:root {
  color-scheme: dark;
  --bg: #101820;
  --panel: #17232d;
  --panel-2: #202d35;
  --text: #f7f1e5;
  --muted: #a9b3b5;
  --line: rgba(247, 241, 229, 0.14);
  --accent: #f2b84b;
  --accent-2: #67d5b5;
  --danger: #ef6f6c;
}

.demo-mode {
  position: fixed;
  z-index: 1000;
  top: 14px;
  right: 14px;
  padding: 8px 11px;
  border: 1px solid rgba(103, 213, 181, .5);
  border-radius: 8px;
  background: rgba(16, 24, 32, .92);
  color: var(--accent-2);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: .08em;
  pointer-events: none;
}

@media (max-width: 720px) {
  .demo-mode {
    position: static;
    width: fit-content;
    margin: 10px auto -22px;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(135deg, rgba(103, 213, 181, 0.14), transparent 34%),
    linear-gradient(315deg, rgba(242, 184, 75, 0.14), transparent 36%),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input {
  font: inherit;
}

.shell {
  width: min(1060px, calc(100% - 32px));
  min-height: 100vh;
  margin: 0 auto;
  padding: 44px 0;
  display: grid;
  gap: 18px;
  align-content: center;
}

.hero,
.summary article,
.calendar,
.history {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(23, 35, 45, 0.92);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.24);
}

.hero {
  padding: clamp(22px, 4vw, 42px);
}

.hero-top,
.controls,
.section-head,
.session {
  display: flex;
  align-items: center;
}

.hero-top,
.section-head,
.session {
  justify-content: space-between;
  gap: 16px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent-2);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  font-size: clamp(2rem, 6vw, 4.7rem);
  line-height: 0.95;
}

h2 {
  font-size: 1.15rem;
}

.status {
  min-width: 112px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 9px 14px;
  color: var(--accent);
  text-align: center;
  font-weight: 800;
}

.status.running {
  color: var(--accent-2);
}

.active {
  margin: clamp(36px, 7vw, 72px) 0 26px;
}

.active span,
.summary span,
.session span {
  display: block;
  color: var(--muted);
  font-size: 0.88rem;
}

.active strong {
  display: block;
  margin: 8px 0 12px;
  font-variant-numeric: tabular-nums;
  font-size: clamp(4rem, 14vw, 10rem);
  line-height: 0.9;
}

.active p {
  color: var(--muted);
  font-size: 1.05rem;
}

.controls {
  gap: 10px;
}

input {
  min-width: 0;
  flex: 1;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 14px;
  background: var(--panel-2);
  color: var(--text);
}

button {
  min-height: 46px;
  border: 0;
  border-radius: 8px;
  padding: 0 18px;
  background: var(--accent);
  color: #211805;
  font-weight: 900;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

#stopBtn {
  background: var(--danger);
  color: #260706;
}

#refreshBtn {
  min-height: 38px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--text);
}

.summary {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.summary article {
  padding: 20px;
}

.summary strong {
  display: block;
  margin-top: 8px;
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.55rem, 4vw, 2.4rem);
}

.calendar {
  padding: 22px;
}

.calendar-weekdays,
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 8px;
}

.calendar-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.calendar-controls button {
  width: auto;
  min-width: 42px;
  min-height: 38px;
  padding: 0 12px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--text);
}

#todayMonthBtn {
  min-width: 88px;
}

.calendar-weekdays {
  margin-top: 18px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-align: center;
  text-transform: uppercase;
}

.calendar-grid {
  margin-top: 8px;
}

.calendar-day {
  min-height: 68px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px;
  background: rgba(255, 255, 255, 0.035);
  min-width: 0;
}

.calendar-day span {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.calendar-day strong {
  display: block;
  margin-top: 12px;
  font-variant-numeric: tabular-nums;
  font-size: clamp(0.92rem, 2vw, 1.12rem);
  line-height: 1.1;
  max-width: 100%;
  overflow: hidden;
  text-align: left;
  white-space: nowrap;
}

.calendar-day.worked {
  border-color: rgba(103, 213, 181, 0.36);
  background: rgba(103, 213, 181, 0.08);
}

.calendar-day.today {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.calendar-day.muted {
  opacity: 0.38;
}

.history {
  padding: 22px;
}

.sessions {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.session {
  min-height: 58px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.035);
}

.session strong {
  font-variant-numeric: tabular-nums;
}

.session > div:last-child {
  text-align: right;
}

.session small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
}

.session-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 8px;
}

.session-edit,
.session-delete,
.session-form .secondary {
  min-height: 32px;
  padding: 0 12px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--text);
  font-size: 0.85rem;
}

.session-delete {
  background: rgba(239, 111, 108, 0.18);
  color: #ffd8d7;
}

.session.editing {
  display: block;
}

.session-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  width: 100%;
}

.session-form label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.session-form label:nth-child(3) {
  grid-column: 1 / -1;
}

.session-form input {
  width: 100%;
  min-height: 40px;
}

.session-form-actions {
  display: flex;
  gap: 8px;
  grid-column: 1 / -1;
}

.session-form-actions button {
  min-height: 40px;
}

.empty {
  color: var(--muted);
}

@media (max-width: 760px) {
  .shell {
    width: min(100% - 24px, 560px);
    padding: 18px 0;
    align-content: start;
  }

  .hero-top,
  .controls,
  .section-head,
  .session {
    align-items: stretch;
    flex-direction: column;
  }

  .status {
    width: max-content;
  }

  .summary {
    grid-template-columns: 1fr 1fr;
  }

  .calendar {
    padding: 16px;
  }

  .calendar-weekdays,
  .calendar-grid {
    gap: 5px;
  }

  .calendar-controls {
    display: grid;
    grid-template-columns: 42px 1fr 42px;
  }

  .calendar-day {
    min-height: 56px;
    padding: 6px 4px;
  }

  .calendar-day strong {
    margin-top: 8px;
    font-size: clamp(0.62rem, 2.7vw, 0.78rem);
    text-align: center;
  }

  .session > div:last-child {
    text-align: left;
  }

  .session-actions {
    justify-content: flex-start;
  }

  .session-form {
    grid-template-columns: 1fr;
  }

  .session-form label:nth-child(3) {
    grid-column: auto;
  }

  .session-form-actions {
    flex-direction: column;
  }

  button {
    width: 100%;
  }
}