/* ADS V2.2 — UI overhaul */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background: var(--page);
  color: var(--slate-950);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body.modal-open { overflow: hidden; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
svg { display: block; }
.hidden { display: none !important; }

/* Boot */
.boot-screen {
  min-height: 100vh;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 18px;
  padding: 24px;
  background:
    radial-gradient(circle at 50% 8%, rgba(47, 111, 236, .13), transparent 30%),
    linear-gradient(180deg, #f8fbff, #f3f6fb 65%, #fff);
  color: var(--slate-600);
  text-align: center;
}
.boot-logo {
  width: 84px;
  height: 84px;
  object-fit: contain;
  filter: drop-shadow(0 14px 26px rgba(13, 32, 59, .14));
}
.boot-screen p { margin: 0; font-size: 14px; }
.boot-spinner, .spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--slate-200);
  border-top-color: var(--blue-600);
  border-radius: 50%;
  animation: spin .78s linear infinite;
}
@keyframes spin { to { transform: rotate(1turn); } }

/* Main shell */
.app-shell { min-height: 100vh; }
.sidebar {
  position: fixed;
  inset: 0 0 0 auto;
  z-index: 50;
  width: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  padding: 18px 14px;
  overflow-y: auto;
  background: rgba(255, 255, 255, .97);
  border-left: 1px solid var(--border);
  box-shadow: -8px 0 30px rgba(16, 24, 40, .025);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 66px;
  padding: 8px 10px 17px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.brand-logo {
  width: 46px;
  height: 46px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: 15px;
  background: linear-gradient(145deg, var(--navy-900), var(--blue-700));
  box-shadow: 0 10px 22px rgba(31, 86, 195, .2);
}
.brand-logo img { width: 38px; height: 38px; object-fit: contain; }
.brand-copy { min-width: 0; }
.brand-copy strong {
  display: block;
  overflow: hidden;
  color: var(--slate-900);
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.brand-copy small {
  display: block;
  margin-top: 4px;
  color: var(--slate-500);
  font-size: 10.5px;
}
.workspace-badge {
  margin-inline-start: auto;
  flex: none;
  padding: 4px 7px;
  border-radius: var(--radius-pill);
  background: var(--blue-50);
  color: var(--blue-700);
  font-size: 9px;
  font-weight: 700;
}
.side-nav { display: grid; gap: 3px; }
.side-section {
  margin: 19px 12px 7px;
  color: var(--slate-400);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .25px;
}
.nav-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 11px;
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: 12px;
  background: transparent;
  color: var(--slate-600);
  font-size: 13.5px;
  font-weight: 500;
  text-align: right;
  cursor: pointer;
  transition: color var(--ease), background var(--ease), border-color var(--ease), transform var(--ease);
}
.nav-item:hover {
  color: var(--slate-900);
  background: var(--slate-50);
  border-color: var(--border);
}
.nav-item.active {
  color: var(--blue-700);
  background: linear-gradient(135deg, var(--blue-50), #f7faff);
  border-color: #d8e6ff;
  font-weight: 700;
}
.nav-item.active::after {
  content: '';
  position: absolute;
  inset-block: 9px;
  left: -14px;
  width: 3px;
  border-radius: 0 999px 999px 0;
  background: var(--blue-600);
}
.nav-item svg { width: 18px; height: 18px; flex: none; }
.nav-item span { min-width: 0; overflow: hidden; text-overflow: ellipsis; }
.sidebar-footer { margin-top: auto; padding-top: 20px; }
.user-mini {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: linear-gradient(180deg, #fff, var(--surface-muted));
}
.avatar {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: none;
  border-radius: 12px;
  background: linear-gradient(145deg, var(--navy-800), var(--blue-600));
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  box-shadow: 0 8px 18px rgba(47, 111, 236, .18);
}
.user-mini-copy { min-width: 0; }
.user-mini strong {
  display: block;
  overflow: hidden;
  color: var(--slate-900);
  font-size: 12.5px;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.user-mini small { display: block; margin-top: 3px; color: var(--slate-500); font-size: 10.5px; }
.logout-item { margin-top: 7px; color: var(--red-700); }
.logout-item:hover { color: var(--red-700); background: var(--red-50); border-color: var(--red-100); }

