/*
 * Yurt Tech — Site-wide Styles
 * Shared by all pages. Loaded before any page-specific stylesheet.
 * Design language: austere technical / lab notebook / TUI terminal.
 */

/* ==================== CSS VARIABLES ==================== */
:root {
    --bg:         #000000;
    --fg:         #d4d4d4;
    --fg-dim:     #888888;
    --accent:     #00ff00;
    --accent-dim: #007700;
    --border:     #333333;
    --border-hi:  #00ff00;
    --font-mono:  'Perfect DOS VGA 437', 'Courier New', monospace;
    --font-serif: Georgia, 'Times New Roman', serif;
    --nav-height: 44px;
}

/* ==================== BASE ==================== */
*, *::before, *::after {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: var(--font-mono);
}

/* Pages with the fixed navbar need top clearance */
body.has-nav {
    padding-top: var(--nav-height);
}

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

a:hover {
    color: #ffffff;
    text-decoration: underline;
}

/* ==================== NAVBAR ==================== */
.site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    background: rgba(0, 0, 0, 0.92);
    border-bottom: 1px solid var(--accent-dim);
    display: flex;
    align-items: center;
    padding: 0 1.25rem;
    gap: 0.25rem;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.nav-brand {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--accent);
    letter-spacing: 0.12em;
    margin-right: 0.75rem;
    white-space: nowrap;
    flex-shrink: 0;
}

.site-nav a {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--fg-dim);
    text-decoration: none;
    letter-spacing: 0.08em;
    padding: 0.2rem 0.55rem;
    border: 1px solid transparent;
    transition: color 0.1s, border-color 0.1s;
    white-space: nowrap;
    flex-shrink: 0;
}

.site-nav a:hover {
    color: var(--fg);
    text-decoration: none;
    border-color: var(--border);
}

.site-nav a.active {
    color: var(--accent);
    border-color: var(--accent-dim);
}

/* ==================== MOBILE NAV ==================== */
@media only screen and (max-width: 680px) {
    .site-nav {
        padding: 0 0.5rem;
        overflow-x: auto;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }
    .site-nav::-webkit-scrollbar {
        display: none;
    }
    .nav-brand {
        display: none;
    }
    .site-nav a {
        font-size: 0.7rem;
        padding: 0.2rem 0.4rem;
    }
}

/* ==================== HOME PAGE ==================== */
#home-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    display: block;
}

.grain-overlay {
    position: fixed;
    top: -100%;
    left: -50%;
    width: 300%;
    height: 300%;
    z-index: 2;
    pointer-events: none;
    opacity: 0.15;
    filter: url('#grain-filter');
    animation: grain-flicker 8s steps(10) infinite;
}

@keyframes grain-flicker {
  0%, 100% { transform:translate(0, 0) }
  10% { transform:translate(-5%, -10%) }
  20% { transform:translate(-15%, 5%) }
  30% { transform:translate(7%, -25%) }
  40% { transform:translate(-5%, 25%) }
  50% { transform:translate(-15%, 10%) }
  60% { transform:translate(15%, 0%) }
  70% { transform:translate(0%, 15%) }
  80% { transform:translate(3%, 35%) }
  90% { transform:translate(-10%, 10%) }
}

.home-logo-wrap {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1;
    pointer-events: none;
    text-align: center;
}

.home-logo {
    width: 280px;
    max-width: 55vw;
    height: auto;
    filter: drop-shadow(0 0 20px rgba(0, 0, 0, 0.9));
}

/* ==================== PAGE LAYOUT ==================== */
.page-wrapper {
    max-width: 960px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.page-title {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--accent);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.5rem;
    margin: 0 0 2rem 0;
}

/* ==================== ENTRY CARDS (shared by Worlds & Tools) ==================== */
.entry-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.entry-card {
    border: 1px solid var(--border);
    padding: 1.25rem;
    transition: border-color 0.1s;
}

.entry-card:hover {
    border-color: var(--accent-dim);
}

.entry-title {
    font-family: var(--font-mono);
    font-size: 0.92rem;
    color: var(--fg);
    margin: 0 0 0.4rem 0;
    letter-spacing: 0.05em;
}

