:root {
    --primary-color: #007AFF;
    --primary-dark: #0056b3;
    --secondary-color: #5856D6;
    --success-color: #34C759;
    --danger-color: #FF3B30;
    --background: #FFFFFF;
    --surface: #F9FAFB;
    --text-primary: #1C1C1E;
    --text-secondary: #6B7280;
    --border-color: #E5E7EB;
    --shadow: rgba(0, 0, 0, 0.1);
    --gradient-1: linear-gradient(135deg, #007AFF 0%, #5856D6 100%);
    --gradient-2: linear-gradient(135deg, #34C759 0%, #007AFF 100%);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--text-primary);
    background-color: var(--background);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 1rem 0;
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-logo {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.nav-brand h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* Hero Section */
.hero {
    padding: 140px 0 100px;
    background: radial-gradient(ellipse at top, rgba(0, 122, 255, 0.05) 0%, transparent 60%);
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 6rem;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    background: rgba(0, 122, 255, 0.1);
    color: var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(0, 122, 255, 0.2);
}

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.7;
    max-width: 540px;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.stat {
    text-align: left;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

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

.phone-mockup {
    position: relative;
    z-index: 2;
    filter: drop-shadow(0 30px 60px rgba(0, 0, 0, 0.2));
}

.phone-screen {
    width: 320px;
    height: auto;
    border-radius: 40px;
    display: block;
}

.floating-card {
    position: absolute;
    background: white;
    border-radius: 16px;
    padding: 1.25rem 1.5rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    gap: 1rem;
    border: 1px solid var(--border-color);
    animation: float 3s ease-in-out infinite;
}

.card-1 {
    top: 15%;
    right: -10%;
    animation-delay: 0s;
}

.card-2 {
    bottom: 20%;
    left: -15%;
    animation-delay: 1.5s;
}

.card-icon {
    font-size: 2rem;
    line-height: 1;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.card-subtitle {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
    box-shadow: 0 4px 15px rgba(0, 122, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 122, 255, 0.4);
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
}

.btn-large {
    padding: 1.25rem 3rem;
    font-size: 1.125rem;
}

/* Demo Section */
.demo-section {
    padding: 80px 0;
    background: var(--surface);
}

.video-container {
    max-width: 800px;
    margin: 0 auto;
    aspect-ratio: 16/9;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 60px var(--shadow);
}

.video-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1C1C1E 0%, #3A3A3C 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
}

.play-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.9;
}

.video-placeholder p {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.video-placeholder small {
    opacity: 0.7;
}

/* Transformation Section */
.transformation {
    padding: 100px 0;
    background: var(--surface);
}

.transformation-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
}

.transform-side {
    padding: 2.5rem;
    border-radius: 20px;
    background: white;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.transform-side.before:hover {
    border-color: var(--danger-color);
    box-shadow: 0 10px 40px rgba(255, 59, 48, 0.1);
}

.transform-side.after:hover {
    border-color: var(--success-color);
    box-shadow: 0 10px 40px rgba(52, 199, 89, 0.1);
}

.transform-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    margin-bottom: 1.5rem;
}

.before .transform-label {
    background: rgba(255, 59, 48, 0.1);
    color: var(--danger-color);
}

.after .transform-label {
    background: rgba(52, 199, 89, 0.1);
    color: var(--success-color);
}

.transform-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.transform-items {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.transform-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 0;
}

.item-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 700;
    flex-shrink: 0;
}

.item-icon.bad {
    background: rgba(255, 59, 48, 0.1);
    color: var(--danger-color);
}

.item-icon.good {
    background: rgba(52, 199, 89, 0.1);
    color: var(--success-color);
}

.item-text {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.transform-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.transform-divider::before {
    content: '';
    position: absolute;
    width: 1px;
    height: 100%;
    background: linear-gradient(180deg, transparent 0%, var(--border-color) 20%, var(--border-color) 80%, transparent 100%);
}

.divider-icon {
    font-size: 3rem;
    background: white;
    border-radius: 50%;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--border-color);
    position: relative;
    z-index: 1;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

/* Sections */
section {
    padding: 80px 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* How It Works */
.how-it-works {
    background: var(--surface);
    padding: 80px 0;
}

.how-it-works-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: flex-start;
    margin-top: 2.5rem;
}

.how-it-works-video .video-container {
    position: sticky;
    top: 100px;
}

.how-it-works-steps {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.step-accordion {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.step-accordion:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 20px rgba(0, 122, 255, 0.1);
}

.step-accordion[open] {
    border-color: var(--primary-color);
}

.step-accordion-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem;
    cursor: pointer;
    list-style: none;
    user-select: none;
    transition: all 0.3s ease;
}

.step-accordion-header::-webkit-details-marker {
    display: none;
}

.step-accordion-header:hover {
    background: rgba(0, 122, 255, 0.02);
}

.step-number-badge {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--gradient-1);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-title {
    flex: 1;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.step-icon {
    font-size: 1.5rem;
    color: var(--text-secondary);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.step-accordion[open] .step-icon {
    transform: rotate(90deg);
}

.step-content {
    padding: 0 1.25rem 1.25rem 1.25rem;
    margin-left: 52px;
    animation: slideDown 0.3s ease;
}

.step-content p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 0.875rem;
    font-size: 0.9375rem;
}

.step-content p:last-child {
    margin-bottom: 0;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Use Cases */
.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
}

.use-case {
    text-align: center;
    padding: 1.5rem 1rem;
    background: white;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.use-case:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow);
    border-color: var(--primary-color);
}

.use-case h3 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

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

/* Screenshots */
.screenshots {
    background: var(--surface);
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.screenshot {
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 10px 40px var(--shadow);
    transition: transform 0.3s ease;
}

.screenshot:hover {
    transform: scale(1.05);
}

/* Download Section */
.download {
    text-align: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.download .section-title {
    color: white;
}

.download .section-subtitle {
    color: rgba(255, 255, 255, 0.9);
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 2rem 0;
}

.download-note {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
}

.apple-icon {
    margin-right: 0.5rem;
    font-size: 1.25rem;
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-brand h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.footer-column h4 {
    margin-bottom: 1rem;
    font-size: 1rem;
}

.footer-column a,
.footer-column p {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    transition: color 0.3s ease;
}

.footer-column a:hover {
    color: white;
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 990px) and (min-width: 769px) {
    .use-cases-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-title {
        font-size: 2.5rem;
    }

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

    .hero-mockups {
        height: 400px;
    }

    .mockup {
        width: 200px !important;
    }

    .nav-links {
        gap: 1rem;
        font-size: 0.875rem;
    }

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

    .use-cases-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .how-it-works-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .how-it-works-video .video-container {
        position: relative;
        top: 0;
    }

    .step-accordion-header {
        padding: 1.25rem;
        gap: 0.75rem;
    }

    .step-number-badge {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }

    .step-title {
        font-size: 1.125rem;
    }

    .step-content {
        margin-left: 0;
        padding: 0 1.25rem 1.25rem 1.25rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

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

    .transformation-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .transform-divider {
        display: none;
    }

    .transform-side {
        padding: 2rem;
    }

    .transform-title {
        font-size: 1.5rem;
    }

    .divider-icon {
        width: 60px;
        height: 60px;
        font-size: 2rem;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.6s ease-out;
}