/* =====================================================================
   Kalviyogi — Light infographic app UI
   Mobile-first · soft pastels · aligned app shell
   ===================================================================== */

:root {
  color-scheme: light;

  /* Core brand — soft indigo */
  --primary:       #6366f1;
  --primary-dark:  #4f46e5;
  --primary-soft:  #eef2ff;
  --accent:        #8b5cf6;
  --gradient:      linear-gradient(135deg, #6366f1 0%, #8b5cf6 55%, #a78bfa 100%);

  /* Infographic pastels */
  --mint:          #ecfdf5;
  --mint-icon:     #10b981;
  --mint-text:     #047857;
  --sky:           #eff6ff;
  --sky-icon:      #3b82f6;
  --sky-text:      #1d4ed8;
  --peach:         #fff7ed;
  --peach-icon:    #f97316;
  --peach-text:    #c2410c;
  --lavender:      #f5f3ff;
  --lavender-icon: #8b5cf6;
  --lavender-text: #6d28d9;
  --rose:          #fff1f2;
  --rose-icon:     #f43f5e;
  --rose-text:     #be123c;
  --amber:         #fffbeb;
  --amber-icon:    #f59e0b;
  --slate:         #f1f5f9;
  --slate-icon:    #64748b;

  --success:       #10b981;
  --warning:       #f59e0b;
  --danger:        #ef4444;
  --info:          #0ea5e9;

  /* Surfaces */
  --bg:            #f4f7fb;
  --bg-top:        #eef2ff;
  --surface:       #ffffff;
  --surface-2:     #f8fafc;
  --border:        #e6ecf5;
  --border-soft:   rgba(99, 102, 241, .12);

  --text:          #1e293b;
  --text-muted:    #64748b;

  --radius:        18px;
  --radius-sm:     12px;
  --radius-pill:   999px;
  --shadow:        0 2px 12px rgba(30, 41, 59, .05);
  --shadow-md:     0 8px 24px rgba(30, 41, 59, .08);
  --shadow-lg:     0 16px 40px rgba(99, 102, 241, .12);

  --app-max:       480px;
  --app-pad:       16px;
  --nav-h:         68px;
  --sidebar-w:     240px;
  --safe-top:      env(safe-area-inset-top, 0px);
  --safe-bottom:   env(safe-area-inset-bottom, 0px);
}

/* Reset -------------------------------------------------------------- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Segoe UI', system-ui, -apple-system, 'Noto Sans Tamil', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary-dark); text-decoration: none; }
img { max-width: 100%; display: block; }
h1, h2, h3 { line-height: 1.25; letter-spacing: -.02em; }
.muted { color: var(--text-muted); }
code { background: var(--surface-2); padding: .1em .4em; border-radius: 6px; font-size: .85em; }

/* Cards -------------------------------------------------------------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem;
}

/* Buttons ------------------------------------------------------------ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .45rem;
  font: inherit; font-weight: 600; cursor: pointer;
  padding: .72rem 1.15rem; border-radius: var(--radius-sm);
  border: 1px solid transparent; background: var(--surface-2); color: var(--text);
  transition: transform .08s ease, box-shadow .2s ease, border-color .15s;
}
.btn:active { transform: scale(.98); }
.btn-gradient {
  background: var(--gradient); color: #fff;
  box-shadow: 0 6px 18px rgba(99, 102, 241, .28);
}
.btn-outline { background: #fff; border-color: var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary-dark); }
.btn-block { width: 100%; }
.btn-sm { padding: .48rem .85rem; font-size: .86rem; }

/* Alerts ------------------------------------------------------------- */
.alert { border-radius: var(--radius-sm); padding: .75rem 1rem; margin-bottom: .85rem; font-size: .92rem; border: 1px solid transparent; }
.alert-error   { background: #fef2f2; color: #991b1b; border-color: #fecaca; }
.alert-success { background: #ecfdf5; color: #065f46; border-color: #a7f3d0; }
.alert-info    { background: #eff6ff; color: #1e40af; border-color: #bfdbfe; }

/* Forms -------------------------------------------------------------- */
.field { display: block; margin-bottom: 1rem; }
.field span { display: block; font-size: .82rem; font-weight: 600; margin-bottom: .35rem; color: var(--text-muted); }
.field input, .field select, .field textarea {
  width: 100%; font: inherit; color: var(--text);
  padding: .72rem .9rem; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: #fff; transition: border-color .15s, box-shadow .15s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99, 102, 241, .12);
}

/* Logo badge --------------------------------------------------------- */
.logo-badge {
  width: 56px; height: 56px; border-radius: 16px; background: var(--gradient);
  color: #fff; font-weight: 800; font-size: 1.2rem;
  display: grid; place-items: center; margin: 0 auto .6rem;
  box-shadow: var(--shadow-lg);
}
.logo-badge.sm { width: 38px; height: 38px; font-size: .95rem; border-radius: 11px; margin: 0; }

/* =====================================================================
   AUTH PAGES
   ===================================================================== */
.auth-wrap {
  min-height: 100dvh; display: grid; place-items: center; padding: 1.2rem;
  background: linear-gradient(165deg, var(--bg-top) 0%, var(--bg) 45%);
}
.auth-card { width: 100%; max-width: 400px; padding: 1.8rem; box-shadow: var(--shadow-md); border: 1px solid var(--border); }
.auth-brand { text-align: center; margin-bottom: 1.4rem; }
.auth-brand h1 { font-size: 1.5rem; }
.auth-alt { text-align: center; margin-top: 1rem; font-size: .95rem; }
.auth-demo { text-align: center; margin-top: .6rem; font-size: .8rem; line-height: 1.6; }

/* =====================================================================
   STUDENT APP SHELL
   ===================================================================== */
.app-body {
  padding-top: var(--safe-top);
  background: linear-gradient(180deg, var(--bg-top) 0%, var(--bg) 22%, var(--bg) 100%);
  min-height: 100dvh;
}
.app-body.has-bottomnav .app-main {
  padding-bottom: calc(var(--nav-h) + var(--safe-bottom) + 20px);
}
.app-body.practice-page .app-main {
  padding-bottom: calc(var(--nav-h) + var(--safe-bottom) + 88px);
}

.practice-footer {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: calc(var(--nav-h) + var(--safe-bottom) + 12px);
  width: min(var(--app-max), calc(100% - var(--app-pad) * 2));
  z-index: 45;
  padding: .35rem 0;
  pointer-events: none;
}
.practice-footer .btn {
  pointer-events: auto;
  box-shadow: var(--shadow-lg);
}
.q-card.is-skipped { border-color: var(--border-soft); opacity: .92; }

