/* ===================================================
   MindLink - Design System
   三日月☾と太陽☀のモチーフ、ライト/ダークテーマ
   =================================================== */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600;700&display=swap');

/* ── CSS Variables: Dark Theme (default) ── */
:root,
[data-theme="dark"] {
  --color-bg:           #070c1a;
  --color-bg-2:         #0d1424;
  --color-surface:      #111827;
  --color-surface-2:    #1a2235;
  --color-border:       #1e2d4a;
  --color-border-light: #243450;

  --color-text:         #e2e8f0;
  --color-text-2:       #94a3b8;
  --color-text-3:       #64748b;

  --color-accent:       #818cf8;
  --color-accent-2:     #c084fc;
  --color-accent-glow:  rgba(129, 140, 248, 0.25);
  --color-accent-dark:  rgba(129, 140, 248, 0.1);

  --color-moon:         #fbbf24;
  --color-moon-glow:    rgba(251, 191, 36, 0.2);
  --color-sun:          #f59e0b;

  --color-user-bubble:  #1e1b4b;
  --color-user-border:  #3730a3;
  --color-ai-bubble:    #0f1523;
  --color-ai-border:    #1e2d4a;

  --color-success:      #10b981;
  --color-danger:       #f87171;
  --color-warning:      #fbbf24;

  --color-sidebar:      #090e1c;
  --color-sidebar-hover: rgba(129, 140, 248, 0.08);
  --color-sidebar-active: rgba(129, 140, 248, 0.15);

  --shadow-sm:   0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:   0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:   0 8px 32px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 20px rgba(129, 140, 248, 0.15);

  --hljs-theme-url: url('https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/atom-one-dark.min.css');

  /* ── Danger alpha variants ── */
  --color-danger-bg:         rgba(248, 113, 113, 0.1);
  --color-danger-bg-hover:   rgba(248, 113, 113, 0.2);

  /* ── Fallback badge ── */
  --color-fallback:          #f59e0b;
  --color-fallback-bg:       rgba(245, 158, 11, 0.08);
  --color-fallback-border:   rgba(245, 158, 11, 0.15);

  /* ── Like button active ── */
  --color-like-active:       #f43f5e;
  --color-like-active-bg:    rgba(244, 63, 94, 0.08);

  /* ── Accent glow / overlay variants ── */
  --color-accent-faint:      rgba(129, 140, 248, 0.06);
  --color-accent-glow-icon:  rgba(167, 139, 250, 0.4);
  --color-accent-glow-sm:    rgba(167, 139, 250, 0.3);
  --color-auth-overlay-1:    rgba(124, 58, 237, 0.15);
  --color-auth-overlay-2:    rgba(192, 132, 252, 0.1);

  /* ── Chat area fixed background (not overridden by color themes) ── */
  --color-chat-bg:           #070c1a;
}

/* ── CSS Variables: Light Theme ── */
[data-theme="light"] {
  --color-bg:           #fafafa;
  --color-bg-2:         #f5f0f8;
  --color-surface:      #ffffff;
  --color-surface-2:    #f8f5fc;
  --color-border:       #e8ddf5;
  --color-border-light: #ede8f5;

  --color-text:         #1a1625;
  --color-text-2:       #5b4f72;
  --color-text-3:       #8b7da8;

  --color-accent:       #6d28d9;
  --color-accent-2:     #9333ea;
  --color-accent-glow:  rgba(109, 40, 217, 0.15);
  --color-accent-dark:  rgba(109, 40, 217, 0.08);

  --color-moon:         #d97706;
  --color-moon-glow:    rgba(217, 119, 6, 0.15);
  --color-sun:          #fbbf24;

  --color-user-bubble:  #f0ebfe;
  --color-user-border:  #d8b4fe;
  --color-ai-bubble:    #ffffff;
  --color-ai-border:    #e8ddf5;

  --color-success:      #059669;
  --color-danger:       #dc2626;
  --color-warning:      #d97706;

  --color-sidebar:      #f5f0fb;
  --color-sidebar-hover: rgba(109, 40, 217, 0.06);
  --color-sidebar-active: rgba(109, 40, 217, 0.12);

  --shadow-sm:   0 1px 3px rgba(0,0,0,0.08);
  --shadow-md:   0 4px 16px rgba(0,0,0,0.1);
  --shadow-lg:   0 8px 32px rgba(0,0,0,0.12);
  --shadow-glow: 0 0 20px rgba(109, 40, 217, 0.1);

  /* ── Danger alpha variants ── */
  --color-danger-bg:         rgba(220, 38, 38, 0.08);
  --color-danger-bg-hover:   rgba(220, 38, 38, 0.15);

  /* ── Fallback badge ── */
  --color-fallback:          #d97706;
  --color-fallback-bg:       rgba(217, 119, 6, 0.08);
  --color-fallback-border:   rgba(217, 119, 6, 0.15);

  /* ── Like button active ── */
  --color-like-active:       #e11d48;
  --color-like-active-bg:    rgba(225, 29, 72, 0.08);

  /* ── Accent glow / overlay variants ── */
  --color-accent-faint:      rgba(109, 40, 217, 0.04);
  --color-accent-glow-icon:  rgba(109, 40, 217, 0.3);
  --color-accent-glow-sm:    rgba(109, 40, 217, 0.2);
  --color-auth-overlay-1:    rgba(109, 40, 217, 0.1);
  --color-auth-overlay-2:    rgba(147, 51, 234, 0.08);

  /* ── Chat area fixed background (not overridden by color themes) ── */
  --color-chat-bg:           #fafafa;
}

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

html {
  height: 100%;
  font-size: 14px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Noto Sans JP', 'Inter', system-ui, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  height: 100%;
  overflow: hidden;
  transition: background 0.3s ease, color 0.3s ease;
  -webkit-font-smoothing: antialiased;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-accent); }

/* ── Auth Screen ── */
.auth-screen, .setup-screen {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-bg);
  transition: opacity 0.4s ease, transform 0.4s ease;
}
.auth-screen.hidden, .setup-screen.hidden {
  opacity: 0; pointer-events: none; transform: scale(0.97);
}

.auth-bg {
  position: absolute; inset: 0; overflow: hidden;
  background: radial-gradient(ellipse at 30% 20%, var(--color-auth-overlay-1) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 80%, var(--color-auth-overlay-2) 0%, transparent 60%);
}
.auth-glow {
  position: absolute; width: 600px; height: 600px;
  top: 50%; left: 50%; transform: translate(-50%, -50%);
  background: radial-gradient(circle, var(--color-accent-faint) 0%, transparent 70%);
  border-radius: 50%;
  animation: pulse-glow 4s ease-in-out infinite;
}

.star {
  position: absolute; border-radius: 50%;
  background: white; opacity: 0;
  animation: twinkle 3s ease-in-out infinite;
}
.star-1 { width: 2px; height: 2px; top: 15%; left: 20%; animation-delay: 0s; }
.star-2 { width: 3px; height: 3px; top: 25%; left: 75%; animation-delay: 0.7s; }
.star-3 { width: 2px; height: 2px; top: 60%; left: 10%; animation-delay: 1.4s; }
.star-4 { width: 2px; height: 2px; top: 70%; left: 85%; animation-delay: 2.1s; }
.star-5 { width: 3px; height: 3px; top: 40%; left: 90%; animation-delay: 0.3s; }

