/* ========================================
   LIGLOG - Minimal Tech Aesthetic
   极简 · 科技 · 专业
   ======================================== */

/* Design Tokens */
:root {
    /* Color Palette - Deep Blue & Teal (matching App UI) */
    --deep-space: #0B1120;
    --navy: #0a0f1e;
    --slate: #151e32;
    --teal: #14B8A6;
    --teal-light: #5EEAD4;
    --teal-dark: #0F766E;
    --sky: #38BDF8;
    --sky-dark: #0284C7;
    --cream: #f8fafc;
    --border: rgba(20, 184, 166, 0.2);

    /* Text Colors */
    --text-primary: #FFFFFF;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.4);
    --text-teal: #14B8A6;

    /* Gradients */
    --gradient-teal: linear-gradient(135deg, #5EEAD4 0%, #14B8A6 50%, #0F766E 100%);
    --gradient-sky: linear-gradient(135deg, #38BDF8 0%, #0284C7 100%);
    --gradient-bg: linear-gradient(180deg, #0B1120 0%, #0a0f1e 100%);
    --gradient-ambient: radial-gradient(ellipse at 30% 20%, rgba(20, 184, 166, 0.15) 0%, transparent 50%),
                        radial-gradient(ellipse at 70% 80%, rgba(56, 189, 248, 0.1) 0%, transparent 50%);

    /* Typography */
    --font-serif: 'Crimson Pro', Georgia, serif;
    --font-sans: 'IBM Plex Sans', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 40px;
    --space-2xl: 64px;
    --space-3xl: 96px;

    /* Layout */
    --container-max: 1400px;
    --section-padding: 88px;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Transitions */
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --duration-fast: 200ms;
    --duration-normal: 300ms;
    --duration-slow: 500ms;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: var(--gradient-ambient);
    pointer-events: none;
    z-index: 0;
    animation: ambientShift 15s ease-in-out infinite alternate;
}

@keyframes ambientShift {
    0% { opacity: 0.5; }
    100% { opacity: 1; }
}

/* ========================================
   Typography - Clean & Modern
   ======================================== */
h1, h2, h3, h4 {
    font-family: var(--font-sans);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

h1 { font-size: clamp(52px, 8vw, 80px); font-weight: 700; }
h2 { font-size: clamp(40px, 6vw, 56px); font-weight: 600; }
h3 { font-size: clamp(26px, 4vw, 36px); font-weight: 600; }
h4 { font-size: clamp(18px, 2.5vw, 24px); font-weight: 500; }

p {
    font-size: clamp(15px, 1.6vw, 17px);
    line-height: 1.7;
    color: var(--text-secondary);
}

.mono {
    font-family: var(--font-mono);
    font-variant-numeric: tabular-nums;
}

.italic {
    font-style: italic;
}

.desktop-only {
    display: inline;
}

@media (max-width: 768px) {
    .desktop-only { display: none; }
}

/* ========================================
   Layout
   ======================================== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 8%;
}

.section {
    padding: var(--section-padding) 0;
    position: relative;
    z-index: 1;
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    inset: 0;
    height: 64px;
    z-index: 1000;
    background: rgba(3, 7, 18, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(20, 184, 166, 0.1);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 8%;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    text-decoration: none;
}

.logo-text {
    font-family: var(--font-sans);
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: var(--space-xl);
}

.nav-link {
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    position: relative;
    padding: var(--space-sm) 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-teal);
    transition: width var(--duration-normal) var(--ease-smooth);
}

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

.nav-link:hover::after {
    width: 100%;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    padding-top: 140px;
    padding-bottom: 80px;
    position: relative;
    overflow: hidden;
}

.hero > .container {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: var(--space-xl);
}

/* Grid Background Pattern */
.grid-background {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(20, 184, 166, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(20, 184, 166, 0.04) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse 70% 70% at 30% 50%, black 0%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 70% 70% at 30% 50%, black 0%, transparent 70%);
}

/* Minimal Floating Shapes */
.organic-shapes {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.3;
    animation: float 20s ease-in-out infinite;
}

