/* Warm Dark Mode Design System */
:root {
  /* Colors */
  --bg-primary: #1a1a1a;
  --bg-panel: #242424;
  --bg-card: #2d2d2d;
  --bg-card-hover: #363636;

  --text-primary: #e8e8e8;
  --text-muted: #a0a0a0;
  --text-dimmed: #6a6a6a;

  --accent: #ff8c42;
  --accent-hover: #ff9f5e;
  --success: #48bb78;
  --border: #3a3a3a;

  --timer-display: #ffd89b;
  --terminal-green: #4af626;

  /* Timer Color Options - Dark Mode */
  --timer-color-beige: #ffd89b;
  --timer-color-green: #4af626;
  --timer-color-orange: #ff5722;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "Monaco", "Menlo", "Courier New", monospace;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;

  /* Transitions */
  --transition-fast: 100ms ease;
  --transition-normal: 200ms ease;
  --transition-slide: 300ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Shadows */
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-button: 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-panel: 2px 0 8px rgba(0, 0, 0, 0.4);

  /* Timer Sizes */
  --timer-size-medium: 7.5rem;
  --timer-size-large: 10rem;
  --timer-size-xl: 13rem;
}

/* Light Mode Design System */
body[data-theme="light"] {
  /* Colors */
  --bg-primary: #f5f5f5;
  --bg-panel: #ffffff;
  --bg-card: #fafafa;
  --bg-card-hover: #f0f0f0;

  --text-primary: #1a1a1a;
  --text-muted: #666666;
  --text-dimmed: #999999;

  --accent: #ff8c42;
  --accent-hover: #ff7a2e;
  --success: #48bb78;
  --border: #e0e0e0;

  --timer-display: #000000;
  --terminal-green: #16a34a;

  /* Timer Color Options - Light Mode */
  --timer-color-beige: #000000;
  --timer-color-green: #15803d;
  --timer-color-orange: #ff5722;

  /* Shadows */
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-button: 0 2px 4px rgba(0, 0, 0, 0.08);
  --shadow-panel: 2px 0 8px rgba(0, 0, 0, 0.1);
}

/* High Contrast Accessibility Mode (WCAG AAA compliant) */
body[data-theme="high-contrast"] {
  /* Colors - Maximum Contrast (no grays) */
  --bg-primary: #ffffff;
  --bg-panel: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f0f0f0;

  --text-primary: #000000;
  --text-muted: #000000;
  --text-dimmed: #000000;

  --accent: #0066cc;
  --accent-hover: #0052a3;
  --success: #008000;
  --border: #000000;

  --timer-display: #000000;
  --terminal-green: #008000;

  /* Timer Color Options - High Contrast */
  --timer-color-beige: #000000;
  --timer-color-green: #008000;
  --timer-color-orange: #cc0000;

  /* Shadows - More pronounced */
  --shadow-card: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-button: 0 2px 6px rgba(0, 0, 0, 0.3);
  --shadow-panel: 3px 0 10px rgba(0, 0, 0, 0.3);
}

/* High Contrast - Enhanced borders and weights */
body[data-theme="high-contrast"] .left-panel {
  border-right: 3px solid var(--border);
}

body[data-theme="high-contrast"] button {
  border-width: 2px;
  font-weight: 700;
}

body[data-theme="high-contrast"] .countdown {
  font-weight: 900;
}

body[data-theme="high-contrast"] input,
body[data-theme="high-contrast"] textarea {
  border: 2px solid var(--border) !important;
  font-weight: 600;
}

body[data-theme="high-contrast"] .color-square {
  border: 2px solid var(--border);
}

body[data-theme="high-contrast"] .panel-menu-btn,
body[data-theme="high-contrast"] .panel-end-session-btn {
  border: 2px solid var(--border);
}

body[data-theme="high-contrast"] .modal-content {
  border: 3px solid var(--border);
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-mono);
  color: var(--text-primary);
  background: var(--bg-primary);
  line-height: 1.6;
  letter-spacing: 0;
  overflow: hidden;
  transition:
    background-color 0.3s ease,
    color 0.3s ease;
}

/* Main Layout - Split Panel */
.app-container {
  display: grid;
  grid-template-columns: 500px 1fr;
  height: 100vh;
  position: relative;
  transition: grid-template-columns var(--transition-slide);
}

