/* Paleta tipo Skool: fondo muy claro, surface blanca, acento amarillo. */
:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-2: #f0f2f7;
  --surface-3: #e9ecf2;
  --text: #0f172a;
  --text-2: #334155;
  --muted: #64748b;
  --muted-2: #94a3b8;
  --border: #e4e7eb;
  --border-strong: #cbd5e1;
  --accent: #facc15;
  --accent-dark: #eab308;
  --accent-soft: #fef3c7;
  --accent-text: #1f1500;
  --link: #2563eb;
  --link-hover: #1d4ed8;
  --danger: #dc2626;
  --danger-soft: #fee2e2;
  --ok: #16a34a;
  --ok-soft: #dcfce7;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow: 0 2px 8px rgba(15, 23, 42, 0.06);
  --radius: 12px;
  --radius-lg: 16px;
  --radius-pill: 999px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hover); }
h1, h2, h3, h4 { margin: 0 0 12px; color: var(--text); line-height: 1.25; font-weight: 700; }
h1 { font-size: 28px; }
h2 { font-size: 22px; }
h3 { font-size: 18px; }
p { margin: 0 0 12px; }
small { font-size: 12px; }
hr { border: 0; border-top: 1px solid var(--border); margin: 20px 0; }

/* ---- Header ---- */
.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  position: sticky;
  top: 0;
  z-index: 20;
}
.topbar .brand {
  font-weight: 800;
  color: var(--text);
  font-size: 17px;
  letter-spacing: -0.01em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.topbar .brand::before {
  content: "";
  display: inline-block;
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  box-shadow: inset 0 0 0 2px rgba(255,255,255,0.4);
}
.topbar nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}
.topbar nav a {
  color: var(--text-2);
  padding: 8px 12px;
  border-radius: 8px;
  font-weight: 500;
  font-size: 14px;
}
.topbar nav a:hover { background: var(--surface-2); color: var(--text); }
.topbar .user-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px 6px 6px;
  background: var(--surface-2);
  border-radius: var(--radius-pill);
  color: var(--text);
  font-weight: 600;
  font-size: 14px;
}
.avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, #60a5fa, #a855f7);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-transform: uppercase;
  flex: 0 0 auto;
}
.avatar.sm { width: 24px; height: 24px; font-size: 10px; }
.avatar.lg { width: 56px; height: 56px; font-size: 22px; }
.logout-form { display: inline; margin: 0; }
.logout-form button {
  background: transparent;
  color: var(--muted);
  padding: 8px 12px;
  font-weight: 500;
  font-size: 14px;
  border: 0;
  border-radius: 8px;
  cursor: pointer;
}
.logout-form button:hover { color: var(--text); background: var(--surface-2); }

/* ---- Main layout ---- */
main { max-width: 1100px; margin: 28px auto; padding: 0 20px; }
main.wide { max-width: 1240px; }
main.narrow { max-width: 520px; }

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.page-header h1 { margin: 0; }
.muted { color: var(--muted); }
.muted-2 { color: var(--muted-2); }
.stack { display: flex; flex-direction: column; gap: 12px; }
.row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.row-tight { display: flex; align-items: center; gap: 6px; }

/* ---- Cards ---- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
  margin: 0 0 14px;
  box-shadow: var(--shadow-sm);
}
.card.narrow { max-width: 440px; margin: 40px auto; padding: 28px; }
.card.flush { padding: 0; overflow: hidden; }
.card-pad { padding: 18px; }
.muted-card { background: var(--surface-2); }
.card-link {
  display: block;
  text-decoration: none;
  color: inherit;
  transition: border-color .15s, transform .15s, box-shadow .15s;
}
.card-link:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}

.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.grid.tight { gap: 12px; }
.grid.courses { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }

/* ---- Forms ---- */
form label {
  display: block;
  margin: 14px 0 6px;
  color: var(--text-2);
  font-size: 13px;
  font-weight: 600;
}
form input, form textarea, form select {
  width: 100%;
  padding: 10px 12px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  color: var(--text);
  font: inherit;
  transition: border-color .15s, box-shadow .15s;
}
form input:focus, form textarea:focus, form select:focus {
  outline: none;
  border-color: var(--accent-dark);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
form textarea { resize: vertical; min-height: 80px; }
form small { display: block; margin-top: 4px; color: var(--muted); }

