/* ============================================================
   LifeLink Website — Design System & Styles
   ============================================================ */

/* ===== Design Tokens ===== */
:root {
    --bg-primary: #070b14;
    --bg-secondary: #0d1321;
    --bg-card: rgba(15, 23, 42, 0.65);
    --bg-card-hover: rgba(20, 30, 55, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.03);

    --cyan: #22d3ee;
    --cyan-dim: rgba(34, 211, 238, 0.15);
    --cyan-glow: rgba(34, 211, 238, 0.4);
    --teal: #14b8a6;
    --blue: #3b82f6;
    --purple: #8b5cf6;
    --pink: #ec4899;
    --red: #ef4444;
    --red-glow: rgba(239, 68, 68, 0.3);
    --green: #22c55e;
    --amber: #f59e0b;

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --border: rgba(148, 163, 184, 0.08);
    --border-hover: rgba(34, 211, 238, 0.2);

    --gradient-main: linear-gradient(135deg, #22d3ee 0%, #3b82f6 50%, #8b5cf6 100%);
    --gradient-warm: linear-gradient(135deg, #ec4899 0%, #f59e0b 100%);
    --gradient-health: linear-gradient(135deg, #ef4444 0%, #ec4899 100%);

    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.5);
    --shadow-cyan: 0 0 30px rgba(34, 211, 238, 0.15);
    --shadow-glow: 0 0 60px rgba(34, 211, 238, 0.1);

    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    margin: 0; padding: 0; box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
    font-size: 16px;
}
body {
    font-family: var(--font-primary);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }

/* ===== Utilities ===== */
.gradient-text {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.accent { color: var(--cyan); }
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ===== Navigation ===== */
#navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
    backdrop-filter: blur(0px);
}
#navbar.scrolled {
    padding: 0.6rem 0;
    background: rgba(7, 11, 20, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border);
}
.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}
.nav-logo-img {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}
.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 0.3rem 0;
}
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px; left: 0;
    width: 0; height: 2px;
    background: var(--gradient-main);
    border-radius: 1px;
    transition: var(--transition);
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { width: 100%; }
.nav-cta {
    background: var(--cyan-dim) !important;
    color: var(--cyan) !important;
    padding: 0.45rem 1.2rem !important;
    border-radius: var(--radius-sm) !important;
    border: 1px solid rgba(34, 211, 238, 0.2) !important;
}
.nav-cta:hover {
    background: rgba(34, 211, 238, 0.25) !important;
    border-color: rgba(34, 211, 238, 0.4) !important;
}
.nav-cta::after { display: none !important; }
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.nav-toggle span {
    width: 24px; height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== Hero ===== */
#hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 8rem 0 4rem;
    overflow: hidden;
}
.hero-bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(34, 211, 238, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(34, 211, 238, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 30%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 30%, transparent 100%);
}
.hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.4;
    pointer-events: none;
}
.hero-glow-1 {
    width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(34, 211, 238, 0.3), transparent 70%);
    top: -10%; right: 10%;
    animation: floatGlow 8s ease-in-out infinite;
}
.hero-glow-2 {
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.25), transparent 70%);
    bottom: 0; left: 5%;
    animation: floatGlow 10s ease-in-out infinite reverse;
}
@keyframes floatGlow {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -20px) scale(1.1); }
}
.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    padding: 0.4rem 1rem;
    border-radius: 100px;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    backdrop-filter: blur(8px);
}
.badge-dot {
    width: 8px; height: 8px;
    background: var(--green);
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.5); }
    50% { opacity: 0.7; box-shadow: 0 0 0 6px rgba(34, 197, 94, 0); }
}
.hero-content h1 {
    font-size: clamp(2.8rem, 5vw, 4.2rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
}
.hero-line { display: block; }
.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 520px;
    line-height: 1.7;
    margin-bottom: 2rem;
}
.hero-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}
/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 1.8rem;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}
.btn-primary {
    background: var(--gradient-main);
    color: #fff;
    box-shadow: 0 4px 20px rgba(34, 211, 238, 0.3);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(34, 211, 238, 0.4);
}
.btn-secondary {
    background: var(--bg-glass);
    color: var(--text-primary);
    border: 1px solid var(--border);
    backdrop-filter: blur(8px);
}
.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
}
/* Stats */
.hero-stats {
    display: flex;
    align-items: center;
    gap: 2rem;
}
.stat-value {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-primary);
    display: block;
}
.stat-unit { font-size: 0.9rem; color: var(--cyan); }
.stat-label {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.stat-divider {
    width: 1px; height: 40px;
    background: var(--border);
}

