:root {
  --bg: #0b0f14;
  --panel: #121826;
  --text: #e6e9ef;
  --muted: #9aa4b2;
  --accent: #4da3ff;
  --fast: #4dff88;
  --slow: #ff6b6b;
  --border-radius: 12px;
  --transition: 0.2s ease;
}

* {
  box-sizing: border-box;
}

body {
  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
}

.app {
  max-width: 420px;
  margin: auto;
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-height: 100vh;
}

/* Header */
header {
  display: flex;
  justify-content: flex-end;
  position: absolute;
  top: 6px;
  right: 6px;
  z-index: 10;
}

#menuBtn {
  font-size: 0.9rem;
  padding: 8px 12px;
  border: none;
  border-radius: var(--border-radius);
  background: #1a2133;
  color: var(--text);
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

#menuBtn:hover,
#menuBtn:focus {
  background: #242d42;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

#menuBtn:active {
  transform: translateY(0);
}

/* Timers */
#totalClock {
  text-align: center;
  font-size: 1rem;
  color: var(--muted);
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  transition: var(--transition);
}

#digital {
  text-align: center;
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  transition: color var(--transition);
}

#digital.rest {
  color: var(--accent);
}

/* Canvas with circular glow */
canvas {
  width: 100%;
  aspect-ratio: 1;
  display: block;
  cursor: pointer;
  transition: filter 0.3s ease, transform var(--transition);
  outline: none;
  border-radius: 50%;
  filter: drop-shadow(0 0 0 transparent);
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
}

canvas:hover {
  filter: drop-shadow(0 0 20px rgba(77, 163, 255, 0.3));
}

canvas:focus {
  outline: none;
  filter: drop-shadow(0 0 25px rgba(77, 163, 255, 0.4));
}

canvas:active {
  transform: scale(0.98);
  filter: drop-shadow(0 0 30px rgba(77, 163, 255, 0.5));
}

/* Glow states for interval timer */
canvas.glow-green {
  filter: drop-shadow(0 0 25px rgba(77, 255, 136, 0.6));
}

canvas.glow-blue {
  filter: drop-shadow(0 0 25px rgba(77, 163, 255, 0.6));
}

canvas.glow-yellow {
  filter: drop-shadow(0 0 25px rgba(255, 210, 77, 0.6));
  animation: pulse 1.5s ease-in-out infinite;
}

canvas.glow-gray {
  filter: drop-shadow(0 0 25px rgba(154, 164, 178, 0.5));
}

@keyframes pulse {
  0%, 100% { filter: drop-shadow(0 0 25px rgba(255, 210, 77, 0.6)); }
  50% { filter: drop-shadow(0 0 35px rgba(255, 210, 77, 0.8)); }
}

/* Controls */
.controls-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px;
  gap: 12px;
}

#saveBtn,
#resetBtn,
#toggleRestBtn,
#configIntervalsBtn,
#stopIntervalBtn {
  font-size: 0.85rem;
  padding: 10px 12px;
  border-radius: var(--border-radius);
  border: none;
  background: #1a2133;
  color: var(--text);
  min-height: 44px;
  min-width: 90px;
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
  position: relative;
  overflow: hidden;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
}

#saveBtn:hover,
#resetBtn:hover,
#toggleRestBtn:hover,
#configIntervalsBtn:hover,
#stopIntervalBtn:hover,
#saveBtn:focus,
#resetBtn:focus,
#toggleRestBtn:focus,
#configIntervalsBtn:focus,
#stopIntervalBtn:focus {
  background: #242d42;
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

#saveBtn:active,
#resetBtn:active,
#toggleRestBtn:active,
#configIntervalsBtn:active,
#stopIntervalBtn:active {
  transform: translateY(0);
}

/* Save button hold animation */
#saveBtn.holding::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, rgba(77, 163, 255, 0.3), rgba(77, 163, 255, 0.5));
  animation: resetProgress 0.8s linear forwards;
  z-index: 0;
}