.app-topbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; justify-content: space-between; gap: .75rem;
  max-width: var(--app-max); margin: 0 auto;
  padding: .85rem var(--app-pad) .65rem;
  background: rgba(255, 255, 255, .82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-soft);
}
.topbar-leading { min-width: 0; flex: 1; }
.greeting { font-size: .78rem; color: var(--text-muted); font-weight: 500; margin-bottom: .1rem; }
.topbar-title { font-size: 1.22rem; font-weight: 800; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.topbar-actions { display: flex; align-items: center; gap: .45rem; flex-shrink: 0; }
.avatar {
  width: 40px; height: 40px; border-radius: 50%; background: var(--gradient); color: #fff;
  display: grid; place-items: center; font-weight: 700; font-size: .95rem;
  box-shadow: 0 4px 12px rgba(99, 102, 241, .25);
}
.notif-bell {
  position: relative; width: 40px; height: 40px; border-radius: 50%;
  display: grid; place-items: center; color: var(--text-muted);
  background: #fff; border: 1px solid var(--border);
}
.notif-bell:hover { color: var(--primary); border-color: var(--border-soft); }
.notif-badge {
  position: absolute; top: 2px; right: 2px; min-width: 17px; height: 17px; padding: 0 4px;
  border-radius: var(--radius-pill); background: var(--danger); color: #fff;
  font-size: .62rem; font-weight: 800; display: grid; place-items: center;
  border: 2px solid #fff;
}

.app-main {
  max-width: var(--app-max); margin: 0 auto;
  padding: .5rem var(--app-pad) 1rem;
}
.app-section { margin-top: 1.35rem; }
.app-section:first-child { margin-top: .25rem; }

.section-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: .5rem; margin-bottom: .75rem;
}
.section-head h2 { font-size: 1rem; font-weight: 800; color: var(--text); }
.link-more { font-size: .82rem; font-weight: 700; color: var(--primary); white-space: nowrap; }

/* Infographic stat tiles --------------------------------------------- */
.infographic-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: .65rem;
}
.info-tile {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: .85rem .9rem;
  box-shadow: var(--shadow); display: flex; flex-direction: column; gap: .35rem;
}
.info-icon-wrap {
  width: 36px; height: 36px; border-radius: 11px;
  display: grid; place-items: center;
}
.info-num { font-size: 1.55rem; font-weight: 800; line-height: 1.1; color: var(--text); }
.info-label { font-size: .72rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: .04em; }
.info-tile--mint  { background: linear-gradient(145deg, #fff 0%, var(--mint) 100%); }
.info-tile--mint .info-icon-wrap  { background: #fff; color: var(--mint-icon); box-shadow: 0 2px 8px rgba(16,185,129,.15); }
.info-tile--sky   { background: linear-gradient(145deg, #fff 0%, var(--sky) 100%); }
.info-tile--sky .info-icon-wrap   { background: #fff; color: var(--sky-icon); box-shadow: 0 2px 8px rgba(59,130,246,.15); }
.info-tile--peach { background: linear-gradient(145deg, #fff 0%, var(--peach) 100%); }
.info-tile--peach .info-icon-wrap { background: #fff; color: var(--peach-icon); box-shadow: 0 2px 8px rgba(249,115,22,.15); }
.info-tile--lavender { background: linear-gradient(145deg, #fff 0%, var(--lavender) 100%); }
.info-tile--lavender .info-icon-wrap { background: #fff; color: var(--lavender-icon); box-shadow: 0 2px 8px rgba(139,92,246,.15); }

/* Hero CTA ----------------------------------------------------------- */
.hero-cta {
  display: flex; align-items: center; gap: .85rem;
  margin-top: .85rem; padding: 1rem 1.05rem;
  background: linear-gradient(135deg, #fff 0%, var(--primary-soft) 100%);
  border-color: var(--border-soft);
  color: inherit;
}
.hero-cta:hover { box-shadow: var(--shadow-md); border-color: rgba(99,102,241,.22); }
.hero-cta-icon {
  width: 48px; height: 48px; border-radius: 14px; flex-shrink: 0;
  display: grid; place-items: center;
  background: var(--gradient); color: #fff;
  box-shadow: 0 6px 16px rgba(99,102,241,.28);
}
.hero-cta-body { flex: 1; min-width: 0; }
.hero-cta-title { font-weight: 800; font-size: .98rem; margin-bottom: .12rem; }
.hero-cta-sub { font-size: .78rem; color: var(--text-muted); }
.hero-cta > .icon:last-child { color: var(--primary); flex-shrink: 0; }

/* Insight tiles ------------------------------------------------------ */
.insight-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: .65rem; margin-top: .85rem;
}
.insight-tile {
  display: flex; align-items: flex-start; gap: .6rem; padding: .85rem;
  color: inherit; min-height: 88px;
}
.insight-tile:hover { box-shadow: var(--shadow-md); }
.insight-icon {
  width: 34px; height: 34px; border-radius: 10px; flex-shrink: 0;
  display: grid; place-items: center; background: #fff;
}
.insight-label { font-size: .68rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--text-muted); margin-bottom: .2rem; }
.insight-value { font-size: .82rem; font-weight: 700; line-height: 1.35; color: var(--text); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.insight-tile--rose { background: linear-gradient(160deg, #fff 30%, var(--rose) 100%); }
.insight-tile--rose .insight-icon { color: var(--rose-icon); }
.insight-tile--sky { background: linear-gradient(160deg, #fff 30%, var(--sky) 100%); }
.insight-tile--sky .insight-icon { color: var(--sky-icon); }

/* Legacy stat grid (other pages) ------------------------------------- */
.stat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: .65rem; }
.stat { text-align: center; padding: .9rem .5rem; }
.stat-num { display: block; font-size: 1.35rem; font-weight: 800; color: var(--primary-dark); }
.stat-label { font-size: .7rem; color: var(--text-muted); font-weight: 600; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: .65rem; }
.mini { padding: .85rem; }
.mini-label { font-size: .68rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: .04em; font-weight: 700; }
.mini-value { font-weight: 700; margin-top: .25rem; font-size: .88rem; line-height: 1.35; }

