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

:root {
  --font: Arial, Helvetica, sans-serif;
  --text: #222;
  --text-muted: #555;
  --border: #ccc;
  --bg: #f5f5f5;
  --white: #fff;
  --accent: #1a6fc4;
  --accent-hover: #155a9e;
  --green: #267326;
  --radius: 4px;
  --shadow: 0 1px 3px rgba(0,0,0,0.12);
}

html { font-size: 15px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 16px;
  width: 100%;
}

/* ===== Header ===== */
.site-header {
  background: #1a1a1a;
  padding: 10px 0;
  border-bottom: 2px solid #444;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  color: #fff;
  font-size: 1.2rem;
  font-weight: bold;
  letter-spacing: -0.01em;
}

.site-header nav { display: flex; gap: 20px; }
.site-header nav a { color: #ccc; font-size: 0.88rem; }
.site-header nav a:hover { color: #fff; text-decoration: none; }

/* ===== Main layout ===== */
main.container {
  flex: 1;
  padding-top: 20px;
  padding-bottom: 50px;
}

/* ===== Ad slots ===== */
.ad-slot { margin: 12px 0; }
.ad-placeholder {
  background: #e8e8e8;
  border: 1px dashed #bbb;
  color: #999;
  font-size: 0.72rem;
  text-align: center;
  padding: 12px;
  letter-spacing: 0.05em;
}

/* ===== Top section: epoch + clock side by side ===== */
.top-section {
  display: flex;
  align-items: stretch;
  gap: 0;
  background: var(--white);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  margin-bottom: 18px;
}

.epoch-main {
  flex: 1;
  padding: 18px 24px;
  border-right: 1px solid var(--border);
}

.epoch-main h1 {
  font-size: 1.05rem;
  font-weight: bold;
  color: var(--text-muted);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 0.82rem;
}

.epoch-number {
  font-size: 2.6rem;
  font-weight: bold;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 10px;
}

.epoch-variants {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.epoch-variants span b { color: var(--text); }

.live-clock {
  min-width: 240px;
  padding: 18px 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
}

.live-clock .clock-row {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.clock-label {
  font-size: 0.72rem;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.clock-value {
  font-size: 0.95rem;
  font-weight: bold;
  color: var(--green);
  font-variant-numeric: tabular-nums;
}

.clock-tz {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ===== Tool card ===== */
.tool-card {
  background: var(--white);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  margin-bottom: 18px;
}

.tool-card-header {
  background: #f0f0f0;
  border-bottom: 1px solid var(--border);
  padding: 8px 16px;
  font-size: 0.9rem;
  font-weight: bold;
  color: var(--text);
}

.tool-card-body {
  padding: 16px;
}

/* ===== Converter form ===== */
.converter-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.converter-row label {
  font-size: 0.88rem;
  color: var(--text-muted);
  white-space: nowrap;
}

input[type="number"],
input[type="datetime-local"],
input[type="text"] {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 10px;
  font-size: 0.92rem;
  font-family: var(--font);
  color: var(--text);
  background: var(--white);
  outline: none;
}

input[type="number"]:focus,
input[type="datetime-local"]:focus,
input[type="text"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(26,111,196,0.15);
}

input[type="number"] { width: 200px; }
input[type="datetime-local"] { width: 220px; }

button {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 6px 18px;
  font-size: 0.88rem;
  font-weight: bold;
  cursor: pointer;
}

button:hover { background: var(--accent-hover); }

.result-table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.88rem;
  margin-top: 10px;
}

.result-table td {
  padding: 5px 10px;
  border: 1px solid #e0e0e0;
  vertical-align: top;
}

.result-table td:first-child {
  width: 170px;
  color: var(--text-muted);
  background: #fafafa;
  font-weight: bold;
  white-space: nowrap;
}

.result-table td:last-child {
  color: var(--green);
  font-weight: bold;
  font-variant-numeric: tabular-nums;
}

.error-msg {
  color: #c0392b;
  font-size: 0.85rem;
  margin-top: 6px;
}

/* ===== Secondary button ===== */
.btn-secondary {
  background: #fff;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn-secondary:hover { background: #f0f5ff; }

/* ===== Code snippets ===== */
.snippet-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 12px;
}

.snippet {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 0.82rem;
}

.snippet-lang {
  background: #f0f0f0;
  border-bottom: 1px solid var(--border);
  padding: 4px 10px 4px 10px;
  font-size: 0.75rem;
  font-weight: bold;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.copy-btn {
  background: none;
  border: 1px solid #bbb;
  border-radius: 3px;
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: normal;
  padding: 2px 8px;
  cursor: pointer;
  text-transform: none;
  letter-spacing: 0;
}

