/* ============================================
   CardioCapture Landing Page Styles
   Design: Clean, modern fitness app aesthetic
   Colors: Soft grays, whites, coral/terracotta accent
   ============================================ */

/* CSS Variables */
:root {
    /* Colors */
    --bg-primary: #f5f5f5;
    --bg-secondary: #ffffff;
    --bg-dark: #2d2d2d;
    --bg-darker: #1a1a1a;

    --text-primary: #1a1a1a;
    --text-secondary: #6b6b6b;
    --text-muted: #9a9a9a;
    --text-inverse: #ffffff;

    --accent: #d4614c;
    --accent-light: #e8806d;
    --accent-dark: #b84d3a;
    --accent-bg: rgba(212, 97, 76, 0.1);

    --border-light: rgba(0, 0, 0, 0.06);
    --border-medium: rgba(0, 0, 0, 0.1);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);

    /* Typography */
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

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

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input {
    font-family: inherit;
    border: none;
    outline: none;
}

ul, ol {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

/* ============================================
   Navigation
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-md) 0;
    background: rgba(245, 245, 245, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    font-size: 1.125rem;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: var(--accent);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.logo-icon svg {
    width: 18px;
    height: 18px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-2xl);
}

.nav-links a {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

.nav-cta {
    padding: var(--space-sm) var(--space-lg);
    background: var(--bg-dark);
    color: var(--text-inverse);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-base);
}

.nav-cta:hover {
    background: var(--accent);
    transform: translateY(-1px);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(80px + var(--space-4xl)) 0 var(--space-4xl);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-gradient {
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(ellipse at center, rgba(212, 97, 76, 0.08) 0%, transparent 60%);
}

.hero-shapes {
    position: absolute;
    inset: 0;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.5;
}

.shape-1 {
    top: 15%;
    right: 10%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(212, 97, 76, 0.1) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
}

.shape-2 {
    bottom: 20%;
    left: 5%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(212, 97, 76, 0.06) 0%, transparent 70%);
    animation: float 25s ease-in-out infinite reverse;
}

.shape-3 {
    top: 40%;
    left: 30%;
    width: 150px;
    height: 150px;
    background: radial-gradient(circle, rgba(0, 0, 0, 0.03) 0%, transparent 70%);
    animation: float 15s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(20px, -20px); }
    50% { transform: translate(-10px, 20px); }
    75% { transform: translate(-20px, -10px); }
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.hero-content {
    max-width: 560px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--space-xl);
    animation: fadeInUp 0.6s ease-out;
}

.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: 0.6; transform: scale(1.2); }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 3.75rem);
    font-weight: 500;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-xl);
}

.title-line {
    display: block;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease-out forwards;
}

.title-line:nth-child(1) { animation-delay: 0.1s; }
.title-line:nth-child(2) { animation-delay: 0.2s; }
.title-line:nth-child(3) { animation-delay: 0.3s; }

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

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

.hero-subtitle {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: var(--space-lg);
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.4s forwards;
}

.subtitle-flow {
    color: var(--text-primary);
}

.subtitle-arrow {
    display: flex;
    align-items: center;
    color: var(--accent);
}

.subtitle-arrow svg {
    width: 24px;
    height: 24px;
}

.hero-description {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-2xl);
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.5s forwards;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.6s forwards;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-full);
    font-size: 0.9375rem;
    font-weight: 500;
    transition: all var(--transition-base);
}

.btn svg {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-base);
}

.btn-primary {
    background: var(--accent);
    color: white;
    box-shadow: 0 4px 20px rgba(212, 97, 76, 0.3);
}

.btn-primary:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(212, 97, 76, 0.4);
}

.btn-primary:hover svg {
    transform: translateX(4px);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    height: 500px;
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.4s forwards;
}

.hero-card {
    position: absolute;
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.hero-card-main {
    top: 10%;
    left: 0;
    width: 320px;
    padding: var(--space-xl);
    animation: floatCard 6s ease-in-out infinite;
}

