* { box-sizing: border-box; }
[hidden] { display: none !important; }
:root {
  --brand: #7C3AED;
  --brand-dark: #5B21B6;
  --brand-light: #F3EEFE;
  --bg: #FFFFFF;
  --card: #FFFFFF;
  --border: #EFF1F3;
  --text: #0F1419;
  --text-muted: #66707A;
  --danger: #DC2626;
  --like: #E11D48;
  --like-bg: rgba(225, 29, 72, 0.1);
  --reshare: #059669;
  --reshare-bg: rgba(5, 150, 105, 0.1);
  --comment-color: #1D4ED8;
  --comment-bg: rgba(29, 78, 216, 0.1);
  --radius: 16px;
  --sidebar-w-wide: 275px;
  --sidebar-w-narrow: 88px;
  --feed-w: 600px;
  --right-w: 320px;
}

/* ---------- Dark mode (toggled via the light-bulb button) ---------- */
[data-theme="dark"] {
  --brand: #8B5CF6;
  --brand-dark: #A78BFA;
  --brand-light: #241B3D;
  --bg: #0F1419;
  --card: #16191F;
  --border: #262B33;
  --text: #E7E9EA;
  --text-muted: #8B98A5;
  --danger: #F87171;
  --like: #FB7185;
  --like-bg: rgba(251, 113, 133, 0.14);
  --reshare: #34D399;
  --reshare-bg: rgba(52, 211, 153, 0.14);
  --comment-color: #60A5FA;
  --comment-bg: rgba(96, 165, 250, 0.14);
}
[data-theme="dark"] .thought-card:hover,
[data-theme="dark"] .profile-tab:hover {
  background: rgba(255, 255, 255, 0.04);
}
[data-theme="dark"] .expiry-tag.expired { color: #FBBF24; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  transition: background-color 0.2s ease, color 0.2s ease;
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
textarea, input {
  font-family: inherit;
  font-size: 15px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  background: var(--card);
  color: var(--text);
  width: 100%;
}
textarea:focus, input:focus { outline: 2px solid var(--brand); outline-offset: -1px; }
svg { display: block; }

/* ---------- Shell layout ---------- */
.shell {
  display: flex;
  justify-content: center;
  min-height: 100vh;
  max-width: 1250px;
  margin: 0 auto;
}

.sidebar {
  width: var(--sidebar-w-narrow);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 8px;
  position: sticky;
  top: 0;
  height: 100vh;
  border-right: 1px solid var(--border);
}
.brand { display: flex; align-items: center; justify-content: center; gap: 10px; padding: 10px 8px; margin-bottom: 6px; }
.brand-text { display: none; font-weight: 800; font-size: 19px; color: var(--brand-dark); }
.logo-icon {
  display: block;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--brand-light);
  border: 1px solid var(--brand-light);
  padding: 4px;
  box-sizing: border-box;
}
.brand-th { color: #F59E0B; }

.side-links { display: flex; flex-direction: column; gap: 2px; }
.side-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 12px;
  border-radius: 999px;
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
}
.side-link:hover { background: var(--brand-light); }
.side-link.active { color: var(--brand-dark); }
.side-icon { display: flex; flex-shrink: 0; }
.side-label { display: none; }

.post-btn {
  margin-top: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--brand);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 12px;
  width: 52px;
  height: 52px;
  font-weight: 700;
  font-size: 15px;
  align-self: center;
}
.post-btn:hover { background: var(--brand-dark); }
.post-btn-label { display: none; }

.side-footer { margin-top: auto; }
.side-user-chip { display: none; }
.side-auth-buttons { display: none; }

/* ---------- Feed column ---------- */
.feed-col {
  width: 100%;
  max-width: var(--feed-w);
  border-right: 1px solid var(--border);
  min-height: 100vh;
  padding-bottom: 70px;
}

.feed-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
[data-theme="dark"] .feed-header { background: rgba(15, 20, 25, 0.85); }
.feed-header h1 { font-size: 19px; font-weight: 800; margin: 0; }
.back-link { font-size: 18px; font-weight: 700; padding: 6px; border-radius: 999px; }
.back-link:hover { background: var(--brand-light); }