.copy-btn:hover { background: #e0e0e0; color: var(--text); }
.copy-btn.copied { border-color: var(--green); color: var(--green); }

.epoch-number-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.copy-inline {
  flex-shrink: 0;
  align-self: center;
}

.copy-cell {
  width: 70px;
  text-align: right;
  border: none !important;
  background: transparent !important;
  padding: 3px 6px !important;
}

.unit-note {
  color: var(--accent) !important;
  font-weight: bold !important;
}

/* Pause button active state */
.copy-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: #f0f5ff;
}

/* Timezone selector inside result table */
.tz-select {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 3px 6px;
  font-size: 0.82rem;
  font-family: var(--font);
  color: var(--text);
  background: #fff;
  max-width: 100%;
  cursor: pointer;
}

/* Local / UTC interpretation toggle */
.dt-mode {
  margin-top: -2px;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.dt-mode-label { font-weight: bold; }
.dt-mode label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
}
.dt-mode input[type="radio"] { cursor: pointer; }

.snippet pre {
  margin: 0;
  padding: 10px;
  background: #fafafa;
  overflow-x: auto;
}

.snippet code {
  font-family: 'Courier New', Consolas, monospace;
  font-size: 0.82rem;
  color: #1a1a1a;
  white-space: pre;
}

.snippet .cmt { color: #888; }

/* ===== epoch eyebrow ===== */
.epoch-eyebrow {
  font-size: 0.75rem;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 6px;
}

/* ===== Info section ===== */
.info-section {
  background: var(--white);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 18px 20px;
  margin-bottom: 18px;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.info-section h2 {
  font-size: 1rem;
  font-weight: bold;
  color: var(--text);
  margin-bottom: 8px;
}

.info-section p { margin-bottom: 8px; }
.info-section strong { color: var(--text); }
.info-section a { color: var(--accent); }

.ref-table {
  border-collapse: collapse;
  font-size: 0.85rem;
  margin-top: 10px;
  width: 100%;
}

.ref-table th {
  background: #f0f0f0;
  border: 1px solid var(--border);
  padding: 6px 12px;
  text-align: left;
  font-size: 0.8rem;
}

.ref-table td {
  border: 1px solid #e0e0e0;
  padding: 5px 12px;
  font-variant-numeric: tabular-nums;
}

.ref-table tr:nth-child(even) td { background: #fafafa; }

/* Language grid */
.lang-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.lang-grid a {
  background: #f0f0f0;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 5px 12px;
  font-size: 0.85rem;
  color: var(--accent);
  text-decoration: none;
}

.lang-grid a:hover {
  background: #e0ecff;
  border-color: var(--accent);
}

/* ===== Info page ===== */
.info-page {
  background: var(--white);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 24px 28px;
  margin: 20px 0 50px;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.75;
}

.info-page h1 { font-size: 1.4rem; color: var(--text); margin-bottom: 16px; }
.info-page h2 { font-size: 1.05rem; color: var(--text); margin: 24px 0 8px; border-top: 1px solid #eee; padding-top: 16px; }
.info-page p { margin-bottom: 10px; max-width: 720px; }
.info-page ul { padding-left: 20px; margin-bottom: 12px; }
.info-page li { margin-bottom: 6px; }
.info-page strong { color: var(--text); }
.info-page code {
  background: #f4f4f4;
  border: 1px solid #ddd;
  border-radius: 3px;
  padding: 1px 5px;
  font-size: 0.85em;
  color: #c7254e;
}

/* ===== Footer ===== */
.site-footer {
  background: #1a1a1a;
  border-top: 2px solid #444;
  padding: 16px 0;
  color: #aaa;
  font-size: 0.82rem;
}

.site-footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.site-footer nav { display: flex; gap: 16px; }
.site-footer nav a { color: #aaa; }
.site-footer nav a:hover { color: #fff; text-decoration: none; }

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .top-section { flex-direction: column; }
  .epoch-main { border-right: none; border-bottom: 1px solid var(--border); }
  .live-clock { border-top: none; }
  .epoch-number { font-size: 2rem; }
  input[type="number"], input[type="datetime-local"] { width: 100%; }
  .converter-row { flex-direction: column; align-items: flex-start; }
  .result-table td:first-child { width: 120px; }
}