@keyframes twinkle {
  0%, 100% { opacity: 0; transform: scale(1); }
  50% { opacity: 0.8; transform: scale(1.5); }
}
@keyframes pulse-glow {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
  50% { transform: translate(-50%, -50%) scale(1.1); opacity: 0.8; }
}

.auth-card, .setup-card {
  position: relative; z-index: 1;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 24px;
  padding: 48px 40px;
  width: 100%; max-width: 380px;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  text-align: center;
}
.setup-card { max-width: 440px; }

.auth-logo { margin-bottom: 16px; }
.logo-svg {
  width: 72px; height: 72px;
  filter: drop-shadow(0 0 12px var(--color-accent-glow-icon));
  animation: float 4s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-6px); }
}

.auth-title {
  font-size: 1.8rem; font-weight: 700;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 6px; letter-spacing: 0.02em;
}
.auth-subtitle { color: var(--color-text-2); font-size: 0.9rem; margin-bottom: 32px; }

/* PIN Display */
.pin-display {
  display: flex; gap: 12px; justify-content: center; margin-bottom: 16px;
}
.pin-dot {
  width: 14px; height: 14px; border-radius: 50%;
  border: 2px solid var(--color-border);
  transition: all 0.15s ease;
}
.pin-dot.filled {
  background: var(--color-accent);
  border-color: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent-glow);
  transform: scale(1.1);
}
.pin-dot.shake { animation: shake 0.4s ease; }

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

.pin-error {
  color: var(--color-danger); font-size: 0.85rem; min-height: 20px; margin-bottom: 8px;
  transition: opacity 0.2s;
}

/* PIN Keypad */
.pin-keypad {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px;
  max-width: 240px; margin: 0 auto;
}
.pin-key {
  aspect-ratio: 1; border-radius: 50%;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  color: var(--color-text); font-size: 1.2rem; font-weight: 500;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: all 0.12s ease;
  font-family: inherit;
  -webkit-tap-highlight-color: transparent;
}
.pin-key:hover { background: var(--color-accent-dark); border-color: var(--color-accent); }
.pin-key:active { transform: scale(0.92); background: var(--color-accent); color: white; }
.pin-key-empty { background: transparent; border-color: transparent; pointer-events: none; }
.pin-key-delete { font-size: 0.9rem; }
.pin-key-delete svg { width: 18px; height: 18px; }

/* Auth label */
.auth-label { color: var(--color-text-2); font-size: 0.9rem; margin-bottom: 16px; }

/* Setup Steps */
.setup-steps { text-align: left; }
.setup-step { display: none; }
.setup-step.active { display: block; }
.setup-step h3 {
  font-size: 1rem; font-weight: 600; color: var(--color-accent);
  margin-bottom: 8px;
}
.step-desc { color: var(--color-text-2); font-size: 0.85rem; margin-bottom: 20px; line-height: 1.6; }

/* Input Group */
.input-group { position: relative; }
.input-group .setup-input { padding-right: 44px; }
.toggle-visibility {
  position: absolute; right: 12px; top: 50%; transform: translateY(-50%);
  background: none; border: none; color: var(--color-text-3); cursor: pointer;
  padding: 4px;
  transition: color 0.2s;
}
.toggle-visibility:hover { color: var(--color-accent); }

.api-key-hint { font-size: 0.8rem; color: var(--color-text-3); margin-top: 8px; }
.api-key-hint a { color: var(--color-accent); text-decoration: none; }
.api-key-hint a:hover { text-decoration: underline; }

/* ── Main App Layout ── */
.app-container {
  display: flex; height: 100vh; overflow: hidden;
  opacity: 0; pointer-events: none; transition: opacity 0.4s ease;
}
.app-container.active { opacity: 1; pointer-events: all; }

/* ── Sidebar ── */
.sidebar {
  width: 260px; min-width: 260px;
  background: var(--color-sidebar);
  border-right: 1px solid var(--color-border);
  display: flex; flex-direction: column;
  transition: transform 0.3s ease;
  height: 100vh; overflow: hidden;
}

.sidebar-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 16px 12px;
  border-bottom: 1px solid var(--color-border);
}
.sidebar-logo {
  display: flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: 1rem;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.btn-new-thread {
  margin: 12px; padding: 10px 16px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
  border: none; border-radius: 12px; color: white;
  font-family: inherit; font-size: 0.88rem; font-weight: 500;
  cursor: pointer; display: flex; align-items: center; gap: 8px;
  justify-content: center; transition: all 0.2s ease;
  box-shadow: 0 4px 12px var(--color-accent-glow);
}
.btn-new-thread:hover { transform: translateY(-1px); box-shadow: 0 6px 16px var(--color-accent-glow); }
.btn-new-thread:active { transform: translateY(0); }

.sidebar-search {
  margin: 0 12px 8px; padding: 8px 12px;
  background: var(--color-surface-2); border: 1px solid var(--color-border);
  border-radius: 10px; display: flex; align-items: center; gap: 8px;
}
.search-input {
  flex: 1; background: none; border: none; outline: none;
  color: var(--color-text); font-family: inherit; font-size: 0.85rem;
}
.search-input::placeholder { color: var(--color-text-3); }
.sidebar-search svg { color: var(--color-text-3); flex-shrink: 0; }

/* Thread List */
.thread-list {
  flex: 1; overflow-y: auto; padding: 4px 8px;
}

.thread-section-label {
  font-size: 0.72rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--color-text-3);
  padding: 12px 8px 4px;
}

.thread-item {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 10px; border-radius: 10px; cursor: pointer;
  transition: background 0.15s ease; position: relative;
  margin-bottom: 2px;
}
.thread-item:hover { background: var(--color-sidebar-hover); }
.thread-item.active { background: var(--color-sidebar-active); }
.thread-item.pinned .thread-item-title::before {
  content: "📌 ";
  font-size: 0.75em;
}
.thread-item-avatar {
  font-size: 1.1rem; width: 28px; text-align: center; flex-shrink: 0;
}
.thread-item-body { flex: 1; min-width: 0; }
.thread-item-title {
  font-size: 0.85rem; font-weight: 500; color: var(--color-text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.thread-item.active .thread-item-title { color: var(--color-accent); }
.thread-item-date { font-size: 0.75rem; color: var(--color-text-3); margin-top: 2px; }
.thread-item-actions {
  display: none; gap: 4px;
}
.thread-item:hover .thread-item-actions { display: flex; }
.thread-item-action-btn {
  background: none; border: none; color: var(--color-text-3);
  cursor: pointer; padding: 2px; border-radius: 4px;
  transition: color 0.15s;
}
.thread-item-action-btn:hover { color: var(--color-accent); }

/* Sidebar Footer */
.sidebar-footer {
  border-top: 1px solid var(--color-border);
  padding: 8px;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 4px;
}
.sidebar-footer-btn {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  padding: 8px 4px; border-radius: 10px;
  background: none; border: none; color: var(--color-text-2);
  cursor: pointer; font-family: inherit; font-size: 0.72rem;
  transition: all 0.15s ease;
}
.sidebar-footer-btn:hover {
  background: var(--color-sidebar-hover); color: var(--color-accent);
}
.sidebar-footer-btn svg { color: inherit; }

.sidebar-version-tag {
  font-size: 0.65rem;
  color: var(--color-text-3);
  text-align: center;
  padding: 8px 0;
  opacity: 0.6;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
}

/* ── Main Content ── */
.main-content {
  flex: 1; display: flex; flex-direction: column; overflow: hidden;
  background: var(--color-bg);
}

