/* ═══════════════════════════════════════════════
   KAIRO — AI Calendar Assistant
   Style Sheet
   ═══════════════════════════════════════════════ */

/* ── CSS Variables ── */
:root {
  --bg-base:       #0d1117;
  --bg-surface:    #161b24;
  --bg-elevated:   #1e2533;
  --bg-hover:      #252d3d;
  --bg-input:      #1a2030;

  --border:        rgba(255,255,255,0.07);
  --border-bright: rgba(255,255,255,0.14);

  --text-primary:  #e8edf5;
  --text-secondary:#8a95a8;
  --text-muted:    #4e5869;

  --accent:        #4f8ef7;
  --accent-glow:   rgba(79,142,247,0.25);
  --accent-light:  #6fa3f9;

  --success:       #3dd68c;
  --danger:        #f76b6b;
  --warning:       #f9c74f;

  --user-bubble:   linear-gradient(135deg, #4f8ef7 0%, #7b5ea7 100%);
  --bot-bubble:    #1e2533;

  --sidebar-w:     300px;
  --topbar-h:      60px;

  --radius-sm:     8px;
  --radius-md:     14px;
  --radius-lg:     20px;
  --radius-xl:     28px;

  --shadow-sm:     0 2px 8px rgba(0,0,0,0.3);
  --shadow-md:     0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg:     0 8px 40px rgba(0,0,0,0.5);

  --transition:    all 0.25s cubic-bezier(0.4,0,0.2,1);
  --transition-bounce: all 0.35s cubic-bezier(0.34,1.56,0.64,1);

  /* Badge Colors */
  --meeting-c:   #4f8ef7;
  --class-c:     #a78bfa;
  --reminder-c:  #f9c74f;
  --work-c:      #3dd68c;
  --personal-c:  #fb8b74;
  --other-c:     #8a95a8;
}

/* ── Light Theme ── */
body.light {
  --bg-base:       #f0f4fa;
  --bg-surface:    #ffffff;
  --bg-elevated:   #f8fafd;
  --bg-hover:      #edf1f9;
  --bg-input:      #eef2f9;

  --border:        rgba(0,0,0,0.07);
  --border-bright: rgba(0,0,0,0.12);

  --text-primary:  #1a2035;
  --text-secondary:#5a6478;
  --text-muted:    #9ba5b5;

  --accent-glow:   rgba(79,142,247,0.15);
  --bot-bubble:    #ffffff;
  --shadow-sm:     0 2px 8px rgba(0,0,0,0.08);
  --shadow-md:     0 4px 20px rgba(0,0,0,0.12);
  --shadow-lg:     0 8px 40px rgba(0,0,0,0.18);
}

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

html { font-size: 16px; }

body {
  font-family: 'Poppins', sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  height: 100dvh;
  overflow: hidden;
  transition: background 0.3s, color 0.3s;
}

/* scrollbar */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-bright); border-radius: 2px; }

/* ══════════════════════════════════════════════
   APP SHELL
══════════════════════════════════════════════ */
.app-shell {
  display: flex;
  height: 100dvh;
  position: relative;
}

/* ══════════════════════════════════════════════
   SIDEBAR
══════════════════════════════════════════════ */
.sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: var(--transition);
  z-index: 200;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent), #7b5ea7);
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  color: #fff;
  box-shadow: 0 0 14px var(--accent-glow);
  flex-shrink: 0;
}

.brand-name {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.sidebar-close {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.sidebar-close:hover { background: var(--bg-hover); color: var(--text-primary); }

/* Filter Section */
.filter-section {
  padding: 16px 20px 8px;
}

.section-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.filter-btns {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.filter-btn {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text-secondary);
  font-family: 'Poppins', sans-serif;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 5px 14px;
  cursor: pointer;
  transition: var(--transition);
}
.filter-btn:hover { border-color: var(--accent); color: var(--accent); }
.filter-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 0 12px var(--accent-glow);
}

/* Type Filters */
.type-filters {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.type-check {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.type-check input[type="checkbox"] {
  appearance: none;
  width: 16px;
  height: 16px;
  border: 1.5px solid var(--border-bright);
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
  position: relative;
}
.type-check input[type="checkbox"]:checked {
  background: var(--accent);
  border-color: var(--accent);
}
.type-check input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  left: 4px; top: 1px;
  width: 5px; height: 9px;
  border: 2px solid #fff;
  border-top: none; border-left: none;
  transform: rotate(45deg);
}

