/*
   style.css — Real Time Forum
   Visual redesign only — architecture, class names, and IDs are untouched.
   Design system: clean, minimal, premium dark UI (Linear / Vercel / Notion inspired).
*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@500;600&display=swap');

/* ============================================================
   RESET & BASE
   ============================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* surfaces */
  --bg-page: #0a0a0c;
  --bg-surface: #111114;
  --bg-card: #15151a;
  --bg-input: #0d0d10;
  --bg-hover: #1c1c22;

  /* borders */
  --border: #23232a;
  --border-hover: #34343f;

  /* accent (violet — Linear-esque) */
  --accent: #6e6bf0;
  --accent-hover: #5b58e0;
  --accent-soft: rgba(110, 107, 240, 0.12);

  /* text */
  --text-primary: #f4f4f6;
  --text-secondary: #a3a3ad;
  --text-muted: #6b6b75;
  --text-body: #d6d6df; /* post content — brighter than secondary for readability */

  /* status */
  --success: #3ecf8e;
  --success-soft: rgba(62, 207, 142, 0.1);
  --danger: #f0605f;
  --danger-soft: rgba(240, 96, 95, 0.1);

  /* radii */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-pill: 999px;

  /* shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px -8px rgba(0, 0, 0, 0.55);
  --shadow-lg: 0 20px 48px -12px rgba(0, 0, 0, 0.6);
  --shadow-focus: 0 0 0 3px var(--accent-soft);

  /* type */
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', 'SF Mono', ui-monospace, monospace;

  /* motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

html,
body {
  height: 100%;
  font-family: var(--sans);
  background: var(--bg-page);
  color: var(--text-primary);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  background-image: radial-gradient(
    circle at 50% 0%,
    rgba(110, 107, 240, 0.06),
    transparent 60%
  );
  background-repeat: no-repeat;
}

#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent);
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border-hover);
  border-radius: var(--radius-pill);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ---- Focus visibility (accessible) ---- */
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
button:focus-visible,
[onclick]:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  height: 64px;
  background: rgba(10, 10, 12, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-primary);
  cursor: pointer;
  letter-spacing: -0.01em;
  white-space: nowrap;
  flex-shrink: 0;
  transition: opacity 0.15s var(--ease);
}

.logo:hover {
  opacity: 0.85;
}

.logo::before {
  content: '';
  display: inline-block;
  width: 9px;
  height: 9px;
  border-radius: 3px;
  background: linear-gradient(135deg, var(--accent), #9d8cff);
  box-shadow: 0 0 12px rgba(110, 107, 240, 0.6);
}

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

.nav-username {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding-right: 4px;
  min-width: 0;
  max-width: 40vw;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ============================================================
   BUTTONS — base
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-primary);
  font-family: var(--sans);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: -0.005em;
  cursor: pointer;
  transition: background 0.15s var(--ease), border-color 0.15s var(--ease),
    color 0.15s var(--ease), transform 0.1s var(--ease),
    box-shadow 0.15s var(--ease);
}
.btn:hover {
  background: var(--bg-hover);
  border-color: var(--border-hover);
}
.btn:active {
  transform: scale(0.97);
}

/* Navbar variants */
.btn.login {
  border-color: var(--border);
  color: var(--text-secondary);
  background: transparent;
}
.btn.login:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: var(--bg-hover);
}

.btn.register {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.08) inset;
}
.btn.register:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  box-shadow: 0 4px 14px -4px rgba(110, 107, 240, 0.55);
}

.btn.logout {
  color: var(--text-secondary);
  border-color: var(--border);
  background: transparent;
}
.btn.logout:hover {
  color: var(--danger);
  border-color: var(--danger);
  background: var(--danger-soft);
}

/* Primary variant */
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.08) inset;
}
.btn.primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  box-shadow: 0 4px 14px -4px rgba(110, 107, 240, 0.55);
}

/* Cancel variant */
.btn.cancel {
  background: transparent;
  border-color: var(--border);
  color: var(--text-secondary);
}
.btn.cancel:hover {
  background: var(--bg-hover);
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.create-post-btn {
  margin-bottom: 1.25rem;
}

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  display: grid;
  grid-template-columns: minmax(240px, 280px) minmax(0, 1fr);
  gap: 1.75rem;
  max-width: 1680px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem clamp(1.5rem, 3vw, 3rem);
  flex: 1;
  align-items: start;
  transition: grid-template-columns 0.2s var(--ease);
}