/* Task list ---------------------------------------------------------- */
.task-list { list-style: none; display: grid; gap: .6rem; padding: 0; }
.task-item {
  display: grid; grid-template-columns: auto 1fr auto; align-items: start;
  gap: .7rem; padding: .9rem 1rem;
}
.task-item.is-done { opacity: .72; }
.task-item.is-done .task-title { text-decoration: line-through; color: var(--text-muted); }
.task-dot { width: 10px; height: 10px; border-radius: 50%; flex: none; margin-top: .45rem; }
.task-body { min-width: 0; }
.task-title { font-weight: 700; font-size: .92rem; line-height: 1.35; margin-bottom: .15rem; }
.task-meta { font-size: .76rem; line-height: 1.4; }
.task-check {
  width: 32px; height: 32px; border-radius: 50%; flex: none; cursor: pointer;
  border: 2px solid var(--border); background: #fff; color: var(--success);
  display: grid; place-items: center; margin-top: .15rem;
  transition: background .15s, border-color .15s, transform .08s;
}
.task-check:active { transform: scale(.94); }
.task-check .icon { visibility: hidden; }
.task-item.is-done .task-check { background: var(--success); border-color: var(--success); color: #fff; }
.task-item.is-done .task-check .icon { visibility: visible; }

.empty { text-align: center; padding: 1.8rem 1rem; }
.empty p + p { margin-top: .35rem; }

/* Quick tool grid — infographic tiles -------------------------------- */
.quick-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: .55rem;
}
.quick-tile {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: .35rem; padding: .75rem .35rem; min-height: 76px;
  border-radius: var(--radius-sm); border: 1px solid transparent;
  font-weight: 700; font-size: .68rem; text-align: center; color: var(--text);
  box-shadow: var(--shadow); transition: transform .1s, box-shadow .15s;
}
.quick-tile span:last-child { line-height: 1.2; }
.quick-tile:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.quick-ico { display: inline-flex; }
.quick-tile--indigo  { background: var(--primary-soft); color: var(--primary-dark); }
.quick-tile--indigo .quick-ico { color: var(--primary); }
.quick-tile--rose    { background: var(--rose); color: var(--rose-text); }
.quick-tile--rose .quick-ico { color: var(--rose-icon); }
.quick-tile--mint    { background: var(--mint); color: var(--mint-text); }
.quick-tile--mint .quick-ico { color: var(--mint-icon); }
.quick-tile--peach   { background: var(--peach); color: var(--peach-text); }
.quick-tile--peach .quick-ico { color: var(--peach-icon); }
.quick-tile--sky     { background: var(--sky); color: var(--sky-text); }
.quick-tile--sky .quick-ico { color: var(--sky-icon); }
.quick-tile--lavender{ background: var(--lavender); color: var(--lavender-text); }
.quick-tile--lavender .quick-ico { color: var(--lavender-icon); }
.quick-tile--amber   { background: var(--amber); color: #b45309; }
.quick-tile--amber .quick-ico { color: var(--amber-icon); }
.quick-tile--slate   { background: var(--slate); color: #475569; }
.quick-tile--slate .quick-ico { color: var(--slate-icon); }

/* Floating bottom nav ------------------------------------------------ */
.bottom-nav {
  position: fixed; z-index: 50;
  left: 50%; transform: translateX(-50%);
  bottom: calc(var(--safe-bottom) + 8px);
  width: min(var(--app-max), calc(100% - var(--app-pad) * 2));
  display: flex; align-items: center;
  background: rgba(255, 255, 255, .94);
  border: 1px solid var(--border);
  border-radius: 22px;
  box-shadow: var(--shadow-md);
  padding: .35rem .25rem;
  backdrop-filter: blur(12px);
}
.bottom-nav-link {
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 2px; padding: .4rem .15rem; border-radius: 14px;
  font-size: .58rem; font-weight: 700; color: var(--text-muted);
  min-width: 0; text-align: center;
  transition: color .15s, background .15s;
}
.bottom-nav-link span { display: block; max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bottom-nav-link .icon { display: block; margin: 0 auto; opacity: .85; }
.bottom-nav-link.is-active { color: var(--primary-dark); background: var(--primary-soft); }
.bottom-nav-link.is-active .icon { opacity: 1; color: var(--primary); }
.bottom-nav-link.nav-focus { color: var(--primary-dark); }
.bottom-nav-link.nav-focus .icon {
  background: var(--gradient); color: #fff; border-radius: 12px;
  width: 36px; height: 28px; padding: 4px;
  box-shadow: 0 4px 12px rgba(99, 102, 241, .3); opacity: 1;
}

/* =====================================================================
   ADMIN PANEL
   ===================================================================== */
.admin-body { background: var(--bg); }
.admin-shell { display: flex; min-height: 100vh; }

.admin-sidebar {
  width: var(--sidebar-w); flex: none; background: var(--surface);
  border-right: 1px solid var(--border); padding: 1rem .8rem;
  display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh;
}
.admin-brand { display: flex; align-items: center; gap: .6rem; padding: .4rem .5rem 1rem; }
.admin-brand small { display: block; font-size: .72rem; }
.admin-nav { display: grid; gap: .15rem; overflow-y: auto; }
.admin-nav a {
  display: flex; align-items: center; gap: .6rem; padding: .6rem .7rem; border-radius: 10px;
  color: var(--text); font-weight: 600; font-size: .92rem;
}
.admin-nav a:hover { background: var(--surface-2); }
.admin-nav a.is-active { background: var(--gradient); color: #fff; }
.nav-ico { width: 22px; text-align: center; }
.admin-logout { margin-top: auto; padding: .7rem; color: var(--danger); font-weight: 600; }

.admin-content { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.admin-topbar {
  display: flex; align-items: center; gap: 1rem; padding: 1rem 1.4rem;
  background: var(--surface); border-bottom: 1px solid var(--border);
}
.admin-page-title { font-size: 1.2rem; flex: 1; }
.admin-user { display: flex; align-items: center; gap: .6rem; font-size: .9rem; }
.role-chip { background: var(--surface-2); border: 1px solid var(--border); border-radius: 999px; padding: .2rem .7rem; font-size: .78rem; font-weight: 600; }
.menu-toggle { display: none; font-size: 1.3rem; background: none; border: none; cursor: pointer; color: var(--text); }
.admin-main { padding: 1.4rem; max-width: 1200px; width: 100%; }

/* KPI + panels */
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; }
.kpi { display: flex; align-items: center; gap: .9rem; }
.kpi-ico { font-size: 1.8rem; }
.kpi-num { display: block; font-size: 1.5rem; font-weight: 800; }
.kpi-label { font-size: .8rem; color: var(--text-muted); }