/* ── Badges ── */
.badge {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 20px;
  letter-spacing: 0.02em;
}
.badge.meeting  { background: rgba(79,142,247,0.15); color: var(--meeting-c); }
.badge.class    { background: rgba(167,139,250,0.15); color: var(--class-c); }
.badge.reminder { background: rgba(249,199,79,0.15); color: var(--reminder-c); }
.badge.work     { background: rgba(61,214,140,0.15); color: var(--work-c); }
.badge.personal { background: rgba(251,139,116,0.15); color: var(--personal-c); }
.badge.other    { background: rgba(138,149,168,0.15); color: var(--other-c); }

/* Events Section */
.events-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 16px 0 0;
}

.events-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px 10px;
}

.event-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  background: var(--accent);
  color: #fff;
  border-radius: 10px;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0 5px;
  margin-left: 6px;
}

.clear-all-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  padding: 5px;
  display: grid;
  place-items: center;
  transition: var(--transition);
}
.clear-all-btn:hover { border-color: var(--danger); color: var(--danger); }

.events-list {
  flex: 1;
  overflow-y: auto;
  padding: 0 12px 20px;
}

/* Event Cards in Sidebar */
.event-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  margin-bottom: 8px;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  animation: cardSlideIn 0.35s cubic-bezier(0.34,1.2,0.64,1) both;
}

@keyframes cardSlideIn {
  from { opacity:0; transform: translateX(-16px) scale(0.97); }
  to   { opacity:1; transform: translateX(0) scale(1); }
}

.event-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  border-radius: 0 2px 2px 0;
}
.event-card[data-type="meeting"]::before  { background: var(--meeting-c); }
.event-card[data-type="class"]::before    { background: var(--class-c); }
.event-card[data-type="reminder"]::before { background: var(--reminder-c); }
.event-card[data-type="work"]::before     { background: var(--work-c); }
.event-card[data-type="personal"]::before { background: var(--personal-c); }
.event-card[data-type="other"]::before    { background: var(--other-c); }

.event-card:hover {
  border-color: var(--border-bright);
  background: var(--bg-hover);
  transform: translateX(3px);
}

.event-card.today-event {
  border-color: rgba(79,142,247,0.3);
  background: rgba(79,142,247,0.06);
}

.event-card-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 5px;
}

.event-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
}

.event-card-datetime {
  font-size: 0.7rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 4px;
}

.event-delete-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 3px;
  border-radius: 4px;
  display: grid;
  place-items: center;
  transition: var(--transition);
  opacity: 0;
}
.event-card:hover .event-delete-btn { opacity: 1; }
.event-delete-btn:hover { color: var(--danger); background: rgba(247,107,107,0.1); }

.empty-events {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
}
.empty-icon { font-size: 2.5rem; margin-bottom: 12px; }
.empty-events p { font-size: 0.82rem; line-height: 1.6; }

/* ══════════════════════════════════════════════
   MAIN CONTENT
══════════════════════════════════════════════ */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

/* ── Topbar ── */
.topbar {
  height: var(--topbar-h);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
  flex-shrink: 0;
}

.menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.menu-btn:hover { background: var(--bg-hover); color: var(--text-primary); }

.topbar-center {
  flex: 1;
  display: flex;
  justify-content: center;
}

.ai-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.ai-dot {
  width: 8px;
  height: 8px;
  background: var(--success);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--success);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity:1; transform: scale(1); }
  50%       { opacity:0.6; transform: scale(0.8); }
}

.topbar-actions { display: flex; align-items: center; gap: 8px; }

.icon-btn {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  width: 34px; height: 34px;
  display: grid; place-items: center;
  transition: var(--transition);
}
.icon-btn:hover { border-color: var(--accent); color: var(--accent); }

/* ── Chat Window ── */
.chat-window {
  flex: 1;
  overflow-y: auto;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  scroll-behavior: smooth;
}

/* ── Messages ── */
.message {
  display: flex;
  gap: 10px;
  animation: msgIn 0.4s cubic-bezier(0.34,1.2,0.64,1) both;
  max-width: 100%;
}

@keyframes msgIn {
  from { opacity:0; transform: translateY(14px) scale(0.97); }
  to   { opacity:1; transform: translateY(0) scale(1); }
}

.message.user { flex-direction: row-reverse; }

.avatar {
  width: 34px; height: 34px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-size: 0.85rem;
  font-weight: 700;
  flex-shrink: 0;
  align-self: flex-end;
}

.avatar.bot-avatar {
  background: linear-gradient(135deg, var(--accent), #7b5ea7);
  color: #fff;
  box-shadow: 0 0 12px var(--accent-glow);
}

