/* CSS Variables for theming */
:root {
    /* Energeia Brand Colors */
    --bg-primary: #000000;
    --bg-secondary: #181A1B;
    --bg-tertiary: #232526;
    --text-primary: #FFFFFF;
    --text-secondary: #E5E4E2;
    --text-muted: #A3C9C7;
    --border-color: #E5E4E2;
    --accent-primary: #32D74B;
    --accent-secondary: #A3C9C7;
    --accent-gradient: linear-gradient(135deg, #32D74B 0%, #A3C9C7 100%);
    --shadow-sm: 0 1px 2px 0 rgb(50 215 75 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(50 215 75 / 0.1), 0 2px 4px -2px rgb(50 215 75 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(50 215 75 / 0.1), 0 4px 6px -4px rgb(50 215 75 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(50 215 75 / 0.1), 0 8px 10px -6px rgb(50 215 75 / 0.1);
}

/* Dark theme colors */
[data-theme="dark"] {
    --bg-primary: #000000;
    --bg-secondary: #181A1B;
    --bg-tertiary: #232526;
    --text-primary: #FFFFFF;
    --text-secondary: #E5E4E2;
    --text-muted: #A3C9C7;
    --border-color: #E5E4E2;
    --accent-primary: #32D74B;
    --accent-secondary: #A3C9C7;
    --accent-gradient: linear-gradient(135deg, #32D74B 0%, #A3C9C7 100%);
    --shadow-sm: 0 1px 2px 0 rgb(50 215 75 / 0.15);
    --shadow-md: 0 4px 6px -1px rgb(50 215 75 / 0.2), 0 2px 4px -2px rgb(50 215 75 / 0.2);
    --shadow-lg: 0 10px 15px -3px rgb(50 215 75 / 0.2), 0 4px 6px -4px rgb(50 215 75 / 0.2);
    --shadow-xl: 0 20px 25px -5px rgb(50 215 75 / 0.2), 0 8px 10px -6px rgb(50 215 75 / 0.2);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Montserrat', 'Avenir Next', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Avenir Next', 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: 0.5rem;
}

p, a, li, span, label, input, button {
    font-family: 'Montserrat', 'Avenir Next', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--accent-secondary);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header & Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(0,0,0,0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

[data-theme="dark"] .header {
    background-color: rgba(15, 23, 42, 0.8);
}

.nav {
    padding: 1rem 0;
}

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

.nav-logo .logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(white);
    -webkit-text-fill-color: unset;
    font-family: 'Avenir Next', 'Montserrat', sans-serif;
}

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

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-link:hover {
    color: #fff;
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.5rem;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.theme-toggle:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.theme-toggle .moon-icon {
    display: none;
}

[data-theme="dark"] .theme-toggle .sun-icon {
    display: none;
}

[data-theme="dark"] .theme-toggle .moon-icon {
    display: block;
}

/* Hero Section */
.hero {
    padding: 8rem 0 4rem;
    background: linear-gradient(135deg, #000 60%, var(--accent-primary) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    color: white;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.1;
}

.gradient-text {
    background: linear-gradient(135deg, #ffffff 0%, #e2e8f0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-tagline {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.hero-description {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.8;
    line-height: 1.6;
}

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

/* Buttons */
.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.75rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

.cta-button.primary {
    background: var(--accent-primary);
    color: #000;
    box-shadow: var(--shadow-md);
}

.cta-button.primary:hover {
    background: var(--accent-primary);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.cta-button.secondary {
    background: transparent;
    color: var(--accent-primary);
    border: 2px solid var(--accent-primary);
}

.cta-button.secondary:hover {
    background: rgba(var(--accent-primary-rgb, 50,215,75), 0.1);
    color: #fff;
    border-color: var(--accent-primary);
}

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

/* Phone Mockup */
.phone-mockup {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-screen {
    width: 280px;
    height: 560px;
    background: var(--bg-primary);
    border-radius: 2rem;
    padding: 1rem;
    box-shadow: var(--shadow-xl);
    border: 8px solid #1a1a1a;
    position: relative;
}

.phone-screen::before {
    content: '';
    position: absolute;
    top: 0.5rem;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: #1a1a1a;
    border-radius: 2px;
}