.feed-wrap { display: flex; flex-direction: column; }
.feed { display: flex; flex-direction: column; }

/* ---------- Composer ---------- */
.composer-card { padding: 14px 16px; border-bottom: 1px solid var(--border); }
.composer-row { display: flex; gap: 12px; }
.composer-fields { flex: 1; display: flex; flex-direction: column; gap: 8px; }
.composer-fields textarea { border: none; padding: 8px 0; font-size: 18px; resize: vertical; }
.composer-fields textarea:focus { outline: none; }
.composer-fields > input[type="text"] { border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; font-size: 14px; font-family: inherit; }
.composer-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 10px; border-top: 1px solid var(--border); padding-top: 10px; }
.file-label { display: inline-flex; }
.composer-image-preview { display: flex; flex-wrap: wrap; gap: 8px; }
.composer-image-item { position: relative; width: 90px; height: 90px; }
.composer-image-item img { width: 100%; height: 100%; border-radius: 10px; display: block; object-fit: cover; }
.composer-image-remove {
  position: absolute; top: -6px; right: -6px; width: 20px; height: 20px; border-radius: 50%;
  background: var(--text); color: var(--bg); border: none; cursor: pointer; font-size: 14px; line-height: 1;
}

/* ---------- Rich text editor (bold/italic/underline/link) ---------- */
.rich-toolbar { display: flex; gap: 4px; }
.rich-btn {
  width: 28px; height: 28px; border-radius: 6px; border: 1px solid var(--border); background: var(--card);
  color: var(--text); cursor: pointer; font-size: 13px; display: flex; align-items: center; justify-content: center;
}
.rich-btn:hover { background: var(--brand-light); }
.rich-content {
  border: none; padding: 8px 0; font-size: 18px; line-height: 1.4; outline: none; min-height: 1.4em;
}
.rich-content:empty:before { content: attr(data-placeholder); color: var(--text-muted); }
.rich-content a { color: var(--brand); text-decoration: underline; }
.thought-edit-textarea.rich-content {
  font-size: 15px; min-height: 70px; border: 1px solid var(--border); border-radius: 10px; padding: 8px 10px;
}

/* ---------- Multiple images on a thought ---------- */
.thought-image-grid { display: grid; gap: 4px; }
.thought-image-grid-2 { grid-template-columns: 1fr 1fr; }
.thought-image-grid-3 { grid-template-columns: 1fr 1fr; }
.thought-image-grid-3 a:first-child { grid-row: span 2; }
.thought-image-grid-4 { grid-template-columns: 1fr 1fr; }
.thought-image-grid img { height: 100%; max-height: 260px; }
.thought-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.thought-tags .tag-chip { text-decoration: none; }

/* ---------- Sidebar: search + Topics ---------- */
.side-search {
  position: relative; margin: 4px 0 8px;
}
.side-search-icon {
  position: absolute; left: 10px; top: 50%; transform: translateY(-50%); color: var(--text-muted); display: flex;
}
.side-search input {
  width: 100%; padding: 8px 10px 8px 32px; border: 1px solid var(--border); border-radius: 999px;
  font-size: 13px; font-family: inherit; background: var(--card); color: var(--text);
}
.side-topics { margin: 4px 0; }
.side-topics-label { font-size: 12px; font-weight: 700; color: var(--text-muted); padding: 8px 12px 2px; }
.topic-link .side-icon svg { width: 20px; height: 20px; }

/* ---------- Settings: tag manager ---------- */
.tag-manager { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--border); }
.tag-manager h2 { margin: 0 0 4px; font-size: 17px; }
.settings-hint { font-size: 13px; color: var(--text-muted); margin: 0 0 12px; }
.tag-manager-list { list-style: none; margin: 0 0 12px; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.tag-manager-row { display: flex; gap: 8px; align-items: center; }
.tag-rename-input {
  flex: 1; min-width: 0; padding: 6px 10px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 14px; font-family: inherit;
}
.tag-add-form { display: flex; gap: 8px; }
.tag-add-form input { flex: 1; min-width: 0; padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; font-family: inherit; }
.tag-manager-name { flex: 1; font-size: 14px; font-weight: 600; }
.tag-manager-hint { font-size: 12px; color: var(--text-muted); }

