/* ===== IMPROVED STYLES FOR 5gb.COM ===== */

/* Custom Properties - Distinctive Color Palette */
:root {
    /* Primary Colors - Tech-noir inspired */
    --primary-cyan: #00f5ff;
    --primary-purple: #8b5cf6;
    --accent-pink: #ff1b8d;
    --accent-gold: #ffd700;

    /* Background Gradient */
    --bg-start: #0a0618;
    --bg-mid: #1a0b2e;
    --bg-end: #0f1729;

    /* Text Colors */
    --text-primary: #f8fafc;
    --text-secondary: #a5b4fc;
    --text-muted: #6b7280;

    /* Glass Morphism */
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);

    /* Typography */
    --font-display: 'Space Grotesk', 'Orbitron', sans-serif;
    --font-body: 'Inter', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    line-height: 1.7;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--bg-start) 0%, var(--bg-mid) 50%, var(--bg-end) 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Animated Background Grid */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        linear-gradient(rgba(139, 92, 246, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(139, 92, 246, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
    pointer-events: none;
    z-index: -1;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.container {
    width: 92%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

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

.section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-cyan) 0%, var(--primary-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-cyan), var(--accent-pink));
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    font-weight: 300;
}

/* ===== HEADER & NAVIGATION ===== */
header {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

header.scrolled {
    background: rgba(10, 6, 24, 0.95);
    box-shadow: 0 4px 40px rgba(0, 245, 255, 0.15);
}

.navbar {
    padding: 1.5rem 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.logo {
    position: relative;
}

.logo h2 {
    font-size: 1.75rem;
    font-weight: 700;
    font-family: var(--font-display);
}

.logo .accent {
    color: var(--primary-cyan);
    position: relative;
    display: inline-block;
}

.logo .accent::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-cyan), var(--accent-pink));
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 0;
}

.nav-menu a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-cyan), var(--accent-pink));
    transition: width 0.3s ease;
}

.nav-menu a:hover {
    color: var(--text-primary);
}

.nav-menu a:hover::before {
    width: 100%;
}

/* ===== BUTTONS ===== */
.btn {
    padding: 0.875rem 2rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    border: none;
    font-family: var(--font-body);
    position: relative;
    overflow: hidden;
}

.btn::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;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-cyan) 0%, var(--primary-purple) 100%);
    color: white;
    box-shadow: 0 4px 20px rgba(0, 245, 255, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 40px rgba(0, 245, 255, 0.6);
}

.btn-secondary {
    background: var(--glass-bg);
    color: var(--primary-cyan);
    border: 2px solid var(--primary-cyan);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: var(--primary-cyan);
    color: var(--bg-start);
    transform: translateY(-3px);
}

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
}

/* ===== HERO SECTION ===== */
.hero {
    padding: 180px 0 120px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
    animation: pulse 8s ease-in-out infinite;
    pointer-events: none;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.2); opacity: 0.8; }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
}

.promo-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: linear-gradient(135deg, rgba(0, 245, 255, 0.2), rgba(139, 92, 246, 0.2));
    color: var(--primary-cyan);
    padding: 1rem 2rem;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 2rem;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    animation: gentle-breathe 4s ease-in-out infinite;
}

@keyframes gentle-breathe {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-3px) scale(1.01); }
}

.hero-content h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.hero-content p {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 300;
}

/* Value Props with enhanced styling */
.value-props {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 3rem 0;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.value-prop {
    background: var(--glass-bg);
    padding: 1.5rem;
    border-radius: 16px;
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.4s ease;
}

.value-prop:hover {
    transform: translateY(-5px);
    border-color: var(--primary-cyan);
    box-shadow: 0 10px 40px rgba(0, 245, 255, 0.2);
}

.value-prop i {
    font-size: 1.75rem;
    color: var(--accent-gold);
    flex-shrink: 0;
}

.value-prop span {
    font-weight: 500;
    font-size: 0.95rem;
}

.hero-btns {
    margin-top: 3rem;
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Hero LLM Logos */
.hero-llm-logos {
    display: flex;
    gap: 2rem;
    justify-content: center;
    align-items: center;
    margin: 4rem 0;
    flex-wrap: wrap;
}