.avatar.user-avatar {
  background: linear-gradient(135deg, #7b5ea7, #c084fc);
  color: #fff;
}

.bubble-wrap { display: flex; flex-direction: column; max-width: 72%; }

.message.user .bubble-wrap { align-items: flex-end; }

.bubble {
  padding: 12px 16px;
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  line-height: 1.65;
  word-break: break-word;
  position: relative;
}

.message.bot .bubble {
  background: var(--bot-bubble);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
  color: var(--text-primary);
}

.message.user .bubble {
  background: var(--user-bubble);
  border-bottom-right-radius: 4px;
  color: #fff;
  box-shadow: 0 4px 16px var(--accent-glow);
}

.msg-time {
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-top: 4px;
  padding: 0 4px;
}

/* Welcome card inside chat */
.welcome-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 28px;
  text-align: center;
  margin: auto;
  max-width: 400px;
  animation: fadeScale 0.5s cubic-bezier(0.34,1.2,0.64,1) both;
}

@keyframes fadeScale {
  from { opacity:0; transform: scale(0.92); }
  to   { opacity:1; transform: scale(1); }
}

.welcome-icon {
  width: 56px; height: 56px;
  background: linear-gradient(135deg, var(--accent), #7b5ea7);
  border-radius: 16px;
  display: grid; place-items: center;
  margin: 0 auto 16px;
  font-size: 1.6rem;
  box-shadow: 0 0 24px var(--accent-glow);
}

.welcome-card h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.welcome-card p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Typing Indicator */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 12px 16px;
  background: var(--bot-bubble);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  border-bottom-left-radius: 4px;
  width: fit-content;
}

.typing-dot {
  width: 7px; height: 7px;
  background: var(--text-muted);
  border-radius: 50%;
  animation: typingBounce 1.2s ease-in-out infinite;
}
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
  0%,60%,100% { transform: translateY(0); }
  30%          { transform: translateY(-7px); }
}

/* Event Card inside Chat bubble */
.chat-event-card {
  background: var(--bg-base);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-md);
  padding: 14px;
  margin-top: 10px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px 14px;
  align-items: center;
}

.chat-event-icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  display: grid; place-items: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.chat-event-icon.meeting  { background: rgba(79,142,247,0.15); }
.chat-event-icon.class    { background: rgba(167,139,250,0.15); }
.chat-event-icon.reminder { background: rgba(249,199,79,0.15); }
.chat-event-icon.work     { background: rgba(61,214,140,0.15); }
.chat-event-icon.personal { background: rgba(251,139,116,0.15); }
.chat-event-icon.other    { background: rgba(138,149,168,0.15); }

.chat-event-info h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 3px;
}
.chat-event-info p {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.all-events-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 10px;
}

.all-event-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: var(--bg-base);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
}

.all-event-row .badge { flex-shrink: 0; }

.row-title {
  flex: 1;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.row-date { color: var(--text-secondary); flex-shrink: 0; }

/* ── Suggestion Chips ── */
.suggestion-bar {
  display: flex;
  gap: 8px;
  padding: 8px 20px;
  overflow-x: auto;
  flex-shrink: 0;
  scrollbar-width: none;
}
.suggestion-bar::-webkit-scrollbar { display: none; }

.chip {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text-secondary);
  font-family: 'Poppins', sans-serif;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 6px 14px;
  white-space: nowrap;
  cursor: pointer;
  transition: var(--transition-bounce);
  flex-shrink: 0;
}
.chip:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 4px 14px var(--accent-glow);
}
.chip:active { transform: translateY(0); }

/* ── Input Area ── */
.input-area {
  padding: 12px 20px 16px;
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.input-wrapper {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  background: var(--bg-input);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 10px 10px 10px 18px;
  transition: var(--transition);
}
.input-wrapper:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.user-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: 'Poppins', sans-serif;
  font-size: 0.875rem;
  line-height: 1.6;
  resize: none;
  max-height: 120px;
  overflow-y: auto;
}
.user-input::placeholder { color: var(--text-muted); }

.send-btn {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--accent), #7b5ea7);
  border: none;
  border-radius: 50%;
  color: #fff;
  cursor: pointer;
  display: grid; place-items: center;
  flex-shrink: 0;
  transition: var(--transition-bounce);
  box-shadow: 0 4px 14px var(--accent-glow);
}
.send-btn:hover { transform: scale(1.08); box-shadow: 0 6px 20px var(--accent-glow); }
.send-btn:active { transform: scale(0.95); }
.send-btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