.app-container[data-panel-state="collapsed"] {
  grid-template-columns: 0 1fr;
}

/* Left Panel */
.left-panel {
  background: var(--bg-panel);
  box-shadow: var(--shadow-panel);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-y: overlay; /* WebKit: scrollbar floats over content, takes no space */
  scrollbar-width: thin; /* Firefox */
  scrollbar-color: transparent transparent; /* Firefox: hidden by default */
  position: relative;
  transform: translateX(0);
  transition: transform var(--transition-slide);
  z-index: 100;
  min-width: 320px;
}

.left-panel:hover {
  scrollbar-color: rgba(255, 255, 255, 0.15) transparent; /* Firefox: show on hover */
}

.left-panel::-webkit-scrollbar {
  width: 5px;
}

.left-panel::-webkit-scrollbar-track {
  background: transparent;
}

.left-panel::-webkit-scrollbar-thumb {
  background: transparent;
  border-radius: 3px;
  transition: background 0.2s;
}

.left-panel:hover::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
}

.left-panel::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}

.app-container[data-panel-state="collapsed"] .left-panel {
  transform: translateX(-100%);
}

.panel-content {
  padding: var(--spacing-lg);
}

/* Panel Views */
.panel-view {
  min-height: calc(100vh - 6rem);
  overflow-y: auto;
}

.panel-view .panel-header {
  margin-bottom: var(--spacing-lg);
}

/* Help Panel */
.help-content {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
}

.help-section {
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border);
}

.help-section:last-child {
  border-bottom: none;
}

.help-section h3 {
  font-size: 0.875rem;
  color: var(--terminal-green);
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.help-section p {
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  padding-left: 1rem;
}

.help-section p::before {
  content: "> ";
  color: var(--text-dimmed);
  margin-left: -1rem;
  margin-right: 0.25rem;
}

.help-section kbd {
  background: var(--bg-card);
  padding: 0.125rem 0.375rem;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  border: 1px solid var(--border);
  color: var(--accent);
}

/* Settings Panel */
.settings-content {
  font-family: var(--font-mono);
}

.settings-section {
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border);
}

.settings-section:last-child {
  border-bottom: none;
}

.settings-section h3 {
  font-size: 0.875rem;
  color: var(--terminal-green);
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.setting-item {
  margin-bottom: var(--spacing-md);
}

.setting-item > label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-dimmed);
  margin-bottom: var(--spacing-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.setting-item label input[type="checkbox"] {
  margin-right: 0.5rem;
  accent-color: var(--terminal-green);
}

.setting-item select {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  padding: 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.setting-item select:focus {
  outline: none;
  border-color: var(--accent);
}

.setting-item select:hover {
  border-color: var(--text-muted);
}

.restore-defaults-btn {
  width: 100%;
  background: none;
  border: 1px solid var(--text-dimmed);
  color: var(--text-dimmed);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.75rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.restore-defaults-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Panel Footer Navigation */
.panel-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 500px;
  background: var(--bg-panel);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-around;
  padding: 0.5rem;
  z-index: 102;
  transition: transform var(--transition-slide);
}

.app-container[data-panel-state="collapsed"] .panel-footer {
  transform: translateX(-100%);
}

.footer-nav-btn {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-dimmed);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.5rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  transition: color var(--transition-fast);
}

.footer-nav-btn:hover {
  color: var(--text-primary);
}

.footer-nav-btn.active {
  color: var(--terminal-green);
}

.footer-nav-btn .nav-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.25rem;
  height: 1.25rem;
}

.footer-nav-btn .nav-icon svg {
  width: 100%;
  height: 100%;
}

.inline-icon {
  display: inline-block;
  vertical-align: -0.15em;
}

.footer-nav-btn .nav-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Panel Control Buttons */
.panel-close-btn {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--spacing-xs);
  opacity: 1;
  transition:
    opacity var(--transition-normal),
    color var(--transition-fast);
  z-index: 101;
}

.app-container[data-panel-state="collapsed"] .panel-close-btn {
  opacity: 0;
  pointer-events: none;
}

.panel-close-btn:hover {
  color: var(--text-primary);
}

.panel-menu-btn {
  position: fixed;
  top: var(--spacing-sm);
  left: var(--spacing-sm);
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 6px;
  width: 3rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition:
    opacity var(--transition-normal),
    background var(--transition-fast);
  z-index: 99;
}

.app-container[data-panel-state="collapsed"] .panel-menu-btn {
  opacity: 1;
  pointer-events: all;
}

