/* ============================================
   SOLANABILLBOARD.COM - PREMIUM DARK DESIGN
   ============================================ */

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

:root {
    --bg-dark: #0a0a0a;
    --bg-darker: #050505;
    --bg-card: #0f0f0f;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #707070;
    --accent-primary: #14f195;
    --accent-secondary: #00d4ff;
    --border: #1a1a1a;
    --border-light: #252525;
    --hover-glow: rgba(20, 241, 149, 0.3);
    --blue-glow: rgba(0, 212, 255, 0.3);
    --error: #ff1744;
}

body {
    background-color: var(--bg-dark);
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(20, 241, 149, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 212, 255, 0.02) 0%, transparent 50%);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    letter-spacing: 0.3px;
}

/* ============================================
   HEADER (Sticky)
   ============================================ */

.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: rgba(5, 5, 5, 0.92);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.header-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 18px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
}

.logo-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.logo-wrapper:hover {
    transform: translateY(-2px);
}

.logo-icon {
    font-size: 20px;
    color: var(--accent-primary);
    font-weight: 900;
    line-height: 1;
    animation: pulse-icon 2s ease-in-out infinite;
}

@keyframes pulse-icon {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.logo {
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-tagline {
    font-size: 11px;
    color: var(--accent-primary);
    letter-spacing: 0.8px;
    text-transform: uppercase;
    font-weight: 700;
    margin-top: 2px;
    opacity: 0.9;
}

.nav {
    display: flex;
    gap: 28px;
    align-items: center;
    margin-left: auto;
}

.nav-link {
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), transparent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.nav-link:hover::after {
    transform: scaleX(1);
}

.nav-promote {
    color: var(--text-primary);
    background: linear-gradient(135deg, rgba(20, 241, 149, 0.15), rgba(0, 212, 255, 0.1));
    border: 1px solid var(--border-light);
    padding: 10px 18px;
    border-radius: 6px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    transition: all 0.3s ease;
}

.nav-promote:hover {
    background: linear-gradient(135deg, rgba(20, 241, 149, 0.25), rgba(0, 212, 255, 0.15));
    border-color: var(--accent-primary);
    box-shadow: 0 0 20px var(--hover-glow);
}

.nav-promote::after {
    display: none;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    background: linear-gradient(135deg, 
        rgba(20, 241, 149, 0.08) 0%, 
        rgba(0, 212, 255, 0.05) 100%);
    border-bottom: 1px solid var(--border);
    padding: 32px 16px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 60%;
    height: 150%;
    background: radial-gradient(circle, rgba(20, 241, 149, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -50%;
    left: -20%;
    width: 60%;
    height: 150%;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.04) 0%, transparent 70%);
    pointer-events: none;
}

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

.hero-content {
    text-align: center;
}

.hero-title {
    font-size: 36px;
    font-weight: 900;
    margin-bottom: 8px;
    letter-spacing: -1px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.5;
    font-weight: 500;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 12px;
    max-width: 700px;
    margin: 0 auto;
}

.stat {
    background: rgba(15, 15, 15, 0.6);
    border: 1px solid var(--border-light);
    padding: 12px 10px;
    border-radius: 8px;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.stat:hover {
    border-color: var(--accent-primary);
    background: rgba(20, 241, 149, 0.08);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(20, 241, 149, 0.1);
}

.stat-value {
    font-size: 22px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
    letter-spacing: -1px;
}

.stat-label {
    font-size: 10px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.6px;
    font-weight: 700;
}

/* ============================================
   BILLBOARD SECTION
   ============================================ */

.billboard {
    background-color: var(--bg-dark);
    padding: 48px 16px;
    min-height: auto;
}

.banner-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.featured-banner {
    grid-column: 1 / -1;
    aspect-ratio: 16/5;
}

.featured-banner:hover {
    transform: translateY(-8px) scale(1.01);
}

.banner-slot {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--bg-card) 0%, #141414 100%);
    aspect-ratio: 16/6;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.320, 1);
    border: 1px solid var(--border);
    display: block;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.banner-slot:hover {
    border-color: var(--accent-primary);
    box-shadow: 
        0 0 30px var(--hover-glow),
        inset 0 0 20px var(--hover-glow),
        0 12px 36px rgba(0, 0, 0, 0.5);
    transform: translateY(-6px) scale(1.01);
}

