/* ==========================================================================
   TroubleNow.org - Sysadmin / Developer Notebook Theme
   Zero external dependencies • Fast • Accessible • Responsive
   ========================================================================== */

:root {
  /* Color Palette - Dark by default (sysadmin notebook vibe) */
  --bg-primary: #0f141c;
  --bg-secondary: #161d27;
  --bg-surface: #1c2430;
  --bg-code: #0b0f15;
  --border-color: #2b3544;
  --border-subtle: #222b37;
  
  --text-primary: #e6edf3;
  --text-secondary: #9da7b3;
  --text-muted: #6e7987;
  
  --accent: #38bdf8;          /* Bright cyan / sky */
  --accent-hover: #7dd3fc;
  --accent-subtle: rgba(56, 189, 248, 0.12);
  
  --tag-bg: #222d3d;
  --tag-text: #7dd3fc;
  --tag-border: #2d3b4e;
  
  --success: #34d399;
  --warning: #fbbf24;
  --danger: #f87171;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  --max-width: 860px;
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-surface: #f1f5f9;
  --bg-code: #f1f5f9;
  --border-color: #cbd5e1;
  --border-subtle: #e2e8f0;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  --accent: #0284c7;
  --accent-hover: #0369a1;
  --accent-subtle: rgba(2, 132, 199, 0.08);
  
  --tag-bg: #e0f2fe;
  --tag-text: #0369a1;
  --tag-border: #bae6fd;
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  color-scheme: dark light;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Layout */
.site-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-header {
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
}

.site-brand:hover .site-title {
  color: var(--accent);
}

.brand-logo {
  border-radius: var(--radius-sm);
  display: block;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.site-title {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  transition: color 0.15s ease;
}

.site-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--text-primary);
  background-color: var(--bg-surface);
}

.theme-toggle {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.9rem;
  line-height: 1;
  transition: all 0.15s ease;
}

.theme-toggle:hover {
  border-color: var(--accent);
}

/* Main Content */
.main-content {
  flex: 1;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

/* Terminal Banner */
.terminal-banner {
  background-color: var(--bg-code);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
}

.terminal-bar {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  padding: 0.5rem 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.terminal-dot.red { background-color: #ef4444; }
.terminal-dot.yellow { background-color: #eab308; }
.terminal-dot.green { background-color: #22c55e; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-left: 0.5rem;
}

.terminal-body {
  padding: 1rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.88rem;
}

.terminal-line {
  color: var(--text-secondary);
  margin-bottom: 0.35rem;
}

.t-prompt {
  color: var(--success);
  font-weight: 700;
  margin-right: 0.35rem;
}

.terminal-output {
  color: var(--text-primary);
  opacity: 0.9;
}

/* Controls & Filter Panel */
.controls-panel {
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.search-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 0.85rem;
  color: var(--text-muted);
  font-size: 1.1rem;
  pointer-events: none;
}

.search-wrap input {
  width: 100%;
  padding: 0.75rem 5.5rem 0.75rem 2.5rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.search-wrap input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-subtle);
}

.post-count {
  position: absolute;
  right: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  background-color: var(--bg-surface);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  pointer-events: none;
}

.tags-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.filter-pill {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.filter-pill:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}

.filter-pill.active {
  background-color: var(--accent);
  color: #0b0f15;
  border-color: var(--accent);
  font-weight: 600;
}

/* Post Sections */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
  flex-wrap: wrap;
  gap: 0.5rem;
}

.section-header h2 {
  font-size: 1.25rem;
  font-family: var(--font-mono);
  font-weight: 600;
}

.header-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.header-hint code {
  font-family: var(--font-mono);
  color: var(--accent);
}

/* Post List */
.posts-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.post-row {
  display: grid;
  grid-template-columns: 105px 1fr auto;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: border-color 0.15s ease, transform 0.1s ease;
}

.post-row:hover {
  border-color: var(--accent);
  background-color: var(--bg-surface);
}

.post-row-date {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.post-row-title {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.98rem;
  transition: color 0.15s ease;
}

.post-row:hover .post-row-title {
  color: var(--accent);
}

.badge-archived {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  background-color: rgba(234, 179, 8, 0.15);
  color: var(--warning);
  border: 1px solid rgba(234, 179, 8, 0.3);
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-sm);
  margin-left: 0.4rem;
  vertical-align: middle;
}

