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

:root {
  --burgundy:   #3f74d4;
  --burgundy-l: #6494e8;
  --burgundy-d: #16294e;
  --burgundy-xl:#6494e8;
  --bg:         #0c1322;
  --surface:    #141f36;
  --surface-2:  #18233c;
  --border:     #22304d;
  --border-l:   #2c3b5e;
  --text:       #e9eef8;
  --text-muted: #6e7f9d;
  --text-dim:   #9fb0cb;
  --radius:     10px;
  --sidebar-w:  260px;
}

html, body { height: 100%; }

body {
  font-family: 'Public Sans', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

/* ── App shell ── */
.app {
  display: flex;
  min-height: 100vh;
}

/* ── Sidebar ── */
.sidebar {
  width: var(--sidebar-w);
  min-height: 100vh;
  background: #0a101c;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  flex-shrink: 0;
}

.sidebar-top {
  padding: 1.4rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: .75rem;
}

.sidebar-logo-icon {
  width: 34px;
  height: 34px;
  background: var(--burgundy);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sidebar-logo-name {
  font-size: .82rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
}

.sidebar-logo-sub {
  font-size: .6rem;
  color: var(--text-muted);
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-top: .1rem;
}

.sidebar-nav {
  flex: 1;
  padding: .85rem .75rem;
  display: flex;
  flex-direction: column;
  gap: .15rem;
}

.sidebar-section-label {
  font-size: .58rem;
  font-weight: 700;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: #38486e;
  padding: .9rem .65rem .35rem;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .55rem .65rem;
  border-radius: 7px;
  font-size: .84rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color .15s, background .15s;
  position: relative;
}

.sidebar-link svg { flex-shrink: 0; opacity: .7; transition: opacity .15s; }
.sidebar-link:hover { color: var(--text); background: rgba(255,255,255,.04); }
.sidebar-link:hover svg { opacity: 1; }

.sidebar-link.active {
  color: #fff;
  background: rgba(63,116,212,.28);
}
.sidebar-link.active svg { opacity: 1; }
.sidebar-link.active::before {
  content: '';
  position: absolute;
  left: 0; top: 20%; bottom: 20%;
  width: 3px;
  background: var(--burgundy-l);
  border-radius: 0 3px 3px 0;
}

.sidebar-badge {
  margin-left: auto;
  background: var(--burgundy-l);
  color: #fff;
  font-size: .6rem;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  padding: .15rem .42rem;
  border-radius: 999px;
  min-width: 18px;
  text-align: center;
}

.sidebar-footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border);
}

.sidebar-user-name {
  font-size: .84rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: .3rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-user-meta {
  display: flex;
  align-items: center;
  gap: .45rem;
  margin-bottom: .75rem;
  flex-wrap: wrap;
}

.role-badge {
  font-size: .58rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: .15rem .5rem;
  border-radius: 4px;
}
.role-admin   { background: rgba(63,116,212,.35); color: var(--burgundy-xl); }
.role-teacher { background: rgba(0,80,160,.2);  color: #60a8ff; }
.role-student { background: rgba(40,40,40,.6);  color: var(--text-dim); }

.sidebar-div-label {
  font-size: .68rem;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-muted);
}

.sidebar-logout {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-size: .75rem;
  color: #3d4d6e;
  transition: color .15s;
}
.sidebar-logout:hover { color: var(--text-dim); }

/* ── Main content ── */
.main {
  flex: 1;
  overflow: auto;
  background: var(--bg);
  display: flex;
  flex-direction: column;
}

.main-header {
  padding: 2rem 2.5rem 1.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.main-title {
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -.025em;
}

.main-content {
  padding: 2rem 2.5rem;
  flex: 1;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .55rem 1.1rem;
  border-radius: 7px;
  font-size: .82rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  border: none;
  transition: background .18s, color .18s, transform .12s;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }

.btn-primary { background: var(--burgundy); color: #fff; }
.btn-primary:hover { background: var(--burgundy-l); }

