/* ===== Design System ===== */
:root {
    /* Backgrounds */
    --bg-primary: #050507;
    --bg-surface-1: #0c0c0f;
    --bg-surface-2: #141419;
    --bg-surface-3: #1c1c24;
    --bg-glass: rgba(255, 255, 255, 0.03);
    --bg-glass-hover: rgba(255, 255, 255, 0.06);
    
    /* Text */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.5);
    --text-tertiary: rgba(255, 255, 255, 0.3);
    
    /* Macro Accents */
    --protein: #ff6b6b;
    --protein-glow: rgba(255, 107, 107, 0.4);
    --carbs: #4ecdc4;
    --carbs-glow: rgba(78, 205, 196, 0.4);
    --fat: #ffe66d;
    --fat-glow: rgba(255, 230, 109, 0.4);
    --water: #4a9fff;
    --water-glow: rgba(74, 159, 255, 0.4);
    
    /* Accent */
    --accent: #4ecdc4;
    --accent-glow: rgba(78, 205, 196, 0.3);
    
    /* Typography */
    --font-primary: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Spacing */
    --section-padding: clamp(80px, 12vw, 160px);
    --container-padding: clamp(20px, 5vw, 48px);
    --container-max: 1400px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===== Ambient Background ===== */
.ambient-bg {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.5;
    animation: float-orb 20s ease-in-out infinite;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--carbs-glow);
    top: -200px;
    right: -100px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: var(--protein-glow);
    bottom: -150px;
    left: -100px;
    animation-delay: -7s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: var(--water-glow);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -14s;
    opacity: 0.3;
}

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

/* ===== Header ===== */
.header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px var(--container-padding);
    background: transparent;
}

.header-logo {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.03em;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 40px;
}

.header-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.header-nav a:hover {
    color: var(--text-primary);
}

.nav-cta {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 10px 20px;
    border-radius: 100px;
    color: var(--text-primary) !important;
    transition: all var(--transition-fast);
}

.nav-cta:hover {
    background: var(--bg-glass-hover);
    border-color: rgba(255, 255, 255, 0.2);
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    padding: 140px var(--container-padding) 80px;
    gap: 60px;
    max-width: var(--container-max);
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 8px 16px 8px 12px;
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    animation: fadeInUp 0.8s ease forwards;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

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

.headline {
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin-bottom: 28px;
}

.headline .line {
    display: block;
    overflow: hidden;
}

.headline .word {
    display: inline-block;
    animation: slideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    animation-delay: calc(var(--delay) * 0.1s + 0.2s);
    opacity: 0;
    transform: translateY(100%);
}

.headline .accent {
    background: linear-gradient(135deg, var(--carbs) 0%, var(--water) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@keyframes slideUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 40px;
    max-width: 480px;
    animation: fadeInUp 0.8s ease 0.5s forwards;
    opacity: 0;
}

.hero-cta {
    display: flex;
    align-items: center;
    gap: 40px;
    animation: fadeInUp 0.8s ease 0.6s forwards;
    opacity: 0;
}

/* ===== App Store Button ===== */
.app-store-btn {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    background: var(--text-primary);
    color: var(--bg-primary);
    padding: 14px 28px;
    border-radius: 14px;
    text-decoration: none;
    transition: all var(--transition-base);
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.1);
}

.app-store-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 40px rgba(255, 255, 255, 0.2);
}

.btn-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.2;
}

.btn-small {
    font-size: 0.65rem;
    font-weight: 400;
    opacity: 0.7;
}

.btn-large {
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 24px;
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--font-mono);
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
}

/* ===== Hero Visual / Phone Mockup ===== */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 600px;
}

.phone-showcase {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Floating Cards */
.floating-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(20, 20, 25, 0.9);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 14px 18px;
    border-radius: 16px;
    z-index: 10;
    transition: transform 0.3s ease;
    animation: float 4s ease-in-out infinite;
}

.card-protein {
    top: 15%;
    left: 0;
    animation-delay: 0s;
}

.card-water {
    bottom: 20%;
    right: 0;
    animation-delay: -2s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.card-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-icon.protein {
    background: rgba(255, 107, 107, 0.15);
    color: var(--protein);
}