/* ---- Buttons ---- */
button, .btn {
  cursor: pointer;
  background: var(--accent);
  color: var(--accent-text);
  border: 0;
  padding: 10px 18px;
  border-radius: 10px;
  font: inherit;
  font-weight: 700;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  transition: background .15s, transform .05s;
}
button:hover, .btn:hover { background: var(--accent-dark); color: var(--accent-text); }
button:active, .btn:active { transform: translateY(1px); }
button:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: var(--accent-text); }
.btn-ghost {
  background: transparent;
  color: var(--text-2);
  border: 1px solid var(--border-strong);
}
.btn-ghost:hover { background: var(--surface-2); color: var(--text); }
.btn-link {
  background: transparent;
  color: var(--link);
  padding: 6px 8px;
  font-weight: 600;
}
.btn-link:hover { background: transparent; color: var(--link-hover); text-decoration: underline; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; color: #fff; }

/* ---- Alerts ---- */
.alert {
  padding: 12px 16px;
  border-radius: 10px;
  margin: 0 0 16px;
  border: 1px solid transparent;
  font-size: 14px;
}
.alert-error { background: var(--danger-soft); color: var(--danger); border-color: #fecaca; }
.alert-info { background: #dbeafe; color: #1e40af; border-color: #bfdbfe; }
.alert-success { background: var(--ok-soft); color: var(--ok); border-color: #bbf7d0; }

/* ---- Tags / badges ---- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--surface-2);
  color: var(--muted);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
}
.tag-accent { background: var(--accent-soft); color: var(--accent-text); }
.tag-ok { background: var(--ok-soft); color: var(--ok); }
.tag-live { background: #fee2e2; color: var(--danger); }
.tag-live::before {
  content: "";
  width: 6px; height: 6px; border-radius: 50%; background: var(--danger);
  animation: pulse 1.2s infinite;
}
@keyframes pulse { 50% { opacity: 0.4; } }

/* ---- Space shell (hero + tabs + two-column) ---- */
.space-hero {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}
.space-hero .banner {
  height: 140px;
  background: linear-gradient(135deg, #6366f1, #ec4899, #f59e0b);
}
.space-hero .banner[data-gradient="1"] { background: linear-gradient(135deg, #6366f1, #ec4899, #f59e0b); }
.space-hero .banner[data-gradient="2"] { background: linear-gradient(135deg, #06b6d4, #3b82f6, #8b5cf6); }
.space-hero .banner[data-gradient="3"] { background: linear-gradient(135deg, #10b981, #0ea5e9, #6366f1); }
.space-hero .banner[data-gradient="4"] { background: linear-gradient(135deg, #f97316, #ef4444, #ec4899); }
.space-hero .banner[data-gradient="5"] { background: linear-gradient(135deg, #eab308, #f97316, #dc2626); }
.space-hero .banner[data-gradient="6"] { background: linear-gradient(135deg, #22d3ee, #14b8a6, #10b981); }

.space-hero .hero-body {
  padding: 18px 22px 0;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}
.space-hero .hero-ident {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-top: -40px;
}
.space-hero .space-icon {
  width: 72px;
  height: 72px;
  border-radius: 14px;
  background: var(--surface);
  border: 3px solid var(--surface);
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  text-transform: uppercase;
  flex: 0 0 auto;
  background-image: linear-gradient(135deg, #6366f1, #ec4899);
}
.space-hero .space-icon[data-gradient="1"] { background-image: linear-gradient(135deg, #6366f1, #ec4899); }
.space-hero .space-icon[data-gradient="2"] { background-image: linear-gradient(135deg, #06b6d4, #3b82f6); }
.space-hero .space-icon[data-gradient="3"] { background-image: linear-gradient(135deg, #10b981, #0ea5e9); }
.space-hero .space-icon[data-gradient="4"] { background-image: linear-gradient(135deg, #f97316, #ef4444); }
.space-hero .space-icon[data-gradient="5"] { background-image: linear-gradient(135deg, #eab308, #f97316); }
.space-hero .space-icon[data-gradient="6"] { background-image: linear-gradient(135deg, #22d3ee, #14b8a6); }
.space-hero h1 { font-size: 24px; margin: 2px 0 0; }
.space-hero .space-desc { color: var(--muted); margin: 4px 0 0; font-size: 14px; }
.space-hero .hero-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 22px 0;
  font-size: 13px;
  color: var(--muted);
  flex-wrap: wrap;
}
.space-hero .hero-meta .dot { width: 4px; height: 4px; border-radius: 50%; background: var(--muted-2); }

.space-tabs {
  display: flex;
  gap: 4px;
  padding: 8px 14px 0;
  border-top: 1px solid var(--border);
  margin-top: 16px;
  overflow-x: auto;
  scrollbar-width: none;
}
.space-tabs::-webkit-scrollbar { display: none; }
.space-tabs a {
  padding: 12px 14px;
  color: var(--muted);
  font-weight: 600;
  font-size: 14px;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color .15s, border-color .15s;
}
.space-tabs a:hover { color: var(--text); }
.space-tabs a.active {
  color: var(--text);
  border-bottom-color: var(--accent-dark);
}