.btn-ghost {
  background: var(--surface-2);
  border: 1px solid var(--border-l);
  color: var(--text-dim);
}
.btn-ghost:hover { color: var(--text); background: var(--surface); }

.btn-danger { background: rgba(180,30,30,.2); border: 1px solid rgba(180,30,30,.3); color: #f87171; }
.btn-danger:hover { background: rgba(180,30,30,.35); }

.btn-sm { padding: .35rem .75rem; font-size: .75rem; }

/* ── Cards ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: .75rem;
  transition: border-color .2s;
}
.card:hover { border-color: var(--border-l); }

/* ── Announcements ── */
.ann-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem 1.6rem;
  margin-bottom: .65rem;
  transition: border-color .2s;
  position: relative;
}
.ann-card:hover { border-color: var(--border-l); }
.ann-card.pinned {
  border-color: rgba(63,116,212,.5);
  background: rgba(63,116,212,.06);
}

.ann-pin-mark {
  position: absolute;
  top: 1rem; right: 1.2rem;
  display: flex;
  align-items: center;
  gap: .3rem;
  font-size: .6rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--burgundy-xl);
}

.ann-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: .45rem;
  letter-spacing: -.01em;
  padding-right: 4rem;
}

.ann-content {
  font-size: .875rem;
  color: var(--text-dim);
  line-height: 1.75;
  margin-bottom: 1rem;
  white-space: pre-wrap;
}

.ann-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .5rem;
}

.ann-meta-left {
  font-size: .72rem;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-muted);
}

.ann-actions { display: flex; gap: .4rem; }

/* ── Post form ── */
.post-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.75rem;
}
.post-form-title {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--burgundy-l);
  margin-bottom: 1rem;
}
.form-row { display: flex; flex-direction: column; gap: .4rem; margin-bottom: .85rem; }
.form-row label { font-size: .75rem; font-weight: 600; color: var(--text-dim); }
.form-input, .form-textarea, .form-select {
  background: var(--surface-2);
  border: 1px solid var(--border-l);
  border-radius: 7px;
  padding: .55rem .85rem;
  font-size: .875rem;
  font-family: inherit;
  color: var(--text);
  transition: border-color .15s;
  outline: none;
}
.form-input:focus, .form-textarea:focus, .form-select:focus {
  border-color: var(--burgundy-l);
}
.form-textarea { resize: vertical; min-height: 90px; }
.form-select { cursor: pointer; }
.form-check {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .82rem;
  color: var(--text-dim);
  cursor: pointer;
}
.form-row-inline { display: flex; gap: .75rem; flex-wrap: wrap; }
.form-row-inline .form-row { flex: 1; min-width: 140px; margin-bottom: 0; }

/* ── Resources ── */
.resource-category {
  font-size: .65rem;
  font-weight: 700;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 1.5rem 0 .6rem;
  padding-bottom: .4rem;
  border-bottom: 1px solid var(--border);
}
.resource-category:first-of-type { margin-top: 0; }

.resource-card {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: .5rem;
  transition: border-color .2s;
}
.resource-card:hover { border-color: var(--border-l); }

.resource-link {
  font-size: .9rem;
  font-weight: 600;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  margin-bottom: .2rem;
  transition: color .15s;
}
.resource-link:hover { color: var(--burgundy-xl); }

.resource-desc {
  font-size: .78rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ── Schedule ── */
.meeting-card {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.5rem;
  margin-bottom: .5rem;
  transition: border-color .2s;
}
.meeting-card:hover { border-color: var(--border-l); }
.meeting-card.canceled { opacity: .5; }

.meeting-date {
  flex: 0 0 120px;
  font-family: 'JetBrains Mono', monospace;
  font-size: .8rem;
  color: var(--text-dim);
}

.meeting-info { flex: 1; }
.meeting-topic { font-size: .9rem; font-weight: 600; margin-bottom: .15rem; }
.meeting-location { font-size: .76rem; color: var(--text-muted); }