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

.card-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.card-icon {
    width: 32px;
    height: 32px;
    background: var(--accent-bg);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
}

.card-icon svg {
    width: 16px;
    height: 16px;
}

.card-metrics {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

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

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

.metric-value {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.metric-value small {
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--text-secondary);
}

.card-graph {
    height: 60px;
    margin: 0 calc(-1 * var(--space-xl));
    margin-bottom: calc(-1 * var(--space-xl));
    padding: 0 var(--space-xl);
    background: linear-gradient(to top, rgba(212, 97, 76, 0.05), transparent);
}

.card-graph svg {
    width: 100%;
    height: 100%;
}

.hero-card-secondary {
    top: 5%;
    right: 10%;
    width: 140px;
    padding: var(--space-lg);
    text-align: center;
    animation: floatCard 5s ease-in-out infinite reverse;
    animation-delay: -1s;
}

.card-icon-large {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #ff6b6b, var(--accent));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin: 0 auto var(--space-md);
}

.card-icon-large svg {
    width: 24px;
    height: 24px;
}

.card-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: block;
    margin-bottom: 4px;
}

.card-value {
    font-size: 1.75rem;
    font-weight: 600;
}

.card-value small {
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--text-secondary);
}

.hero-card-tertiary {
    bottom: 15%;
    right: 0;
    width: 200px;
    padding: var(--space-lg);
    animation: floatCard 7s ease-in-out infinite;
    animation-delay: -2s;
}

.export-icons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-md);
}

.export-icon {
    padding: var(--space-xs) var(--space-sm);
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.card-status {
    font-size: 0.8125rem;
    font-weight: 500;
    color: #22c55e;
}

/* ============================================
   Section Styles (Common)
   ============================================ */
section {
    padding: var(--space-4xl) 0;
}

.section-label {
    display: inline-block;
    padding: var(--space-sm) var(--space-md);
    background: var(--accent-bg);
    color: var(--accent);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-lg);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 500;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-xl);
}

/* ============================================
   Testimonials Section
   ============================================ */
.testimonials {
    padding: var(--space-3xl) 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-light);
}

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

.testimonial-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    transition: all var(--transition-base);
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.testimonial-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent);
}

.testimonial-card p {
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 0;
}

@media (max-width: 1024px) {
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   Problem Section
   ============================================ */
.problem {
    background: var(--bg-secondary);
}

.problem-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-3xl);
}

.problem-content {
    max-width: 900px;
    margin: 0 auto;
}

.problem-scenarios {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

.scenario-card {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease-out forwards;
    animation-delay: calc(var(--delay) * 0.1s);
    transition: all var(--transition-base);
    cursor: default;
}

.scenario-card:hover {
    background: rgba(34, 197, 94, 0.1);
    box-shadow: 0 0 0 2px rgba(34, 197, 94, 0.3);
}

.scenario-card:hover .scenario-icon {
    background: rgba(34, 197, 94, 0.2);
    color: #16a34a;
}

.scenario-card:hover strong {
    color: #16a34a;
}

.scenario-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.scenario-icon svg {
    width: 24px;
    height: 24px;
}

.scenario-card p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.scenario-card strong {
    color: var(--text-primary);
    font-weight: 600;
}

.problem-result {
    margin-bottom: var(--space-2xl);
}

.result-card {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-xl);
    background: var(--bg-darker);
    border-radius: var(--radius-xl);
    color: var(--text-inverse);
    transition: all var(--transition-base);
    cursor: default;
}

.result-card:hover {
    background: #991b1b;
    box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.4);
}

.result-card:hover .result-icon {
    background: rgba(239, 68, 68, 0.3);
}

.result-card:hover .result-icon svg {
    color: #fca5a5;
}

.result-card:hover .result-content strong {
    color: #fca5a5;
}

.result-icon {
    width: 64px;
    height: 64px;
    min-width: 64px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.result-icon svg {
    width: 32px;
    height: 32px;
    color: var(--accent-light);
}

.result-content h3 {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.result-content p {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.7);
}