.two-col-wide { display: grid; grid-template-columns: 1.3fr 1fr; gap: 1rem; margin-top: 1.2rem; }
.panel { padding: 1.2rem; }
.quick-actions { display: grid; gap: .5rem; }
.plain-list { list-style: none; display: grid; gap: .5rem; font-size: .9rem; }

/* Data tables */
.data-table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.data-table th, .data-table td { text-align: left; padding: .6rem .5rem; border-bottom: 1px solid var(--border); }
.data-table th { font-size: .78rem; text-transform: uppercase; letter-spacing: .03em; color: var(--text-muted); }

/* =====================================================================
   RESPONSIVE
   ===================================================================== */
@media (max-width: 900px) {
  .two-col-wide { grid-template-columns: 1fr; }
  .admin-sidebar {
    position: fixed; left: 0; top: 0; z-index: 100; transform: translateX(-100%);
    transition: transform .25s ease; box-shadow: var(--shadow-lg);
  }
  .admin-sidebar.open { transform: translateX(0); }
  .menu-toggle { display: block; }
}
@media (max-width: 520px) {
  .quick-grid { grid-template-columns: repeat(4, 1fr); }
  .insight-value { font-size: .76rem; }
}
@media (min-width: 520px) {
  .app-main, .app-topbar { max-width: 520px; }
  .bottom-nav { width: min(520px, calc(100% - var(--app-pad) * 2)); }
}

/* =====================================================================
   MILESTONE 2/3 — CRUD, planner builder, learn surfaces
   ===================================================================== */

/* Badges */
.badge { display: inline-block; font-size: .7rem; font-weight: 700; padding: .12rem .5rem; border-radius: 999px; vertical-align: middle; }
.badge-success { background: #ecfdf5; color: #065f46; }
.badge-warn    { background: #fffbeb; color: #92400e; }
.badge-info    { background: #ecfeff; color: #155e75; }
.badge-danger  { background: #fef2f2; color: #991b1b; }
.badge-muted   { background: var(--surface-2); color: var(--text-muted); }

/* List headers + filters */
.list-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 1rem; flex-wrap: wrap; }
.filter-row { display: flex; align-items: center; gap: .6rem; }
.filter-row select, .filter-row input { padding: .5rem .7rem; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--surface); color: var(--text); font: inherit; }

/* Forms */
.form-card { max-width: 720px; }
.form-card h2, .form-card h3 { margin-bottom: 1rem; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: .3rem 1rem; }
.form-grid .field { margin-bottom: .8rem; }

/* Table row actions */
.row-actions { display: flex; gap: .8rem; align-items: center; white-space: nowrap; }
.row-actions form { display: inline; }
.link-danger { background: none; border: none; color: var(--danger); cursor: pointer; font: inherit; font-weight: 600; padding: 0; }
.link-back { display: inline-block; margin-bottom: .8rem; font-weight: 600; }
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: .5rem; }

/* Pager */
.pager { display: flex; align-items: center; justify-content: center; gap: 1rem; margin-top: 1rem; }
.pager a { font-weight: 600; }
.pager-info { color: var(--text-muted); font-size: .9rem; }

/* Progress bars */
.progress-bar { background: #e8edf5; border-radius: var(--radius-pill); height: 8px; overflow: hidden; }
.progress-bar span { display: block; height: 100%; background: var(--gradient); border-radius: var(--radius-pill); }
.progress-bar.big { height: 10px; }

.planner-toolbar {
  display: flex; align-items: center; justify-content: flex-end; gap: .45rem;
  margin-bottom: .85rem; flex-wrap: wrap;
}

/* Content hub grid (admin topic content + batch manage) */
.content-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1rem; align-items: start; }
.content-grid-span { grid-column: 1 / -1; }
.mcq-topic-panel { border: 2px solid var(--primary-soft); }
.mcq-topic-list .content-row span { display: flex; flex-direction: column; gap: .15rem; flex: 1; min-width: 0; }
.mcq-inline-form { margin-top: .5rem; padding-top: .8rem; border-top: 1px solid var(--border); }
.mcq-practice-card { display: flex; align-items: center; gap: .75rem; margin-bottom: 1rem; text-decoration: none; color: inherit; }
.mcq-practice-card:hover { border-color: var(--primary); }
.content-grid h3 { margin-bottom: .6rem; }
.content-list { list-style: none; display: grid; gap: .4rem; margin-bottom: .8rem; }
.content-row { display: flex; align-items: center; justify-content: space-between; gap: .6rem; padding: .45rem .6rem; background: var(--surface-2); border-radius: 10px; font-size: .9rem; }
.content-row form { display: inline; }
.mini-form { display: grid; gap: .5rem; }
.mini-form input, .mini-form select, .mini-form textarea { width: 100%; padding: .55rem .7rem; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--surface); color: var(--text); font: inherit; }
.inline-fields { display: flex; gap: .5rem; width: 100%; min-width: 0; }
.inline-fields select { flex: 1; min-width: 0; }
.inline-fields input { min-width: 0; }
.inline-fields .btn { flex: none; }

/* Plan builder day cards */
.day-card { margin-bottom: 1rem; }
.day-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: .6rem; }
.inline-task-form { grid-template-columns: 1fr 1fr 1.4fr auto auto; gap: .5rem; align-items: center; }
@media (max-width: 760px) { .inline-task-form { grid-template-columns: 1fr 1fr; } }

/* Learn surfaces */
.learn-list { display: grid; gap: .55rem; }
.learn-item { display: flex; align-items: center; justify-content: space-between; gap: .8rem; color: var(--text); }
.learn-title { font-weight: 600; color: var(--text); }
.chevron { font-size: 1.4rem; color: var(--text-muted); }
.lesson-note { margin-top: 1rem; }
.note-body { margin-top: .6rem; line-height: 1.7; }
.note-body p { margin-bottom: .7rem; }
.lesson-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: .7rem; margin-top: 1rem; }
.lesson-card { display: flex; align-items: center; gap: .7rem; }
.lesson-ico { font-size: 1.5rem; }
.lesson-kind { font-size: .72rem; text-transform: uppercase; letter-spacing: .03em; }
.lesson-title { font-weight: 600; font-size: .92rem; }
.lesson-card .btn { margin-left: auto; }