.card-icon.water {
    background: rgba(74, 159, 255, 0.15);
    color: var(--water);
}

.card-content {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.card-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.card-value {
    font-size: 1.1rem;
    font-weight: 600;
    font-family: var(--font-mono);
}

/* Device Frame */
.device-wrapper {
    position: relative;
    z-index: 5;
}

.device-frame {
    position: relative;
    width: 280px;
    background: linear-gradient(165deg, #2a2a30 0%, #18181c 50%, #0c0c0f 100%);
    border-radius: 50px;
    padding: 12px;
    box-shadow: 
        0 0 0 1px rgba(255, 255, 255, 0.1),
        0 50px 100px -20px rgba(0, 0, 0, 0.8),
        0 30px 60px -30px rgba(0, 0, 0, 0.6),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    animation: deviceFloat 6s ease-in-out infinite;
}

@keyframes deviceFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-15px) rotate(1deg); }
}

.device-header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding-top: 12px;
    z-index: 10;
}

.dynamic-island {
    width: 100px;
    height: 32px;
    background: #000;
    border-radius: 20px;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.05);
}

.device-screen {
    position: relative;
    width: 100%;
    border-radius: 38px;
    overflow: hidden;
    background: #000;
    aspect-ratio: 9/19.5;
}

.device-screen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.device-footer {
    position: absolute;
    bottom: 28px;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    z-index: 10;
}

.home-indicator {
    width: 100px;
    height: 4px;
    background: rgba(255, 255, 255, 0.35);
    border-radius: 3px;
}

.device-shadow {
    position: absolute;
    bottom: -40px;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 20px;
    background: radial-gradient(ellipse, rgba(78, 205, 196, 0.3) 0%, transparent 70%);
    filter: blur(15px);
}

/* Secondary Device */
.device-secondary {
    position: absolute;
    right: -60px;
    top: 50%;
    transform: translateY(-50%) rotate(8deg) scale(0.85);
    z-index: 3;
    opacity: 0.7;
}

.device-secondary .device-frame {
    animation: deviceFloat 6s ease-in-out infinite;
    animation-delay: -3s;
}

/* ===== Features Section ===== */
.features {
    padding: var(--section-padding) var(--container-padding);
    max-width: var(--container-max);
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.features-header,
.reviews-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent);
    margin-bottom: 16px;
    font-family: var(--font-mono);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.feature-card {
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 24px;
    padding: 32px;
    transition: all var(--transition-base);
}

.feature-card:hover {
    background: var(--bg-glass-hover);
    border-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-4px);
}

.feature-large {
    grid-column: span 2;
    grid-row: span 2;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 40px;
}

.feature-visual {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 32px;
}

/* Macro Display */
.macro-display {
    display: flex;
    flex-direction: column;
    gap: 32px;
    width: 100%;
    max-width: 320px;
}

.macro-bars {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.macro-bar {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.bar-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.bar-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.bar-value {
    font-size: 0.9rem;
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--text-primary);
}

.bar-track {
    height: 8px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 100px;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    border-radius: 100px;
    width: 0;
    animation: barFill 1s ease-out forwards;
    animation-delay: 0.5s;
}

.bar-fill.protein {
    background: linear-gradient(90deg, var(--protein), #ff8a8a);
}

.bar-fill.carbs {
    background: linear-gradient(90deg, var(--carbs), #7ee8e1);
    animation-delay: 0.65s;
}

.bar-fill.fat {
    background: linear-gradient(90deg, var(--fat), #fff0a0);
    animation-delay: 0.8s;
}

@keyframes barFill {
    to { width: var(--progress); }
}

.macro-total {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.macro-cal {
    font-size: 3rem;
    font-weight: 700;
    font-family: var(--font-mono);
    letter-spacing: -0.03em;
    line-height: 1;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.macro-label {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    margin-top: 6px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: var(--bg-surface-2);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--accent);
}