.app-preview {
    height: 100%;
    background: var(--bg-secondary);
    border-radius: 1rem;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.app-title {
    font-weight: 600;
    color: var(--text-primary);
}

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

.app-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.metric-card {
    background: var(--bg-primary);
    padding: 1rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
}

.metric-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.metric-value {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.metric-progress {
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 2px;
    transition: width 0.3s ease;
}

/* Features Section */
.features {
    padding: 6rem 0;
    background: var(--bg-secondary);
}

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

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 1rem;
    color: var(--text-primary);
}

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

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

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

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

.feature-icon {
    width: 48px;
    height: 48px;
    background: var(--accent-primary);
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    color: #000;
}

.feature-title {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

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

/* Screenshots Section */
.screenshots {
    padding: 6rem 0;
    background: var(--bg-primary);
}

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

.screenshot-item {
    aspect-ratio: 9/16;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

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

.screenshot-placeholder {
    width: 100%;
    height: 100%;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
}

.placeholder-content {
    text-align: center;
    color: var(--text-muted);
}

.placeholder-icon {
    margin-bottom: 0.5rem;
    opacity: 0.5;
}

/* CTA Section */
.cta-section {
    padding: 6rem 0;
    background: #000;
    text-align: center;
    color: #fff;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 1rem;
}

.cta-description {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Footer */
.footer {
    background: var(--bg-primary);
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-brand .footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(white);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    margin-bottom: 0.5rem;
}

.footer-tagline {
    color: var(--text-secondary);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
}

.footer-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.footer-link {
    display: block;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    transition: color 0.2s ease;
}

.footer-link:hover {
    color: var(--accent-primary);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.social-link:hover {
    background: var(--accent-primary);
    color: #000;
    transform: translateY(-2px);
}

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

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

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

[data-aos="fade-up"] {
    animation: fadeInUp 0.6s ease forwards;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .hero {
        padding: 6rem 0 3rem;
    }
    
    .nav-menu {
        gap: 1rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .screenshots-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-button {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.75rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-button {
        width: 100%;
        max-width: 280px;
    }
    
    .phone-screen {
        width: 240px;
        height: 480px;
    }
    
    .features-grid {
        gap: 1.5rem;
    }
    
    .feature-card {
        padding: 1.5rem;
    }
}

/* Smooth scrolling for older browsers */
@media (prefers-reduced-motion: no-preference) {
    html {
        scroll-behavior: smooth;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-muted: #666666;
    }
    
    [data-theme="dark"] {
        --border-color: #ffffff;
        --text-muted: #cccccc;
    }
}

::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
}

/* Accent Color Picker Modal */
.accent-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.5rem;
    color: var(--text-secondary);
    transition: all 0.2s ease;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
}
.accent-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--accent-primary);
}

.accent-modal {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.accent-modal-content {
    background: #181A1B;
    border-radius: 1.25rem;
    padding: 2rem 2rem 1.5rem 2rem;
    box-shadow: 0 8px 32px rgba(0,0,0,0.25);
    min-width: 320px;
    max-width: 90vw;
    text-align: center;
    position: relative;
}

.accent-modal-title {
    color: #fff;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.accent-options {
    display: grid;
    grid-template-columns: repeat(3, 64px);
    gap: 1rem;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.accent-option {
    width: 64px;
    height: 64px;
    border-radius: 1rem;
    border: 3px solid transparent;
    outline: none;
    cursor: pointer;
    transition: border 0.2s, box-shadow 0.2s;
    box-shadow: 0 2px 8px rgba(0,0,0,0.12);
    font-size: 1rem;
}

.accent-option.selected, .accent-option:focus {
    border: 3px solid #fff;
    box-shadow: 0 0 0 2px var(--accent-primary);
}

.accent-modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    color: #fff;
    font-size: 2rem;
    cursor: pointer;
    border-radius: 0.5rem;
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}
.accent-modal-close:hover {
    background: var(--bg-tertiary);
}

@media (max-width: 480px) {
    .accent-modal-content {
        min-width: 90vw;
        padding: 1.25rem 0.5rem 1rem 0.5rem;
    }
    .accent-options {
        grid-template-columns: repeat(3, 48px);
        gap: 0.5rem;
    }
    .accent-option {
        width: 48px;
        height: 48px;
    }
}