.hero-llm-logos img {
    width: 64px;
    height: 64px;
    object-fit: contain;
    filter: brightness(1.1) contrast(1.2);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    animation: fadeIn 0.5s ease-out backwards;
}

.hero-llm-logos img:nth-child(1) { animation-delay: 0.1s; }
.hero-llm-logos img:nth-child(2) { animation-delay: 0.2s; }
.hero-llm-logos img:nth-child(3) { animation-delay: 0.3s; }
.hero-llm-logos img:nth-child(4) { animation-delay: 0.4s; }
.hero-llm-logos img:nth-child(5) { animation-delay: 0.5s; }

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-llm-logos img:hover {
    transform: scale(1.2) rotate(5deg);
    filter: brightness(1.5) contrast(1.3);
}

/* ===== FEATURES SECTION ===== */
.features {
    padding: 120px 0;
    background: linear-gradient(to bottom, transparent 0%, rgba(139, 92, 246, 0.05) 100%);
    position: relative;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.feature-card {
    background: var(--glass-bg);
    padding: 3rem 2.5rem;
    border-radius: 24px;
    text-align: center;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 245, 255, 0.1), rgba(139, 92, 246, 0.1));
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.feature-card:hover {
    transform: translateY(-15px);
    border-color: var(--primary-cyan);
    box-shadow: 0 20px 60px rgba(0, 245, 255, 0.3);
}

.feature-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
}

.feature-card h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

/* ===== PRICING SECTION ===== */
.pricing {
    padding: 120px 0;
    background: linear-gradient(to bottom, rgba(10, 6, 24, 0.5) 0%, rgba(26, 11, 46, 0.3) 100%);
    position: relative;
}

.pricing-header {
    text-align: center;
    margin-bottom: 4rem;
}

.promo-banner {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    background: linear-gradient(135deg, var(--primary-cyan), var(--primary-purple));
    color: white;
    padding: 1.25rem 2.5rem;
    border-radius: 50px;
    font-size: 1.125rem;
    font-weight: 600;
    margin-top: 2rem;
    box-shadow: 0 8px 30px rgba(0, 245, 255, 0.4);
    animation: glow 2s ease-in-out infinite;
}

@keyframes glow {
    0%, 100% { box-shadow: 0 8px 30px rgba(0, 245, 255, 0.4); }
    50% { box-shadow: 0 8px 50px rgba(0, 245, 255, 0.7); }
}

/* Pricing Toggle */
.pricing-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin: 3rem 0;
}

.toggle-label {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.toggle-label.active {
    color: var(--primary-cyan);
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 70px;
    height: 35px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--glass-bg);
    border: 2px solid var(--primary-cyan);
    transition: 0.4s;
    border-radius: 35px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 25px;
    width: 25px;
    left: 4px;
    bottom: 3px;
    background-color: white;
    transition: 0.4s;
    border-radius: 50%;
}

input:checked + .toggle-slider {
    background: linear-gradient(135deg, var(--primary-cyan), var(--primary-purple));
}

input:checked + .toggle-slider:before {
    transform: translateX(35px);
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
    margin-top: 4rem;
}

.pricing-card {
    background: var(--glass-bg);
    border-radius: 24px;
    padding: 3rem 2.5rem;
    text-align: center;
    border: 2px solid var(--glass-border);
    backdrop-filter: blur(20px);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.pricing-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-cyan), var(--accent-pink), var(--primary-purple));
    background-size: 200% 100%;
    animation: gradientShift 3s linear infinite;
}

@keyframes gradientShift {
    0% { background-position: 0% 100%; }
    100% { background-position: 200% 100%; }
}

.pricing-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-cyan);
    box-shadow: 0 20px 60px rgba(0, 245, 255, 0.4);
}

.pricing-card.professional {
    border: 2px solid var(--primary-cyan);
    transform: scale(1.05);
}

.pricing-card.professional::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 245, 255, 0.1), rgba(139, 92, 246, 0.1));
    pointer-events: none;
}

.recommended-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: linear-gradient(135deg, var(--primary-cyan), var(--primary-purple));
    color: white;
    padding: 0.5rem 1.25rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 4px 15px rgba(0, 245, 255, 0.4);
}

