/* ==========================================================================
   SuperPrep LMS — front-end stylesheet
   All colours / fonts / radii come from CSS variables that PHP injects from
   the Brand Settings, so a brand can be re-skinned without a rebuild.
   ========================================================================== */

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img, svg, video { max-width: 100%; height: auto; display: block; }
a { color: var(--c-primary); text-decoration: none; }
a:hover { color: var(--c-primary-dark); }
h1, h2, h3, h4, h5 { margin: 0 0 .6em; line-height: 1.35; font-weight: 700; color: var(--c-text); }
h1 { font-size: 2rem; } h2 { font-size: 1.5rem; } h3 { font-size: 1.2rem; } h4 { font-size: 1.05rem; }
p { margin: 0 0 1rem; }
hr { border: 0; border-top: 1px solid var(--c-border); margin: 24px 0; }
code, .code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .85em; background: var(--c-surface); padding: 2px 6px; border-radius: 6px; }
small { font-size: .82em; }
:focus-visible { outline: 2px solid var(--c-primary); outline-offset: 2px; }

/* ---------- layout ---------- */
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 18px; }
.container-narrow { max-width: 720px; }
.container-mid { max-width: 960px; }
.row { display: flex; flex-wrap: wrap; gap: 20px; }
.row > * { min-width: 0; }
.col { flex: 1 1 260px; }
.col-8 { flex: 0 0 100%; } .col-4 { flex: 1 1 300px; }
@media (min-width: 900px) { .col-8 { flex: 0 0 64%; } .col-4 { flex: 1 1 30%; } }
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
.grid-5 { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
.section { padding: 56px 0; }
.section-sm { padding: 32px 0; }
.bg-surface { background: var(--c-surface); }
.mt-0 { margin-top: 0 } .mt-1 { margin-top: 8px } .mt-2 { margin-top: 16px } .mt-3 { margin-top: 24px } .mt-4 { margin-top: 32px }
.mb-0 { margin-bottom: 0 } .mb-1 { margin-bottom: 8px } .mb-2 { margin-bottom: 16px } .mb-3 { margin-bottom: 24px }
.text-center { text-align: center } .text-right { text-align: right }
.muted { color: var(--c-muted) }
.small { font-size: .85rem }
.strong { font-weight: 700 }
.nowrap { white-space: nowrap }
.hide { display: none !important }
.flex { display: flex; align-items: center; gap: 10px }
.flex-between { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap }
.flex-wrap { flex-wrap: wrap }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 20px; border: 1px solid transparent; border-radius: var(--radius-sm);
  background: var(--c-primary); color: #fff; font: inherit; font-weight: 600;
  font-size: .93rem; cursor: pointer; text-align: center; transition: .18s ease;
  line-height: 1.2; white-space: nowrap;
}
.btn:hover { background: var(--c-primary-dark); color: #fff; transform: translateY(-1px); }
.btn:active { transform: none; }
.btn-block { width: 100%; }
.btn-lg { padding: 14px 28px; font-size: 1rem; }
.btn-sm { padding: 7px 13px; font-size: .82rem; }
.btn-xs { padding: 4px 9px; font-size: .75rem; border-radius: 6px; }
.btn-outline { background: transparent; color: var(--c-primary); border-color: var(--c-primary); }
.btn-outline:hover { background: var(--c-primary); }
.btn-ghost { background: var(--c-surface); color: var(--c-text); border-color: var(--c-border); }
.btn-ghost:hover { background: var(--c-border); color: var(--c-text); }
.btn-accent { background: var(--c-accent); } .btn-accent:hover { filter: brightness(.92); }
.btn-success { background: var(--c-success); } .btn-success:hover { filter: brightness(.92); }
.btn-danger { background: var(--c-danger); } .btn-danger:hover { filter: brightness(.92); }
.btn-white { background: #fff; color: var(--c-primary); border-color: #fff; }
.btn-white:hover { background: #f1f5f9; color: var(--c-primary); }
.btn[disabled], .btn.is-disabled { opacity: .55; pointer-events: none; }
.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }
.btn-pill { border-radius: 999px; }