/* Chat Header */
.chat-header {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  backdrop-filter: blur(8px);
}
.chat-header-info { flex: 1; min-width: 0; }
.current-thread-title {
  font-size: 0.95rem; font-weight: 600;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.current-persona-name {
  font-size: 0.78rem; color: var(--color-text-3);
  display: flex; align-items: center; gap: 4px;
}
.chat-header-sub {
  display: flex; align-items: center; gap: 8px; margin-top: 2px;
}
.thread-model-select {
  background: transparent;
  border: none;
  font-size: 0.75rem;
  color: var(--color-text-3);
  cursor: pointer;
  padding: 0 4px;
  border-radius: 4px;
  max-width: 150px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  outline: none;
  transition: background 0.2s;
}
.thread-model-select:hover {
  background: rgba(128, 128, 128, 0.1);
}
.thread-model-select option {
  background: var(--color-surface);
  color: var(--color-text);
}
.chat-header-actions { display: flex; align-items: center; gap: 4px; }

/* Theme Toggle */
.theme-toggle { position: relative; }
.theme-icon-sun, .theme-icon-moon {
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.3s, transform 0.3s;
}
[data-theme="dark"] .theme-icon-moon { display: none; }
[data-theme="dark"] .theme-icon-sun { display: flex; }
[data-theme="light"] .theme-icon-sun { display: none; }
[data-theme="light"] .theme-icon-moon { display: flex; }

/* ── Messages Area ── */
.messages-area {
  flex: 1; overflow-y: auto; padding: 24px 0;
  display: flex; flex-direction: column;
  background: var(--color-chat-bg);
}

/* Welcome State */
.welcome-state {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 40px 20px; text-align: center;
}
.welcome-icon { margin-bottom: 20px; filter: drop-shadow(0 4px 16px var(--color-accent-glow-sm)); animation: float 4s ease-in-out infinite; }
.welcome-title { font-size: 1.5rem; font-weight: 700; margin-bottom: 8px; }
.welcome-subtitle { color: var(--color-text-2); margin-bottom: 24px; }
.welcome-suggestions { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.suggestion-chip {
  padding: 10px 16px; border-radius: 20px;
  background: var(--color-surface); border: 1px solid var(--color-border);
  color: var(--color-text-2); cursor: pointer; font-family: inherit; font-size: 0.85rem;
  transition: all 0.2s ease;
}
.suggestion-chip:hover {
  background: var(--color-accent-dark); border-color: var(--color-accent);
  color: var(--color-accent); transform: translateY(-2px);
}

/* Messages */
.message-wrapper {
  padding: 4px 20px; max-width: 800px; width: 100%; margin: 0 auto;
  animation: message-in 0.25s ease;
}
@keyframes message-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.message {
  display: flex; gap: 12px; align-items: flex-start;
}
.message.user { flex-direction: row-reverse; }

.message-avatar {
  width: 32px; height: 32px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  background: var(--color-surface-2);
  overflow: hidden;
}
.message.user .message-avatar {
  background: var(--color-user-bubble);
  border-color: var(--color-user-border);
}

.message-content { max-width: calc(100% - 56px); }
.message-role {
  font-size: 0.75rem; color: var(--color-text-3); margin-bottom: 4px; font-weight: 500;
}
.message.user .message-role { text-align: right; }

.message-bubble {
  padding: 12px 16px; border-radius: 16px;
  border: 1px solid var(--color-ai-border);
  background: var(--color-ai-bubble);
  font-size: 0.9rem; line-height: 1.65;
  color: var(--color-text);
  position: relative;
  overflow-wrap: break-word;
  word-break: break-word;
  min-width: 0;
}
.message.user .message-bubble {
  background: var(--color-user-bubble);
  border-color: var(--color-user-border);
  border-radius: 16px 16px 4px 16px;
}
.message.assistant .message-bubble {
  border-radius: 16px 16px 16px 4px;
}

.fallback-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 0.68rem;
  color: var(--color-fallback);
  background: var(--color-fallback-bg);
  padding: 2px 6px;
  border-radius: 6px;
  margin-top: 8px;
  font-weight: 500;
  border: 1px solid var(--color-fallback-border);
  width: fit-content;
}

.message-bubble-container {
  display: flex;
  align-items: flex-end;
  gap: 8px;
}
.message.user .message-bubble-container {
  flex-direction: row-reverse;
}

.message-time {
  font-size: 0.7rem;
  color: var(--color-text-3);
  margin-bottom: 4px;
  white-space: nowrap;
  font-family: 'Inter', sans-serif;
  letter-spacing: 0.02em;
}

/* Markdown in bubbles */
.message-bubble p { margin-bottom: 8px; }
.message-bubble p:last-child { margin-bottom: 0; }
.message-bubble ul, .message-bubble ol { padding-left: 20px; margin-bottom: 8px; }
.message-bubble li { margin-bottom: 4px; }
.message-bubble strong { font-weight: 600; }
.message-bubble em { font-style: italic; }
.message-bubble h1, .message-bubble h2, .message-bubble h3 {
  font-weight: 600; margin: 12px 0 6px;
}
.message-bubble h1 { font-size: 1.2em; }
.message-bubble h2 { font-size: 1.1em; }
.message-bubble h3 { font-size: 1em; }
.message-bubble code:not(pre code) {
  background: var(--color-surface-2); padding: 1px 6px;
  border-radius: 4px; font-size: 0.85em; font-family: monospace;
  border: 1px solid var(--color-border);
}
.message-bubble pre {
  margin: 8px 0; border-radius: 10px; overflow: hidden;
  border: 1px solid var(--color-border);
}
.message-bubble pre code { font-size: 0.83rem; }
.message-bubble blockquote {
  border-left: 3px solid var(--color-accent); padding-left: 12px;
  color: var(--color-text-2); margin: 8px 0;
}
.message-bubble table { border-collapse: collapse; width: 100%; margin: 8px 0; }
.message-bubble th, .message-bubble td {
  border: 1px solid var(--color-border); padding: 6px 10px;
  font-size: 0.88rem;
}
.message-bubble th { background: var(--color-surface-2); font-weight: 600; }

/* Code copy button */
.code-block-wrapper { position: relative; }
.code-copy-btn {
  position: absolute; top: 8px; right: 8px;
  background: var(--color-surface-2); border: 1px solid var(--color-border);
  color: var(--color-text-2); padding: 4px 8px; border-radius: 6px;
  font-size: 0.75rem; cursor: pointer; transition: all 0.2s;
  font-family: inherit;
}
.code-copy-btn:hover { background: var(--color-accent); color: white; border-color: var(--color-accent); }

/* Message Actions */
.message-actions {
  display: flex; gap: 4px; margin-top: 6px; opacity: 0;
  transition: opacity 0.2s;
}
.message-wrapper:hover .message-actions { opacity: 1; }
.message.user .message-actions { justify-content: flex-end; }
.message-action-btn {
  background: var(--color-surface); border: 1px solid var(--color-border);
  color: var(--color-text-3); padding: 4px 8px; border-radius: 8px;
  font-size: 0.75rem; cursor: pointer; transition: all 0.15s;
  display: flex; align-items: center; gap: 4px;
  font-family: inherit;
}
.message-action-btn:hover { background: var(--color-accent-dark); color: var(--color-accent); border-color: var(--color-accent); }
.message-action-btn.like-btn.liked { color: var(--color-like-active); border-color: var(--color-like-active); background: var(--color-like-active-bg); }
.message-action-btn.like-btn .like-count { font-size: 0.75rem; }