.main-wrap { min-height: 100vh; margin-right: var(--sidebar-width); }
.topbar {
  position: sticky;
  top: 0;
  z-index: 35;
  min-height: var(--topbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 12px 30px;
  background: rgba(246, 248, 252, .88);
  border-bottom: 1px solid rgba(229, 234, 241, .88);
  backdrop-filter: blur(18px);
}
.topbar-start, .topbar-actions, .topbar-user { display: flex; align-items: center; }
.topbar-start { min-width: 0; gap: 12px; }
.topbar-title { min-width: 0; }
.topbar-title h1 {
  margin: 0;
  overflow: hidden;
  color: var(--slate-900);
  font-size: 16px;
  font-weight: 700;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.topbar-title p {
  margin: 3px 0 0;
  overflow: hidden;
  color: var(--slate-500);
  font-size: 11px;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.topbar-actions { gap: 9px; }
.topbar-user {
  gap: 9px;
  min-height: 42px;
  padding: 5px 8px 5px 12px;
  border: 1px solid var(--border);
  border-radius: 13px;
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}
.topbar-user .avatar { width: 31px; height: 31px; border-radius: 10px; font-size: 10px; box-shadow: none; }
.topbar-user strong { display: block; max-width: 130px; overflow: hidden; color: var(--slate-800); font-size: 11.5px; white-space: nowrap; text-overflow: ellipsis; }
.topbar-user small { display: block; margin-top: 1px; color: var(--slate-500); font-size: 9.5px; }
.environment-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 10px;
  border: 1px solid #d6e4ff;
  border-radius: var(--radius-pill);
  background: var(--blue-50);
  color: var(--blue-700);
  font-size: 10px;
  font-weight: 700;
}
.environment-pill::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--blue-600); box-shadow: 0 0 0 4px rgba(47, 111, 236, .1); }
.icon-btn {
  width: 42px;
  height: 42px;
  flex: none;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 13px;
  background: var(--surface);
  color: var(--slate-600);
  box-shadow: var(--shadow-xs);
  cursor: pointer;
  transition: transform var(--ease), color var(--ease), border-color var(--ease), box-shadow var(--ease);
}
.icon-btn:hover { transform: translateY(-1px); color: var(--blue-700); border-color: var(--blue-200); box-shadow: var(--shadow-sm); }
.icon-btn svg { width: 18px; height: 18px; }
.mobile-menu { display: none; }

.page {
  width: min(100%, var(--content-max));
  margin: 0 auto;
  padding: 30px 30px 52px;
}
.page > * + * { margin-top: 18px; }
.page-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 0;
}
.page-head-copy { min-width: 0; }
.page-kicker {
  display: inline-flex;
  margin-bottom: 7px;
  color: var(--blue-700);
  font-size: 10px;
  font-weight: 700;
}
.page-head h2 { margin: 0; color: var(--slate-900); font-size: clamp(22px, 2vw, 28px); line-height: 1.25; letter-spacing: -.35px; }
.page-head p { max-width: 760px; margin: 7px 0 0; color: var(--slate-500); font-size: 13px; line-height: 1.7; }
.page-actions { display: flex; align-items: center; gap: 9px; flex-wrap: wrap; }

/* Buttons */
.btn {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 15px;
  border: 1px solid transparent;
  border-radius: 11px;
  font-size: 12.5px;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease), background var(--ease), color var(--ease);
}
.btn svg { width: 17px; height: 17px; }
.btn:hover:not(:disabled) { transform: translateY(-1px); }
.btn:disabled { opacity: .48; cursor: not-allowed; }
.btn-primary { background: linear-gradient(135deg, var(--blue-600), var(--blue-700)); color: #fff; box-shadow: 0 9px 20px rgba(47, 111, 236, .22); }
.btn-primary:hover:not(:disabled) { box-shadow: 0 13px 25px rgba(47, 111, 236, .28); }
.btn-secondary { border-color: var(--border-strong); background: #fff; color: var(--slate-700); box-shadow: var(--shadow-xs); }
.btn-secondary:hover:not(:disabled) { border-color: var(--blue-200); color: var(--blue-700); box-shadow: var(--shadow-sm); }
.btn-danger { border-color: var(--red-100); background: var(--red-50); color: var(--red-700); }
.btn-sm { min-height: 34px; padding: 7px 11px; border-radius: 9px; font-size: 11px; }
.link-btn { border: 0; background: transparent; color: var(--blue-700); font-size: 11.5px; font-weight: 700; cursor: pointer; }

/* Layout primitives */
.grid { display: grid; gap: 18px; }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xs);
}
.card-pad { padding: 21px; }
.card:hover { border-color: #dde4ee; }

/* Stats */
.stat-card {
  position: relative;
  min-height: 132px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 19px;
  overflow: hidden;
}
.stat-card::after {
  content: '';
  position: absolute;
  left: -42px;
  bottom: -56px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47, 111, 236, .07), transparent 70%);
}
.stat-label { color: var(--slate-500); font-size: 11.5px; font-weight: 600; }
.stat-value { margin: 13px 0 8px; color: var(--slate-900); font-size: clamp(25px, 2.4vw, 31px); font-weight: 700; line-height: 1; letter-spacing: -.7px; }
.stat-meta { max-width: 190px; color: var(--slate-500); font-size: 10.5px; line-height: 1.55; }
.stat-icon {
  width: 44px;
  height: 44px;
  flex: none;
  display: grid;
  place-items: center;
  border: 1px solid #dce8ff;
  border-radius: 14px;
  background: var(--blue-50);
  color: var(--blue-700);
}
.stat-icon.green { border-color: #ccefdc; background: var(--green-50); color: var(--green-700); }
.stat-icon.amber { border-color: #f9e0ab; background: var(--amber-50); color: var(--amber-700); }
.stat-icon.slate { border-color: var(--slate-200); background: var(--slate-50); color: var(--slate-600); }
.stat-icon svg { width: 21px; height: 21px; }

