
    height: 200px;
    object-fit: contain;
    background: #f8fafc;
    padding: 20px;
}

.product-card .price {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary);
}

/* Try-On Page */
body.tryon-page {
    overflow: hidden;
    background: #000;
}

/* Optical loader */
.optical-loader {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #1e1b4b 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s, visibility 0.5s;
}

.optical-loader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader-glasses {
    width: 100px;
    height: 50px;
    color: var(--primary);
    animation: loader-float 2s ease-in-out infinite;
}

.loader-glasses-svg {
    width: 100%;
    height: 100%;
}

@keyframes loader-float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-8px) rotate(-3deg); }
}

.loader-text {
    color: #fff;
    font-weight: 700;
    font-size: 1.2rem;
    margin: 20px 0 6px;
}

.loader-sub {
    color: #a5b4fc;
    font-size: 0.9rem;
    margin: 0 0 24px;
}

.loader-bar {
    width: 200px;
    height: 4px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 2px;
    overflow: hidden;
}

.loader-bar-fill {
    height: 100%;
    width: 40%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 2px;
    animation: loader-progress 1.5s ease-in-out infinite;
}

@keyframes loader-progress {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(350%); }
}

/* Desktop header with back nav */
.tryon-desktop-header {
    align-items: center;
    justify-content: space-between;
    padding: 12px 0 16px;
    flex-shrink: 0;
}

.tryon-back-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--dark);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    padding: 8px 16px;
    border-radius: 8px;
    background: #fff;
    box-shadow: var(--shadow);
    transition: background 0.2s;
}

.tryon-back-link:hover {
    background: #eef2ff;
    color: var(--primary);
}

.tryon-desktop-title {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--dark);
}

.tryon-mesh-toggle-desktop {
    width: auto !important;
    padding: 8px 16px !important;
    border-radius: 8px !important;
    font-size: 13px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.tryon-mesh-toggle-desktop i {
    font-size: 1rem;
}

body.tryon-page .tryon-main {
    padding: 0;
    margin: 0;
}

.tryon-page-wrap {
    height: 100dvh;
    display: flex;
    flex-direction: column;
    background: #000;
}

.tryon-app {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.tryon-container {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 20px;
    flex: 1;
    min-height: 0;
}

.tryon-viewport {
    position: relative;
    background: #000;
    border-radius: var(--radius);
    overflow: hidden;
    aspect-ratio: 4/3;
}

.tryon-viewport video,
.tryon-viewport canvas {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.tryon-viewport canvas {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
}

.tryon-viewport video {
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    pointer-events: none;
}

/* Mobile header */
.tryon-mobile-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: #fff;
    z-index: 20;
    flex-shrink: 0;
}

.tryon-back-btn {
    color: var(--dark);
    font-size: 1.4rem;
    text-decoration: none;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.2s;
}

.tryon-back-btn:active {
    background: #eef2ff;
}

.tryon-mobile-title {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--dark);
}

.tryon-mesh-toggle {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 50%;
    background: #eef2ff;
    color: var(--primary);
    font-size: 1.1rem;
    cursor: pointer;
}

.tryon-mesh-toggle.active {
    background: var(--primary);
    color: #fff;
}

/* Mode toggle - centered pill */
.mode-toggle {
    position: absolute;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    gap: 0;
    background: rgba(0, 0, 0, 0.45);
    border-radius: 24px;
    padding: 4px;
    backdrop-filter: blur(8px);
}

.mode-btn {
    padding: 8px 16px;
    border: none;
    border-radius: 20px;
    background: transparent;
    color: rgba(255, 255, 255, 0.85);
    font-size: 13px;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
    white-space: nowrap;
}

.mode-btn.active {
    background: var(--primary);
    color: #fff;
}

.mode-btn i {
    margin-right: 4px;
}

/* Flip camera button */
.btn-flip-camera {
    position: absolute;
    top: 16px;
    left: 12px;
    z-index: 11;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: none;
    background: rgba(0, 0, 0, 0.45);
    color: #fff;
    font-size: 1.2rem;
    cursor: pointer;
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, transform 0.2s;
}

.btn-flip-camera:active {
    background: var(--primary);
    transform: rotate(180deg);
}

