/* ============================================================
   STUDY BUDDY — Modern Production CSS
   ============================================================ */

/* ── CSS Variables ── */
:root {
  --accent:        #f97316;
  --accent-dark:   #ea6c0a;
  --accent-glow:   rgba(249, 115, 22, 0.25);
  --bg:            #faf8f6;
  --bg-card:       #ffffff;
  --bg-input:      #f5f3f0;
  --border:        rgba(0, 0, 0, 0.08);
  --text-primary:  #1a1714;
  --text-secondary:#6b6460;
  --text-muted:    #a09890;
  --success:       #22c55e;
  --danger:        #ef4444;
  --warning:       #eab308;
  --shadow-sm:     0 2px 8px rgba(0,0,0,0.06);
  --shadow-md:     0 8px 24px rgba(0,0,0,0.09);
  --shadow-lg:     0 20px 48px rgba(0,0,0,0.12);
  --radius-sm:     10px;
  --radius-md:     16px;
  --radius-lg:     24px;
  --font:          'DM Sans', sans-serif;
  --transition:    0.22s cubic-bezier(0.4, 0, 0.2, 1);

  /* Ring chart */
  --ring-full: 552.92; /* 2πr = 2 * 3.14159 * 88 */
}

/* ── Dark Mode Variables ── */
body.dark {
  --bg:            #0f0e0d;
  --bg-card:       #1a1917;
  --bg-input:      #252220;
  --border:        rgba(255, 255, 255, 0.07);
  --text-primary:  #f0ede9;
  --text-secondary:#9c9289;
  --text-muted:    #5a5248;
  --shadow-sm:     0 2px 8px rgba(0,0,0,0.3);
  --shadow-md:     0 8px 24px rgba(0,0,0,0.4);
  --shadow-lg:     0 20px 48px rgba(0,0,0,0.5);
  --accent-glow:   rgba(249, 115, 22, 0.18);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-primary);
  min-height: 100vh;
  padding: 0 0 80px;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}

/* ── Ambient blobs ── */
.bg-blob {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
  transition: opacity var(--transition);
}
.blob-1 {
  width: 500px; height: 500px;
  background: rgba(249, 115, 22, 0.07);
  top: -100px; right: -150px;
}
.blob-2 {
  width: 400px; height: 400px;
  background: rgba(59, 130, 246, 0.05);
  bottom: 100px; left: -100px;
}
.blob-3 {
  width: 300px; height: 300px;
  background: rgba(168, 85, 247, 0.04);
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
}
body.dark .blob-1 { background: rgba(249, 115, 22, 0.04); }
body.dark .blob-2 { background: rgba(59, 130, 246, 0.03); }

/* ── Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 40px;
  background: rgba(250, 248, 246, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
body.dark .site-header {
  background: rgba(15, 14, 13, 0.85);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.brand-icon {
  font-size: 1.5rem;
  color: var(--accent);
}

.header-actions {
  display: flex;
  gap: 8px;
}

.icon-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  width: 40px; height: 40px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}
.icon-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}

/* ── Dashboard grid ── */
.dashboard {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-template-rows: auto;
  gap: 20px;
}

/* ── Analytics strip ── */
.analytics-strip {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.stat-chip {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: default;
}
.stat-chip:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.stat-num {
  display: block;
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  letter-spacing: -0.03em;
}

.stat-label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 6px;
  font-weight: 500;
}

/* ── Cards ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}
.card:hover {
  box-shadow: var(--shadow-md);
}

/* Card grid placement */
.card-timer  { grid-column: 1 / 7; }
.card-tasks  { grid-column: 7 / 13; }
.card-buddy  { grid-column: 1 / 5; }
.card-notes  { grid-column: 5 / 10; }
.card-chart  { grid-column: 10 / 13; }
.card-sound  { grid-column: 1 / 4; }

@media (max-width: 1024px) {
  .card-timer  { grid-column: 1 / 7; }
  .card-tasks  { grid-column: 7 / 13; }
  .card-buddy  { grid-column: 1 / 6; }
  .card-notes  { grid-column: 6 / 13; }
  .card-chart  { grid-column: 1 / 7; }
  .card-sound  { grid-column: 7 / 13; }
}