.banner-slot img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

.banner-slot:hover img {
    transform: scale(1.05);
}

/* ============================================
   PROMOTE WITH US SECTION
   ============================================ */

.promote {
    background-color: var(--bg-darker);
    background-image: 
        linear-gradient(135deg, rgba(20, 241, 149, 0.03) 0%, transparent 50%),
        linear-gradient(225deg, rgba(0, 212, 255, 0.02) 0%, transparent 50%);
    padding: 100px 16px;
    border-top: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.promote::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(20, 241, 149, 0.02) 0%, transparent 70%);
    pointer-events: none;
}

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

.promote-title {
    font-size: 52px;
    font-weight: 800;
    margin-bottom: 48px;
    letter-spacing: -1px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.promote-copy {
    margin-bottom: 64px;
}

.promote-intro {
    font-size: 32px;
    line-height: 1.3;
    margin-bottom: 32px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.accent-text {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
}

.promote-description {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.8;
    font-weight: 500;
}

.promote-description strong {
    color: var(--accent-primary);
    font-weight: 700;
}

.promote-scarcity {
    background: linear-gradient(135deg, 
        rgba(20, 241, 149, 0.1) 0%, 
        rgba(0, 212, 255, 0.05) 100%);
    border: 1.5px solid var(--border-light);
    border-left: 3px solid var(--error);
    padding: 24px 28px;
    border-radius: 8px;
    font-weight: 600;
    line-height: 1.8;
    position: relative;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 24px rgba(20, 241, 149, 0.05);
}

.scarcity-badge {
    display: inline-block;
    background-color: var(--error);
    color: #fff;
    font-size: 11px;
    font-weight: 900;
    padding: 4px 10px;
    border-radius: 4px;
    margin-bottom: 12px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.promote-scarcity p {
    color: var(--text-primary);
}

/* ============================================
   PRICING GRID
   ============================================ */

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 28px;
    margin-bottom: 72px;
}

.pricing-card {
    background: linear-gradient(135deg, var(--bg-card) 0%, #131313 100%);
    border: 1px solid var(--border);
    padding: 32px 28px;
    border-radius: 12px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.320, 1);
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.pricing-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.pricing-card:hover {
    border-color: var(--accent-primary);
    background: linear-gradient(135deg, rgba(20, 241, 149, 0.08) 0%, rgba(0, 212, 255, 0.04) 100%);
    transform: translateY(-8px);
    box-shadow: 
        0 12px 36px rgba(20, 241, 149, 0.15),
        inset 0 1px 0 rgba(20, 241, 149, 0.2);
}

.pricing-card:hover::before {
    opacity: 1;
}

.pricing-duration {
    font-size: 13px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 16px;
    font-weight: 700;
}

.pricing-price {
    font-size: 40px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.pricing-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    font-weight: 500;
}

/* ============================================
   TECHNICAL REQUIREMENTS
   ============================================ */

.requirements-section {
    background: linear-gradient(135deg, 
        rgba(20, 241, 149, 0.06) 0%, 
        rgba(0, 212, 255, 0.04) 100%);
    border: 1.5px solid var(--border-light);
    border-top: 2px solid var(--accent-primary);
    padding: 40px 32px;
    border-radius: 12px;
    margin-bottom: 64px;
    backdrop-filter: blur(10px);
}

.requirements-title {
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 32px;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 28px;
}

.requirement-card {
    background: rgba(15, 15, 15, 0.5);
    border: 1px solid var(--border);
    padding: 20px 16px;
    border-radius: 8px;
    text-align: center;
    transition: all 0.3s ease;
}

.requirement-card:hover {
    border-color: var(--accent-primary);
    background: rgba(20, 241, 149, 0.05);
    transform: translateY(-2px);
}

.requirement-label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
    font-weight: 700;
}

.requirement-value {
    font-size: 18px;
    font-weight: 800;
    color: var(--accent-primary);
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.requirement-note {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.5;
    font-weight: 500;
}

