/* ===== CSS Variables — Light ===== */
:root {
  --primary: #3730a3;
  --primary-hover: #312e81;
  --secondary: #6366f1;
  --bg: #fffdf9;
  --surface: #ffffff;
  --surface2: #f5f3ee;
  --border: #e9e5dd;
  --text: #18181b;
  --text-muted: #71717a;
  --like-red: #e63946;
  --like-red-hover: #c1121f;
  --tag-bg: rgba(55,48,163,0.06);
  --tag-border: rgba(55,48,163,0.16);
  --blockquote-bg: rgba(55,48,163,0.04);
  --comment-hover-bg: rgba(55,48,163,0.05);
  --shadow: 0 1px 3px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.03);
  --shadow-hover: 0 8px 30px rgba(55,48,163,0.1);
  --header-bg: rgba(255,253,249,0.93);
  --radius: 10px;
  --transition: 0.18s ease;
}

/* ===== CSS Variables — Dark ===== */
[data-theme="dark"] {
  --primary: #818cf8;
  --primary-hover: #a5b4fc;
  --secondary: #6366f1;
  --bg: #0e0e10;
  --surface: #17171a;
  --surface2: #1f1f24;
  --border: #2e2e35;
  --text: #f4f4f5;
  --text-muted: #a1a1aa;
  --like-red: #f87171;
  --like-red-hover: #ef4444;
  --tag-bg: rgba(129,140,248,0.08);
  --tag-border: rgba(129,140,248,0.2);
  --blockquote-bg: rgba(129,140,248,0.06);
  --comment-hover-bg: rgba(129,140,248,0.07);
  --shadow: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-hover: 0 8px 30px rgba(129,140,248,0.12);
  --header-bg: rgba(14,14,16,0.93);
}


/* ===== No-transition utility (used during page restore to prevent flash) ===== */
.no-transition, .no-transition * {
  transition: none !important;
  animation: none !important;
}

/* ===== Background Canvas ===== */
#bgCanvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.18;
}
[data-theme="dark"] #bgCanvas { opacity: 0.13; }

/* push all page content above the canvas */
header, main, footer, .modal-overlay, .toast-container { position: relative; z-index: 1; }

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

html { scroll-behavior: smooth; }

@import url('https://fonts.googleapis.com/css2?family=Caveat:wght@400;700&display=swap');

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-hover); }

img { max-width: 100%; display: block; }

/* ===== Layout ===== */
.container { max-width: 860px; margin: 0 auto; padding: 0 20px; }

/* ===== Header / Nav ===== */
header {
  background: var(--header-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  max-width: 860px;
  margin: 0 auto;
}

.nav-logo {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.3px;
}

.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-links a { color: var(--text-muted); font-weight: 500; font-size: 0.9rem; }
.nav-links a:hover, .nav-links a.active { color: var(--text); }

/* ===== Theme Toggle ===== */
.theme-toggle {
  background: var(--surface2);
  border: 1.5px solid var(--border);
  color: var(--text);
  cursor: pointer;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all var(--transition);
  flex-shrink: 0;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}
.theme-toggle:hover { border-color: var(--primary); background: var(--tag-bg); color: var(--primary); }

/* ===== Hero ===== */
.hero { padding: 72px 20px 52px; text-align: center; }

.hero h1 {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
  color: var(--text);
}

.hero p {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 500px;
  margin: 0 auto 28px;
}

/* ===== Search ===== */
.search-wrap {
  position: relative;
  max-width: 480px;
  margin: 0 auto 4px;
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.95rem;
  pointer-events: none;
  opacity: 0.5;
}

.search-input {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 40px 10px 40px;
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow);
  -webkit-appearance: none;
}
.search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--tag-bg);
}
.search-input::placeholder { color: var(--text-muted); }
/* hide browser default clear button */
.search-input::-webkit-search-cancel-button { display: none; }

.search-clear {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text-muted);
  font-size: 0.7rem;
  padding: 2px 6px;
  cursor: pointer;
  font-family: inherit;
  line-height: 1.4;
  transition: all var(--transition);
}
.search-clear:hover { color: var(--text); border-color: var(--text-muted); }

.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: 20px;
}

.tag-btn {
  padding: 5px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  font-size: 0.82rem;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
}
.tag-btn:hover, .tag-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.tag-btn-clear {
  border-color: var(--text-muted);
  color: var(--text-muted);
}
.tag-btn-clear:hover {
  background: transparent !important;
  border-color: var(--like-red) !important;
  color: var(--like-red) !important;
}

/* ===== Post Grid ===== */
.posts-section { padding: 0 20px 80px; }

.posts-header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 28px;
}

.section-title {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
}

.results-count {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 20px;
}

/* ===== Post Card ===== */
.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  cursor: pointer;
  box-shadow: var(--shadow);
}
.post-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: var(--shadow-hover);
}