#saveBtn.holding {
  background: #1f2a3a;
  color: #4da3ff;
}

#saveBtn.save-complete {
  background: #4da3ff;
  color: white;
}

/* Reset button hold animation */
#resetBtn.holding::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, rgba(255, 77, 77, 0.3), rgba(255, 77, 77, 0.5));
  animation: resetProgress 0.8s linear forwards;
  z-index: 0;
}

#resetBtn.holding {
  background: #2a1f1f;
  color: #ff6b6b;
}

#resetBtn.reset-complete {
  background: #ff4d4d;
  color: white;
}

@keyframes resetProgress {
  from {
    width: 0;
  }
  to {
    width: 100%;
  }
}

#resetBtn span,
#saveBtn span,
#toggleRestBtn span,
#configIntervalsBtn span,
#stopIntervalBtn span {
  position: relative;
  z-index: 1;
}

/* Lap List */
#list {
  background: var(--panel);
  border-radius: var(--border-radius);
  padding: 10px;
  max-height: 220px;
  overflow: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--muted) var(--panel);
  -webkit-user-select: text;
  -moz-user-select: text;
  user-select: text;
}

#list::-webkit-scrollbar {
  width: 8px;
}

#list::-webkit-scrollbar-track {
  background: var(--panel);
}

#list::-webkit-scrollbar-thumb {
  background: var(--muted);
  border-radius: 4px;
}

#list::-webkit-scrollbar-thumb:hover {
  background: var(--text);
}

.row {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  padding: 6px 12px;
  border-radius: 8px;
  transition: var(--transition);
  font-variant-numeric: tabular-nums;
}

.row:nth-child(odd) {
  background-color: #1a2133;
}

.row:nth-child(even) {
  background-color: #2a333d;
}

.row:hover {
  background-color: #2a3545 !important;
}

.row.rest {
  color: var(--accent);
  font-weight: 500;
}

.delta {
  display: inline-block;
  min-width: 70px;
  margin-right: 12px;
  text-align: right;
  font-weight: 600;
}

.delta.fast {
  color: var(--fast);
}

.delta.slow {
  color: var(--slow);
}

/* Options Panel */
#options {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) scale(0.9);
  opacity: 0;
  pointer-events: none;
  background: var(--panel);
  padding: 28px;
  border-radius: 16px;
  transition: opacity 0.3s ease, transform 0.3s ease;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
  z-index: 200;
  max-height: 85vh;
  max-width: 400px;
  width: calc(100% - 32px);
  overflow-y: auto;
}

#options.open {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
  pointer-events: all;
}

#options h2 {
  margin: 0 0 24px 0;
  font-size: 1.4rem;
  color: var(--text);
  text-align: center;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 12px;
}

.settings-section {
  margin-bottom: 28px;
}

.settings-section h3 {
  margin: 0 0 16px 0;
  font-size: 0.85rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
}

#options label {
  display: flex;
  align-items: center;
  cursor: pointer;
  padding: 12px 16px;
  background: #1a2133;
  border-radius: 8px;
  margin-bottom: 8px;
  transition: var(--transition);
}

#options label:hover {
  background: #242d42;
  transform: translateX(4px);
}

#options input[type="checkbox"] {
  margin-right: 12px;
  width: 22px;
  height: 22px;
  cursor: pointer;
  accent-color: var(--accent);
  flex-shrink: 0;
}

.hand-style-section {
  margin-top: 20px;
}

.hand-style-label {
  margin: 0 0 12px 0;
  font-size: 0.9rem;
  color: var(--text);
  font-weight: 500;
}

.radio-group {
  display: flex;
  gap: 8px;
}

.radio-group-vertical {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.radio-option {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 16px 12px;
  background: #1a2133;
  border: 2px solid #1a2133;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition);
}

.radio-option-horizontal {
  display: flex;
  flex-direction: row;
  align-items: center;
  padding: 12px 16px;
  background: #1a2133;
  border: 2px solid #1a2133;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition);
  gap: 12px;
}

.radio-option:hover,
.radio-option-horizontal:hover {
  background: #242d42;
  border-color: #242d42;
}

.radio-option input[type="radio"] {
  margin: 0 0 8px 0;
  width: 20px;
  height: 20px;
  cursor: pointer;
  accent-color: var(--accent);
}

