/*
 * SIGNALBORN SHARED STYLES
 * The spine - one change updates the whole site
 * Constraint: single-column, two fonts, cyan used only as punctuation
 */

:root {
    /* Palette */
    --void-black: #050607;
    --deep-charcoal: #0e1113;
    --mycelial-cyan: #7fdde7;
    --ash-white: #e6eef0;
    --soil-gold: #c8b27c;

    /* Typography */
    --font-body: 'Source Serif 4', serif;
    --font-signal: 'JetBrains Mono', monospace;

    /* Dimensions */
    --max-width: 640px;
    --spacing-unit: 2rem;
}

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

body {
    background-color: var(--void-black);
    color: var(--ash-white);
    font-family: var(--font-body);
    line-height: 1.6;
    font-weight: 300;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: 12vh;
    opacity: 0;
    animation: fade-in 1.5s ease-out forwards;
    padding-bottom: 2rem;
}

/* Layout Container */
.signal-container {
    width: 100%;
    max-width: var(--max-width);
    padding: 0 1.5rem;
}

/* Page Header */
.page-head {
    margin-bottom: 3rem;
}

.page-head h1 {
    font-family: var(--font-signal);
    font-size: 1rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin: 1.25rem 0 0.75rem 0;
}

.subline {
    font-family: var(--font-signal);
    font-size: 0.8rem;
    color: var(--mycelial-cyan);
    opacity: 0.85;
}

/* Back Link - Quiet Navigation */
.back-link {
    font-family: var(--font-signal);
    font-size: 0.8rem;
    color: #8b9bab;
    text-decoration: none;
    border-bottom: 1px solid var(--deep-charcoal);
    padding-bottom: 2px;
    transition: border-color 0.4s ease, color 0.4s ease;
}

.back-link:hover {
    color: var(--mycelial-cyan);
    border-color: var(--mycelial-cyan);
}

/* Navigation Footer */
.nav-footer {
    margin-top: 5rem;
    text-align: center;
    font-family: var(--font-signal);
    font-size: 0.85rem;
}

.nav-footer a {
    color: var(--ash-white);
    text-decoration: none;
    border-bottom: 1px solid var(--deep-charcoal);
    padding-bottom: 2px;
    transition: border-color 0.4s ease, color 0.4s ease;
}

.nav-footer a:hover {
    border-color: var(--mycelial-cyan);
    color: var(--mycelial-cyan);
}

/* Animations */
@keyframes fade-in {
    0% { opacity: 0; transform: translateY(15px); }
    100% { opacity: 1; transform: translateY(0); }
}