@media (max-width: 768px) {
  .analytics-strip { grid-template-columns: repeat(2, 1fr); }
  .card-timer,
  .card-tasks,
  .card-buddy,
  .card-notes,
  .card-chart,
  .card-sound { grid-column: 1 / -1; }
  .site-header { padding: 14px 20px; }
  .dashboard { padding: 20px 16px; }
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}

.card-header h2 {
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
}

/* ── Buttons ── */
button {
  font-family: var(--font);
  cursor: pointer;
  border: none;
  outline: none;
  transition: var(--transition);
}

.full-btn {
  width: 100%;
  background: var(--accent);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}
.full-btn:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px var(--accent-glow);
}

.text-btn {
  background: none;
  color: var(--text-muted);
  font-size: 0.8rem;
  padding: 4px 8px;
  border-radius: 6px;
}
.text-btn:hover {
  color: var(--accent);
  background: var(--accent-glow);
}

.cancel-btn {
  background: var(--bg-input);
  color: var(--text-secondary);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-weight: 500;
}
.cancel-btn:hover { background: var(--border); }

/* ── Inputs ── */
input[type="text"],
textarea,
select {
  font-family: var(--font);
  font-size: 0.9rem;
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  width: 100%;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
input[type="text"]:focus,
textarea:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ============================================================
   TIMER
   ============================================================ */

.mode-tabs {
  display: flex;
  gap: 6px;
}
.mode-tab {
  background: var(--bg-input);
  color: var(--text-secondary);
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
}
.mode-tab.active,
.mode-tab:hover {
  background: var(--accent);
  color: #fff;
}

.timer-ring-wrap {
  position: relative;
  width: 200px;
  height: 200px;
  margin: 16px auto;
}

.timer-ring {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.ring-bg {
  fill: none;
  stroke: var(--bg-input);
  stroke-width: 10;
}

.ring-progress {
  fill: none;
  stroke: var(--accent);
  stroke-width: 10;
  stroke-linecap: round;
  stroke-dasharray: var(--ring-full);
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 1s linear, stroke 0.4s ease;
  filter: drop-shadow(0 0 8px var(--accent-glow));
}

.ring-progress.break-mode { stroke: var(--success); }

.timer-inner {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.timer-display {
  font-size: 2.8rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  line-height: 1;
  transition: color var(--transition);
}

.timer-mode-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.timer-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 4px;
}

.ctrl-btn {
  background: var(--bg-input);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  width: 44px; height: 44px;
  border-radius: 50%;
  font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
}
.ctrl-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: scale(1.08);
}
.ctrl-btn.primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.ctrl-btn.primary:hover {
  background: var(--accent-dark);
  color: #fff;
  box-shadow: 0 4px 16px var(--accent-glow);
}
.ctrl-btn.large {
  width: 62px; height: 62px;
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: 50%;
  flex-shrink: 0;
}

.pomodoro-progress {
  display: flex;
  align-items: center;
  gap: 10px;
  justify-content: center;
  margin-top: 16px;
}

.pom-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.pom-dots {
  display: flex;
  gap: 6px;
}

.pom-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--bg-input);
  border: 2px solid var(--border);
  transition: background 0.3s, border-color 0.3s;
}
.pom-dot.done {
  background: var(--accent);
  border-color: var(--accent);
}
.pom-dot.active {
  border-color: var(--accent);
  animation: pom-pulse 1.2s ease-in-out infinite;
}

@keyframes pom-pulse {
  0%, 100% { transform: scale(1); box-shadow: 0 0 0 0 var(--accent-glow); }
  50%       { transform: scale(1.2); box-shadow: 0 0 0 4px var(--accent-glow); }
}

/* ============================================================
   TASKS
   ============================================================ */

.task-add-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 8px;
  margin-bottom: 12px;
}
.task-add-row select {
  width: auto;
  padding: 10px 10px;
}
.task-add-row button {
  background: var(--accent);
  color: #fff;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.88rem;
  white-space: nowrap;
}
.task-add-row button:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
}

.task-filters {
  display: flex;
  gap: 6px;
  margin-bottom: 14px;
}
.filter-btn {
  background: var(--bg-input);
  color: var(--text-muted);
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
  border: 1px solid transparent;
}
.filter-btn.active,
.filter-btn:hover {
  background: var(--accent);
  color: #fff;
}