.panel-menu-btn:hover {
  background: var(--bg-card-hover);
}

/* Right Panel */
.right-panel {
  background: linear-gradient(
    135deg,
    var(--bg-primary) 0%,
    var(--bg-panel) 100%
  );
  position: relative;
  transition: all var(--transition-slide);
  overflow: hidden;
}

.timer-content {
  text-align: center;
  padding: var(--spacing-lg);
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* Section Titles - Terminal Style */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-sm);
  margin-right: 2rem;
}

.section-title {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text-dimmed);
  margin-bottom: 0;
  border: none;
  padding-bottom: 0;
  font-family: var(--font-mono);
}

/* Color Picker */
.color-picker {
  display: flex;
  gap: 0.375rem;
  align-items: center;
}

.color-square {
  width: 1rem;
  height: 1rem;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all var(--transition-fast);
  padding: 0;
  position: relative;
}

.color-square:hover {
  transform: scale(1.1);
  border-color: var(--text-primary);
}

.color-square.active::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 0.35rem;
  height: 0.35rem;
  background: #000;
  border-radius: 50%;
  pointer-events: none;
}

.color-square[data-color="beige"] {
  background: var(--timer-color-beige);
}

.color-square[data-color="green"] {
  background: var(--timer-color-green);
}

.color-square[data-color="orange"] {
  background: var(--timer-color-orange);
}

/* Setup Section */
.setup-section {
  margin-bottom: var(--spacing-lg);
}

/* Duration Inputs - Terminal Style */
.duration-section {
  display: grid;
  grid-template-columns: auto auto;
  gap: var(--spacing-lg);
  margin-bottom: 0;
}

.duration-input label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-dimmed);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-xs);
}

.duration-control {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.duration-control input {
  background: none;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 140px; /* 28% of 500px panel width */
  font-weight: 200;
  text-align: left;
  width: 2ch;
  max-width: 2ch;
  outline: none;
  pointer-events: none;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  -moz-appearance: textfield;
}

.duration-control input::-webkit-outer-spin-button,
.duration-control input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.duration-buttons {
  display: flex;
  flex-direction: column;
  gap: 0;
  align-items: center;
  justify-content: flex-end;
  padding-left: 0.25rem;
}

.duration-arrow {
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 3rem;
  font-weight: 400;
  width: auto;
  height: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  line-height: 1;
  padding: 0;
}

.duration-arrow:hover {
  color: var(--accent);
}

.duration-arrow:active {
  transform: scale(0.95);
}

.app-container[data-session-locked="true"] .duration-control {
  opacity: 0.6;
  pointer-events: none;
}

/* Participants Section - Terminal Style */
.participants-section {
  margin-bottom: var(--spacing-lg);
}

.participants-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
}

.participants-header h3 {
  font-size: 0.85rem;
  color: var(--text-dimmed);
  font-weight: 600;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.add-participant {
  background: none;
  border: none;
  color: var(--terminal-green);
  width: 1.5rem;
  height: 1.5rem;
  font-size: 1rem;
  font-family: var(--font-mono);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.add-participant:hover {
  color: var(--accent);
}

.participants-list {
  list-style: none;
}

.participant-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
  font-family: var(--font-mono);
}

.participant-item .bullet {
  color: var(--terminal-green);
  font-size: 0.875rem;
}

.participant-item .bullet::before {
  content: ">";
}

.participant-item input {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  padding: 0.25rem 0;
  outline: none;
}

.participant-item input:focus {
  color: var(--terminal-green);
}

.participant-item input::placeholder {
  color: var(--text-dimmed);
  font-style: italic;
}

.remove-participant {
  background: none;
  border: none;
  color: var(--text-dimmed);
  font-size: 0.875rem;
  font-family: var(--font-mono);
  cursor: pointer;
  opacity: 0;
  transition: all var(--transition-fast);
  padding: 0 0.25rem;
}

.participant-item:hover .remove-participant {
  opacity: 1;
}

.remove-participant:hover {
  color: #ef4444;
}

.github-indicator {
  font-size: 0.875rem;
  font-family: var(--font-mono);
  min-width: 1.5rem;
  text-align: center;
}

.app-container[data-session-locked="true"] .participants-section {
  pointer-events: none;
}

.app-container[data-session-locked="true"] .add-participant {
  display: none;
}

.app-container[data-session-locked="true"] .remove-participant {
  display: none;
}