.space-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 20px;
  align-items: start;
}
@media (max-width: 900px) {
  .space-layout { grid-template-columns: 1fr; }
  .space-sidebar { order: 2; }
}
.space-sidebar .card { margin-bottom: 16px; }
.space-sidebar h4 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin: 0 0 10px;
}
.space-sidebar .stat {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  font-size: 14px;
}
.space-sidebar .stat strong { font-weight: 700; color: var(--text); }

/* ---- Feed / posts ---- */
.post-composer textarea {
  min-height: 60px;
  resize: vertical;
}
.post-item .post-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.post-item .post-head .meta { display: flex; flex-direction: column; }
.post-item .post-head .meta strong { font-weight: 700; font-size: 14px; }
.post-item .post-head .meta small { color: var(--muted); }
.post-item h3 { margin: 4px 0; font-size: 17px; }
.post-item .post-body {
  color: var(--text-2);
  white-space: pre-wrap;
  word-wrap: break-word;
}
.post-item .post-actions {
  display: flex;
  gap: 14px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--muted);
}
.post-item .post-actions a { color: var(--muted); font-weight: 600; }
.post-item .post-actions a:hover { color: var(--text); }

.comment-list { display: flex; flex-direction: column; gap: 12px; margin-top: 8px; }
.comment {
  display: flex;
  gap: 10px;
}
.comment .comment-body-wrap {
  background: var(--surface-2);
  border-radius: 12px;
  padding: 10px 14px;
  flex: 1;
  min-width: 0;
}
.comment .comment-body-wrap strong { font-size: 13px; }
.comment .comment-body-wrap small { color: var(--muted); margin-left: 6px; }
.comment .comment-body { margin: 2px 0 0; white-space: pre-wrap; word-wrap: break-word; color: var(--text); }
.comment-children { margin-left: 32px; margin-top: 10px; }

/* ---- Course cards ---- */
.course-card {
  display: block;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: transform .15s, box-shadow .15s, border-color .15s;
  color: inherit;
  text-decoration: none;
}
.course-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: var(--border-strong);
}
.course-card .cover {
  height: 150px;
  background: linear-gradient(135deg, #6366f1, #ec4899);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 22px;
  text-align: center;
  padding: 0 16px;
}
.course-card .cover[data-gradient="1"] { background: linear-gradient(135deg, #6366f1, #ec4899); }
.course-card .cover[data-gradient="2"] { background: linear-gradient(135deg, #06b6d4, #3b82f6); }
.course-card .cover[data-gradient="3"] { background: linear-gradient(135deg, #10b981, #0ea5e9); }
.course-card .cover[data-gradient="4"] { background: linear-gradient(135deg, #f97316, #ef4444); }
.course-card .cover[data-gradient="5"] { background: linear-gradient(135deg, #eab308, #f97316); }
.course-card .cover[data-gradient="6"] { background: linear-gradient(135deg, #22d3ee, #14b8a6); }
.course-card .course-info { padding: 16px 18px; }
.course-card .course-info p { color: var(--muted); font-size: 14px; margin: 6px 0 0; }

/* ---- Course detail ---- */
.course-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}
@media (max-width: 900px) { .course-layout { grid-template-columns: 1fr; } }
.curriculum .module { margin-bottom: 18px; }
.curriculum .module > strong {
  display: block;
  padding: 0 2px 6px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}
.curriculum ul { list-style: none; padding: 0; margin: 0; }
.curriculum li a {
  display: flex;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--text-2);
  font-size: 14px;
  align-items: center;
}
.curriculum li a:hover { background: var(--surface-2); color: var(--text); }
.curriculum li a.active { background: var(--accent-soft); color: var(--accent-text); font-weight: 700; }
.curriculum li a .lesson-num {
  color: var(--muted);
  font-weight: 600;
  font-size: 12px;
  min-width: 22px;
}

/* ---- Members list ---- */
.member-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
}
.member-row:last-child { border-bottom: 0; }
.member-row .meta { flex: 1; min-width: 0; }
.member-row .meta strong { font-size: 14px; }
.member-row .meta small { color: var(--muted); display: block; }

/* ---- Empty state ---- */
.empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--muted);
}
.empty h3 { color: var(--text); margin-bottom: 8px; }

/* ---- Utility ---- */
.mt-0 { margin-top: 0 !important; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mb-0 { margin-bottom: 0 !important; }
.mb-2 { margin-bottom: 8px; }
.text-right { text-align: right; }