.task-count {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-input);
  padding: 4px 10px;
  border-radius: 20px;
}

.task-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 320px;
  overflow-y: auto;
  padding-right: 4px;
}

.task-list::-webkit-scrollbar { width: 4px; }
.task-list::-webkit-scrollbar-track { background: transparent; }
.task-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.task-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  cursor: pointer;
  transition: var(--transition);
  animation: slideIn 0.25s ease;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(-10px); }
  to   { opacity: 1; transform: translateX(0); }
}

.task-item:hover {
  border-color: var(--accent);
  transform: translateX(3px);
}

.task-item.done {
  opacity: 0.55;
}

.task-item.done .task-text {
  text-decoration: line-through;
}

.task-checkbox {
  flex-shrink: 0;
  width: 18px; height: 18px;
  border: 2px solid var(--text-muted);
  border-radius: 5px;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
  font-size: 0.65rem;
  color: transparent;
}
.task-item.done .task-checkbox {
  background: var(--success);
  border-color: var(--success);
  color: #fff;
}

.priority-dot {
  flex-shrink: 0;
  width: 8px; height: 8px;
  border-radius: 50%;
}
.priority-dot.high   { background: var(--danger);  }
.priority-dot.medium { background: var(--warning); }
.priority-dot.low    { background: var(--success); }

.task-text {
  flex: 1;
  font-size: 0.88rem;
  color: var(--text-primary);
  line-height: 1.3;
}

.task-actions {
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity var(--transition);
}
.task-item:hover .task-actions { opacity: 1; }

.task-act-btn {
  background: none;
  color: var(--text-muted);
  padding: 4px 6px;
  border-radius: 6px;
  font-size: 0.8rem;
}
.task-act-btn:hover { color: var(--accent); background: var(--accent-glow); }
.task-act-btn.del:hover { color: var(--danger); background: rgba(239,68,68,0.1); }

.task-footer {
  margin-top: 12px;
  display: flex;
  justify-content: flex-end;
}

/* ============================================================
   AI BUDDY
   ============================================================ */

.badge {
  background: linear-gradient(135deg, var(--accent), #f59e0b);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.buddy-avatar {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.avatar-ring {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-glow), rgba(249,115,22,0.1));
  border: 2px solid var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem;
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-5px); }
}

.buddy-status {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}
.buddy-status.active { color: var(--success); }

.advice-bubble {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--text-secondary);
  margin-bottom: 16px;
  min-height: 72px;
  transition: var(--transition);
}

/* ============================================================
   NOTES
   ============================================================ */

.save-indicator {
  font-size: 0.75rem;
  color: var(--success);
  font-weight: 600;
  opacity: 0;
  transition: opacity 0.4s;
}
.save-indicator.visible { opacity: 1; }

.card-notes textarea {
  height: 160px;
  resize: vertical;
  min-height: 100px;
  max-height: 300px;
}

.notes-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 8px;
}

#charCount {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ============================================================
   CHART
   ============================================================ */

.chart-wrap {
  position: relative;
  height: 160px;
}

/* ============================================================
   SOUND
   ============================================================ */

.sound-status {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.sound-status.on { color: var(--success); }

.sound-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 14px;
}

.sound-btn {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  font-size: 1.3rem;
  cursor: pointer;
  transition: var(--transition);
}
.sound-btn span {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.sound-btn:hover,
.sound-btn.active {
  border-color: var(--accent);
  background: var(--accent-glow);
}
.sound-btn.active span { color: var(--accent); }

.volume-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
}
.volume-row input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
  padding: 0;
  height: 4px;
}

.sound-note {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 10px;
  text-align: center;
  font-style: italic;
}

/* ============================================================
   MODAL
   ============================================================ */

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(6px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s ease;
}
.modal.hidden { display: none; }

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

.modal-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.25s ease;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}

.modal-box h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 4px;
}
.modal-actions button:first-child {
  background: var(--accent);
  color: #fff;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-weight: 600;
}
.modal-actions button:first-child:hover { background: var(--accent-dark); }

/* ============================================================
   AI CHAT — Study Buddy Upgrade
   ============================================================ */

