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

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

:root {
  --primary: #1a73e8;
  --primary-dark: #1557b0;
  --primary-light: #e8f0fe;
  --surface: #ffffff;
  --warning-stroke: #92400e; /* amber-900 — dark stroke on yellow fill */
  --surface-variant: #f8f9fa;
  --background: #f1f3f4;
  --border: #e0e0e0;
  --text-primary: #202124;
  --text-secondary: #5f6368;
  --text-tertiary: #9aa0a6;
  --error: #d93025;
  --success: #188038;
  --warning: #e37400;
  --bubble-out: #1a73e8;
  --bubble-in: #f1f3f4;
  --radius: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.15);
  --shadow-lg: 0 4px 20px rgba(0,0,0,0.18);
  --transition: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Google Sans', 'Roboto', sans-serif;
  --font-scale: 1;
}

html, body, #root { height: 100%; min-width: 320px; font-family: var(--font); color: var(--text-primary); background: var(--background); }

/* Disable pull-to-refresh in PWA standalone mode — prevents viewport shift bug */
html {
  overscroll-behavior-y: none;
  font-size: 100%; /* inherits system font size — allows Android accessibility font scaling */
}

button { font-family: var(--font); cursor: pointer; border: none; background: none; }
input, textarea { font-family: var(--font); }
a { color: inherit; text-decoration: none; }

/* Scrollbars */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }

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

/* Utils */
.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 4px; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.w-full { width: 100%; }
.h-full { height: 100%; }
.relative { position: relative; }
.absolute { position: absolute; }
.overflow-hidden { overflow: hidden; }
.overflow-y-auto { overflow-y: auto; }
.flex-1 { flex: 1; min-width: 0; }
.shrink-0 { flex-shrink: 0; }
.text-sm { font-size: 13px; }
.text-xs { font-size: 11px; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.opacity-60 { opacity: 0.6; }
.pointer { cursor: pointer; }
.rounded { border-radius: var(--radius); }
.rounded-full { border-radius: 9999px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 20px; border-radius: 20px; font-size: 14px; font-weight: 500;
  transition: var(--transition); white-space: nowrap;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); box-shadow: var(--shadow-sm); }
.btn-secondary { background: transparent; color: var(--primary); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--primary-light); }
.btn-ghost { background: transparent; color: var(--text-secondary); }
.btn-ghost:hover { background: var(--background); color: var(--text-primary); }
.btn-danger { background: var(--error); color: white; }
.btn-danger:hover { opacity: 0.9; }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-icon { padding: 8px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; }
.btn-icon:hover { background: var(--background); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Inputs */
.input {
  width: 100%; padding: 10px 14px; border: 1px solid var(--border);
  border-radius: var(--radius); font-size: 14px; background: white;
  transition: border-color var(--transition);
  color: var(--text-primary);
}
.input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,115,232,0.15); }
.input::placeholder { color: var(--text-tertiary); }

/* Card */
.card {
  background: white; border-radius: var(--radius-lg); padding: 20px;
  box-shadow: var(--shadow-sm); border: 1px solid var(--border);
}

/* Modal overlay */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.4);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000; padding: 16px;
  animation: fadeIn 150ms ease;
}
.modal {
  background: white; border-radius: var(--radius-xl); padding: 24px;
  width: 100%; max-width: 480px; box-shadow: var(--shadow-lg);
  animation: slideUp 200ms cubic-bezier(0.4, 0, 0.2, 1);
  max-height: 90vh; overflow-y: auto;
}
.modal-title { font-size: 20px; font-weight: 600; margin-bottom: 20px; }

/* Avatar */
.avatar {
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-weight: 600; font-size: 14px; flex-shrink: 0; overflow: hidden;
  background: var(--primary); color: white; user-select: none;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.avatar-sm { width: 32px; height: 32px; font-size: 12px; }
.avatar-md { width: 40px; height: 40px; font-size: 15px; }
.avatar-lg { width: 48px; height: 48px; font-size: 18px; }
.avatar-xl { width: 72px; height: 72px; font-size: 24px; }