.radio-option-horizontal input[type="radio"] {
  margin: 0;
  width: 20px;
  height: 20px;
  cursor: pointer;
  accent-color: var(--accent);
  flex-shrink: 0;
}

.radio-option input[type="radio"]:checked ~ .radio-label,
.radio-option-horizontal input[type="radio"]:checked ~ .radio-label {
  color: var(--accent);
  font-weight: 600;
}

.radio-option:has(input[type="radio"]:checked),
.radio-option-horizontal:has(input[type="radio"]:checked) {
  background: #242d42;
  border-color: var(--accent);
}

.radio-label {
  font-size: 0.9rem;
  color: var(--text);
  transition: var(--transition);
  text-align: center;
  flex: 1;
}

#options button {
  margin-top: 20px;
  padding: 14px 24px;
  font-size: 1rem;
  border: none;
  border-radius: var(--border-radius);
  background: var(--accent);
  color: white;
  cursor: pointer;
  transition: var(--transition);
  font-weight: 600;
  width: 100%;
}

#options button:hover,
#options button:focus {
  background: #5db3ff;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(77, 163, 255, 0.4);
}

#options button:active {
  transform: translateY(0);
}

/* Keyboard Shortcuts */
.keyboard-shortcuts {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 2px solid #1a2133;
}

.keyboard-shortcuts h3 {
  margin: 0 0 16px 0;
  font-size: 0.85rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
}

.keyboard-shortcuts ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.keyboard-shortcuts li {
  padding: 10px 16px;
  font-size: 0.9rem;
  background: #1a2133;
  border-radius: 8px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
}

.keyboard-shortcuts kbd {
  display: inline-block;
  padding: 4px 10px;
  background: var(--bg);
  border: 1px solid var(--accent);
  border-radius: 6px;
  font-family: monospace;
  font-size: 0.8rem;
  margin-right: 12px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  color: var(--accent);
  font-weight: 600;
  min-width: 80px;
  text-align: center;
}

.keyboard-shortcuts p {
  margin-top: 16px;
  padding: 12px 16px;
  font-size: 0.85rem;
  color: var(--muted);
  background: #1a2133;
  border-radius: 8px;
  border-left: 3px solid var(--accent);
}

/* Screen Reader Only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus Visible */
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Remove default focus for canvas */
canvas:focus-visible {
  outline: none;
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.row {
  animation: fadeIn 0.3s ease;
}

/* Responsive */
@media (max-width: 375px) {
  #digital {
    font-size: 2.25rem;
  }
  
  #totalClock {
    font-size: 0.9rem;
  }

  #saveBtn,
  #resetBtn,
  #toggleRestBtn,
  #configIntervalsBtn,
  #stopIntervalBtn {
    font-size: 0.8rem;
    min-width: 85px;
    padding: 8px 10px;
  }
  
  .interval-status {
    font-size: 2.25rem;
  }
  
  .interval-status.waiting {
    font-size: 1rem;
  }
}

/* Utility Classes */
.hidden {
  display: none !important;
}

/* Hamburger Menu */
#menu {
  position: fixed;
  right: -100%;
  top: 0;
  bottom: 0;
  width: 280px;
  background: var(--panel);
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.5);
  transition: right 0.3s ease;
  z-index: 200;
  overflow-y: auto;
  padding: 20px;
}

#menu.open {
  right: 0;
}

#menu h2 {
  margin: 0 0 24px 0;
  font-size: 1.3rem;
  color: var(--text);
  border-bottom: 2px solid var(--accent);
  padding-bottom: 12px;
}

.menu-section {
  margin-bottom: 24px;
}

.menu-section h3 {
  margin: 0 0 12px 0;
  font-size: 0.85rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.menu-item {
  width: 100%;
  padding: 12px 16px;
  background: #1a2133;
  border: none;
  border-radius: var(--border-radius);
  color: var(--text);
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
}

.menu-item:hover {
  background: #242d42;
  transform: translateX(4px);
}

.mode-item {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mode-icon {
  font-size: 1.2rem;
}