.shape-1 {
    top: 10%;
    right: 10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(20, 184, 166, 0.3) 0%, transparent 70%);
    animation-delay: 0s;
}

.shape-2 {
    bottom: 20%;
    left: 5%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.25) 0%, transparent 70%);
    animation-delay: -7s;
}

.shape-3 {
    top: 50%;
    left: 50%;
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(45, 212, 191, 0.2) 0%, transparent 70%);
    animation-delay: -14s;
}

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

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-label {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 500;
    color: var(--text-teal);
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

.label-dot {
    width: 6px;
    height: 6px;
    background: var(--teal);
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero-title {
    margin-bottom: var(--space-lg);
}

.title-line {
    display: block;
}

.title-accent {
    color: var(--teal);
}

.hero-description {
    margin-bottom: var(--space-2xl);
    font-size: 18px;
}

.hero-description .highlight {
    color: var(--text-teal);
    font-weight: 500;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
}

/* Buttons - Minimal Style */
.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-sans);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    border-radius: var(--radius-md);
    text-decoration: none;
    overflow: hidden;
    transition: all var(--duration-normal) var(--ease-smooth);
}

.btn-teal {
    background: var(--gradient-teal);
    color: var(--deep-space);
    box-shadow: 0 4px 20px rgba(20, 184, 166, 0.25);
}

.btn-teal:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(20, 184, 166, 0.35);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1.5px solid rgba(20, 184, 166, 0.3);
}

.btn-outline:hover {
    background: rgba(20, 184, 166, 0.05);
    border-color: var(--teal);
    transform: translateY(-2px);
}

.btn-large {
    padding: var(--space-lg) var(--space-2xl);
    font-size: 17px;
}

/* Hero Visual - Minimal Ring */
.hero-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 500px;
}

.ring-showcase {
    position: relative;
    width: min(500px, 90vw);
    height: min(500px, 90vw);
}

.ring-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

.ring-reflection {
    position: absolute;
    bottom: 10%;
    left: 50%;
    transform: translateX(-50%);
    width: 50%;
    height: 15%;
    background: radial-gradient(ellipse, rgba(20, 184, 166, 0.15) 0%, transparent 70%);
    filter: blur(30px);
}

/* ========================================
   Section Headers
   ======================================== */
.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-label {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    color: var(--text-teal);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    margin-bottom: var(--space-md);
}

.section-title {
    margin-bottom: var(--space-md);
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-muted);
    font-weight: 400;
}

/* ========================================
   Philosophy Section
   ======================================== */
.philosophy {
    position: relative;
}

.section-decoration {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 1px;
    height: 100px;
    background: linear-gradient(to bottom, transparent, var(--teal), transparent);
    opacity: 0.3;
}

.philosophy-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--space-2xl);
    align-items: center;
}

.philosophy-text {
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: var(--space-lg);
}

.philosophy-text-secondary {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

.metrics-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.metric-item {
    text-align: center;
    padding: var(--space-xl) var(--space-lg);
    background: rgba(21, 30, 50, 0.5);
    border: 1px solid rgba(20, 184, 166, 0.1);
    border-radius: var(--radius-lg);
    transition: all var(--duration-normal) var(--ease-smooth);
}

.metric-item:hover {
    transform: translateY(-4px);
    border-color: var(--teal);
    box-shadow: 0 8px 30px rgba(20, 184, 166, 0.15);
}

.metric-number {
    display: block;
    font-family: var(--font-sans);
    font-size: 40px;
    font-weight: 700;
    color: var(--teal);
    line-height: 1;
    margin-bottom: var(--space-sm);
}

.metric-tag {
    display: block;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.philosophy-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

.feature-pill {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: rgba(20, 184, 166, 0.08);
    border: 1px solid rgba(20, 184, 166, 0.15);
    border-radius: var(--radius-full);
    transition: all var(--duration-normal) var(--ease-smooth);
}

.feature-pill:hover {
    background: rgba(20, 184, 166, 0.15);
    border-color: rgba(20, 184, 166, 0.3);
    transform: translateY(-2px);
}