.container.chat-open {
  grid-template-columns: minmax(240px, 280px) minmax(0, 1fr);
}

/* ============================================================
   SIDEBAR (filters)
   ============================================================ */
.sidebar-col {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  position: sticky;
  top: 88px;
  align-self: start;
  min-width: 0;
}

.sidebar {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.sidebar h3 {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 1.1rem;
}

.filter-group h4 {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 0.65rem;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 1.25rem;
}

.filter-group label {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 0.87rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 7px 8px;
  border-radius: var(--radius-sm);
  transition: background 0.12s var(--ease), color 0.12s var(--ease);
}
.filter-group label:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

.filter-group input[type='checkbox'] {
  width: 15px;
  height: 15px;
  accent-color: var(--accent);
  cursor: pointer;
  flex-shrink: 0;
}

.clear-btn {
  display: block;
  width: 100%;
  margin-top: 0.4rem;
  padding: 9px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: var(--sans);
  font-size: 0.76rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s var(--ease), color 0.15s var(--ease),
    background 0.15s var(--ease);
}
.clear-btn:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: var(--bg-hover);
}

/* ============================================================
   CONTENT AREA
   ============================================================ */
.content {
  min-width: 0;
}

/* ============================================================
   POSTS FEED
   ============================================================ */
.posts-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.post {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.6rem;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.18s var(--ease), transform 0.18s var(--ease),
    box-shadow 0.18s var(--ease);
  animation: post-in 0.35s var(--ease);
}
.post:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

@keyframes post-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Post header — author byline + title (postCardHTML) */
.post-header {
  margin-bottom: 0.95rem;
}

/* Author byline */
.post-author {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

/* Post title */
.post-title {
  font-size: 1.18rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  line-height: 1.35;
  overflow-wrap: break-word;
}

/* Post body — inset panel that clearly separates content from the title */
.post-body {
  margin-top: 0.9rem;
  padding: 0.95rem 1.05rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: border-color 0.18s var(--ease);
}
.post:hover .post-body {
  border-color: var(--border-hover);
}
.post-body p {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--text-body);
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
}

.post-categories {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 0.75rem;
  margin-bottom: 0.4rem;
}

/* Category pill — used directly in utils.js postCardHTML() */
.category-tag,
.category {
  display: inline-block;
  padding: 0.3rem 0.7rem;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid rgba(110, 107, 240, 0.28);
  border-radius: var(--radius-pill);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.4rem;
}

/* ============================================================
   POST REACTIONS
   ============================================================ */
.post-reactions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.9rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--border);
}

.react-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 0.4rem 0.85rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  color: var(--text-secondary);
  font-family: var(--sans);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s var(--ease), border-color 0.15s var(--ease),
    color 0.15s var(--ease), transform 0.1s var(--ease);
}

.react-btn:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: var(--bg-hover);
}

.react-btn:active {
  transform: scale(0.94);
}

.react-btn .like-count,
.react-btn .dislike-count {
  font-family: var(--mono);
  font-weight: 600;
  color: inherit;
}

.comment-link-btn {
  padding: 0.4rem 0.55rem;
  min-width: 36px;
  font-size: 0.9rem;
  line-height: 1;
}

/* active (user's current reaction) */
.react-btn.like-btn.active {
  border-color: var(--success);
  color: var(--success);
  background: var(--success-soft);
}
.react-btn.like-btn.active:hover {
  border-color: var(--success);
  color: var(--success);
}

.react-btn.dislike-btn.active {
  border-color: var(--danger);
  color: var(--danger);
  background: var(--danger-soft);
}
.react-btn.dislike-btn.active:hover {
  border-color: var(--danger);
  color: var(--danger);
}

.empty-feed,
.error-text {
  color: var(--text-muted);
  font-size: 0.88rem;
  font-weight: 500;
  padding: 3.5rem 2rem;
  text-align: center;
  background: var(--bg-surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
}

/* ============================================================
   SINGLE POST PAGE + COMMENTS
   ============================================================ */
#post-back-wrap {
  padding-top: 1.1rem;
}

.post-back-btn {
  background: var(--success-soft);
  border-color: var(--success);
  color: var(--success);
}

.post-back-btn:hover {
  background: rgba(62, 207, 142, 0.2);
  border-color: var(--success);
  color: #8cf2c2;
}

#post-container {
  padding-top: 1.4rem;
}

#comments-container {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 0.6rem;
}

.comment {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.9rem 1rem;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.15s var(--ease), background 0.15s var(--ease);
}

