/* ============================================
   ALFI — Dark Cosmic Design System
   ============================================ */

/* --- Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* --- Tokens --- */
:root {
    --bg-deep: #06060f;
    --bg-main: #0a0a1a;
    --bg-surface: #111128;
    --glass: rgba(255, 255, 255, 0.04);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-hover: rgba(255, 255, 255, 0.08);

    --accent: #00d4aa;
    --accent-glow: rgba(0, 212, 170, 0.3);
    --accent-soft: rgba(0, 212, 170, 0.1);
    --blue: #4a90d9;
    --pink: #e84393;
    --orange: #f39c12;
    --red: #e74c3c;

    --text-primary: #e8e8f0;
    --text-secondary: #8888a0;
    --text-dim: #555570;

    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-pill: 50px;

    --max-width: 1200px;
    --content-width: 800px;

    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-main);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.3s;
}

a:hover {
    color: #33e8c0;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(6, 6, 15, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    transition: background 0.3s;
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-weight: 800;
    font-size: 1.4rem;
    letter-spacing: 2px;
    color: var(--text-primary);
    text-decoration: none;
}

.nav-logo span {
    color: var(--accent);
}

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

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: color 0.3s;
    letter-spacing: 0.3px;
}

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

.nav-cta {
    background: var(--accent) !important;
    color: var(--bg-deep) !important;
    padding: 8px 20px !important;
    border-radius: var(--radius-pill) !important;
    font-weight: 600 !important;
    font-size: 0.85rem !important;
    transition: transform 0.2s, box-shadow 0.2s !important;
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px var(--accent-glow) !important;
    color: var(--bg-deep) !important;
}

/* Mobile nav toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s;
}

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

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 24px 80px;
    position: relative;
    overflow: hidden;
    background: radial-gradient(ellipse at 50% 0%, rgba(0, 212, 170, 0.08) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 50%, rgba(74, 144, 217, 0.05) 0%, transparent 50%),
                var(--bg-main);
}

/* Animated star particles */
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(1px 1px at 10% 20%, rgba(255,255,255,0.4) 0%, transparent 100%),
        radial-gradient(1px 1px at 30% 60%, rgba(255,255,255,0.3) 0%, transparent 100%),
        radial-gradient(1.5px 1.5px at 50% 10%, rgba(255,255,255,0.5) 0%, transparent 100%),
        radial-gradient(1px 1px at 70% 40%, rgba(255,255,255,0.3) 0%, transparent 100%),
        radial-gradient(1px 1px at 90% 80%, rgba(255,255,255,0.4) 0%, transparent 100%),
        radial-gradient(1.5px 1.5px at 15% 85%, rgba(255,255,255,0.3) 0%, transparent 100%),
        radial-gradient(1px 1px at 45% 45%, rgba(255,255,255,0.3) 0%, transparent 100%),
        radial-gradient(1px 1px at 75% 15%, rgba(255,255,255,0.4) 0%, transparent 100%),
        radial-gradient(1px 1px at 85% 65%, rgba(255,255,255,0.3) 0%, transparent 100%),
        radial-gradient(1.5px 1.5px at 25% 35%, rgba(255,255,255,0.2) 0%, transparent 100%);
    animation: twinkle 4s ease-in-out infinite alternate;
    pointer-events: none;
}

@keyframes twinkle {
    0% { opacity: 0.6; }
    100% { opacity: 1; }
}

.hero-badge {
    display: inline-block;
    background: var(--accent-soft);
    color: var(--accent);
    padding: 6px 18px;
    border-radius: var(--radius-pill);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 24px;
    border: 1px solid rgba(0, 212, 170, 0.2);
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    letter-spacing: -1px;
    position: relative;
    z-index: 1;
}

.hero h1 .gradient-text {
    background: linear-gradient(135deg, var(--accent), var(--blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 40px;
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

