:root {
  --bg: #f4f6f8;
  --card: #ffffff;
  --text: #18202a;
  --muted: #5b6675;
  --line: #dbe1e8;
  --primary: #1f6feb;
  --primary-hover: #1556bf;
  --danger: #c93c37;
  --danger-hover: #ab2f2b;
  --shadow: 0 12px 30px rgba(17, 23, 30, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Manrope", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 10%, #ffffff, transparent 40%),
    radial-gradient(circle at 90% 90%, #e9eff8, transparent 35%),
    var(--bg);
}

.app-shell {
  max-width: 980px;
  margin: 0 auto;
  padding: 48px 20px;
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 24px;
}

h1,
h2 {
  margin: 0;
  font-weight: 700;
}

.subtitle {
  margin-top: 10px;
  color: var(--muted);
}

.time-display {
  margin: 24px 0;
  font-size: clamp(3rem, 10vw, 4.4rem);
  font-weight: 700;
  letter-spacing: 0.03em;
  text-align: center;
}

.session-config,
.task-row {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
}

label {
  font-size: 0.92rem;
  color: var(--muted);
  font-weight: 600;
}

select,
input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  font: inherit;
  padding: 12px;
  color: var(--text);
  background: #fff;
}

select:focus,
input:focus,
textarea:focus,
button:focus {
  outline: 2px solid #7baeff;
  outline-offset: 2px;
}

.clock-picker {
  display: grid;
  justify-items: center;
  gap: 10px;
  padding: 10px 0 6px;
}

.clock-dial {
  width: min(240px, 70vw);
  max-width: 240px;
  cursor: grab;
  touch-action: none;
}

.clock-dial.is-disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.clock-dial:focus {
  outline: 2px solid #7baeff;
  outline-offset: 4px;
  border-radius: 50%;
}

.clock-face {
  fill: #f8fafc;
  stroke: var(--line);
  stroke-width: 2;
}

.clock-tick {
  stroke: #9aabbe;
  stroke-width: 2;
}

.clock-tick.major {
  stroke: #74879d;
  stroke-width: 2.8;
}

.clock-hand {
  stroke: var(--primary);
  stroke-width: 4;
  stroke-linecap: round;
}

.clock-center {
  fill: var(--primary);
}

.clock-value {
  margin: 0;
  color: #2b3645;
  font-weight: 700;
  letter-spacing: 0.02em;
}

textarea {
  resize: vertical;
  min-height: 100px;
}

.controls {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
}

.btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  padding: 10px 14px;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
}

.btn:hover:enabled {
  background: #f6f8fb;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-primary {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover:enabled {
  background: var(--primary-hover);
}

.btn-danger {
  border-color: var(--danger);
  color: #fff;
  background: var(--danger);
}

.btn-danger:hover:enabled {
  background: var(--danger-hover);
}

.log-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.notes-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.notes-input-row {
  display: grid;
  gap: 8px;
}

.notes-actions {
  margin-top: 12px;
}

.notes-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.notes-list li {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.note-content {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  color: #2b3645;
}

.empty-note {
  color: var(--muted);
  font-style: italic;
}

.note-delete {
  padding: 6px 10px;
  font-size: 0.86rem;
  white-space: nowrap;
}

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

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  text-align: left;
  padding: 12px 8px;
  border-bottom: 1px solid var(--line);
  font-size: 0.95rem;
}

th {
  font-weight: 700;
  color: #2b3645;
}

.empty-row td {
  color: var(--muted);
  text-align: center;
  font-style: italic;
}

@media (max-width: 640px) {
  .app-shell {
    padding: 24px 14px;
  }

  .card {
    padding: 18px;
    border-radius: 12px;
  }

  .controls {
    flex-wrap: wrap;
  }

  .btn {
    flex: 1 1 120px;
  }
}