/* ===== BASIC TIMER STYLES ===== */

/* CSS Custom Properties */
:root {
  --color-primary: #667eea;
  --color-secondary: #764ba2;
  --color-success: #48bb78;
  --color-warning: #ed8936;
  --color-danger: #f56565;
  --color-border: #e2e8f0;
  --color-text-primary: #2d3748;
  --color-text-secondary: #718096;
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f7fafc;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --border-radius: 12px;
  --transition: all 0.3s ease;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --color-text-primary: #f7fafc;
  --color-text-secondary: #a0aec0;
  --color-bg-primary: #1a202c;
  --color-bg-secondary: #2d3748;
  --color-border: #4a5568;
}

/* Layout */
.main-container {
  min-height: calc(100vh - 200px);
  padding: 2rem 1rem;
  background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
}

[data-theme="dark"] .main-container {
  background: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);
}

.timer-container {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Timer Display Section */
.timer-display-section {
  background: var(--color-bg-primary);
  border-radius: var(--border-radius);
  padding: 3rem 2rem;
  box-shadow: var(--shadow-lg);
  text-align: center;
  border: 1px solid var(--color-border);
}

.timer-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 2rem;
  text-align: center;
}

/* Circular Timer Display */
.timer-display {
  display: flex;
  justify-content: center;
  margin-bottom: 2rem;
}

.timer-circle {
  position: relative;
  display: inline-block;
}

.progress-ring {
  transform: rotate(-90deg);
  filter: drop-shadow(0 4px 8px rgba(102, 126, 234, 0.3));
}

.progress-ring-bg {
  opacity: 0.2;
}

.progress-ring-progress {
  transition: stroke-dashoffset 1s linear;
  will-change: stroke-dashoffset;
}

.time-display {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-text-primary);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.status-indicator {
  position: absolute;
  top: 60%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  font-weight: 500;
  margin-top: 1rem;
}

/* Time Inputs */
.time-inputs {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.input-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.input-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.input-group input {
  width: 80px;
  height: 60px;
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  font-size: 1.5rem;
  font-weight: 600;
  text-align: center;
  transition: var(--transition);
}

.input-group input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.input-group input:disabled {
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  cursor: not-allowed;
  opacity: 0.6;
}

.input-separator {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  margin: 0 0.5rem;
}

/* Control Buttons */
.timer-controls {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  min-width: 120px;
}

.btn-large {
  padding: 1rem 2rem;
  font-size: 1.125rem;
  min-width: 140px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--color-warning);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
  background: #dd7322;
  transform: translateY(-2px);
}

.btn-outline {
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  border: 2px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

.btn-icon {
  font-size: 1.2em;
}

/* Timer States */
.timer-running .progress-ring-progress {
  stroke: var(--color-success);
}

.timer-paused .progress-ring-progress {
  stroke: var(--color-warning);
}

.timer-completed .progress-ring-progress {
  stroke: var(--color-success);
  animation: pulse-ring 1s infinite;
}

.timer-completed .time-display {
  color: var(--color-success);
  animation: pulse-text 1s infinite;
}

/* Presets Section */
.presets-section {
  background: var(--color-bg-primary);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.section-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 1rem;
  text-align: center;
}

.preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
  gap: 0.75rem;
}

.preset-btn {
  padding: 0.75rem 1rem;
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.preset-btn:hover {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: white;
  transform: translateY(-1px);
}

.preset-btn:active {
  transform: translateY(0);
}

/* Settings Section */
.settings-section {
  background: var(--color-bg-primary);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.settings-toggle {
  width: 100%;
  padding: 1.5rem 2rem;
  border: none;
  background: none;
  color: var(--color-text-primary);
  font-size: 1.125rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition);
}

.settings-toggle:hover {
  background: var(--color-bg-secondary);
}

.settings-toggle[aria-expanded="true"] .toggle-arrow {
  transform: rotate(180deg);
}

.toggle-arrow {
  transition: transform 0.3s ease;
}

.settings-panel {
  padding: 0 2rem 2rem;
  border-top: 1px solid var(--color-border);
}

.settings-header {
  display: flex;
  justify-content: flex-end;
  padding: 1rem 0 0.5rem;
  border-bottom: 1px solid var(--color-border-subtle);
  margin-bottom: 1rem;
}

.settings-close {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: none;
  border: none;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 0.5rem;
  transition: all 0.2s ease;
}

.settings-close:hover,
.settings-close:focus {
  background: var(--color-bg-hover);
  color: var(--color-text-primary);
}

.close-icon {
  font-size: 1.2rem;
  font-weight: bold;
}

.close-text {
  font-weight: 500;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.setting-group h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 1rem;
}

.setting-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.setting-item label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
  color: var(--color-text-primary);
}

.setting-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary);
}

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

.volume-value {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  min-width: 40px;
}

/* Instructions Section */
.instructions-section {
  padding: 4rem 1rem;
  background: var(--color-bg-secondary);
}

.container {
  max-width: 800px;
  margin: 0 auto;
}

.instructions-section h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text-primary);
  text-align: center;
  margin-bottom: 3rem;
}

.instructions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.instruction-item {
  background: var(--color-bg-primary);
  border-radius: var(--border-radius);
  padding: 2rem;
  text-align: center;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.instruction-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.instruction-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.instruction-item h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 1rem;
}

.instruction-item p {
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* Animations */
@keyframes pulse-ring {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

@keyframes pulse-text {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.8; }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

/* Accessibility */
.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;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-primary);
  color: white;
  padding: 8px;
  border-radius: 4px;
  text-decoration: none;
  z-index: 1000;
  transition: top 0.3s;
}

.skip-link:focus {
  top: 6px;
}

/* Responsive Design */
@media (max-width: 768px) {
  .main-container {
    padding: 1rem 0.5rem;
  }
  
  .timer-display-section,
  .presets-section,
  .settings-section {
    padding: 1.5rem 1rem;
  }
  
  .timer-title {
    font-size: 1.75rem;
  }
  
  .time-display {
    font-size: 2.5rem;
  }
  
  .progress-ring {
    width: 240px;
    height: 240px;
  }
  
  .timer-controls {
    flex-direction: column;
    align-items: center;
  }
  
  .btn-large {
    width: 100%;
    max-width: 200px;
  }
  
  .preset-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .instructions-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .time-inputs {
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .input-separator {
    display: none;
  }
  
  .input-group input {
    width: 120px;
  }
  
  .preset-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  .progress-ring-progress {
    stroke-width: 16;
  }
  
  .btn {
    border-width: 3px;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Print Styles */
@media print {
  .main-container {
    background: white;
  }
  
  .settings-section,
  .instructions-section {
    display: none;
  }
  
  .timer-display-section {
    box-shadow: none;
    border: 2px solid black;
  }
}