.post-card-header { padding: 22px 22px 0; }

.post-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 10px; }

.post-tag {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--tag-bg);
  color: var(--primary);
  border: 1px solid var(--tag-border);
  letter-spacing: 0.01em;
}

.post-title {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.4;
}

.post-excerpt {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.6;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-muted);
  font-size: 0.8rem;
  padding: 0 22px 14px;
}

/* shared avatar */
.avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.68rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
  border: 2px solid var(--surface);
}

.avatars { display: flex; flex-shrink: 0; }
.avatars .avatar + .avatar { margin-left: -10px; }

.post-meta-info { display: flex; flex-direction: column; gap: 1px; }
.post-author { font-weight: 600; color: var(--text); font-size: 0.83rem; }

.post-card-footer {
  border-top: 1px solid var(--border);
  padding: 12px 22px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.read-time  { font-size: 0.78rem; color: var(--text-muted); margin-left: auto; }
.read-count { font-size: 0.78rem; color: var(--text-muted); }
.modal-meta-reads { color: var(--text-muted); font-size: 0.78rem; }


/* ===== Like / Comment Buttons ===== */
.action-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px 11px;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  font-size: 0.82rem;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}
.action-btn:hover { border-color: var(--text-muted); color: var(--text); }

.like-btn.liked { color: var(--like-red); border-color: var(--like-red); background: rgba(239,68,68,0.07); }
.like-btn:hover { color: var(--like-red) !important; border-color: var(--like-red) !important; background: rgba(239,68,68,0.07) !important; }
.comment-btn:hover { color: var(--primary) !important; border-color: var(--primary) !important; background: var(--comment-hover-bg) !important; }
.pdf-btn { margin-left: auto; }
.pdf-btn:hover { color: var(--primary) !important; border-color: var(--primary) !important; background: var(--tag-bg) !important; }

/* ===== Modal Overlay ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}
.modal-overlay.open { opacity: 1; pointer-events: all; }

/* ===== Post Modal ===== */
.post-modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  width: 100%;
  max-width: 1100px;
  height: calc(100vh - 56px);
  max-height: 880px;
  overflow: hidden;
  transform: translateY(14px) scale(0.985);
  transition: transform 0.22s ease, opacity 0.22s ease;
  opacity: 0;
  box-shadow: 0 32px 80px rgba(0,0,0,0.22);
}
.modal-overlay.open .post-modal {
  transform: translateY(0) scale(1);
  opacity: 1;
}

#modalContent {
  display: grid;
  grid-template-columns: 260px 1fr;
  height: 100%;
  min-height: 0;
}

/* ── Left sidebar ── */
.modal-sidebar {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
  background: var(--surface2);
  padding: 28px 24px;
  overflow-y: auto;
  gap: 20px;
}

.modal-sidebar-top { display: flex; flex-direction: column; gap: 14px; }

/* author name links inside post meta */
.author-link {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition);
}
.author-link:hover { color: var(--primary-hover); text-decoration: underline; }

/* close button lives in the topbar — styled like topbar-btn but slightly different */
.modal-close {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px;
  border-radius: 7px;
  border: 1.5px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  font-size: 0.82rem;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.modal-close:hover { border-color: #ef4444; color: #ef4444; background: rgba(239,68,68,0.07); }

.modal-tags { display: flex; gap: 6px; flex-wrap: wrap; }

.modal-title {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text);
}

.modal-meta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  color: var(--text-muted);
  font-size: 0.82rem;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.modal-meta-authors {
  display: flex;
  align-items: center;
  gap: 8px;
}

.modal-meta .avatar { width: 30px; height: 30px; font-size: 0.72rem; border-color: var(--surface2); }

.modal-meta-info { display: flex; flex-direction: column; gap: 2px; }
.modal-meta-info .post-author { font-size: 0.83rem; }
.modal-meta-date { color: var(--text-muted); font-size: 0.78rem; }

.modal-sidebar-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.modal-sidebar-actions .action-btn {
  justify-content: flex-start;
  width: 100%;
  padding: 8px 12px;
}

/* ── Right content pane ── */
.modal-content-pane {
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