.input-hint {
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-top: 8px;
  padding-left: 4px;
}
kbd {
  background: var(--bg-elevated);
  border: 1px solid var(--border-bright);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 0.62rem;
  font-family: 'Poppins', sans-serif;
}

/* ══════════════════════════════════════════════
   OVERLAY (mobile)
══════════════════════════════════════════════ */
.overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  z-index: 150;
}

/* ══════════════════════════════════════════════
   MODAL
══════════════════════════════════════════════ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(6px);
  z-index: 500;
  display: grid;
  place-items: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.modal-overlay.open { opacity: 1; pointer-events: auto; }

.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-lg);
  transform: scale(0.92) translateY(20px);
  transition: transform 0.35s cubic-bezier(0.34,1.2,0.64,1);
}
.modal-overlay.open .modal { transform: scale(1) translateY(0); }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 {
  font-size: 1rem;
  font-weight: 600;
}

.modal-close {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  width: 30px; height: 30px;
  display: grid; place-items: center;
  transition: var(--transition);
}
.modal-close:hover { border-color: var(--danger); color: var(--danger); }

.modal-body {
  padding: 20px;
}

.modal-detail {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.detail-icon {
  width: 36px; height: 36px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: grid; place-items: center;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.detail-text { font-size: 0.85rem; color: var(--text-primary); }
.detail-text span { color: var(--text-secondary); font-size: 0.75rem; display: block; margin-top: 1px; }

.modal-footer {
  display: flex;
  gap: 10px;
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  justify-content: flex-end;
}

.btn-danger, .btn-primary {
  font-family: 'Poppins', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn-danger {
  background: rgba(247,107,107,0.12);
  color: var(--danger);
  border: 1px solid rgba(247,107,107,0.2);
}
.btn-danger:hover { background: var(--danger); color: #fff; }

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 14px var(--accent-glow);
}
.btn-primary:hover { background: var(--accent-light); transform: translateY(-1px); }

/* ══════════════════════════════════════════════
   TOAST
══════════════════════════════════════════════ */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background: var(--bg-elevated);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-size: 0.82rem;
  font-weight: 500;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 8px;
  pointer-events: auto;
  animation: toastIn 0.4s cubic-bezier(0.34,1.2,0.64,1) both;
  max-width: 280px;
}

@keyframes toastIn {
  from { opacity:0; transform: translateX(30px) scale(0.9); }
  to   { opacity:1; transform: translateX(0) scale(1); }
}

.toast.fade-out {
  animation: toastOut 0.35s ease forwards;
}

@keyframes toastOut {
  to { opacity:0; transform: translateX(20px) scale(0.9); }
}

.toast.success { border-left: 3px solid var(--success); }
.toast.error   { border-left: 3px solid var(--danger); }
.toast.info    { border-left: 3px solid var(--accent); }

/* ══════════════════════════════════════════════
   CONTENT SPLIT (Chat + Calendar)
══════════════════════════════════════════════ */
.content-split {
  flex: 1;
  display: flex;
  overflow: hidden;
  min-height: 0;
}

.chat-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

/* ══════════════════════════════════════════════
   CALENDAR PANEL
══════════════════════════════════════════════ */
.calendar-panel {
  width: 320px;
  min-width: 320px;
  background: var(--bg-surface);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 20px 16px 16px;
  overflow-y: auto;
  gap: 14px;
  transition: var(--transition);
}

.calendar-panel.hidden {
  display: none;
}

/* Calendar Header */
.cal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.cal-month-year {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  text-align: center;
  flex: 1;
}

.cal-nav-btn {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  width: 30px; height: 30px;
  display: grid; place-items: center;
  transition: var(--transition);
  flex-shrink: 0;
}
.cal-nav-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--bg-hover);
}

/* Weekday Labels */
.cal-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
  margin-bottom: 4px;
}

.cal-weekdays span {
  font-size: 0.62rem;
  font-weight: 600;
  color: var(--text-muted);
  text-align: center;
  padding: 4px 0;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Calendar Grid */
.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 3px;
}

.cal-cell {
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 4px 2px 3px;
  gap: 2px;
  transition: var(--transition);
  position: relative;
  min-height: 36px;
}

.cal-cell.empty {
  background: transparent;
}

.cal-cell:not(.empty) {
  background: var(--bg-elevated);
  border: 1px solid transparent;
}

.cal-cell:not(.empty):hover {
  background: var(--bg-hover);
  border-color: var(--border-bright);
  transform: scale(1.04);
}