/* Typing indicator */
.typing-indicator {
  display: flex; gap: 4px; align-items: center; padding: 12px 16px;
}
.typing-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--color-accent);
  animation: typing-bounce 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 typing-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-8px); opacity: 1; }
}

/* Streaming cursor */
.streaming-cursor {
  display: inline-block; width: 2px; height: 1em;
  background: var(--color-accent); margin-left: 2px;
  animation: blink 0.8s step-end infinite;
  vertical-align: middle;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

/* ── Input Area ── */
.input-area {
  padding: 12px 20px 20px;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}
.input-wrapper {
  max-width: 800px; margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  transition: border-color 0.2s, box-shadow 0.2s;
  overflow: hidden;
}
.input-wrapper:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}
.input-actions-top {
  display: flex; gap: 4px; padding: 8px 8px 0;
}
.input-action-btn {
  padding: 4px 8px; border-radius: 8px;
  background: none; border: 1px solid var(--color-border);
  color: var(--color-text-3); cursor: pointer;
  transition: all 0.15s; font-size: 0.75rem;
  font-family: inherit;
}
.input-action-btn:hover { color: var(--color-accent); border-color: var(--color-accent); background: var(--color-accent-dark); }

.message-input {
  width: 100%; background: none; border: none; outline: none;
  color: var(--color-text); font-family: inherit; font-size: 0.9rem;
  line-height: 1.6; resize: none; padding: 10px 16px;
  min-height: 44px; max-height: 200px; overflow-y: auto;
}
.message-input::placeholder { color: var(--color-text-3); }

.input-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 8px 8px;
}
.char-count { font-size: 0.75rem; color: var(--color-text-3); }

/* File Preview Area */
.file-preview-area {
  display: flex; gap: 8px; padding: 8px 12px; flex-wrap: wrap;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface-2);
}
.file-preview-area:empty { display: none; }
.file-preview-item {
  position: relative; width: 60px; height: 60px;
  border-radius: 8px; border: 1px solid var(--color-border);
  background-size: cover; background-position: center;
}
.file-preview-remove {
  position: absolute; top: -6px; right: -6px;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--color-danger); color: white;
  border: none; cursor: pointer; display: flex;
  align-items: center; justify-content: center; font-size: 12px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}
.message-attachment {
  margin-top: 8px; max-width: 100%; border-radius: 8px;
  overflow: hidden; border: 1px solid var(--color-border);
}
.message-attachment img {
  display: block; max-width: 100%; max-height: 300px;
  object-fit: contain; cursor: pointer;
}
.message-attachment-file {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px; background: var(--color-surface-2);
  font-size: 0.85rem; text-decoration: none; color: var(--color-text);
}
.message-attachment-file:hover { color: var(--color-accent); }

/* ── 生成画像（画像生成機能） ── */
.generated-image-slot { position: relative; }
.generated-image {
  display: block; max-width: 100%; max-height: 360px; object-fit: contain;
}
.generated-image-loading,
.generated-image-expired {
  padding: 18px 14px; font-size: 0.85rem; color: var(--color-text-2);
  background: var(--color-surface-2); text-align: center;
}
.generated-image-save-btn {
  position: absolute; right: 8px; bottom: 8px;
  padding: 5px 10px; font-size: 0.8rem; border: none; border-radius: 8px;
  background: rgba(0, 0, 0, 0.55); color: #fff; cursor: pointer;
}
.generated-image-save-btn:active { transform: scale(0.96); }

/* ── 参照画像ライブラリ（設定画面） ── */
#reference-image-list { display: flex; flex-direction: column; gap: 8px; margin: 10px 0; }
.reference-image-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px; border: 1px solid var(--color-border); border-radius: 10px;
  background: var(--color-surface-2);
}
.reference-image-thumb {
  width: 48px; height: 48px; border-radius: 8px; object-fit: cover; flex-shrink: 0;
  border: 1px solid var(--color-border);
}
.reference-image-name {
  flex: 1; min-width: 0; padding: 6px 8px; font-size: 0.9rem;
  border: 1px solid var(--color-border); border-radius: 8px;
  background: var(--color-surface); color: var(--color-text);
}
.reference-image-pin-btn,
.reference-image-delete-btn {
  border: none; background: transparent; font-size: 1.05rem; cursor: pointer;
  padding: 6px; border-radius: 8px; opacity: 0.55;
}
.reference-image-pin-btn.pinned { opacity: 1; }
.reference-image-pin-btn:hover,
.reference-image-delete-btn:hover { background: var(--color-surface); opacity: 1; }

.btn-send {
  width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
  border: none; color: white; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s ease;
  box-shadow: 0 2px 8px var(--color-accent-glow);
}
.btn-send:hover { transform: scale(1.05); box-shadow: 0 4px 12px var(--color-accent-glow); }
.btn-send:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }
.btn-send:active { transform: scale(0.95); }

/* ── Buttons ── */
.btn-icon {
  background: none; border: none; color: var(--color-text-2); cursor: pointer;
  padding: 8px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.15s ease;
}
.btn-icon:hover { background: var(--color-surface-2); color: var(--color-accent); }

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
  border: none; color: white; padding: 12px 24px;
  border-radius: 12px; cursor: pointer; font-family: inherit;
  font-size: 0.9rem; font-weight: 500; width: 100%;
  transition: all 0.2s ease;
  box-shadow: 0 4px 12px var(--color-accent-glow);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 16px var(--color-accent-glow); }
.btn-primary:active { transform: translateY(0); }
.btn-primary.btn-sm { padding: 8px 16px; font-size: 0.82rem; width: auto; }

.btn-secondary {
  background: var(--color-surface-2); border: 1px solid var(--color-border);
  color: var(--color-text); padding: 10px 20px; border-radius: 12px;
  cursor: pointer; font-family: inherit; font-size: 0.88rem; font-weight: 500;
  transition: all 0.15s; display: inline-flex; align-items: center; gap: 6px;
}
.btn-secondary:hover { border-color: var(--color-accent); color: var(--color-accent); }

.btn-danger {
  background: var(--color-danger-bg); border: 1px solid var(--color-danger);
  color: var(--color-danger); padding: 10px 20px; border-radius: 12px;
  cursor: pointer; font-family: inherit; font-size: 0.88rem; font-weight: 500;
  transition: all 0.15s; width: 100%;
}
.btn-danger:hover { background: var(--color-danger-bg-hover); }

.mt-2 { margin-top: 8px; }

/* ── Modals ── */
.modal-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  opacity: 0; pointer-events: none;
  transition: opacity 0.25s ease;
}
.modal-overlay.active { opacity: 1; pointer-events: all; }

.modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px; width: 100%;
  box-shadow: var(--shadow-lg);
  max-height: 85vh; overflow: hidden;
  display: flex; flex-direction: column;
  transform: scale(0.96) translateY(8px);
  transition: transform 0.25s ease;
}
.modal-overlay.active .modal { transform: scale(1) translateY(0); }

.settings-modal-content { max-width: 520px; }
.memory-modal-content { max-width: 560px; }
.add-memory-modal-content { max-width: 460px; }
.persona-modal-content { max-width: 560px; }
.edit-persona-modal-content { max-width: 520px; }
.archive-modal-content { max-width: 480px; }
.rename-modal-content { max-width: 400px; }
.change-pin-modal-content { max-width: 400px; }

