/* CSS Variables */
:root {
    --primary: #4F46E5;
    --primary-dark: #4338CA;
    --secondary: #6366F1;
    --accent: #8B5CF6;
    --background: #F8FAFC;
    --surface: #FFFFFF;
    --text: #1E293B;
    --text-secondary: #64748B;
    --text-muted: #94A3B8;
    --border: #E2E8F0;
    --gradient: linear-gradient(135deg, #4F46E5 0%, #8B5CF6 100%);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
    :root {
        --background: #0F172A;
        --surface: #1E293B;
        --text: #F1F5F9;
        --text-secondary: #94A3B8;
        --text-muted: #64748B;
        --border: #334155;
    }
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--background);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
}

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

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 3rem;
}

.gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
}

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

.btn-large {
    padding: 16px 32px;
    font-size: 1.125rem;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(248, 250, 252, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

@media (prefers-color-scheme: dark) {
    .nav {
        background: rgba(15, 23, 42, 0.8);
    }
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text);
    text-decoration: none;
}

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

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

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
    gap: 64px;
    max-width: 1400px;
    margin: 0 auto;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.hero-badges {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-2xl);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.phone-mockup {
    width: 280px;
    height: 580px;
    background: #1a1a1a;
    border-radius: 48px;
    padding: 12px;
    box-shadow: var(--shadow-xl);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--surface);
    border-radius: 38px;
    overflow: hidden;
}

.app-preview {
    padding: 48px 16px 16px;
}

.preview-header {
    margin-bottom: 24px;
}

.preview-title {
    font-size: 1.5rem;
    font-weight: 700;
}

.preview-note {
    display: flex;
    gap: 12px;
    padding: 12px;
    background: var(--background);
    border-radius: var(--radius-lg);
    margin-bottom: 12px;
}

.note-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
}

.note-icon.idea {
    background: #FEF3C7;
}

.note-icon.journal {
    background: #EDE9FE;
}

.note-icon.project {
    background: #FCE7F3;
}

.note-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.note-title {
    font-weight: 600;
    font-size: 0.875rem;
}

.note-excerpt {
    font-size: 0.75rem;
    color: var(--text-muted);
}

@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        text-align: center;
    }

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

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

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

/* Features Section */
.features {
    padding: 120px 24px;
    background: var(--surface);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

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

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

.feature-card {
    padding: 32px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

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

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient);
    color: white;
    border-radius: var(--radius-lg);
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 8px;
}

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

.glass-effect {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
}

@media (prefers-color-scheme: dark) {
    .glass-effect {
        background: rgba(30, 41, 59, 0.7);
    }
}

/* Screenshots Section */
.screenshots {
    padding: 120px 24px;
}

.screenshot-carousel {
    overflow: hidden;
    margin-top: 48px;
}

.screenshot-track {
    display: flex;
    gap: 32px;
    justify-content: center;
    flex-wrap: wrap;
}

.screenshot-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.device-frame {
    background: #1a1a1a;
    border-radius: 32px;
    padding: 8px;
    box-shadow: var(--shadow-lg);
}

.device-frame.iphone {
    width: 200px;
    height: 420px;
}

.device-frame .screen {
    width: 100%;
    height: 100%;
    border-radius: 26px;
}

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

/* Pricing Section */
.pricing {
    padding: 120px 24px;
    background: var(--surface);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 900px;
    margin: 0 auto;
}

@media (max-width: 768px) {
    .pricing-grid {
        grid-template-columns: 1fr;
    }
}

.pricing-card {
    padding: 40px;
    background: var(--background);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    text-align: center;
    position: relative;
}

.pricing-card.featured {
    background: var(--surface);
    border: 2px solid var(--primary);
    box-shadow: var(--shadow-xl);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient);
    color: white;
    padding: 6px 16px;
    border-radius: var(--radius-2xl);
    font-size: 0.75rem;
    font-weight: 600;
}

.pricing-header {
    margin-bottom: 32px;
}

.pricing-header h3 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.price {
    font-size: 3rem;
    font-weight: 700;
}

.price-period {
    color: var(--text-secondary);
}

.pricing-features {
    list-style: none;
    text-align: left;
    margin-bottom: 32px;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    color: var(--text-secondary);
}

.pricing-features li svg {
    color: var(--primary);
    flex-shrink: 0;
}

.pricing-note {
    margin-top: 16px;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.pricing-card .btn {
    width: 100%;
}

/* FAQ Section */
.faq {
    padding: 120px 24px;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--border);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0;
    background: none;
    border: none;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    text-align: left;
}

.faq-question svg {
    transition: transform 0.3s;
    color: var(--text-muted);
}

.faq-item.active .faq-question svg {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding-bottom: 24px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Download Section */
.download {
    padding: 120px 24px;
    background: var(--surface);
    text-align: center;
}

.app-store-badge {
    display: inline-block;
    margin: 32px 0;
}

.app-store-badge img {
    height: 60px;
    width: auto;
}

.download-platforms {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    color: var(--text-secondary);
}

.platforms {
    display: flex;
    gap: 16px;
}

.platforms span {
    padding: 8px 16px;
    background: var(--background);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
}

/* Footer */
.footer {
    padding: 80px 24px 40px;
    background: var(--background);
    border-top: 1px solid var(--border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

.footer-brand p {
    margin-top: 16px;
    color: var(--text-secondary);
}

.footer-links h4 {
    font-size: 0.875rem;
    margin-bottom: 16px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-links a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 8px 0;
    transition: color 0.2s;
}

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

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Animations */
@keyframes fade-in {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.animate-fade-in {
    animation: fade-in 0.8s ease forwards;
}

.animate-fade-in-delay {
    animation: fade-in 0.8s ease 0.2s forwards;
    opacity: 0;
}

.animate-fade-in-delay-2 {
    animation: fade-in 0.8s ease 0.4s forwards;
    opacity: 0;
}

.animate-fade-in-delay-3 {
    animation: fade-in 0.8s ease 0.6s forwards;
    opacity: 0;
}

.animate-float {
    animation: float 4s ease-in-out infinite;
}

/* Intersection Observer Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

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

/* Page Styles */
.page-header {
    padding: 120px 24px 60px;
    text-align: center;
    background: var(--surface);
}

.page-content {
    padding: 60px 24px;
    max-width: 800px;
    margin: 0 auto;
}

.page-content h2 {
    margin-top: 48px;
    margin-bottom: 16px;
}

.page-content p {
    margin-bottom: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.page-content ul {
    margin-left: 24px;
    margin-bottom: 16px;
    color: var(--text-secondary);
}

.page-content li {
    margin-bottom: 8px;
}

/* Contact Form */
.contact-form {
    background: var(--surface);
    padding: 40px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--background);
    color: var(--text);
    font-size: 1rem;
    font-family: inherit;
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Press Kit */
.press-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 24px;
    margin: 32px 0;
}

.press-item {
    padding: 24px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    text-align: center;
}

.press-item img {
    max-width: 100%;
    height: auto;
    margin-bottom: 16px;
}

.press-item .btn {
    margin-top: 16px;
}