/* Hero */
.hero-card {
  position: relative;
  min-height: 274px;
  padding: clamp(24px, 3vw, 34px);
  overflow: hidden;
  background:
    radial-gradient(circle at 12% 14%, rgba(104, 155, 255, .34), transparent 26%),
    linear-gradient(135deg, var(--navy-950), var(--navy-800) 56%, var(--blue-700));
  border-color: transparent;
  color: #fff;
  box-shadow: 0 22px 44px rgba(13, 32, 59, .16);
}
.hero-card::before, .hero-card::after { content: ''; position: absolute; border-radius: 50%; pointer-events: none; }
.hero-card::before { width: 420px; height: 420px; left: -170px; top: -250px; border: 1px solid rgba(255, 255, 255, .13); box-shadow: 0 0 0 54px rgba(255, 255, 255, .035), 0 0 0 108px rgba(255, 255, 255, .02); }
.hero-card::after { width: 180px; height: 180px; right: -70px; bottom: -80px; background: rgba(255, 255, 255, .045); }
.hero-card > * { position: relative; z-index: 1; }
.hero-card h2 { max-width: 850px; margin: 16px 0 9px; color: #fff; font-size: clamp(25px, 3vw, 36px); line-height: 1.35; letter-spacing: -.7px; }
.hero-card p { max-width: 760px; margin: 0 0 24px; color: #cbd9ee; font-size: 13.5px; line-height: 1.85; }
.hero-progress { max-width: 660px; display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 14px; }
.progress-track { height: 9px; overflow: hidden; border-radius: var(--radius-pill); background: rgba(255, 255, 255, .16); }
.progress-fill { height: 100%; border-radius: inherit; background: linear-gradient(90deg, #75a8ff, #fff); transition: width .4s ease; }
.progress-number { min-width: 42px; color: #fff; font-size: 13px; font-weight: 700; text-align: left; }
.hero-actions { display: flex; align-items: center; gap: 9px; margin-top: 23px; flex-wrap: wrap; }
.hero-card .btn-secondary { border-color: rgba(255, 255, 255, .17); background: rgba(255, 255, 255, .09); color: #fff; box-shadow: none; }
.hero-card .btn-secondary:hover { border-color: rgba(255, 255, 255, .28); background: rgba(255, 255, 255, .14); color: #fff; }
.hero-card .badge-blue { background: rgba(255, 255, 255, .12); color: #fff; border-color: rgba(255, 255, 255, .14); }

/* Sections */
.section-card { padding: 20px; }
.section-title {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 17px;
}
.section-title h3 { margin: 0; color: var(--slate-900); font-size: 15px; line-height: 1.35; }
.section-title p { margin: 5px 0 0; color: var(--slate-500); font-size: 10.5px; line-height: 1.55; }
.lesson-list, .quick-list { display: grid; gap: 9px; }
.lesson-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  min-height: 64px;
  padding: 11px 12px;
  border: 1px solid var(--border);
  border-radius: 13px;
  background: #fff;
  cursor: pointer;
  transition: transform var(--ease), border-color var(--ease), background var(--ease), box-shadow var(--ease);
}
.lesson-row:hover { transform: translateY(-1px); border-color: var(--blue-200); background: #fbfdff; box-shadow: var(--shadow-sm); }
.lesson-row.locked { opacity: .62; cursor: not-allowed; }
.lesson-row.locked:hover { transform: none; border-color: var(--border); box-shadow: none; }
.lesson-index {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--slate-200);
  border-radius: 12px;
  background: var(--slate-50);
  color: var(--slate-600);
  font-size: 11px;
  font-weight: 700;
}
.lesson-index svg { width: 16px; height: 16px; }
.lesson-row.done .lesson-index { border-color: #c8ebd8; background: var(--green-50); color: var(--green-700); }
.lesson-title { overflow: hidden; color: var(--slate-800); font-size: 12.5px; font-weight: 700; white-space: nowrap; text-overflow: ellipsis; }
.lesson-desc { margin-top: 4px; overflow: hidden; color: var(--slate-500); font-size: 10.5px; white-space: nowrap; text-overflow: ellipsis; }
.lesson-status { color: var(--slate-500); font-size: 10.5px; white-space: nowrap; }
.lesson-status svg { width: 17px; height: 17px; }
.quick-item {
  min-height: 62px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 13px;
  padding: 12px 13px;
  border: 1px solid transparent;
  border-radius: 13px;
  background: var(--surface-muted);
}
.quick-item:hover { border-color: var(--border); background: #fff; }
.quick-item strong { color: var(--slate-800); font-size: 12px; }
.quick-item small { display: block; margin-top: 4px; color: var(--slate-500); font-size: 10px; line-height: 1.5; }

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  min-height: 25px;
  padding: 4px 9px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-size: 9.5px;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
}
.badge-blue { border-color: #d3e2ff; background: var(--blue-50); color: var(--blue-700); }
.badge-green { border-color: #ccefdc; background: var(--green-50); color: var(--green-700); }
.badge-amber { border-color: #f5dfb2; background: var(--amber-50); color: var(--amber-700); }
.badge-red { border-color: #f7cece; background: var(--red-50); color: var(--red-700); }
.badge-slate { border-color: var(--slate-200); background: var(--slate-50); color: var(--slate-600); }