.comment:hover {
  border-color: var(--border-hover);
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.01),
    rgba(255, 255, 255, 0)
  );
}

.comment p:first-child {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.comment p:first-child strong {
  color: var(--text-primary);
  font-weight: 700;
}

.comment p:last-child {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-word;
}

.comment-reactions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.6rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

.react-btn-sm {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 0.25rem 0.6rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  color: var(--text-secondary);
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s var(--ease), border-color 0.15s var(--ease),
    color 0.15s var(--ease), transform 0.1s var(--ease);
}

.react-btn-sm:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: var(--bg-hover);
}

.react-btn-sm:active {
  transform: scale(0.94);
}

.react-btn-sm .like-count,
.react-btn-sm .dislike-count {
  font-family: var(--mono);
  font-weight: 600;
  color: inherit;
}

.react-btn-sm.like-btn.active {
  border-color: var(--success);
  color: var(--success);
  background: var(--success-soft);
}
.react-btn-sm.like-btn.active:hover {
  border-color: var(--success);
  color: var(--success);
}

.react-btn-sm.dislike-btn.active {
  border-color: var(--danger);
  color: var(--danger);
  background: var(--danger-soft);
}
.react-btn-sm.dislike-btn.active:hover {
  border-color: var(--danger);
  color: var(--danger);
}

.no-comments {
  text-align: center;
  padding: 1.3rem 1rem;
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: 0.85rem;
  background: var(--bg-surface);
}

#comment-form-container {
  margin-top: 0.9rem;
  margin-bottom: 0.2rem;
  padding: 1rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-surface);
}

#comment-input {
  width: 100%;
  min-height: 110px;
  resize: vertical;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-input);
  color: var(--text-primary);
  padding: 0.75rem 0.9rem;
  font-family: var(--sans);
  font-size: 0.9rem;
  line-height: 1.55;
  transition: border-color 0.15s var(--ease), box-shadow 0.15s var(--ease);
}

#comment-input::placeholder {
  color: var(--text-muted);
}

#comment-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: var(--shadow-focus);
}

#comment-form-container .btn {
  margin-top: 0.75rem;
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

#comment-form-container .btn:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

#comments-load-more-wrap.load-more-wrap {
  margin-top: 1rem;
  margin-bottom: 2rem;
}

/* ============================================================
   CREATE POST FORM
   ============================================================ */
.create-post-form {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-sm);
  animation: post-in 0.3s var(--ease);
}

.create-post-form h3 {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.1rem;
  color: var(--text-muted);
}

.create-post-form input,
.create-post-form select,
.create-post-form textarea {
  display: block;
  width: 100%;
  margin-bottom: 0.85rem;
  padding: 11px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--sans);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.15s var(--ease), box-shadow 0.15s var(--ease);
}
.create-post-form input::placeholder,
.create-post-form textarea::placeholder {
  color: var(--text-muted);
}
.create-post-form input:focus,
.create-post-form select:focus,
.create-post-form textarea:focus {
  border-color: var(--accent);
  box-shadow: var(--shadow-focus);
}
.create-post-form select option {
  background: var(--bg-input);
}
.create-post-form textarea {
  resize: vertical;
  min-height: 130px;
  line-height: 1.6;
}

/* Category Checkbox Grid */
#post-category {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 1.25rem;
  align-items: center;
}

#post-category a {
  flex-basis: 100%;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.2rem;
}

#post-category label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

#post-category label:hover {
  border-color: var(--accent);
}

.create-post-form #post-category input[type='checkbox'] {
  display: inline-block;
  width: auto;
  margin: 0;
  padding: 0;
  accent-color: var(--accent);
}

.form-actions {
  display: flex;
  gap: 10px;
  margin-top: 0.25rem;
}

/* ============================================================
   AUTH PAGES
   ============================================================ */
.auth-shell {
  width: 100%;
  max-width: 420px;
  margin: clamp(1.5rem, 12vh, 6rem) auto 0;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2.25rem;
  box-shadow: var(--shadow-lg);
  animation: post-in 0.35s var(--ease);
}

.auth-shell h2 {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

/* inputs */
.auth-shell input,
.auth-shell select {
  display: block;
  width: 100%;
  margin-bottom: 0.85rem;
  padding: 11px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--sans);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.15s var(--ease), box-shadow 0.15s var(--ease);
}
.auth-shell input::placeholder {
  color: var(--text-muted);
}
.auth-shell input:focus,
.auth-shell select:focus {
  border-color: var(--accent);
  box-shadow: var(--shadow-focus);
}
.auth-shell select option {
  background: var(--bg-surface);
  color: var(--text-primary);
}