.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px; border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}
.modal-header h2 { font-size: 1.05rem; font-weight: 600; }

.modal-body { padding: 20px 24px; overflow-y: auto; flex: 1; }
.modal-actions { display: flex; gap: 10px; margin-top: 16px; justify-content: flex-end; }
.modal-actions .btn-secondary { width: auto; }
.modal-actions .btn-primary { width: auto; }

/* Settings Tabs */
.settings-tabs { display: flex; gap: 4px; margin-bottom: 20px; background: var(--color-surface-2); padding: 4px; border-radius: 12px; }
.settings-tab {
  flex: 1; padding: 8px; border-radius: 8px; background: none; border: none;
  color: var(--color-text-3); cursor: pointer; font-family: inherit; font-size: 0.82rem;
  transition: all 0.15s;
}
.settings-tab.active { background: var(--color-surface); color: var(--color-accent); font-weight: 600; box-shadow: var(--shadow-sm); }
.settings-panel { display: none; }
.settings-panel.active { display: block; }

/* Setting Groups */
.setting-group { margin-bottom: 20px; }
.setting-label {
  display: block; font-size: 0.85rem; font-weight: 500;
  color: var(--color-text-2); margin-bottom: 8px;
}
.setting-hint { font-size: 0.78rem; color: var(--color-text-3); margin-top: 6px; line-height: 1.5; }
.setting-select {
  width: 100%; padding: 10px 12px; border-radius: 10px;
  background: var(--color-surface-2); border: 1px solid var(--color-border);
  color: var(--color-text); font-family: inherit; font-size: 0.88rem;
  cursor: pointer; transition: border-color 0.2s;
}
.setting-select:focus { outline: none; border-color: var(--color-accent); }
.setting-slider-wrapper { display: flex; gap: 12px; align-items: center; }
.setting-slider {
  flex: 1; -webkit-appearance: none; height: 4px;
  background: var(--color-border); border-radius: 2px; cursor: pointer;
  transition: background 0.2s;
}
.setting-slider::-webkit-slider-thumb {
  -webkit-appearance: none; width: 18px; height: 18px; border-radius: 50%;
  background: var(--color-accent); cursor: pointer;
  box-shadow: 0 0 6px var(--color-accent-glow);
}
.setting-value { font-size: 0.85rem; color: var(--color-accent); font-weight: 600; min-width: 42px; text-align: right; }
.setup-input {
  width: 100%; padding: 10px 14px; border-radius: 10px;
  background: var(--color-surface-2); border: 1px solid var(--color-border);
  color: var(--color-text); font-family: inherit; font-size: 0.88rem;
  transition: all 0.2s;
}
.setup-input:focus { outline: none; border-color: var(--color-accent); box-shadow: 0 0 0 3px var(--color-accent-glow); }
.textarea-input { resize: vertical; min-height: 80px; }
.danger-zone { padding-top: 16px; border-top: 1px solid var(--color-border); }

/* Theme Options */
.theme-options { display: flex; gap: 8px; }
.theme-option {
  flex: 1; padding: 12px 8px; border-radius: 12px;
  border: 1px solid var(--color-border); background: var(--color-surface-2);
  cursor: pointer; font-family: inherit; display: flex; flex-direction: column;
  align-items: center; gap: 6px; font-size: 0.8rem; color: var(--color-text-2);
  transition: all 0.15s;
}
.theme-option.active { border-color: var(--color-accent); color: var(--color-accent); background: var(--color-accent-dark); }
.theme-option-icon { font-size: 1.4rem; }

/* Color Theme Picker */
.color-theme-options {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
}
.color-theme-option {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 12px; border-radius: 12px;
  border: 1px solid var(--color-border); background: var(--color-surface-2);
  cursor: pointer; font-family: inherit; font-size: 0.82rem; color: var(--color-text-2);
  transition: all 0.15s;
  -webkit-tap-highlight-color: transparent;
}
.color-theme-option:hover { border-color: var(--color-accent); color: var(--color-accent); }
.color-theme-option.active {
  border-color: var(--color-accent); color: var(--color-accent);
  background: var(--color-accent-dark);
}
.color-theme-swatch {
  width: 14px; height: 14px; border-radius: 50%; flex-shrink: 0;
  border: 1px solid rgba(0, 0, 0, 0.15);
}
.cto-default { background: #818cf8; }
.cto-mauve   { background: #c09ac3; }
.cto-sage    { background: #92b89a; }
.cto-amber   { background: #cc9c78; }

@media (max-width: 700px) {
  .color-theme-options { grid-template-columns: 1fr 1fr; }
}

/* API test result */
.api-test-result { font-size: 0.85rem; margin-left: 10px; }
.api-test-result.success { color: var(--color-success); }
.api-test-result.error { color: var(--color-danger); }

/* Toggle Switch */
.toggle-switch { position: relative; display: inline-block; width: 44px; height: 24px; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute; inset: 0; background: var(--color-border);
  border-radius: 12px; cursor: pointer; transition: 0.3s;
}
.toggle-slider:before {
  content: ""; position: absolute; width: 18px; height: 18px; border-radius: 50%;
  background: white; left: 3px; top: 3px; transition: 0.3s;
  box-shadow: 0 1px 4px rgba(0,0,0,0.3);
}
.toggle-switch input:checked + .toggle-slider { background: var(--color-accent); }
.toggle-switch input:checked + .toggle-slider:before { transform: translateX(20px); }

/* Memory List */
.memory-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.memory-filter-tabs { display: flex; gap: 4px; flex-wrap: wrap; }
.filter-tab {
  padding: 6px 12px; border-radius: 20px; border: 1px solid var(--color-border);
  background: none; color: var(--color-text-3); cursor: pointer;
  font-family: inherit; font-size: 0.78rem; transition: all 0.15s;
}
.filter-tab.active { background: var(--color-accent-dark); border-color: var(--color-accent); color: var(--color-accent); }

.memory-list { display: flex; flex-direction: column; gap: 8px; }
.memory-item {
  padding: 12px; border-radius: 12px;
  background: var(--color-surface-2); border: 1px solid var(--color-border);
  display: flex; gap: 10px; align-items: flex-start;
  transition: border-color 0.15s;
}
.memory-item:hover { border-color: var(--color-accent); }
.memory-item-body { flex: 1; min-width: 0; }
.memory-item-content { font-size: 0.88rem; margin-bottom: 6px; line-height: 1.5; }
.memory-item-meta { font-size: 0.75rem; color: var(--color-text-3); display: flex; gap: 8px; flex-wrap: wrap; }
.memory-category-badge {
  padding: 2px 8px; border-radius: 10px; font-size: 0.72rem; font-weight: 500;
}
.category-profile { background: color-mix(in srgb, var(--color-accent) 15%, transparent); color: var(--color-accent); }
.category-preference { background: color-mix(in srgb, var(--color-accent-2) 15%, transparent); color: var(--color-accent-2); }
.category-knowledge { background: color-mix(in srgb, var(--color-success) 15%, transparent); color: var(--color-success); }
.category-other { background: color-mix(in srgb, var(--color-text-2) 15%, transparent); color: var(--color-text-2); }
.memory-item-actions { display: flex; gap: 4px; }
.memory-delete-btn {
  background: none; border: none; color: var(--color-text-3);
  cursor: pointer; padding: 4px; border-radius: 6px;
  transition: color 0.15s;
}
.memory-delete-btn:hover { color: var(--color-danger); }