.pill-icon {
    font-size: 16px;
}

.pill-text {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}

/* Cycle Display - Carousel */
.cycle-carousel {
    position: relative;
    width: 100%;
    max-width: 360px;
    margin: 0 auto;
}

.carousel-container {
    position: relative;
    width: 100%;
    overflow: hidden;
    border-radius: var(--radius-xl);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    background: #000;
    border: 1px solid rgba(20, 184, 166, 0.1);
}

.carousel-track {
    display: flex;
    width: 100%;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform;
}

.carousel-slide {
    flex: 0 0 100%;
    width: 100%;
    max-width: 100%;
    overflow: hidden;
}

.carousel-slide img {
    width: 100%;
    height: auto;
    display: block;
}

.carousel-indicators {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.indicator {
    width: 50px;
    height: 12px;
    border-radius: var(--radius-full);
    background: rgba(20, 184, 166, 0.2);
    border: none;
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-smooth);
    padding: 0;
    position: relative;
    pointer-events: auto;
    z-index: 10;
    font-size: 0;
    color: transparent;
}

.indicator:hover {
    background: rgba(20, 184, 166, 0.4);
    transform: scale(1.1);
}

.indicator:active {
    transform: scale(0.95);
}

.indicator.active {
    width: 50px;
    background: var(--teal);
}

/* ========================================
   Features Section
   ======================================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.feature-card {
    position: relative;
    background: rgba(21, 30, 50, 0.5);
    border: 1px solid rgba(20, 184, 166, 0.08);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    transition: all var(--duration-normal) var(--ease-smooth);
    overflow: hidden;
}

.card-decoration {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-teal);
    opacity: 0;
    transition: opacity var(--duration-normal) var(--ease-smooth);
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: rgba(20, 184, 166, 0.2);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.feature-card:hover .card-decoration {
    opacity: 1;
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-lg);
    color: var(--teal);
    background: rgba(20, 184, 166, 0.1);
    border-radius: var(--radius-md);
}

.feature-card h3 {
    margin-bottom: var(--space-md);
    font-size: 24px;
}

.feature-card p {
    margin-bottom: var(--space-lg);
    line-height: 1.7;
}

.feature-list {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-sm);
}

.feature-list li {
    padding: var(--space-sm) 0;
    font-size: 13px;
    color: var(--text-muted);
    border-bottom: 1px solid rgba(20, 184, 166, 0.05);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.feature-list li::before {
    content: '';
    width: 4px;
    height: 4px;
    background: var(--teal);
    border-radius: 50%;
}

/* ========================================
   Screenshots Section
   ======================================== */
.screenshots-carousel {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.screenshots-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.carousel-nav {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--navy);
    border: 1px solid var(--border);
    border-radius: 50%;
    color: var(--teal);
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-smooth);
    z-index: 10;
}

.carousel-nav:hover {
    background: rgba(20, 184, 166, 0.1);
    border-color: var(--teal);
    transform: scale(1.1);
}

.carousel-nav:active {
    transform: scale(0.95);
}

.carousel-nav svg {
    width: 20px;
    height: 20px;
}

.screenshots-carousel .carousel-container {
    flex: 1;
    overflow: hidden;
}

.screenshots-track {
    display: flex;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.screenshots-carousel .carousel-slide {
    flex: 0 0 calc(33.333% - var(--space-md));
    padding: var(--space-2xl) var(--space-sm);
    display: flex;
    justify-content: center;
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    align-items: start;
    padding: var(--space-2xl) 0;
    max-width: 1200px;
    margin: 0 auto;
}

.screenshot-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    width: 100%;
    max-width: 280px;
    margin: 0 auto;
}

.phone-frame {
    position: relative;
    width: 100%;
    height: 650px;
    background: linear-gradient(145deg, #151e32 0%, #0a0f1e 100%);
    border-radius: var(--radius-xl);
    padding: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(20, 184, 166, 0.15);
    transition: all var(--duration-normal) var(--ease-smooth);
    overflow: hidden;
}