/* Goal Section - Terminal Style */
.goal-section {
  margin-bottom: var(--spacing-lg);
}

.goal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xs);
}

.goal-section label {
  font-size: 0.85rem;
  color: var(--text-dimmed);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.github-issue-link-header {
  font-size: 0.75rem;
  color: var(--text-dimmed);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
  transition: color 0.2s ease;
}

.github-issue-link-header:hover {
  color: var(--text-primary);
}

.goal-section textarea {
  width: 100%;
  background: none;
  border: none;
  border-left: 2px solid var(--terminal-green);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  padding: 0.5rem 0 0.5rem 0.75rem;
  resize: vertical;
  outline: none;
  line-height: 1.5;
}

.goal-section textarea:focus {
  color: var(--terminal-green);
  border-left-color: var(--accent);
}

.goal-section textarea::placeholder {
  color: var(--text-dimmed);
  font-style: italic;
}

.app-container[data-session-locked="true"] .goal-section textarea {
  opacity: 0.6;
  pointer-events: none;
}

/* Start Button Section - Terminal Style */
.start-button-section {
  /* margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-lg); */
  border-bottom: 1px solid var(--border);
}

.start-btn {
  width: 100%;
  background: none;
  border: 1px solid var(--terminal-green);
  color: var(--terminal-green);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.75rem 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.start-btn:hover:not(:disabled) {
  background: var(--terminal-green);
  color: var(--bg-primary);
}

.start-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* End Session Button - Terminal Style */
.end-session-btn {
  width: 100%;
  background: none;
  border: 1px solid #ef4444;
  color: #ef4444;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.75rem 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
}

.end-session-btn:hover {
  background: #ef4444;
  color: var(--bg-primary);
}

.share-session-btn {
  width: 100%;
  background: none;
  border: 1px solid var(--text-dimmed);
  color: var(--text-dimmed);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.75rem 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
}

.share-session-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Panel End Session Button (below hamburger menu) */
.panel-end-session-btn {
  position: fixed;
  top: 4.5rem;
  left: var(--spacing-sm);
  background: var(--bg-card);
  border: 1px solid #d97706;
  color: #d97706;
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 6px;
  width: 3rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    opacity var(--transition-normal),
    background var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast);
  z-index: 99;
}

.panel-end-session-btn:hover {
  background: #d97706;
  border-color: #d97706;
  color: var(--bg-primary);
}

/* Recent Sessions Section - Terminal Log Style */
.recent-sessions-section {
  border-top: 1px solid var(--border);
  padding-top: var(--spacing-lg);
}

.session-cards {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.session-card {
  background: none;
  border: none;
  border-radius: 0;
  padding: 0.25rem 0;
  transition:
    background var(--transition-fast),
    transform var(--transition-fast),
    opacity var(--transition-fast);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--text-muted);
  position: relative;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.session-card:hover {
  background: rgba(74, 246, 38, 0.05);
}

.session-card:active {
  transform: scale(0.98);
}

.session-header {
  display: flex;
  gap: 0.5rem;
  align-items: flex-start;
  margin-bottom: 0;
}

.session-time {
  font-size: 0.75rem;
  color: var(--text-dimmed);
  font-family: var(--font-mono);
  white-space: nowrap;
}

.session-like {
  background: none;
  border: none;
  color: var(--text-dimmed);
  cursor: pointer;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  transition: color var(--transition-fast);
  padding: 0;
  margin-left: 0.5rem;
}

.session-like:hover {
  color: #ef4444;
}

.session-like.liked {
  color: #ef4444;
}

.session-participants {
  display: none; /* Hidden - participant names now shown in goal text */
}

.session-goal {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-primary);
  font-weight: 400;
  display: inline;
  margin: 0;
}

.participant-name {
  color: var(--accent);
  font-weight: 500;
}

.session-accomplishment {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--accent);
  display: inline;
  margin-left: 0.5rem;
}

.like-btn {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-dimmed);
  background: none;
  border: none;
  padding: 0;
  margin-left: 0.5rem;
  cursor: pointer;
  transition: color 0.2s ease;
  display: inline;
}

.like-btn.like-btn-active {
  color: #ef4444;
}

.like-btn:hover {
  color: #ef4444;
}

.like-btn.liked {
  color: #ef4444;
  cursor: default;
}

.empty-state {
  text-align: left;
  padding: 0.5rem 0;
  color: var(--text-dimmed);
  font-size: 0.75rem;
  font-family: var(--font-mono);
}

