/* ============================================
   Video2Comic Landing Page — Premium Dark Theme
   ============================================ */

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

:root {
    --bg-primary: #050816;
    --bg-secondary: #0a0e27;
    --bg-card: rgba(15, 20, 50, 0.6);
    --bg-card-hover: rgba(25, 30, 70, 0.8);
    --text-primary: #e8e8f0;
    --text-secondary: #8888a8;
    --text-muted: #55557a;
    --accent-purple: #7c3aed;
    --accent-cyan: #06b6d4;
    --accent-pink: #ec4899;
    --gradient-main: linear-gradient(135deg, #7c3aed 0%, #06b6d4 100%);
    --gradient-bg: linear-gradient(180deg, #050816 0%, #0a0e27 30%, #0d1033 70%, #050816 100%);
    --gradient-card: linear-gradient(135deg, rgba(124,58,237,0.1), rgba(6,182,212,0.05));
    --border-subtle: rgba(124, 58, 237, 0.15);
    --border-glow: rgba(124, 58, 237, 0.4);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --shadow-glow: 0 0 60px rgba(124, 58, 237, 0.15);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Particle canvas */
#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

/* --- Reveal Animations --- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 16px 0;
    transition: background var(--transition), backdrop-filter var(--transition);
    background: transparent;
}
.nav.scrolled {
    background: rgba(5, 8, 22, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
}
.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
}
.logo-icon {
    font-size: 1.5rem;
    filter: drop-shadow(0 0 8px rgba(124, 58, 237, 0.6));
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}
.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition);
}
.nav-links a:hover {
    color: var(--text-primary);
}
.nav-cta {
    background: var(--gradient-main) !important;
    color: white !important;
    padding: 10px 24px;
    border-radius: 100px;
    font-weight: 600 !important;
    transition: transform var(--transition), box-shadow var(--transition) !important;
}
.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(124, 58, 237, 0.4);
}

/* --- Text Gradient --- */
.text-gradient {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 100px;
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font);
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all var(--transition);
}
.btn-primary {
    background: var(--gradient-main);
    color: white;
    box-shadow: 0 4px 20px rgba(124, 58, 237, 0.3);
}
.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 40px rgba(124, 58, 237, 0.5);
}
.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-subtle);
}
.btn-ghost:hover {
    color: var(--text-primary);
    border-color: var(--border-glow);
    background: rgba(124, 58, 237, 0.05);
}

/* --- Hero Section --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 60px;
    padding: 120px 24px 80px;
    max-width: 1300px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}
.hero-content {
    flex: 1;
    max-width: 600px;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 20px;
    border-radius: 100px;
    border: 1px solid var(--border-subtle);
    background: rgba(124, 58, 237, 0.08);
    color: var(--accent-purple);
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 28px;
}
.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-purple);
    animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(124, 58, 237, 0.4); }
    50% { opacity: 0.7; box-shadow: 0 0 0 8px rgba(124, 58, 237, 0); }
}
.hero-title {
    font-size: clamp(2.8rem, 5vw, 4.2rem);
    font-weight: 900;
    line-height: 1.08;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
}
.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 40px;
    max-width: 520px;
}
.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}
.hero-image {
    flex: 1;
    max-width: 560px;
    position: relative;
}
.hero-image img {
    width: 100%;
    border-radius: var(--radius-lg);
    position: relative;
    z-index: 1;
    animation: float 6s ease-in-out infinite;
}
.hero-image-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    height: 80%;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.25) 0%, transparent 70%);
    filter: blur(60px);
    z-index: 0;
}
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-16px); }
}

/* --- Section Shared --- */
.section-header {
    text-align: center;
    margin-bottom: 64px;
}
.section-tag {
    display: inline-block;
    padding: 6px 18px;
    border-radius: 100px;
    border: 1px solid var(--border-subtle);
    color: var(--accent-cyan);
    font-weight: 600;
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 20px;
}
.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.15;
    margin-bottom: 16px;
}
.section-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