.feature-content h3,
.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.feature-content p,
.feature-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== Reviews Section ===== */
.reviews {
    padding: var(--section-padding) 0;
    position: relative;
    z-index: 1;
    overflow: hidden;
}

.reviews-header {
    padding: 0 var(--container-padding);
}

.reviews-marquee {
    position: relative;
    width: 100%;
    overflow: hidden;
    mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.marquee-track {
    display: flex;
    gap: 24px;
    animation: marquee 40s linear infinite;
    width: max-content;
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.review-card {
    flex-shrink: 0;
    width: 360px;
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 20px;
    padding: 28px;
}

.review-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 16px;
}

.reviewer-avatar {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--carbs) 0%, var(--water) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--bg-primary);
}

.reviewer-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.reviewer-name {
    font-weight: 600;
    font-size: 0.95rem;
}

.stars {
    color: var(--fat);
    font-size: 0.85rem;
    letter-spacing: 2px;
}

.review-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== CTA Section ===== */
.cta-section {
    position: relative;
    padding: var(--section-padding) var(--container-padding);
    text-align: center;
    z-index: 1;
    overflow: hidden;
}

.cta-content {
    position: relative;
    z-index: 2;
    max-width: 600px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.app-store-btn-large {
    padding: 18px 36px;
}

.app-store-btn-large .btn-large {
    font-size: 1.25rem;
}

.cta-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 60%);
    filter: blur(80px);
    opacity: 0.5;
    pointer-events: none;
}

/* ===== Footer ===== */
.footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 48px var(--container-padding);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.03em;
}

.footer-tagline {
    font-size: 0.9rem;
    color: var(--text-tertiary);
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--text-primary);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    padding: 24px var(--container-padding);
    text-align: center;
}

.copyright {
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

/* ===== Scroll Animations ===== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

.feature-card.animate-on-scroll {
    transition-delay: calc(var(--stagger, 0) * 0.1s);
}

/* ===== Responsive Design ===== */
@media (max-width: 1200px) {
    .device-secondary {
        display: none;
    }
    
    .floating-card.card-water {
        right: -20px;
    }
    
    .floating-card.card-protein {
        left: -20px;
    }
}

@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 60px;
        padding-top: 120px;
    }
    
    .hero-content {
        max-width: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .hero-subtitle {
        max-width: 100%;
    }
    
    .hero-cta {
        flex-direction: column;
        gap: 32px;
    }
    
    .hero-visual {
        order: 2;
        min-height: 500px;
    }
    
    .features-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .feature-large {
        grid-column: span 2;
        grid-row: span 1;
    }
}

@media (max-width: 768px) {
    .header-nav a:not(.nav-cta) {
        display: none;
    }
    
    .headline {
        font-size: 2.5rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-large {
        grid-column: span 1;
    }
    
    .device-frame {
        width: 260px;
        border-radius: 44px;
    }
    
    .dynamic-island {
        width: 90px;
        height: 28px;
    }
    
    .device-screen {
        border-radius: 34px;
    }
    
    .floating-card {
        display: none;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 32px;
        text-align: center;
    }
    
    .footer-brand {
        align-items: center;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 16px 20px;
    }
    
    .header-logo {
        font-size: 1.2rem;
    }
    
    .nav-cta {
        padding: 8px 16px;
        font-size: 0.85rem;
    }
    
    .hero {
        padding: 100px 20px 60px;
    }
    
    .headline {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .app-store-btn {
        padding: 12px 20px;
    }
    
    .btn-large {
        font-size: 1rem;
    }
    
    .hero-stats {
        gap: 16px;
    }
    
    .stat-value {
        font-size: 1.25rem;
    }
    
    .device-frame {
        width: 240px;
        border-radius: 40px;
        padding: 10px;
    }
    
    .device-screen {
        border-radius: 30px;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .feature-card {
        padding: 24px;
    }
    
    .review-card {
        width: 300px;
        padding: 24px;
    }
    
    .cta-content h2 {
        font-size: 2rem;
    }
    
    .cta-content p {
        font-size: 1rem;
    }
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .marquee-track {
        animation: none;
    }
}