/* Badge */
.badge {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 20px; height: 20px; padding: 0 6px; border-radius: 10px;
  font-size: 11px; font-weight: 600; background: var(--primary); color: white;
}

/* Animations */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideIn { from { opacity: 0; transform: translateX(-10px); } to { opacity: 1; transform: translateX(0); } }
@keyframes spin { to { transform: rotate(360deg); } }

/* Loading */
.spinner {
  width: 24px; height: 24px; border: 3px solid var(--border);
  border-top-color: var(--primary); border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* Toast */
.toast-container { position: fixed; bottom: 20px; right: 20px; z-index: 9999; display: flex; flex-direction: column; gap: 8px; }
.toast {
  padding: 12px 20px; border-radius: var(--radius); background: #323232; color: white;
  font-size: 14px; box-shadow: var(--shadow-md); animation: slideIn 200ms ease;
  max-width: 320px;
}
.toast.error { background: var(--error); }
.toast.success { background: var(--success); }

/* Chip */
.chip {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 4px 10px; border-radius: 16px; font-size: 12px; font-weight: 500;
  background: var(--primary-light); color: var(--primary);
}
.chip-remove { cursor: pointer; opacity: 0.7; font-size: 14px; }
.chip-remove:hover { opacity: 1; }

/* Divider */
.divider { border: none; border-top: 1px solid var(--border); margin: 16px 0; }

/* Warning banner */
.warning-banner {
  background: #fff3e0; border: 1px solid #ff9800; border-radius: var(--radius);
  padding: 12px 16px; font-size: 13px; color: #e65100; display: flex; gap: 8px; align-items: flex-start;
}

/* Role badge */
.role-badge {
  font-size: 10px; font-weight: 600; padding: 2px 6px; border-radius: 4px; text-transform: uppercase;
}
.role-admin { background: #fce8e6; color: #c5221f; }
.role-member { background: var(--primary-light); color: var(--primary); }
.status-suspended { background: #fff3e0; color: #e65100; }