.config-badge {
    position: absolute;
    top: 20px;
    left: 20px;
    background: linear-gradient(135deg, var(--primary-purple), var(--accent-pink));
    color: white;
    padding: 0.5rem 1.25rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.4);
}

.pricing-header h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.5rem;
    margin: 2rem 0;
}

.original-price {
    font-size: 1.75rem;
    color: var(--text-muted);
    text-decoration: line-through;
}

.price-main {
    font-size: 5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-cyan), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-family: var(--font-display);
}

.price-period {
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.price-detail {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: 2rem;
}

.pricing-body ul {
    list-style: none;
    margin: 2.5rem 0;
    text-align: left;
}

.pricing-body ul li {
    margin: 1.25rem 0;
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1rem;
}

.pricing-body ul li i {
    color: var(--primary-cyan);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.pricing-value {
    background: linear-gradient(135deg, rgba(0, 245, 255, 0.1), rgba(139, 92, 246, 0.1));
    padding: 1.5rem;
    border-radius: 12px;
    margin: 2rem 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    font-weight: 600;
    color: var(--primary-cyan);
    border: 1px solid rgba(0, 245, 255, 0.2);
}

.pricing-value i {
    font-size: 1.5rem;
}

/* ===== PRIVACY SECTION ===== */
.privacy {
    padding: 120px 0;
    background: linear-gradient(to bottom, rgba(15, 23, 41, 0.3) 0%, rgba(26, 11, 46, 0.2) 100%);
}

.privacy-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-top: 4rem;
    align-items: center;
}

.privacy-graphic {
    background: var(--glass-bg);
    padding: 3rem;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    text-align: center;
}

.shield {
    font-size: 6rem;
    background: linear-gradient(135deg, var(--primary-cyan), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 2rem;
    animation: pulse 2s ease-in-out infinite;
}

.data-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin: 2.5rem 0;
    flex-wrap: wrap;
}

.data-item {
    background: rgba(10, 6, 24, 0.8);
    padding: 1.5rem;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    min-width: 140px;
    border: 1px solid var(--glass-border);
    transition: all 0.3s ease;
}

.data-item:hover {
    border-color: var(--primary-cyan);
    transform: translateY(-5px);
}

.data-item i {
    font-size: 2rem;
    color: var(--primary-cyan);
}

.data-item span {
    font-size: 0.95rem;
    font-weight: 600;
}

.arrow-1, .arrow-2 {
    color: var(--primary-cyan);
    font-size: 1.75rem;
    animation: slideRight 2s ease-in-out infinite;
}

@keyframes slideRight {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(10px); }
}

.crossed-out {
    display: flex;
    align-items: center;
    gap: 1rem;
    justify-content: center;
    margin: 1.5rem 0;
    color: #dc3545;
    font-weight: 600;
}

.crossed-out i {
    font-size: 1.5rem;
}

.privacy-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.privacy-card {
    background: var(--glass-bg);
    padding: 2.5rem;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    transition: all 0.4s ease;
}

.privacy-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-cyan);
    box-shadow: 0 15px 50px rgba(0, 245, 255, 0.25);
}

.privacy-icon {
    font-size: 3rem;
    background: linear-gradient(135deg, var(--primary-cyan), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1.5rem;
}

.privacy-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.privacy-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.privacy-card ul {
    list-style: none;
    padding: 0;
}

.privacy-card ul li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    color: var(--text-secondary);
}

.privacy-card ul li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-cyan);
    font-weight: bold;
}

.privacy-comparison {
    margin-top: 6rem;
    background: var(--glass-bg);
    padding: 4rem;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
}

.privacy-comparison h3 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
}

.privacy-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.privacy-table thead {
    background: linear-gradient(135deg, var(--primary-cyan), var(--primary-purple));
}

.privacy-table th {
    padding: 1.5rem;
    text-align: left;
    font-weight: 600;
    font-size: 1.125rem;
}

.privacy-table td {
    padding: 1.5rem;
    border-bottom: 1px solid var(--glass-border);
}

.privacy-table tr {
    transition: background 0.3s ease;
}

.privacy-table tr:hover {
    background: rgba(139, 92, 246, 0.1);
}

.privacy-table td.check {
    color: var(--primary-cyan);
    font-weight: 600;
}