.hero-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    position: relative;
    z-index: 1;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--accent);
    color: var(--bg-deep);
    padding: 16px 40px;
    border-radius: var(--radius-pill);
    font-weight: 700;
    font-size: 1.05rem;
    text-decoration: none;
    transition: transform 0.25s, box-shadow 0.25s;
    box-shadow: 0 4px 30px var(--accent-glow);
    letter-spacing: 0.5px;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 40px var(--accent-glow);
    color: var(--bg-deep);
}

.btn-primary .arrow {
    font-size: 1.2rem;
    transition: transform 0.25s;
}

.btn-primary:hover .arrow {
    transform: translateX(4px);
}

/* Store buttons */
.store-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

.store-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--glass);
    color: var(--text-secondary);
    border: 1px solid var(--glass-border);
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.25s;
}

.store-badge:hover {
    background: var(--glass-hover);
    border-color: var(--accent);
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.store-badge i {
    font-size: 1.1rem;
}

/* Hero banner image */
.hero-banner-wrapper {
    max-width: 900px;
    margin: 60px auto 0;
    position: relative;
    z-index: 1;
}

.hero-banner-wrapper img {
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 80px rgba(0, 0, 0, 0.5),
                0 0 60px rgba(0, 212, 170, 0.1);
}

/* ============================================
   Section Base
   ============================================ */

.section {
    padding: 100px 24px;
    position: relative;
}

.section-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}

.section-label {
    display: inline-block;
    color: var(--accent);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    line-height: 1.7;
}

.section-subtitle.centered {
    margin: 0 auto;
}

/* Divider */
.section-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--glass-border), transparent);
    max-width: var(--max-width);
    margin: 0 auto;
}

/* ============================================
   Feature Showcase — Compatibility
   ============================================ */

.feature-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
}

.feature-row.reverse {
    direction: rtl;
}

.feature-row.reverse > * {
    direction: ltr;
}

.feature-text {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.feature-text h3 {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.feature-text p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.8;
}

.feature-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
}

.feature-tag {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: var(--radius-pill);
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.5px;
}

.feature-tag.accent {
    border-color: rgba(0, 212, 170, 0.3);
    color: var(--accent);
    background: var(--accent-soft);
}

.feature-image {
    position: relative;
}

.feature-image img {
    border-radius: var(--radius-md);
    box-shadow: 0 16px 60px rgba(0, 0, 0, 0.4);
    transition: transform 0.4s ease;
}

.feature-image:hover img {
    transform: scale(1.02);
}

/* Glow behind image */
.feature-image::before {
    content: '';
    position: absolute;
    inset: -20px;
    background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
    opacity: 0.3;
    border-radius: 50%;
    z-index: -1;
    filter: blur(40px);
}

/* Multi-image row */
.feature-images-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.feature-images-row img {
    border-radius: var(--radius-md);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
    transition: transform 0.4s ease;
}

.feature-images-row img:hover {
    transform: scale(1.03);
}

/* ============================================
   Pricing
   ============================================ */

.pricing-section {
    text-align: center;
}

.pricing-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    max-width: 700px;
    margin: 50px auto 0;
}

.price-card {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 40px 30px;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.price-card:hover {
    border-color: var(--glass-hover);
    transform: translateY(-4px);
}

.price-card.featured {
    border-color: var(--accent);
    background: linear-gradient(180deg, rgba(0, 212, 170, 0.06) 0%, var(--glass) 100%);
    box-shadow: 0 8px 40px rgba(0, 212, 170, 0.1);
}

.price-card.featured::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--blue));
}

.price-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.price-amount {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.price-period {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--text-secondary);
}

.price-desc {
    color: var(--text-dim);
    font-size: 0.95rem;
    margin-top: 8px;
}

.price-features {
    list-style: none;
    padding: 0;
    margin-top: 24px;
    text-align: left;
}

.price-features li {
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.price-features li i {
    color: var(--accent);
    font-size: 0.85rem;
}

.price-features li.disabled {
    color: var(--text-dim);
}

.price-features li.disabled i {
    color: var(--text-dim);
}

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

.download-section {
    text-align: center;
    background: radial-gradient(ellipse at center, rgba(0, 212, 170, 0.06) 0%, transparent 70%);
}