.meeting-status { flex: 0 0 auto; }

.status-badge {
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: .2rem .6rem;
  border-radius: 5px;
}
.status-scheduled { background: rgba(0,140,60,.15); color: #4ade80; border: 1px solid rgba(0,140,60,.25); }
.status-canceled  { background: rgba(180,30,30,.15); color: #f87171; border: 1px solid rgba(180,30,30,.25); }

.meeting-actions { flex: 0 0 auto; display: flex; gap: .4rem; }

/* ── Members ── */
.members-section-label {
  font-size: .65rem;
  font-weight: 700;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 1.75rem 0 .65rem;
  padding-bottom: .4rem;
  border-bottom: 1px solid var(--border);
}
.members-section-label:first-of-type { margin-top: 0; }

.members-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: .6rem;
}

.member-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: .35rem;
  transition: border-color .2s;
}
.member-card:hover { border-color: var(--border-l); }

.member-name { font-size: .9rem; font-weight: 600; }
.member-meta {
  display: flex;
  align-items: center;
  gap: .45rem;
  flex-wrap: wrap;
}
.member-detail {
  font-size: .72rem;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-muted);
}

.member-role-form { margin-top: .5rem; display: flex; gap: .4rem; align-items: center; }
.member-role-form select {
  flex: 1;
  background: var(--surface-2);
  border: 1px solid var(--border-l);
  border-radius: 5px;
  padding: .3rem .5rem;
  font-size: .72rem;
  font-family: inherit;
  color: var(--text);
  outline: none;
  cursor: pointer;
}

/* ── Admin pending ── */
.pending-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-bottom: .6rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.pending-info { flex: 1; min-width: 200px; }
.pending-name { font-size: .95rem; font-weight: 600; margin-bottom: .25rem; }
.pending-details {
  font-size: .75rem;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-muted);
}

.pending-role-req {
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: .15rem .5rem;
  border-radius: 4px;
  background: rgba(60,60,60,.5);
  color: var(--text-dim);
  margin-top: .35rem;
  display: inline-block;
}

.pending-actions {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-wrap: wrap;
}
.pending-actions select {
  background: var(--surface-2);
  border: 1px solid var(--border-l);
  border-radius: 6px;
  padding: .35rem .6rem;
  font-size: .78rem;
  font-family: inherit;
  color: var(--text);
  outline: none;
  cursor: pointer;
}

/* ── Empty state ── */
.empty {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-muted);
  font-size: .875rem;
}
.empty-icon { font-size: 2.5rem; margin-bottom: .75rem; opacity: .3; }

/* ── Auth pages (login, pending, etc.) ── */
.auth-page {
  min-height: 100vh;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.auth-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(63,116,212,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(63,116,212,.06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black, transparent);
  pointer-events: none;
}
.auth-glow {
  position: absolute; top: -20%; left: 50%;
  transform: translateX(-50%);
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(63,116,212,.15) 0%, transparent 65%);
  pointer-events: none;
}

.auth-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border-l);
  border-radius: 14px;
  padding: 2.5rem;
  width: 100%;
  max-width: 400px;
  margin: 1.5rem;
}

.auth-logo {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-bottom: 1.75rem;
}

.auth-logo-icon {
  width: 38px; height: 38px;
  background: var(--burgundy);
  border-radius: 9px;
  display: flex; align-items: center; justify-content: center;
}

.auth-club-name { font-size: .9rem; font-weight: 700; color: var(--text); }
.auth-club-sub {
  font-size: .62rem;
  color: var(--text-muted);
  letter-spacing: .1em;
  text-transform: uppercase;
}

.auth-title {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -.02em;
  margin-bottom: .4rem;
}

.auth-subtitle {
  font-size: .84rem;
  color: var(--text-dim);
  margin-bottom: 1.75rem;
  line-height: 1.6;
}

.auth-divider {
  height: 1px;
  background: var(--border);
  margin-bottom: 1.75rem;
}

