/* Modern Security Theme - SifrovanyTelefon.cz */

:root {
    --bg-main: #0b0f19;
    --bg-darker: #06080e;
    --bg-card: rgba(18, 24, 38, 0.7);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(0, 212, 255, 0.3);
    
    --primary: #00d4ff;
    --primary-hover: #00b4d8;
    --accent-emerald: #10b981;
    --accent-gold: #f59e0b;
    --accent-red: #ef4444;
    
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --text-dim: #6b7280;
    
    --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4 {
    color: #ffffff;
    font-weight: 700;
    line-height: 1.2;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

.gradient-text {
    background: linear-gradient(135deg, #00d4ff 0%, #3b82f6 50%, #10b981 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(11, 15, 25, 0.85);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    padding: 18px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-links a {
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 500;
}

.nav-links a:hover {
    color: #ffffff;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
}

.btn-primary {
    background: linear-gradient(135deg, #00d4ff 0%, #0077b6 100%);
    color: #040914;
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(0, 212, 255, 0.45);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: #ffffff;
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    background: var(--primary);
    color: #040914;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.05rem;
    border-radius: var(--radius-md);
}

.btn-block {
    width: 100%;
}

/* Hero Section */
.hero {
    position: relative;
    padding: 160px 0 100px;
    background: radial-gradient(circle at 50% 20%, rgba(0, 212, 255, 0.08) 0%, transparent 60%);
}

.hero-content {
    text-align: center;
    max-width: 900px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.25);
    border-radius: 30px;
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background-color: var(--accent-emerald);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent-emerald);
}

.hero-title {
    font-size: 3.2rem;
    letter-spacing: -1px;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 36px;
    max-width: 780px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta-group {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 60px;
}

/* Hero Metrics Grid */
.hero-metrics {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.metric-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    text-align: left;
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

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

.metric-icon {
    font-size: 1.8rem;
    margin-bottom: 8px;
}

.metric-title {
    font-weight: 700;
    font-size: 1rem;
    color: #ffffff;
}

.metric-desc {
    font-size: 0.825rem;
    color: var(--text-muted);
}

/* Section Styling */
.section {
    padding: 100px 0;
}

.bg-dark {
    background-color: var(--bg-darker);
}

.section-header {
    margin-bottom: 60px;
}

.section-header.center {
    text-align: center;
}

.section-subtitle {
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    color: var(--primary);
    display: block;
    margin-bottom: 10px;
}

.section-title {
    font-size: 2.3rem;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto;
}

/* Glass Cards */
.glass-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    backdrop-filter: blur(12px);
}

/* Architecture Grid & Diagram */
.architecture-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    align-items: center;
}

.bfu-diagram-card {
    border-color: rgba(0, 212, 255, 0.2);
}

.diagram-visual {
    margin-top: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.diagram-step {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.step-badge {
    align-self: flex-start;
    padding: 4px 10px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
}

.step-badge.bfu {
    background: rgba(16, 185, 129, 0.2);
    color: var(--accent-emerald);
    border: 1px solid var(--accent-emerald);
}

.step-badge.afu {
    background: rgba(245, 158, 11, 0.2);
    color: var(--accent-gold);
    border: 1px solid var(--accent-gold);
}

.step-badge.reboot {
    background: rgba(0, 212, 255, 0.2);
    color: var(--primary);
    border: 1px solid var(--primary);
}

.diagram-arrow {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-dim);
    font-family: var(--font-mono);
}

.arch-features {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.arch-item {
    display: flex;
    gap: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 24px;
    border-radius: var(--radius-md);
}

.arch-icon {
    font-size: 2rem;
}

.arch-item h4 {
    margin-bottom: 6px;
    font-size: 1.1rem;
}

.arch-item p {
    font-size: 0.925rem;
    color: var(--text-muted);
}

/* Configurator Grid */
.configurator-wrapper {
    padding: 40px;
}

.config-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 40px;
}

.config-group {
    margin-bottom: 32px;
}

.config-label {
    display: block;
    font-weight: 700;
    font-size: 1.05rem;
    margin-bottom: 14px;
    color: #ffffff;
}