/* Tables */
.table-card { overflow: hidden; }
.table-toolbar {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, #fff, #fcfdff);
}
.search-box { position: relative; width: min(360px, 100%); }
.search-box > span, .search-box > svg { position: absolute; right: 13px; top: 50%; transform: translateY(-50%); color: var(--slate-400); pointer-events: none; }
.search-box svg { width: 17px; height: 17px; }
.search-box input { width: 100%; min-height: 42px; padding: 9px 40px 9px 12px; border: 1px solid var(--border); border-radius: 11px; background: var(--slate-50); color: var(--slate-800); outline: none; }
.search-box input:focus { border-color: var(--blue-200); background: #fff; box-shadow: 0 0 0 4px rgba(47, 111, 236, .09); }
.table-wrap { overflow: auto; scrollbar-width: thin; }
.data-table { width: 100%; min-width: 880px; border-collapse: separate; border-spacing: 0; }
.data-table th, .data-table td { padding: 13px 15px; border-bottom: 1px solid var(--border); text-align: right; vertical-align: middle; font-size: 11.5px; }
.data-table th { position: sticky; top: 0; z-index: 1; background: var(--slate-50); color: var(--slate-500); font-size: 10.5px; font-weight: 700; white-space: nowrap; }
.data-table tbody tr { background: #fff; transition: background var(--ease); }
.data-table tbody tr:hover { background: #fbfdff; }
.data-table tbody tr:last-child td { border-bottom: 0; }
.person-cell { min-width: 0; display: flex; align-items: center; gap: 10px; }
.person-cell .avatar { width: 34px; height: 34px; border-radius: 11px; font-size: 10px; box-shadow: none; }
.person-cell strong { display: block; max-width: 190px; overflow: hidden; color: var(--slate-800); font-size: 11.5px; white-space: nowrap; text-overflow: ellipsis; }
.person-cell small { display: block; max-width: 220px; margin-top: 3px; overflow: hidden; color: var(--slate-500); font-size: 9.5px; white-space: nowrap; text-overflow: ellipsis; }

/* Forms */
.form-group { display: grid; gap: 7px; }
.form-group label { color: var(--slate-700); font-size: 11.5px; font-weight: 700; }
.input {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 11px;
  background: #fff;
  color: var(--slate-800);
  outline: none;
  transition: border-color var(--ease), box-shadow var(--ease), background var(--ease);
}
.input::placeholder { color: var(--slate-400); }
.input:focus { border-color: var(--blue-200); box-shadow: 0 0 0 4px rgba(47, 111, 236, .09); }
.form-error { padding: 10px 12px; border: 1px solid var(--red-100); border-radius: 10px; background: var(--red-50); color: var(--red-700); font-size: 11px; line-height: 1.6; }

/* Authentication */
.auth-page { min-height: 100vh; display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(420px, .88fr); background: #fff; }
.auth-visual {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(36px, 5vw, 70px);
  overflow: hidden;
  background:
    radial-gradient(circle at 8% 8%, rgba(104, 155, 255, .35), transparent 24%),
    linear-gradient(145deg, var(--navy-950), var(--navy-800) 64%, var(--blue-700));
  color: #fff;
}
.auth-visual::before, .auth-visual::after { content: ''; position: absolute; border-radius: 50%; }
.auth-visual::before { width: 570px; height: 570px; left: -250px; bottom: -310px; border: 1px solid rgba(255, 255, 255, .13); box-shadow: 0 0 0 70px rgba(255, 255, 255, .035), 0 0 0 140px rgba(255, 255, 255, .02); }
.auth-visual::after { width: 260px; height: 260px; right: -100px; top: 18%; background: rgba(255, 255, 255, .035); }
.auth-brand, .auth-copy, .auth-version { position: relative; z-index: 1; }
.auth-brand { display: flex; align-items: center; gap: 13px; }
.auth-brand img { width: 58px; height: 58px; object-fit: contain; filter: drop-shadow(0 10px 20px rgba(0, 0, 0, .15)); }
.auth-brand strong { display: block; font-size: 17px; }
.auth-brand small { display: block; margin-top: 4px; color: #9fb3cf; font-size: 10.5px; }
.auth-copy { max-width: 610px; }
.auth-copy h1 { margin: 18px 0 14px; font-size: clamp(34px, 4.2vw, 52px); line-height: 1.3; letter-spacing: -1.2px; }
.auth-copy p { max-width: 570px; margin: 0; color: #c8d6e9; font-size: 14px; line-height: 1.95; }
.auth-points { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 27px; }
.auth-point { min-height: 72px; display: flex; align-items: center; padding: 13px; border: 1px solid rgba(255, 255, 255, .1); border-radius: 14px; background: rgba(255, 255, 255, .07); color: #dce7f5; font-size: 10.5px; line-height: 1.6; backdrop-filter: blur(8px); }
.auth-version { color: #8ea6c6; font-size: 10px; }
.auth-form-wrap { display: grid; place-items: center; padding: 42px clamp(24px, 5vw, 70px); background: linear-gradient(180deg, #fff, #fbfcff); }
.auth-card { width: min(430px, 100%); }
.auth-card h2 { margin: 11px 0 7px; color: var(--slate-900); font-size: 29px; }
.auth-card > p { margin: 0 0 26px; color: var(--slate-500); font-size: 12.5px; }
.auth-form { display: grid; gap: 15px; }
.password-wrap { position: relative; }
.password-wrap .input { padding-left: 48px; }
.password-toggle { position: absolute; left: 7px; top: 50%; width: 36px; height: 36px; display: grid; place-items: center; padding: 0; border: 0; transform: translateY(-50%); background: transparent; color: var(--slate-500); cursor: pointer; }
.password-toggle svg { width: 17px; height: 17px; }
.auth-links { display: flex; align-items: center; justify-content: space-between; gap: 12px; color: var(--slate-500); font-size: 10.5px; }
.auth-links a { color: var(--blue-700); font-weight: 700; }
.auth-foot { margin-top: 24px; color: var(--slate-500); font-size: 10.5px; text-align: center; }
.auth-foot a { color: var(--blue-700); font-weight: 700; }