/* =====================================================================
   SVG ICONS (inline, stroke-based, inherit currentColor)
   ===================================================================== */
.icon { vertical-align: -0.18em; flex: none; }
.h-ico { display: flex; align-items: center; gap: .45rem; }
.h-ico .icon { color: var(--primary); }
.nav-ico { display: inline-flex; width: 22px; justify-content: center; }
.kpi-ico { display: inline-flex; color: var(--primary); }
.quick-ico { display: inline-flex; color: var(--primary); }
.lesson-ico { display: inline-flex; color: var(--primary); }
.stat-flame { display: flex; align-items: center; gap: .25rem; justify-content: center; }
.stat-flame .icon { color: var(--peach-icon); }
.admin-logout { display: flex; align-items: center; gap: .4rem; }
.menu-toggle { line-height: 0; }
.btn .icon { vertical-align: -0.22em; }

/* =====================================================================
   TEST ENGINE — runner, timer, result review
   ===================================================================== */
.test-topbar {
  position: sticky; top: .5rem; z-index: 40;
  display: flex; align-items: center; justify-content: space-between;
  padding: .7rem 1rem; margin-bottom: 1rem;
}
.test-timer { display: inline-flex; align-items: center; gap: .35rem; font-weight: 700; color: var(--danger); }

.q-card { margin-bottom: .8rem; border: 1px solid var(--border); }
.q-head { font-weight: 700; padding: 0 .3rem; }
.q-text { margin: .4rem 0 .7rem; font-weight: 600; }
.q-options { display: grid; gap: .45rem; }
.q-option {
  display: flex; align-items: center; gap: .6rem; cursor: pointer;
  padding: .55rem .7rem; border: 1px solid var(--border); border-radius: var(--radius-sm);
  transition: border-color .15s, background .15s;
}
.q-option:hover { border-color: var(--primary); }
.q-option input { accent-color: var(--primary); }
.q-option input:checked ~ span { font-weight: 600; }
.opt-label {
  flex: none; width: 26px; height: 26px; border-radius: 50%;
  display: grid; place-items: center; font-size: .8rem; font-weight: 700;
  background: var(--surface-2); border: 1px solid var(--border);
}
.q-option.static { cursor: default; }
.q-option.is-correct { border-color: var(--success); background: rgba(5,150,105,.07); }
.q-option.is-correct .opt-label { background: var(--success); border-color: var(--success); color: #fff; }
.q-option.is-wrong { border-color: var(--danger); background: rgba(220,38,38,.06); }
.q-option.is-wrong .opt-label { background: var(--danger); border-color: var(--danger); color: #fff; }
.opt-mark { margin-left: auto; display: inline-flex; }
.is-correct .opt-mark { color: var(--success); }
.is-wrong .opt-mark { color: var(--danger); }
.explanation {
  margin-top: .7rem; padding: .6rem .8rem; border-radius: var(--radius-sm);
  background: var(--surface-2); font-size: .9rem; border-left: 3px solid var(--info);
}
.result-card { text-align: center; padding: 1.6rem 1rem; }
.result-score { font-size: 2.6rem; font-weight: 800; color: var(--primary); margin: .3rem 0 .7rem; }
.result-score .muted { font-size: 1.4rem; font-weight: 600; }

/* =====================================================================
   STUDENT SELF-PLAN — create wizard topic picker
   ===================================================================== */
.topic-picker {
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  max-height: 320px; overflow-y: auto; padding: .6rem .8rem; background: var(--surface);
}
.picker-toggle { display: flex; align-items: center; gap: .5rem; padding-bottom: .5rem; border-bottom: 1px solid var(--border); margin-bottom: .4rem; cursor: pointer; }
.picker-subject { font-weight: 700; margin: .6rem 0 .1rem; font-size: .9rem; }
.picker-chapter { font-size: .78rem; margin: .3rem 0 .15rem; text-transform: uppercase; letter-spacing: .03em; }
.picker-topic { display: flex; align-items: center; gap: .55rem; padding: .3rem .2rem; cursor: pointer; font-size: .92rem; width: 100%; }
.picker-topic input { accent-color: var(--primary); flex: none; }
.picker-topic small { margin-left: auto; flex: none; }
/* Guard picker controls from the global ".field input/span" form styling —
   the picker lives inside a .field wrapper, so checkboxes must stay small
   and text spans inline/full-size. */
.topic-picker input[type="checkbox"] {
  width: 18px; height: 18px; padding: 0; margin: 0; flex: none;
}
.topic-picker span, .topic-picker strong {
  display: inline; width: auto; margin: 0;
  font-size: inherit; font-weight: inherit; color: inherit;
}
.picker-topic > span { flex: 1; min-width: 0; }
.picker-toggle { width: 100%; }
.picker-toggle input { flex: none; }
.picker-toggle span { color: var(--text-muted); }

/* =====================================================================
   SUBSCRIPTION + ANNOUNCEMENTS
   ===================================================================== */
.sub-active { border-left: 4px solid var(--success); }
.plan-card { margin-bottom: .8rem; }
.plan-head { display: flex; align-items: baseline; justify-content: space-between; gap: .8rem; margin-bottom: .5rem; }
.plan-head h3 { font-size: 1.05rem; }
.plan-price { font-size: 1.15rem; font-weight: 800; color: var(--primary); white-space: nowrap; }
.plan-features { list-style: none; display: grid; gap: .3rem; margin: 0 0 .8rem; font-size: .92rem; }
.plan-features .icon { color: var(--success); }
.announce-card { border-left: 4px solid var(--primary); margin-bottom: .55rem; }

/* =====================================================================
   POMODORO FOCUS TIMER
   ===================================================================== */
.focus-cta {
  display: flex; align-items: center; gap: .9rem;
  margin-bottom: 1rem; padding: 1rem 1.1rem;
  color: inherit; transition: border-color .15s, box-shadow .15s;
}
.focus-cta:hover { border-color: var(--primary); box-shadow: var(--shadow-lg); }
.focus-cta-ico { color: var(--primary); display: inline-flex; }
.focus-cta-title { font-weight: 700; margin-bottom: .15rem; }
.focus-cta .icon:last-child { margin-left: auto; color: var(--text-muted); }

.task-focus-link {
  display: inline-flex; align-items: center; gap: .25rem;
  font-size: .78rem; font-weight: 700; margin-top: .35rem;
}