.btn-google {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .65rem;
  width: 100%;
  padding: .75rem 1rem;
  background: #fff;
  border: none;
  border-radius: 8px;
  color: #38486e;
  font-size: .875rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background .15s, transform .12s;
  text-decoration: none;
}
.btn-google:hover { background: #f5f5f5; transform: translateY(-1px); }

.auth-note {
  margin-top: 1.25rem;
  font-size: .72rem;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.6;
}

.auth-error {
  background: rgba(180,30,30,.15);
  border: 1px solid rgba(180,30,30,.3);
  color: #fca5a5;
  font-size: .8rem;
  padding: .65rem .9rem;
  border-radius: 7px;
  margin-bottom: 1rem;
}

/* ── Demo page ── */
/* ── GPU pill (demo page header) ── */
.gpu-pill {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .3rem .75rem;
  border-radius: 999px;
  border: 1px solid var(--border-l);
  background: var(--surface-2);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .04em;
  cursor: default;
}
.gpu-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
  transition: background .4s;
}
.gpu-dot.ready  { background: #4ade80; box-shadow: 0 0 5px #4ade8088; animation: gpuGlow 2s ease-in-out infinite; }
.gpu-dot.busy   { background: #fbbf24; animation: gpuGlow 1s ease-in-out infinite; }
.gpu-dot.offline{ background: #3d4d6e; }
.gpu-txt        { color: #6e7f9d; transition: color .3s; }
@keyframes gpuGlow { 0%,100%{opacity:1} 50%{opacity:.4} }

/* Per-card GPU badge */
.demo-gpu-req {
  font-size: .6rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: .18rem .5rem;
  border-radius: 4px;
  border: 1px solid #38486e;
  background: #22304d22288;
  color: #5d6f8f;
  display: inline-block;
  transition: all .3s;
}

.demo-page {
  min-height: 100vh;
  background: var(--bg);
  padding: 3rem 3.5rem;
}

.demo-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 3rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.demo-logo {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.demo-logo-icon {
  width: 44px; height: 44px;
  background: var(--burgundy);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
}

.demo-club-name {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -.025em;
}

.demo-club-sub {
  font-size: .72rem;
  color: var(--text-muted);
  letter-spacing: .1em;
  text-transform: uppercase;
}

.demo-admin-badge {
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: .25rem .7rem;
  border-radius: 5px;
  background: rgba(63,116,212,.25);
  color: var(--burgundy-xl);
  border: 1px solid rgba(63,116,212,.3);
}

.demo-desc-section {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 2.75rem;
  margin-bottom: 3rem;
  align-items: start;
}

.demo-section-label {
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--burgundy-l);
  margin-bottom: .8rem;
}

.demo-description {
  font-size: 1rem;
  color: var(--text-dim);
  line-height: 1.85;
}

.demo-photo-placeholder {
  border: 1px dashed var(--border-l);
  border-radius: var(--radius);
  height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
}

.demo-photo-placeholder span {
  font-size: .65rem;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-muted);
  letter-spacing: .1em;
  text-transform: uppercase;
}

.demo-apps-label {
  font-size: .65rem;
  font-weight: 700;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  padding-bottom: .5rem;
  border-bottom: 1px solid var(--border);
}

.demo-apps-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.demo-app-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.75rem 2rem;
  display: flex;
  flex-direction: column;
  gap: .6rem;
  transition: border-color .2s, transform .2s;
  position: relative;
  overflow: hidden;
}
.demo-app-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--burgundy-d), transparent);
  opacity: 0;
  transition: opacity .25s;
}
.demo-app-card:hover { border-color: var(--burgundy-d); transform: translateY(-2px); }
.demo-app-card:hover::before { opacity: 1; }

.demo-app-tag {
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: .2rem .55rem;
  border-radius: 4px;
  display: inline-block;
  width: fit-content;
}
.tag-ml   { background: rgba(0,80,160,.2);  color: #60a8ff; border: 1px solid rgba(0,80,160,.3); }
.tag-nlp  { background: rgba(0,140,80,.2);  color: #50d090; border: 1px solid rgba(0,140,80,.3); }
.tag-cv   { background: rgba(140,80,0,.2);  color: #d0a050; border: 1px solid rgba(140,80,0,.3); }
.tag-game { background: rgba(80,0,120,.2);  color: #c084fc; border: 1px solid rgba(80,0,120,.3); }