/* submit button */
.auth-shell button[type='button'] {
  display: block;
  width: 100%;
  margin-top: 0.6rem;
  padding: 12px 18px;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  color: #ffffff;
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s var(--ease), transform 0.1s var(--ease),
    box-shadow 0.15s var(--ease);
  text-align: center;
}
.auth-shell button[type='button']:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  box-shadow: 0 4px 14px -4px rgba(110, 107, 240, 0.55);
}
.auth-shell button[type='button']:active {
  transform: scale(0.98);
}

.auth-switch {
  margin-top: 1.25rem;
  text-align: center;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  cursor: pointer;
}
.auth-switch:hover {
  text-decoration: underline;
}

/* Demo quick-login buttons */
.demo-divider {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  margin: 1.4rem 0 1rem;
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.demo-divider::before,
.demo-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.demo-users {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 0.6rem;
}

.auth-shell button.demo-user {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  width: 100%;
  margin-top: 0;
  padding: 0.55rem 0.7rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  text-align: left;
  box-shadow: none;
}
.auth-shell button.demo-user:hover {
  background: var(--bg-hover);
  border-color: var(--accent);
  box-shadow: var(--shadow-focus);
  transform: translateY(-1px);
}
.auth-shell button.demo-user:active {
  transform: scale(0.97);
}

.demo-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--avatar-a), var(--avatar-b));
  font-size: 0.72rem;
  font-weight: 800;
  color: #ffffff;
  flex-shrink: 0;
}

.demo-meta {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.demo-meta strong {
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1.2;
}
.demo-meta small {
  font-size: 0.68rem;
  color: var(--text-muted);
}

/* ============================================================
   INLINE FORM MESSAGES (legacy support, unused by current JS)
   ============================================================ */
#form-message {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 1rem;
}
.is-error {
  background: var(--danger-soft);
  color: var(--danger);
  border: 1px solid rgba(240, 96, 95, 0.35);
}
.is-success {
  background: var(--success-soft);
  color: var(--success);
  border: 1px solid rgba(62, 207, 142, 0.35);
}

/* ============================================================
   ERROR PAGE
   ============================================================ */
.error-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: 5rem 2rem;
  text-align: center;
}

.error-code {
  font-family: var(--mono);
  font-size: 6rem;
  font-weight: 700;
  line-height: 1;
  background: linear-gradient(135deg, var(--accent), #b6acff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 1.1rem;
  letter-spacing: -3px;
}

.error-title {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.error-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  max-width: 380px;
  line-height: 1.7;
  margin-bottom: 2rem;
}

.error-page .btn {
  padding: 11px 32px;
  font-size: 0.82rem;
}

/* ============================================================
   TOAST NOTIFICATION
   ============================================================ */
.toast {
  position: fixed;
  top: 5.5rem;
  right: 1.5rem;
  z-index: 9999;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 18px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(-10px) scale(0.98);
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
  pointer-events: none;
  max-width: 340px;
  backdrop-filter: blur(10px);
}
.toast.toast-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}
.toast.toast-success {
  background: rgba(20, 30, 26, 0.92);
  border: 1px solid var(--success);
  color: var(--success);
}
.toast.toast-error {
  background: rgba(32, 20, 20, 0.92);
  border: 1px solid var(--danger);
  color: var(--danger);
}
.toast-text {
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1.45;
}

/* ============================================================
   LOAD MORE
   ============================================================ */
.load-more-wrap {
  display: flex;
  justify-content: center;
  margin-top: 1.5rem;
}
.load-more-btn {
  padding: 10px 28px;
  font-size: 0.8rem;
  border-color: var(--border);
  color: var(--text-secondary);
  border-radius: var(--radius-pill);
}
.load-more-btn:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
}
.load-more-count {
  color: var(--text-muted);
  font-weight: 500;
}

/* ============================================================
   CHAT SIDEBAR (users)
   ============================================================ */
.chat-sidebar {
  display: flex;
  flex-direction: column;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  min-height: 0;
}

/* ---- Header ---- */
.chat-sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 0.85rem;
  margin-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.chat-sidebar-title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.chat-online-count {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--success);
  letter-spacing: 0.02em;
}

/* ---- User list ---- */
.chat-user-list {
  max-height: 46vh;
  overflow-y: auto;
  padding: 0.15rem;
  margin: 0 -0.15rem;
  scrollbar-gutter: stable;
  overscroll-behavior: contain;
}

