:root {
  color-scheme: dark;
  --bg: #080b10;
  --panel: rgba(17, 24, 34, 0.92);
  --panel-strong: #172232;
  --panel-soft: #101822;
  --text: #f8fafc;
  --muted: #98a6b8;
  --line: rgba(148, 163, 184, 0.22);
  --line-strong: rgba(56, 189, 248, 0.34);
  --accent: #2dd4bf;
  --accent-hot: #38bdf8;
  --accent-dark: #0f766e;
  --danger: #f43f5e;
  --warn: #fbbf24;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.42);
  --safe-top: env(safe-area-inset-top);
  --safe-bottom: env(safe-area-inset-bottom);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
  touch-action: manipulation;
  background:
    linear-gradient(rgba(148, 163, 184, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.045) 1px, transparent 1px),
    linear-gradient(135deg, #07090d 0%, #0e1520 48%, #080b10 100%);
  background-size: 28px 28px, 28px 28px, 100% 100%;
}

button,
input {
  font: inherit;
}

.app {
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  grid-template-columns: minmax(300px, 440px) minmax(320px, 1fr);
  gap: 16px;
  padding: max(18px, var(--safe-top)) 18px max(18px, var(--safe-bottom));
}

.setup-panel,
.timer-panel,
.finish-panel {
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0)),
    var(--panel);
  border-radius: 8px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.setup-panel {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 20px;
  position: relative;
  overflow: hidden;
}

.setup-panel::before,
.timer-panel::before {
  content: "";
  display: block;
  height: 3px;
  margin: -20px -20px 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-hot), var(--danger));
}

.brand-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent-hot);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  max-width: 12em;
  font-size: clamp(24px, 5.2vw, 36px);
  line-height: 1.12;
  font-weight: 950;
}

.status-pill {
  flex: 0 0 auto;
  max-width: 124px;
  padding: 8px 11px;
  border: 1px solid rgba(251, 191, 36, 0.28);
  border-radius: 999px;
  color: #fde68a;
  font-size: 12px;
  text-align: center;
  background: rgba(251, 191, 36, 0.08);
}

.status-pill.ready {
  color: #042f2e;
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent), var(--accent-hot));
  box-shadow: 0 0 22px rgba(45, 212, 191, 0.22);
}

.field {
  display: grid;
  gap: 8px;
  color: #cbd5e1;
  font-size: 14px;
  font-weight: 700;
}

.mode-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(2, 6, 23, 0.58);
}

.mode-tab {
  min-height: 44px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
  transition: transform 0.12s ease, background 0.12s ease, border-color 0.12s ease;
}

.mode-tab.active {
  background: linear-gradient(135deg, rgba(45, 212, 191, 0.18), rgba(56, 189, 248, 0.16));
  border-color: var(--line-strong);
  color: var(--text);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.035);
}

.mode-fields {
  display: grid;
  gap: 14px;
}

.mode-fields[hidden] {
  display: none;
}

.field input {
  width: 100%;
  min-height: 56px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(2, 6, 23, 0.66);
  color: var(--text);
  padding: 0 14px;
  font-size: 18px;
  outline: none;
}

.field input:focus {
  border-color: var(--accent-hot);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.14);
}

.small-field input {
  text-align: center;
  font-size: 22px;
  font-weight: 900;
}

.duration-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.duration-grid.two-column {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.delay-duration-groups {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.duration-group {
  min-width: 0;
  margin: 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.duration-group legend {
  padding: 0 6px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.calculated-time {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 48px;
  padding: 0 14px;
  border-left: 3px solid var(--accent);
  background: rgba(45, 212, 191, 0.08);
  color: var(--muted);
  font-size: 14px;
}

.calculated-time strong {
  color: var(--text);
  font-size: 20px;
  font-variant-numeric: tabular-nums;
}

.quick-grid,
.controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

button {
  min-height: 50px;
  border: 0;
  border-radius: 8px;
  color: var(--text);
  cursor: pointer;
  font-weight: 800;
  -webkit-tap-highlight-color: transparent;
  transition: transform 0.12s ease, filter 0.12s ease, box-shadow 0.12s ease;
}

button:active {
  transform: translateY(1px) scale(0.99);
}

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

.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-hot));
  color: #02131a;
  box-shadow: 0 14px 34px rgba(45, 212, 191, 0.18);
}

.secondary,
.ghost,
.tool-button {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.01)), var(--panel-strong);
}

.danger {
  background: rgba(244, 63, 94, 0.15);
  color: #ffe4e6;
  border: 1px solid rgba(244, 63, 94, 0.48);
}

.timer-panel {
  display: grid;
  grid-template-rows: 1fr auto;
  gap: 16px;
  padding: 18px;
  min-height: 520px;
  overflow: hidden;
}