.demo-app-name {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -.025em;
}
.demo-app-desc {
  font-size: .9rem;
  color: var(--text-dim);
  line-height: 1.75;
  flex: 1;
}
.demo-app-open {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .45rem;
  margin-top: .5rem;
  padding: .7rem 1.25rem;
  background: var(--burgundy);
  color: #fff;
  border-radius: 8px;
  font-size: .875rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  font-family: inherit;
  transition: background .18s, transform .12s;
  width: 100%;
}
.demo-app-open:hover { background: var(--burgundy-l); transform: translateY(-1px); }

/* ── Mobile header ── */
.mobile-header {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 52px;
  background: #0a101c;
  border-bottom: 1px solid var(--border);
  align-items: center;
  justify-content: space-between;
  padding: 0 1rem;
  z-index: 200;
  flex-shrink: 0;
}

.mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  border-radius: 7px;
  transition: background .15s, color .15s;
  flex-shrink: 0;
}
.mobile-menu-btn:hover { background: rgba(255,255,255,.06); color: var(--text); }

.mobile-header-title {
  font-size: .88rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -.01em;
}

.mobile-header-spacer { width: 36px; flex-shrink: 0; }

/* Backdrop for sidebar drawer */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.55);
  z-index: 149;
  backdrop-filter: blur(2px);
}
.sidebar-backdrop.open { display: block; }

/* ── Responsive ── */
@media (max-width: 900px) {
  .demo-desc-section { grid-template-columns: 1fr; }
  .demo-apps-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  /* Show mobile header */
  .mobile-header { display: flex; }

  /* Sidebar becomes a slide-in drawer */
  .sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: 150;
    transform: translateX(-100%);
    transition: transform .28s cubic-bezier(.4,0,.2,1);
    box-shadow: 4px 0 24px rgba(0,0,0,.5);
  }
  .sidebar.open { transform: translateX(0); }

  /* Main content offset for the fixed mobile header */
  .main      { padding-top: 52px; }
  .main-header  { padding: 1.25rem 1.25rem 1rem; }
  .main-content { padding: 1.25rem 1.25rem; }

  /* Schedule cards stack */
  .meeting-card { flex-wrap: wrap; gap: .75rem; }
  .meeting-date { flex: 0 0 auto; }

  /* Demo page */
  .demo-page { padding: 1.5rem 1.25rem; }
  .demo-header { flex-direction: column; align-items: flex-start; gap: 1rem; }
  .demo-apps-grid { grid-template-columns: 1fr; }
}