.privacy-table td.cross {
    color: #dc3545;
    font-weight: 600;
}

.privacy-table td.partial {
    color: var(--accent-gold);
    font-weight: 600;
}

/* ===== WHITE PAPERS SECTION ===== */
.whitepapers {
    padding: 120px 0;
    background: linear-gradient(to bottom, rgba(26, 11, 46, 0.2) 0%, transparent 100%);
}

.llm-showcase {
    margin: 4rem 0;
    padding: 4rem;
    background: var(--glass-bg);
    border-radius: 32px;
    border: 2px solid var(--glass-border);
    backdrop-filter: blur(20px);
    box-shadow: 0 20px 80px rgba(139, 92, 246, 0.3);
}

.llm-showcase h3 {
    text-align: center;
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 1rem;
}

.llm-showcase-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.25rem;
    margin-bottom: 3rem;
}

.llm-logos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.llm-logo-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    background: rgba(10, 6, 24, 0.6);
    border-radius: 20px;
    border: 2px solid var(--glass-border);
    backdrop-filter: blur(20px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.llm-logo-item:hover {
    transform: translateY(-10px) rotate(2deg);
    border-color: var(--primary-cyan);
    box-shadow: 0 15px 50px rgba(0, 245, 255, 0.4);
}

.llm-logo-item img {
    width: 72px;
    height: 72px;
    object-fit: contain;
    filter: drop-shadow(0 4px 10px rgba(0, 245, 255, 0.3));
}

.llm-logo-item span {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
}

.whitepapers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
    margin-top: 4rem;
}

.whitepaper-card {
    background: var(--glass-bg);
    border-radius: 24px;
    padding: 3rem;
    border: 2px solid var(--glass-border);
    backdrop-filter: blur(20px);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.whitepaper-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-cyan), var(--primary-purple), var(--accent-pink));
    background-size: 200% 100%;
    animation: gradientShift 4s linear infinite;
}

.whitepaper-card:hover {
    transform: translateY(-15px);
    border-color: var(--primary-cyan);
    box-shadow: 0 25px 80px rgba(0, 245, 255, 0.4);
}

.whitepaper-card.featured {
    border: 2px solid var(--accent-gold);
}

.featured-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-pink));
    color: var(--bg-start);
    padding: 0.5rem 1.25rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 4px 20px rgba(255, 215, 0, 0.4);
}

.whitepaper-icon {
    font-size: 4rem;
    background: linear-gradient(135deg, var(--primary-cyan), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1.5rem;
}

.whitepaper-card h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.whitepaper-card > p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
    font-size: 1.125rem;
}

.whitepaper-topics {
    list-style: none;
    padding: 0;
    margin: 2rem 0;
}

.whitepaper-topics li {
    padding: 1rem 0;
    padding-left: 2rem;
    position: relative;
    color: var(--text-secondary);
    font-size: 1rem;
}

.whitepaper-topics li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary-cyan);
    font-weight: bold;
    font-size: 1.25rem;
}

.whitepaper-meta {
    display: flex;
    gap: 2rem;
    margin: 2rem 0;
    padding: 1.5rem;
    background: rgba(10, 6, 24, 0.6);
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.whitepaper-meta span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.whitepaper-meta i {
    color: var(--primary-cyan);
    font-size: 1.25rem;
}

.whitepapers-cta {
    background: var(--glass-bg);
    padding: 4rem;
    border-radius: 24px;
    text-align: center;
    margin-top: 5rem;
    border: 2px solid var(--glass-border);
    backdrop-filter: blur(20px);
}

.whitepapers-cta h3 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.whitepapers-cta p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== USE CASES ===== */
.use-cases {
    margin: 6rem 0;
}

.use-cases h3 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.use-case {
    background: var(--glass-bg);
    padding: 3rem 2.5rem;
    border-radius: 20px;
    text-align: center;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.use-case:hover {
    transform: translateY(-10px);
    border-color: var(--primary-cyan);
    box-shadow: 0 15px 50px rgba(0, 245, 255, 0.3);
}

.use-case i {
    font-size: 4rem;
    background: linear-gradient(135deg, var(--primary-cyan), var(--primary-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1.5rem;
}

