/* 
   ROMEO & JULIET - Brand VI 1.0 
   AI-Native Entertainment & Beauty Company 
*/

:root {
    /* Color System */
    --c-midnight: #080A1F;
    --c-midnight-card: #0D0F2B;
    --c-midnight-surface: #1A1D3A;
    
    --c-pearl: #F8F7FF;
    --c-pearl-dim: #C8C5D4;
    
    --c-violet: #6A06BB;
    --c-magenta: #9F04CA;
    --c-cyan: #04F8F3;
    
    --c-highlight-violet: #6F0BFF;
    --c-highlight-magenta: #FD08EB;
    --c-highlight-cyan: #01FFEE;

    /* Gradients */
    --g-brand: linear-gradient(135deg, var(--c-violet) 0%, var(--c-magenta) 50%, var(--c-cyan) 100%);
    --g-brand-hover: linear-gradient(135deg, var(--c-highlight-violet) 0%, var(--c-highlight-magenta) 50%, var(--c-highlight-cyan) 100%);
    
    /* Typography */
    --font-en: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-zh: 'Noto Sans SC', var(--font-en);
    
    /* Base Sizes (EN) */
    --text-hero: clamp(48px, 6vw, 72px);
    --text-h1: clamp(40px, 5vw, 56px);
    --text-h2: clamp(32px, 4vw, 40px);
    --text-h3: clamp(24px, 3vw, 32px);
    --text-body: 16px;
    --text-caption: 12px;
    
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 48px;
    --spacing-xl: 80px;
    --spacing-xxl: 120px;

    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-pill: 999px;

    --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    
    /* Z-index */
    --z-nav: 100;
    --z-toast: 200;
}

/* Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--c-midnight);
    color: var(--c-pearl);
    font-family: var(--font-en);
    font-size: var(--text-body);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Language Specific Adjustments */
body.lang-zh {
    font-family: var(--font-zh);
}
body.lang-zh .hero-title { letter-spacing: 2px; }
body.lang-zh .section-title { letter-spacing: 1px; }

/* Global Utilities */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-padding {
    padding: var(--spacing-xxl) 0;
}

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

h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    font-weight: 700;
    letter-spacing: -0.02em;
}

h2.section-title {
    font-size: var(--text-h2);
    margin-bottom: var(--spacing-lg);
}

a {
    color: var(--c-pearl);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--c-cyan);
}

ul { list-style: none; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    font-size: var(--text-body);
    font-weight: 600;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: all var(--transition);
    border: none;
    outline: none;
}

.btn-primary {
    background: var(--g-brand);
    color: var(--c-pearl);
}

.btn-primary:hover {
    background: var(--g-brand-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(106, 6, 187, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--c-pearl);
    border: 1px solid rgba(248, 247, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(248, 247, 255, 0.05);
    border-color: var(--c-cyan);
    color: var(--c-cyan);
}

.btn-notify {
    background: rgba(255,255,255,0.1);
    color: var(--c-pearl);
    padding: 10px 20px;
    font-size: 14px;
    border: 1px solid rgba(255,255,255,0.1);
}
.btn-notify:hover {
    background: rgba(255,255,255,0.2);
    border-color: var(--c-pearl);
}

.btn-block {
    width: 100%;
}

/* Glassmorphism */
.glass {
    background: rgba(13, 15, 43, 0.6);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(248, 247, 255, 0.05);
    border-radius: var(--radius-lg);
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: var(--z-nav);
    background: rgba(8, 10, 31, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition);
}

.nav-inner {
    height: 72px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-logo-img {
    height: 32px;
    width: auto;
}

.nav-logo-text {
    font-weight: 600;
    font-size: 18px;
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--c-pearl-dim);
}

.nav-link:hover, .nav-link.active {
    color: var(--c-pearl);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.lang-toggle {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    color: var(--c-pearl);
    padding: 6px 12px;
    border-radius: var(--radius-pill);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    align-self: center; /* Important for mobile alignment */
    line-height: 1;
}

.lang-toggle:hover {
    background: rgba(255,255,255,0.2);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 24px;
    height: 24px;
    position: relative;
    z-index: calc(var(--z-nav) + 1);
}

.hamburger, .hamburger::before, .hamburger::after {
    content: '';
    display: block;
    width: 24px;
    height: 2px;
    background: var(--c-pearl);
    transition: var(--transition);
    position: absolute;
}
.hamburger { top: 11px; }
.hamburger::before { top: -6px; }
.hamburger::after { top: 6px; }

