/* 
 * BookVídeoPlay - Premium Dark Mode Styles
 * Typography: Outfit for Headings (modern tech), Inter for Body text.
 */

:root {
    /* Colors */
    --bg-dark: #050505;
    --bg-darker: #000000;
    --surface: rgba(255, 255, 255, 0.03);
    --surface-hover: rgba(255, 255, 255, 0.06);
    --surface-border: rgba(255, 255, 255, 0.08);
    
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    
    --accent-blue: #3b82f6;
    --accent-purple: #a855f7;
    --accent-gradient: linear-gradient(135deg, #6366f1, #a855f7, #ec4899);
    --accent-subtle: rgba(168, 85, 247, 0.15);
    
    --error-red: #ef4444;
    --success-green: #10b981;
    
    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Spacing & Sizes */
    --container-width: 1100px;
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
    width: 100%;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    width: 100%;
    position: relative;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography Base */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

a {
    text-decoration: none;
    color: inherit;
}

/* Utility Classes */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.max-w-md { max-width: 600px; margin-left: auto; margin-right: auto; }

.text-gradient {
    background: var(--accent-gradient);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    animation: gradientShift 5s ease infinite;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

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

.bg-alternate {
    background: linear-gradient(to bottom, transparent, rgba(255,255,255,0.01), transparent);
}

/* Grids */
.grid {
    display: grid;
    gap: 24px;
}

/* Background Grid */
.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: -2;
    pointer-events: none;
    -webkit-mask-image: linear-gradient(to bottom, black 30%, transparent 100%);
    mask-image: linear-gradient(to bottom, black 30%, transparent 100%);
}

/* Background Glows */
.bg-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--accent-subtle) 0%, transparent 70%);
    border-radius: 50%;
    z-index: -1;
    pointer-events: none;
}

@keyframes float {
    0% { transform: translateY(0px) translateX(-50%); }
    50% { transform: translateY(-30px) translateX(-50%); }
    100% { transform: translateY(0px) translateX(-50%); }
}

@keyframes float-alt {
    0% { transform: translateY(0px); }
    50% { transform: translateY(30px); }
    100% { transform: translateY(0px); }
}

.top-glow {
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    animation: float 8s ease-in-out infinite;
}

.bottom-glow {
    bottom: -200px;
    right: -200px;
    width: 800px;
    height: 800px;
    opacity: 0.5;
    animation: float-alt 10s ease-in-out infinite reverse;
}

/* Navigation */
.navbar {
    position: relative; 
    width: 100%;
    z-index: 100;
    background: transparent;
    border: none;
    padding-top: 40px;
    padding-bottom: 24px;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-centered {
    justify-content: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.01em;
}

.logo-img {
    height: 260px;
    width: auto;
    object-fit: contain;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-body);
    font-weight: 600;
    border-radius: 100px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.875rem;
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.125rem;
}

.btn-massive {
    padding: 20px 48px;
    font-size: 1.25rem;
    width: 100%;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--surface-border);
    color: var(--text-primary);
}

.btn-outline:hover {
    background: var(--surface);
    border-color: var(--text-secondary);
}

.btn-primary {
    position: relative;
    overflow: hidden;
    background: var(--text-primary);
    color: var(--bg-dark);
    border: none;
    box-shadow: 0 4px 14px rgba(255,255,255,0.1);
}

.btn-primary::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.4), transparent);
    transform: skewX(-20deg);
    animation: shine 4s infinite 2s;
}

@keyframes shine {
    0% { left: -100%; }
    20% { left: 200%; }
    100% { left: 200%; }
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255,255,255,0.25);
}

.btn-primary i {
    transition: transform var(--transition-fast);
}

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

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.4); }
    70% { box-shadow: 0 0 0 15px rgba(255, 255, 255, 0); }
    100% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0); }
}

.animate-pulse {
    animation: pulse 2s infinite;
}

/* Sections Base */
section {
    padding: 120px 0;
}

.section-header {
    margin-bottom: 64px;
}

.section-title {
    font-size: 3rem;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

