:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --surface-muted: #f1f3f9;
  --border: #e3e6ef;
  --text: #14161f;
  --text-muted: #6b7085;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-soft: #eef0fd;
  --danger: #dc2626;
  --danger-soft: #fdecec;
  --warning-bg: #fff7e6;
  --warning-border: #f4c86a;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(20, 22, 31, 0.04), 0 8px 24px rgba(20, 22, 31, 0.06);
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Section colors -- each card/area gets its own identity instead of one
     flat accent everywhere. */
  --c-blue: #2563eb;
  --c-blue-soft: #eaf1fe;
  --c-green: #059669;
  --c-green-soft: #e7f7f1;
  --c-purple: #7c3aed;
  --c-purple-soft: #f2ecfe;
  --c-amber: #d97706;
  --c-amber-soft: #fdf1e0;
  --c-pink: #db2777;
  --c-pink-soft: #fceaf3;
  --c-teal: #0d9488;
  --c-teal-soft: #e4f6f4;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

header.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 1.5rem;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

header.topbar h1 {
  font-size: 1.1rem;
  font-weight: 800;
  margin: 0;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: linear-gradient(90deg, var(--c-blue), var(--c-purple) 55%, var(--c-pink));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

header.topbar h1::before {
  content: "⏱";
  font-size: 1.15rem;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
}

.card h2 {
  margin: 0 0 1.1rem;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Each card gets a colored top edge and matching heading/button, so the
   page reads as a set of distinct, colorful sections rather than one flat
   accent repeated everywhere. */
.card-blue { border-top: 4px solid var(--c-blue); }
.card-green { border-top: 4px solid var(--c-green); }
.card-purple { border-top: 4px solid var(--c-purple); }
.card-amber { border-top: 4px solid var(--c-amber); }
.card-pink { border-top: 4px solid var(--c-pink); }
.card-teal { border-top: 4px solid var(--c-teal); }

.card-blue h2 { color: var(--c-blue); }
.card-green h2 { color: var(--c-green); }
.card-purple h2 { color: var(--c-purple); }
.card-amber h2 { color: var(--c-amber); }
.card-pink h2 { color: var(--c-pink); }
.card-teal h2 { color: var(--c-teal); }

.card-blue button:not(.secondary):not(.danger) { background: var(--c-blue); }
.card-green button:not(.secondary):not(.danger) { background: var(--c-green); }
.card-purple button:not(.secondary):not(.danger) { background: var(--c-purple); }
.card-amber button:not(.secondary):not(.danger) { background: var(--c-amber); }
.card-pink button:not(.secondary):not(.danger) { background: var(--c-pink); }
.card-teal button:not(.secondary):not(.danger) { background: var(--c-teal); }

.card-blue button:not(.secondary):not(.danger):hover,
.card-green button:not(.secondary):not(.danger):hover,
.card-purple button:not(.secondary):not(.danger):hover,
.card-amber button:not(.secondary):not(.danger):hover,
.card-pink button:not(.secondary):not(.danger):hover,
.card-teal button:not(.secondary):not(.danger):hover {
  filter: brightness(0.9);
}

.card-blue button.secondary { color: var(--c-blue); border-color: var(--c-blue); }
.card-green button.secondary { color: var(--c-green); border-color: var(--c-green); }
.card-purple button.secondary { color: var(--c-purple); border-color: var(--c-purple); }
.card-amber button.secondary { color: var(--c-amber); border-color: var(--c-amber); }
.card-pink button.secondary { color: var(--c-pink); border-color: var(--c-pink); }
.card-teal button.secondary { color: var(--c-teal); border-color: var(--c-teal); }

.card-blue button.secondary:hover { background: var(--c-blue-soft); }
.card-green button.secondary:hover { background: var(--c-green-soft); }
.card-purple button.secondary:hover { background: var(--c-purple-soft); }
.card-amber button.secondary:hover { background: var(--c-amber-soft); }
.card-pink button.secondary:hover { background: var(--c-pink-soft); }
.card-teal button.secondary:hover { background: var(--c-teal-soft); }

