/* ========================================
   Pomodoro Timer - OBS Overlay Styles
   ======================================== */

:root {
  /* Colors */
  --color-bg: transparent;
  --color-panel-bg: rgba(15, 15, 20, 0.85);
  --color-modal-bg: rgba(20, 22, 30, 0.95);
  --color-overlay-bg: rgba(20, 22, 30, 0.75);
  --color-text: #e8eaed;
  --color-text-muted: #9aa0a6;
  --color-border: rgba(255, 255, 255, 0.08);
  
  /* Phase Colors */
  --color-study: #00D9FF;
  --color-study-glow: rgba(0, 217, 255, 0.3);
  --color-short-break: #4ADE80;
  --color-short-break-glow: rgba(74, 222, 128, 0.3);
  --color-long-break: #FB923C;
  --color-long-break-glow: rgba(251, 146, 60, 0.3);
  --color-finished: #A78BFA;
  --color-finished-glow: rgba(167, 139, 250, 0.3);
  
  /* Current phase (set by JS) */
  --phase-color: var(--color-study);
  --phase-glow: var(--color-study-glow);
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  
  /* Typography */
  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Border radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 50%;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-display);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* App Container */
.app-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
  gap: var(--spacing-md);
  min-height: 100vh;
}

/* ========================================
   Overlay Display
   ======================================== */

.overlay-display {
  background: var(--color-overlay-bg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg) var(--spacing-xl);
  min-width: 340px;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.overlay-display::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--phase-color);
  transition: background 0.3s ease;
}

.overlay-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
}

.phase-label {
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--phase-color);
  transition: color 0.3s ease;
}

.session-counter {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.timer-display {
  font-family: var(--font-mono);
  font-size: 4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--color-text);
  text-shadow: 0 0 40px var(--phase-glow);
  transition: text-shadow 0.3s ease;
  margin-top: var(--spacing-xs);
}

/* Phase-specific styles */
.overlay-display.phase-study {
  --phase-color: var(--color-study);
  --phase-glow: var(--color-study-glow);
}

.overlay-display.phase-shortBreak {
  --phase-color: var(--color-short-break);
  --phase-glow: var(--color-short-break-glow);
}

.overlay-display.phase-longBreak {
  --phase-color: var(--color-long-break);
  --phase-glow: var(--color-long-break-glow);
}

.overlay-display.phase-finished {
  --phase-color: var(--color-finished);
  --phase-glow: var(--color-finished-glow);
}

/* Glass OFF mode */
.overlay-display.glass-off {
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border: none;
  box-shadow: none;
}

.overlay-display.glass-off::before {
  display: none;
}

.overlay-display.glass-off .phase-label {
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.8);
}

.overlay-display.glass-off .session-counter {
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.8);
}

.overlay-display.glass-off .timer-display {
  text-shadow: 
    0 0 40px var(--phase-glow),
    0 2px 10px rgba(0, 0, 0, 0.9);
}

/* Phase change animation */
@keyframes phaseFlash {
  0%, 100% { 
    transform: scale(1);
    filter: brightness(1);
  }
  50% { 
    transform: scale(1.02);
    filter: brightness(1.15);
  }
}

.overlay-display.phase-change {
  animation: phaseFlash 0.4s ease-out;
}

/* Running state pulse */
@keyframes timerPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.85; }
}

.overlay-display.is-running .timer-display {
  animation: timerPulse 2s ease-in-out infinite;
}

/* ========================================
   Icon Controls
   ======================================== */

.icon-controls {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
}

.icon-btn {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-panel-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text);
  border-color: rgba(255, 255, 255, 0.15);
}

.icon-btn:active {
  transform: scale(0.95);
}

.icon-btn-icon {
  font-size: 1.25rem;
  line-height: 1;
}

.icon-btn-primary {
  background: var(--color-study);
  border-color: var(--color-study);
  color: #0f0f14;
}

.icon-btn-primary:hover {
  background: var(--color-study);
  filter: brightness(1.15);
  color: #0f0f14;
}

/* ========================================
   Modal
   ======================================== */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-modal-bg);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 420px;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform: scale(0.95) translateY(10px);
  transition: transform 0.25s ease;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.modal-backdrop.open .modal {
  transform: scale(1) translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.modal-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}

.modal-close {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text);
}

/* Modal Tabs */
.modal-tabs {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  padding: 0 var(--spacing-md);
}

.tab-btn {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-md);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--color-text-muted);
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  margin-bottom: -1px;
}

.tab-btn:hover {
  color: var(--color-text);
}

.tab-btn.active {
  color: var(--color-study);
  border-bottom-color: var(--color-study);
}

/* Modal Content */
.modal-content {
  padding: var(--spacing-lg);
  overflow-y: auto;
  flex: 1;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

/* ========================================
   Settings Grid (in Modal)
   ======================================== */

.settings-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
}

.setting-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.setting-group.full-width {
  grid-column: span 2;
}

.setting-group label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.setting-group input {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--color-text);
  transition: border-color 0.2s, box-shadow 0.2s;
  width: 100%;
}

.setting-group input:focus {
  outline: none;
  border-color: var(--color-study);
  box-shadow: 0 0 0 3px var(--color-study-glow);
}

