:root {
  /* Ink & paper base */
  --ink-950: #0E1016;
  --ink-900: #14171F;
  --ink-800: #1B1F2B;
  --ink-700: #242938;
  --ink-600: #323847;
  --ink-500: #4A5166;

  --paper: #F4F1EA;
  --paper-dim: #C7C4BC;
  --paper-faint: #8A8778;

  /* Highlighter accents */
  --marker-yellow: #F5C518;
  --marker-yellow-dim: #7A6412;
  --marker-coral: #FF6F91;
  --marker-coral-dim: #7A3546;
  --marker-mint: #6EE7B7;
  --marker-mint-dim: #2E6B54;
  --marker-blue: #7FB6FF;

  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.375rem;
  --text-2xl: 1.75rem;
  --text-3xl: 2.25rem;
  --text-4xl: 3rem;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 150ms;
  --dur-med: 320ms;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

* { box-sizing: border-box; }
html, body, #app-root { height: 100%; margin: 0; }

body {
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; letter-spacing: -0.01em; margin: 0; color: var(--paper); }
p { margin: 0; }
button { font-family: var(--font-body); cursor: pointer; border: none; background: none; color: inherit; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--marker-yellow); outline-offset: 2px; }

.app-shell { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
@media (max-width: 860px) { .app-shell { grid-template-columns: 1fr; } }

.sidebar {
  background: var(--ink-950);
  border-right: 1px solid var(--ink-700);
  padding: 28px 0 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  position: sticky;
  top: 0;
  height: 100vh;
}
@media (max-width: 860px) {
  .sidebar { position: static; height: auto; flex-direction: row; overflow-x: auto; padding: 12px 16px; border-right: none; border-bottom: 1px solid var(--ink-700); }
}

.sidebar-brand { padding: 0 24px 24px; display: flex; align-items: baseline; gap: 8px; }
@media (max-width: 860px) { .sidebar-brand { display: none; } }
.sidebar-brand-mark { width: 10px; height: 10px; background: var(--marker-yellow); border-radius: 2px; transform: rotate(-6deg); }
.sidebar-brand-text { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 700; }

.sidebar-tab {
  display: flex; align-items: center; gap: 12px; padding: 11px 24px;
  color: var(--paper-dim); font-size: var(--text-sm); font-weight: 500;
  position: relative; transition: color var(--dur-fast) var(--ease-out); white-space: nowrap;
}
.sidebar-tab:hover { color: var(--paper); }
.sidebar-tab.active { color: var(--paper); background: var(--ink-800); }
.sidebar-tab.active::before { content: ''; position: absolute; left: 0; top: 8px; bottom: 8px; width: 3px; background: var(--marker-yellow); border-radius: 0 3px 3px 0; }
@media (max-width: 860px) { .sidebar-tab.active::before { display: none; } .sidebar-tab.active { border-radius: var(--radius-sm); } }
.sidebar-tab-icon { font-size: 16px; line-height: 1; }

.main { padding: 32px 40px 120px; max-width: 1100px; }
@media (max-width: 640px) { .main { padding: 20px 16px 140px; } }

.page-header { margin-bottom: 28px; }
.page-eyebrow { color: var(--marker-yellow); font-size: var(--text-sm); font-weight: 600; margin-bottom: 6px; }
.page-title { font-size: var(--text-3xl); }
.page-sub { color: var(--paper-dim); font-size: var(--text-base); margin-top: 8px; max-width: 60ch; }

.card { background: var(--ink-800); border: 1px solid var(--ink-700); border-radius: var(--radius-lg); padding: 20px; }
.card-tight { border-radius: var(--radius-md); padding: 14px 16px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 780px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

.btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 18px; border-radius: var(--radius-pill); font-size: var(--text-sm); font-weight: 600; transition: transform var(--dur-fast) var(--ease-out), background var(--dur-fast); }
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--marker-yellow); color: var(--ink-950); }
.btn-primary:hover { background: #FFD64D; }
.btn-ghost { background: var(--ink-700); color: var(--paper); }
.btn-ghost:hover { background: var(--ink-600); }
.btn-sm { padding: 6px 14px; font-size: var(--text-xs); }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