/* Watch Visual */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}
.watch-showcase {
    position: relative;
    width: 380px;
    height: 380px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.watch-image {
    width: 280px;
    height: 280px;
    border-radius: 50%;
    object-fit: cover;
    position: relative;
    z-index: 2;
    box-shadow: 0 0 60px rgba(34, 211, 238, 0.15), 0 0 120px rgba(34, 211, 238, 0.05);
}
.watch-ring {
    position: absolute;
    width: 320px; height: 320px;
    border-radius: 50%;
    border: 1px solid rgba(34, 211, 238, 0.15);
    animation: ringPulse 4s ease-in-out infinite;
}
.watch-ring-2 {
    width: 370px; height: 370px;
    border-color: rgba(139, 92, 246, 0.08);
    animation-delay: 2s;
}
@keyframes ringPulse {
    0%, 100% { transform: scale(1); opacity: 0.6; }
    50% { transform: scale(1.05); opacity: 1; }
}
.floating-card {
    position: absolute;
    z-index: 3;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border);
    padding: 0.6rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 600;
    box-shadow: var(--shadow-md);
    animation: floatCard 6s ease-in-out infinite;
}
.fc-value small { font-weight: 400; color: var(--text-muted); }
.fc-bpm {
    top: 10%; right: -15%;
    animation-delay: 0s;
}
.fc-spo2 {
    bottom: 15%; right: -10%;
    animation-delay: 1.5s;
}
.fc-gps {
    top: 40%; left: -15%;
    animation-delay: 3s;
}
@keyframes floatCard {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* Scroll indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    animation: fadeInUp 1s ease 1.5s both;
}
.mouse {
    width: 22px; height: 34px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    position: relative;
}
.mouse-wheel {
    width: 3px; height: 8px;
    background: var(--cyan);
    border-radius: 2px;
    position: absolute;
    top: 6px; left: 50%;
    transform: translateX(-50%);
    animation: scrollWheel 2s ease-in-out infinite;
}
@keyframes scrollWheel {
    0% { transform: translateX(-50%) translateY(0); opacity: 1; }
    100% { transform: translateX(-50%) translateY(10px); opacity: 0; }
}

/* ===== Sections Common ===== */
section {
    padding: 7rem 0;
    position: relative;
}
section:nth-child(even) {
    background: var(--bg-secondary);
}
.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 4rem;
}
.section-tag {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--cyan);
    background: var(--cyan-dim);
    padding: 0.35rem 1rem;
    border-radius: 100px;
    margin-bottom: 1rem;
}
.section-header h2 {
    font-size: clamp(2rem, 3.5vw, 2.8rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
    line-height: 1.2;
}
.section-header p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== Features Grid ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}
.feature-card-large {
    grid-column: span 3;
}
.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: var(--transition);
    backdrop-filter: blur(8px);
    position: relative;
    overflow: hidden;
}
.feature-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--gradient-main);
    opacity: 0;
    transition: var(--transition);
}
.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-cyan);
}
.feature-card:hover::before { opacity: 1; }
.feature-icon {
    width: 56px; height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.2rem;
}
.fi-fall { background: rgba(59, 130, 246, 0.12); color: var(--blue); }
.fi-heart { background: rgba(239, 68, 68, 0.12); color: var(--red); }
.fi-sms { background: rgba(34, 211, 238, 0.12); color: var(--cyan); }
.fi-ui { background: rgba(139, 92, 246, 0.12); color: var(--purple); }
.fi-sim { background: rgba(245, 158, 11, 0.12); color: var(--amber); }
.fi-ble { background: rgba(34, 197, 94, 0.12); color: var(--green); }
.feature-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.6rem;
}
.feature-card p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.65;
}
/* Feature phases */
.feature-phases {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}
.phase {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    padding: 0.8rem 1.2rem;
    border-radius: var(--radius-md);
}
.phase-num {
    width: 30px; height: 30px;
    background: var(--gradient-main);
    color: #fff;
    font-weight: 700;
    font-size: 0.85rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.phase span { font-size: 0.85rem; line-height: 1.3; }
.phase small { color: var(--text-muted); font-family: var(--font-mono); font-size: 0.75rem; }
.phase-arrow { color: var(--cyan); font-size: 1.4rem; font-weight: 300; }