.chat-empty-list {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
  padding: 2.5rem 1rem;
}

.chat-user-item {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.6rem 0.7rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.12s var(--ease);
  border-left: 2px solid transparent;
}

.chat-user-item:hover {
  background: var(--bg-hover);
}
.chat-user-item.active {
  background: var(--bg-hover);
  border-left-color: var(--accent);
}
.chat-user-item.offline {
  opacity: 0.45;
}

/* ---- Avatar ---- */
.chat-avatar {
  position: relative;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-soft), transparent);
  border: 1px solid var(--border-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-primary);
  flex-shrink: 0;
}

.chat-avatar.sm {
  width: 26px;
  height: 26px;
  font-size: 0.65rem;
}

.chat-dot {
  position: absolute;
  bottom: -1px;
  right: -1px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--bg-surface);
}

.dot-on {
  background-color: var(--success);
}

.dot-off {
  background-color: var(--text-muted);
}

/* ---- User info (legacy support, unused by current JS) ---- */
.chat-user-info {
  flex: 1;
  min-width: 0;
}

.chat-user-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.1rem;
  gap: 0.4rem;
}

.chat-username {
  flex: 1;
  min-width: 0;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-last-time {
  flex-shrink: 0;
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--text-muted);
}

.chat-badge {
  background: var(--accent);
  color: #ffffff;
  font-family: var(--mono);
  font-size: 0.6rem;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: var(--radius-pill);
  flex-shrink: 0;
  margin-left: 4px;
}

.chat-preview {
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-no-msg {
  font-style: italic;
  color: var(--text-muted);
  font-size: 0.74rem;
}

/* ---- Chat dock (right column) ---- */
.chat-panel-dock {
  display: none;
}

.chat-panel-dock.open {
  display: flex;
  flex-direction: column;
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: min(400px, calc(100% - 40px)); /* Responsive width */
  height: 420px; /* Height for approximately 7 visible messages */
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  animation: post-in 0.25s var(--ease);
  z-index: 9999; /* Higher z-index to make it independent from other elements */
}

/* ---- Chat panel (fills the dock) ---- */
.chat-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.chat-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.9rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.chat-panel-user {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.chat-panel-name {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-primary);
}

.chat-panel-status {
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.st-on {
  color: var(--success);
}
.st-off {
  color: var(--text-muted);
}

.chat-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.85rem;
  cursor: pointer;
  padding: 3px 6px;
  border-radius: var(--radius-sm);
  transition: color 0.15s var(--ease), background 0.15s var(--ease);
  line-height: 1;
  /* Ensure the close button is always visible and accessible */
  position: relative;
  z-index: 2;
}
.chat-close:hover {
  color: var(--danger);
  background: var(--danger-soft);
}

/* ---- Messages ---- */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 0.65rem 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  overscroll-behavior: contain;
}

.chat-msg-meta {
  display: inline-flex;
  align-items: baseline;
  gap: 0.35rem;
}

.chat-sender {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--text-secondary);
}

.chat-no-history {
  text-align: center;
  font-size: 0.7rem;
  color: var(--text-muted);
  padding: 1rem 0;
}

.chat-msg {
  display: flex;
  flex-direction: column;
  max-width: 85%;
}

.chat-msg.mine {
  align-self: flex-end;
  align-items: flex-end;
}
.chat-msg.theirs {
  align-self: flex-start;
  align-items: flex-start;
}

.chat-bubble {
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-md);
  font-size: 0.84rem;
  line-height: 1.45;
  word-break: break-word;
}

.chat-msg.mine .chat-bubble {
  background: var(--accent);
  color: #ffffff;
  border-bottom-right-radius: 4px;
}
.chat-msg.theirs .chat-bubble {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-bottom-left-radius: 4px;
}

.chat-time {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--text-muted);
  margin-top: 3px;
}

/* ---- Typing indicator ---- */
.chat-typing-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0.9rem;
  height: 22px;          /* ‼️ Space always reserved so messages don't shift */
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);       /* animated dots pick this up */
  background: var(--accent-soft);
  border-radius: var(--radius-sm);
  opacity: 0;                 /* Hidden by default; only opacity toggles */
  flex-shrink: 0;
  transition: opacity 0.15s var(--ease);
  pointer-events: none;       /* Never blocks clicks, even when fading through */
}