/* Persona List */
.persona-list { display: flex; flex-direction: column; gap: 10px; margin-bottom: 16px; }
.persona-item {
  display: flex; align-items: center; gap: 12px;
  padding: 14px; border-radius: 14px;
  background: var(--color-surface-2); border: 1px solid var(--color-border);
  transition: all 0.15s; cursor: pointer; position: relative;
}
.persona-item:hover { border-color: var(--color-accent); }
.persona-item.active-persona { border-color: var(--color-accent); background: var(--color-accent-dark); }
.persona-avatar { font-size: 1.5rem; width: 40px; text-align: center; font-style: normal; }
.persona-body { flex: 1; min-width: 0; }
.persona-name { font-size: 0.9rem; font-weight: 600; }
.persona-desc { font-size: 0.78rem; color: var(--color-text-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.persona-actions { display: flex; gap: 4px; }
.persona-active-badge {
  font-size: 0.72rem; padding: 2px 8px; border-radius: 10px;
  background: var(--color-accent); color: white; font-weight: 500;
}

/* Avatar Picker */
.avatar-picker { display: flex; flex-direction: column; gap: 8px; }
.avatar-input { text-align: center; font-size: 1.2rem; }
.avatar-presets { display: flex; flex-wrap: wrap; gap: 6px; }
.avatar-preset {
  font-size: 1.2rem; width: 36px; height: 36px; border-radius: 8px;
  border: 1px solid var(--color-border); background: var(--color-surface-2);
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: all 0.15s;
}
.avatar-preset:hover { border-color: var(--color-accent); transform: scale(1.1); }
.avatar-preset.selected { border-color: var(--color-accent); background: var(--color-accent-dark); }

/* Archive List */
.archive-thread-list { display: flex; flex-direction: column; gap: 8px; }
.archive-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px; border-radius: 12px;
  background: var(--color-surface-2); border: 1px solid var(--color-border);
}
.archive-item-body { flex: 1; min-width: 0; }
.archive-item-title { font-size: 0.88rem; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.archive-item-date { font-size: 0.75rem; color: var(--color-text-3); margin-top: 2px; }
.archive-item-actions { display: flex; gap: 6px; }
.btn-restore {
  background: var(--color-accent-dark); border: 1px solid var(--color-accent);
  color: var(--color-accent); padding: 4px 10px; border-radius: 8px;
  font-size: 0.75rem; cursor: pointer; font-family: inherit; transition: all 0.15s;
}
.btn-restore:hover { background: var(--color-accent); color: white; }

/* Thread Context Menu - Unified Centered Modal */
#context-menu-overlay {
  position: fixed; inset: 0;
  z-index: 8999;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(2px);
}
.context-menu {
  position: fixed; z-index: 9000;
  top: 50% !important; left: 50% !important;
  transform: translate(-50%, -50%) scale(0.95) !important;
  background: var(--color-surface); 
  border: 1px solid var(--color-border);
  border-radius: 16px; padding: 10px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.5);
  min-width: 220px;
  opacity: 0; pointer-events: none;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}
.context-menu.active { 
  opacity: 1; pointer-events: all; 
  transform: translate(-50%, -50%) scale(1) !important; 
}
.context-menu-item {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 14px; border-radius: 10px; width: 100%;
  background: none; border: none; color: var(--color-text-2);
  cursor: pointer; font-family: inherit; font-size: 0.95rem;
  transition: all 0.15s; text-align: left;
}
.context-menu-item:hover { background: var(--color-sidebar-hover); color: var(--color-accent); }
.context-menu-item svg { width: 18px; height: 18px; opacity: 0.8; }
.context-menu-item.danger:hover { background: var(--color-danger-bg); color: var(--color-danger); }
.context-menu-divider { height: 1px; background: var(--color-border); margin: 6px 0; }

/* Memory Suggestion Toast */
.memory-suggestion-toast {
  position: fixed; bottom: 100px; left: 50%; transform: translateX(-50%) translateY(20px);
  z-index: 400; background: var(--color-surface);
  border: 1px solid var(--color-accent); border-radius: 16px;
  padding: 14px 16px; display: flex; gap: 12px; align-items: center;
  box-shadow: var(--shadow-lg), 0 0 20px var(--color-accent-glow);
  max-width: 420px; width: calc(100% - 40px);
  opacity: 0; pointer-events: none;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.memory-suggestion-toast.active { opacity: 1; pointer-events: all; transform: translateX(-50%) translateY(0); }
.toast-icon { font-size: 1.4rem; flex-shrink: 0; }
.toast-content { flex: 1; min-width: 0; }
.toast-title { font-size: 0.82rem; font-weight: 600; color: var(--color-accent); margin-bottom: 3px; }
.toast-text { font-size: 0.82rem; color: var(--color-text-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.toast-actions { display: flex; gap: 6px; flex-shrink: 0; }
.toast-btn {
  padding: 6px 12px; border-radius: 8px; border: none;
  cursor: pointer; font-family: inherit; font-size: 0.8rem; font-weight: 500;
  transition: all 0.15s;
}
.toast-btn-yes { background: var(--color-accent); color: white; }
.toast-btn-yes:hover { opacity: 0.85; }
.toast-btn-no { background: var(--color-surface-2); border: 1px solid var(--color-border); color: var(--color-text-2); }
.toast-btn-no:hover { border-color: var(--color-border); color: var(--color-text); }

/* General Toast */
.toast-notification {
  position: fixed; top: 20px; right: 20px; z-index: 500;
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: 12px; padding: 12px 18px;
  font-size: 0.88rem; box-shadow: var(--shadow-md);
  opacity: 0; pointer-events: none;
  transform: translateX(20px);
  transition: all 0.3s ease;
}
.toast-notification.active { opacity: 1; transform: translateX(0); }

/* Lock Overlay */
.lock-overlay {
  position: fixed; inset: 0; z-index: 600;
  background: var(--color-bg);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity 0.3s;
}
.lock-overlay.active { opacity: 1; pointer-events: all; }
.lock-content { text-align: center; display: flex; flex-direction: column; align-items: center; gap: 16px; }
.lock-icon { color: var(--color-text-3); }
.lock-content p { color: var(--color-text-2); font-size: 0.95rem; }
.lock-content .btn-primary { width: auto; padding: 12px 32px; }

/* Sidebar backdrop (mobile) */
.sidebar-backdrop {
  display: none; position: fixed; inset: 0; z-index: 90;
  background: rgba(0,0,0,0.5); backdrop-filter: blur(2px);
}

/* Empty state */
.empty-state {
  text-align: center; padding: 40px 20px; color: var(--color-text-3);
}
.empty-state p { font-size: 0.9rem; }

/* ── Context Menu on message ── */
.message-context-menu {
  position: fixed; z-index: 300;
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: 12px; padding: 6px;
  box-shadow: var(--shadow-md); min-width: 140px;
}

/* ── Responsive Mobile ── */
@media (max-width: 700px) {
  .sidebar {
    position: fixed; left: 0; top: 0; bottom: 0; z-index: 100;
    transform: translateX(-100%);
    box-shadow: var(--shadow-lg);
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-backdrop.active { display: block; }
  .sidebar-close { display: flex !important; }

  .message-wrapper { padding: 4px 12px; }
  .input-area { padding: 8px 12px 16px; }

  .auth-card, .setup-card { padding: 36px 24px; margin: 16px; }
  .modal-overlay { padding: 0; align-items: flex-end; }
  .modal { border-radius: 20px 20px 0 0; max-height: 92vh; }