/* Timer Display */
/* DateTime Display */
.datetime-display {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  color: var(--text-muted);
  font-family: var(--font-mono);
  text-align: right;
  line-height: 1.4;
}

/* Individual date and time spans inherit font-size from inline styles */
.datetime-display span {
  transition: font-size var(--transition-normal);
}

.timer-display {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: transform var(--transition-normal);
}

/* Timer rotation states - combined with centering transform */
body[data-timer-rotation="0"] .timer-display {
  transform: translate(-50%, -50%) rotate(0deg);
}

body[data-timer-rotation="90"] .timer-display {
  transform: translate(-50%, -50%) rotate(90deg);
}

body[data-timer-rotation="180"] .timer-display {
  transform: translate(-50%, -50%) rotate(180deg);
}

body[data-timer-rotation="270"] .timer-display {
  transform: translate(-50%, -50%) rotate(270deg);
}

.timer-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-xs);
}

.countdown {
  font-size: var(--timer-size-medium); /* Default */
  font-weight: 700;
  line-height: 1;
  color: var(--timer-display);
  font-variant-numeric: tabular-nums;
  font-family: var(--font-mono);
  transition:
    font-size var(--transition-normal),
    color var(--transition-normal);
}

/* Timer size variants via data attribute */
body[data-timer-size="medium"] .countdown {
  font-size: var(--timer-size-medium);
}

body[data-timer-size="large"] .countdown {
  font-size: var(--timer-size-large);
}

body[data-timer-size="xl"] .countdown {
  font-size: var(--timer-size-xl);
}

/* Timer Controls */
.timer-controls {
  position: absolute;
  bottom: var(--spacing-md);
  right: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  z-index: 100;
  pointer-events: auto;
}

.timer-size-controls {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.size-btn {
  background: none;
  border: 1px solid transparent;
  border-radius: 50%;
  color: var(--text-dimmed);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.5rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.size-btn.active {
  border: 1px dotted var(--text-muted);
  color: var(--text-primary);
}

.rotate-btn {
  background: none;
  border: none;
  color: var(--text-dimmed);
  font-size: 1.75rem;
  cursor: pointer;
  padding: 0.25rem;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.session-info {
  position: absolute;
  bottom: var(--spacing-lg);
  left: 50%;
  transform: translateX(-50%);
  max-width: 600px;
  width: calc(100% - var(--spacing-lg) * 2);
}

.session-participants {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: var(--spacing-xs);
}

.session-goal-display {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* GitHub Issue Links */
.github-issue-link {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast);
}

.github-issue-link:hover {
  border-bottom-color: var(--accent);
}

/* In session goal display (right panel) */
.session-goal-display .github-issue-link {
  color: var(--accent);
  font-weight: 600;
}

/* In session history cards */
.session-goal .github-issue-link {
  color: var(--text-primary);
  text-decoration: none;
}

/* Modal Overlay */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn var(--transition-normal);
}

.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: var(--spacing-lg);
  max-width: 500px;
  width: 90%;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.modal-content h2 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.modal-content label {
  display: block;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: var(--spacing-xs);
}

.modal-content textarea {
  width: 100%;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 1rem;
  padding: var(--spacing-sm);
  resize: vertical;
  outline: none;
  margin-bottom: var(--spacing-md);
}

.modal-content textarea:focus {
  border-color: var(--accent);
}

.primary-btn {
  background: var(--accent);
  border: none;
  color: white;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  padding: 0.875rem 1.5rem;
  border-radius: 8px;
  cursor: pointer;
  width: 100%;
  transition: all var(--transition-normal);
}

.primary-btn:hover:not(:disabled) {
  background: var(--accent-hover);
}

.primary-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.secondary-btn {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  padding: 0.875rem 1.5rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.secondary-btn:hover {
  background: var(--bg-card-hover);
}

.modal-buttons {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.modal-buttons .primary-btn,
.modal-buttons .secondary-btn {
  flex: 1;
}

#new-goal-section {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border);
}

/* Work Complete Modal */
#work-complete-modal .duration-input {
  margin-bottom: var(--spacing-md);
}

#work-complete-modal .duration-input label {
  display: block;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: var(--spacing-xs);
}

#work-complete-modal .duration-control {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  justify-content: center;
}