/* ---------- cards ---------- */
.card {
  background: var(--c-card); border: 1px solid var(--c-border);
  border-radius: var(--radius); padding: 20px;
}
.card-pad-0 { padding: 0; overflow: hidden; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 16px 20px; border-bottom: 1px solid var(--c-border); flex-wrap: wrap; }
.card-body { padding: 20px; }
.card-foot { padding: 14px 20px; border-top: 1px solid var(--c-border); background: var(--c-surface); }
.card-hover { transition: .2s ease; }
.card-hover:hover { transform: translateY(-3px); box-shadow: 0 12px 28px rgba(15, 23, 42, .10); border-color: var(--c-primary); }

/* ---------- badges & pills ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 5px; padding: 3px 10px;
  border-radius: 999px; font-size: .75rem; font-weight: 600;
  background: var(--c-surface); color: var(--c-muted); border: 1px solid var(--c-border);
  white-space: nowrap;
}
.badge-primary { background: color-mix(in srgb, var(--c-primary) 12%, transparent); color: var(--c-primary); border-color: color-mix(in srgb, var(--c-primary) 25%, transparent); }
.badge-success { background: color-mix(in srgb, var(--c-success) 13%, transparent); color: var(--c-success); border-color: color-mix(in srgb, var(--c-success) 25%, transparent); }
.badge-danger  { background: color-mix(in srgb, var(--c-danger) 13%, transparent);  color: var(--c-danger);  border-color: color-mix(in srgb, var(--c-danger) 25%, transparent); }
.badge-warning { background: color-mix(in srgb, var(--c-accent) 16%, transparent);  color: #92400E;          border-color: color-mix(in srgb, var(--c-accent) 30%, transparent); }
.badge-dark    { background: var(--c-secondary); color: #fff; border-color: var(--c-secondary); }
.dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; display: inline-block; }

/* ---------- forms ---------- */
.form-group { margin-bottom: 16px; }
label, .label { display: block; font-weight: 600; font-size: .86rem; margin-bottom: 6px; }
.input, input[type=text], input[type=email], input[type=password], input[type=number],
input[type=tel], input[type=url], input[type=date], input[type=datetime-local], input[type=search],
select, textarea {
  width: 100%; padding: 10px 13px; font: inherit; font-size: .93rem;
  color: var(--c-text); background: var(--c-bg);
  border: 1px solid var(--c-border); border-radius: var(--radius-sm); transition: .15s;
}
textarea { min-height: 110px; resize: vertical; line-height: 1.6; }
.input:focus, select:focus, textarea:focus, input:focus { outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--c-primary) 15%, transparent); }
select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--c-muted) 50%), linear-gradient(135deg, var(--c-muted) 50%, transparent 50%); background-position: calc(100% - 18px) 52%, calc(100% - 13px) 52%; background-size: 5px 5px, 5px 5px; background-repeat: no-repeat; padding-right: 34px; }
input[type=file] { padding: 8px; font-size: .85rem; }
input[type=color] { width: 54px; height: 40px; padding: 2px; border-radius: 8px; cursor: pointer; }
.hint { font-size: .78rem; color: var(--c-muted); margin-top: 5px; }
.form-row { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.check { display: flex; align-items: flex-start; gap: 9px; font-size: .9rem; cursor: pointer; }
.check input[type=checkbox], .check input[type=radio] { width: 17px; height: 17px; margin: 2px 0 0; accent-color: var(--c-primary); flex: none; }
fieldset { border: 1px solid var(--c-border); border-radius: var(--radius); padding: 18px; margin: 0 0 20px; }
legend { font-weight: 700; padding: 0 8px; font-size: .9rem; }
.search-form { display: flex; gap: 8px; flex-wrap: wrap; }
.search-form .input { flex: 1 1 200px; }

