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

:root {
    --primary-color: #000000;
    --secondary-color: #666666;
    --background-color: #ffffff;
    --accent-color: #000000;
    --error-color: #ff0000;
    --text-light: #999999;
    --border-color: #e5e5e5;
    --hover-color: #f5f5f5;
    
    --font-primary: 'Playfair Display', serif;
    --font-secondary: 'Montserrat', sans-serif;
    
    --border-radius: 8px;
    --padding-standard: 16px;
    --padding-small: 8px;
    --padding-large: 24px;
    
    --font-size-h1: 48px;
    --font-size-h2: 36px;
    --font-size-h3: 24px;
    --font-size-body: 16px;
    --font-size-small: 14px;
    --font-size-xs: 12px;
}

body {
    font-family: var(--font-secondary);
    line-height: 1.6;
    color: var(--primary-color);
    background-color: var(--background-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--padding-standard);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--padding-standard);
}

h1 {
    font-size: var(--font-size-h1);
}

h2 {
    font-size: var(--font-size-h2);
}

h3 {
    font-size: var(--font-size-h3);
}

p {
    margin-bottom: var(--padding-standard);
    font-size: var(--font-size-body);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-family: var(--font-secondary);
    font-weight: 500;
    font-size: var(--font-size-body);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--background-color);
    border-color: var(--primary-color);
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--padding-standard);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo h1 {
    font-family: var(--font-primary);
    font-size: var(--font-size-h3);
    margin: 0;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 500;
    font-size: var(--font-size-small);
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: var(--secondary-color);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #f0f2f5 0%, #f8f9fa 100%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 52px;
    margin-bottom: var(--padding-standard);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--secondary-color);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

/* Phone Mockup */
.phone-mockup {
    max-width: 300px;
    margin: 0 auto;
    position: relative;
}

.app-screenshot {
    width: 100%;
    height: auto;
    border-radius: 25px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    object-fit: cover;
}

/* Features Section */
.features {
    padding: 80px 0;
    background-color: var(--background-color);
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    margin-bottom: var(--padding-standard);
}

.section-header p {
    font-size: 18px;
    color: var(--secondary-color);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.feature-card {
    text-align: center;
    padding: var(--padding-large);
    border-radius: var(--border-radius);
    background-color: white;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--padding-standard);
}

.feature-card h3 {
    margin-bottom: var(--padding-standard);
    font-size: 20px;
}

.feature-card p {
    color: var(--secondary-color);
    margin: 0;
}

/* Screenshots Section */
.screenshots {
    padding: 80px 0;
    background-color: var(--hover-color);
}

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

.screenshot-mockup {
    background-color: white;
    border-radius: var(--border-radius);
    padding: var(--padding-large);
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mockup-content h4 {
    font-size: 18px;
    margin-bottom: var(--padding-small);
}

.mockup-content p {
    color: var(--secondary-color);
    margin: 0;
}

/* Download Section */
.download {
    padding: 80px 0;
    background-color: var(--primary-color);
    color: white;
    text-align: center;
}

.download h2 {
    color: white;
    margin-bottom: var(--padding-standard);
}

.download p {
    font-size: 18px;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.download-buttons {
    margin-bottom: var(--padding-large);
}

.app-store-btn img {
    height: 60px;
    transition: transform 0.3s ease;
}

.app-store-btn:hover img {
    transform: scale(1.05);
}

.download-info p {
    font-size: var(--font-size-small);
    opacity: 0.7;
    margin: 0;
}

/* Footer */
.footer {
    background-color: var(--hover-color);
    padding: 60px 0 30px;
}

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

.footer-section h3,
.footer-section h4 {
    margin-bottom: var(--padding-standard);
    font-size: 18px;
}

.footer-section h3 {
    font-family: var(--font-primary);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--padding-small);
}

.footer-section a {
    color: var(--secondary-color);
    text-decoration: none;
    font-size: var(--font-size-small);
    transition: color 0.3s ease;
}

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

.footer-logo p {
    color: var(--secondary-color);
    margin: 0;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    font-size: var(--font-size-small);
    color: var(--secondary-color);
    margin: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
        gap: 1rem;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-title {
        font-size: 36px;
    }

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

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

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

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-h1: 32px;
        --font-size-h2: 28px;
        --padding-standard: 12px;
    }

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

    .hero {
        padding: 100px 0 60px;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: var(--font-size-body);
    }

    .hero-buttons {
        flex-direction: column;
        gap: 0.5rem;
    }

    .phone-mockup {
        max-width: 250px;
    }

    .features,
    .screenshots,
    .download {
        padding: 60px 0;
    }

    .feature-card {
        padding: var(--padding-standard);
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

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

.feature-card,
.screenshot-item {
    animation: fadeInUp 0.6s ease-out;
}

/* iOS-like animations and interactions */
.btn,
.feature-card,
.app-store-btn {
    -webkit-tap-highlight-color: transparent;
}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Focus styles for keyboard navigation */
.btn:focus,
.nav-menu a:focus,
.footer-section a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}