/* Card layout override — column flex for chat */
.card-buddy {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.buddy-header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Online indicator dot */
.buddy-status-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  flex-shrink: 0;
  transition: background 0.3s;
}
.buddy-status-dot.online   { background: var(--success); box-shadow: 0 0 0 3px rgba(34,197,94,0.18); }
.buddy-status-dot.thinking { background: var(--warning); animation: dot-pulse 1s ease-in-out infinite; }

@keyframes dot-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.8); }
}

.buddy-status {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  min-width: 56px;
}

/* ── Chat window ── */
.chat-window {
  flex: 1;
  min-height: 260px;
  max-height: 320px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 4px 2px 8px;
  margin-bottom: 10px;
  scroll-behavior: smooth;
}
.chat-window::-webkit-scrollbar { width: 4px; }
.chat-window::-webkit-scrollbar-track { background: transparent; }
.chat-window::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* ── Individual messages ── */
.chat-msg {
  display: flex;
  gap: 10px;
  align-items: flex-end;
  animation: msgIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes msgIn {
  from { opacity: 0; transform: translateY(10px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.chat-msg.user { flex-direction: row-reverse; }

.chat-avatar {
  flex-shrink: 0;
  width: 30px; height: 30px;
  border-radius: 50%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem;
}
.chat-msg.user .chat-avatar {
  background: var(--accent);
  border-color: var(--accent);
  font-size: 0.65rem;
  color: #fff;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.chat-bubble {
  max-width: 80%;
  padding: 10px 14px;
  border-radius: 16px;
  font-size: 0.86rem;
  line-height: 1.55;
  color: var(--text-primary);
  background: var(--bg-input);
  border: 1px solid var(--border);
  white-space: pre-wrap;
  word-break: break-word;
}
.chat-msg.user .chat-bubble {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  border-bottom-right-radius: 4px;
}
.chat-msg.ai .chat-bubble {
  border-bottom-left-radius: 4px;
}
.chat-bubble code {
  background: rgba(0,0,0,0.08);
  padding: 1px 5px;
  border-radius: 4px;
  font-family: 'Courier New', monospace;
  font-size: 0.82em;
}
body.dark .chat-bubble code { background: rgba(255,255,255,0.1); }

/* Typing indicator */
.chat-msg.typing .chat-bubble { padding: 12px 16px; }
.typing-dots { display: flex; gap: 5px; align-items: center; }
.typing-dots span {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--text-muted);
  animation: typingBounce 1.2s ease-in-out infinite;
}
.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); }
  30%            { transform: translateY(-6px); }
}

/* ── Suggestion chips ── */
.chat-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}
.chat-suggestions.hidden { display: none; }

.suggestion-chip {
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.suggestion-chip:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
  transform: translateY(-1px);
}

/* ── Chat input row ── */
.chat-input-row {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: auto;
  padding-top: 2px;
}
.chat-input-row input {
  flex: 1;
  margin: 0;
  padding: 10px 14px;
  border-radius: 24px;
}
.chat-send-btn {
  flex-shrink: 0;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  border: none;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}
.chat-send-btn:hover:not(:disabled) {
  background: var(--accent-dark);
  transform: scale(1.08);
  box-shadow: 0 4px 14px var(--accent-glow);
}
.chat-send-btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }

/* Error bubble */
.chat-msg.error .chat-bubble {
  background: rgba(239,68,68,0.08);
  border-color: rgba(239,68,68,0.3);
  color: var(--danger);
}

/* ============================================================
   UTILITIES & ANIMATIONS
   ============================================================ */

.ring-progress.pulse-anim {
  animation: ringPulse 0.5s ease;
}

@keyframes ringPulse {
  0%   { filter: drop-shadow(0 0 8px var(--accent-glow)); }
  50%  { filter: drop-shadow(0 0 24px var(--accent)); }
  100% { filter: drop-shadow(0 0 8px var(--accent-glow)); }
}

/* Toast notification */
.toast {
  position: fixed;
  bottom: 32px;
  right: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  padding: 14px 20px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-primary);
  z-index: 999;
  animation: toastIn 0.3s ease, toastOut 0.3s ease 2.7s forwards;
  max-width: 320px;
}

@keyframes toastIn  { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
@keyframes toastOut { to   { transform: translateY(20px); opacity: 0; } }