.use-case h4 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.use-case p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 1.125rem;
}

/* ===== TECH SPECS ===== */
.tech-specs {
    margin: 6rem 0;
}

.tech-specs h3 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.spec-item {
    background: var(--glass-bg);
    padding: 3rem 2.5rem;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    transition: all 0.4s ease;
}

.spec-item:hover {
    transform: translateY(-8px);
    border-color: var(--primary-cyan);
    box-shadow: 0 15px 50px rgba(0, 245, 255, 0.25);
}

.spec-item i {
    font-size: 3.5rem;
    background: linear-gradient(135deg, var(--primary-cyan), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1.5rem;
}

.spec-item h4 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.spec-item ul {
    list-style: none;
    padding: 0;
}

.spec-item ul li {
    padding: 0.875rem 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 2rem;
    font-size: 1rem;
}

.spec-item ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-cyan);
    font-weight: bold;
    font-size: 1.25rem;
}

/* ===== PRICING COMPARISON ===== */
.pricing-comparison {
    margin-top: 6rem;
    background: var(--glass-bg);
    padding: 4rem;
    border-radius: 24px;
    border: 2px solid var(--glass-border);
    backdrop-filter: blur(20px);
}

.pricing-comparison h3 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.cost-comparison {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
}

.cost-item {
    background: rgba(10, 6, 24, 0.6);
    padding: 3rem;
    border-radius: 20px;
    border-left: 4px solid var(--primary-cyan);
    transition: all 0.3s ease;
}

.cost-item:hover {
    border-left-width: 8px;
    box-shadow: 0 10px 40px rgba(0, 245, 255, 0.2);
}

.cost-item h4 {
    font-size: 1.75rem;
    margin-bottom: 2rem;
    color: var(--primary-cyan);
}

.cost-row {
    display: flex;
    justify-content: space-between;
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--glass-border);
    font-size: 1.125rem;
}

.cost-row:last-child {
    border-bottom: none;
    margin-top: 1rem;
    padding-top: 1.25rem;
    border-top: 2px solid var(--primary-cyan);
    font-weight: 700;
}

.cost-row strong {
    color: var(--primary-cyan);
    font-size: 1.25rem;
}

/* ===== API INTEGRATION SECTION ===== */
.api-integration {
    padding: 120px 0;
}

.api-integration-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.api-integration h2 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.api-integration p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.api-integration-card {
    background: var(--glass-bg);
    padding: 2.5rem;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    margin-bottom: 2rem;
    transition: all 0.4s ease;
}

.api-integration-card:hover {
    border-color: var(--primary-cyan);
    transform: translateX(10px);
}

.api-integration-card h3 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    color: var(--primary-cyan);
}

.api-integration-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.api-integration-card ul {
    list-style: none;
    padding: 0;
}

.api-integration-card ul li {
    padding: 0.875rem 0;
    padding-left: 2rem;
    position: relative;
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.api-integration-card ul li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-cyan);
    font-weight: bold;
}

/* ===== SUPPORT SECTION ===== */
.support {
    padding: 120px 0;
    background: linear-gradient(to bottom, transparent 0%, rgba(10, 6, 24, 0.3) 100%);
}

.faq-section {
    margin-bottom: 4rem;
}

.faq-item {
    margin-bottom: 1.5rem;
    background: var(--glass-bg);
    border-radius: 16px;
    padding: 2rem;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    transition: all 0.4s ease;
    cursor: pointer;
}

.faq-item:hover {
    border-color: var(--primary-cyan);
    box-shadow: 0 8px 30px rgba(0, 245, 255, 0.2);
}

.faq-item h3 {
    margin-bottom: 1rem;
    color: var(--primary-cyan);
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.faq-item p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1.125rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.3s ease;
    opacity: 0;
}

.faq-item.active p {
    max-height: 500px;
    opacity: 1;
    margin-top: 1rem;
}

.faq-item h3::after {
    content: '+';
    font-size: 1.75rem;
    transition: transform 0.3s ease;
}