.task-actions {
  display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .4rem;
}
.task-action {
  display: inline-flex; align-items: center; gap: .25rem;
  font-size: .72rem; font-weight: 700; padding: .3rem .6rem;
  border-radius: var(--radius-pill); border: 1px solid var(--border);
  color: var(--text-muted); background: #fff;
}
.task-action:hover { border-color: var(--primary); color: var(--primary-dark); }
.task-action-primary {
  background: var(--primary-soft); border-color: rgba(99,102,241,.2); color: var(--primary-dark);
}
.task-action-test {
  background: #ecfdf5; border-color: rgba(5,150,105,.25); color: #047857;
}
.task-action-test:hover { border-color: #059669; color: #065f46; }

.revision-due { border-color: var(--warning); box-shadow: 0 0 0 1px rgba(217,119,6,.15); }

/* Topbar actions + notifications */
.topbar-actions { display: flex; align-items: center; gap: .5rem; }
.notif-bell { position: relative; display: grid; place-items: center; color: var(--text-muted); padding: .35rem; }
.notif-bell:hover { color: var(--primary); }
.notif-badge {
  position: absolute; top: 0; right: 0; min-width: 16px; height: 16px; padding: 0 4px;
  border-radius: 999px; background: var(--danger); color: #fff; font-size: .65rem; font-weight: 800;
  display: grid; place-items: center;
}

/* Leaderboard */
.leaderboard-me { margin-bottom: 1rem; }
.leaderboard-me-row { display: flex; align-items: center; gap: 1rem; margin-top: .4rem; }
.leaderboard-rank-big { font-size: 2rem; font-weight: 800; color: var(--primary); }
.leaderboard-points { font-weight: 700; font-size: 1.1rem; }
.leaderboard-list { list-style: none; display: grid; gap: .5rem; padding: 0; }
.leaderboard-row { display: flex; align-items: center; gap: .8rem; padding: .75rem 1rem; }
.leaderboard-row.is-me { border-color: var(--primary); background: rgba(79,70,229,.06); }
.lb-pos { width: 28px; font-weight: 800; color: var(--text-muted); }
.lb-body { flex: 1; }
.lb-name { font-weight: 600; }
.lb-meta { font-size: .78rem; }
.lb-medal { color: var(--warning); }

/* Weak areas */
.weak-row { margin-bottom: .55rem; }
.weak-head { display: flex; justify-content: space-between; align-items: flex-start; gap: .5rem; }
.weak-title { font-weight: 700; }
.weak-badge { font-size: .75rem; font-weight: 700; color: var(--danger); background: #fef2f2; padding: .15rem .5rem; border-radius: 999px; }

/* Notifications inbox */
.notif-list { list-style: none; display: grid; gap: .5rem; padding: 0; }
.notif-item { padding: .85rem 1rem; }
.notif-item.is-unread { border-color: var(--primary); background: rgba(79,70,229,.04); }
.notif-link { display: block; color: inherit; }
.notif-title { font-weight: 600; }
.notif-body { font-size: .88rem; margin-top: .2rem; }
.notif-time { font-size: .75rem; margin-top: .35rem; }

/* Profile quick links */
.profile-links { display: grid; grid-template-columns: 1fr 1fr; gap: .5rem; padding: .8rem; }
.profile-links a {
  display: flex; align-items: center; gap: .45rem; padding: .6rem .7rem;
  border-radius: var(--radius-sm); border: 1px solid var(--border); font-weight: 600; font-size: .88rem; color: var(--text);
}
.profile-links a:hover { border-color: var(--primary); color: var(--primary); }

/* PDF in-app viewer -------------------------------------------------- */
.pdf-viewer-page .app-main.pdf-main { padding-bottom: 1.5rem; }
.pdf-toolbar {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: .6rem; margin-bottom: .8rem; padding: .75rem 1rem;
}
.pdf-toolbar-info { min-width: 0; }
.pdf-toolbar-info strong { display: block; font-size: .95rem; }
.pdf-toolbar-actions { display: flex; align-items: center; gap: .35rem; flex-wrap: wrap; }
.pdf-page-info { font-size: .82rem; font-weight: 700; min-width: 4.5rem; text-align: center; color: var(--text-muted); }
.pdf-status { padding: 1.2rem; text-align: center; margin-bottom: .8rem; }
.pdf-error { color: var(--danger); font-weight: 600; }
.pdf-embed-wrap { padding: 0; overflow: hidden; margin-bottom: .5rem; position: relative; min-height: 420px; }
.pdf-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  z-index: 1;
  pointer-events: none;
}
.pdf-embed-wrap.is-ready .pdf-loading { display: none; }
.pdf-embed {
  display: block;
  width: 100%;
  height: min(78vh, 820px);
  min-height: 420px;
  border: 0;
  background: #fff;
}
.pdf-hint { font-size: .82rem; text-align: center; margin-bottom: .5rem; }
.pdf-viewer-page.has-bottomnav .app-main { padding-bottom: calc(var(--nav-h) + var(--safe-bottom) + 24px); }
/* --- Flip-book stage (optional / legacy) ------------------------------- */
.book-stage {
  position: relative;
  perspective: 2400px;
  margin: 0 auto;
  max-width: 760px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  background: var(--surface);
  overflow: hidden;
}
.book-base { display: block; width: 100%; height: auto; }

/* The turning leaf sits exactly over the base page. */
.book-leaf {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
  transform-origin: left center;
  will-change: transform;
  z-index: 5;
}
.book-leaf.flip-anim { transition: transform .45s cubic-bezier(.4, .1, .3, 1); }
.leaf-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  overflow: hidden;
  background: #fff;
}
.leaf-front canvas { display: block; width: 100%; height: auto; }
/* Paper back of the turning sheet — a soft gradient reads as page thickness. */
.leaf-back {
  transform: rotateY(180deg);
  background: linear-gradient(105deg, #f6f7fb 0%, #e9ebf3 55%, #dfe2ec 100%);
}
.leaf-back::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(0,0,0,.08), transparent 18%);
}

/* Invisible edge tap zones with a soft chevron hint. */
.edge-zone {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 18%;
  min-width: 44px;                 /* comfortable touch target */
  border: none;
  background: transparent;
  cursor: pointer;
  z-index: 10;
  display: flex;
  align-items: center;
  padding: 0;
}
.edge-left  { left: 0; justify-content: flex-start; }
.edge-right { right: 0; justify-content: flex-end; }
.edge-hint {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--primary);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 34px;
  height: 34px;
  line-height: 1;
  display: grid;
  place-items: center;
  margin: 0 .4rem;
  opacity: .35;
  transition: opacity .2s, transform .1s;
}
.edge-zone:hover .edge-hint, .edge-zone:active .edge-hint { opacity: .95; }
.edge-zone:active .edge-hint { transform: scale(.92); }