/* ---------- alerts ---------- */
.alert { padding: 13px 16px; border-radius: var(--radius-sm); border: 1px solid; margin-bottom: 14px; font-size: .9rem; display: flex; gap: 10px; align-items: flex-start; }
.alert-success { background: color-mix(in srgb, var(--c-success) 9%, transparent); border-color: color-mix(in srgb, var(--c-success) 32%, transparent); color: #14532D; }
.alert-error   { background: color-mix(in srgb, var(--c-danger) 9%, transparent);  border-color: color-mix(in srgb, var(--c-danger) 32%, transparent);  color: #7F1D1D; }
.alert-warning { background: color-mix(in srgb, var(--c-accent) 12%, transparent); border-color: color-mix(in srgb, var(--c-accent) 35%, transparent); color: #78350F; }
.alert-info    { background: color-mix(in srgb, var(--c-primary) 8%, transparent);  border-color: color-mix(in srgb, var(--c-primary) 28%, transparent); color: #1E3A8A; }
[data-theme="dark"] .alert-success { color: #86EFAC; }
[data-theme="dark"] .alert-error { color: #FCA5A5; }
[data-theme="dark"] .alert-warning { color: #FCD34D; }
[data-theme="dark"] .alert-info { color: #93C5FD; }
[data-theme="dark"] .badge-warning { color: #FCD34D; }

/* ---------- header / nav ---------- */
.site-header { position: sticky; top: 0; z-index: 60; background: var(--c-bg); border-bottom: 1px solid var(--c-border); }
.site-header .inner { display: flex; align-items: center; gap: 18px; height: 66px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.15rem; color: var(--c-text); }
.brand img { height: 34px; width: auto; }
.brand-mark { width: 36px; height: 36px; border-radius: 10px; background: var(--c-primary); color: #fff; display: grid; place-items: center; font-weight: 800; }
.main-nav { display: none; }
@media (min-width: 992px) { .main-nav { display: flex; align-items: center; gap: 4px; flex: 1; } }
.main-nav a { padding: 8px 12px; border-radius: 8px; color: var(--c-text); font-weight: 500; font-size: .92rem; }
.main-nav a:hover, .main-nav a.is-active { background: var(--c-surface); color: var(--c-primary); }
.header-actions { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.icon-btn { width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--c-border); background: var(--c-bg); color: var(--c-text); display: grid; place-items: center; cursor: pointer; position: relative; font-size: 1rem; }
.icon-btn:hover { background: var(--c-surface); }
.icon-btn .count { position: absolute; top: -5px; right: -5px; background: var(--c-danger); color: #fff; font-size: .66rem; min-width: 18px; height: 18px; border-radius: 9px; display: grid; place-items: center; padding: 0 4px; font-weight: 700; }
.avatar { width: 38px; height: 38px; border-radius: 50%; object-fit: cover; background: var(--c-primary); color: #fff; display: grid; place-items: center; font-weight: 700; font-size: .85rem; flex: none; }
.avatar-sm { width: 30px; height: 30px; font-size: .72rem; }
.avatar-lg { width: 76px; height: 76px; font-size: 1.5rem; }
.avatar-xl { width: 108px; height: 108px; font-size: 2rem; }

.dropdown { position: relative; }
.dropdown-menu { position: absolute; right: 0; top: calc(100% + 8px); min-width: 215px; background: var(--c-card); border: 1px solid var(--c-border); border-radius: var(--radius-sm); box-shadow: 0 14px 34px rgba(15, 23, 42, .14); padding: 7px; display: none; z-index: 70; }
.dropdown.is-open .dropdown-menu { display: block; }
.dropdown-menu a { display: flex; align-items: center; gap: 9px; padding: 9px 11px; border-radius: 8px; color: var(--c-text); font-size: .9rem; }
.dropdown-menu a:hover { background: var(--c-surface); color: var(--c-primary); }
.dropdown-menu .divider { height: 1px; background: var(--c-border); margin: 6px 4px; }

.nav-toggle { display: grid; }
@media (min-width: 992px) { .nav-toggle { display: none; } }
.mobile-nav { display: none; border-top: 1px solid var(--c-border); background: var(--c-bg); padding: 10px 0 16px; }
.mobile-nav.is-open { display: block; }
.mobile-nav a { display: block; padding: 11px 4px; border-bottom: 1px solid var(--c-border); color: var(--c-text); font-weight: 500; }

.topbar { background: var(--c-secondary); color: #E2E8F0; font-size: .8rem; padding: 7px 0; }
.topbar a { color: #E2E8F0; }