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

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

/* Glass Elements */
.glass-panel, .glass-card {
    background: var(--surface);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--surface-border);
    border-radius: var(--border-radius-lg);
    transition: var(--transition-fast);
    box-shadow: inset 0 1px 0 0 rgba(255,255,255,0.05), 0 4px 24px rgba(0,0,0,0.3);
}

.glass-card {
    padding: 32px;
}

.glass-card:hover {
    background: var(--surface-hover);
    border-color: rgba(255,255,255,0.2);
    transform: translateY(-6px);
    box-shadow: inset 0 1px 0 0 rgba(255,255,255,0.15), 0 12px 32px rgba(168, 85, 247, 0.15);
}

/* Hero Section */
.hero {
    padding-top: 20px;
    padding-bottom: 80px;
    text-align: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.badge {
    background: var(--surface);
    border: 1px solid var(--surface-border);
    padding: 6px 16px;
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 24px;
    letter-spacing: 0.02em;
}

.headline {
    font-size: 4.5rem;
    max-width: 800px;
    margin-bottom: 24px;
}

.subheadline {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    max-width: 700px;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-muted);
    max-width: 500px;
    margin-bottom: 40px;
}

.hero-cta {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    margin-bottom: 80px;
}

.guarantee-text {
    font-size: 0.875rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
}

.guarantee-text i {
    width: 16px;
    height: 16px;
    color: var(--success-green);
}

/* Hero Visual Mockup */
.hero-visual {
    width: 100%;
    max-width: 800px;
}

.mockup {
    background: linear-gradient(to bottom, rgba(20,20,20,0.8), rgba(5,5,5,1));
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    border-top-color: rgba(255,255,255,0.15);
}

.mockup-header {
    height: 48px;
    border-bottom: 1px solid var(--surface-border);
    display: flex;
    align-items: center;
    padding: 0 16px;
    position: relative;
}

.dots {
    display: flex;
    gap: 6px;
}

.dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--surface-border);
}

.dots span:nth-child(1) { background: #ef4444; }
.dots span:nth-child(2) { background: #f59e0b; }
.dots span:nth-child(3) { background: #10b981; }

.mockup-header .title {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.video-mockup {
    aspect-ratio: 16 / 9;
    height: auto;
}

.video-container {
    width: 100%;
    height: calc(100% - 48px); /* subtract header height */
    position: relative;
    background: #000;
}

.video-container video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

/* Problem Section */
.cards-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--surface);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.card-icon.red { color: var(--error-red); background: rgba(239, 68, 68, 0.1); }

/* Solution Section */
.solution-features {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    margin-top: 64px;
}

.feature-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 32px;
    border-radius: var(--border-radius-md);
    background: var(--surface);
    transition: var(--transition-fast);
}

.feature-item:hover {
    background: var(--surface-hover);
}

.feature-item i {
    width: 32px;
    height: 32px;
    color: var(--text-primary);
}

/* How It Works */
.split-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.steps-list {
    display: flex;
    flex-direction: column;
    gap: 32px;
    margin-top: 48px;
}

.step {
    display: flex;
    gap: 24px;
}

.step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--surface-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
    flex-shrink: 0;
    color: var(--text-primary);
}

.step-content h3 {
    font-size: 1.25rem;
    margin-bottom: 8px;
}

.step-content p {
    color: var(--text-secondary);
}

.visual-side {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.glass-shape {
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.02);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 40px;
    transform: rotate(15deg);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.huge-icon {
    width: 80px;
    height: 80px;
    color: var(--text-primary);
    transform: rotate(-15deg);
}

img.huge-icon {
    width: 200px;
    height: auto;
    object-fit: contain;
    filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.2));
}

.glow-sphere {
    position: absolute;
    width: 200px;
    height: 200px;
    background: var(--accent-gradient);
    filter: blur(60px);
    opacity: 0.3;
    z-index: -1;
}

/* Ecosystem Section */
.ecosystem {
    padding-top: 100px;
    padding-bottom: 100px;
}

.ecosystem-grid {
    grid-template-columns: repeat(2, 1fr);
    margin-top: 64px;
    gap: 32px;
}