/* ===== Tech Showcase ===== */
.tech-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}
.tech-image-wrap {
    position: relative;
    display: flex;
    justify-content: center;
}
.tech-image {
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 450px;
    position: relative;
    z-index: 1;
}
.tech-image-glow {
    position: absolute;
    width: 80%; height: 80%;
    top: 10%; left: 10%;
    background: radial-gradient(circle, rgba(34, 211, 238, 0.15), transparent 70%);
    filter: blur(60px);
    z-index: 0;
}
.tech-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}
.tech-item {
    display: flex;
    gap: 1.2rem;
    align-items: flex-start;
    padding: 1.2rem;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    border: 1px solid var(--border);
    transition: var(--transition);
}
.tech-item:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateX(6px);
}
.tech-item-icon {
    width: 48px; height: 48px;
    background: var(--cyan-dim);
    color: var(--cyan);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.tech-item h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
}
.tech-item p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ===== Algorithms ===== */
.algo-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}
.algo-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}
.algo-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-cyan);
}
.algo-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-glass);
}
.algo-icon {
    width: 48px; height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}
.algo-icon-fft { background: rgba(239, 68, 68, 0.12); color: var(--red); }
.algo-icon-fall { background: rgba(59, 130, 246, 0.12); color: var(--blue); }
.algo-header h3 { font-size: 1.1rem; font-weight: 700; }
.algo-body { padding: 1.5rem 2rem 2rem; }
.algo-body > p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.65;
    margin-bottom: 1.5rem;
}
.algo-specs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.8rem;
    margin-bottom: 1.2rem;
}
.algo-spec {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 0.8rem;
    background: var(--bg-glass);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}
.spec-label { font-size: 0.8rem; color: var(--text-muted); }
.spec-value { font-size: 0.85rem; font-weight: 600; color: var(--cyan); font-family: var(--font-mono); }
.algo-formula {
    background: rgba(34, 211, 238, 0.05);
    border: 1px solid rgba(34, 211, 238, 0.1);
    border-radius: var(--radius-sm);
    padding: 0.8rem 1rem;
    margin-bottom: 0.8rem;
}
.formula-label {
    display: block;
    font-size: 0.72rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.3rem;
}
.algo-formula code {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--cyan);
}

/* ===== Hardware Grid ===== */
.hw-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}
.hw-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.hw-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-6px);
    box-shadow: var(--shadow-cyan);
}
.hw-icon {
    width: 72px; height: 72px;
    margin: 0 auto 1.2rem;
    background: var(--cyan-dim);
    color: var(--cyan);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}
.hw-card h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}
.hw-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 1rem;
}
.hw-tag {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--cyan);
    background: var(--cyan-dim);
    padding: 0.25rem 0.8rem;
    border-radius: 100px;
}

/* ===== Screens Flow ===== */
.screens-flow {
    display: flex;
    align-items: stretch;
    gap: 0;
    overflow-x: auto;
    padding: 1rem 0;
    scrollbar-width: thin;
    scrollbar-color: var(--cyan-dim) transparent;
}
.screen-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    min-width: 220px;
    flex: 1;
    transition: var(--transition);
    position: relative;
}
.screen-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-4px);
}
.screen-card-alert {
    border-color: rgba(239, 68, 68, 0.2);
}
.screen-card-alert:hover {
    border-color: rgba(239, 68, 68, 0.4);
    box-shadow: 0 0 30px rgba(239, 68, 68, 0.1);
}
.screen-number {
    font-size: 2.2rem;
    font-weight: 900;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.8rem;
    line-height: 1;
}
.screen-card h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}
.screen-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.55;
    margin-bottom: 1rem;
}
.screen-tag {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--cyan);
    background: var(--cyan-dim);
    padding: 0.25rem 0.7rem;
    border-radius: 100px;
}
.screen-tag-alert {
    color: var(--red);
    background: rgba(239, 68, 68, 0.12);
}
.screen-connector {
    display: flex;
    align-items: center;
    padding: 0 0.5rem;
    flex-shrink: 0;
}