/* Page slider */
.pdf-slider-row { max-width: 760px; margin: .8rem auto 0; padding: 0 .2rem; }
.pdf-slider-row input[type="range"] {
  width: 100%;
  accent-color: var(--primary);
  height: 28px;                    /* big thumb hit-area on phones */
  cursor: pointer;
  background: transparent;
}

.pdf-canvas-wrap {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: .5rem; box-shadow: var(--shadow-sm); overflow: auto;
}
.pdf-canvas-wrap canvas { display: block; margin: 0 auto; max-width: 100%; height: auto !important; }

/* Parent portal */
.parent-body .app-main { max-width: 900px; }
.parent-topbar { flex-wrap: wrap; gap: .5rem; }
.parent-topbar-actions { display: flex; align-items: center; gap: .6rem; }
.parent-grid { display: grid; gap: 1rem; }
@media (min-width: 640px) { .parent-grid { grid-template-columns: 1fr 1fr; } }
.parent-child-card { padding: 1.1rem; }
.parent-child-head h2 { font-size: 1.15rem; }

.inline-form { display: flex; align-items: center; gap: .35rem; flex-wrap: wrap; }

.focus-topic { margin-bottom: 1rem; }
.focus-topic-name { font-weight: 700; font-size: 1.05rem; }

.focus-timer-wrap { text-align: center; padding: 1.4rem 1rem 1.2rem; margin-bottom: 1rem; }
.focus-phase { font-weight: 700; font-size: 1.05rem; margin-bottom: 1rem; color: var(--primary); }
.focus-timer-wrap.is-break .focus-phase { color: var(--success); }
.focus-timer-wrap.is-running .focus-time { color: var(--primary); }

.focus-ring {
  position: relative; width: min(240px, 72vw); margin: 0 auto 1rem;
  aspect-ratio: 1;
}
.focus-ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.focus-ring-bg { fill: none; stroke: var(--border); stroke-width: 8; }
.focus-ring-fg {
  fill: none; stroke: var(--primary); stroke-width: 8; stroke-linecap: round;
  transition: stroke-dashoffset .35s linear, stroke .2s;
}
.focus-timer-wrap.is-break .focus-ring-fg { stroke: var(--success); }

.focus-time {
  position: absolute; inset: 0; display: grid; place-items: center;
  font-size: 2.6rem; font-weight: 800; letter-spacing: .02em;
}
.focus-meta { margin-bottom: .35rem; }
.focus-pomo-count {
  display: inline-flex; align-items: center; justify-content: center; gap: .3rem;
  font-size: .85rem; margin-bottom: 1.1rem;
}
.focus-controls {
  display: flex; align-items: center; justify-content: center; gap: .55rem; flex-wrap: wrap;
}
.focus-start-btn { min-width: 130px; }

.focus-guide h2 { font-size: 1rem; margin-bottom: .6rem; }
.focus-steps { padding-left: 1.2rem; font-size: .92rem; }
.focus-steps li { margin-bottom: .45rem; }

.checkbox-field {
  display: flex; align-items: center; gap: .55rem; cursor: pointer;
}
.checkbox-field input { width: auto; accent-color: var(--primary); }
.checkbox-field span { font-size: .9rem; font-weight: 500; color: var(--text); }

.h-ico { display: flex; align-items: center; gap: .4rem; }

/* Bookmarks & paywall */
.topic-head-row, .note-head-row { display: flex; align-items: flex-start; justify-content: space-between; gap: .6rem; }
.lesson-actions { display: flex; align-items: center; gap: .35rem; }
.btn-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border: 1px solid var(--border); border-radius: 10px;
  background: var(--surface); color: var(--muted); cursor: pointer; padding: 0;
}
.btn-icon.is-on { color: var(--primary); border-color: var(--primary-soft); background: var(--primary-bg); }
.learn-item.is-locked { opacity: .85; }
.lang-badge {
  font-size: .65rem; font-weight: 700; padding: .1rem .35rem; border-radius: 4px;
  background: var(--primary-bg); color: var(--primary); vertical-align: middle; margin-left: .25rem;
}
.paywall-card { text-align: center; padding: 2rem 1.2rem; }
.paywall-ico { color: var(--primary); margin-bottom: .6rem; }

/* Marketing landing ---------------------------------------------------- */
.landing-body { background: linear-gradient(180deg, #eef2ff 0%, #f8fafc 35%, #fff 100%); }
.landing-page { min-height: 100dvh; }

.landing-nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  max-width: 1040px; margin: 0 auto;
  padding: .75rem 1rem;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-soft);
}
.landing-brand {
  display: flex; align-items: center; gap: .55rem;
  font-weight: 800; font-size: 1.05rem; color: var(--text);
}
.landing-brand .logo-badge { margin: 0; }
.landing-brand-text { white-space: nowrap; }
.landing-menu-btn {
  display: none; width: 40px; height: 40px; border-radius: 10px;
  border: 1px solid var(--border); background: #fff; color: var(--text);
  place-items: center; cursor: pointer;
}
.landing-nav-links {
  display: flex; align-items: center; gap: .15rem; flex-wrap: wrap;
}
.landing-nav-links a:not(.btn) {
  padding: .45rem .75rem; border-radius: 999px;
  font-size: .88rem; font-weight: 600; color: var(--text-muted);
}
.landing-nav-links a:not(.btn):hover { color: var(--primary); background: var(--primary-soft); }
.landing-nav-login { margin-left: .35rem; }

.landing-wrap { max-width: 1040px; margin: 0 auto; padding: 0 1rem 3rem; }

.landing-hero {
  position: relative; text-align: center;
  padding: 2.5rem 0 2rem; overflow: hidden;
}
.landing-hero-bg { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.landing-blob {
  position: absolute; opacity: .45; filter: blur(2px);
}
.landing-blob--1 { width: 280px; top: -40px; left: -60px; }
.landing-blob--2 { width: 240px; bottom: -30px; right: -50px; }
.landing-hero-inner { position: relative; z-index: 1; max-width: 640px; margin: 0 auto; }
.landing-eyebrow {
  display: inline-flex; align-items: center; gap: .35rem;
  font-size: .82rem; font-weight: 700; color: var(--primary);
  background: var(--primary-soft); padding: .35rem .85rem; border-radius: 999px;
  margin-bottom: .85rem;
}
.landing-title { font-size: clamp(1.65rem, 4.5vw, 2.35rem); line-height: 1.15; margin-bottom: .65rem; }
.landing-tagline { font-size: 1.1rem; font-weight: 600; margin: .5rem 0; color: var(--primary); }
.landing-sub { max-width: 560px; margin: 0 auto 1.35rem; font-size: .98rem; line-height: 1.55; }
.landing-cta { display: flex; gap: .65rem; justify-content: center; flex-wrap: wrap; }
.landing-cta .btn { display: inline-flex; align-items: center; gap: .4rem; }

