/* ==========================================================================
   SCANDINAVIAN RADIO OBSERVATORY - DESIGN SYSTEM (2026)
   ========================================================================== */

:root {
    /* Color Palette */
    --color-bg-main: #0a0d12;
    --color-bg-card: #121720;
    --color-bg-light: #f4f6f8;
    --color-text-main: #e1e7ec;
    --color-text-muted: #8b9bb0;
    --color-text-dark: #11161d;
    --color-border: #1e2633;
    
    /* Accent Colors */
    --color-cyan: #00d8d6;
    --color-cyan-glow: rgba(0, 216, 214, 0.15);
    --color-amber: #ff9f1a;
    --color-amber-glow: rgba(255, 159, 26, 0.2);

    /* Typography */
    --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-family-mono: "Courier New", Courier, monospace;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

/* Status Bar */
.status-bar {
    background: #05070a;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.75rem;
    font-family: var(--font-family-mono);
    padding: 6px 0;
    color: var(--color-text-muted);
}

.status-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    gap: 20px;
    align-items: center;
}

.led {
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    margin-right: 4px;
}

.led-amber { background-color: var(--color-amber); box-shadow: 0 0 6px var(--color-amber); }
.led-cyan { background-color: var(--color-cyan); box-shadow: 0 0 6px var(--color-cyan); }

/* Header & Nav */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: rgba(10, 13, 18, 0.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-logo {
    color: #fff;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.brand-symbol { color: var(--color-cyan); }
.brand-text small { display: block; font-size: 0.65rem; color: var(--color-text-muted); font-weight: 400; }

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 18px;
}

.main-nav a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color var(--transition-fast);
}

.main-nav a:hover {
    color: var(--color-cyan);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 4px;
}

.menu-toggle .bar {
    width: 22px;
    height: 2px;
    background-color: var(--color-text-main);
}

/* Layout Containers */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
    border-bottom: 1px solid var(--color-border);
}

.dark-bg {
    background-color: #0d1117;
}

.section-tag {
    font-family: var(--font-family-mono);
    font-size: 0.75rem;
    color: var(--color-cyan);
    letter-spacing: 1.5px;
    display: block;
    margin-bottom: 8px;
}

.section-header {
    margin-bottom: 40px;
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 600;
    color: #fff;
}

/* Hero Section */
.hero-section {
    position: relative;
    padding: 120px 20px 60px;
    background: radial-gradient(circle at 50% 20%, #151d2a 0%, #0a0d12 70%);
    text-align: center;
}

.hero-badge {
    display: inline-block;
    font-family: var(--font-family-mono);
    font-size: 0.75rem;
    padding: 4px 12px;
    border: 1px solid var(--color-border);
    border-radius: 20px;
    color: var(--color-amber);
    margin-bottom: 20px;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -1px;
    color: #fff;
    margin-bottom: 15px;
}

.hero-subtitle {
    max-width: 650px;
    margin: 0 auto 30px;
    color: var(--color-text-muted);
    font-size: 1.1rem;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
}

.btn {
    padding: 12px 24px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.btn-primary {
    background-color: var(--color-cyan);
    color: var(--color-text-dark);
}

.btn-primary:hover {
    background-color: #00b3b1;
}

.btn-secondary {
    border: 1px solid var(--color-border);
    color: var(--color-text-main);
}

.btn-secondary:hover {
    border-color: var(--color-cyan);
    color: var(--color-cyan);
}

/* Spectrum Visualization */
.spectrum-container {
    max-width: 1000px;
    margin: 0 auto;
    background: rgba(5, 7, 10, 0.8);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 15px;
}

.spectrum-labels {
    display: flex;
    justify-content: space-between;
    font-family: var(--font-family-mono);
    font-size: 0.7rem;
    color: var(--color-text-muted);
    margin-bottom: 5px;
}

canvas {
    width: 100%;
    display: block;
}

/* Grid & Cards */
.grid {
    display: grid;
    gap: 40px;
}

.grid-2 {
    grid-template-columns: 1fr 1fr;
    align-items: center;
}

.editorial-text p {
    margin-bottom: 18px;
    color: var(--color-text-main);
}

.editorial-media figure img {
    width: 100%;
    height: auto;
    border-radius: 6px;
    border: 1px solid var(--color-border);
}