.mobile-menu-btn.active .hamburger { background: transparent; }
.mobile-menu-btn.active .hamburger::before { transform: rotate(45deg); top: 0; }
.mobile-menu-btn.active .hamburger::after { transform: rotate(-45deg); top: 0; }

.mobile-menu {
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    height: calc(100vh - 72px);
    background: var(--c-midnight);
    padding: var(--spacing-lg) var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition);
}

.mobile-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
}

.mobile-menu .nav-link {
    font-size: 24px;
    font-weight: 600;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 72px; /* Nav offset */
    overflow: hidden;
}

.particles {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(106, 6, 187, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 85% 30%, rgba(4, 248, 243, 0.1) 0%, transparent 50%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    padding: 0 var(--spacing-md);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-logo-container {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 0 auto var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-logo {
    width: 100%;
    height: auto;
    position: relative;
    z-index: 2;
}

/* Pulse Rings Animation */
.pulse-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    border: 1px solid var(--c-cyan);
    opacity: 0;
    animation: pulse 4s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
}

.pulse-ring-1 { width: 100%; height: 100%; animation-delay: 0s; }
.pulse-ring-2 { width: 100%; height: 100%; animation-delay: 1.3s; }
.pulse-ring-3 { width: 100%; height: 100%; animation-delay: 2.6s; }

@keyframes pulse {
    0% { transform: translate(-50%, -50%) scale(0.8); opacity: 0.8; border-width: 2px; }
    100% { transform: translate(-50%, -50%) scale(2.5); opacity: 0; border-width: 0px; }
}

.hero-title {
    font-size: var(--text-hero);
    margin-bottom: var(--spacing-md);
    background: var(--g-brand);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(18px, 2vw, 24px);
    color: var(--c-pearl-dim);
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
    font-weight: 300;
}

.hero-ctas {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

/* Manifesto */
.manifesto-content {
    max-width: 800px;
    margin: 0 auto;
}

.manifesto-content p {
    font-size: clamp(18px, 2vw, 24px);
    color: var(--c-pearl-dim);
    margin-bottom: var(--spacing-md);
    font-weight: 300;
}

.manifesto-highlight {
    font-size: clamp(24px, 3vw, 32px) !important;
    color: var(--c-pearl) !important;
    font-weight: 500 !important;
    margin-top: var(--spacing-lg);
}

/* Video Section */
.brand-video {
    background: linear-gradient(to bottom, transparent, rgba(106,6,187,0.02), transparent);
}

.video-wrapper {
    position: relative;
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 16 / 9;
    background: #000;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.video-wrapper video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.video-loading {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--c-midnight-card);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: opacity 0.5s;
}

.pulse-ring-loader {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--c-cyan);
    border-top-color: transparent;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-sm);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-text {
    font-size: 14px;
    color: var(--c-pearl-dim);
    letter-spacing: 1px;
}

.video-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(8, 10, 31, 0.4);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 5;
    transition: opacity 0.5s, visibility 0.5s;
}

.video-wrapper.is-playing .video-overlay {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.play-btn {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: var(--spacing-md);
}

.play-btn:hover {
    background: var(--g-brand);
    transform: scale(1.1);
    border-color: transparent;
}

.play-icon {
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 12px 0 12px 20px;
    border-color: transparent transparent transparent var(--c-pearl);
    margin-left: 6px; /* visually center the triangle */
}

.video-title {
    font-size: 20px;
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

/* Product Matrix */
.products-layout {
    display: flex;
    gap: var(--spacing-xxl);
    align-items: flex-start;
}

.products-header {
    flex: 1;
    position: relative;
    height: 100%; /* For sticky to work relative to parent */
}

.sticky-wrapper {
    position: sticky;
    top: 120px; /* Offset from nav */
}

.convergence-lines {
    width: 100px;
    height: 100px;
    background: repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(106,6,187,0.2) 10px, rgba(106,6,187,0.2) 11px);
    margin-top: var(--spacing-lg);
    border-radius: 50%;
}

.products-grid {
    flex: 2;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.product-card {
    padding: var(--spacing-lg);
    position: relative;
    overflow: hidden;
    transition: transform var(--transition);
}