/* ---------- hero ---------- */
.hero { background: var(--c-surface); padding: 52px 0 44px; position: relative; overflow: hidden; }
.hero-grid { display: grid; gap: 32px; align-items: center; }
@media (min-width: 900px) { .hero-grid { grid-template-columns: 1.1fr .9fr; } }
.hero h1 { font-size: clamp(1.7rem, 4vw, 2.7rem); margin-bottom: 14px; }
.hero p.lead { font-size: 1.02rem; color: var(--c-muted); margin-bottom: 22px; max-width: 560px; }
.hero-card { background: var(--c-card); border: 1px solid var(--c-border); border-radius: var(--radius-lg); padding: 22px; box-shadow: 0 18px 44px rgba(15, 23, 42, .08); }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 14px; }
.stat { background: var(--c-card); border: 1px solid var(--c-border); border-radius: var(--radius-sm); padding: 14px; }
.stat .value { font-size: 1.5rem; font-weight: 800; line-height: 1.2; }
.stat .label { font-size: .78rem; color: var(--c-muted); margin: 0; font-weight: 500; }
.stat-primary { border-left: 4px solid var(--c-primary); }
.stat-accent { border-left: 4px solid var(--c-accent); }
.stat-success { border-left: 4px solid var(--c-success); }
.stat-danger { border-left: 4px solid var(--c-danger); }

.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 14px; margin-bottom: 24px; flex-wrap: wrap; }
.section-head h2 { margin: 0 0 4px; }
.section-head p { margin: 0; color: var(--c-muted); font-size: .92rem; }

/* ---------- course card ---------- */
.course-card { display: flex; flex-direction: column; background: var(--c-card); border: 1px solid var(--c-border); border-radius: var(--radius); overflow: hidden; transition: .2s; height: 100%; }
.course-card:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(15, 23, 42, .10); }
.course-thumb { position: relative; aspect-ratio: 16 / 9; background: var(--c-surface); overflow: hidden; }
.course-thumb img { width: 100%; height: 100%; object-fit: cover; }
.course-thumb .placeholder { width: 100%; height: 100%; display: grid; place-items: center; color: var(--c-muted); font-weight: 700; font-size: 1.4rem; background: linear-gradient(135deg, color-mix(in srgb, var(--c-primary) 12%, transparent), color-mix(in srgb, var(--c-accent) 12%, transparent)); }
.course-thumb .flag { position: absolute; top: 10px; left: 10px; }
.course-body { padding: 15px; display: flex; flex-direction: column; gap: 9px; flex: 1; }
.course-body h3 { font-size: 1rem; margin: 0; line-height: 1.45; }
.course-body h3 a { color: var(--c-text); }
.course-body h3 a:hover { color: var(--c-primary); }
.course-meta { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; font-size: .79rem; color: var(--c-muted); }
.course-foot { margin-top: auto; display: flex; align-items: center; justify-content: space-between; gap: 10px; padding-top: 10px; border-top: 1px dashed var(--c-border); }
.price { font-weight: 800; font-size: 1.06rem; color: var(--c-primary); }
.price-old { text-decoration: line-through; color: var(--c-muted); font-size: .85rem; font-weight: 500; margin-left: 6px; }
.rating { color: var(--c-accent); font-weight: 700; }

/* ---------- tables ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--c-border); border-radius: var(--radius); background: var(--c-card); }
table.table { width: 100%; border-collapse: collapse; font-size: .88rem; min-width: 620px; }
table.table th, table.table td { padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--c-border); vertical-align: middle; }
table.table th { background: var(--c-surface); font-weight: 700; font-size: .78rem; text-transform: uppercase; letter-spacing: .03em; color: var(--c-muted); white-space: nowrap; }
table.table tbody tr:hover { background: color-mix(in srgb, var(--c-primary) 4%, transparent); }
table.table tbody tr:last-child td { border-bottom: 0; }
table.table td.actions { white-space: nowrap; text-align: right; }
.truncate { max-width: 320px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; display: block; }

/* ---------- progress ---------- */
.progress { height: 8px; background: var(--c-border); border-radius: 99px; overflow: hidden; }
.progress > span { display: block; height: 100%; background: var(--c-primary); border-radius: 99px; transition: width .4s; }
.progress-lg { height: 12px; }
.progress-success > span { background: var(--c-success); }