.input, select.input {
  background: var(--ink-700); border: 1px solid var(--ink-600); border-radius: 8px;
  padding: 10px 12px; color: var(--paper); font-size: var(--text-sm); font-family: var(--font-body);
}
.input::placeholder { color: var(--paper-faint); }

.agent-bar-wrap { position: fixed; left: 240px; right: 0; bottom: 0; display: flex; justify-content: center; padding: 20px 40px; pointer-events: none; }
@media (max-width: 860px) { .agent-bar-wrap { left: 0; padding: 14px 16px; } }
.agent-bar { pointer-events: auto; width: 100%; max-width: 720px; background: var(--ink-800); border: 1px solid var(--ink-600); border-radius: var(--radius-lg); box-shadow: 0 12px 40px rgba(0,0,0,0.45); padding: 8px 8px 8px 18px; display: flex; align-items: center; gap: 10px; }
.agent-bar-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--marker-mint); flex-shrink: 0; }
.agent-bar-dot.busy { background: var(--marker-yellow); animation: pulse 1.1s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.5; transform: scale(0.8); } }
.agent-bar input { flex: 1; background: none; border: none; color: var(--paper); font-size: var(--text-sm); padding: 10px 0; }
.agent-bar input::placeholder { color: var(--paper-faint); }
.agent-bar input:focus { outline: none; }
.agent-log { max-width: 720px; margin: 0 auto 8px; font-size: var(--text-xs); color: var(--paper-dim); padding: 0 6px; }

.stat-pill { display: inline-flex; align-items: baseline; gap: 6px; }
.stat-value { font-family: var(--font-display); font-size: var(--text-2xl); font-weight: 700; }
.stat-label { color: var(--paper-dim); font-size: var(--text-xs); }

.badge { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: var(--radius-pill); font-size: var(--text-xs); font-weight: 600; }
.badge-yellow { background: rgba(245,197,24,0.15); color: var(--marker-yellow); }
.badge-coral { background: rgba(255,111,145,0.15); color: var(--marker-coral); }
.badge-mint { background: rgba(110,231,183,0.15); color: var(--marker-mint); }

.board { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; align-items: start; }
@media (max-width: 780px) { .board { grid-template-columns: 1fr; } }
.board-col-title { font-size: var(--text-sm); font-weight: 600; color: var(--paper-dim); margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.board-col-count { background: var(--ink-700); border-radius: var(--radius-pill); padding: 1px 8px; font-size: var(--text-xs); }

.task-card { background: var(--ink-800); border: 1px solid var(--ink-700); border-left: 3px solid var(--marker-blue); border-radius: var(--radius-md); padding: 12px 14px; margin-bottom: 10px; cursor: grab; transition: transform var(--dur-fast) var(--ease-out), border-color var(--dur-fast); }
.task-card:active { cursor: grabbing; }
.task-card.priority-high { border-left-color: var(--marker-coral); }
.task-card.priority-med { border-left-color: var(--marker-yellow); }
.task-card.priority-low { border-left-color: var(--marker-mint); }
.task-card.dragging { opacity: 0.4; }
.task-card-title { font-size: var(--text-sm); font-weight: 600; margin-bottom: 4px; }
.task-card-meta { font-size: var(--text-xs); color: var(--paper-dim); }
.board-col-drop { min-height: 60px; border-radius: var(--radius-md); transition: background var(--dur-fast); }
.board-col-drop.drag-over { background: var(--ink-800); outline: 1px dashed var(--ink-600); }