/* ---------- Search page ---------- */
.search-page-form { display: flex; gap: 8px; padding: 12px 16px; }
.search-page-form input { flex: 1; min-width: 0; padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; font-family: inherit; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 999px;
  padding: 9px 18px;
  font-weight: 700;
  font-size: 14px;
  transition: background 0.15s ease, color 0.15s ease;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); }
.btn-ghost { background: transparent; color: var(--brand-dark); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--brand-light); }
.btn-small { padding: 6px 12px; font-size: 13px; }
.btn-full { width: 100%; }

.avatar {
  border-radius: 50%;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}

/* ---------- Thought rows (X-style) ---------- */
.thought-card {
  display: flex;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}
.thought-card:hover { background: #FAFAFB; }
.thought-avatar-link { flex-shrink: 0; }
.thought-main { flex: 1; min-width: 0; }
.thought-names { display: flex; flex-wrap: wrap; align-items: center; gap: 5px; font-size: 14px; }
.display-name { font-weight: 700; }
.username, .timestamp { color: var(--text-muted); font-size: 14px; }
.dot { color: var(--text-muted); }
.thought-body-link { color: inherit; display: block; }
.thought-body { font-size: 15px; line-height: 1.45; white-space: pre-wrap; margin-top: 2px; }
.thought-media img { width: 100%; border-radius: 14px; display: block; max-height: 420px; object-fit: cover; margin-top: 8px; }
.video-embed { position: relative; width: 100%; padding-top: 56.25%; border-radius: 14px; overflow: hidden; margin-top: 8px; }
.video-embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

.thought-actions { display: flex; justify-content: space-between; max-width: 440px; margin-top: 6px; }
.action-btn {
  display: flex; align-items: center; gap: 4px;
  background: none; border: none; color: var(--text-muted);
  font-size: 13px; font-weight: 500; padding: 0;
}
.action-icon-wrap { display: flex; align-items: center; justify-content: center; width: 32px; height: 32px; border-radius: 999px; }
.action-btn:hover .action-icon-wrap { background: var(--brand-light); color: var(--brand); }
.like-btn:hover .action-icon-wrap { background: var(--like-bg); color: var(--like); }
.like-btn.active { color: var(--like); }
.like-btn.active .action-icon-wrap svg path { fill: currentColor; }
.reshare-btn:hover .action-icon-wrap { background: var(--reshare-bg); color: var(--reshare); }
.reshare-btn.active { color: var(--reshare); }
.comment-action:hover .action-icon-wrap { background: var(--comment-bg); color: var(--comment-color); }
.edit-btn:hover .action-icon-wrap { background: var(--brand-light); color: var(--brand); }
.delete-btn:hover .action-icon-wrap { background: var(--like-bg); color: var(--danger); }

.reshare-tag { color: var(--text-muted); font-size: 12px; font-weight: 700; padding: 8px 16px 0; display: flex; align-items: center; gap: 6px; }

.expiry-tag { color: var(--text-muted); font-size: 13px; }
.expiry-tag.expired { color: #B45309; }
.edited-tag { color: var(--text-muted); font-size: 13px; font-weight: 400; }

/* ---------- Edit-in-place ---------- */
.thought-edit-form { display: flex; flex-direction: column; gap: 8px; margin-top: 4px; }
.thought-edit-textarea { font-size: 15px; resize: vertical; min-height: 70px; }
.thought-edit-actions { display: flex; align-items: center; justify-content: flex-end; gap: 8px; }
.thought-edit-actions .form-error { flex: 1; margin: 0; }

