:root {
  --bg: #f5f7fa;
  --text: #172026;
  --muted: #64727d;
  --panel: #ffffff;
  --line: #dbe3e9;
  --accent: #0f766e;
  --accent-dark: #0b5d56;
  --amber: #cc7a00;
  --rose: #b4234f;
  --sky: #1d5f99;
  --shadow: 0 18px 40px rgba(19, 31, 42, 0.11);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(135deg, rgba(15, 118, 110, 0.08), transparent 28%),
    linear-gradient(315deg, rgba(204, 122, 0, 0.09), transparent 30%),
    var(--bg);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

button,
input,
textarea {
  font: inherit;
}

button {
  border: 0;
}

.app {
  width: min(1160px, calc(100vw - 28px));
  margin: 0 auto;
  padding: 28px 0;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: clamp(1.55rem, 3vw, 2.45rem);
  letter-spacing: 0;
  line-height: 1.1;
}

h2 {
  font-size: 1rem;
  letter-spacing: 0;
}

.date-chip,
.counter {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.7);
  color: var(--muted);
  font-size: 0.88rem;
  white-space: nowrap;
}

.grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.95fr) minmax(320px, 1.2fr);
  gap: 16px;
}

.panel {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
}

.panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 18px;
  border-bottom: 1px solid var(--line);
}

.panel-head.compact {
  align-items: center;
}

.focus-panel {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 520px;
}

.focus-panel .panel-head p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.94rem;
}

.icon-btn {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  color: var(--muted);
  cursor: pointer;
}

.icon-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.timer-ring {
  position: relative;
  display: grid;
  place-items: center;
  padding: 24px;
}

.timer-ring svg {
  width: min(78%, 310px);
  aspect-ratio: 1;
  transform: rotate(-90deg);
}

.ring-track,
.ring-progress {
  fill: none;
  stroke-width: 9;
}

.ring-track {
  stroke: #e5ebef;
}

.ring-progress {
  stroke: var(--accent);
  stroke-linecap: round;
  stroke-dasharray: 326.73;
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 220ms ease;
}

#timerText {
  position: absolute;
  font-size: clamp(2.15rem, 7vw, 4.3rem);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0;
}

.timer-actions,
.quick-log {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  padding: 18px;
  border-top: 1px solid var(--line);
}

.quick-log {
  grid-template-columns: repeat(2, 1fr);
  border-top: 0;
  padding-top: 0;
}

.primary,
.secondary {
  min-height: 42px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 750;
}

.primary {
  background: var(--accent);
  color: #ffffff;
}

.primary:hover {
  background: var(--accent-dark);
}

.secondary {
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--text);
}

.secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.input-row {
  display: grid;
  grid-template-columns: 1fr 76px;
  gap: 10px;
  padding: 18px;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  color: var(--text);
}

input {
  min-height: 42px;
  padding: 0 12px;
}

textarea {
  min-height: 348px;
  resize: vertical;
  padding: 14px;
  border: 0;
  border-radius: 0 0 8px 8px;
  line-height: 1.6;
}

input:focus,
textarea:focus {
  outline: 2px solid rgba(15, 118, 110, 0.28);
  outline-offset: 1px;
}

.task-list {
  display: grid;
  gap: 8px;
  min-height: 220px;
  margin: 0;
  padding: 0 18px 18px;
  list-style: none;
}

.task-item {
  display: grid;
  grid-template-columns: 28px 1fr 34px;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.task-item input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.task-text {
  overflow-wrap: anywhere;
  line-height: 1.35;
}

.task-item.is-done .task-text {
  color: var(--muted);
  text-decoration: line-through;
}

.delete-task {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 7px;
  background: #f6f8fa;
  color: var(--muted);
  cursor: pointer;
}

.delete-task:hover {
  color: var(--rose);
}

.notes-panel {
  grid-column: 2;
}

.pulse-grid {
  display: grid;
  grid-template-columns: repeat(14, 1fr);
  gap: 7px;
  padding: 18px;
}

.pulse-day {
  min-height: 52px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f4f7f8;
}

.pulse-day[data-level="1"] {
  background: #cdece7;
}

.pulse-day[data-level="2"] {
  background: #7fc9bd;
}

.pulse-day[data-level="3"] {
  background: #0f766e;
}

.pulse-day span {
  display: block;
  padding: 6px;
  color: rgba(23, 32, 38, 0.72);
  font-size: 0.72rem;
  font-weight: 750;
}

@media (max-width: 820px) {
  .app {
    width: min(100vw - 20px, 640px);
    padding: 18px 0;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .grid,
  .notes-panel {
    grid-template-columns: 1fr;
    grid-column: auto;
  }

  .focus-panel {
    min-height: 470px;
  }

  .timer-actions {
    grid-template-columns: repeat(2, 1fr);
  }

  .pulse-grid {
    grid-template-columns: repeat(7, 1fr);
  }
}