/* =============================================
   OPERA GX PRELANDER - STYLE.CSS
   Mobile-first, Gaming Theme, Performance-optimized
   ============================================= */

/* CSS Variables */
:root {
    --color-bg: #0f0f1a;
    --color-bg-card: #1a1a2e;
    --color-bg-card-hover: #252542;
    --color-accent-red: #ff0050;
    --color-accent-red-hover: #ff3377;
    --color-accent-cyan: #00dbdb;
    --color-text: #ffffff;
    --color-text-muted: #a0a0b0;
    --color-border: #2a2a45;
    --color-glow-red: rgba(255, 0, 80, 0.3);
    --color-glow-cyan: rgba(0, 219, 219, 0.2);
    
    --font-system: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

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

/* Container */
.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* =============================================
   TOP BAR (Sticky)
   ============================================= */
.top-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: linear-gradient(180deg, var(--color-bg) 0%, rgba(15, 15, 26, 0.95) 100%);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-xs) 0;
}

.top-bar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.logo-link {
    display: flex;
    align-items: center;
}

.logo {
    height: 32px;
    width: auto;
}

/* =============================================
   CTA BUTTONS
   ============================================= */
.cta-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xs) var(--spacing-md);
    background: linear-gradient(135deg, var(--color-accent-red) 0%, #cc003f 100%);
    color: var(--color-text);
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: 0 4px 15px var(--color-glow-red);
}

.cta-btn:hover,
.cta-btn:focus {
    background: linear-gradient(135deg, var(--color-accent-red-hover) 0%, var(--color-accent-red) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--color-glow-red);
    outline: none;
}

.cta-btn:focus-visible {
    outline: 2px solid var(--color-accent-cyan);
    outline-offset: 2px;
}

.cta-btn--header {
    font-size: 0.85rem;
    padding: 0.4rem 1rem;
}

.cta-btn--footer {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 1.1rem;
}

.cta-btn--scroll {
    padding: 0.5rem 1.25rem;
    font-size: 0.9rem;
}

/* =============================================
   HERO SECTION
   ============================================= */
.hero {
    padding: calc(80px + var(--spacing-xl)) var(--spacing-sm) var(--spacing-xl);
    text-align: center;
    background: radial-gradient(ellipse at top center, rgba(255, 0, 80, 0.08) 0%, transparent 60%);
}

.hero-title {
    font-size: clamp(1.75rem, 5vw, 3rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
}

.hero-bullets {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    text-align: left;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

.hero-bullet {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xs);
    font-size: 1rem;
    color: var(--color-text);
}

.bullet-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.hero-note {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--color-accent-cyan);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-glow-cyan);
    border-radius: var(--radius-sm);
}

.note-icon {
    font-weight: 700;
}

/* =============================================
   SECTION TITLES
   ============================================= */
.section-title {
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
}

/* =============================================
   FEATURES SECTION
   ============================================= */
.features {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-card);
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.feature-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
    transition: all var(--transition-base);
}

.feature-card:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-accent-red);
    box-shadow: 0 0 20px var(--color-glow-red);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.feature-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.feature-desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

/* =============================================
   WHY IT WORKS SECTION
   ============================================= */
.why-works {
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.why-text {
    font-size: 1rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
    line-height: 1.7;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    max-width: 400px;
    margin: 0 auto var(--spacing-md);
}

.stat-card {
    background: linear-gradient(135deg, var(--color-bg-card) 0%, var(--color-bg-card-hover) 100%);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-accent-cyan);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.disclaimer-small {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    opacity: 0.7;
}

/* =============================================
   REVIEWS SECTION
   ============================================= */
.reviews {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-card);
}

.reviews-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.review-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.review-stars {
    color: #ffd700;
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
    letter-spacing: 2px;
}

.review-text {
    font-size: 0.95rem;
    color: var(--color-text);
    font-style: italic;
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

.review-author {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

/* =============================================
   FAQ SECTION
   ============================================= */
.faq {
    padding: var(--spacing-xl) 0;
}

.faq-list {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.faq-item {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.faq-question {
    padding: var(--spacing-md);
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    color: var(--color-text);
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background var(--transition-fast);
}

.faq-question::-webkit-details-marker {
    display: none;
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--color-accent-red);
    transition: transform var(--transition-fast);
}

.faq-item[open] .faq-question::after {
    transform: rotate(45deg);
}

.faq-question:hover {
    background: var(--color-bg-card-hover);
}

.faq-question:focus-visible {
    outline: 2px solid var(--color-accent-cyan);
    outline-offset: -2px;
}

.faq-answer {
    padding: 0 var(--spacing-md) var(--spacing-md);
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    background: linear-gradient(180deg, var(--color-bg) 0%, #0a0a14 100%);
    text-align: center;
    border-top: 1px solid var(--color-border);
}

.footer .cta-btn {
    margin-bottom: var(--spacing-lg);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-link {
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 0.85rem;
    cursor: pointer;
    text-decoration: underline;
    transition: color var(--transition-fast);
}

.footer-link:hover,
.footer-link:focus {
    color: var(--color-accent-cyan);
    outline: none;
}

.footer-link:focus-visible {
    outline: 2px solid var(--color-accent-cyan);
    outline-offset: 2px;
}

.footer-disclaimer {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    opacity: 0.6;
    max-width: 500px;
    margin: 0 auto;
    line-height: 1.5;
}

/* =============================================
   SCROLL INTENT CTA BAR
   ============================================= */
.scroll-cta-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 99;
    background: linear-gradient(180deg, rgba(15, 15, 26, 0.95) 0%, var(--color-bg) 100%);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-sm);
    transform: translateY(100%);
    opacity: 0;
    transition: all var(--transition-base);
    pointer-events: none;
}

.scroll-cta-bar.visible {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
}

.scroll-cta-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.scroll-cta-text {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* =============================================
   MODALS
   ============================================= */
.modal {
    position: fixed;
    inset: 0;
    z-index: 200;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
}

.modal[open] {
    opacity: 1;
    pointer-events: auto;
}

.modal::backdrop {
    background: rgba(0, 0, 0, 0.8);
}

.modal-content {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    padding: var(--spacing-lg);
    position: relative;
}

.modal-close {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.modal-close:hover,
.modal-close:focus {
    background: var(--color-bg-card-hover);
    color: var(--color-text);
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
    padding-right: 40px;
}

.modal-body p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

.modal-body p:last-child {
    margin-bottom: 0;
}

/* =============================================
   RESPONSIVE - TABLET+
   ============================================= */
@media (min-width: 640px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .features-grid,
    .reviews-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .hero-bullets {
        max-width: 500px;
    }
    
    .cta-btn--footer {
        padding: var(--spacing-sm) var(--spacing-xl);
    }
}

/* =============================================
   RESPONSIVE - DESKTOP
   ============================================= */
@media (min-width: 1024px) {
    .hero {
        padding-top: calc(80px + var(--spacing-2xl));
        padding-bottom: var(--spacing-2xl);
    }
    
    .features,
    .why-works,
    .reviews,
    .faq {
        padding: var(--spacing-2xl) 0;
    }
    
    .stats-grid {
        max-width: 500px;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
}

/* =============================================
   REDUCED MOTION
   ============================================= */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}