/* ============================================
   NBTF Public Website Styles
   Matches app theme (dark mode, orange accent)
   ============================================ */

:root {
    /* Colors - matching app theme */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #1c2128;
    --bg-hover: #21262d;
    
    --border-primary: #30363d;
    --border-secondary: #21262d;
    
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    
    --accent-primary: #ff6b35;
    --accent-secondary: #ff8c5a;
    --accent-glow: rgba(255, 107, 53, 0.3);
    
    --success: #3fb950;
    --warning: #d29922;
    --danger: #f85149;
    --info: #58a6ff;
    
    /* Spacing */
    --container-width: 1200px;
    --nav-height: 70px;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ============================================
   Navigation
   ============================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(13, 17, 23, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-primary);
    z-index: 1000;
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.25rem;
}

.nav-logo img {
    width: 40px;
    height: 40px;
}

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
    padding: 0.5rem 0;
}

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

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background: var(--accent-secondary);
    box-shadow: 0 0 20px var(--accent-glow);
}

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

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

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* ============================================
   Container
   ============================================ */

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    min-height: 100vh;
    padding-top: var(--nav-height);
    display: flex;
    align-items: center;
    background: 
        radial-gradient(ellipse at top right, rgba(255, 107, 53, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at bottom left, rgba(255, 107, 53, 0.05) 0%, transparent 50%),
        var(--bg-primary);
}

.hero-content {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 4rem 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 500px;
}

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

/* App Preview */
.app-preview {
    display: flex;
    justify-content: center;
}

.app-window {
    width: 400px;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-primary);
    overflow: hidden;
    box-shadow: 
        0 25px 50px -12px rgba(0, 0, 0, 0.5),
        0 0 100px rgba(255, 107, 53, 0.1);
}

.window-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-primary);
}

.window-dots {
    display: flex;
    gap: 0.5rem;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green { background: #28c840; }

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

.window-content {
    padding: 1.5rem;
}

.chat-preview {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.chat-message {
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
    animation: messageSlide 0.5s ease-out;
}

.chat-user {
    font-weight: 600;
    margin-right: 0.5rem;
}

.chat-text {
    color: var(--text-primary);
}

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

/* ============================================
   Features Section
   ============================================ */

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

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

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

.feature-card {
    padding: 2rem;
    background: var(--bg-tertiary);
    border-radius: 12px;
    border: 1px solid var(--border-primary);
    transition: all 0.3s;
}

.feature-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.feature-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 107, 53, 0.1);
    border-radius: 12px;
    margin-bottom: 1.5rem;
    color: var(--accent-primary);
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

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

/* ============================================
   Stats Section
   ============================================ */

.stats {
    padding: 4rem 0;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-primary);
    border-bottom: 1px solid var(--border-primary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    text-align: center;
}

.stat-item {
    padding: 2rem;
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: 0.5rem;
}

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

/* ============================================
   CTA Section
   ============================================ */

.cta {
    padding: 6rem 0;
    background: 
        radial-gradient(ellipse at center, rgba(255, 107, 53, 0.15) 0%, transparent 70%),
        var(--bg-secondary);
    text-align: center;
}

.cta h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.cta p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* ============================================
   Footer
   ============================================ */

.footer {
    padding: 3rem 0;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-primary);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
}

.footer-brand img {
    width: 32px;
    height: 32px;
}

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

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

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

.footer-legal {
    display: flex;
    gap: 1.5rem;
    margin-top: 0.5rem;
}

.footer-legal a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color 0.2s;
}

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

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

/* ============================================
   About Page Styles
   ============================================ */

.page-header {
    padding: calc(var(--nav-height) + 4rem) 0 4rem;
    background: 
        radial-gradient(ellipse at top, rgba(255, 107, 53, 0.1) 0%, transparent 50%),
        var(--bg-primary);
    text-align: center;
}

.page-header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

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

.about-section {
    padding: 4rem 0;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-content h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--accent-primary);
}