.result-content strong {
    color: var(--accent-light);
}

.problem-explanation {
    padding: var(--space-xl);
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    border-left: 4px solid var(--accent);
}

.problem-explanation > p {
    font-size: 1.0625rem;
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
}

.problem-explanation strong {
    color: var(--accent-dark);
}

.problem-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.problem-list li {
    position: relative;
    padding-left: var(--space-xl);
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.problem-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.5em;
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    opacity: 0.5;
}

/* ============================================
   Solution Section
   ============================================ */
.solution {
    background: var(--bg-primary);
}

.solution-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-3xl);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.feature-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    opacity: 0;
    transform: translateY(30px);
}

.feature-card.animate {
    animation: fadeInUp 0.6s ease-out forwards;
    animation-delay: calc(var(--delay) * 0.15s);
}

.feature-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.feature-large {
    grid-column: span 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

.feature-equipment {
    grid-column: span 2;
}

.feature-number {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: var(--space-md);
    letter-spacing: 0.05em;
}

.feature-content h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: var(--space-md);
    line-height: 1.3;
}

.feature-content p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-md);
}

.feature-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.tag {
    padding: var(--space-xs) var(--space-md);
    background: var(--bg-primary);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.feature-note {
    font-weight: 500;
    color: var(--accent) !important;
}

/* Feature Visual - Phone Mockup */
.feature-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    width: 260px;
    height: 520px;
    background: #1a1a1a;
    border-radius: 44px;
    padding: 10px;
    box-shadow: var(--shadow-xl), inset 0 0 0 2px rgba(255, 255, 255, 0.1);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: #f8f8f8;
    border-radius: 34px;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.phone-notch {
    width: 100px;
    height: 28px;
    background: #1a1a1a;
    border-radius: 0 0 20px 20px;
    margin: 0 auto;
    position: relative;
}

.phone-notch::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    background: #2d2d2d;
    border-radius: 50%;
    top: 8px;
    right: 20px;
}

.phone-ui {
    flex: 1;
    padding: 20px 16px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.phone-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.phone-header i {
    width: 36px;
    height: 36px;
    background: var(--accent);
    color: white;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.phone-header span {
    font-size: 0.9375rem;
    font-weight: 600;
    color: #1a1a1a;
}

.phone-section {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.phone-section-label {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #6b6b6b;
}

.phone-data-grid {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.phone-data-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 14px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.phone-data-item .data-label {
    font-size: 0.8125rem;
    color: #6b6b6b;
}

.phone-data-item .data-value {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--accent);
}

.phone-actions {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.phone-btn {
    width: 100%;
    padding: 14px;
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.phone-btn-primary {
    background: var(--accent);
    color: white;
}

.phone-btn-primary:hover {
    background: var(--accent-dark);
}

.phone-btn-secondary {
    background: white;
    color: #1a1a1a;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.phone-btn-secondary:hover {
    background: #f0f0f0;
}

/* Feature Visual - Merge */
.feature-visual-small {
    margin-top: var(--space-xl);
}

.merge-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.merge-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    min-width: 80px;
}

.merge-item svg {
    width: 24px;
    height: 24px;
    color: var(--text-secondary);
}

.merge-item span {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.merge-result {
    background: var(--accent-bg);
}

.merge-result svg {
    color: var(--accent);
}

.merge-plus, .merge-equals {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--text-muted);
}

/* Equipment Grid */
.equipment-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.equipment-item {
    padding: var(--space-lg);
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-base);
}

.equipment-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-md);
    transition: all var(--transition-base);
}

.equipment-icon svg {
    width: 28px;
    height: 28px;
}

.equipment-icon i {
    font-size: 1.5rem;
}

/* Treadmill - Orange */
[data-equipment="treadmill"] .equipment-icon {
    background: rgba(212, 97, 76, 0.15);
    color: #d4614c;
}

[data-equipment="treadmill"]:hover {
    background: rgba(212, 97, 76, 0.08);
}

[data-equipment="treadmill"]:hover .equipment-icon {
    background: #d4614c;
    color: white;
}