#work-complete-modal .duration-control input {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 600;
  text-align: center;
  width: 4ch;
  padding: 0.5rem;
  pointer-events: none;
}

#work-complete-modal .duration-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

#work-complete-modal .duration-arrow {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  color: var(--text-primary);
  cursor: pointer;
  font-size: 1.5rem;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

#work-complete-modal .duration-arrow:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

@keyframes heartBeat {
  0%,
  100% {
    transform: scale(1);
  }
  25% {
    transform: scale(1.3);
  }
  50% {
    transform: scale(1.1);
  }
}

@keyframes glow {
  0%,
  100% {
    filter: drop-shadow(0 0 8px rgba(255, 216, 155, 0.3));
  }
  50% {
    filter: drop-shadow(0 0 16px rgba(255, 216, 155, 0.6));
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Micro-interactions */
.duration-control input.changed {
  animation: pulse 0.3s ease-out;
}

.session-like.liked {
  animation: heartBeat 0.3s ease-out;
}

/* Timer glow at milestones */
.countdown.milestone {
  animation: glow 1s ease-in-out infinite;
}

/* Timer pause pulse */
.countdown.paused {
  animation: pausePulse 2s ease-in-out infinite;
}

@keyframes pausePulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

/* Clickable timer display when session is active */
.app-container:not([data-timer-state="idle"]) .timer-display {
  cursor: pointer;
}

/* End Session button (shown only when paused) —
   Absolutely positioned just below the timer, centered. */
.timer-end-paused {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  margin-top: var(--spacing-sm);
  display: flex;
  justify-content: center;
  white-space: nowrap;
}

.timer-end-paused-btn {
  background: none;
  border: 1px solid #ef4444;
  color: #ef4444;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.timer-end-paused-btn:hover {
  background: #ef4444;
  color: var(--bg-primary);
}

/* Success flash */
.action-btn.success {
  background: var(--success) !important;
  transition: background 0.2s ease;
}

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

/* Duration inputs - no focus/selection states */
.duration-control input:focus,
.duration-control input:active {
  outline: none;
  border: none;
}

/* Text inputs and textareas - keep subtle focus */
.participant-item input:focus {
  border-bottom-color: var(--accent);
}

.goal-section textarea:focus {
  border-color: var(--accent);
}

.modal-content textarea:focus {
  border-color: var(--accent);
}

/* Loading State */
.loading {
  display: inline-block;
  width: 0.875rem;
  height: 0.875rem;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 0.8s linear infinite;
  vertical-align: middle;
  margin-right: 0.25rem;
}

/* Keyboard shortcut hint */
.keyboard-hint {
  position: fixed;
  bottom: var(--spacing-sm);
  left: var(--spacing-sm);
  font-size: 0.75rem;
  color: var(--text-dimmed);
  background: var(--bg-card);
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: 98;
  pointer-events: none;
}

.keyboard-hint.show {
  opacity: 1;
}

.keyboard-hint kbd {
  background: var(--bg-panel);
  padding: 0.125rem 0.375rem;
  border-radius: 3px;
  font-family: monospace;
  font-size: 0.875em;
  border: 1px solid var(--border);
}

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

/* Responsive - Mobile Layout */
@media (max-width: 768px) {
  /* Prevent any scrolling on mobile */
  html,
  body {
    overflow: hidden;
    width: 100vw;
    height: 100vh;
    max-width: 100vw;
    max-height: 100vh;
    position: fixed;
  }

  .app-container {
    overflow: hidden;
    width: 100vw;
    height: 100vh;
    max-width: 100vw;
    max-height: 100vh;
  }

  /* Left panel becomes full-width overlay */
  .left-panel {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    max-width: 100vw;
    max-height: 100vh;
    z-index: 1000;
    transform: translateX(0);
    transition: transform var(--transition-slide);
    overflow-y: auto;
    overflow-x: hidden;
    box-sizing: border-box;
  }

  .app-container[data-panel-state="collapsed"] .left-panel {
    transform: translateX(-100%);
  }

  /* Right panel always takes full width underneath */
  .right-panel {
    grid-column: 1 / -1;
    width: 100vw;
    height: 100vh;
    max-width: 100vw;
    max-height: 100vh;
    overflow: hidden;
    box-sizing: border-box;
  }