.settings-section-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 12px;
}

/* ── Dark mode ─────────────────────────────────────────── */
[data-theme="dark"] {
  --primary: #6ab0f5;
  --primary-dark: #4d9de0;
  --primary-light: #1a2d4a;
  --surface: #1e1e2e;
  --warning-stroke: #fde68a; /* amber-200 — light stroke on yellow fill in dark mode */
  --surface-variant: #252535;
  --background: #13131f;
  --border: #2e2e45;
  --text-primary: #e2e2f0;
  --text-secondary: #9898b8;
  --text-tertiary: #606080;
  --bubble-out: #4d8fd4;
  --bubble-in: #252535;
}
[data-theme="dark"] body,
[data-theme="dark"] html,
[data-theme="dark"] #root { background: var(--background); }
[data-theme="dark"] .modal { background: var(--surface); }
[data-theme="dark"] .footer-menu { background: var(--surface); }
[data-theme="dark"] .sidebar { background: var(--surface); }
[data-theme="dark"] .chat-window { background: var(--background); }
[data-theme="dark"] .chat-header { background: var(--surface); border-color: var(--border); }
[data-theme="dark"] .messages-container { background: var(--background); }
[data-theme="dark"] .input { background: var(--surface-variant); border-color: var(--border); color: var(--text-primary); }
[data-theme="dark"] .card { background: var(--surface); border-color: var(--border); }
[data-theme="dark"] .message-input-area { background: var(--surface); border-color: var(--border); }
[data-theme="dark"] .message-input-wrap { background: var(--surface-variant); border-color: var(--border); }
[data-theme="dark"] .msg-input:focus { background: var(--surface-variant); color: var(--text-primary); }
/* Light mode: focused input goes white so it pops from the grey background */
[data-theme="light"] .msg-input:focus, :root:not([data-theme="dark"]) .msg-input:focus { background: white; }
[data-theme="dark"] .btn-secondary { border-color: var(--border); color: var(--primary); }
[data-theme="dark"] .btn-secondary:hover { background: var(--primary-light); }
[data-theme="dark"] .search-input { background: var(--surface-variant); color: var(--text-primary); }
[data-theme="dark"] .group-item:hover { background: var(--surface-variant); }
[data-theme="dark"] .group-item.active { background: var(--primary-light); }
[data-theme="dark"] .user-footer-btn:hover { background: var(--surface-variant); }
[data-theme="dark"] .footer-menu-item:hover { background: var(--surface-variant); }
[data-theme="dark"] .footer-menu-item.danger:hover { background: #3a1a1a; }
[data-theme="dark"] .btn-icon { color: var(--text-primary); }
[data-theme="dark"] .btn-icon:hover { background: var(--surface-variant); }
[data-theme="dark"] .sidebar-header { background: var(--surface); border-color: var(--border); }
[data-theme="dark"] .newchat-btn { background: var(--surface-variant); border-color: var(--primary); color: var(--primary); }
[data-theme="dark"] .newchat-btn:hover { background: var(--primary); color: white; }
[data-theme="dark"] .newchat-fab { background: var(--primary); }
[data-theme="dark"] .msg-actions { background: var(--surface); border-color: var(--border); }
[data-theme="dark"] .reaction-btn:hover { background: var(--surface-variant); }
[data-theme="dark"] .emoji-picker-wrap { background: var(--surface); border-color: var(--border); }
[data-theme="dark"] .reply-preview { background: var(--surface-variant); border-color: var(--primary); }
[data-theme="dark"] .load-more-btn { background: var(--surface-variant); color: var(--text-secondary); }
[data-theme="dark"] .readonly-bar { background: var(--surface); border-color: var(--border); color: var(--text-secondary); }
[data-theme="dark"] .warning-banner { background: #2a1f00; border-color: #6a4a00; color: #ffb74d; }

/* ── About Modal ─────────────────────────────────────── */
.about-modal {
  max-width: 420px;
  text-align: center;
  position: relative;
  padding: 32px 28px 24px;
}
.about-close {
  position: absolute;
  top: 12px;
  right: 12px;
}
.about-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 28px;
}
.about-logo {
  width: 80px;
  height: 80px;
  object-fit: contain;
  margin-bottom: 12px;
}
.about-appname {
  font-size: 26px;
  font-weight: 800;
  color: var(--primary);
  margin: 0 0 4px;
}
.about-tagline {
  font-size: 13px;
  color: var(--text-tertiary);
  font-style: italic;
  margin: 0;
}
.about-table {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: visible;
  margin-bottom: 20px;
  text-align: left;
}
.about-row {
  display: flex;
  align-items: flex-start;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  gap: 12px;
}
.about-row:last-child { border-bottom: none; }
.about-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  min-width: 90px;
  flex-shrink: 0;
  padding-top: 1px;
}
.about-value {
  font-size: 14px;
  color: var(--text-primary);
  flex: 1;
  min-width: 0;
  overflow-wrap: break-word;
  word-break: normal;
  white-space: normal;
  line-height: 1.5;
}
.about-mono {
  font-family: monospace;
  font-size: 13px;
}
.about-link {
  color: var(--primary);
  text-decoration: underline;
}
.about-link:hover { opacity: 0.8; }
.about-footer {
  font-size: 12px;
  color: var(--text-tertiary);
  margin: 0;
}
[data-theme="dark"] .about-table { border-color: var(--border); }
[data-theme="dark"] .about-row { border-color: var(--border); }