.chat-typing-indicator.visible {
  opacity: 1;
}

/* "Sara is typing" label — bright so it reads at a glance */
.chat-typing-name {
  color: var(--text-primary);
  font-weight: 700;
}

.chat-typing-dots {
  display: inline-flex;
  gap: 4px;
}

.chat-typing-dots span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  animation: chat-typing-bounce 1.2s infinite ease-in-out;
  will-change: transform;
}

.chat-typing-dots span:nth-child(2) {
  animation-delay: 0.15s;
}
.chat-typing-dots span:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes chat-typing-bounce {
  0%,
  60%,
  100% {
    transform: translateY(0);
  }
  30% {
    transform: translateY(-4px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .chat-typing-dots span {
    animation: none;
  }
}

/* ---- Input ---- */
.chat-input-row {
  display: flex;
  gap: 0.5rem;
  padding: 0.7rem 0.9rem;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.chat-input-row.disabled {
  opacity: 0.5;
}

.chat-input {
  flex: 1;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 0.5rem 0.9rem;
  color: var(--text-primary);
  font-family: var(--sans);
  font-size: 0.84rem;
  outline: none;
  transition: border-color 0.15s var(--ease), box-shadow 0.15s var(--ease);
  min-width: 0;
}

.chat-input:focus {
  border-color: var(--accent);
  box-shadow: var(--shadow-focus);
}
.chat-input::placeholder {
  color: var(--text-muted);
}
.chat-input:disabled {
  cursor: not-allowed;
}

.chat-send {
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 50%;
  color: #ffffff;
  font-size: 0.9rem;
  font-weight: 700;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.15s var(--ease), transform 0.1s var(--ease);
  flex-shrink: 0;
}

.chat-send:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}
.chat-send:active {
  transform: scale(0.94);
}
.chat-send:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1180px) {
  .container,
  .container.chat-open {
    grid-template-columns: minmax(220px, 260px) minmax(0, 1fr);
    max-width: 1000px;
  }
}

@media (max-width: 768px) {
  .chat-panel-dock.open {
    width: calc(100% - 20px);
    height: min(460px, calc(100vh - 100px));
    right: 10px;
    left: 10px;
    bottom: 10px;
  }

  /* Single-column layout on small screens regardless of chat state.
     minmax(0, 1fr) is essential: a plain 1fr track cannot shrink below
     the widest content's min-content size, which widens the whole page
     and forces the browser to zoom out on phones. */
  .container {
    grid-template-columns: minmax(0, 1fr);
  }

  /* Keep the natural DOM order: chat sidebar + category filters render
     above the feed on mobile. */

  /* Prevent chat dock from interfering with main page content, and force
     single-column layout on small screens while chat is open */
  .container.chat-open {
    padding-bottom: 480px; /* Make space for chat dock */
    grid-template-columns: minmax(0, 1fr); /* Force single column layout */
  }

  #comment-form-container {
    padding: 0.85rem;
  }

  #comment-form-container .btn {
    width: 100%;
  }

  #comments-load-more-wrap.load-more-wrap {
    margin-bottom: 1.4rem;
  }

  .sidebar-col {
    position: static;
  }

  .sidebar {
    display: block;
  }

  /* Compact two-column category filters on mobile */
  .filter-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px;
  }
  .filter-group h4 {
    grid-column: 1 / -1;
  }
  .navbar {
    padding: 0 1.1rem;
  }

  .auth-shell {
    margin: 1.5rem auto;
    width: calc(100% - 2rem);
    padding: 1.75rem 1.5rem;
  }

  .error-code {
    font-size: 4.2rem;
  }

  .chat-user-list {
    max-height: 200px;
  }
}

@media (max-width: 420px) {
  .navbar {
    height: 58px;
    padding: 0 0.9rem;
  }
  .navbar .btn {
    padding: 0.42rem 0.85rem;
    font-size: 0.78rem;
  }
  .auth-buttons {
    gap: 6px;
  }
  .demo-users {
    grid-template-columns: minmax(0, 1fr);
  }
  .sidebar {
    padding: 1.25rem;
  }
  .post {
    padding: 1.15rem 1.1rem;
  }
  .post-title {
    font-size: 1.05rem;
  }
  .post-body {
    padding: 0.85rem 0.8rem;
  }
  .create-post-form {
    padding: 1.25rem 1rem;
  }
  .error-page {
    padding: 3rem 1.5rem;
  }

  .toast {
    left: 1rem;
    right: 1rem;
    max-width: none;
  }

  .comment {
    padding: 0.8rem 0.85rem;
  }
}