.entry-meta {
    font-size: 0.72rem;
    color: var(--fg-dim);
    font-family: var(--font-mono);
    margin-bottom: 0.75rem;
    letter-spacing: 0.04em;
}

.entry-desc {
    font-family: var(--font-serif);
    font-size: 0.88rem;
    color: var(--fg);
    line-height: 1.65;
    margin: 0 0 1rem 0;
}

.entry-link {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
    border: 1px solid var(--accent-dim);
    padding: 0.2rem 0.6rem;
    display: inline-block;
    letter-spacing: 0.06em;
    text-decoration: none;
    transition: background 0.1s, color 0.1s;
}

.entry-link:hover {
    background: var(--accent);
    color: var(--bg);
    text-decoration: none;
}

/* ==================== WORLDS PAGE ==================== */
.worlds-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    align-items: start;
}

.worlds-img {
    width: 100%;
    height: auto;
    display: block;
    border: 1px solid var(--border);
    filter: saturate(0.8);
    transition: filter 0.2s;
}

.worlds-img:hover {
    filter: saturate(1.0);
}

.worlds-img-placeholder {
    width: 100%;
    aspect-ratio: 16/9;
    background: #0a0a0a;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--fg-dim);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
}

.status-tag {
    font-size: 0.68rem;
    letter-spacing: 0.07em;
    padding: 0.1em 0.35em;
    border: 1px solid;
}

.status-wip   { color: #ffcc00; border-color: #886600; }
.status-done  { color: var(--accent); border-color: var(--accent-dim); }
.status-hiatus { color: #ff8800; border-color: #884400; }

@media only screen and (max-width: 600px) {
    .worlds-layout {
        grid-template-columns: 1fr;
    }
}

/* ==================== IMAGERY PAGE ==================== */
.gallery-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 0.75rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.75rem;
}

.filter-tabs {
    display: flex;
    gap: 0.25rem;
    flex-wrap: wrap;
}

.filter-btn {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.07em;
    background: transparent;
    color: var(--fg-dim);
    border: 1px solid var(--border);
    padding: 0.25rem 0.6rem;
    cursor: pointer;
    transition: color 0.1s, border-color 0.1s;
}

.filter-btn:hover,
.filter-btn.active {
    color: var(--accent);
    border-color: var(--accent-dim);
}

.size-toggle-btn {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.07em;
    background: transparent;
    color: var(--fg-dim);
    border: 1px solid var(--border);
    padding: 0.25rem 0.6rem;
    cursor: pointer;
    transition: color 0.1s, border-color 0.1s;
}

.size-toggle-btn:hover {
    color: var(--fg);
    border-color: var(--border-hi);
}

.gallery-grid.size-large {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2px;
}

.gallery-grid.size-small {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 2px;
}

.gallery-item {
    position: relative;
    margin: 0;
    overflow: hidden;
    background: #050505;
    cursor: pointer;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    aspect-ratio: 3/2;
    transition: filter 0.15s;
}

.gallery-grid.size-small .gallery-item img {
    aspect-ratio: 1/1;
}

.gallery-item:hover img {
    filter: brightness(0.5);
}

.gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 0.5rem 0.6rem;
    background: linear-gradient(transparent, rgba(0,0,0,0.88));
    transform: translateY(100%);
    transition: transform 0.15s;
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}

.gallery-item:hover .gallery-caption {
    transform: translateY(0);
}

.caption-title {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--fg);
    line-height: 1.2;
}

.caption-sub {
    font-family: var(--font-mono);
    font-size: 0.63rem;
    color: var(--accent-dim);
    letter-spacing: 0.09em;
    text-transform: uppercase;
}

.gallery-item.hidden {
    display: none;
}

/* ==================== LIGHTBOX ==================== */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(0, 0, 0, 0.93);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s;
}

.lightbox.open {
    opacity: 1;
    pointer-events: all;
}

.lb-figure {
    position: relative;
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 90vw;
    max-height: 90vh;
}