.editorial-media figcaption {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-top: 8px;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.card {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    padding: 30px;
    border-radius: 6px;
}

.card-number {
    font-family: var(--font-family-mono);
    color: var(--color-amber);
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.card h3 {
    color: #fff;
    margin-bottom: 10px;
}

/* Feature List */
.feature-list {
    list-style: none;
    margin-top: 15px;
}

.feature-list li {
    margin-bottom: 12px;
    padding-left: 20px;
    position: relative;
}

.feature-list li::before {
    content: "▹";
    position: absolute;
    left: 0;
    color: var(--color-cyan);
}

/* Accordion */
.accordion-item {
    border: 1px solid var(--color-border);
    margin-bottom: 10px;
    border-radius: 4px;
    overflow: hidden;
}

.accordion-header {
    width: 100%;
    background-color: var(--color-bg-card);
    color: #fff;
    padding: 15px 20px;
    text-align: left;
    border: none;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.accordion-header::after {
    content: "+";
    color: var(--color-cyan);
}

.accordion-header.active::after {
    content: "−";
}

.accordion-content {
    padding: 20px;
    display: none;
    background-color: var(--color-bg-main);
    border-top: 1px solid var(--color-border);
}

.accordion-content.show {
    display: block;
}

/* Timeline */
.timeline {
    border-left: 2px solid var(--color-border);
    padding-left: 20px;
    margin-top: 20px;
}

.timeline-item {
    margin-bottom: 30px;
    position: relative;
}

.timeline-item::before {
    content: "";
    position: absolute;
    left: -26px;
    top: 5px;
    width: 10px;
    height: 10px;
    background-color: var(--color-cyan);
    border-radius: 50%;
}

.timeline-year {
    font-family: var(--font-family-mono);
    color: var(--color-amber);
    font-size: 0.85rem;
}

/* Log Mockup */
.log-mockup {
    background-color: #05070a;
    border: 1px solid var(--color-border);
    font-family: var(--font-family-mono);
    font-size: 0.8rem;
    border-radius: 6px;
    overflow-x: auto;
}

.log-header, .log-row {
    display: grid;
    grid-template-columns: 120px 80px 100px 180px 120px 1fr;
    padding: 12px 15px;
    border-bottom: 1px solid var(--color-border);
}

.log-header {
    background-color: #0c1017;
    color: var(--color-cyan);
    font-weight: bold;
}

.table-caption {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 10px;
}

/* Article Cards */
.article-card {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    overflow: hidden;
}

.article-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.article-content {
    padding: 20px;
}

.article-category {
    font-family: var(--font-family-mono);
    font-size: 0.7rem;
    color: var(--color-amber);
}

.article-card h3 {
    color: #fff;
    margin: 5px 0 10px;
    font-size: 1.1rem;
}

.article-link {
    color: var(--color-cyan);
    text-decoration: none;
    font-size: 0.85rem;
    display: inline-block;
    margin-top: 10px;
}

/* Steps Wrapper */
.steps-wrapper {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.step-item {
    display: flex;
    gap: 20px;
    background-color: var(--color-bg-card);
    padding: 20px;
    border-radius: 6px;
    border: 1px solid var(--color-border);
}

.step-number {
    font-family: var(--font-family-mono);
    font-size: 1.5rem;
    color: var(--color-cyan);
    font-weight: bold;
}

/* Gallery Grid */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.gallery-grid img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 4px;
    border: 1px solid var(--color-border);
}

/* Footer */
.site-footer {
    background-color: #05070a;
    padding: 60px 0 20px;
    border-top: 1px solid var(--color-border);
    font-size: 0.85rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3 {
    color: #fff;
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 8px;
}

.footer-col a {
    color: var(--color-text-muted);
    text-decoration: none;
}

.footer-col a:hover {
    color: var(--color-cyan);
}

.footer-bottom {
    text-align: center;
    color: var(--color-text-muted);
    border-top: 1px solid var(--color-border);
    padding-top: 20px;
}

.max-w-prose {
    max-width: 75ch;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .grid-2 {
        grid-template-columns: 1fr;
    }
    
    .menu-toggle {
        display: flex;
    }

    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--color-bg-main);
        border-bottom: 1px solid var(--color-border);
        padding: 20px;
    }

    .main-nav.show {
        display: block;
    }

    .main-nav ul {
        flex-direction: column;
        gap: 15px;
    }

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