.faq-item.active h3::after {
    transform: rotate(45deg);
}

.support-ticket {
    background: var(--glass-bg);
    padding: 4rem;
    border-radius: 24px;
    text-align: center;
    border: 2px solid var(--glass-border);
    backdrop-filter: blur(20px);
    box-shadow: 0 20px 80px rgba(139, 92, 246, 0.2);
}

.support-ticket h3 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.support-ticket p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
}

/* ===== ABOUT SECTION ===== */
.about {
    padding: 120px 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h3 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

.about-text p {
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ===== CONTACT SECTION ===== */
.contact {
    padding: 120px 0;
    background: linear-gradient(to bottom, rgba(26, 11, 46, 0.2) 0%, transparent 100%);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info h3 {
    font-size: 2rem;
    margin-bottom: 2.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 2rem;
}

.contact-item i {
    font-size: 2rem;
    color: var(--primary-cyan);
    margin-right: 1.5rem;
    width: 50px;
    text-align: center;
}

.contact-item p {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

.contact-form {
    display: flex;
    flex-direction: column;
}

.contact-form input,
.contact-form textarea,
.contact-form select {
    padding: 1.25rem;
    margin-bottom: 1.5rem;
    border: 2px solid var(--glass-border);
    background: var(--glass-bg);
    color: var(--text-primary);
    border-radius: 12px;
    font-family: var(--font-body);
    font-size: 1.125rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
    outline: none;
    border-color: var(--primary-cyan);
    box-shadow: 0 0 0 4px rgba(0, 245, 255, 0.1);
}

.contact-form textarea {
    resize: vertical;
    min-height: 180px;
}

/* ===== FOOTER ===== */
footer {
    background: rgba(10, 6, 24, 0.95);
    color: white;
    padding: 5rem 0 2rem;
    border-top: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    font-family: var(--font-display);
}

.footer-logo .accent {
    color: var(--primary-cyan);
}

.footer-logo p {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 1.125rem;
    transition: all 0.3s ease;
    position: relative;
    padding-left: 1.5rem;
}

.footer-links a::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-cyan);
    transition: transform 0.3s ease;
}

.footer-links a:hover {
    color: var(--text-primary);
    padding-left: 2rem;
}

.footer-links a:hover::before {
    transform: translateX(5px);
}

.footer-social {
    display: flex;
    gap: 1.5rem;
}

.footer-social a {
    color: var(--text-secondary);
    font-size: 2rem;
    transition: all 0.4s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
}

.footer-social a:hover {
    color: var(--primary-cyan);
    transform: translateY(-5px) scale(1.1);
    border-color: var(--primary-cyan);
    box-shadow: 0 10px 30px rgba(0, 245, 255, 0.3);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
    color: var(--text-secondary);
    font-size: 1.125rem;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
    .nav-menu {
        display: none;
    }

    .pricing-card.professional {
        transform: scale(1);
    }

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

    .hero-llm-logos {
        gap: 1.5rem;
    }

    .hero-llm-logos img {
        width: 56px;
        height: 56px;
    }
}

@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }

    .hero-content p {
        font-size: 1.25rem;
    }

    .value-props {
        grid-template-columns: 1fr;
    }

    .hero-btns {
        flex-direction: column;
    }

    .hero-btns .btn {
        width: 100%;
    }

    .section-title {
        font-size: 2rem;
    }

    .about-content,
    .contact-content,
    .api-integration-content,
    .privacy-content {
        grid-template-columns: 1fr;
    }

    .privacy-details {
        grid-template-columns: 1fr;
    }

    .pricing-toggle {
        flex-direction: column;
        gap: 1rem;
    }

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

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

    .llm-logo-item img {
        width: 56px;
        height: 56px;
    }
}

@media (max-width: 480px) {
    .container {
        width: 95%;
    }

    .hero {
        padding: 140px 0 80px;
    }

    .promo-badge {
        font-size: 0.875rem;
        padding: 0.875rem 1.5rem;
    }

    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.95rem;
    }

    .btn-large {
        padding: 1rem 2rem;
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .llm-logos-grid {
        grid-template-columns: 1fr;
    }

    .footer-social {
        justify-content: center;
    }
}

/* ===== LOADING ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out forwards;
}

/* ===== UTILITY CLASSES ===== */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-cyan), var(--primary-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glow {
    animation: glow 2s ease-in-out infinite;
}