.cal-cell.today {
  background: rgba(79, 142, 247, 0.12) !important;
  border-color: var(--accent) !important;
}

.cal-cell.today .cal-day-num {
  color: var(--accent);
  font-weight: 700;
}

.cal-cell.has-events {
  border-color: var(--border-bright);
}

.cal-day-num {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1;
}

/* Event dots inside calendar cells */
.cal-dots {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  justify-content: center;
  align-items: center;
  max-width: 100%;
}

.cal-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  flex-shrink: 0;
  display: inline-block;
}
.cal-dot.meeting  { background: var(--meeting-c); }
.cal-dot.class    { background: var(--class-c); }
.cal-dot.reminder { background: var(--reminder-c); }
.cal-dot.work     { background: var(--work-c); }
.cal-dot.personal { background: var(--personal-c); }
.cal-dot.other    { background: var(--other-c); }

.cal-more {
  font-size: 0.55rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* Calendar Legend */
.cal-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

.cal-legend-item {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.67rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.cal-legend-item .cal-dot {
  width: 7px;
  height: 7px;
}

/* Calendar toggle button active state */
.icon-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 0 12px var(--accent-glow);
}

/* ══════════════════════════════════════════════
   CALENDAR DATE POPUP
══════════════════════════════════════════════ */
.cal-popup-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  backdrop-filter: blur(6px);
  z-index: 600;
  display: grid;
  place-items: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
}
.cal-popup-overlay.open { opacity: 1; pointer-events: auto; }

.cal-popup {
  background: var(--bg-surface);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 380px;
  box-shadow: var(--shadow-lg);
  transform: scale(0.92) translateY(20px);
  transition: transform 0.3s cubic-bezier(0.34,1.2,0.64,1);
  overflow: hidden;
}
.cal-popup-overlay.open .cal-popup { transform: scale(1) translateY(0); }

.cal-popup-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px 14px;
  border-bottom: 1px solid var(--border);
}

.cal-popup-header h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.cal-popup-body {
  padding: 14px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 60vh;
  overflow-y: auto;
}

.cal-popup-empty {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.82rem;
  padding: 20px 0;
}

.cal-popup-event {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  transition: var(--transition);
}
.cal-popup-event:hover { border-color: var(--border-bright); background: var(--bg-hover); }

.cal-popup-event-icon {
  width: 38px; height: 38px;
  border-radius: 10px;
  display: grid; place-items: center;
  font-size: 1rem;
  flex-shrink: 0;
}
.cal-popup-event-icon.meeting  { background: rgba(79,142,247,0.15); }
.cal-popup-event-icon.class    { background: rgba(167,139,250,0.15); }
.cal-popup-event-icon.reminder { background: rgba(249,199,79,0.15); }
.cal-popup-event-icon.work     { background: rgba(61,214,140,0.15); }
.cal-popup-event-icon.personal { background: rgba(251,139,116,0.15); }
.cal-popup-event-icon.other    { background: rgba(138,149,168,0.15); }

.cal-popup-event-info {
  flex: 1;
  min-width: 0;
}

.cal-popup-event-title {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 3px;
}

.cal-popup-event-meta {
  font-size: 0.72rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

.cal-popup-del-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  display: grid; place-items: center;
  transition: var(--transition);
  flex-shrink: 0;
}
.cal-popup-del-btn:hover { color: var(--danger); background: rgba(247,107,107,0.1); }

/* ══════════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════════ */
@media (max-width: 1100px) {
  .calendar-panel {
    width: 280px;
    min-width: 280px;
  }
}

@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    transform: translateX(-100%);
    z-index: 200;
    box-shadow: var(--shadow-lg);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-close { display: grid; }

  .overlay.show { display: block; }

  .menu-btn { display: grid; }

  .bubble-wrap { max-width: 85%; }

  .welcome-card { max-width: 92%; }

  .chat-window { padding: 16px 14px; }

  .input-area { padding: 10px 14px 12px; }

  .suggestion-bar { padding: 8px 14px; }

  /* Calendar collapses to bottom sheet on mobile */
  .calendar-panel {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    width: 100%;
    min-width: unset;
    height: 50vh;
    border-left: none;
    border-top: 1px solid var(--border);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    z-index: 180;
    transform: translateY(100%);
    transition: transform 0.35s cubic-bezier(0.4,0,0.2,1);
    box-shadow: var(--shadow-lg);
  }

  .calendar-panel:not(.hidden) {
    transform: translateY(0);
  }

  .calendar-panel.hidden {
    display: flex;
    transform: translateY(100%);
  }
}