.post-row-tags {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background-color: var(--tag-bg);
  color: var(--tag-text);
  border: 1px solid var(--tag-border);
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  white-space: nowrap;
}

.no-results {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
  font-style: italic;
}

/* Pagination Controls */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
  flex-wrap: wrap;
}

.pagination-btn,
.pagination-page {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.25rem;
  height: 2.25rem;
  padding: 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  text-decoration: none;
  transition: all 0.15s ease;
  user-select: none;
}

.pagination-btn:hover:not(.disabled),
.pagination-page:hover:not(.active) {
  border-color: var(--accent);
  color: var(--accent);
  background-color: var(--bg-surface);
}

.pagination-page.active {
  background-color: var(--accent);
  border-color: var(--accent);
  color: #0f141c;
  font-weight: 700;
  cursor: default;
}

[data-theme="light"] .pagination-page.active {
  color: #ffffff;
}

.pagination-btn.disabled {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
  border-color: var(--border-subtle);
  color: var(--text-muted);
}

/* Post Article Styles */
.post-article {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2.5rem;
  box-shadow: var(--shadow-sm);
}

.post-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.post-meta time {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.post-tags {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.post-title {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

/* Post Body Content */
.post-body {
  font-size: 1.05rem;
  color: var(--text-primary);
  line-height: 1.75;
}

.post-body p {
  margin-bottom: 1.35rem;
}

.post-body h2 {
  font-size: 1.45rem;
  margin-top: 2.25rem;
  margin-bottom: 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border-subtle);
  font-weight: 600;
}

.post-body h3 {
  font-size: 1.2rem;
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
  font-weight: 600;
}

.post-body ul, .post-body ol {
  margin-bottom: 1.35rem;
  padding-left: 1.6rem;
}

.post-body li {
  margin-bottom: 0.4rem;
}

.post-body a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.15s ease;
}

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

.post-body img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  margin: 1.25rem 0;
  display: block;
}

.img-align-left {
  float: left;
  margin-right: 1.5rem;
  margin-bottom: 1rem;
}

.img-align-right {
  float: right;
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

/* Code Blocks */
.post-body code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background-color: var(--bg-code);
  border: 1px solid var(--border-subtle);
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
}

.post-body pre {
  background-color: var(--bg-code);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin: 1.5rem 0;
  overflow-x: auto;
  position: relative;
}

.post-body pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-primary);
  display: block;
  white-space: pre;
}

/* Copy button on code blocks */
.copy-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  opacity: 0.7;
  transition: all 0.15s ease;
}

.copy-btn:hover {
  opacity: 1;
  color: var(--text-primary);
  border-color: var(--accent);
}

.copy-btn.copied {
  color: var(--success);
  border-color: var(--success);
}

/* Notices & Alerts */
.archived-notice {
  background-color: rgba(234, 179, 8, 0.08);
  border-left: 4px solid var(--warning);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-bottom: 1.5rem;
}

.archived-notice p {
  margin-bottom: 0.5rem;
}

.archived-notice p:last-child {
  margin-bottom: 0;
}

/* Post Navigation Footer */
.post-footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.post-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  font-family: var(--font-mono);
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.15s ease;
}

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

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

/* About Page */
.about-hero {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.about-avatar {
  border-radius: 50%;
  border: 2px solid var(--accent);
  flex-shrink: 0;
}

.about-intro {
  font-size: 1.1rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.25rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.88rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.footer-sub {
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

/* Responsive Media Queries */
@media (max-width: 680px) {
  .post-row {
    grid-template-columns: 1fr;
    gap: 0.4rem;
  }
  
  .post-row-tags {
    margin-top: 0.2rem;
  }
  
  .post-article {
    padding: 1.5rem 1.25rem;
  }
  
  .post-title {
    font-size: 1.5rem;
  }
  
  .about-hero {
    flex-direction: column;
    text-align: center;
  }
}

@media print {
  .site-header, .site-footer, .controls-panel, .post-footer, .theme-toggle {
    display: none !important;
  }
  body, .post-article {
    background: #fff !important;
    color: #000 !important;
    border: none !important;
    box-shadow: none !important;
  }
}