  /* Panel controls visibility */
  .panel-close-btn {
    display: block;
  }

  .panel-menu-btn {
    display: flex;
    z-index: 999;
  }

  .app-container[data-panel-state="open"] .panel-menu-btn {
    opacity: 0;
    pointer-events: none;
  }

  .app-container[data-panel-state="collapsed"] .panel-menu-btn {
    opacity: 1;
    pointer-events: all;
  }

  /* Panel footer for mobile */
  .panel-footer {
    width: 100vw;
  }

  .panel-view {
    min-height: calc(100vh - 6rem);
  }

  /* Scale down fonts proportionally to fit mobile screens */
  .duration-control input {
    font-size: clamp(5rem, 25vw, 12rem);
  }

  .duration-arrow {
    font-size: clamp(2rem, 8vw, 4rem);
  }

  /* Scale timer sizes down for mobile */
  body[data-timer-size="medium"] .countdown {
    font-size: clamp(3rem, 12vw, 7.5rem);
  }

  body[data-timer-size="large"] .countdown {
    font-size: clamp(5rem, 20vw, 10rem);
  }

  body[data-timer-size="xl"] .countdown {
    font-size: clamp(7rem, 28vw, 13rem);
  }

  .timer-label {
    font-size: clamp(1rem, 4vw, 1.5rem);
  }

  .datetime-display {
    font-size: clamp(0.65rem, 2.5vw, 0.875rem);
  }

  /* Reduce padding to fit content */
  .panel-content,
  .timer-content {
    padding: var(--spacing-md);
    box-sizing: border-box;
    max-width: 100vw;
  }

  /* Adjust spacing for smaller screens */
  .duration-section {
    gap: var(--spacing-md);
  }

  /* Ensure timer controls are visible on mobile */
  .timer-controls {
    bottom: var(--spacing-sm);
    right: var(--spacing-sm);
    z-index: 200;
  }

  /* Adjust session info positioning for mobile */
  .session-info {
    bottom: var(--spacing-md);
    left: var(--spacing-sm);
    right: var(--spacing-sm);
    transform: none;
    width: auto;
    max-width: calc(100% - var(--spacing-md) * 2);
  }

  /* Ensure datetime display is visible */
  .datetime-display {
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    font-size: 0.75rem;
  }

  /* Center timer display properly on mobile */
  .timer-display {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
  }

  body[data-timer-rotation="0"] .timer-display {
    transform: translate(-50%, -50%) rotate(0deg);
  }

  body[data-timer-rotation="90"] .timer-display {
    transform: translate(-50%, -50%) rotate(90deg);
  }

  body[data-timer-rotation="180"] .timer-display {
    transform: translate(-50%, -50%) rotate(180deg);
  }

  body[data-timer-rotation="270"] .timer-display {
    transform: translate(-50%, -50%) rotate(270deg);
  }
}

/* Responsive - iPad mini and small tablets (portrait) */
@media (min-width: 769px) and (max-width: 820px) {
  /* Panel is 500px wide at this breakpoint, use fixed sizing */
  .duration-control input {
    font-size: 140px; /* 28% of 500px panel width */
  }

  .duration-arrow {
    font-size: 2.5rem;
  }

  /* Adjust timer sizes for smaller tablets */
  body[data-timer-size="medium"] .countdown {
    font-size: clamp(4rem, 15vw, 10rem);
  }

  body[data-timer-size="large"] .countdown {
    font-size: clamp(6rem, 18vw, 13rem);
  }

  body[data-timer-size="xl"] .countdown {
    font-size: clamp(7rem, 20vw, 16rem);
  }
}

/* Responsive - Larger tablets (iPad Air, etc.) */
@media (min-width: 821px) and (max-width: 1024px) {
  /* Panel is 500px wide, use fixed sizing */
  .duration-control input {
    font-size: 140px; /* 28% of 500px panel width */
  }
}

/* Responsive - iPad mini landscape */
@media (min-width: 1024px) and (max-width: 1180px) and (orientation: landscape) {
  /* Panel is 500px wide, use fixed sizing */
  .duration-control input {
    font-size: 140px; /* 28% of 500px panel width */
  }
}

/* Auto-rotate timer for medium screens (769-999px) when panel is open */
@media (min-width: 769px) and (max-width: 999px) {
  .app-container[data-panel-state="open"] .timer-display {
    transform: translate(-50%, -50%) rotate(90deg) !important;
  }
}

/* Responsive - Reduced motion preference */