.timer-ring {
  display: grid;
  place-items: center;
  min-height: 420px;
  border-radius: 8px;
  border: 1px solid rgba(148, 163, 184, 0.14);
  background:
    radial-gradient(circle at center, #111827 0 45%, transparent 46%),
    radial-gradient(circle at center, transparent 0 57%, rgba(56, 189, 248, 0.08) 58% 62%, transparent 63%),
    conic-gradient(var(--accent) var(--progress, 0deg), rgba(148, 163, 184, 0.14) 0);
  transition: background 0.2s linear;
}

.timer-content {
  width: min(86%, 620px);
  text-align: center;
}

.state-text {
  min-height: 24px;
  margin: 0 0 10px;
  color: #cbd5e1;
  font-size: clamp(16px, 3.5vw, 22px);
  font-weight: 700;
}

.time-left {
  font-variant-numeric: tabular-nums;
  font-size: clamp(56px, 14vw, 142px);
  line-height: 1;
  font-weight: 900;
  color: #f8fafc;
  text-shadow: 0 0 34px rgba(56, 189, 248, 0.2);
}

.dual-clock {
  display: grid;
  width: min(100%, 600px);
  margin: 0 auto;
  gap: 10px;
}

.dual-clock[hidden] {
  display: none;
}

.clock-row {
  padding: 10px 12px 12px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 8px;
  background: rgba(2, 6, 23, 0.46);
}

.clock-row.front-clock {
  border-color: rgba(56, 189, 248, 0.3);
}

.clock-label {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.channel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #f59e0b;
  box-shadow: 0 0 10px rgba(245, 158, 11, 0.55);
}

.channel-dot.right {
  background: var(--accent-hot);
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.55);
}

.dual-clock .time-left {
  font-size: clamp(42px, 10vw, 88px);
}

.next-alert {
  min-height: 44px;
  margin: 14px auto 0;
  color: var(--muted);
  font-size: clamp(14px, 3vw, 18px);
  line-height: 1.4;
}

.mobile-tools {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.switch {
  min-height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.01)), var(--panel-strong);
  font-weight: 800;
}

.switch input {
  width: 20px;
  height: 20px;
  accent-color: var(--accent);
}

.finish-panel {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  border-color: rgba(244, 63, 94, 0.62);
  background:
    linear-gradient(90deg, rgba(244, 63, 94, 0.22), rgba(244, 63, 94, 0.08)),
    #180b11;
}

.finish-panel[hidden] {
  display: none;
}

.finish-title {
  margin: 0 0 4px;
  color: #fecaca;
  font-size: 26px;
  font-weight: 900;
}

.finish-copy {
  margin: 0;
  color: #ffd6d6;
}

.stop-alarm {
  min-width: 150px;
  background: var(--danger);
}

.flash-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  background: #ff0000;
  z-index: 20;
}

body.final-ten .flash-layer {
  animation: redPulse 1s steps(2, end) infinite;
}

body.alarm-on .flash-layer {
  opacity: 0.78;
  animation: alarmPulse 0.32s steps(2, end) infinite;
}

body.final-ten .time-left,
body.alarm-on .time-left {
  color: #fff;
  text-shadow: 0 0 32px rgba(255, 0, 0, 0.9);
}

@keyframes redPulse {
  0%,
  49% {
    opacity: 0;
  }
  50%,
  100% {
    opacity: 0.72;
  }
}

@keyframes alarmPulse {
  0%,
  49% {
    opacity: 0.9;
  }
  50%,
  100% {
    opacity: 0.24;
  }
}

@media (max-width: 820px) {
  .app {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: max(12px, var(--safe-top)) 12px max(12px, var(--safe-bottom));
  }

  .setup-panel,
  .timer-panel {
    padding: 14px;
  }

  .timer-panel {
    min-height: auto;
  }

  .timer-ring {
    min-height: min(74vw, 430px);
  }
}

@media (max-width: 460px) {
  .brand-row {
    display: grid;
  }

  .status-pill {
    max-width: none;
    justify-self: start;
  }

  .quick-grid,
  .controls,
  .mobile-tools {
    grid-template-columns: 1fr 1fr;
  }

  .duration-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .delay-duration-groups {
    grid-template-columns: 1fr;
  }

  .duration-grid.two-column {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .dual-clock {
    gap: 8px;
  }

  .clock-row {
    padding: 8px 8px 10px;
  }

  .dual-clock .time-left {
    font-size: 44px;
  }

  .mobile-tools .switch {
    grid-column: 1 / -1;
  }

  .finish-panel {
    display: grid;
  }

  .stop-alarm {
    width: 100%;
  }
}