.card-blue input:focus, .card-blue select:focus { border-color: var(--c-blue); box-shadow: 0 0 0 3px var(--c-blue-soft); }
.card-green input:focus, .card-green select:focus { border-color: var(--c-green); box-shadow: 0 0 0 3px var(--c-green-soft); }
.card-purple input:focus, .card-purple select:focus { border-color: var(--c-purple); box-shadow: 0 0 0 3px var(--c-purple-soft); }
.card-amber input:focus, .card-amber select:focus { border-color: var(--c-amber); box-shadow: 0 0 0 3px var(--c-amber-soft); }
.card-pink input:focus, .card-pink select:focus { border-color: var(--c-pink); box-shadow: 0 0 0 3px var(--c-pink-soft); }
.card-teal input:focus, .card-teal select:focus { border-color: var(--c-teal); box-shadow: 0 0 0 3px var(--c-teal-soft); }

.stat-row {
  display: flex;
  gap: 0.9rem;
  margin-bottom: 1.25rem;
}

.stat-tile {
  flex: 1;
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  color: white;
  box-shadow: var(--shadow);
}

.stat-tile .stat-value {
  font-size: 1.9rem;
  font-weight: 800;
  line-height: 1.1;
}

.stat-tile .stat-label {
  font-size: 0.8rem;
  font-weight: 600;
  opacity: 0.9;
  margin-top: 0.2rem;
}

.stat-tile-week {
  background: linear-gradient(135deg, var(--c-blue), var(--c-purple));
}

.stat-tile-month {
  background: linear-gradient(135deg, var(--c-pink), var(--c-amber));
}

label {
  display: block;
  font-size: 0.83rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

input, select {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  margin-bottom: 1rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

button {
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.65rem 1.15rem;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  min-height: 44px;
  transition: background 0.15s ease, transform 0.05s ease;
}

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

button:active {
  transform: translateY(1px);
}

button.secondary {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--accent);
}

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

button.danger {
  background: transparent;
  color: var(--danger);
  border: 1.5px solid var(--danger);
  padding: 0.4rem 0.75rem;
  font-size: 0.8rem;
  min-height: 34px;
}

button.danger:hover {
  background: var(--danger-soft);
}

.row {
  display: flex;
  gap: 0.9rem;
}

.row > * {
  flex: 1;
  min-width: 0;
}

.table-scroll {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th, td {
  text-align: left;
  padding: 0.6rem 0.5rem;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

th {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

tbody tr:hover {
  background: var(--surface-muted);
}

.badge-paid, .badge-unpaid {
  display: inline-block;
  border-radius: 999px;
  padding: 0.15rem 0.65rem;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge-paid {
  background: var(--c-green-soft);
  color: var(--c-green);
}

.badge-unpaid {
  background: var(--c-amber-soft);
  color: var(--c-amber);
}

button.small {
  padding: 0.35rem 0.7rem;
  font-size: 0.8rem;
  min-height: 34px;
}

.error {
  color: var(--danger);
  font-size: 0.88rem;
  margin: -0.5rem 0 0.9rem;
}

.muted {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.hidden {
  display: none !important;
}

.timer-active {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: var(--warning-bg);
  border: 1px solid var(--warning-border);
  border-radius: var(--radius);
  padding: 0.9rem 1.15rem;
  margin-bottom: 1.25rem;
}

.pill {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 999px;
  padding: 0.15rem 0.7rem;
  font-size: 0.75rem;
  font-weight: 600;
}

nav a {
  margin-left: 1rem;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
}

nav a:hover {
  text-decoration: underline;
}

#authLoggedIn {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.9rem;
}

@media (max-width: 560px) {
  header.topbar {
    padding: 0.8rem 1rem;
    flex-wrap: wrap;
    row-gap: 0.5rem;
  }

  #authLoggedIn {
    width: 100%;
    justify-content: space-between;
    flex-wrap: wrap;
  }

  main {
    padding: 1.25rem 0.75rem 3rem;
  }

  .card {
    padding: 1.15rem;
  }

  .row {
    flex-direction: column;
    gap: 0;
  }

  .stat-row {
    flex-direction: column;
    gap: 0.75rem;
  }
}