/* Bike - Green */
[data-equipment="bike"] .equipment-icon {
    background: rgba(34, 197, 94, 0.15);
    color: #22c55e;
}

[data-equipment="bike"]:hover {
    background: rgba(34, 197, 94, 0.08);
}

[data-equipment="bike"]:hover .equipment-icon {
    background: #22c55e;
    color: white;
}

/* StairMaster - Purple */
[data-equipment="stairmaster"] .equipment-icon {
    background: rgba(168, 85, 247, 0.15);
    color: #a855f7;
}

[data-equipment="stairmaster"]:hover {
    background: rgba(168, 85, 247, 0.08);
}

[data-equipment="stairmaster"]:hover .equipment-icon {
    background: #a855f7;
    color: white;
}

/* Elliptical - Blue */
[data-equipment="elliptical"] .equipment-icon {
    background: rgba(59, 130, 246, 0.15);
    color: #3b82f6;
}

[data-equipment="elliptical"]:hover {
    background: rgba(59, 130, 246, 0.08);
}

[data-equipment="elliptical"]:hover .equipment-icon {
    background: #3b82f6;
    color: white;
}

.equipment-item h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.equipment-item p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Feature Visual - Intervals */
.intervals-visual {
    display: flex;
    gap: var(--space-xs);
    padding: var(--space-lg);
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
}

.interval {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

.interval-label {
    font-size: 0.6875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.interval-bar {
    width: 100%;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--text-muted);
    opacity: 0.3;
}

.interval.warmup .interval-bar { height: 20px; background: #60a5fa; opacity: 0.6; }
.interval.tempo .interval-bar { height: 50px; background: var(--accent); opacity: 0.8; }
.interval.recovery .interval-bar { height: 25px; background: #34d399; opacity: 0.6; }
.interval.cooldown .interval-bar { height: 15px; background: #60a5fa; opacity: 0.5; }

/* ============================================
   How It Works Section
   ============================================ */
.how-it-works {
    background: var(--bg-dark);
    color: var(--text-inverse);
}

.how-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-3xl);
}

.how-header .section-label {
    background: rgba(212, 97, 76, 0.2);
}

.how-header .section-title {
    color: white;
}

.steps-container {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 0;
    max-width: 1000px;
    margin: 0 auto;
}

.step {
    flex: 1;
    max-width: 220px;
    text-align: center;
    padding: var(--space-xl);
    opacity: 0;
    transform: translateY(20px);
}

.step.animate {
    animation: fadeInUp 0.6s ease-out forwards;
    animation-delay: calc(var(--delay) * 0.15s);
}

.step-number {
    width: 56px;
    height: 56px;
    background: var(--accent);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0 auto var(--space-lg);
}

.step-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.step-content p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.5;
}

.step-icons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-xs);
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.6);
}

.step-icons .dot {
    color: rgba(255, 255, 255, 0.3);
}

.optional {
    color: var(--accent-light);
    font-style: italic;
}

.step-connector {
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), rgba(212, 97, 76, 0.3));
    margin-top: calc(var(--space-xl) + 28px);
    flex-shrink: 0;
}

/* ============================================
   FAQ Section
   ============================================ */
.faq {
    background: var(--bg-secondary);
}

.faq-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-3xl);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.faq-item {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    padding: var(--space-lg) var(--space-xl);
    text-align: left;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.faq-question:hover {
    color: var(--accent);
}

.faq-icon {
    width: 24px;
    height: 24px;
    min-width: 24px;
    color: var(--text-muted);
    transition: transform var(--transition-base);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
    color: var(--accent);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-answer p {
    padding: 0 var(--space-xl) var(--space-xl);
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ============================================
   Final CTA Section
   ============================================ */
.final-cta {
    background: var(--bg-primary);
    padding: var(--space-4xl) 0;
}

.cta-card {
    position: relative;
    background: var(--bg-darker);
    border-radius: var(--radius-xl);
    padding: var(--space-4xl) var(--space-2xl);
    overflow: hidden;
    text-align: center;
}