.mode-label {
  flex: 1;
}

.mode-check {
  color: var(--accent);
  font-weight: bold;
  font-size: 1.1rem;
}

.mode-item.active {
  background: #242d42;
  border: 2px solid var(--accent);
}

.arrow {
  color: var(--muted);
  font-size: 1.2rem;
}

.menu-close {
  width: 100%;
  padding: 12px;
  background: var(--accent);
  border: none;
  border-radius: var(--border-radius);
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  margin-top: 24px;
}

.menu-close:hover {
  background: #5db3ff;
}

/* Menu Overlay */
#menuOverlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 150;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

#menuOverlay.visible {
  opacity: 1;
  pointer-events: all;
}

/* Interval Timer Display */
#intervalDisplay {
  background: var(--panel);
  border-radius: var(--border-radius);
  padding: 16px;
  margin-top: 8px;
}

.interval-status {
  font-size: 3rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.interval-status.countdown {
  color: #9aa4b2;
}

.interval-status.work {
  color: #4dff88;
}

.interval-status.rest {
  color: #4da3ff;
}

.interval-status.paused {
  color: #ffd24d;
}

.interval-status.done {
  color: #4dff88;
}

.interval-status.waiting {
  color: var(--text);
  font-size: 1.2rem;
}

#intervalRounds {
  font-size: 0.9rem;
  color: var(--muted);
  text-align: center;
  margin-bottom: 16px;
}

.config-summary {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--muted);
}

.config-summary div {
  background: #1a2133;
  padding: 8px 12px;
  border-radius: 8px;
}

.config-summary span {
  color: var(--text);
  font-weight: 600;
}

/* Interval Configuration Panel */
#intervalConfigPanel {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) scale(0.9);
  opacity: 0;
  pointer-events: none;
  background: var(--panel);
  padding: 28px;
  border-radius: 16px;
  transition: opacity 0.3s ease, transform 0.3s ease;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
  z-index: 200;
  max-height: 85vh;
  max-width: 400px;
  width: calc(100% - 32px);
  overflow-y: auto;
}

#intervalConfigPanel.open {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
  pointer-events: all;
}

#intervalConfigPanel h2 {
  margin: 0 0 24px 0;
  font-size: 1.4rem;
  color: var(--text);
  text-align: center;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 12px;
}

.config-group {
  margin-bottom: 24px;
}

.config-group > label {
  display: block;
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
}

.input-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.input-group input[type="number"] {
  flex: 1;
  padding: 12px 14px;
  background: #1a2133;
  border: 2px solid transparent;
  border-radius: var(--border-radius);
  color: var(--text);
  font-size: 1rem;
  transition: var(--transition);
}

.input-group input[type="number"]:focus {
  outline: none;
  border-color: var(--accent);
  background: #242d42;
}

.input-group span {
  color: var(--muted);
  font-size: 0.9rem;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  margin-top: 10px;
  padding: 12px 16px;
  background: #1a2133;
  border-radius: 8px;
  transition: var(--transition);
}

.checkbox-label:hover {
  background: #242d42;
}

.checkbox-label input[type="checkbox"] {
  width: 22px;
  height: 22px;
  cursor: pointer;
  accent-color: var(--accent);
}

.volume-control {
  margin-top: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: #1a2133;
  border-radius: 8px;
}

.volume-control label {
  font-size: 0.85rem;
  color: var(--text);
  min-width: 60px;
}

.volume-control input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
}

.volume-control span {
  font-size: 0.85rem;
  color: var(--accent);
  min-width: 45px;
  text-align: right;
  font-weight: 600;
}

.config-buttons {
  display: flex;
  gap: 12px;
  margin-top: 28px;
}

.config-buttons button {
  flex: 1;
  padding: 14px;
  border: none;
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

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

.primary-btn:hover {
  background: #5db3ff;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(77, 163, 255, 0.4);
}

.config-buttons button:not(.primary-btn) {
  background: #1a2133;
  color: var(--text);
  border: 2px solid #242d42;
}

.config-buttons button:not(.primary-btn):hover {
  background: #242d42;
  border-color: var(--muted);
  transform: translateY(-2px);
}