/* ---------- tabs / pills nav ---------- */
.tabs { display: flex; gap: 6px; overflow-x: auto; border-bottom: 1px solid var(--c-border); margin-bottom: 22px; padding-bottom: 2px; }
.tabs a { padding: 9px 14px; border-radius: 9px 9px 0 0; color: var(--c-muted); font-weight: 600; font-size: .9rem; white-space: nowrap; border-bottom: 2px solid transparent; }
.tabs a:hover { color: var(--c-text); background: var(--c-surface); }
.tabs a.is-active { color: var(--c-primary); border-bottom-color: var(--c-primary); background: color-mix(in srgb, var(--c-primary) 6%, transparent); }
.pill-nav { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }
.pill-nav a { padding: 7px 14px; border-radius: 999px; border: 1px solid var(--c-border); color: var(--c-text); font-size: .85rem; background: var(--c-card); }
.pill-nav a.is-active, .pill-nav a:hover { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }

/* ---------- accordion (curriculum / FAQ) ---------- */
.acc { border: 1px solid var(--c-border); border-radius: var(--radius-sm); overflow: hidden; margin-bottom: 10px; background: var(--c-card); }
.acc-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 16px; cursor: pointer; font-weight: 600; font-size: .95rem; }
.acc-head:hover { background: var(--c-surface); }
.acc-body { padding: 0 16px; max-height: 0; overflow: hidden; transition: max-height .25s ease; }
.acc.is-open .acc-body { max-height: 2200px; padding: 6px 16px 14px; }
.acc-body p:last-child { margin-bottom: 0; }
.lesson-row { display: flex; align-items: center; gap: 12px; padding: 10px 0; border-bottom: 1px dashed var(--c-border); font-size: .89rem; }
.lesson-row:last-child { border-bottom: 0; }
.lesson-row .num { width: 26px; height: 26px; border-radius: 50%; background: var(--c-surface); display: grid; place-items: center; font-size: .72rem; font-weight: 700; color: var(--c-muted); flex: none; }
.lesson-row .grow { flex: 1; min-width: 0; }
.lesson-row.is-locked { opacity: .62; }
.lesson-row.is-current { background: color-mix(in srgb, var(--c-primary) 8%, transparent); border-radius: 8px; padding-inline: 10px; }

/* ---------- pagination ---------- */
.pagination { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; margin-top: 28px; }
.page-link { min-width: 38px; height: 38px; padding: 0 11px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--c-border); border-radius: 9px; color: var(--c-text); font-size: .88rem; background: var(--c-card); }
.page-link:hover { border-color: var(--c-primary); color: var(--c-primary); }
.page-link.is-active { background: var(--c-primary); border-color: var(--c-primary); color: #fff; }
.page-link.is-disabled { opacity: .45; pointer-events: none; }
.page-dots { padding: 0 4px; color: var(--c-muted); align-self: center; }

/* ---------- sidebar layouts ---------- */
.layout { display: grid; gap: 26px; align-items: start; }
@media (min-width: 992px) { .layout-sidebar { grid-template-columns: 258px 1fr; } .layout-sidebar-right { grid-template-columns: 1fr 300px; } }
.side-nav { background: var(--c-card); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 10px; position: sticky; top: 82px; }
.side-nav a { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 9px; color: var(--c-text); font-size: .9rem; font-weight: 500; }
.side-nav a:hover { background: var(--c-surface); }
.side-nav a.is-active { background: var(--c-primary); color: #fff; font-weight: 600; }
.side-nav .nav-group { font-size: .72rem; text-transform: uppercase; letter-spacing: .06em; color: var(--c-muted); padding: 14px 12px 6px; font-weight: 700; }
.side-nav .ico { width: 20px; text-align: center; flex: none; }