/* ---------- Composer duration picker ---------- */
.composer-duration { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; padding: 4px 0; }
.composer-duration-label { font-size: 13px; color: var(--text-muted); font-weight: 600; }
.duration-options { display: flex; gap: 6px; flex-wrap: wrap; }
.duration-option {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
}
.duration-option input { position: absolute; opacity: 0; width: 0; height: 0; }
.duration-option:has(input:checked),
.duration-option.checked { background: var(--brand-light); color: var(--brand-dark); border-color: var(--brand-light); }
.btn-icon { display: inline-flex; }
#composer-submit { gap: 6px; }

.login-prompt-card { text-align: center; display: flex; flex-direction: column; gap: 10px; align-items: center; padding: 20px 16px; border-bottom: 1px solid var(--border); }
.login-prompt-card.small { padding: 12px; border: 1px solid var(--border); border-radius: var(--radius); border-bottom: 1px solid var(--border); margin: 12px 16px; }
.login-prompt-actions { display: flex; gap: 10px; }

.form-error { color: var(--danger); font-size: 13px; min-height: 16px; display: block; }

/* ---------- Auth pages ---------- */
.auth-wrap { display: flex; justify-content: center; padding: 40px 16px; min-height: 100vh; }
.auth-card { width: 100%; max-width: 380px; display: flex; flex-direction: column; gap: 6px; align-items: center; text-align: center; }
.auth-logo {
  margin-bottom: 8px;
  border-radius: 50%;
  background: var(--brand-light);
  border: 1px solid var(--brand-light);
  padding: 6px;
  box-sizing: border-box;
}
.auth-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.auth-brand-text { font-weight: 800; font-size: 22px; color: var(--brand-dark); }
.auth-card h1 { margin: 0; font-size: 22px; }
.auth-sub { color: var(--text-muted); margin: 0 0 10px; }
.auth-form { display: flex; flex-direction: column; gap: 12px; width: 100%; text-align: left; }
.auth-form label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; font-weight: 600; color: var(--text-muted); }
.auth-switch { text-align: center; font-size: 14px; color: var(--text-muted); }
.auth-switch a { color: var(--brand); font-weight: 700; }
.auth-fineprint { font-size: 12px; color: var(--text-muted); text-align: center; margin-top: 4px; }
.forgot-result { width: 100%; text-align: left; font-size: 14px; color: var(--text); background: var(--brand-light); border-radius: 10px; padding: 12px 14px; }
.forgot-result p { margin: 0 0 8px; }
.forgot-result p:last-child { margin-bottom: 0; }
.forgot-result a { color: var(--brand-dark); font-weight: 700; }

.form-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }
@media (max-width: 480px) {
  .form-row-2, .form-row-3 { grid-template-columns: 1fr; }
}

/* ---------- Settings form ---------- */
.settings-form { display: flex; flex-direction: column; gap: 14px; padding: 16px; max-width: 480px; }
.settings-form label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; font-weight: 600; color: var(--text-muted); }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translate(-50%, 12px);
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--text);
  color: #fff;
  padding: 10px 18px 10px 12px;
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.18);
  opacity: 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.toast-bulb { display: flex; }
#toast-message { font-size: 14px; font-weight: 600; }

/* ---------- Comments ---------- */
.comments-section { display: flex; flex-direction: column; gap: 14px; padding: 16px; }
.comments-section h2 { margin: 0; font-size: 17px; }
.comment-form { display: flex; flex-direction: column; gap: 8px; }
.comment-input-row { display: flex; gap: 8px; align-items: flex-end; }
.comment-input-row textarea {
  flex: 1;
  min-width: 0;
  resize: none;
  overflow: hidden;
  max-height: 200px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  line-height: 1.4;
}
.comment-input-row button { flex-shrink: 0; }
.comment-guest-step { display: flex; flex-direction: column; gap: 8px; align-items: flex-start; }
.comment-guest-step input {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
}
.comment-list { display: flex; flex-direction: column; gap: 14px; }
.comment-row { display: flex; gap: 10px; }
.comment-body { flex: 1; }
.comment-meta { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; font-size: 13px; }
.comment-text { font-size: 14px; margin-top: 2px; }