.lb-figure img {
    max-width: 90vw;
    max-height: 80vh;
    object-fit: contain;
    display: block;
    border: 1px solid var(--border);
}

.lb-caption {
    margin-top: 0.75rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.lb-title {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--fg);
}

.lb-sub {
    font-family: var(--font-mono);
    font-size: 0.63rem;
    color: var(--accent-dim);
    letter-spacing: 0.09em;
    text-transform: uppercase;
}

.lb-close {
    position: fixed;
    top: 1rem;
    right: 1.25rem;
    font-family: var(--font-mono);
    font-size: 1.5rem;
    line-height: 1;
    color: var(--fg-dim);
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    transition: color 0.1s;
    z-index: 2001;
}

.lb-close:hover { color: var(--fg); }

.lb-prev,
.lb-next {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    font-family: var(--font-mono);
    font-size: 1.1rem;
    color: var(--fg-dim);
    background: transparent;
    border: 1px solid var(--border);
    cursor: pointer;
    padding: 0.5rem 0.75rem;
    transition: color 0.1s, border-color 0.1s;
    z-index: 2001;
}

.lb-prev { left: 1rem; }
.lb-next { right: 1rem; }

.lb-prev:hover,
.lb-next:hover {
    color: var(--accent);
    border-color: var(--accent-dim);
}

/* ==================== NOTES PAGE ==================== */
.notes-list {
    list-style: none;
    padding: 0;
    margin: 0;
    border-top: 1px solid var(--border);
}

.notes-item {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 0.65rem 0;
    border-bottom: 1px solid var(--border);
    gap: 1rem;
}

.notes-empty {
    color: var(--fg-dim);
    font-size: 0.85rem;
    justify-content: flex-start;
}

.notes-link {
    font-family: var(--font-mono);
    font-size: 0.88rem;
    color: var(--fg);
    text-decoration: none;
    transition: color 0.1s;
}

.notes-link:hover {
    color: var(--accent);
    text-decoration: none;
}

.notes-date {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--fg-dim);
    white-space: nowrap;
    flex-shrink: 0;
}

.notes-author {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--fg-dim);
    white-space: nowrap;
    flex-shrink: 0;
}

/* ==================== MARKDOWN BODY (notes detail) ==================== */
.markdown-body {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    line-height: 1.75;
    color: var(--fg);
    max-width: 720px;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
    font-family: var(--font-mono);
    color: var(--accent);
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.25rem;
    margin-top: 2rem;
}

.markdown-body h1 { font-size: 1rem; }
.markdown-body h2 { font-size: 0.92rem; }
.markdown-body h3 { font-size: 0.88rem; }

.markdown-body code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    color: var(--accent);
    background: #0a0a0a;
    border: 1px solid var(--border);
    padding: 0.1em 0.35em;
}

.markdown-body pre {
    background: #0a0a0a;
    border: 1px solid var(--border);
    padding: 1rem;
    overflow-x: auto;
    margin: 1.25rem 0;
}

.markdown-body pre code {
    background: none;
    border: none;
    padding: 0;
    color: var(--fg);
    font-size: 0.88rem;
}

.markdown-body blockquote {
    border-left: 3px solid var(--accent-dim);
    margin: 1rem 0 1rem 0;
    padding: 0.25rem 0 0.25rem 1rem;
    color: var(--fg-dim);
    font-style: italic;
}

.markdown-body a {
    color: var(--accent);
}

.markdown-body hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 2rem 0;
}

.markdown-body table {
    border-collapse: collapse;
    width: 100%;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    margin: 1.25rem 0;
}

.markdown-body th,
.markdown-body td {
    border: 1px solid var(--border);
    padding: 0.4rem 0.7rem;
    text-align: left;
}

.markdown-body th {
    color: var(--accent);
    background: #0a0a0a;
}

/* ==================== BACK LINK ==================== */
.back-link {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--fg-dim);
    letter-spacing: 0.05em;
    display: inline-block;
    margin-bottom: 1.25rem;
    text-decoration: none;
}

.back-link:hover {
    color: var(--accent);
    text-decoration: none;
}