:root {
  --bg: #0b1020;
  --panel: #121a2e;
  --card: #16213a;
  --text: #e6f1ff;
  --muted: #8ca0c6;
  --accent: #20f3ff;
  --accent-2: #ff8a3d;
  --line: rgba(255, 255, 255, 0.08);
  --danger: #ff5d7a;
  --success: #4ade80;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, "Segoe UI", Roboto, sans-serif;
  background: radial-gradient(circle at 20% 0%, #14203d, var(--bg) 45%);
  color: var(--text);
  min-height: 100vh;
}

h1, h2, h3, p { margin: 0; }

/* ──────────────── Header ──────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  gap: 12px;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: rgba(10, 14, 28, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-icon {
  font-size: 22px;
  color: var(--accent);
  line-height: 1;
}

.site-header h1 {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.03em;
}

.site-header p {
  color: var(--muted);
  font-size: 12px;
  margin-top: 2px;
}

.header-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-shrink: 0;
}

/* ──────────────── Layout ──────────────── */
.layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding: 12px;
}

/* ──────────────── Admin Panel ──────────────── */
.admin-panel {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(170deg, var(--panel), #111829);
  padding: 16px;
  display: grid;
  gap: 14px;
  align-content: start;
}

.admin-panel h2 {
  font-size: 16px;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.control-group {
  display: grid;
  gap: 8px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255,255,255,0.02);
}

.control-group h3 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 4px;
}

.admin-panel label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--muted);
  font-size: 13px;
}

.admin-panel label.checkbox-row {
  justify-content: flex-start;
  gap: 8px;
  cursor: pointer;
}

input[type="range"] {
  width: 100%;
  padding: 0;
  accent-color: var(--accent-2);
  cursor: pointer;
}

input[type="text"],
input[type="url"],
textarea,
input[type="file"] {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(10, 16, 32, 0.75);
  color: var(--text);
  padding: 10px;
  font: inherit;
}

input[type="text"]:focus,
input[type="url"]:focus,
textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.full-width { width: 100%; }

/* Stats */
.stats h3 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 10px;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 14px;
}

.stat-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(32,243,255,0.04);
}

.stat-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
}

.stat-label {
  font-size: 11px;
  color: var(--muted);
  margin-top: 2px;
}

/* Category chart */
.category-chart {
  display: grid;
  gap: 6px;
}

.chart-row {
  display: grid;
  grid-template-columns: 70px 1fr 30px;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--muted);
}

.chart-label {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chart-track {
  height: 8px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--line);
  overflow: hidden;
}

.chart-bar {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.35s ease;
}

.chart-count {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* ──────────────── Content Panel ──────────────── */
.content-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

/* Composer */
.composer-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(170deg, var(--panel), #111829);
  overflow: hidden;
}

.composer-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 14px 16px;
  background: transparent;
  border: none;
  color: var(--accent);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  text-align: left;
}

.composer-toggle::after {
  content: "▾";
  margin-left: auto;
  transition: transform 0.2s ease;
}

.composer-toggle[aria-expanded="true"]::after {
  transform: rotate(180deg);
}

.composer-body {
  padding: 0 16px 16px;
}

#postForm {
  display: grid;
  gap: 8px;
}

#postForm label {
  font-size: 13px;
  color: var(--muted);
}

.char-count {
  font-size: 11px;
  color: var(--muted);
  text-align: right;
  margin-top: -4px;
}

.form-message {
  min-height: 18px;
  color: var(--muted);
  font-size: 13px;
}

.form-message.error { color: var(--danger); }
.form-message.success { color: var(--success); }

/* Feed header + filter bar */
.feed-header {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feed-header h2 {
  font-size: 18px;
}

.filter-bar {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.04);
  color: var(--muted);
  font-size: 12px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.filter-btn:hover {
  background: rgba(32,243,255,0.08);
  color: var(--text);
}

.filter-btn.active {
  background: rgba(32,243,255,0.15);
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}

/* Feed list */
.feed-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.feed-item {
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 12px;
  padding: 14px;
  background: var(--card);
  animation: fadeUp 300ms ease both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.feed-item.user-post {
  border-left-color: var(--accent-2);
}

.feed-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 8px;
}

.feed-author {
  font-weight: 600;
  color: var(--text);
}

.feed-major {
  color: var(--accent);
  font-size: 12px;
  margin-top: 2px;
}

.feed-time {
  flex-shrink: 0;
  font-size: 12px;
}

.feed-text {
  margin-bottom: 8px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
}

.feed-image {
  width: 100%;
  max-height: 280px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--line);
  margin: 6px 0 10px;
  display: block;
}

.feed-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.feed-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.feed-tags span {
  font-size: 11px;
  padding: 3px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--accent);
}

.like-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 12px;
  color: var(--muted);
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  flex-shrink: 0;
}

.like-btn:hover {
  background: rgba(255,90,130,0.15);
  border-color: #ff5d7a;
  color: #ff5d7a;
}

.like-btn.liked {
  background: rgba(255,90,130,0.18);
  border-color: #ff5d7a;
  color: #ff5d7a;
  font-weight: 600;
}

/* Buttons */
.primary-btn,
.secondary-btn {
  border-radius: 10px;
  padding: 10px 14px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  font: inherit;
  font-size: 14px;
  transition: opacity 0.15s;
}

.primary-btn:hover,
.secondary-btn:hover { opacity: 0.85; }

.primary-btn {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: #061022;
}

.secondary-btn {
  background: rgba(32, 243, 255, 0.08);
  border: 1px solid var(--accent);
  color: var(--accent);
}

/* Load more */
.load-more-wrapper {
  display: flex;
  justify-content: center;
  padding: 8px 0 16px;
}

/* Admin toggle (mobile only) */
.admin-toggle-btn { display: flex; }

/* ──────────────── Desktop ──────────────── */
@media (min-width: 1024px) {
  .layout {
    grid-template-columns: minmax(300px, 340px) minmax(0, 1fr);
    padding: 16px 24px 32px;
    align-items: start;
  }

  .admin-panel {
    position: sticky;
    top: 74px;
    max-height: calc(100vh - 90px);
    overflow-y: auto;
    scrollbar-width: thin;
  }

  .admin-toggle-btn { display: none; }

/* Ensure admin panel always visible on desktop — overrides the mobile display:none */
}

/* ──────────────── Mobile: admin panel hidden by default ──────────────── */
@media (max-width: 1023px) {
  .admin-panel {
    display: none;
  }

  .admin-panel.open {
    display: grid;
  }
}