@media (min-width: 900px) {
    .ecosystem-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Benefits Grid */
.benefit-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.benefit-card {
    display: flex;
    gap: 24px;
    padding: 32px;
    background: var(--surface);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--surface-border);
}

.benefit-card .icon-wrap {
    width: 56px;
    height: 56px;
    background: rgba(255,255,255,0.05);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.benefit-card h3 {
    margin-bottom: 8px;
    font-size: 1.25rem;
}

.benefit-card p {
    color: var(--text-secondary);
}

/* Target Audience */
.audience-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    margin-top: 48px;
}

.tag {
    background: var(--surface);
    border: 1px solid var(--surface-border);
    padding: 12px 24px;
    border-radius: 100px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition-fast);
}

.tag:hover {
    background: var(--surface-hover);
    border-color: rgba(255,255,255,0.2);
}

/* Social Proof */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-top: 48px;
}

.testimonial {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.stars {
    color: #fbbf24;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.quote {
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: 24px;
    flex-grow: 1;
}

.author {
    display: flex;
    align-items: center;
    gap: 16px;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--surface-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
}

.author .info strong {
    display: block;
    line-height: 1.2;
}

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

/* Offer Section */
.offer-section {
    padding-top: 60px;
}

.offer-card {
    max-width: 600px;
    margin: 0 auto;
    padding: 48px;
    border: 1px solid rgba(255,255,255,0.15);
    background: linear-gradient(to bottom, rgba(20,20,20,0.8), rgba(5,5,5,0.9));
    box-shadow: 0 40px 80px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.05) inset;
    position: relative;
    overflow: hidden;
}

.offer-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--accent-gradient);
}

.product-badge {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
}

.product-title {
    font-size: 2.5rem;
    margin-bottom: 8px;
}

.product-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-weight: 500;
    margin-bottom: 16px;
}

.delivery-format {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 32px;
}

.price-box {
    text-align: center;
    margin-bottom: 40px;
}

.currency {
    font-size: 1.5rem;
    font-weight: 600;
    vertical-align: top;
    position: relative;
    top: 12px;
    color: var(--text-secondary);
}

.amount {
    font-size: 4.5rem;
    font-weight: 800;
    font-family: var(--font-heading);
    letter-spacing: -0.04em;
    line-height: 1;
}

.cents {
    font-size: 1.5rem;
    font-weight: 700;
    vertical-align: top;
    position: relative;
    top: 12px;
}

.frequency {
    display: block;
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 8px;
}

.offer-includes {
    list-style: none;
    margin-bottom: 48px;
}

.offer-includes li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    font-size: 1.125rem;
    color: var(--text-secondary);
}

.offer-includes li i.check {
    color: var(--success-green);
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.cta-wrapper .final-call {
    font-size: 1.25rem;
    margin-bottom: 24px;
}

.secure-checkout {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 16px;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.secure-checkout i {
    width: 14px;
    height: 14px;
}

/* Footer */
.footer {
    padding: 64px 0 48px;
    border-top: 1px solid var(--surface-border);
    margin-top: 60px;
    background: linear-gradient(to top, rgba(20, 20, 20, 0.4), transparent);
}

.footer-logo {
    justify-content: center;
    margin-bottom: 24px;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 32px;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition-fast);
}

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

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

/* Responsive */
@media (max-width: 900px) {
    .headline { font-size: 3.5rem; }
    .split-layout { grid-template-columns: 1fr; gap: 40px; }
    .visual-side { order: -1; }
    .benefit-grid { grid-template-columns: 1fr; }
    .ecosystem-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
    .headline { font-size: 2.5rem; }
    .subheadline { font-size: 1.25rem; }
    .section-title { font-size: 2.25rem; }
    .video-mockup { width: 100%; aspect-ratio: auto; }
    .video-container { height: 250px; }
    .hero { padding-top: 140px; }
    .btn-massive { font-size: 1.125rem; padding: 16px 24px; }
    .offer-card { padding: 32px 24px; }
}