.phone-frame-content {
    width: 100%;
    height: 100%;
    overflow-y: auto;
    overflow-x: hidden;
    border-radius: calc(var(--radius-xl) - 8px);
    scrollbar-width: thin;
    scrollbar-color: rgba(20, 184, 166, 0.3) transparent;
}

.phone-frame-content::-webkit-scrollbar {
    width: 4px;
}

.phone-frame-content::-webkit-scrollbar-track {
    background: transparent;
}

.phone-frame-content::-webkit-scrollbar-thumb {
    background: rgba(20, 184, 166, 0.3);
    border-radius: var(--radius-full);
}

.phone-frame-content::-webkit-scrollbar-thumb:hover {
    background: rgba(20, 184, 166, 0.5);
}

.phone-frame-content img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.phone-notch {
    position: absolute;
    top: 14px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 24px;
    background: #000;
    border-radius: 12px;
    z-index: 10;
}

.phone-frame:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(20, 184, 166, 0.3);
}

.phone-frame img {
    width: 100%;
    height: auto;
    display: block;
}

.screenshot-label {
    font-family: var(--font-sans);
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    padding: var(--space-sm) var(--space-lg);
    background: rgba(20, 184, 166, 0.08);
    border-radius: var(--radius-full);
    border: 1px solid rgba(20, 184, 166, 0.15);
    transition: all var(--duration-normal) var(--ease-smooth);
}

.screenshot-label:hover {
    background: rgba(20, 184, 166, 0.15);
    border-color: rgba(20, 184, 166, 0.3);
}

/* ========================================
   About Section
   ======================================== */
.about-content {
    max-width: 720px;
    margin: 0 auto;
}

.about-text {
    margin-bottom: 2rem;
    font-size: 1.125rem;
    line-height: 1.9;
    text-align: left;
}

.about-text:first-child {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--teal-light);
}

.about-text:last-child {
    margin-bottom: 0;
}

/* ========================================
   Info Section - Data & Privacy
   ======================================== */
.info-section {
    background: rgba(21, 30, 50, 0.3);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.info-card {
    background: rgba(21, 30, 50, 0.6);
    border: 1px solid rgba(20, 184, 166, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    transition: all var(--duration-normal) var(--ease-smooth);
}

.info-card:hover {
    transform: translateY(-4px);
    border-color: rgba(20, 184, 166, 0.2);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.info-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-lg);
    color: var(--teal);
    background: rgba(20, 184, 166, 0.1);
    border-radius: var(--radius-md);
}

.info-card h3 {
    margin-bottom: var(--space-md);
    font-size: 20px;
}

.info-card p {
    margin-bottom: var(--space-md);
    line-height: 1.7;
}

.info-note {
    font-size: 13px;
    color: var(--text-muted);
    font-style: italic;
}

/* ========================================
   Specs Section
   ======================================== */
.specs {
    padding: var(--space-xl) 0;
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.spec-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--space-xl) var(--space-lg);
    background: rgba(21, 30, 50, 0.5);
    border: 1px solid rgba(20, 184, 166, 0.1);
    border-radius: var(--radius-lg);
    transition: all var(--duration-normal) var(--ease-smooth);
}

.spec-item:hover {
    transform: translateY(-4px);
    border-color: var(--teal);
    box-shadow: 0 8px 30px rgba(20, 184, 166, 0.15);
}

.spec-label {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: var(--space-sm);
}

.spec-value {
    font-family: var(--font-sans);
    font-size: 20px;
    font-weight: 600;
    color: var(--text-teal);
}

/* ========================================
   CTA Section
   ======================================== */
.cta {
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-decoration {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: min(800px, 80vw);
    height: min(800px, 80vw);
    background: radial-gradient(circle, rgba(20, 184, 166, 0.08) 0%, transparent 70%);
    filter: blur(80px);
    animation: ctaGlow 8s ease-in-out infinite;
}

@keyframes ctaGlow {
    0%, 100% { opacity: 0.5; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 0.8; transform: translate(-50%, -50%) scale(1.1); }
}