.landing-section { margin-top: 2.75rem; scroll-margin-top: 4.5rem; }
.landing-section-head { text-align: center; margin-bottom: 1.1rem; }
.landing-kicker {
  display: inline-flex; align-items: center; gap: .35rem;
  font-size: .78rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .06em; color: var(--primary); margin-bottom: .4rem;
}
.landing-h2 { font-size: clamp(1.2rem, 3vw, 1.55rem); margin-bottom: .35rem; }
.landing-lead { max-width: 520px; margin: 0 auto; font-size: .92rem; }

.landing-about { padding: 1.25rem; }
.landing-about-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; align-items: center;
}
.landing-about-copy p { font-size: .95rem; line-height: 1.6; margin-bottom: .75rem; }
.landing-about-copy p:last-child { margin-bottom: 0; }
.landing-about-stats { margin: 0; }

.landing-flow { padding: 1rem; overflow-x: auto; }
.landing-flow-track {
  display: flex; align-items: flex-start; gap: .25rem;
  min-width: min-content; padding: .25rem .15rem;
}
.landing-flow-step {
  flex: 0 0 auto; width: 96px; text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: .25rem;
  font-size: .72rem; line-height: 1.3;
}
.landing-flow-step strong { font-size: .78rem; color: var(--text); }
.landing-flow-icon {
  width: 44px; height: 44px; border-radius: 12px;
  display: grid; place-items: center;
  background: var(--gradient); color: #fff;
  box-shadow: 0 4px 12px rgba(99, 102, 241, .25);
  margin-bottom: .15rem;
}
.landing-flow-arrow {
  flex: 0 0 auto; color: var(--text-muted); opacity: .5;
  display: grid; place-items: center; padding-top: .65rem;
}

.landing-features { margin-top: 1rem; }
.landing-feature-title { font-size: .92rem; display: block; margin-bottom: .1rem; }
.info-tile strong.landing-feature-title { color: var(--text); }

.landing-connect-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: .75rem;
}
.landing-connect-card {
  text-decoration: none; color: inherit;
  transition: transform .15s, box-shadow .15s;
}
.landing-connect-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.landing-connect-host {
  display: inline-flex; align-items: center; gap: .25rem;
  font-size: .78rem; font-weight: 700; color: var(--primary);
}

.banner-strip { display: grid; gap: .6rem; }
.banner-card img { width: 100%; border-radius: var(--radius); display: block; }
.testimonial-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: .75rem; }
.testimonial-card { padding: 1rem; }
.testimonial-msg { font-size: .95rem; margin-bottom: .6rem; }
.testimonial-stars { color: #f59e0b; margin-left: .35rem; }
.faq-list { display: grid; gap: .5rem; max-width: 720px; margin: 0 auto; }
.faq-item summary { cursor: pointer; font-weight: 600; padding: .2rem 0; }
.faq-item p { margin-top: .5rem; font-size: .9rem; }

.landing-footer {
  text-align: center; margin-top: 3rem; padding-top: 1.5rem;
  border-top: 1px solid var(--border-soft);
}
.landing-footer-brand {
  display: flex; flex-direction: column; align-items: center; gap: .5rem;
  font-weight: 700; margin-bottom: .85rem;
}
.landing-footer-brand .logo-badge { margin: 0; }
.landing-footer-links {
  display: flex; flex-wrap: wrap; justify-content: center; gap: .5rem 1rem;
  margin-bottom: .75rem; font-size: .88rem; font-weight: 600;
}
.landing-footer-links a { color: var(--text-muted); }
.landing-footer-links a:hover { color: var(--primary); }
.landing-footer-copy { font-size: .8rem; }

@media (max-width: 768px) {
  .landing-menu-btn { display: grid; }
  .landing-nav-links {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: .15rem;
    padding: .75rem 1rem 1rem; background: rgba(255, 255, 255, .97);
    border-bottom: 1px solid var(--border-soft);
    box-shadow: var(--shadow-md);
  }
  .landing-nav-links.is-open { display: flex; }
  .landing-nav-links a:not(.btn) { padding: .65rem .85rem; border-radius: var(--radius-sm); }
  .landing-nav-login { margin-left: 0; width: 100%; justify-content: center; }
  .landing-nav { position: sticky; flex-wrap: wrap; }
  .landing-about-grid { grid-template-columns: 1fr; }
  .landing-connect-grid { grid-template-columns: 1fr; }
  .landing-features { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 900px) {
  .landing-features { grid-template-columns: repeat(4, 1fr); }
}

/* MCQ bulk upload */
.mcq-tabs {
  display: flex; gap: .35rem; margin-bottom: 1rem; flex-wrap: wrap;
}
.mcq-tabs a {
  padding: .45rem .9rem; border-radius: 999px; font-size: .88rem; font-weight: 600;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
}
.mcq-tabs a.is-active { background: var(--gradient); color: #fff; border-color: transparent; }
.mcq-bulk-grid {
  display: grid; grid-template-columns: 1fr 340px; gap: 1rem; align-items: start;
}
@media (max-width: 900px) { .mcq-bulk-grid { grid-template-columns: 1fr; } }
.mcq-bulk-textarea { font-family: ui-monospace, Consolas, monospace; font-size: .85rem; }
.mcq-format-sample {
  font-size: .75rem; line-height: 1.45; white-space: pre-wrap; margin: 0;
  background: var(--surface-2); padding: .75rem; border-radius: var(--radius-sm);
  color: var(--text);
}
.mcq-preview-list { display: grid; gap: .6rem; max-height: 420px; overflow-y: auto; margin-top: .6rem; }
.mcq-preview-item { padding: .75rem; }
.mcq-preview-q { margin-bottom: .4rem; font-size: .92rem; }
.mcq-preview-opts { list-style: none; padding: 0; margin: 0; font-size: .88rem; }
.mcq-preview-opts li { padding: .15rem 0; }
.mcq-preview-opts li.is-correct { color: var(--success); font-weight: 600; }

.topic-mcq-count { font-variant-numeric: tabular-nums; }