/* --- Features --- */
.features {
    padding: 120px 0;
    position: relative;
    z-index: 1;
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    transition: all var(--transition);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}
.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-main);
    opacity: 0;
    transition: opacity var(--transition);
}
.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-glow);
    transform: translateY(-6px);
    box-shadow: var(--shadow-glow);
}
.feature-card:hover::before {
    opacity: 1;
}
.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    background: rgba(124, 58, 237, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: var(--accent-purple);
    overflow: hidden;
}
.feature-icon-cyan {
    background: rgba(6, 182, 212, 0.12);
    color: var(--accent-cyan);
}
.feature-icon-pink {
    background: rgba(236, 72, 153, 0.12);
    color: var(--accent-pink);
}
.feature-card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-sm);
}
.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}
.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.65;
}

/* --- How It Works --- */
.how-it-works {
    padding: 120px 0;
    position: relative;
    z-index: 1;
}
.steps {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: stretch;
}
.step {
    display: flex;
    gap: 32px;
    align-items: flex-start;
    padding: 32px;
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    backdrop-filter: blur(10px);
    transition: all var(--transition);
}
.step:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
    transform: translateX(8px);
}
.step-number {
    font-size: 2.5rem;
    font-weight: 900;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    flex-shrink: 0;
}
.step-content h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.step-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}
.step-connector {
    width: 2px;
    height: 40px;
    background: linear-gradient(to bottom, var(--accent-purple), transparent);
    margin: 0 0 0 56px;
}

/* --- Signup Section --- */
.signup {
    padding: 120px 0;
    position: relative;
    z-index: 1;
}
.signup-card {
    max-width: 650px;
    margin: 0 auto;
    text-align: center;
    padding: 64px 48px;
    border-radius: var(--radius-xl);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
}
.signup-glow {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.15) 0%, transparent 70%);
    pointer-events: none;
}
.signup-desc {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 36px;
    max-width: 440px;
    margin-left: auto;
    margin-right: auto;
}
.signup-form {
    position: relative;
    z-index: 1;
}
.input-group {
    display: flex;
    gap: 12px;
    max-width: 480px;
    margin: 0 auto;
}
.input-group input {
    flex: 1;
    padding: 16px 24px;
    border-radius: 100px;
    border: 1px solid var(--border-subtle);
    background: rgba(10, 14, 39, 0.8);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: var(--font);
    outline: none;
    transition: all var(--transition);
}
.input-group input::placeholder {
    color: var(--text-muted);
}
.input-group input:focus {
    border-color: var(--accent-purple);
    box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.15), 0 0 30px rgba(124, 58, 237, 0.1);
}
.btn-submit {
    padding: 16px 32px;
    white-space: nowrap;
    flex-shrink: 0;
}
.input-hint {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-top: 16px;
}
.signup-success {
    text-align: center;
    animation: fadeInUp 0.5s ease;
}
.success-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}
.signup-success h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.signup-success p {
    color: var(--text-secondary);
}

/* --- Spinner --- */
.spinner {
    animation: spin 1s linear infinite;
}
@keyframes spin {
    100% { transform: rotate(360deg); }
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Footer --- */
.footer {
    padding: 60px 0 30px;
    border-top: 1px solid var(--border-subtle);
    position: relative;
    z-index: 1;
}
.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
}
.footer-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.2rem;
    font-weight: 800;
}
.footer-text {
    color: var(--text-muted);
    font-size: 0.9rem;
}
.footer-links {
    display: flex;
    gap: 16px;
}
.footer-links a {
    color: var(--text-muted);
    transition: color var(--transition);
}
.footer-links a:hover {
    color: var(--text-primary);
}
.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(124, 58, 237, 0.08);
}
.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* --- Responsive --- */
@media (max-width: 968px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 140px;
        gap: 40px;
    }
    .hero-content {
        max-width: 100%;
    }
    .hero-subtitle {
        max-width: 100%;
    }
    .hero-cta {
        justify-content: center;
    }
    .hero-image {
        max-width: 100%;
    }
    .features-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
    .nav-links a:not(.nav-cta) {
        display: none;
    }
    .footer-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

@media (max-width: 600px) {
    .hero-title {
        font-size: 2.2rem;
    }
    .section-title {
        font-size: 1.8rem;
    }
    .input-group {
        flex-direction: column;
    }
    .signup-card {
        padding: 40px 24px;
    }
    .step {
        gap: 20px;
        padding: 24px;
    }
    .step-number {
        font-size: 2rem;
    }
    .step-connector {
        margin-left: 40px;
    }
}