.input-suffix {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.input-suffix input {
  width: 80px;
  flex-shrink: 0;
}

.input-suffix span {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ========================================
   Toggle Settings (in Modal)
   ======================================== */

.settings-toggles {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.toggle-setting {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  cursor: pointer;
  padding: var(--spacing-sm) 0;
}

.toggle-setting input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: relative;
  width: 44px;
  height: 24px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  transition: background 0.2s ease;
  flex-shrink: 0;
}

.toggle-slider::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  background: var(--color-text-muted);
  border-radius: 50%;
  transition: transform 0.2s ease, background 0.2s ease;
}

.toggle-setting input:checked + .toggle-slider {
  background: var(--color-study);
}

.toggle-setting input:checked + .toggle-slider::after {
  transform: translateX(20px);
  background: #0f0f14;
}

.toggle-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
}

/* ========================================
   OBS Section (in Modal)
   ======================================== */

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}

.obs-section,
.advanced-section,
.danger-section {
  margin-bottom: var(--spacing-lg);
}

.danger-section {
  margin-bottom: 0;
}

.obs-url-field {
  display: flex;
  gap: var(--spacing-sm);
}

.obs-url-field input {
  flex: 1;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--color-text-muted);
  min-width: 0;
}

.obs-url-field input:focus {
  outline: none;
  border-color: var(--color-study);
}

.obs-url-hint {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: var(--spacing-xs);
}

.action-buttons {
  display: flex;
  gap: var(--spacing-sm);
}

/* ========================================
   Buttons
   ======================================== */

.btn {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.btn:active {
  transform: scale(0.98);
}

.btn-ghost {
  flex: 1;
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text);
}

.btn-copy {
  background: var(--color-study);
  color: #0f0f14;
  padding: var(--spacing-sm) var(--spacing-md);
  white-space: nowrap;
  min-width: 60px;
}

.btn-copy:hover {
  filter: brightness(1.1);
}

.btn-copy.copied {
  background: var(--color-short-break);
}

.btn-danger {
  width: 100%;
  background: rgba(239, 68, 68, 0.15);
  color: #EF4444;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.25);
}

/* ========================================
   Overlay Controls (for overlay mode)
   ======================================== */

.overlay-controls {
  display: none;
  gap: var(--spacing-sm);
  justify-content: center;
  margin-top: var(--spacing-sm);
}

.overlay-ctrl-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  line-height: 1;
  padding: 0;
}

.overlay-ctrl-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  color: var(--color-text);
  border-color: rgba(255, 255, 255, 0.2);
}

.overlay-ctrl-btn:active {
  transform: scale(0.92);
  background: rgba(255, 255, 255, 0.1);
}

/* Glass-off mode for overlay controls */
.overlay-display.glass-off .overlay-ctrl-btn {
  background: rgba(0, 0, 0, 0.4);
  border-color: rgba(255, 255, 255, 0.15);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8);
}

.overlay-display.glass-off .overlay-ctrl-btn:hover {
  background: rgba(0, 0, 0, 0.5);
  border-color: rgba(255, 255, 255, 0.25);
}

/* ========================================
   Overlay Mode
   ======================================== */

body.overlay-mode {
  background: transparent;
  min-height: auto;
}

body.overlay-mode .app-container {
  padding: 0;
  min-height: auto;
}

body.overlay-mode .icon-controls,
body.overlay-mode .modal-backdrop {
  display: none;
}

body.overlay-mode .overlay-controls {
  display: flex !important;
  pointer-events: auto;
}

body.overlay-mode .overlay-display {
  border-radius: var(--radius-md);
  min-width: auto;
  width: 100%;
}

/* ========================================
   Responsive Adjustments
   ======================================== */

@media (max-width: 480px) {
  .settings-grid {
    grid-template-columns: 1fr;
  }
  
  .setting-group.full-width {
    grid-column: span 1;
  }
  
  .timer-display {
    font-size: 3rem;
  }
  
  .overlay-display {
    min-width: 280px;
    padding: var(--spacing-md) var(--spacing-lg);
  }
  
  .modal {
    max-width: 100%;
    margin: var(--spacing-sm);
  }
}

/* Compact overlay sizing (400x160) */
@media (max-height: 200px) {
  .overlay-display {
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .phase-label {
    font-size: 0.75rem;
  }
  
  .session-counter {
    font-size: 0.6875rem;
  }
  
  .timer-display {
    font-size: 2.5rem;
  }
  
  .overlay-controls {
    margin-top: var(--spacing-xs);
    gap: var(--spacing-xs);
  }
  
  .overlay-ctrl-btn {
    width: 28px;
    height: 28px;
    font-size: 0.75rem;
  }
}

/* Ultra compact */
@media (max-height: 140px) {
  .overlay-content {
    gap: 0;
  }
  
  .timer-display {
    font-size: 2rem;
    margin-top: 0;
  }
  
  .phase-label {
    font-size: 0.6875rem;
  }
  
  .overlay-controls {
    margin-top: 2px;
  }
  
  .overlay-ctrl-btn {
    width: 24px;
    height: 24px;
    font-size: 0.625rem;
  }
}