.product-card:hover {
    transform: translateY(-5px);
}

/* Card Hover Gradients based on theme */
.product-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    opacity: 0;
    transition: opacity var(--transition);
    z-index: 0;
    pointer-events: none;
}
.product-card[data-theme="neon"]::before { background: radial-gradient(circle at top right, rgba(106,6,187,0.15), transparent 70%); }
.product-card[data-theme="dreamy"]::before { background: radial-gradient(circle at bottom left, rgba(159,4,202,0.15), transparent 70%); }
.product-card[data-theme="rhythmic"]::before { background: radial-gradient(circle at center, rgba(4,248,243,0.1), transparent 70%); }
.product-card[data-theme="luminous"]::before { background: linear-gradient(135deg, rgba(255,255,255,0.05), transparent); }

.product-card:hover::before { opacity: 1; }

.product-card > * { position: relative; z-index: 1; }

.card-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: rgba(255,255,255,0.1);
    padding: 4px 12px;
    border-radius: var(--radius-pill);
    font-size: 12px;
    font-weight: 600;
    color: var(--c-pearl-dim);
}

.product-name {
    font-size: var(--text-h3);
    margin-bottom: var(--spacing-xs);
}

.product-desc {
    color: var(--c-pearl-dim);
    margin-bottom: var(--spacing-md);
}

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: var(--spacing-lg);
}

.product-tags span {
    font-size: 12px;
    padding: 4px 10px;
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 4px;
    color: var(--c-pearl-dim);
}

/* Why Us */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.feature-item {
    text-align: center;
    padding: var(--spacing-md);
}

.feature-icon-wrapper {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-md);
    border-radius: 50%;
    background: rgba(255,255,255,0.05);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-dot {
    width: 16px;
    height: 16px;
    border-radius: 50%;
}
.feature-dot.ai { background: var(--c-cyan); box-shadow: 0 0 15px var(--c-cyan); }
.feature-dot.joy { background: var(--c-magenta); box-shadow: 0 0 15px var(--c-magenta); }
.feature-dot.global { background: var(--c-violet); box-shadow: 0 0 15px var(--c-violet); }
.feature-dot.cities { background: var(--g-brand); }

.feature-title {
    font-size: 20px;
    margin-bottom: var(--spacing-xs);
}

.feature-desc {
    color: var(--c-pearl-dim);
    font-size: 14px;
}

/* Careers */
.careers {
    background: linear-gradient(to bottom, transparent, rgba(106,6,187,0.05), transparent);
}
.careers-desc {
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
    font-size: 20px;
    color: var(--c-pearl-dim);
}

/* Contact */
.contact-layout {
    display: flex;
    gap: var(--spacing-xxl);
}

.contact-info {
    flex: 1;
}

.contact-emails {
    margin-top: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.email-group h4 {
    color: var(--c-pearl-dim);
    font-size: 14px;
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.email-group a {
    font-size: 20px;
    font-weight: 500;
}

.contact-form-wrapper {
    flex: 1.5;
    padding: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 14px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    color: var(--c-pearl);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 16px; /* Prevents iOS zoom */
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--c-cyan);
    background: rgba(255,255,255,0.08);
}

/* Footer */
.footer {
    border-top: 1px solid rgba(255,255,255,0.05);
    padding: var(--spacing-lg) 0;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-logo {
    height: 24px;
}

.footer-company {
    font-size: 14px;
    font-weight: 600;
}

.footer-center {
    display: flex;
    gap: 12px;
    color: var(--c-pearl-dim);
    font-size: 14px;
}
.footer-center .dot { opacity: 0.5; }

.footer-right {
    font-size: 12px;
    color: var(--c-pearl-dim);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--c-midnight-surface);
    color: var(--c-pearl);
    padding: 12px 24px;
    border-radius: var(--radius-pill);
    border: 1px solid rgba(255,255,255,0.1);
    font-size: 14px;
    font-weight: 500;
    z-index: var(--z-toast);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast.error {
    background: #3a1a1a;
    border-color: rgba(255, 90, 90, 0.4);
    color: #ffd6d6;
}

/* Animations */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

/* Responsive Design */
@media (max-width: 992px) {
    .products-layout {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    .products-header {
        position: static;
    }
    .sticky-wrapper {
        position: static;
    }
    .contact-layout {
        flex-direction: column;
    }
    .footer-inner {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .mobile-menu-btn { display: block; }
    
    .hero-ctas {
        flex-direction: column;
        width: 100%;
        max-width: 300px;
    }
    .hero-logo-container {
        width: 150px;
        height: 150px;
    }
    
    .section-padding { padding: var(--spacing-xl) 0; }
}