/* ---------- Profile ---------- */
.profile-header { display: flex; gap: 16px; align-items: flex-start; padding: 20px 16px; border-bottom: 1px solid var(--border); }
.profile-avatar { width: 72px; height: 72px; font-size: 26px; }
.profile-info { flex: 1; }
.profile-name-row { display: flex; align-items: center; gap: 8px; }
.profile-name-row h1 { margin: 0; font-size: 20px; }
.profile-bio { margin: 6px 0; font-size: 14px; }
.profile-detail { font-size: 13px; color: var(--text-muted); margin-top: 4px; }
.profile-detail strong { color: var(--text); font-weight: 600; }
.profile-tags { font-size: 13px; color: var(--text-muted); margin-top: 6px; display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.profile-tags strong { color: var(--text); font-weight: 600; }
.tag-chip { background: var(--brand-light); color: var(--brand-dark); font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 999px; }
.profile-stats { display: flex; gap: 16px; font-size: 14px; margin-top: 10px; }
.profile-stats strong { color: var(--text); }
.profile-joined { color: var(--text-muted); font-size: 12px; margin-top: 4px; }
.profile-actions { flex-shrink: 0; }

.profile-tabs { display: flex; border-bottom: 1px solid var(--border); }
.profile-tab { flex: 1; text-align: center; padding: 14px; font-weight: 700; font-size: 14px; color: var(--text-muted); border-bottom: 2px solid transparent; }
.profile-tab:hover { background: #FAFAFB; }
.profile-tab.active { color: var(--text); border-bottom-color: var(--brand); }

.empty-state { text-align: center; padding: 40px 16px; color: var(--text-muted); }

/* ---------- Right column ---------- */
.right-col {
  width: var(--right-w);
  flex-shrink: 0;
  display: none;
  flex-direction: column;
  gap: 16px;
  padding: 16px 16px 16px 20px;
}
.right-card { background: var(--brand-light); border-radius: var(--radius); padding: 16px; }
.right-card h2 { margin: 0 0 6px; font-size: 17px; }
.right-card p { margin: 0 0 12px; font-size: 14px; color: var(--text-muted); }
.right-stats { display: flex; flex-direction: column; gap: 4px; font-size: 14px; }
.right-stats strong { color: var(--text); }

/* ---------- Owner dashboard card ---------- */
.dashboard-card { display: flex; flex-direction: column; gap: 14px; }
.dashboard-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.dashboard-stat { background: var(--card); border-radius: 10px; padding: 10px 12px; display: flex; flex-direction: column; }
.dashboard-stat strong { font-size: 20px; line-height: 1.2; }
.dashboard-stat span { font-size: 12px; color: var(--text-muted); }
.dashboard-section h3 { margin: 0 0 6px; font-size: 13px; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.03em; }
.dashboard-row { display: flex; align-items: baseline; gap: 6px; font-size: 13px; padding: 3px 0; }
.dashboard-row span:first-child { flex: 1; color: var(--text-muted); }
.dashboard-row strong { font-size: 14px; }
.dashboard-prev { color: var(--text-muted); font-size: 12px; }
.dashboard-sparkline { display: flex; align-items: flex-end; gap: 4px; height: 56px; }
.dashboard-bar { flex: 1; background: var(--brand); border-radius: 3px 3px 0 0; min-height: 4px; }

/* ---------- Personal intro (home page, logged out) ---------- */
.intro-card {
  display: flex;
  gap: 14px;
  padding: 20px 16px;
  border-bottom: 1px solid var(--border);
}
.intro-photo {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}
.intro-text p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.5;
  color: var(--text);
}
.intro-text p:last-child { margin-bottom: 0; }

/* ---------- Follow along card photo ---------- */
.follow-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}
.follow-card-name { font-weight: 700; font-size: 15px; }
.follow-card-followers { font-size: 12px; color: var(--text-muted); margin-top: 1px; }
.follow-card-followers strong { color: var(--text); }
.follow-card-title { margin: 2px 0 6px; font-size: 17px; }
.follow-photo {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

/* ---------- Settings: avatar upload ---------- */
.settings-avatar-row { display: flex; align-items: center; gap: 14px; }