[data-theme="dark"] .attach-menu {
  background: var(--surface);
  border-color: var(--border);
}
[data-theme="dark"] .attach-item {
  color: var(--text-primary);
}
[data-theme="dark"] .attach-item:hover {
  background: var(--primary-light);
  color: var(--primary);
}
[data-theme="dark"] .attach-item svg {
  color: var(--text-secondary);
}
[data-theme="dark"] .mention-dropdown {
  background: var(--surface);
  border-color: var(--border);
}
[data-theme="dark"] .mention-item {
  color: var(--text-primary);
}
[data-theme="dark"] .mention-item:hover,
[data-theme="dark"] .mention-item.active {
  background: var(--primary-light);
  color: var(--primary);
}
[data-theme="dark"] .mention-role {
  color: var(--text-tertiary);
}
[data-theme="dark"] .mention-avatar {
  background: var(--primary);
}


/* Night mode: .in bubble (dark surface) — base mention colour is too dark, use light primary */
[data-theme="dark"] .in .mention {
  color: #6ab0f5;
  background: rgba(106,176,245,0.15);
}

/* Night mode: .out bubble — white stays white, just ensure background tint works on darker primary */
[data-theme="dark"] .out .mention {
  color: #ffffff;
  background: rgba(255,255,255,0.25);
}

[data-theme="dark"] .reaction-btn {
  background: var(--surface-variant);
  border-color: var(--border);
}
[data-theme="dark"] .reaction-btn:hover {
  background: var(--primary-light);
}

/* ── Help Modal ─────────────────────────────────────────────── */
.help-modal {
  width: min(720px, 94vw);
  max-height: 85vh;
  display: flex;
  flex-direction: column;
}

.help-content {
  flex: 1;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  background: var(--surface-variant);
  margin-bottom: 16px;
}

.help-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 4px;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}

/* Markdown typography */
.help-markdown h1 { font-size: 1.5rem; font-weight: 700; margin: 0 0 16px; color: var(--text-primary); }
.help-markdown h2 { font-size: 1.15rem; font-weight: 700; margin: 24px 0 10px; color: var(--text-primary); border-bottom: 1px solid var(--border); padding-bottom: 4px; }
.help-markdown h3 { font-size: 1rem; font-weight: 600; margin: 16px 0 6px; color: var(--text-primary); }
.help-markdown p  { margin: 0 0 12px; line-height: 1.65; color: var(--text-secondary); font-size: 14px; }
.help-markdown ul, .help-markdown ol { margin: 0 0 12px 20px; color: var(--text-secondary); font-size: 14px; }
.help-markdown li { margin-bottom: 4px; line-height: 1.6; }
.help-markdown strong { font-weight: 600; color: var(--text-primary); }
.help-markdown em { font-style: italic; }
.help-markdown code { font-family: monospace; font-size: 13px; background: var(--background); padding: 1px 5px; border-radius: 4px; color: var(--primary); }
.help-markdown pre  { background: var(--background); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 16px; overflow-x: auto; margin: 0 0 12px; }
.help-markdown pre code { background: none; padding: 0; color: var(--text-primary); }
.help-markdown blockquote { border-left: 3px solid var(--primary); margin: 0 0 12px; padding: 6px 14px; background: var(--primary-light); border-radius: 0 var(--radius) var(--radius) 0; }
.help-markdown blockquote p { margin: 0; color: var(--text-secondary); }
.help-markdown hr { border: none; border-top: 1px solid var(--border); margin: 20px 0; }
.help-markdown a { color: var(--primary); text-decoration: underline; }

[data-theme="dark"] .help-markdown code { background: var(--surface); }
[data-theme="dark"] .help-markdown pre  { background: var(--surface); }
[data-theme="dark"] .help-markdown blockquote { background: rgba(99,102,241,0.1); }

/* Mention picker online dot */
.mention-avatar-wrap {
  position: relative;
  display: inline-flex;
  flex-shrink: 0;
}

.mention-online-dot {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 9px;
  height: 9px;
  background: #34a853;
  border-radius: 50%;
  border: 2px solid var(--surface);
  pointer-events: none;
}