/* =====================================================
   VPS.cz - Industrial Technical Luxury Theme
   ===================================================== */

:root {
    /* Colors */
    --bg-primary: #0a0e14;
    --bg-secondary: #12171f;
    --bg-tertiary: #1a2029;
    --bg-card: #151b24;
    --bg-card-hover: #1c232e;

    --accent-primary: #00d4ff;
    --accent-primary-dim: rgba(0, 212, 255, 0.15);
    --accent-primary-glow: rgba(0, 212, 255, 0.4);
    --accent-secondary: #ff6b35;
    --accent-green: #00ff88;
    --accent-orange: #ff9f43;

    --text-primary: #ffffff;
    --text-secondary: #8b95a5;
    --text-tertiary: #5a6475;

    --border-color: rgba(255, 255, 255, 0.08);
    --border-color-hover: rgba(255, 255, 255, 0.15);

    /* Typography */
    --font-display: 'Outfit', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Spacing */
    --section-padding: clamp(4rem, 8vw, 8rem);
    --container-max: 1200px;
    --container-padding: clamp(1.5rem, 4vw, 3rem);

    /* Animation */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

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

body {
    font-family: var(--font-display);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
}

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

img {
    max-width: 100%;
    height: auto;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Network Background */
.network-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.4;
}

#networkCanvas {
    width: 100%;
    height: 100%;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 14, 20, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0;
}

.logo-bracket {
    color: var(--text-tertiary);
    transition: color var(--transition-base);
}

.logo-text {
    color: var(--text-primary);
}

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

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

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

.nav-link.active::after,
.nav-link:hover::after {
    width: 100%;
}

.nav-link-login {
    color: var(--text-secondary);
}

.nav-btn {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.6rem 1.25rem;
    background: var(--accent-primary);
    color: var(--bg-primary);
    border-radius: 6px;
    transition: all var(--transition-fast);
}

.nav-btn:hover {
    background: #00e5ff;
    transform: translateY(-1px);
    box-shadow: 0 4px 20px var(--accent-primary-glow);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-base);
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(10, 14, 20, 0.98);
    backdrop-filter: blur(20px);
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    z-index: 999;
    flex-direction: column;
    gap: 0.5rem;
}

.mobile-menu.active {
    display: flex;
}

.mobile-link {
    display: block;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.mobile-link:hover,
.mobile-link.active {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.mobile-link.highlight {
    background: var(--accent-primary);
    color: var(--bg-primary);
    text-align: center;
    margin-top: 0.5rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    padding: 0.85rem 1.5rem;
    border-radius: 8px;
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

.btn-primary:hover {
    background: #00e5ff;
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-primary-glow);
}

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

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-primary);
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 4rem;
    padding: calc(72px + 4rem) var(--container-padding) 4rem;
    max-width: var(--container-max);
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--accent-primary-dim);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 50px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-primary);
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.6s ease;
}

.pulse {
    width: 8px;
    height: 8px;
    background: var(--accent-green);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

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

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.title-line {
    display: block;
    animation: fadeInUp 0.6s ease backwards;
}

.title-line:nth-child(1) { animation-delay: 0.1s; }
.title-line:nth-child(2) { animation-delay: 0.2s; }

.title-line.accent {
    color: var(--accent-primary);
    text-shadow: 0 0 60px var(--accent-primary-glow);
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 480px;
    margin-bottom: 2rem;
    animation: fadeInUp 0.6s ease 0.3s backwards;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease 0.4s backwards;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    animation: fadeInUp 0.6s ease 0.5s backwards;
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-primary);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-color);
}

/* Server Rack Visual */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeIn 1s ease 0.5s backwards;
}

.server-rack {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    box-shadow:
        0 0 0 1px rgba(0, 212, 255, 0.1),
        0 20px 50px rgba(0, 0, 0, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.rack-unit {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    min-width: 280px;
    transition: all var(--transition-base);
}

.rack-unit.active {
    border-color: rgba(0, 212, 255, 0.2);
}

.rack-unit.active:hover {
    border-color: rgba(0, 212, 255, 0.4);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.1);
}

