:root {
  --bg: var(--tg-theme-bg-color, #ffffff);
  --text: var(--tg-theme-text-color, #000000);
  --hint: var(--tg-theme-hint-color, #999999);
  --button: var(--tg-theme-button-color, #2481cc);
  --button-text: var(--tg-theme-button-text-color, #ffffff);
  --secondary-bg: var(--tg-theme-secondary-bg-color, #f4f4f5);
  --accent: var(--tg-theme-button-color, #2481cc);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding-bottom: env(safe-area-inset-bottom, 0);
}

#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-header {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 200;
  padding: 8px;
}

.settings-btn {
  background: none;
  border: none;
  font-size: 22px;
  cursor: pointer;
  padding: 6px;
  opacity: 0.6;
  transition: opacity 0.2s;
}

.settings-btn:hover {
  opacity: 1;
}

main {
  flex: 1;
  padding: 16px;
  padding-top: 44px;
  padding-bottom: 80px;
  overflow-y: auto;
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: flex-end;
  z-index: 3000;
}

.modal.hidden {
  display: none;
}

.modal-box {
  width: 100%;
  background: var(--bg);
  border-radius: 16px 16px 0 0;
  padding: 24px;
  padding-bottom: calc(24px + env(safe-area-inset-bottom, 0));
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.modal-box h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.btn-danger {
  width: 100%;
  padding: 14px;
  background: #ff3b30;
  color: #fff;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  cursor: pointer;
}

.btn-secondary {
  width: 100%;
  padding: 14px;
  background: var(--secondary-bg);
  color: var(--text);
  border: none;
  border-radius: 12px;
  font-size: 16px;
  cursor: pointer;
}

.tab-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  background: var(--secondary-bg);
  padding: 8px;
  padding-bottom: calc(8px + env(safe-area-inset-bottom, 0));
  border-top: 1px solid var(--hint);
  z-index: 100;
}

.tab {
  flex: 1;
  padding: 12px 8px;
  border: none;
  background: transparent;
  color: var(--hint);
  font-size: 14px;
  cursor: pointer;
  transition: color 0.2s;
}

.tab.active {
  color: var(--accent);
  font-weight: 600;
}

.screen {
  display: none;
}

.screen.active {
  display: block;
}

.btn-metric {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 16px;
  margin-bottom: 12px;
  border: none;
  border-radius: 12px;
  background: var(--secondary-bg);
  color: var(--text);
  font-size: 16px;
  text-align: left;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-metric:hover, .btn-metric:active {
  background: color-mix(in srgb, var(--accent) 15%, transparent);
}

.btn-scale {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin: 4px;
  border: 2px solid var(--secondary-bg);
  border-radius: 12px;
  background: var(--secondary-bg);
  color: var(--text);
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-scale.selected {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 20%, transparent);
  color: var(--accent);
}

.input-comment {
  width: 100%;
  margin-top: 16px;
  padding: 12px;
  border: 1px solid var(--hint);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
}

.input-temp {
  width: 100%;
  padding: 16px;
  font-size: 24px;
  text-align: center;
  border: 2px solid var(--secondary-bg);
  border-radius: 12px;
  background: var(--bg);
  color: var(--text);
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 0;
  margin-bottom: 16px;
  border: none;
  background: none;
  color: var(--accent);
  font-size: 16px;
  cursor: pointer;
}

#toast-container {
  position: fixed;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  pointer-events: none;
}

.toast {
  padding: 12px 24px;
  background: var(--text);
  color: var(--bg);
  border-radius: 12px;
  font-size: 14px;
  white-space: nowrap;
  animation: toast-in 0.3s ease;
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

#error-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

#error-overlay.hidden {
  display: none;
}

.error-box {
  margin: 24px;
  padding: 24px;
  background: var(--bg);
  border-radius: 16px;
  max-width: 320px;
  text-align: center;
}

.error-box p {
  margin: 0 0 16px;
}

.error-box button {
  padding: 12px 24px;
  background: var(--button);
  color: var(--button-text);
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
}

.sleep-card {
  padding: 20px;
  margin-bottom: 16px;
  background: var(--secondary-bg);
  border-radius: 16px;
}

.sleep-card h3 {
  margin: 0 0 12px;
  font-size: 18px;
}

.sleep-card .meta {
  color: var(--hint);
  font-size: 14px;
  margin-bottom: 8px;
}

.stars {
  font-size: 24px;
  letter-spacing: 4px;
}

.timer {
  font-size: 28px;
  font-weight: 600;
  margin: 16px 0;
}

.stub {
  text-align: center;
  padding: 48px 24px;
  color: var(--hint);
}

.timeline-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--secondary-bg);
}

.timeline-item .icon {
  font-size: 24px;
  flex-shrink: 0;
}

.timeline-item .content {
  flex: 1;
  min-width: 0;
}

.timeline-item .time {
  font-size: 12px;
  color: var(--hint);
}

.timeline-item .comment {
  font-size: 14px;
  color: var(--hint);
  margin-top: 4px;
}

.timeline-item .edit-btn {
  flex-shrink: 0;
  background: none;
  border: none;
  font-size: 16px;
  cursor: pointer;
  padding: 4px 8px;
  opacity: 0.4;
  transition: opacity 0.2s;
  align-self: center;
}

.timeline-item .edit-btn:hover,
.timeline-item .edit-btn:active {
  opacity: 1;
}

.btn-primary {
  width: 100%;
  padding: 14px;
  background: var(--button);
  color: var(--button-text);
  border: none;
  border-radius: 12px;
  font-size: 16px;
  cursor: pointer;
}

.tab-switcher {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.tab-switcher button {
  padding: 8px 16px;
  border: 1px solid var(--hint);
  border-radius: 8px;
  background: var(--secondary-bg);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
}

.tab-switcher button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--button-text);
}

.summary-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.summary-table th,
.summary-table td {
  padding: 12px 8px;
  text-align: left;
  border-bottom: 1px solid var(--secondary-bg);
}

.summary-table th {
  color: var(--hint);
  font-weight: 500;
}

.hidden {
  display: none !important;
}

.quality-btns {
  display: flex;
  gap: 8px;
  margin: 16px 0;
  flex-wrap: wrap;
}

.quality-btns button {
  flex: 1;
  min-width: 48px;
  padding: 12px;
  border: 2px solid var(--secondary-bg);
  border-radius: 12px;
  background: var(--secondary-bg);
  color: var(--text);
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
}

.quality-btns button.selected {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 20%, transparent);
}