:root {
  --background: #f5f7fb;
  --ink: #182033;
  --muted: #667085;
  --panel: #ffffff;
  --line: #d7dce8;
  --accent: #145df2;
  --accent-ink: #ffffff;
  --play-bg: #e53935;
  --play-ink: #ffffff;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--ink);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

button,
input {
  font: inherit;
}

.app {
  min-height: 100svh;
}

.screen {
  min-height: 100svh;
  padding: max(18px, env(safe-area-inset-top)) 18px max(18px, env(safe-area-inset-bottom));
}

.is-hidden {
  display: none;
}

.setup-screen {
  display: grid;
  place-items: center;
}

.login-screen,
.account-screen {
  display: grid;
  place-items: center;
}

.login-screen.is-hidden,
.account-screen.is-hidden {
  display: none;
}

.setup-panel {
  width: min(100%, 460px);
}

.auth-panel,
.account-panel {
  width: min(100%, 460px);
}

.app-header {
  display: grid;
  grid-template-columns: 1fr 72px;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
  border-bottom: 4px solid #17c100ff;
  border-radius: 8px 8px 0 0;
  background: #e7e9ee;
  padding: 14px;
}

.header-copy {
  min-width: 0;
}

.eyebrow {
  margin: 0 0 6px;
  color: #17c100ff;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  color: #000000;
  font-size: clamp(1.1rem, 6vw, 2.3rem);
  line-height: 1;
}

.header-logo {
  width: 72px;
  aspect-ratio: 1;
  border-radius: 8px;
  object-fit: contain;
  justify-self: end;
}

.settings {
  display: grid;
  gap: 16px;
}

.tool-menu {
  position: relative;
  display: grid;
  gap: 8px;
}

.tool-menu-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  min-height: 56px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
  font-weight: 900;
  padding: 10px 14px;
  touch-action: manipulation;
}

.hamburger {
  display: grid;
  gap: 5px;
  width: 28px;
  flex: 0 0 auto;
}

.hamburger span {
  display: block;
  height: 3px;
  border-radius: 999px;
  background: currentColor;
}

.tool-menu-list {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  z-index: 5;
  display: grid;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 10px 24px rgba(24, 32, 51, 0.16);
  padding: 6px;
}

.tool-menu-list.is-hidden {
  display: none;
}

.tool-menu-group {
  display: grid;
  gap: 5px;
  border-top: 1px solid var(--line);
  padding-top: 6px;
}

.tool-menu-group:first-child {
  border-top: 0;
  padding-top: 0;
}

.tool-group-button {
  min-height: 48px;
  border: 0;
  border-radius: 6px;
  background: #f3f6fb;
  color: var(--ink);
  font-weight: 950;
  padding: 8px 10px;
  text-align: left;
  touch-action: manipulation;
}

.tool-group-button::after {
  content: "›";
  float: right;
  font-size: 1.2rem;
  line-height: 1;
  transform: rotate(90deg);
}

.tool-group-button[aria-expanded="true"]::after {
  transform: rotate(-90deg);
}

.tool-group-items {
  display: grid;
  gap: 5px;
  padding-left: 8px;
}

.tool-group-items.is-hidden {
  display: none;
}

.tool-option {
  min-height: 48px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font-weight: 900;
  padding: 8px 10px;
  text-align: left;
  touch-action: manipulation;
}

.tool-option.is-active {
  background: #eef4ff;
  color: var(--ink);
}

.field {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-weight: 700;
}

.field input {
  width: 100%;
  min-height: 54px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
  font-size: 1.25rem;
  font-weight: 800;
  padding: 10px 14px;
}

.field input:focus {
  border-color: var(--accent);
  outline: 3px solid rgba(20, 93, 242, 0.16);
}

.switch-field {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 56px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--muted);
  font-weight: 900;
  padding: 10px 14px;
}

.switch-field input {
  width: 24px;
  height: 24px;
  accent-color: var(--accent);
}

.check-field {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 48px;
  color: var(--muted);
  font-weight: 900;
}