  .welcome-state { padding: 20px; }
  .welcome-suggestions { flex-direction: column; align-items: center; }

  .memory-toolbar { flex-direction: column; align-items: flex-start; }
  .theme-options { flex-direction: column; }
  
  /* モバイル用コンテキストメニュー：中央配置固定 (Style unified above) */
}

@media (min-width: 701px) {
  .sidebar-close { display: none; }
}

/* ── Utility ── */
.hidden { display: none !important; }
.active { /* used for show state */ }

/* ── Light mode hljs override ── */
[data-theme="light"] .hljs {
  background: #f6f8fa; color: #24292e;
}

/* Star decoration in dark mode background */
[data-theme="dark"] .messages-area {
  background-image:
    radial-gradient(1px 1px at 15% 10%, rgba(255,255,255,0.08) 0%, transparent 0%),
    radial-gradient(1px 1px at 80% 25%, rgba(255,255,255,0.05) 0%, transparent 0%),
    radial-gradient(1px 1px at 45% 60%, rgba(255,255,255,0.06) 0%, transparent 0%),
    radial-gradient(1px 1px at 90% 70%, rgba(255,255,255,0.04) 0%, transparent 0%);
}

/* Smooth transitions for theme switch */
*, *::before, *::after {
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
}
/* But don't transition animations/transforms */
.auth-logo, .logo-svg, .typing-dot, .streaming-cursor, .pin-dot {
  transition: none;
}

/* ══════════════════════════════════════════
   Calendar Module Styles
   ══════════════════════════════════════════ */

/* Calendar Modal */
.modal-calendar-content {
  max-width: 900px; width: 95%; height: 85vh;
  display: flex; flex-direction: column; overflow: hidden;
}

.cal-layout {
  display: flex; flex: 1; overflow: hidden; gap: 20px;
}

/* Calendar Sidebar (grid) */
.cal-sidebar {
  width: 280px; min-width: 260px;
  border-right: 1px solid var(--color-border);
  padding-right: 16px; overflow-y: auto;
  display: flex; flex-direction: column; gap: 8px;
}

.cal-nav {
  display: flex; justify-content: space-between; align-items: center;
  padding: 4px 0; margin-bottom: 4px;
}

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

.cal-day-label {
  text-align: center; font-size: 0.72rem;
  color: var(--color-text-3); padding: 4px 0;
  font-weight: 600;
}
.cal-day-label.sun { color: var(--color-danger); }
.cal-day-label.sat { color: var(--color-accent); }

.cal-day {
  min-height: 52px;
  display: flex; flex-direction: column; align-items: center;
  justify-content: flex-start; padding: 4px 2px 3px;
  border-radius: 8px; cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease; position: relative;
  gap: 2px;
}
.cal-day:hover { background: var(--color-sidebar-hover); }
.cal-day.today { border-color: var(--color-accent); }
.cal-day.selected { background: var(--color-accent-dark); border-color: var(--color-accent); }
.cal-day.other-month { opacity: 0.3; pointer-events: none; font-size: 0.8rem; }

.cal-day-num {
  font-size: 0.82rem; font-weight: 500; line-height: 1;
  color: var(--color-text);
}
.cal-day.today .cal-day-num { color: var(--color-accent); font-weight: 700; }
.cal-day.selected .cal-day-num { color: var(--color-accent); }

.cal-emojis {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 1px;
  max-width: 100%;
}
.cal-emoji {
  font-size: 0.78rem; line-height: 1;
}

/* Day View */
.cal-day-view {
  flex: 1; overflow-y: auto; padding-left: 4px;
}

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

.cal-day-title {
  font-size: 1rem; font-weight: 600;
}

.cal-events-list {
  display: flex; flex-direction: column; gap: 10px;
}

.cal-empty-state {
  text-align: center; color: var(--color-text-3);
  font-size: 0.9rem; padding: 30px 0;
}

.cal-event-card {
  display: flex; align-items: flex-start; gap: 12px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: 12px; padding: 14px 16px;
  transition: border-color 0.2s;
  position: relative;
}
.cal-event-card:hover { border-color: var(--color-accent); }

.cal-event-emoji {
  font-size: 1.6rem; flex-shrink: 0; line-height: 1;
  margin-top: 2px;
}

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

.cal-event-title {
  font-weight: 600; font-size: 0.95rem;
  color: var(--color-text); display: flex; align-items: center; gap: 6px;
  margin-bottom: 3px;
}

.cal-event-time {
  font-size: 0.82rem; color: var(--color-accent);
  font-weight: 500;
}

.cal-event-span {
  font-size: 0.78rem; color: var(--color-text-3);
  display: block; margin-top: 2px;
}

.cal-event-desc {
  font-size: 0.83rem; color: var(--color-text-2);
  margin-top: 4px; line-height: 1.5;
  white-space: pre-wrap;
}

.cal-event-badge {
  font-size: 0.65rem; padding: 1px 6px;
  background: var(--color-accent-dark); color: var(--color-accent);
  border-radius: 10px; font-weight: 600;
}

.cal-event-actions {
  display: flex; gap: 4px; flex-shrink: 0;
  opacity: 0; transition: opacity 0.15s;
}
.cal-event-card:hover .cal-event-actions { opacity: 1; }

.cal-action-btn {
  background: none; border: 1px solid var(--color-border);
  border-radius: 6px; padding: 4px 8px;
  cursor: pointer; font-size: 0.85rem;
  transition: all 0.15s;
  color: var(--color-text-2);
}
.cal-action-btn:hover { background: var(--color-accent-dark); border-color: var(--color-accent); }
.cal-action-btn.danger:hover { background: var(--color-danger-bg); border-color: var(--color-danger); }

/* Event Add/Edit Modal */
.event-modal-content {
  max-width: 520px; width: 95%;
  max-height: 90vh; display: flex; flex-direction: column;
}

.event-form {
  overflow-y: auto;
  display: flex; flex-direction: column; gap: 0;
}

.event-emoji-header {
  display: flex; align-items: center; gap: 12px; margin-bottom: 10px;
}
.event-emoji-preview {
  font-size: 2rem; width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-surface-2); border: 2px solid var(--color-border);
  border-radius: 12px;
}
.event-emoji-text {
  width: 70px !important; font-size: 1.2rem !important;
  padding: 8px !important; text-align: center; cursor: default;
}

/* Emoji Picker */
.emoji-picker-grid {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: 12px; padding: 10px;
  max-height: 200px; overflow-y: auto;
}
.emoji-cat-label {
  font-size: 0.7rem; color: var(--color-text-3); font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.05em;
  margin: 6px 0 4px; padding: 0 2px;
}
.emoji-cat-label:first-child { margin-top: 0; }
.emoji-cat-row {
  display: flex; flex-wrap: wrap; gap: 2px; margin-bottom: 4px;
}
.emoji-btn {
  background: none; border: 1px solid transparent;
  border-radius: 6px; padding: 4px; font-size: 1.1rem;
  cursor: pointer; transition: all 0.12s ease;
  line-height: 1;
}
.emoji-btn:hover { background: var(--color-sidebar-hover); border-color: var(--color-border); transform: scale(1.15); }
.emoji-btn.selected { background: var(--color-accent-dark); border-color: var(--color-accent); }

.event-date-row {
  display: flex; gap: 8px; align-items: flex-start;
}

/* Watch emoji preview sync */
#event-emoji-input:not([value=""]) ~ .event-emoji-preview { display: none; }