/* Face status indicator */
.face-status {
    position: absolute;
    top: 60px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    background: rgba(0, 0, 0, 0.55);
    color: #fff;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    backdrop-filter: blur(4px);
    transition: opacity 0.3s;
}

.face-status.detected {
    background: rgba(34, 197, 94, 0.75);
}

.face-status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #fbbf24;
    animation: pulse-dot 1.2s infinite;
}

.face-status.detected .face-status-dot {
    background: #fff;
    animation: none;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

/* Mobile frame carousel */
.tryon-mobile-frames {
    position: absolute;
    bottom: 90px;
    left: 0;
    right: 0;
    z-index: 10;
    padding: 0 12px;
}

.frame-info-mobile {
    text-align: center;
    margin-bottom: 8px;
}

.frame-name-mobile {
    display: block;
    color: #fff;
    font-weight: 600;
    font-size: 14px;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.6);
}

.frame-price-mobile {
    color: rgba(255, 255, 255, 0.9);
    font-size: 13px;
    font-weight: 600;
}

.frame-carousel {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding: 8px 4px;
    scrollbar-width: none;
}

.frame-carousel::-webkit-scrollbar {
    display: none;
}

.frame-carousel-item {
    flex: 0 0 72px;
    scroll-snap-align: center;
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid transparent;
    border-radius: 12px;
    padding: 8px;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    backdrop-filter: blur(4px);
}

.frame-carousel-item.active {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.35);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.5);
}

.frame-carousel-item img {
    width: 100%;
    height: 36px;
    object-fit: contain;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.3));
}

/* Capture button */
.btn-capture {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 64px;
    height: 64px;
    border-radius: 50%;
    border: 4px solid #fff;
    background: var(--primary);
    color: #fff;
    font-size: 26px;
    cursor: pointer;
    z-index: 11;
    transition: transform 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.5);
}

.btn-capture:active {
    transform: translateX(-50%) scale(0.95);
}

/* Quick action buttons (mobile) */
.tryon-quick-actions {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.quick-action-btn {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: none;
    background: rgba(0, 0, 0, 0.45);
    color: #fff;
    font-size: 1.1rem;
    cursor: pointer;
    backdrop-filter: blur(4px);
}

.quick-action-btn:active {
    background: var(--primary);
}

/* Bottom nav */
.tryon-bottom-nav {
    display: flex;
    justify-content: space-around;
    align-items: center;
    background: #fff;
    border-top: 1px solid #e2e8f0;
    padding: 8px 0 calc(8px + env(safe-area-inset-bottom));
    flex-shrink: 0;
    z-index: 30;
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--gray);
    font-size: 10px;
    gap: 2px;
    padding: 4px 8px;
}

.bottom-nav-item i {
    font-size: 1.3rem;
}

.bottom-nav-item.active {
    color: var(--primary);
}

.bottom-nav-item.active i {
    background: var(--primary);
    color: #fff;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: -20px;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

/* Adjust bottom sheet */
.adjust-sheet {
    position: fixed;
    inset: 0;
    z-index: 100;
    pointer-events: none;
    visibility: hidden;
}

.adjust-sheet.open {
    pointer-events: auto;
    visibility: visible;
}

.adjust-sheet-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    transition: opacity 0.3s;
}

.adjust-sheet.open .adjust-sheet-backdrop {
    opacity: 1;
}

.adjust-sheet-panel {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: #fff;
    border-radius: 20px 20px 0 0;
    padding: 16px 20px calc(24px + env(safe-area-inset-bottom));
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.adjust-sheet.open .adjust-sheet-panel {
    transform: translateY(0);
}

.adjust-sheet-handle {
    width: 40px;
    height: 4px;
    background: #cbd5e1;
    border-radius: 2px;
    margin: 0 auto 16px;
}

.adjust-row {
    margin-bottom: 16px;
}

.adjust-row label {
    font-weight: 600;
    font-size: 14px;
    display: block;
    margin-bottom: 6px;
}

.adjust-value {
    font-size: 13px;
    color: var(--primary);
    font-weight: 600;
}

.position-pad {
    display: grid;
    grid-template-columns: repeat(3, 48px);
    grid-template-rows: repeat(3, 48px);
    gap: 4px;
    justify-content: center;
}

.pad-btn {
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    background: #f8fafc;
    font-size: 18px;
    cursor: pointer;
}