.check-field input {
  width: 24px;
  height: 24px;
  accent-color: var(--accent);
}

.color-list {
  display: grid;
  gap: 8px;
}

.color-row {
  display: flex;
  align-items: center;
  min-height: 46px;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 10px 12px;
  font-weight: 800;
}

.color-row.is-disabled {
  color: #98a2b3;
  opacity: 0.58;
}

.swatch {
  width: 24px;
  height: 24px;
  flex: 0 0 auto;
  border: 2px solid rgba(24, 32, 51, 0.18);
  border-radius: 50%;
}

.red {
  background: #e53935;
}

.green {
  background: #18a058;
}

.blue {
  background: #1565c0;
}

.yellow {
  background: #f5d342;
}

.pink {
  background: #ff4fb3;
}

.time-fieldset {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  min-width: 0;
  margin: 0;
  border: 0;
  padding: 0;
}

.interval-fieldset.is-hidden {
  display: none;
}

.tabata-settings {
  display: grid;
  gap: 16px;
}

.tone-settings {
  display: grid;
  gap: 12px;
}

.movement-settings {
  display: grid;
  gap: 12px;
}

.stability-settings {
  display: grid;
  gap: 12px;
}

.direction-settings {
  display: grid;
  gap: 12px;
}

.tabata-settings.is-hidden,
.tone-settings.is-hidden,
.movement-settings.is-hidden,
.stability-settings.is-hidden,
.direction-settings.is-hidden,
.color-only-setting.is-hidden,
.countdown-setting.is-hidden {
  display: none;
}

.range-field input[type="range"] {
  min-height: 44px;
  padding: 0;
  accent-color: var(--accent);
}

.number-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.total-time {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 58px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--muted);
  font-weight: 900;
  padding: 12px 14px;
}

.total-time strong {
  color: var(--ink);
  font-size: 1.45rem;
  font-variant-numeric: tabular-nums;
}

.time-fieldset legend {
  grid-column: 1 / -1;
  margin-bottom: 8px;
  color: var(--muted);
  font-weight: 800;
}

.message {
  min-height: 22px;
  margin: 0;
  color: #b42318;
  font-weight: 800;
}

.action-row {
  display: grid;
  gap: 12px;
}

.account-area {
  display: grid;
  gap: 10px;
  margin-top: 18px;
  border-top: 3px solid #17c100ff;
  padding-top: 14px;
}

.account-area p {
  margin: 0;
  color: var(--muted);
  font-weight: 900;
  text-align: center;
}

.account-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.account-actions .button:last-child {
  grid-column: 1 / -1;
}

.account-topbar {
  display: grid;
  grid-template-columns: 56px 1fr;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.account-topbar h2 {
  margin: 0;
  font-size: clamp(1.4rem, 7vw, 2rem);
}

.user-list {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

.user-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 10px 12px;
}

.user-actions {
  display: grid;
  grid-template-columns: auto auto;
  gap: 8px;
}

.user-row strong {
  display: block;
}

.user-row span {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 800;
}

.danger-button {
  min-height: 44px;
  border: 0;
  border-radius: 8px;
  background: #b42318;
  color: #ffffff;
  font-weight: 900;
  padding: 8px 12px;
}

.role-button {
  min-height: 44px;
  border: 0;
  border-radius: 8px;
  background: #e7f8e8;
  color: #126b20;
  font-weight: 900;
  padding: 8px 12px;
}

.danger-button:disabled,
.role-button:disabled {
  opacity: 0.45;
}

.button {
  min-height: 56px;
  border: 0;
  border-radius: 8px;
  font-weight: 900;
  padding: 12px 16px;
  touch-action: manipulation;
}

.button:active,
.icon-button:active,
.change-button:active,
.tool-menu-button:active,
.tool-group-button:active,
.tool-option:active {
  transform: translateY(1px) scale(0.99);
}

.button:disabled {
  cursor: wait;
  opacity: 0.72;
}

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

.secondary {
  background: #202939;
  color: #ffffff;
}

.play-screen {
  position: relative;
  display: grid;
  grid-template-rows: auto 1fr auto;
  overflow: hidden;
  background: var(--play-bg);
  color: var(--play-ink);
  transition: background-color 150ms ease;
}