/* Single scrolling container for body + comments together.
   This lets comments be part of the same scroll flow as the post,
   so they appear below the content and scroll naturally. */
.modal-scroll-area {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.modal-body {
  padding: 32px 44px 28px;
  color: var(--text);
  line-height: 1.9;
  font-size: 1.01rem;
  -webkit-font-smoothing: antialiased;
  flex-shrink: 0;
}
.modal-body h1 { font-family: 'Space Grotesk', system-ui, sans-serif; font-size: 1.7rem;  font-weight: 700; margin: 0 0 20px;    color: var(--text); letter-spacing: -0.02em; }
.modal-body h2 { font-family: 'Space Grotesk', system-ui, sans-serif; font-size: 1.35rem; font-weight: 700; margin: 36px 0 12px; color: var(--text); letter-spacing: -0.01em; }
.modal-body h3 { font-family: 'Space Grotesk', system-ui, sans-serif; font-size: 1.1rem;  font-weight: 600; margin: 26px 0 8px; }
.modal-body h4 { font-family: 'Space Grotesk', system-ui, sans-serif; font-size: 0.95rem; font-weight: 600; margin: 20px 0 6px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.modal-body p  { margin-bottom: 18px; }
.modal-body ul, .modal-body ol { margin: 0 0 18px 24px; }
.modal-body li { margin-bottom: 7px; line-height: 1.75; }
.modal-body strong { font-weight: 650; color: var(--text); }
.modal-body em     { font-style: italic; color: var(--text-muted); }
.modal-body a      { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
.modal-body a:hover { color: var(--primary-hover); }
.modal-body hr { border: none; border-top: 1px solid var(--border); margin: 28px 0; }
.modal-body code {
  background: var(--surface2);
  border: 1px solid var(--border);
  padding: 2px 7px;
  border-radius: 5px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.84em;
  color: var(--primary);
  font-variant-ligatures: none;
}
.modal-body pre {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 22px;
  overflow-x: auto;
  margin-bottom: 22px;
  line-height: 1.65;
}
.modal-body pre code { background: transparent; border: none; padding: 0; font-size: 0.875rem; color: var(--text); }
.modal-body blockquote {
  border-left: 3px solid var(--primary);
  padding: 10px 18px;
  margin: 22px 0;
  background: var(--blockquote-bg);
  border-radius: 0 8px 8px 0;
  color: var(--text-muted);
  font-style: italic;
}
.modal-body table { width: 100%; border-collapse: collapse; margin-bottom: 22px; font-size: 0.93rem; }
.modal-body th, .modal-body td { padding: 9px 14px; border: 1px solid var(--border); text-align: left; }
.modal-body th { background: var(--surface2); font-weight: 600; }
/* diagrams and any other images inside post content */
.modal-body img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 28px auto;
  /* no border-radius or border — SVGs already have their own background */
}

/* ── Content pane top bar ── */
.modal-content-topbar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--surface2);
  flex-shrink: 0;
}

.topbar-spacer { flex: 1; }

.topbar-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px;
  border-radius: 7px;
  border: 1.5px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  font-size: 0.82rem;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.topbar-btn:hover { border-color: var(--primary); color: var(--primary); background: var(--tag-bg); }
.topbar-btn.active { border-color: var(--primary); color: var(--primary); background: var(--tag-bg); }

/* ===== Modal Actions (sidebar, not bottom bar) ===== */
.modal-actions { display: none; }

/* ===== Comments ===== */
.comments-section {
  border-top: 1px solid var(--border);
  padding: 26px 44px 40px;
  background: var(--surface);
}
.comments-section.comments-hidden { display: none; }

.comments-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.comments-title { font-size: 1rem; font-weight: 700; color: var(--text); margin: 0; }
.comment-form { margin-bottom: 28px; }
.comment-inputs { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 10px; }

.form-input {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 12px;
  color: var(--text);
  font-size: 0.88rem;
  outline: none;
  transition: border-color var(--transition);
  font-family: inherit;
}
.form-input:focus { border-color: var(--primary); }
.form-input::placeholder { color: var(--text-muted); }
textarea.form-input { resize: vertical; min-height: 88px; }

.submit-btn {
  margin-top: 10px;
  padding: 9px 22px;
  background: var(--primary);
  border: none;
  border-radius: 8px;
  color: #fff;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  font-family: inherit;
}
.submit-btn:hover { background: var(--primary-hover); transform: translateY(-1px); }
.submit-btn:active { transform: translateY(0); }

/* ── Tree comments ── */
.comments-list { display: flex; flex-direction: column; gap: 14px; }

.comment-node { position: relative; }

.comment-item {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
}
.comment-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 5px; }
.comment-author { font-weight: 600; font-size: 0.88rem; color: var(--text); }
.comment-date { font-size: 0.76rem; color: var(--text-muted); }
.comment-text { font-size: 0.88rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 6px; }
.no-comments { text-align: center; color: var(--text-muted); font-size: 0.88rem; padding: 18px 0; }

