/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #007AFF;
    --primary-dark: #0056CC;
    --secondary-color: #5856D6;
    --accent-color: #FF9500;
    --success-color: #34C759;
    --warning-color: #FF9F0A;
    --error-color: #FF3B30;
    
    --text-primary: #1D1D1F;
    --text-secondary: #86868B;
    --text-tertiary: #AEAEB2;
    
    --bg-primary: #FFFFFF;
    --bg-secondary: #F5F5F7;
    --bg-tertiary: #FAFAFA;
    --bg-card: #FFFFFF;
    
    --border-color: #D2D2D7;
    --border-light: #F2F2F7;
    
    --shadow-small: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-large: 0 8px 24px rgba(0, 0, 0, 0.12);
    
    --radius-small: 8px;
    --radius-medium: 12px;
    --radius-large: 16px;
    --radius-xl: 24px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--text-primary);
    text-decoration: none;
}

.logo-img {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-small);
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-link.download-btn {
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-small);
    font-weight: 600;
}

.nav-link.download-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 40%, rgba(0, 122, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(88, 86, 214, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

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

.badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-medium);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.badge svg {
    width: 16px;
    height: 16px;
    color: var(--primary-color);
}

.hero-image {
    position: relative;
}

.hero-screenshot {
    width: 100%;
    height: auto;
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-large);
    transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
    transition: var(--transition);
}

.hero-screenshot:hover {
    transform: perspective(1000px) rotateY(-2deg) rotateX(2deg);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-medium);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

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

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

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

.btn-secondary:hover {
    background: var(--bg-secondary);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-icon {
    width: 20px;
    height: 20px;
}

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

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

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

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Features Section */
.features {
    background: var(--bg-secondary);
}

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

.feature-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-small);
    transition: var(--transition);
}

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

.feature-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-medium);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.feature-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Screenshots Section */
.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.screenshot-item {
    text-align: center;
}

.screenshot-img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-medium);
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.screenshot-img:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-large);
}

.screenshot-caption h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

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

/* Privacy Section */
.privacy {
    background: var(--bg-secondary);
}

.privacy-content {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 4rem;
    align-items: center;
}

.privacy-features {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.privacy-feature {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.privacy-icon {
    width: 48px;
    height: 48px;
    background: var(--success-color);
    border-radius: var(--radius-medium);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.privacy-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.privacy-text-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.privacy-text-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.privacy-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.privacy-shield {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, var(--success-color), #30D158);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.privacy-shield::before {
    content: '';
    position: absolute;
    inset: 20px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.privacy-shield svg {
    width: 80px;
    height: 80px;
    color: white;
    position: relative;
    z-index: 1;
}

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

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

.download-requirements {
    margin-top: 2rem;
}

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

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-methods {
    margin-top: 2rem;
}

.contact-method {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-medium);
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-color);
    border-radius: var(--radius-medium);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.contact-method h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.contact-method p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.contact-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.contact-link:hover {
    text-decoration: underline;
}

/* Forms */
.form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-label {
    font-weight: 500;
    color: var(--text-primary);
}

.form-input {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-medium);
    font-family: inherit;
    transition: var(--transition);
    background: var(--bg-card);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 3rem 0 2rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    max-width: 300px;
}

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

.footer-link {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

.footer-link:hover {
    color: white;
}

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

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-badges {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .nav-menu {
        display: none;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .screenshots-grid {
        grid-template-columns: 1fr;
    }
    
    .privacy-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 2rem;
    }
    
    .footer-links {
        flex-wrap: wrap;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .container {
        padding: 0 16px;
    }
    
    section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .hero-buttons {
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
}

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

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

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

/* Focus styles */
.btn:focus,
.form-input:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Loading states */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-secondary: #000000;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .hero-screenshot {
        transform: none !important;
    }
}