.play-screen.is-hidden {
  display: none;
}

.setup-screen.is-hidden {
  display: none;
}

.play-topbar,
.play-controls,
.countdown-overlay {
  position: relative;
  z-index: 1;
}

.play-topbar {
  display: grid;
  grid-template-columns: 56px 1fr 56px;
  align-items: center;
  gap: 10px;
}

.timer {
  min-height: 56px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.18);
  color: inherit;
  font-size: clamp(2.1rem, 13vw, 5rem);
  font-variant-numeric: tabular-nums;
  font-weight: 950;
}

.icon-button {
  width: 56px;
  height: 56px;
  border: 0;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.22);
  color: inherit;
  font-size: 2rem;
  font-weight: 900;
  touch-action: manipulation;
}

.color-stage {
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 20px;
  min-height: 0;
  text-align: center;
}

.status-label {
  min-height: 26px;
  margin: 0;
  font-size: 1rem;
  font-weight: 900;
  text-transform: uppercase;
}

.color-stage h2 {
  width: 100%;
  margin: 0;
  padding: 0 8px;
  color: inherit;
  font-size: clamp(4rem, 24vw, 9rem);
  line-height: 0.9;
  font-weight: 1000;
  text-align: center;
}

.stability-circle {
  width: min(58vw, 260px);
  aspect-ratio: 1;
  border: 8px solid rgba(255, 255, 255, 0.78);
  border-radius: 50%;
  background: #84e066;
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.26), inset 0 0 0 10px rgba(255, 255, 255, 0.18);
  transition: background-color 220ms linear;
}

.stability-circle.is-hidden {
  display: none;
}

.tool-stats {
  display: grid;
  gap: 4px;
  min-width: min(100%, 300px);
  margin: -4px 0 0;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.2);
  color: inherit;
  padding: 10px 14px;
  font-size: clamp(1rem, 5vw, 1.45rem);
  font-weight: 900;
  line-height: 1.15;
}

.tool-stats.is-hidden {
  display: none;
}

.total-remaining {
  display: grid;
  gap: 4px;
  min-width: min(100%, 280px);
  margin: -6px 0 2px;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.2);
  color: inherit;
  padding: 10px 14px;
  font-weight: 900;
}

.total-remaining.is-hidden {
  display: none;
}

.total-remaining span {
  font-size: 0.82rem;
  text-transform: uppercase;
}

.total-remaining strong {
  font-size: clamp(1.45rem, 7vw, 2.4rem);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.change-button {
  width: min(100%, 360px);
  min-height: 252px;
  border: 0;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.28);
  color: inherit;
  font-size: clamp(1.35rem, 7vw, 2.2rem);
  font-weight: 950;
  padding: 16px 20px;
  touch-action: manipulation;
}

.change-button.is-hidden {
  display: none;
}

.play-controls {
  display: grid;
}

.control {
  background: rgba(0, 0, 0, 0.28);
  color: inherit;
}

.countdown-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(2px);
}

.countdown-overlay.is-hidden {
  display: none;
}

.countdown-overlay span {
  display: grid;
  place-items: center;
  width: min(48vw, 210px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.34);
  color: inherit;
  font-size: clamp(5rem, 30vw, 11rem);
  font-weight: 1000;
  line-height: 1;
}

.is-finished .change-button,
.is-finished .control,
.is-finished .icon-button,
.is-finished .timer {
  background: rgba(0, 0, 0, 0.34);
}

@media (max-width: 360px) {
  .screen {
    padding-left: 12px;
    padding-right: 12px;
  }

  .action-row,
  .time-fieldset,
  .number-grid {
    gap: 8px;
  }

  .play-topbar {
    grid-template-columns: 48px 1fr 48px;
  }

  .icon-button {
    width: 48px;
    height: 48px;
  }

  .user-row {
    grid-template-columns: 1fr;
  }

  .user-actions {
    grid-template-columns: 1fr 1fr;
  }
}