/*
 * Tree indentation:
 *  .comment-children  — indents replies 28px; draws the vertical thread line
 *  .comment-branch::before — horizontal connector from thread line to item
 *
 * Geometry (all relative to .comment-children left edge = 0):
 *   vertical line:  left 10px
 *   h-connector:    left -18px, width 17px  → tip lands at 10px - 18px + 17px = 9px ≈ line ✓
 */
.comment-children {
  position: relative;
  padding-left: 28px;
  margin-top: 10px;
}
.comment-children::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 0;
  bottom: 10px;
  width: 2px;
  background: var(--primary);
  opacity: 0.25;
  border-radius: 2px;
}
.comment-children.replies-collapsed { display: none; }

.comment-branch {
  position: relative;
  margin-bottom: 10px;
}
.comment-branch::before {
  content: "";
  position: absolute;
  left: -18px;
  top: 20px;
  width: 17px;
  height: 2px;
  background: var(--primary);
  opacity: 0.25;
}

/* "↩ ParentName" label */
.comment-reply-label {
  font-size: 0.74rem;
  color: var(--primary);
  margin-bottom: 6px;
  font-weight: 500;
}

/* action row */
.comment-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.reply-btn, .replies-toggle-btn {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 8px;
  background: transparent; border: 1px solid var(--border);
  border-radius: 5px; color: var(--text-muted);
  font-size: 0.76rem; font-family: inherit; cursor: pointer;
  transition: border-color var(--transition), color var(--transition);
}
.reply-btn:hover, .replies-toggle-btn:hover { border-color: var(--primary); color: var(--primary); }
.toggle-icon { font-size: 0.65rem; }


.reply-banner {
  display: flex; align-items: center; gap: 8px;
  background: var(--blockquote-bg); border: 1px solid var(--border);
  border-radius: 8px; padding: 7px 12px; margin-bottom: 10px;
  font-size: 0.84rem; color: var(--text-muted);
}
.reply-cancel {
  margin-left: auto; background: none; border: none;
  cursor: pointer; color: var(--text-muted); font-size: 0.85rem;
  padding: 0 4px; line-height: 1;
}
.reply-cancel:hover { color: var(--text); }

/* ===== About ===== */
.about-section { padding: 56px 20px 76px; }

.about-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  text-align: center;
  max-width: 600px;
  margin: 0 auto 32px;
  box-shadow: var(--shadow);
}

.about-avatar {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 800;
  color: #fff;
  margin: 0 auto 18px;
}

.about-name { font-family: 'Space Grotesk', system-ui, sans-serif; font-size: 1.7rem; font-weight: 700; margin-bottom: 4px; }
.about-title { color: var(--primary); font-weight: 500; font-size: 0.95rem; margin-bottom: 14px; }
.about-bio { color: var(--text-muted); line-height: 1.7; margin-bottom: 22px; font-size: 0.95rem; }

.social-links { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.social-link {
  padding: 7px 18px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}
.social-link:hover { border-color: var(--primary); color: var(--primary); background: var(--tag-bg); }

/* ===== Toast ===== */
.toast-container { position: fixed; bottom: 24px; right: 24px; z-index: 999; display: flex; flex-direction: column; gap: 8px; }
.toast {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 11px 16px;
  color: var(--text);
  font-size: 0.86rem;
  font-weight: 500;
  box-shadow: var(--shadow-hover);
  animation: slideInToast 0.25s ease, fadeOutToast 0.3s ease 2.7s forwards;
  display: flex;
  align-items: center;
  gap: 8px;
}
@keyframes slideInToast { from { transform: translateX(110%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes fadeOutToast { to { opacity: 0; transform: translateX(110%); } }

/* ===== Page System ===== */
.page { display: none; }
.page.active { display: block; }

/* ===== Footer ===== */
footer { border-top: 1px solid var(--border); padding: 24px 20px; text-align: center; color: var(--text-muted); font-size: 0.83rem; }

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 999px; }

/* ===== Responsive ===== */
@media (max-width: 700px) {
  .posts-grid { grid-template-columns: 1fr; }
  .comment-inputs { grid-template-columns: 1fr; }
  nav { flex-wrap: wrap; gap: 12px; }
  .modal-overlay { padding: 0; }
  .post-modal { height: 100vh; max-height: 100vh; border-radius: 0; }
  #modalContent { grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
  .modal-sidebar {
    border-right: none;
    border-bottom: 1px solid var(--border);
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    padding: 14px 18px;
    overflow-y: visible;
  }
  .modal-sidebar-top { flex-direction: row; flex-wrap: wrap; align-items: center; gap: 10px; flex: 1; }
  .modal-title { font-size: 1rem; }
  .modal-sidebar-actions { flex-direction: row; margin-top: 0; padding-top: 0; border-top: none; }
  .modal-sidebar-actions .action-btn { width: auto; }
  .modal-meta { flex-direction: row; padding-top: 0; border-top: none; }
  .modal-content-topbar { padding: 8px 18px; }
  .modal-body { padding: 20px 18px; }
  .comments-section { padding: 20px 18px 28px; }
}