/* ===== Footer ===== */
#contact {
    position: relative;
    background: var(--bg-primary);
    padding: 5rem 0 0;
    overflow: hidden;
}
.footer-glow {
    position: absolute;
    top: -100px; left: 50%;
    transform: translateX(-50%);
    width: 600px; height: 200px;
    background: radial-gradient(ellipse, rgba(34, 211, 238, 0.08), transparent 70%);
    filter: blur(60px);
}
.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid var(--border);
}
.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}
.footer-logo-img {
    width: 36px; height: 36px;
    border-radius: 8px;
}
.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    max-width: 320px;
}
.footer-links-group h5 {
    font-size: 0.82rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 1rem;
}
.footer-links-group ul {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}
.footer-links-group a {
    font-size: 0.9rem;
    color: var(--text-secondary);
}
.footer-links-group a:hover {
    color: var(--cyan);
}
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
}
.footer-bottom p {
    font-size: 0.82rem;
    color: var(--text-muted);
}
.footer-built {
    color: var(--text-muted);
}

/* ===== Animations ===== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
[data-aos="fade-up"] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-aos="fade-up"].aos-animate {
    opacity: 1;
    transform: translateY(0);
}
[data-aos="fade-right"] {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-aos="fade-right"].aos-animate {
    opacity: 1;
    transform: translateX(0);
}
[data-aos="fade-left"] {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-aos="fade-left"].aos-animate {
    opacity: 1;
    transform: translateX(0);
}
.hero-content {
    animation: fadeInUp 0.8s ease both;
}
.hero-visual {
    animation: fadeInUp 0.8s ease 0.3s both;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }
    .hero-description { margin: 0 auto 2rem; }
    .hero-actions { justify-content: center; }
    .hero-stats { justify-content: center; }
    .tech-showcase { grid-template-columns: 1fr; gap: 3rem; }
    .algo-grid { grid-template-columns: 1fr; }
    .footer-content { grid-template-columns: 1fr 1fr; gap: 2rem; }
}
@media (max-width: 768px) {
    section { padding: 5rem 0; }
    .features-grid { grid-template-columns: 1fr; }
    .feature-card-large { grid-column: span 1; }
    .hw-grid { grid-template-columns: 1fr 1fr; }
    .screens-flow {
        flex-direction: column;
        gap: 1rem;
    }
    .screen-connector {
        transform: rotate(90deg);
        padding: 0.5rem 0;
        justify-content: center;
    }
    .nav-links {
        display: none;
        position: absolute;
        top: 100%; left: 0; right: 0;
        flex-direction: column;
        background: rgba(7, 11, 20, 0.95);
        backdrop-filter: blur(20px);
        padding: 1.5rem 2rem;
        gap: 1rem;
        border-bottom: 1px solid var(--border);
    }
    .nav-links.open { display: flex; }
    .nav-toggle { display: flex; }
    .nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .nav-toggle.open span:nth-child(2) { opacity: 0; }
    .nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
    .footer-content { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; gap: 0.5rem; text-align: center; }
    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }
    .stat-divider {
        width: 40px; height: 1px;
    }
    .watch-showcase {
        width: 300px; height: 300px;
    }
    .watch-image { width: 220px; height: 220px; }
    .watch-ring { width: 260px; height: 260px; }
    .watch-ring-2 { width: 290px; height: 290px; }
    .floating-card { display: none; }
}
@media (max-width: 480px) {
    .hw-grid { grid-template-columns: 1fr; }
    .feature-phases { flex-direction: column; }
    .phase-arrow { transform: rotate(90deg); }
    .algo-specs { grid-template-columns: 1fr; }
}