/* ── Dashboard ── */
.dash-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.dash-card { display: flex; flex-direction: column; }
.dash-wide { grid-column: 1 / -1; }
.dash-meeting-topic { font-size: 1.1rem; font-weight: 700; margin: .35rem 0 .5rem; }
.dash-meeting-meta { display: flex; gap: .4rem; flex-wrap: wrap; }
.dash-meta-chip {
  font-size: .72rem;
  font-family: 'JetBrains Mono', monospace;
  background: var(--surface-2);
  border: 1px solid var(--border-l);
  border-radius: 5px;
  padding: .2rem .55rem;
  color: var(--text-dim);
}
.dash-empty { font-size: .85rem; color: var(--text-muted); line-height: 1.6; }
.dash-link {
  margin-top: auto;
  padding-top: .85rem;
  font-size: .8rem;
  font-weight: 600;
  color: var(--burgundy-xl);
}
.dash-link:hover { text-decoration: underline; }
.dash-progress-row { display: flex; align-items: baseline; gap: .6rem; margin: .3rem 0 .6rem; }
.dash-progress-num { font-size: 1.8rem; font-weight: 800; font-family: 'JetBrains Mono', monospace; color: var(--burgundy-xl); }
.dash-progress-total { font-size: 1rem; color: var(--text-muted); }
.dash-progress-caption { font-size: .8rem; color: var(--text-dim); }
.dash-bar-bg { height: 8px; background: var(--surface-2); border-radius: 999px; overflow: hidden; }
.dash-bar { height: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--burgundy), var(--burgundy-xl)); transition: width .5s ease; }
.dash-ann { padding: .55rem 0; border-bottom: 1px solid var(--border); }
.dash-ann:last-of-type { border-bottom: none; }
.dash-ann-title { font-size: .92rem; font-weight: 600; }
.dash-pin {
  font-size: .58rem; font-weight: 800; letter-spacing: .1em;
  color: var(--burgundy-xl); border: 1px solid rgba(100,148,232,.35);
  border-radius: 4px; padding: .08rem .4rem; margin-right: .5rem; vertical-align: 2px;
}
.dash-ann-meta { font-size: .72rem; color: var(--text-muted); margin-top: .15rem; }
.dash-res { display: block; font-size: .88rem; font-weight: 500; color: var(--text-dim); padding: .4rem 0; border-bottom: 1px solid var(--border); }
.dash-res:hover { color: var(--text); }
.dash-res:last-of-type { border-bottom: none; }

/* ── Curriculum ── */
.curr-intro { font-size: .92rem; color: var(--text-dim); line-height: 1.7; max-width: 640px; margin-bottom: 1.25rem; }
.curr-progress-card { margin-bottom: 1.25rem; }
.lesson-list { display: flex; flex-direction: column; gap: .6rem; }
.lesson-card {
  display: flex;
  align-items: flex-start;
  gap: .9rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.2rem;
  transition: border-color .15s;
}
.lesson-card:hover { border-color: var(--border-l); }
.lesson-done { opacity: .65; }
.lesson-done .lesson-title { text-decoration: line-through; text-decoration-color: var(--text-muted); }
.lesson-check-form { flex-shrink: 0; margin-top: .1rem; }
.lesson-check {
  width: 24px; height: 24px;
  border-radius: 7px;
  border: 1.5px solid var(--border-l);
  background: var(--surface-2);
  color: #4ade80;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: border-color .15s;
  padding: 0;
}
.lesson-check:hover { border-color: var(--burgundy-l); }
.lesson-done .lesson-check { border-color: rgba(74,222,128,.4); background: rgba(74,222,128,.08); }
.lesson-body { flex: 1; min-width: 0; }
.lesson-head { display: flex; align-items: baseline; gap: .6rem; }
.lesson-num { font-family: 'JetBrains Mono', monospace; font-size: .72rem; color: var(--text-muted); }
.lesson-title { font-size: .98rem; font-weight: 700; }
.lesson-desc { font-size: .84rem; color: var(--text-dim); line-height: 1.6; margin-top: .25rem; }
.lesson-actions { display: flex; align-items: center; gap: .5rem; flex-shrink: 0; }
.lesson-materials {
  font-size: .76rem; font-weight: 600;
  padding: .35rem .8rem;
  border: 1px solid var(--border-l);
  border-radius: 6px;
  color: var(--text-dim);
  transition: all .15s;
}
.lesson-materials:hover { color: var(--text); border-color: var(--burgundy-d); }
.lesson-delete {
  width: 24px; height: 24px;
  border-radius: 6px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-muted);
  font-size: .95rem;
  cursor: pointer;
}
.lesson-delete:hover { color: #f87171; border-color: #3d1515; }
.lesson-add-form { display: grid; grid-template-columns: 1fr 1.4fr 1fr auto; gap: .5rem; margin-top: .6rem; }

@media (max-width: 860px) {
  .dash-grid { grid-template-columns: 1fr; }
  .lesson-add-form { grid-template-columns: 1fr; }
  .lesson-card { flex-wrap: wrap; }
}

.card-label {
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: .6rem;
}