.rack-leds {
    display: flex;
    gap: 6px;
}

.led {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-tertiary);
}

.led.green { background: var(--accent-green); box-shadow: 0 0 8px var(--accent-green); }
.led.blue { background: #3b82f6; box-shadow: 0 0 8px #3b82f6; }
.led.cyan { background: var(--accent-primary); box-shadow: 0 0 8px var(--accent-primary); }
.led.orange { background: var(--accent-orange); box-shadow: 0 0 8px var(--accent-orange); }

.led.blink { animation: blink 0.5s infinite; }
.led.blink-slow { animation: blink 2s infinite; }

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.rack-label {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    flex: 1;
}

.rack-activity {
    width: 60px;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
    position: relative;
}

.rack-activity::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
    animation: activity 2s infinite;
}

@keyframes activity {
    0% { left: -50%; }
    100% { left: 150%; }
}

/* Section Styles */
.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 4rem;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent-primary);
    padding: 0.35rem 0.75rem;
    background: var(--accent-primary-dim);
    border-radius: 4px;
    margin-bottom: 1rem;
    letter-spacing: 0.05em;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* Features Section */
.features {
    padding: var(--section-padding) 0;
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-color-hover);
    transform: translateY(-4px);
}

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

.feature-icon {
    width: 48px;
    height: 48px;
    color: var(--accent-primary);
    margin-bottom: 1.5rem;
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.feature-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    line-height: 1.6;
}

.feature-specs {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.spec {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.35rem 0.65rem;
    background: var(--bg-tertiary);
    border-radius: 4px;
    color: var(--text-secondary);
}

/* Plans Preview */
.plans-preview {
    padding: var(--section-padding) 0;
    background: var(--bg-secondary);
}

.plans-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.plan-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    transition: all var(--transition-base);
    position: relative;
}

.plan-card:hover {
    border-color: var(--border-color-hover);
    transform: translateY(-4px);
}

.plan-card.popular {
    border-color: var(--accent-primary);
    background: linear-gradient(180deg, rgba(0, 212, 255, 0.05) 0%, var(--bg-card) 100%);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.35rem 1rem;
    background: var(--accent-primary);
    color: var(--bg-primary);
    border-radius: 20px;
}

.plan-header {
    margin-bottom: 1.5rem;
}

.plan-name {
    display: block;
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.plan-badge {
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

.plan-price {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.price-value {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-primary);
}

.price-currency {
    font-size: 1rem;
    color: var(--text-tertiary);
    margin-left: 0.25rem;
}

.plan-features {
    list-style: none;
    margin-bottom: 2rem;
}

.plan-features li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.plan-features .check {
    color: var(--accent-green);
    font-weight: 600;
}

.plan-btn {
    display: block;
    width: 100%;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.85rem 1.5rem;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

.plan-btn:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
    border-color: var(--accent-primary);
}

.plan-card.popular .plan-btn {
    background: var(--accent-primary);
    color: var(--bg-primary);
    border-color: var(--accent-primary);
}

.plan-card.popular .plan-btn:hover {
    background: #00e5ff;
    box-shadow: 0 4px 20px var(--accent-primary-glow);
}

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

/* CTA Section */
.cta-section {
    padding: var(--section-padding) 0;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--accent-primary-dim) 0%, transparent 70%);
    pointer-events: none;
}

.cta-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-desc {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.cta-actions {
    margin-bottom: 1rem;
}

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

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 600;
    display: inline-flex;
    margin-bottom: 1rem;
}

.footer-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    max-width: 280px;
}

.footer-status {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-green);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.footer-links h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
}

.footer-links a {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    padding: 0.4rem 0;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

.footer-tech {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.footer-tech .separator {
    color: var(--text-tertiary);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

/* Responsive */
@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-visual {
        order: -1;
    }

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

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

    .plans-grid .plan-card:last-child {
        grid-column: 1 / -1;
        max-width: 400px;
        margin: 0 auto;
    }

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding-top: calc(72px + 2rem);
        min-height: auto;
    }

    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }

    .stat-divider {
        display: none;
    }

    .features-grid,
    .plans-grid {
        grid-template-columns: 1fr;
    }

    .plans-grid .plan-card:last-child {
        max-width: 100%;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

/* Utilities */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}