/* Learning */
.learning-layout { display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: 18px; align-items: start; }
.video-card { overflow: hidden; border-radius: var(--radius-lg); }
.video-wrap { position: relative; aspect-ratio: 16 / 9; display: grid; place-items: center; overflow: hidden; background: #050d19; }
.video-wrap video, .video-wrap iframe { width: 100%; height: 100%; border: 0; }
.video-placeholder { max-width: 420px; padding: 24px; color: #9eb3cf; text-align: center; }
.video-placeholder svg { width: 52px; height: 52px; margin: 0 auto 12px; }
.video-info { padding: 21px; }
.video-info h2 { margin: 10px 0 8px; color: var(--slate-900); font-size: clamp(19px, 2vw, 24px); }
.video-info p { margin: 0; color: var(--slate-500); font-size: 12px; line-height: 1.8; }
.curriculum { position: sticky; top: calc(var(--topbar-height) + 18px); max-height: calc(100vh - var(--topbar-height) - 36px); overflow: auto; }
.module-block + .module-block { border-top: 1px solid var(--border); }
.module-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 13px 15px; background: var(--slate-50); color: var(--slate-700); font-size: 11px; font-weight: 700; }
.module-lessons { padding: 7px; }
.module-lesson { display: flex; align-items: flex-start; gap: 9px; padding: 10px; border-radius: 11px; color: var(--slate-600); cursor: pointer; transition: background var(--ease), color var(--ease); }
.module-lesson:hover, .module-lesson.active { background: var(--blue-50); color: var(--blue-700); }
.module-lesson.active { font-weight: 700; }
.module-lesson.locked { opacity: .52; cursor: not-allowed; }
.module-lesson svg { width: 16px; height: 16px; margin-top: 1px; flex: none; }
.module-lesson strong { display: block; color: inherit; font-size: 10.5px; line-height: 1.55; }
.module-lesson small { display: block; margin-top: 3px; color: var(--slate-500); font-size: 9px; }

/* States */
.empty-state { padding: 42px 22px; color: var(--slate-500); text-align: center; }
.empty-icon { width: 56px; height: 56px; display: grid; place-items: center; margin: 0 auto 14px; border: 1px solid var(--slate-200); border-radius: 18px; background: var(--slate-50); color: var(--slate-500); }
.empty-icon svg { width: 23px; height: 23px; }
.empty-state h3 { margin: 0 0 7px; color: var(--slate-800); font-size: 15px; }
.empty-state p { max-width: 470px; margin: 0 auto 16px; font-size: 11.5px; line-height: 1.75; }
.error-state { padding: 34px; text-align: center; }
.error-state h3 { margin: 10px 0 6px; color: var(--slate-800); }
.error-state p { max-width: 570px; margin: 0 auto 17px; color: var(--slate-500); font-size: 11.5px; line-height: 1.75; }
.skeleton { position: relative; overflow: hidden; border-radius: 13px; background: var(--slate-100); }
.skeleton::after { content: ''; position: absolute; inset: 0; transform: translateX(100%); background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .78), transparent); animation: shimmer 1.25s infinite; }
@keyframes shimmer { to { transform: translateX(-100%); } }
.skeleton-line { height: 13px; }
.skeleton-card { height: 132px; }

/* Drawer */
.drawer-overlay { position: fixed; inset: 0; z-index: 90; display: flex; justify-content: flex-start; background: rgba(8, 20, 38, .52); backdrop-filter: blur(3px); }
.drawer-panel { width: min(560px, 94vw); height: 100%; padding: 24px; overflow: auto; background: #fff; box-shadow: var(--shadow-lg); animation: drawerIn .22s ease; }
@keyframes drawerIn { from { transform: translateX(28px); opacity: .6; } }

/* Toast */
.toast-root { position: fixed; left: 22px; bottom: 22px; z-index: 120; display: grid; gap: 9px; }
.toast { min-width: 290px; max-width: 420px; display: flex; align-items: flex-start; gap: 10px; padding: 13px 15px; border-radius: 13px; background: var(--slate-950); color: #fff; box-shadow: var(--shadow-lg); font-size: 11.5px; line-height: 1.6; animation: toastIn .2s ease; }
.toast.success { background: #14613f; }
.toast.error { background: #8f2b2b; }
@keyframes toastIn { from { opacity: 0; transform: translateY(8px); } }

/* Mobile */
.sidebar-overlay { display: none; }
.bottom-nav { display: none; }

@media (max-width: 1250px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .learning-layout { grid-template-columns: minmax(0, 1fr) 320px; }
}