.pad-btn:active {
    background: var(--primary);
    color: #fff;
}

.pad-btn[data-dir="up"] { grid-column: 2; grid-row: 1; }
.pad-btn[data-dir="left"] { grid-column: 1; grid-row: 2; }
.pad-btn.pad-reset { grid-column: 2; grid-row: 2; }
.pad-btn[data-dir="right"] { grid-column: 3; grid-row: 2; }
.pad-btn[data-dir="down"] { grid-column: 2; grid-row: 3; }

.tryon-sidebar {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.sidebar-panel {
    background: #fff;
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
}

.sidebar-panel h5 {
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--dark);
}

.frame-gallery {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    max-height: 280px;
    overflow-y: auto;
}

.frame-item {
    border: 2px solid transparent;
    border-radius: 8px;
    padding: 8px;
    cursor: pointer;
    text-align: center;
    transition: border-color 0.2s;
    background: var(--light);
}

.frame-item.active {
    border-color: var(--primary);
}

.frame-item img {
    width: 100%;
    height: 60px;
    object-fit: contain;
}

.frame-item-name {
    font-size: 11px;
    display: block;
    margin-top: 4px;
    color: var(--gray);
}

.adjust-controls {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
}

.adjust-btn {
    padding: 10px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    background: #fff;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.2s;
}

.adjust-btn:hover {
    background: var(--light);
}

.frame-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.pd-display {
    background: linear-gradient(135deg, #eef2ff, #faf5ff);
    padding: 12px;
    border-radius: 8px;
    text-align: center;
}

.pd-display .pd-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

/* Toast */
.toast-notification {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--dark);
    color: #fff;
    padding: 14px 24px;
    border-radius: 8px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s;
    z-index: 9999;
}

.toast-notification.show {
    opacity: 1;
    transform: translateY(0);
}

/* Footer */
.footer {
    background: var(--dark);
    color: #94a3b8;
    padding: 40px 0 20px;
    margin-top: 60px;
}

.footer-trust {
    display: flex;
    justify-content: center;
    gap: 40px;
    padding: 20px 0;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.trust-item {
    text-align: center;
    font-size: 13px;
}

.trust-item i {
    display: block;
    font-size: 24px;
    margin-bottom: 4px;
    color: var(--primary);
}

/* Cart */
.cart-item {
    display: flex;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid #e2e8f0;
}

.cart-item img {
    width: 80px;
    height: 60px;
    object-fit: contain;
    background: var(--light);
    border-radius: 8px;
}

/* Profile */
.history-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.history-card {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.history-card img {
    width: 100%;
    height: 150px;
    object-fit: cover;
}

.capture-preview {
    width: 100%;
    border-radius: 8px;
    margin-top: 8px;
}

/* Responsive - Mobile try-on */
@media (max-width: 991.98px) {
    .tryon-page-wrap {
        height: 100dvh;
    }

    .tryon-container {
        grid-template-columns: 1fr;
        gap: 0;
        flex: 1;
    }

    .tryon-viewport {
        border-radius: 0;
        aspect-ratio: unset;
        flex: 1;
        width: 100%;
        min-height: 0;
    }

    .mode-toggle {
        top: 12px;
    }

    .btn-flip-camera {
        top: 12px;
        left: 10px;
    }

    .face-status {
        top: 56px;
    }

    .btn-capture {
        bottom: 16px;
        width: 60px;
        height: 60px;
        font-size: 24px;
    }

    .tryon-mobile-frames {
        bottom: 82px;
    }

    body.tryon-page .toast-notification {
        bottom: calc(80px + env(safe-area-inset-bottom));
        left: 50%;
        right: auto;
        transform: translateX(-50%) translateY(20px);
    }

    body.tryon-page .toast-notification.show {
        transform: translateX(-50%) translateY(0);
    }
}

@media (min-width: 992px) {
    body.tryon-page {
        overflow: auto;
        background: #f8fafc;
    }

    .tryon-page-wrap {
        height: auto;
        min-height: calc(100vh - 80px);
        background: #f8fafc;
        padding: 16px 24px;
    }

    .tryon-app {
        max-width: 1200px;
        margin: 0 auto;
    }

    .tryon-container {
        min-height: calc(100vh - 180px);
    }

    .face-status {
        top: 70px;
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
}