:root {
  --bg: #0e1116;
  --bg-soft: #151a22;
  --bg-card: #1a2029;
  --fg: #e6edf3;
  --fg-dim: #9aa7b4;
  --accent: #58a6ff;
  --accent-dim: #1f6feb33;
  --green: #3fb950;
  --amber: #d29922;
  --red: #f85149;
  --border: #30363d;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
}

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

.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 24px 20px 80px;
}

header.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}

header.app-header h1 {
  margin: 0;
  font-size: 18px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg);
}

header.app-header .who {
  font-size: 12px;
  color: var(--fg-dim);
}

.btn {
  background: var(--bg-card);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 14px;
  font-size: 13px;
  font-family: var(--sans);
  cursor: pointer;
  transition: all 0.12s ease;
}
.btn:hover { border-color: var(--accent); }
.btn.primary {
  background: var(--accent);
  color: #0b1220;
  border-color: var(--accent);
  font-weight: 600;
}
.btn.danger {
  background: #21262d;
  border-color: var(--red);
  color: var(--red);
}
.btn.ghost { background: transparent; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 18px;
  margin-bottom: 18px;
}

/* ---- Big clock card ---- */
.clock-card {
  text-align: center;
  padding: 32px 18px;
}
.clock-card .elapsed {
  font-family: var(--mono);
  font-size: 56px;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.1;
  margin: 8px 0 4px;
  color: var(--fg);
}
.clock-card .status {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 11px;
  color: var(--fg-dim);
  margin-bottom: 16px;
}
.clock-card .status.running {
  color: var(--green);
}
.big-btn {
  font-size: 18px;
  padding: 14px 32px;
  border-radius: 8px;
  border: 2px solid var(--accent);
  background: var(--accent);
  color: #0b1220;
  font-weight: 700;
  letter-spacing: 0.05em;
  cursor: pointer;
  text-transform: uppercase;
  transition: all 0.12s ease;
}
.big-btn:hover { filter: brightness(1.08); }
.big-btn.stop {
  background: var(--red);
  border-color: var(--red);
  color: #fff;
}

/* ---- Totals ---- */
.totals {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.total-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left-width: 4px;
  border-radius: 6px;
  padding: 14px 16px;
}
.total-box .label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fg-dim);
}
.total-box .value {
  font-family: var(--mono);
  font-size: 28px;
  font-weight: 600;
  margin-top: 4px;
}
.total-box .cap {
  font-size: 11px;
  color: var(--fg-dim);
  margin-top: 2px;
}
.total-box.green { border-left-color: var(--green); }
.total-box.green .value { color: var(--green); }
.total-box.amber { border-left-color: var(--amber); }
.total-box.amber .value { color: var(--amber); }
.total-box.red { border-left-color: var(--red); }
.total-box.red .value { color: var(--red); }

/* ---- Session table ---- */
.section-title {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 12px;
  color: var(--fg-dim);
  margin: 24px 0 8px;
}
.session-list {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  font-family: var(--mono);
}
.session-list th, .session-list td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.session-list th {
  color: var(--fg-dim);
  font-weight: 500;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.session-list td.note-col input { width: 100%; }
.session-list td .row-btns { display: flex; gap: 6px; }
.session-list tr.open td { color: var(--green); }
.session-list input {
  background: #0b1016;
  border: 1px solid var(--border);
  color: var(--fg);
  padding: 4px 6px;
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 12px;
}
.session-list input:focus {
  outline: none;
  border-color: var(--accent);
}
.row-btn {
  background: transparent;
  color: var(--fg-dim);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 3px 8px;
  font-size: 11px;
  cursor: pointer;
}
.row-btn:hover { color: var(--fg); }
.row-btn.save { border-color: var(--green); color: var(--green); }
.row-btn.del { border-color: var(--red); color: var(--red); }

.row-add {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0 18px;
  align-items: center;
}
.row-add input { padding: 6px 8px; font-size: 12px; }

/* ---- Settings ---- */
.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.settings-grid label {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fg-dim);
  margin-bottom: 4px;
}
.settings-grid input {
  width: 100%;
  background: #0b1016;
  border: 1px solid var(--border);
  color: var(--fg);
  padding: 8px 10px;
  border-radius: 4px;
  font-family: var(--mono);
}
.settings-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}
.view-url-display {
  font-family: var(--mono);
  font-size: 12px;
  background: #0b1016;
  border: 1px solid var(--border);
  padding: 8px 12px;
  border-radius: 4px;
  word-break: break-all;
  color: var(--fg-dim);
  margin-top: 10px;
}
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-card);
  border: 1px solid var(--accent);
  padding: 10px 18px;
  border-radius: 6px;
  font-size: 13px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  z-index: 1000;
}
.toast.show { opacity: 1; }
.toast.err { border-color: var(--red); color: var(--red); }

/* ---- Login ---- */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.login-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 32px 28px;
  width: 100%;
  max-width: 360px;
}
.login-box h1 {
  margin: 0 0 20px;
  font-size: 18px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  text-align: center;
}
.login-box label {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fg-dim);
  margin: 12px 0 4px;
}
.login-box input {
  width: 100%;
  background: #0b1016;
  border: 1px solid var(--border);
  color: var(--fg);
  padding: 10px 12px;
  border-radius: 4px;
  font-family: var(--mono);
}
.login-box input:focus {
  outline: none;
  border-color: var(--accent);
}
.login-box button {
  margin-top: 20px;
  width: 100%;
}
.login-err {
  color: var(--red);
  font-size: 12px;
  margin-top: 10px;
  min-height: 16px;
}

/* ---- Read-only view ---- */
.view-wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 16px 80px;
}
.view-wrap header {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}
.view-wrap header h1 {
  margin: 0;
  font-size: 16px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-dim);
}
.view-totals {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 24px;
}
.view-sessions {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.view-session {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0;
  padding: 12px 14px;
  border-top: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 12px;
}
.view-session:first-child { border-top: none; }
.view-session.open { background: rgba(63, 185, 80, 0.06); }
.tz-col {
  padding: 0 10px;
  border-left: 1px solid var(--border);
}
.tz-col:first-child { border-left: none; padding-left: 0; }
.tz-col .tz-label {
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--fg-dim);
  margin-bottom: 2px;
}
.tz-col .range {
  color: var(--fg);
}
.tz-col .dur {
  font-size: 11px;
  color: var(--fg-dim);
  margin-top: 2px;
}
.view-note {
  grid-column: 1 / -1;
  padding-top: 6px;
  margin-top: 6px;
  border-top: 1px dashed var(--border);
  color: var(--fg-dim);
  font-family: var(--sans);
  font-size: 12px;
  white-space: pre-wrap;
}

@media (max-width: 640px) {
  .totals, .settings-grid, .view-totals {
    grid-template-columns: 1fr;
  }
  .clock-card .elapsed { font-size: 44px; }
  .view-session { grid-template-columns: 1fr; gap: 8px; }
  .tz-col { border-left: none; padding: 6px 0 0; border-top: 1px dashed var(--border); }
  .tz-col:first-child { border-top: none; padding-top: 0; }
}