.cta-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.cta-shape {
    position: absolute;
    border-radius: 50%;
}

.cta-shape-1 {
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(212, 97, 76, 0.2) 0%, transparent 60%);
}

.cta-shape-2 {
    bottom: -50px;
    left: -50px;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(212, 97, 76, 0.15) 0%, transparent 60%);
}

.cta-content {
    position: relative;
    z-index: 1;
    max-width: 500px;
    margin: 0 auto;
}

.cta-content h2 {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 500;
    color: white;
    margin-bottom: var(--space-md);
}

.cta-content > p {
    font-size: 1.0625rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-2xl);
}

.waitlist-form {
    max-width: 450px;
    margin: 0 auto;
}

.form-group {
    display: flex;
    gap: var(--space-sm);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    padding: var(--space-sm);
}

.form-group input {
    flex: 1;
    padding: var(--space-md) var(--space-lg);
    background: transparent;
    color: white;
    font-size: 0.9375rem;
}

.form-group input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.form-group .btn-primary {
    white-space: nowrap;
}

.form-note {
    margin-top: var(--space-md);
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.5);
}

.success-message {
    display: none;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-lg);
    background: rgba(34, 197, 94, 0.2);
    border-radius: var(--radius-lg);
    color: #22c55e;
    font-weight: 500;
}

.success-message svg {
    width: 24px;
    height: 24px;
}

.success-message.show {
    display: flex;
}

.waitlist-form.hidden {
    display: none;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--bg-secondary);
    padding: var(--space-2xl) 0;
    border-top: 1px solid var(--border-light);
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    font-size: 1rem;
}

.footer-logo .logo-icon {
    width: 28px;
    height: 28px;
}

.footer-logo .logo-icon svg {
    width: 16px;
    height: 16px;
}

.footer-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

.footer-copy {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ============================================
   Animations (Scroll-triggered via JS)
   ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   Responsive Styles
   ============================================ */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--space-3xl);
    }

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

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

    .hero-visual {
        height: 400px;
        max-width: 500px;
        margin: 0 auto;
    }

    .hero-card-main {
        left: 50%;
        transform: translateX(-50%);
    }

    .hero-card-secondary {
        top: 0;
        right: 5%;
    }

    .hero-card-tertiary {
        bottom: 10%;
        right: 5%;
    }

    .feature-large {
        grid-template-columns: 1fr;
    }

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

    .steps-container {
        flex-wrap: wrap;
        gap: var(--space-lg);
    }

    .step-connector {
        display: none;
    }

    .step {
        flex-basis: 45%;
    }
}

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

    .hero {
        padding-top: calc(70px + var(--space-3xl));
    }

    .hero-subtitle {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .hero-visual {
        height: 350px;
    }

    .hero-card-main {
        width: 280px;
        padding: var(--space-lg);
    }

    .hero-card-secondary,
    .hero-card-tertiary {
        display: none;
    }

    .problem-scenarios {
        grid-template-columns: 1fr;
    }

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

    .feature-large,
    .feature-equipment {
        grid-column: span 1;
    }

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

    .step {
        flex-basis: 100%;
        max-width: 100%;
    }

    .form-group {
        flex-direction: column;
        border-radius: var(--radius-lg);
        padding: var(--space-md);
    }

    .form-group input {
        text-align: center;
    }

    .footer-content {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
}

@media (max-width: 480px) {
    :root {
        --space-4xl: 4rem;
    }

    .container {
        padding: 0 var(--space-md);
    }

    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .result-card {
        flex-direction: column;
        text-align: center;
    }

    .merge-visual {
        flex-direction: column;
    }

    .intervals-visual {
        flex-direction: column;
    }

    .interval {
        flex-direction: row;
        gap: var(--space-md);
    }

    .interval-bar {
        flex: 1;
        height: 12px !important;
    }
}

/* ============================================
   Utility Classes
   ============================================ */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.highlight {
    color: var(--accent);
    font-weight: 600;
}