/* ---------- Email follow + message (no login needed) ---------- */
.email-follow-form { display: flex; gap: 8px; }
.email-follow-form input {
  flex: 1;
  min-width: 0;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
}
.email-follow-form button { flex-shrink: 0; }
.visitor-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.visitor-actions .email-follow-form { flex: 1; min-width: 180px; }

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 15, 20, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 16px;
}
.modal-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 24px;
  width: 100%;
  max-width: 400px;
  position: relative;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}
.modal-card h2 { margin: 0 0 6px; font-size: 19px; }
.modal-sub { margin: 0 0 16px; font-size: 14px; color: var(--text-muted); }
.modal-close {
  position: absolute;
  top: 10px;
  right: 12px;
  background: none;
  border: none;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  color: var(--text-muted);
}
#message-form { display: flex; flex-direction: column; gap: 12px; }
#message-form label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; font-weight: 600; color: var(--text-muted); }
#message-form input,
#message-form textarea {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
}

/* ---------- Theme toggle (light bulb) ---------- */
.theme-toggle {
  position: fixed;
  top: 14px;
  right: 14px;
  z-index: 200;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid #14161a;
  background: #14161a;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.15s ease;
}
[data-theme="dark"] .theme-toggle {
  background: #ffffff;
  border-color: #ffffff;
  color: #14161a;
}
.theme-toggle:hover { transform: scale(1.07); }
.theme-toggle:active { transform: scale(0.94); }
.theme-toggle-icon { display: flex; align-items: center; justify-content: center; }
.theme-toggle-icon svg { width: 22px; height: 22px; }

.sidebar, .right-col, .thought-card, .composer-card, .right-card,
.auth-card, .modal-card, .login-prompt-card, .inbox-message, .inbox-list li,
.settings-form, .thought-edit-form {
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

/* ---------- Inbox (owner only) ---------- */
.inbox-section { margin-bottom: 28px; }
.inbox-section h2 { font-size: 17px; margin: 0 0 12px; }
.inbox-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.inbox-list li {
  display: flex;
  justify-content: space-between;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
}
.inbox-message { padding: 12px; border: 1px solid var(--border); border-radius: 10px; margin-bottom: 10px; }
.inbox-message-meta { display: flex; gap: 6px; align-items: center; font-size: 13px; margin-bottom: 6px; color: var(--text-muted); }
.inbox-message-body { font-size: 14px; white-space: pre-wrap; }
.inbox-footnote { font-size: 14px; padding: 0 4px; }

/* ---------- Mobile top bar (brand + search + About/Follow/Notify/Topics) ---------- */
.mobile-topbar {
  display: none;
  position: sticky;
  top: 0;
  z-index: 25;
  align-items: center;
  gap: 6px;
  /* extra right padding keeps everything clear of the fixed theme-toggle
     button, which floats at top:14px right:14px, width 44px */
  padding: 10px 60px 10px 12px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}
.mobile-topbar-brand { display: flex; align-items: center; gap: 6px; flex-shrink: 0; }
.mobile-topbar-brand .brand-text { display: inline; font-weight: 800; font-size: 15px; color: var(--brand-dark); white-space: nowrap; }
.mobile-search-form { position: relative; flex: 1 1 auto; min-width: 70px; }
.mobile-search-form .side-search-icon { position: absolute; left: 8px; top: 50%; transform: translateY(-50%); color: var(--text-muted); display: flex; }
.mobile-search-form .side-search-icon svg { width: 14px; height: 14px; }
.mobile-search-form input {
  width: 100%; padding: 6px 8px 6px 26px; border: 1px solid var(--border); border-radius: 999px;
  font-size: 12px; font-family: inherit; background: var(--card); color: var(--text);
}
.mobile-pill-btn {
  flex-shrink: 0; padding: 6px 11px; border-radius: 999px; border: 1px solid var(--border);
  background: var(--card); color: var(--text); font-size: 12px; font-weight: 700; white-space: nowrap;
}
.mobile-pill-btn:hover { background: var(--brand-light); }
.mobile-icon-btn {
  flex-shrink: 0; display: flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 999px; background: none; border: none; color: var(--text);
}
.mobile-icon-btn svg { width: 18px; height: 18px; }
.mobile-icon-btn:hover { background: var(--brand-light); }
.mobile-topics { position: relative; flex-shrink: 0; }
.mobile-topics summary {
  list-style: none; display: flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 999px; color: var(--text); cursor: pointer;
}
.mobile-topics summary svg { width: 18px; height: 18px; }
.mobile-topics summary::-webkit-details-marker { display: none; }
.mobile-topics summary:hover { background: var(--brand-light); }
.mobile-topics[open] summary { background: var(--brand-light); color: var(--brand-dark); }
.mobile-topics-list {
  position: absolute; right: 0; top: 38px; z-index: 30;
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 6px; min-width: 160px; max-height: 60vh; overflow-y: auto;
  box-shadow: 0 8px 24px rgba(0,0,0,0.18);
  display: flex; flex-direction: column;
}
.mobile-topics-list a { padding: 8px 10px; border-radius: 8px; font-size: 14px; color: var(--text); }
.mobile-topics-list a:hover { background: var(--brand-light); }