@media (max-width: 1020px) {
  :root { --topbar-height: 66px; }
  .sidebar { width: min(310px, 88vw); transform: translateX(105%); transition: transform .24s ease; box-shadow: var(--shadow-lg); }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay { position: fixed; inset: 0; z-index: 45; display: block; background: rgba(8, 20, 38, .48); opacity: 0; pointer-events: none; transition: opacity .2s ease; backdrop-filter: blur(2px); }
  .sidebar-overlay.open { opacity: 1; pointer-events: auto; }
  .main-wrap { margin-right: 0; }
  .mobile-menu { display: grid; }
  .topbar { padding: 10px 18px; }
  .environment-pill, .topbar-user-copy { display: none; }
  .topbar-user { width: 42px; height: 42px; padding: 5px; justify-content: center; }
  .page { padding: 24px 18px 102px; }
  .learning-layout { grid-template-columns: 1fr; }
  .curriculum { position: static; max-height: none; }
  .bottom-nav {
    position: fixed;
    right: 12px;
    left: 12px;
    bottom: max(10px, env(safe-area-inset-bottom));
    z-index: 40;
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    padding: 7px;
    border: 1px solid rgba(229, 234, 241, .96);
    border-radius: 18px;
    background: rgba(255, 255, 255, .94);
    box-shadow: 0 18px 44px rgba(16, 24, 40, .15);
    backdrop-filter: blur(18px);
  }
  .bottom-link { min-width: 0; display: grid; justify-items: center; gap: 4px; padding: 7px 2px; border-radius: 11px; color: var(--slate-500); font-size: 9px; }
  .bottom-link.active { background: var(--blue-50); color: var(--blue-700); font-weight: 700; }
  .bottom-link svg { width: 19px; height: 19px; }
  .auth-page { grid-template-columns: 1fr; }
  .auth-visual { display: none; }
  .auth-form-wrap { min-height: 100vh; padding: 28px 20px; }
}

@media (max-width: 720px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .page-head { align-items: stretch; flex-direction: column; gap: 14px; }
  .page-head h2 { font-size: 22px; }
  .page-actions { width: 100%; }
  .page-actions .btn { flex: 1 1 auto; }
  .hero-card { min-height: auto; padding: 23px; }
  .hero-card h2 { font-size: 24px; }
  .hero-progress { grid-template-columns: 1fr; gap: 8px; }
  .progress-number { text-align: right; }
  .stat-card { min-height: 118px; }
  .table-toolbar { align-items: stretch; flex-direction: column; }
  .table-toolbar .page-actions { width: 100%; }
  .table-toolbar select.input { width: 100% !important; }
  .search-box { width: 100%; }
  .section-title { align-items: flex-start; }
  .lesson-row { grid-template-columns: auto minmax(0, 1fr); }
  .lesson-status { grid-column: 2; justify-self: start; }
  .quick-item { align-items: flex-start; }
  .topbar-title p { display: none; }
  .topbar-title h1 { max-width: 180px; }
  .toast-root { right: 12px; left: 12px; bottom: 92px; }
  .toast { width: 100%; min-width: 0; }
}

@media (max-width: 430px) {
  .topbar { padding-inline: 12px; }
  .topbar-title h1 { max-width: 145px; font-size: 14px; }
  .page { padding-inline: 13px; }
  .card, .hero-card, .video-card { border-radius: 16px; }
  .card-pad, .section-card, .video-info { padding: 16px; }
  .hero-actions .btn { width: 100%; }
  .auth-card h2 { font-size: 26px; }
  .bottom-nav { right: 8px; left: 8px; }
  .bottom-link { font-size: 8px; }
}

/* V2.3 reviewed authentication and production-test cleanup */
.form-success { margin-bottom: 15px; padding: 11px 13px; border: 1px solid var(--green-100); border-radius: 11px; background: var(--green-50); color: var(--green-700); font-size: 11.5px; line-height: 1.7; }
.auth-register-wrap { align-items: start; overflow-y: auto; }
.auth-card-wide { width: min(620px, 100%); padding-block: 14px 30px; }
.register-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 15px; }
.register-span-2 { grid-column: 1 / -1; }
.register-note { padding: 12px 14px; border: 1px solid var(--blue-100); border-radius: 12px; background: var(--blue-50); color: var(--blue-800); font-size: 11px; line-height: 1.8; }
.affiliate-register-banner { margin: 0 0 16px; padding: 11px 13px; border: 1px solid var(--green-100); border-radius: 11px; background: var(--green-50); color: var(--green-700); font-size: 11.5px; }
.profile-card { max-width: 760px; }
@media (max-width: 680px) {
  .register-grid { grid-template-columns: 1fr; }
  .register-span-2 { grid-column: auto; }
  .auth-card-wide { padding-top: 0; }
}

