/* ==========================================================================
   nix.lembrik.eu — NixOS Download Aesthetic for Hackers & Power Users
   Palette: Nix Dark Navy #0f141c, Cards #17202e, Borders #26354a
   Accents: #5277c3 (Nix blue), #7eb7ee (Nix cyan/sky), #4ade80 (terminal green)
   ========================================================================== */

:root {
  --bg: #0f141c;
  --bg-card: #17202e;
  --bg-code: #0b1017;
  --bg-surface: #1e2b3e;
  --border: #26354a;
  --border-focus: #3b4e6d;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  
  --nix-blue: #5277c3;
  --nix-blue-hover: #4365af;
  --nix-cyan: #7eb7ee;
  --green: #4ade80;
  --amber: #fbbf24;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Fira Code", monospace;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 14.5px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 36px 20px 80px;
}

/* Header & Top Bar */
.top-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 18px;
  margin-bottom: 28px;
  border-bottom: 1px dashed var(--border);
}

.terminal-prompt {
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--text-muted);
}

.terminal-prompt .user {
  color: var(--green);
  font-weight: 600;
}

.terminal-prompt .domain {
  color: var(--nix-cyan);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

.nav-links .back-link {
  color: var(--nix-cyan);
  border: 1px solid var(--border);
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--bg-card);
}

.nav-links .back-link:hover {
  border-color: var(--border-focus);
  color: #fff;
}

/* Hero Section */
.hero {
  margin-bottom: 28px;
}

.hero-title-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.hero-snowflake {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.hero h1 {
  font-size: 22px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.01em;
}

.hero p {
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.55;
  margin-bottom: 14px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.hero-tag {
  background: var(--bg-card);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  color: var(--nix-cyan);
}

/* Architecture Switcher Tabs */
.arch-switcher {
  display: inline-flex;
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 3px;
  border-radius: 6px;
  margin-bottom: 28px;
  gap: 4px;
  width: 100%;
}

.arch-tab-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 14px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 4px;
  cursor: pointer;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  transition: all 0.15s ease;
}

.arch-tab-btn:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.03);
}

.arch-tab-btn.active {
  background: var(--nix-blue);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
}

/* Sections */
section {
  margin-bottom: 32px;
}

h2 {
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
}

h2 .prompt-char {
  color: var(--green);
  font-weight: bold;
}

/* Download Cards Grid */
.iso-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.iso-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px 18px;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.15s ease;
}

.iso-card:hover {
  border-color: var(--border-focus);
}

.iso-card-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 6px;
}

.iso-name {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
}

.iso-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 3px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--nix-cyan);
}

.iso-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 12px;
}

.iso-details {
  font-family: var(--font-mono);
  font-size: 11.5px;
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 8px 12px;
  margin-bottom: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.iso-detail-row {
  display: flex;
  justify-content: space-between;
}

.iso-detail-row .label {
  color: var(--text-muted);
}

.iso-detail-row .val {
  color: var(--text);
  user-select: all;
}

.iso-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.btn-download-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--nix-blue);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 4px;
  text-decoration: none;
  transition: background 0.15s ease;
}

.btn-download-primary:hover {
  background: var(--nix-blue-hover);
}

.btn-copy-curl {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-surface);
  color: var(--text-muted);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 8px 12px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-copy-curl:hover {
  color: #fff;
  border-color: var(--border-focus);
}

/* Breakdown Box */
.breakdown-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px 18px;
  margin-bottom: 20px;
}

.breakdown-card h3 {
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--nix-cyan);
  margin-bottom: 8px;
}

.breakdown-card p {
  font-size: 13.5px;
  color: var(--text);
  line-height: 1.55;
  margin-bottom: 10px;
}

.breakdown-card p:last-child {
  margin-bottom: 0;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 12px;
}

.feature-list li {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
  padding-left: 18px;
  position: relative;
}

.feature-list li::before {
  content: "•";
  position: absolute;
  left: 4px;
  color: var(--nix-cyan);
}

.feature-list strong {
  color: var(--text);
}

/* Inline Code & Guide Steps */
code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  padding: 1px 5px;
  border-radius: 3px;
  color: var(--nix-cyan);
}

.code-box pre code {
  font-family: inherit;
  font-size: inherit;
  background: transparent;
  border: none;
  padding: 0;
  border-radius: 0;
  color: inherit;
}

.guide-steps {
  list-style: none;
  counter-reset: step-counter;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 10px;
  padding-left: 0;
}

.guide-steps li {
  counter-increment: step-counter;
  position: relative;
  padding-left: 28px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--text);
}

.guide-steps li::before {
  content: counter(step-counter);
  position: absolute;
  left: 0;
  top: 1px;
  width: 18px;
  height: 18px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  color: var(--nix-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
}

.guide-steps li strong {
  color: #ffffff;
}

.inline-code-command {
  margin-top: 6px;
}

.inline-code-command code {
  display: inline-block;
  padding: 4px 8px;
  background: var(--bg-code);
  border: 1px solid var(--border);
  color: var(--green);
}

/* Notice Box */
.notice-box {
  background: var(--bg-card);
  border: 1px solid rgba(251, 191, 36, 0.3);
  border-left: 3px solid var(--amber);
  border-radius: 4px;
  padding: 14px 16px;
  margin-top: 14px;
}

.notice-box h4 {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--amber);
  margin-bottom: 6px;
}

.notice-box p,
.notice-box li {
  font-size: 12.5px;
  color: var(--text-muted);
  line-height: 1.5;
}

.notice-box ul {
  padding-left: 18px;
  margin-top: 6px;
}

/* Code Snippet Box */
.code-box {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  position: relative;
  overflow-x: auto;
}

.code-box pre {
  margin: 0;
  color: #e2e8f0;
}

.copy-mini-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 3px;
  font-size: 10.5px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  padding: 2px 6px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.copy-mini-btn:hover {
  color: #fff;
  border-color: var(--border-focus);
}

/* Syntax Highlighting for Nix (LSP / Tree-sitter style) */
.hl-comment { color: #64748b; font-style: italic; }
.hl-keyword { color: #c084fc; font-weight: 600; }
.hl-attr { color: #7dd3fc; }
.hl-string { color: #86efac; }
.hl-path { color: #fbbf24; }
.hl-fn { color: #60a5fa; }
.hl-punct { color: #94a3b8; }

/* Matrix Table */
.matrix-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 12px;
}

.matrix-table th {
  background: var(--bg-surface);
  color: var(--text-muted);
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  font-size: 11px;
  text-transform: uppercase;
}

.matrix-table td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}

.matrix-table tr:last-child td {
  border-bottom: none;
}

.matrix-table .ok {
  color: var(--green);
}

.matrix-table .na {
  color: var(--text-muted);
}

/* Footer — identical to lembrik.eu */
footer {
  margin-top: 50px;
  padding-top: 20px;
  border-top: 1px dashed var(--border);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.6;
}