.download-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
    margin-top: 40px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
}

.download-btn:hover {
    background: var(--glass-hover);
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.download-btn i {
    font-size: 1.3rem;
}

.download-btn.web-btn {
    background: var(--accent);
    color: var(--bg-deep);
    border-color: var(--accent);
}

.download-btn.web-btn:hover {
    background: #33e8c0;
    color: var(--bg-deep);
    box-shadow: 0 8px 30px var(--accent-glow);
}

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

.site-footer {
    border-top: 1px solid var(--glass-border);
    padding: 40px 24px;
    text-align: center;
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.footer-logo {
    font-weight: 800;
    font-size: 1.2rem;
    letter-spacing: 2px;
    color: var(--text-primary);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px;
}

.footer-links a {
    color: var(--text-dim);
    font-size: 0.85rem;
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-social {
    display: flex;
    gap: 16px;
}

.footer-social a {
    color: var(--text-dim);
    font-size: 1.1rem;
    transition: color 0.3s;
}

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

.footer-copy {
    color: var(--text-dim);
    font-size: 0.8rem;
}

/* ============================================
   Scroll Animations
   ============================================ */

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ============================================
   Policy Pages (shared)
   ============================================ */

.policy-page {
    padding-top: 100px;
    min-height: 100vh;
}

.policy-content {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 40px 24px 80px;
}

.policy-content h1 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.policy-content .last-updated {
    color: var(--text-dim);
    font-size: 0.9rem;
    margin-bottom: 40px;
}

.policy-content h2 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-top: 40px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.policy-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-top: 24px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

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

.policy-content ul {
    color: var(--text-secondary);
    padding-left: 20px;
    margin-bottom: 16px;
}

.policy-content li {
    margin-bottom: 8px;
    line-height: 1.7;
}

.policy-content strong {
    color: var(--text-primary);
}

.policy-content a {
    color: var(--accent);
}

/* Support page specifics */
.support-center {
    text-align: center;
    min-height: 50vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

.support-center h1 {
    margin-bottom: 8px;
}

.support-center p {
    max-width: 500px;
}

.support-social {
    display: flex;
    gap: 16px;
    margin-top: 8px;
}

.support-social a {
    color: var(--accent);
    font-weight: 500;
}

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

@media (max-width: 900px) {
    .feature-row {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .feature-row.reverse {
        direction: ltr;
    }

    .feature-image {
        order: -1;
        max-width: 400px;
        margin: 0 auto;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(6, 6, 15, 0.95);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 20px;
        border-bottom: 1px solid var(--glass-border);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding: 100px 20px 60px;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .section {
        padding: 60px 20px;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .feature-images-row {
        grid-template-columns: 1fr;
    }

    .store-badges {
        gap: 8px;
    }

    .store-badge {
        flex: 1 1 40%;
        justify-content: center;
        font-size: 0.82rem;
        padding: 8px 12px;
    }

    .download-buttons {
        flex-direction: column;
        align-items: center;
    }

    .download-btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.9rem;
    }

    .hero-subtitle {
        font-size: 0.95rem;
    }

    .price-amount {
        font-size: 2.2rem;
    }
}

/* ============================================
   Theory page override (preserve existing)
   ============================================ */

.paper-content {
    max-width: var(--content-width);
    margin: 3rem auto;
    padding: 40px;
    background: var(--bg-surface);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
}

article {
    font-family: 'Georgia', 'Merriweather', serif;
    font-size: 1.1rem;
    color: var(--text-secondary);
}

article h1,
article h2,
article h3 {
    font-family: var(--font);
    color: var(--text-primary);
    margin-top: 2.5rem;
}

article p {
    margin-bottom: 1.5rem;
}

article blockquote {
    border-left: 4px solid var(--accent);
    padding: 15px 20px;
    margin: 20px 0;
    color: var(--text-secondary);
    background: var(--glass);
}

article ul,
article ol {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

article li {
    margin-bottom: 0.5rem;
}