.about-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-content ul {
    list-style: none;
    padding-left: 0;
}

.about-content li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    color: var(--text-secondary);
}

.about-content li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

/* ============================================
   Download Page Styles
   ============================================ */

.download-section {
    padding: 4rem 0;
}

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

.download-card {
    padding: 2.5rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-primary);
    text-align: center;
    transition: all 0.3s;
}

.download-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
}

.download-card .icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 107, 53, 0.1);
    border-radius: 16px;
    color: var(--accent-primary);
}

.download-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.download-card .version {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.download-card .requirements {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: 1rem;
}

/* ============================================
   Auth Pages (App-only Signup/Verify)
   ============================================ */

.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: 
        radial-gradient(ellipse at center, rgba(255, 107, 53, 0.1) 0%, transparent 50%),
        var(--bg-primary);
}

.auth-container {
    width: 100%;
    max-width: 440px;
}

.auth-card {
    background: var(--bg-secondary);
    border-radius: 16px;
    border: 1px solid var(--border-primary);
    padding: 2.5rem;
}

.auth-logo {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-logo img {
    width: 60px;
    height: 60px;
    margin-bottom: 1rem;
}

.auth-logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.auth-logo p {
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

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

.form-group label {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.form-group input {
    padding: 0.875rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.auth-submit {
    width: 100%;
    padding: 1rem;
    margin-top: 0.5rem;
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-secondary);
}

.auth-footer a {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
}

.auth-footer a:hover {
    text-decoration: underline;
}

.auth-error {
    background: rgba(248, 81, 73, 0.1);
    border: 1px solid var(--danger);
    color: var(--danger);
    padding: 0.875rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.auth-success {
    background: rgba(63, 185, 80, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
    padding: 0.875rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.verification-input {
    text-align: center;
    font-size: 1.5rem !important;
    letter-spacing: 0.5rem;
    font-weight: 600;
}

.resend-code {
    text-align: center;
    margin-top: 1rem;
}

.resend-code button {
    background: none;
    border: none;
    color: var(--accent-primary);
    font-weight: 500;
    cursor: pointer;
    font-size: 0.9rem;
    font-family: inherit;
}

.resend-code button:hover {
    text-decoration: underline;
}

.resend-code button:disabled {
    color: var(--text-muted);
    cursor: not-allowed;
}

/* Password strength indicator */
.password-strength {
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    margin-top: 0.5rem;
    overflow: hidden;
}

.password-strength .bar {
    height: 100%;
    width: 0;
    transition: all 0.3s;
    border-radius: 2px;
}

.password-strength .bar.weak { width: 33%; background: var(--danger); }
.password-strength .bar.medium { width: 66%; background: var(--warning); }
.password-strength .bar.strong { width: 100%; background: var(--success); }

.password-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-image {
        display: none;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero-text h1 {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .stat-item {
        padding: 1.5rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        justify-content: center;
    }
}

/* ============================================
   Legal Pages (Privacy, Terms, Cookies)
   ============================================ */

.legal-container {
    padding-top: calc(var(--nav-height) + 60px);
    padding-bottom: 80px;
    min-height: 100vh;
}

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

.legal-content h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.legal-updated {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 40px;
}

.legal-section {
    margin-bottom: 40px;
}

.legal-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-primary);
}

.legal-section h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 20px 0 12px;
}

.legal-section p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 12px;
}

.legal-section ul,
.legal-section ol {
    color: var(--text-secondary);
    margin: 12px 0;
    padding-left: 24px;
    line-height: 1.8;
}

.legal-section li {
    margin-bottom: 8px;
}

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

.legal-section a:hover {
    color: var(--accent-secondary);
    text-decoration: underline;
}

.legal-section strong {
    color: var(--text-primary);
}

.legal-section code {
    background: var(--bg-secondary);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 13px;
    color: var(--accent-primary);
}