/* ADS V2.4 — complete operational screens */
.tabs { display:flex; flex-wrap:wrap; gap:8px; padding:7px; border:1px solid var(--slate-200); border-radius:14px; background:var(--slate-50); }
.tab-btn { border:0; border-radius:10px; padding:9px 13px; background:transparent; color:var(--slate-600); font:inherit; font-size:11px; font-weight:700; cursor:pointer; }
.tab-btn.active { background:#fff; color:var(--blue-700); box-shadow:var(--shadow-sm); }
.form-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:15px; }
.form-grid-3 { grid-template-columns:repeat(3,minmax(0,1fr)); }
.form-span-2 { grid-column:1/-1; }
.field-group { display:grid; gap:7px; }
.field-group label { color:var(--slate-700); font-size:11px; font-weight:700; }
.field-help { color:var(--slate-500); font-size:10px; line-height:1.6; }
.textarea { min-height:110px; resize:vertical; }
.file-drop { display:grid; place-items:center; gap:8px; min-height:150px; padding:20px; border:2px dashed var(--slate-300); border-radius:16px; background:var(--slate-50); text-align:center; cursor:pointer; transition:.2s; }
.file-drop:hover,.file-drop.dragover { border-color:var(--blue-400); background:var(--blue-50); }
.file-drop input { display:none; }
.file-drop svg { width:30px; height:30px; color:var(--blue-600); }
.selected-files { display:grid; gap:8px; margin-top:10px; }
.selected-file { display:flex; align-items:center; justify-content:space-between; gap:10px; padding:9px 11px; border:1px solid var(--slate-200); border-radius:11px; background:#fff; font-size:10.5px; }
.timeline { position:relative; display:grid; gap:13px; }
.timeline::before { content:''; position:absolute; top:8px; bottom:8px; right:15px; width:2px; background:var(--slate-100); }
.timeline-item { position:relative; margin-right:34px; padding:12px 14px; border:1px solid var(--slate-200); border-radius:13px; background:#fff; }
.timeline-item::before { content:''; position:absolute; right:-26px; top:15px; width:10px; height:10px; border:3px solid #fff; border-radius:50%; background:var(--blue-500); box-shadow:0 0 0 2px var(--blue-100); }
.timeline-item.staff::before { background:var(--green-500); }
.timeline-item p { margin:5px 0; color:var(--slate-700); font-size:11.5px; line-height:1.8; white-space:pre-wrap; }
.timeline-meta { display:flex; justify-content:space-between; gap:10px; color:var(--slate-400); font-size:9.5px; }
.ticket-list { display:grid; gap:10px; }
.ticket-card { display:grid; grid-template-columns:minmax(0,1fr) auto; gap:12px; align-items:center; padding:14px; border:1px solid var(--slate-200); border-radius:14px; background:#fff; cursor:pointer; transition:.2s; }
.ticket-card:hover { border-color:var(--blue-200); transform:translateY(-1px); box-shadow:var(--shadow-sm); }
.ticket-card h4 { margin:0 0 5px; color:var(--slate-800); font-size:12.5px; }
.ticket-card p { margin:0; color:var(--slate-500); font-size:10px; }
.status-dot { width:8px; height:8px; border-radius:50%; background:var(--slate-400); }
.status-dot.open { background:var(--amber-500); }
.status-dot.in_progress { background:var(--blue-500); }
.status-dot.waiting_student { background:var(--purple-500,#8b5cf6); }
.status-dot.resolved,.status-dot.closed { background:var(--green-500); }
.modal-overlay { position:fixed; inset:0; z-index:110; display:grid; place-items:center; padding:18px; background:rgba(8,20,38,.58); backdrop-filter:blur(4px); }
.modal-card { width:min(760px,96vw); max-height:92vh; overflow:auto; border-radius:20px; background:#fff; box-shadow:var(--shadow-lg); animation:modalIn .18s ease; }
.modal-card.modal-wide { width:min(1060px,96vw); }
.modal-head { position:sticky; top:0; z-index:2; display:flex; align-items:center; justify-content:space-between; gap:12px; padding:18px 20px; border-bottom:1px solid var(--slate-100); background:rgba(255,255,255,.96); backdrop-filter:blur(12px); }
.modal-head h3 { margin:0; color:var(--slate-900); font-size:16px; }
.modal-body { padding:20px; }
.modal-foot { position:sticky; bottom:0; z-index:2; display:flex; justify-content:flex-end; gap:9px; padding:14px 20px; border-top:1px solid var(--slate-100); background:rgba(255,255,255,.96); }
.icon-btn { width:36px; height:36px; display:grid; place-items:center; border:1px solid var(--slate-200); border-radius:10px; background:#fff; color:var(--slate-600); cursor:pointer; }
.icon-btn:hover { color:var(--blue-700); border-color:var(--blue-200); background:var(--blue-50); }
.icon-btn.danger:hover { color:var(--red-700); border-color:var(--red-100); background:var(--red-50); }
.icon-btn svg { width:17px; height:17px; }
@keyframes modalIn { from { opacity:0; transform:translateY(8px) scale(.99); } }
.content-builder { display:grid; gap:14px; }
.content-module { border:1px solid var(--slate-200); border-radius:16px; background:#fff; overflow:hidden; }
.content-module-head { display:grid; grid-template-columns:auto minmax(0,1fr) auto; gap:12px; align-items:center; padding:14px 16px; background:var(--slate-50); border-bottom:1px solid var(--slate-100); }
.content-module-head h3 { margin:0; color:var(--slate-800); font-size:13px; }
.content-module-head p { margin:3px 0 0; color:var(--slate-500); font-size:9.5px; }
.drag-handle { color:var(--slate-400); cursor:grab; }
.drag-handle svg { width:18px; height:18px; }
.content-lessons { display:grid; gap:0; }
.content-lesson { display:grid; grid-template-columns:auto auto minmax(0,1fr) auto; gap:11px; align-items:center; padding:12px 16px; border-bottom:1px solid var(--slate-100); }