/* Mobile responsive */
@media (max-width: 700px) {
  .cal-layout { flex-direction: column; gap: 12px; }
  .cal-sidebar {
    width: 100%; min-width: unset; border-right: none;
    border-bottom: 1px solid var(--color-border);
    padding-right: 0; padding-bottom: 12px;
  }
  .cal-day-view { padding-left: 0; }
  .modal-calendar-content { height: 92vh; }
  .cal-day { min-height: 44px; }
  .event-date-row { flex-direction: column; gap: 4px; }
  .event-date-row > div[style*="padding-top"] { display: none; }
}

/* ══════════════════════════════════════════
   Color Theme Overrides
   data-color-theme="default" / "mauve" / "sage" / "amber"
   ══════════════════════════════════════════ */

/* ── Default Theme ── */
[data-color-theme="default"][data-theme="light"] {
  --color-accent:      #7c6fcd;
  --color-accent-2:    #a89de0;
  --color-accent-glow: rgba(124, 111, 205, 0.15);
  --color-accent-dark: rgba(124, 111, 205, 0.08);
  --color-moon:        #c0b8f8;
  --color-moon-glow:   rgba(192, 184, 248, 0.15);
  --color-bg:          #f9f8fe;
  --color-bg-2:        #f2f0fb;
  --color-surface:     #ffffff;
  --color-surface-2:   #f6f4fd;
  --color-sidebar:     #f2f0fb;
  --color-border:      #c8c0f0;
  --color-border-light: #e4e0f8;
  --color-user-bubble: #ece8fc;
  --color-user-border: #c4b8f0;
  --color-ai-border:   #c8c0f0;
}
[data-color-theme="default"][data-theme="dark"] {
  --color-accent:      #9d93e0;
  --color-accent-2:    #b8b0ed;
  --color-accent-glow: rgba(157, 147, 224, 0.25);
  --color-accent-dark: rgba(157, 147, 224, 0.1);
  --color-moon:        #d0caff;
  --color-moon-glow:   rgba(208, 202, 255, 0.2);
  --color-bg:          #07081c;
  --color-bg-2:        #0d0e28;
  --color-surface:     #11122a;
  --color-surface-2:   #181938;
  --color-sidebar:     #0a0b20;
  --color-border:      #3d3568;
  --color-border-light: #2a2450;
  --color-user-bubble: #1a1740;
  --color-user-border: #3d3580;
  --color-ai-border:   #3d3568;
}

/* ── Mauve Theme ── */
[data-color-theme="mauve"][data-theme="light"] {
  --color-accent:      #9b7b9e;
  --color-accent-2:    #b89ebb;
  --color-accent-glow: rgba(155, 123, 158, 0.15);
  --color-accent-dark: rgba(155, 123, 158, 0.08);
  --color-moon:        #c8a8cc;
  --color-moon-glow:   rgba(200, 168, 204, 0.15);
  --color-bg:          #fdf8fe;
  --color-bg-2:        #f7f0f9;
  --color-surface:     #ffffff;
  --color-surface-2:   #faf3fb;
  --color-sidebar:     #f7f0f9;
  --color-border:      #d4b8d7;
  --color-border-light: #ecdcee;
  --color-user-bubble: #f5edf7;
  --color-user-border: #d4a8d8;
  --color-ai-border:   #d4b8d7;
}
[data-color-theme="mauve"][data-theme="dark"] {
  --color-accent:      #c09ac3;
  --color-accent-2:    #d4b8d7;
  --color-accent-glow: rgba(192, 154, 195, 0.25);
  --color-accent-dark: rgba(192, 154, 195, 0.1);
  --color-moon:        #dcc0e0;
  --color-moon-glow:   rgba(220, 192, 224, 0.2);
  --color-bg:          #0d080f;
  --color-bg-2:        #16101a;
  --color-surface:     #1c1220;
  --color-surface-2:   #24192a;
  --color-sidebar:     #110e18;
  --color-border:      #4a2e4d;
  --color-border-light: #3a2240;
  --color-user-bubble: #2a1830;
  --color-user-border: #6a3d70;
  --color-ai-border:   #4a2e4d;
}

/* ── Sage Theme ── */
[data-color-theme="sage"][data-theme="light"] {
  --color-accent:      #7a9b82;
  --color-accent-2:    #9bb5a2;
  --color-accent-glow: rgba(122, 155, 130, 0.15);
  --color-accent-dark: rgba(122, 155, 130, 0.08);
  --color-moon:        #a8c8b0;
  --color-moon-glow:   rgba(168, 200, 176, 0.15);
  --color-bg:          #f6fbf7;
  --color-bg-2:        #edf5ef;
  --color-surface:     #ffffff;
  --color-surface-2:   #f2f8f4;
  --color-sidebar:     #edf5ef;
  --color-border:      #b0c8b8;
  --color-border-light: #d8eadc;
  --color-user-bubble: #e8f3ea;
  --color-user-border: #a8c8b0;
  --color-ai-border:   #b0c8b8;
}
[data-color-theme="sage"][data-theme="dark"] {
  --color-accent:      #92b89a;
  --color-accent-2:    #aecfb6;
  --color-accent-glow: rgba(146, 184, 154, 0.25);
  --color-accent-dark: rgba(146, 184, 154, 0.1);
  --color-moon:        #b8d8be;
  --color-moon-glow:   rgba(184, 216, 190, 0.2);
  --color-bg:          #07100a;
  --color-bg-2:        #0d1812;
  --color-surface:     #111e16;
  --color-surface-2:   #18261c;
  --color-sidebar:     #0b140e;
  --color-border:      #2a4230;
  --color-border-light: #1e3824;
  --color-user-bubble: #122018;
  --color-user-border: #3a6844;
  --color-ai-border:   #2a4230;
}

/* ── Amber Theme ── */
[data-color-theme="amber"][data-theme="light"] {
  --color-accent:      #b08060;
  --color-accent-2:    #c49e82;
  --color-accent-glow: rgba(176, 128, 96, 0.15);
  --color-accent-dark: rgba(176, 128, 96, 0.08);
  --color-moon:        #c8a07a;
  --color-moon-glow:   rgba(200, 160, 122, 0.15);
  --color-bg:          #fdfaf5;
  --color-bg-2:        #f8f2e8;
  --color-surface:     #ffffff;
  --color-surface-2:   #fcf6ec;
  --color-sidebar:     #f8f2e8;
  --color-border:      #d4b89a;
  --color-border-light: #eeddd0;
  --color-user-bubble: #f8f0e4;
  --color-user-border: #d4a878;
  --color-ai-border:   #d4b89a;
}
[data-color-theme="amber"][data-theme="dark"] {
  --color-accent:      #cc9c78;
  --color-accent-2:    #ddb898;
  --color-accent-glow: rgba(204, 156, 120, 0.25);
  --color-accent-dark: rgba(204, 156, 120, 0.1);
  --color-moon:        #ddb888;
  --color-moon-glow:   rgba(221, 184, 136, 0.2);
  --color-bg:          #110e07;
  --color-bg-2:        #1a1508;
  --color-surface:     #1e1c10;
  --color-surface-2:   #262214;
  --color-sidebar:     #160e06;
  --color-border:      #4a3020;
  --color-border-light: #3a2410;
  --color-user-bubble: #2a1c0e;
  --color-user-border: #6a4228;
  --color-ai-border:   #4a3020;
}