/* ---------- Mobile tab bar ---------- */
.mobile-tabbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-around;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--border);
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
}
[data-theme="dark"] .mobile-tabbar { background: rgba(15, 20, 25, 0.9); }
.tab-link { display: flex; color: var(--text); padding: 6px; }
.tab-link.active { color: var(--brand); }
.tab-post-btn {
  display: flex; align-items: center; justify-content: center;
  width: 44px; height: 44px;
  background: var(--brand); color: #fff;
  border: none; border-radius: 999px;
}

/* ================= Responsive breakpoints ================= */

/* Medium and up: icon-only sidebar always visible (already default above) */

/* Wide screens: full sidebar with labels + right column + hide mobile tab bar */
@media (min-width: 1080px) {
  .sidebar { width: var(--sidebar-w-wide); align-items: stretch; }
  .brand { justify-content: flex-start; }
  .brand-text { display: inline; }
  .side-link { justify-content: flex-start; }
  .side-label { display: inline; }
  .post-btn { width: 100%; border-radius: 999px; }
  .post-btn-label { display: inline; }
  .side-user-chip {
    display: flex; align-items: center; gap: 8px;
    padding: 10px; border-radius: 999px;
  }
  .side-user-chip:hover { background: var(--brand-light); }
  .side-user-info { flex: 1; min-width: 0; }
  .side-user-name { font-weight: 700; font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .side-user-handle { font-size: 13px; color: var(--text-muted); }
  .side-logout-btn { background: none; border: none; color: var(--text-muted); padding: 6px; border-radius: 999px; flex-shrink: 0; }
  .side-logout-btn:hover { background: var(--card); color: var(--text); }
  .side-auth-buttons { display: flex; flex-direction: column; gap: 8px; padding: 8px; }

  .right-col { display: flex; }
  .mobile-tabbar { display: none; }
  .feed-col { padding-bottom: 0; }
}

/* Narrow / mobile: hide sidebar entirely, show top bar + bottom tab bar,
   full width feed, and stack the right column (About/Follow card) below
   the feed instead of hiding it. */
@media (max-width: 699px) {
  .sidebar { display: none; }
  .mobile-topbar { display: flex; }
  .shell { flex-direction: column; justify-content: flex-start; }
  .feed-col { max-width: 100%; border-right: none; padding-bottom: 76px; }
  .right-col { display: flex; width: 100%; padding: 0 16px 16px; }
  /* About/Follow cards start closed on mobile — opened individually via
     the About/Follow buttons in the top bar (data-toggle-panel in app.js) */
  .mobile-panel { display: none; }
  .mobile-panel.mobile-panel-open { display: block; }
  .mobile-tabbar { display: flex; }
  .thought-actions { max-width: none; }
  .profile-header { flex-direction: column; align-items: center; text-align: center; }
  .profile-stats { justify-content: center; }
}

/* Between mobile and wide: icon-only sidebar, no right column (default styles already handle this) */