.slide-stage { aspect-ratio: 16 / 9; background: linear-gradient(160deg, var(--ink-800), var(--ink-700)); border-radius: var(--radius-lg); border: 1px solid var(--ink-600); display: flex; flex-direction: column; justify-content: center; padding: 48px; position: relative; overflow: hidden; }
.slide-stage::before { content: ''; position: absolute; top: -60px; right: -60px; width: 220px; height: 220px; background: var(--marker-yellow); opacity: 0.08; border-radius: 50%; }
.slide-kicker { color: var(--marker-yellow); font-size: var(--text-sm); font-weight: 600; margin-bottom: 10px; }
.slide-heading { font-size: var(--text-2xl); margin-bottom: 16px; }
.slide-body { color: var(--paper-dim); font-size: var(--text-base); max-width: 60ch; }
.slide-nav { display: flex; align-items: center; justify-content: space-between; margin-top: 16px; }
.slide-dots { display: flex; gap: 6px; }
.slide-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--ink-600); transition: background var(--dur-fast), width var(--dur-fast); }
.slide-dot.active { background: var(--marker-yellow); width: 18px; border-radius: var(--radius-pill); }

.flip-card { perspective: 1200px; aspect-ratio: 4 / 3; }
.flip-card-inner { position: relative; width: 100%; height: 100%; transition: transform var(--dur-med) var(--ease-out); transform-style: preserve-3d; }
.flip-card.flipped .flip-card-inner { transform: rotateY(180deg); }
.flip-face { position: absolute; inset: 0; backface-visibility: hidden; border-radius: var(--radius-lg); border: 1px solid var(--ink-600); display: flex; align-items: center; justify-content: center; text-align: center; padding: 24px; font-size: var(--text-lg); font-weight: 600; cursor: pointer; }
.flip-front { background: var(--ink-800); }
.flip-back { background: var(--ink-700); transform: rotateY(180deg); color: var(--marker-mint); }

.quiz-option { display: block; width: 100%; text-align: left; padding: 13px 16px; border-radius: var(--radius-md); background: var(--ink-800); border: 1px solid var(--ink-700); margin-bottom: 10px; font-size: var(--text-sm); transition: border-color var(--dur-fast), background var(--dur-fast); }
.quiz-option:hover { border-color: var(--marker-blue); }
.quiz-option.correct { border-color: var(--marker-mint); background: rgba(110,231,183,0.08); }
.quiz-option.incorrect { border-color: var(--marker-coral); background: rgba(255,111,145,0.08); }
.quiz-option[disabled] { cursor: default; }

.timer-ring-wrap { display: flex; justify-content: center; padding: 20px 0; }
.timer-value { font-family: var(--font-display); font-size: var(--text-4xl); font-weight: 700; }

.progress-track { height: 8px; background: var(--ink-700); border-radius: var(--radius-pill); overflow: hidden; }
.progress-fill { height: 100%; border-radius: var(--radius-pill); transition: width var(--dur-med) var(--ease-out); }
.progress-row { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.progress-row-label { width: 130px; font-size: var(--text-sm); flex-shrink: 0; }
.progress-row-pct { width: 40px; text-align: right; font-size: var(--text-xs); color: var(--paper-dim); }

/* ---------- Motivational quote toast ---------- */

.quote-toast-wrap {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-med) var(--ease-out), transform var(--dur-med) var(--ease-out);
  width: min(420px, calc(100vw - 32px));
}

.quote-toast-wrap.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.quote-toast {
  background: linear-gradient(135deg, var(--ink-800), var(--ink-700));
  border: 1px solid var(--marker-yellow);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  box-shadow: 0 16px 48px rgba(0,0,0,0.5);
  position: relative;
}

.quote-toast-heading {
  color: var(--marker-yellow);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.quote-toast-text {
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--paper);
  padding-right: 20px;
}

.quote-toast-author {
  margin-top: 8px;
  font-size: var(--text-xs);
  color: var(--paper-dim);
}

.quote-toast-close {
  position: absolute;
  top: 12px;
  right: 14px;
  font-size: 18px;
  line-height: 1;
  color: var(--paper-dim);
}

.quote-toast-close:hover { color: var(--paper); }

.quote-toast.alarm-toast {
  border-color: var(--marker-coral);
}