.content-lesson:last-child { border-bottom:0; }
.content-lesson-title { font-size:11.5px; font-weight:700; color:var(--slate-800); }
.content-lesson-meta { margin-top:3px; color:var(--slate-500); font-size:9.5px; }
.content-actions { display:flex; gap:6px; }
.pipeline-board { display:flex; gap:14px; min-height:520px; overflow-x:auto; padding-bottom:12px; scroll-snap-type:x proximity; }
.pipeline-column { flex:0 0 300px; padding:10px; border:1px solid var(--slate-200); border-radius:16px; background:var(--slate-50); scroll-snap-align:start; }
.pipeline-head { display:flex; align-items:center; justify-content:space-between; gap:10px; padding:5px 4px 12px; }
.pipeline-head h3 { margin:0; color:var(--slate-800); font-size:12px; }
.pipeline-cards { display:grid; gap:9px; min-height:420px; }
.pipeline-card { padding:12px; border:1px solid var(--slate-200); border-radius:13px; background:#fff; box-shadow:0 3px 10px rgba(15,23,42,.04); cursor:pointer; }
.pipeline-card.dragging { opacity:.45; }
.pipeline-card h4 { margin:0 0 7px; color:var(--slate-900); font-size:11.5px; }
.pipeline-card p { margin:3px 0; color:var(--slate-500); font-size:9.5px; }
.pipeline-card-foot { display:flex; justify-content:space-between; gap:8px; margin-top:9px; }
.report-chart { min-height:280px; padding:18px; border:1px solid var(--slate-200); border-radius:16px; background:#fff; }
.bar-chart { height:220px; display:flex; align-items:flex-end; gap:8px; padding:18px 4px 0; border-bottom:1px solid var(--slate-200); }
.bar-item { flex:1; min-width:22px; display:grid; align-content:end; justify-items:center; gap:6px; height:100%; }
.bar { width:min(32px,78%); min-height:3px; border-radius:7px 7px 2px 2px; background:linear-gradient(180deg,var(--blue-500),var(--blue-700)); }
.bar-label { max-width:58px; overflow:hidden; text-overflow:ellipsis; color:var(--slate-500); font-size:8px; white-space:nowrap; }
.settings-layout { display:grid; grid-template-columns:220px minmax(0,1fr); gap:18px; align-items:start; }
.settings-menu { position:sticky; top:90px; display:grid; gap:6px; padding:8px; border:1px solid var(--slate-200); border-radius:15px; background:#fff; }
.settings-menu button { border:0; border-radius:10px; padding:10px 12px; background:transparent; text-align:right; color:var(--slate-600); font:inherit; font-size:11px; font-weight:700; cursor:pointer; }
.settings-menu button.active { background:var(--blue-50); color:var(--blue-700); }
.settings-panel { display:none; }
.settings-panel.active { display:block; }
.switch-row { display:flex; align-items:center; justify-content:space-between; gap:16px; padding:13px 0; border-bottom:1px solid var(--slate-100); }
.switch-row:last-child { border-bottom:0; }
.switch-copy strong { display:block; color:var(--slate-800); font-size:11.5px; }
.switch-copy small { display:block; margin-top:3px; color:var(--slate-500); font-size:9.5px; }
.switch { position:relative; width:42px; height:24px; flex:0 0 auto; }
.switch input { opacity:0; width:0; height:0; }
.switch span { position:absolute; inset:0; border-radius:999px; background:var(--slate-300); cursor:pointer; transition:.2s; }
.switch span::after { content:''; position:absolute; top:3px; right:3px; width:18px; height:18px; border-radius:50%; background:#fff; box-shadow:0 2px 6px rgba(0,0,0,.18); transition:.2s; }
.switch input:checked + span { background:var(--blue-600); }
.switch input:checked + span::after { transform:translateX(-18px); }
.receipt-preview { width:54px; height:54px; display:grid; place-items:center; overflow:hidden; border:1px solid var(--slate-200); border-radius:10px; background:var(--slate-50); }
.receipt-preview img { width:100%; height:100%; object-fit:cover; }
.table-actions { display:flex; gap:6px; flex-wrap:wrap; }
.badge-purple { background:#f3e8ff; color:#7e22ce; }
.badge-red { background:var(--red-50); color:var(--red-700); }
.btn-danger { background:var(--red-600,#dc2626); color:#fff; }
.btn-danger:hover { background:var(--red-700,#b91c1c); }
.btn-success { background:var(--green-600,#16a34a); color:#fff; }
.btn-success:hover { background:var(--green-700,#15803d); }
.inline-alert { display:flex; align-items:flex-start; gap:10px; padding:12px 14px; border-radius:12px; font-size:10.5px; line-height:1.7; }
.inline-alert.info { border:1px solid var(--blue-100); background:var(--blue-50); color:var(--blue-800); }
.inline-alert.warning { border:1px solid var(--amber-100); background:var(--amber-50); color:var(--amber-800); }
.audit-meta { max-width:320px; direction:ltr; text-align:left; white-space:pre-wrap; word-break:break-word; font-family:monospace; font-size:9px; }

@media (max-width:900px) {
  .settings-layout { grid-template-columns:1fr; }
  .settings-menu { position:static; display:flex; overflow:auto; }
  .settings-menu button { flex:0 0 auto; white-space:nowrap; }
  .form-grid,.form-grid-3 { grid-template-columns:1fr; }
  .form-span-2 { grid-column:auto; }
}
@media (max-width:620px) {
  .modal-overlay { padding:0; align-items:end; }
  .modal-card,.modal-card.modal-wide { width:100%; max-height:94vh; border-radius:20px 20px 0 0; }
  .content-module-head { grid-template-columns:auto minmax(0,1fr); }
  .content-module-head .content-actions { grid-column:1/-1; }
  .content-lesson { grid-template-columns:auto minmax(0,1fr); }
  .content-lesson > .drag-handle { display:none; }
  .content-lesson .content-actions { grid-column:2; }
  .ticket-card { grid-template-columns:1fr; }
  .pipeline-column { flex-basis:86vw; }
}