.requirements-note {
    font-size: 14px;
    color: var(--text-secondary);
    background: rgba(0, 212, 255, 0.08);
    border-left: 3px solid var(--accent-secondary);
    padding: 16px 16px;
    border-radius: 6px;
    line-height: 1.6;
    font-weight: 500;
}

.requirements-note strong {
    color: var(--text-primary);
}

/* ============================================
   CTA SECTION
   ============================================ */

.promote-cta {
    text-align: center;
}

.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-dark);
    font-size: 15px;
    font-weight: 800;
    padding: 18px 48px;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.4s ease;
    border: none;
    letter-spacing: 1px;
    text-transform: uppercase;
    cursor: pointer;
    box-shadow: 0 12px 32px rgba(20, 241, 149, 0.3);
    position: relative;
    overflow: hidden;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 48px rgba(20, 241, 149, 0.4);
}

.cta-button:hover::before {
    left: 100%;
}

.cta-subtext {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 20px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    background-color: var(--bg-darker);
    border-top: 1px solid var(--border);
    padding: 48px 16px;
    text-align: center;
}

.footer-disclaimer {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-weight: 500;
    letter-spacing: 0.3px;
}

.footer-copyright {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1400px) {
    .banner-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

@media (max-width: 1000px) {
    .banner-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 18px;
    }
    
    .promote-title {
        font-size: 40px;
    }
    
    .promote-intro {
        font-size: 24px;
    }

    .header-container {
        padding: 16px 24px;
        gap: 20px;
    }

    .nav {
        gap: 16px;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .banner-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;

    }

    .featured-banner {
        grid-column: 1 / -1;
        aspect-ratio: 16/7;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .promote {
        padding: 60px 24px;
    }

    .promote-intro {
        font-size: 20px;
    }

    .promote-title {
        font-size: 32px;
    }

    .header-container {
        flex-wrap: wrap;
        padding: 14px 20px;
    }

    .nav {
        gap: 12px;
        flex-wrap: wrap;
        width: 100%;
        order: 3;
    }

    .logo-wrapper {
        flex: 1;
        min-width: auto;
    }

    .requirements-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .requirements-section {
        padding: 28px 24px;
    }

    .hero {
        padding: 40px 24px;
    }

    .hero-title {
        font-size: 28px;
        margin-bottom: 12px;
    }

    .hero-subtitle {
        font-size: 14px;
        margin-bottom: 32px;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .stat {
        padding: 16px 12px;
    }

    .stat-value {
        font-size: 24px;
    }
}

@media (max-width: 480px) {
    .billboard {
        padding: 24px 16px;
    }

    .banner-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .featured-banner {
        grid-column: 1;
        aspect-ratio: 16/7;
    }
    
    .promote {
        padding: 40px 16px;
    }
    
    .promote-title {
        font-size: 28px;
        margin-bottom: 32px;
    }
    
    .promote-intro {
        font-size: 18px;
        margin-bottom: 20px;
    }

    .promote-description {
        font-size: 14px;
        margin-bottom: 20px;
    }

    .cta-button {
        width: 100%;
        padding: 16px 32px;
    }

    .nav {
        gap: 8px;
    }

    .logo {
        font-size: 13px;
    }

    .logo-tagline {
        font-size: 10px;
    }

    .nav-link {
        font-size: 12px;
    }

    .pricing-card {
        padding: 24px 20px;
    }

    .requirements-grid {
        grid-template-columns: 1fr;
    }

    .requirements-section {
        padding: 20px 16px;
        margin-bottom: 40px;
    }

    .requirements-title {
        font-size: 20px;
        margin-bottom: 20px;
    }

    .requirement-value {
        font-size: 16px;
    }

    .hero {
        padding: 32px 16px;
    }

    .hero-title {
        font-size: 22px;
        margin-bottom: 10px;
    }

    .hero-subtitle {
        font-size: 13px;
        margin-bottom: 24px;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
        max-width: 100%;
    }

    .stat {
        padding: 12px 10px;
    }

    .stat-value {
        font-size: 20px;
    }

    .stat-label {
        font-size: 10px;
    }
}