.cta-title {
    margin-bottom: var(--space-lg);
    position: relative;
    z-index: 2;
}

.cta-subtitle {
    font-size: 18px;
    color: var(--text-muted);
    margin-bottom: var(--space-2xl);
    position: relative;
    z-index: 2;
}

/* Reservation Form */
.reservation-form {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.form-group {
    display: flex;
    gap: var(--space-md);
    align-items: center;
}

.email-input {
    flex: 1;
    padding: var(--space-md) var(--space-lg);
    background: rgba(21, 30, 50, 0.8);
    border: 1px solid rgba(20, 184, 166, 0.2);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 16px;
    outline: none;
    transition: all var(--duration-normal) var(--ease-smooth);
}

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

.email-input:focus {
    border-color: var(--teal);
    box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.1);
}

.email-input:valid {
    border-color: rgba(20, 184, 166, 0.3);
}

.form-message {
    margin-top: var(--space-lg);
    font-size: 15px;
    text-align: center;
    min-height: 24px;
    opacity: 0;
    transition: opacity var(--duration-normal) var(--ease-smooth);
}

.form-message.show {
    opacity: 1;
}

.form-message.success {
    color: var(--teal);
}

.form-message.error {
    color: #ef4444;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    border-top: 1px solid rgba(20, 184, 166, 0.1);
    padding: var(--space-2xl) 0 var(--space-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-xl);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.footer-logo {
    font-family: var(--font-sans);
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
}

.footer-tagline {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: var(--space-md);
}

.footer-description {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.6;
    max-width: 300px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.link-column h4 {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    margin-bottom: var(--space-lg);
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

.link-column a {
    display: block;
    font-size: 14px;
    color: var(--text-muted);
    text-decoration: none;
    margin-bottom: var(--space-md);
    transition: color var(--duration-fast) var(--ease-smooth);
}

.link-column a:hover {
    color: var(--text-teal);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(20, 184, 166, 0.05);
}

.footer-bottom p {
    font-size: 13px;
    color: var(--text-muted);
}

.footer-contact {
    margin-top: var(--space-sm);
    color: var(--text-teal);
    font-family: var(--font-mono);
    font-size: 12px;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .hero {
        padding-top: 160px;
    }

    .hero > .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        max-width: 100%;
    }

    .hero-actions {
        justify-content: center;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .philosophy-grid {
        grid-template-columns: 1fr;
    }

    .screenshots-grid {
        grid-template-columns: repeat(2, 1fr);
        max-width: 100%;
    }

    .screenshots-carousel {
        max-width: 100%;
    }

    .screenshots-carousel .carousel-slide {
        flex: 0 0 calc(50% - var(--space-sm));
    }

    .info-grid {
        grid-template-columns: 1fr;
    }

    .specs-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .nav-links {
        display: none;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 64px;
    }

    .hero-visual {
        min-height: 400px;
    }

    .ring-showcase {
        width: min(400px, 90vw);
        height: min(400px, 90vw);
    }

    .metrics-row {
        grid-template-columns: 1fr;
    }

    .cycle-display {
        max-width: 380px;
    }

    .form-group {
        flex-direction: column;
        align-items: stretch;
    }

    .screenshots-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
        padding: var(--space-xl) 0;
        max-width: 100%;
    }

    .screenshots-carousel .carousel-slide {
        flex: 0 0 100%;
    }

    .carousel-nav {
        width: 40px;
        height: 40px;
    }

    .carousel-nav svg {
        width: 18px;
        height: 18px;
    }

    .screenshot-item {
        max-width: 320px;
    }

    .phone-frame {
        height: 520px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ========================================
   Staggered Animations
   ======================================== */
.feature-card,
.screenshot-item,
.metric-item,
.spec-item,
.info-card {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s var(--ease-smooth), transform 0.8s var(--ease-smooth);
}

.feature-card.visible,
.screenshot-item.visible,
.metric-item.visible,
.spec-item.visible,
.info-card.visible {
    opacity: 1;
    transform: translateY(0);
}