.option-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
}

.option-cards.inline {
    grid-template-columns: repeat(3, 1fr);
}

.option-cards.vertical {
    grid-template-columns: 1fr;
}

.option-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    cursor: pointer;
    transition: var(--transition);
}

.option-card:hover {
    border-color: rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.06);
}

.option-card.active {
    border-color: var(--primary);
    background: rgba(0, 212, 255, 0.1);
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.15);
}

.opt-name {
    font-weight: 700;
    font-size: 0.95rem;
    color: #ffffff;
}

.opt-sub {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.opt-price {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--primary);
    margin-top: 8px;
}

.opt-title-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.badge-sm {
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 12px;
    background: rgba(0, 212, 255, 0.2);
    color: var(--primary);
}

.badge-sm.gold {
    background: rgba(245, 158, 11, 0.2);
    color: var(--accent-gold);
}

.badge-sm.red {
    background: rgba(239, 68, 68, 0.2);
    color: var(--accent-red);
}

/* Config Summary Box */
.config-summary-box {
    background: rgba(6, 8, 14, 0.9);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-md);
    padding: 28px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.divider {
    border: 0;
    border-top: 1px solid var(--border-color);
    margin: 18px 0;
}

.summary-details {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.sum-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.sum-row strong {
    color: #ffffff;
}

.price-display {
    margin-bottom: 24px;
}

.price-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: block;
}

.price-value {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--primary);
}

.price-note {
    font-size: 0.75rem;
    color: var(--text-dim);
}

/* Comparison Table */
.table-responsive {
    overflow-x: auto;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.comparison-table th, .comparison-table td {
    padding: 18px 24px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
    background: rgba(255, 255, 255, 0.04);
    font-size: 0.95rem;
    color: #ffffff;
}

.comparison-table th.highlight {
    background: rgba(0, 212, 255, 0.1);
    color: var(--primary);
}

.comparison-table th.highlight-extreme {
    background: rgba(239, 68, 68, 0.1);
    color: var(--accent-red);
}

.check { color: var(--accent-emerald); font-weight: 600; }
.check-plus { color: var(--primary); font-weight: 700; }
.cross { color: var(--text-dim); }
.warning { color: var(--accent-gold); }

/* Forms & Inputs */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: #ffffff;
}

.form-input {
    width: 100%;
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: #ffffff;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition);
}

.form-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.2);
}

/* Footer */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
    background: #04060b;
    font-size: 0.85rem;
    color: var(--text-dim);
}

.footer-disclaimer p {
    margin-bottom: 10px;
}

/* Threat Model Poradna */
.threat-model-container {
    padding: 30px;
}

.threat-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.threat-checkbox input {
    display: none;
}

.threat-content {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    height: 100%;
}

.threat-content:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
}

.threat-checkbox input:checked + .threat-content {
    background: rgba(16, 185, 129, 0.1);
    border-color: var(--accent-emerald);
    box-shadow: 0 0 15px rgba(16, 185, 129, 0.15);
}

.threat-icon {
    font-size: 1.8rem;
}

.threat-text {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.3;
}

.threat-text strong {
    display: block;
    color: #ffffff;
    font-size: 0.95rem;
    margin-bottom: 2px;
}

/* Pricing / Konzultace */
.pricing-card {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

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

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

@media (max-width: 992px) {
    .hero-title { font-size: 2.4rem; }
    .hero-metrics { grid-template-columns: repeat(2, 1fr); }
    .architecture-grid, .config-grid, .contact-wrapper, .grid-2, .grid-3 { grid-template-columns: 1fr; }
    .option-cards, .threat-grid { grid-template-columns: 1fr; }
    .option-cards.inline { grid-template-columns: 1fr; }
    .nav-links { display: none; }
}