/* ---------- player ---------- */
.player-wrap { background: #0B1220; min-height: 100vh; color: #E2E8F0; }
.player-bar { display: flex; align-items: center; gap: 14px; padding: 12px 18px; border-bottom: 1px solid #1E2C45; background: #0F1A2E; position: sticky; top: 0; z-index: 50; flex-wrap: wrap; }
.player-bar a { color: #E2E8F0; }
.player-bar .title { font-weight: 600; font-size: .95rem; flex: 1; min-width: 140px; }
.player-main { display: grid; gap: 0; }
@media (min-width: 992px) { .player-main { grid-template-columns: 1fr 348px; } }
.video-frame { aspect-ratio: 16 / 9; width: 100%; background: #000; }
.video-frame iframe, .video-frame video { width: 100%; height: 100%; border: 0; }
.player-side { background: #0F1A2E; border-left: 1px solid #1E2C45; max-height: calc(100vh - 60px); overflow-y: auto; }
.player-side .lesson-row { border-bottom-color: #1E2C45; color: #CBD5E1; padding: 12px 16px; }
.player-side .lesson-row:hover { background: #16233A; }
.player-side .lesson-row .num { background: #16233A; color: #94A3B8; }
.player-side .lesson-row.is-current { background: #16233A; color: #fff; }
.player-content { padding: 22px; }
.resume-tag { font-size: .72rem; color: var(--c-accent); }

/* ---------- quiz ---------- */
.question { border: 1px solid var(--c-border); border-radius: var(--radius); background: var(--c-card); padding: 20px; margin-bottom: 18px; }
.question .qnum { font-weight: 800; color: var(--c-primary); margin-right: 6px; }
.option { display: flex; align-items: flex-start; gap: 11px; padding: 11px 13px; border: 1px solid var(--c-border); border-radius: var(--radius-sm); margin-bottom: 9px; cursor: pointer; font-size: .92rem; transition: .15s; }
.option:hover { border-color: var(--c-primary); background: color-mix(in srgb, var(--c-primary) 5%, transparent); }
.option input { width: 17px; height: 17px; margin-top: 3px; accent-color: var(--c-primary); flex: none; }
.option.is-correct { border-color: var(--c-success); background: color-mix(in srgb, var(--c-success) 9%, transparent); }
.option.is-wrong { border-color: var(--c-danger); background: color-mix(in srgb, var(--c-danger) 9%, transparent); }
.timer { font-variant-numeric: tabular-nums; font-weight: 700; }
.timer.is-low { color: var(--c-danger); }
.explanation { background: var(--c-surface); border-left: 3px solid var(--c-primary); border-radius: 0 8px 8px 0; padding: 12px 15px; font-size: .89rem; }

/* ---------- chat / threads ---------- */
.thread { border: 1px solid var(--c-border); border-radius: var(--radius-sm); background: var(--c-card); padding: 15px 16px; margin-bottom: 11px; }
.thread-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; margin-bottom: 6px; }
.bubble { display: flex; gap: 11px; margin-bottom: 15px; }
.bubble .body { background: var(--c-surface); border-radius: 0 12px 12px 12px; padding: 11px 14px; font-size: .9rem; flex: 1; }
.bubble.is-staff .body { background: color-mix(in srgb, var(--c-primary) 9%, transparent); border-radius: 12px 0 12px 12px; }

/* ---------- misc blocks ---------- */
.feature-item { display: flex; gap: 13px; align-items: flex-start; }
.feature-item .ico { width: 44px; height: 44px; border-radius: 12px; background: color-mix(in srgb, var(--c-primary) 12%, transparent); color: var(--c-primary); display: grid; place-items: center; flex: none; font-size: 1.15rem; font-weight: 700; }
.feature-item h4 { margin: 0 0 3px; font-size: .98rem; }
.feature-item p { margin: 0; font-size: .87rem; color: var(--c-muted); }
.testimonial { background: var(--c-card); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 20px; height: 100%; display: flex; flex-direction: column; }
.testimonial .msg { font-size: .9rem; flex: 1; }
.teacher-card { text-align: center; background: var(--c-card); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 20px; }
.teacher-card .avatar { margin: 0 auto 12px; }
.empty-state { text-align: center; padding: 46px 20px; color: var(--c-muted); }
.empty-state .ico { font-size: 2.4rem; margin-bottom: 10px; }
.thumb-note { border-radius: 8px; border: 1px solid var(--c-border); background: var(--c-surface); padding: 10px; }
.slider-track { display: flex; gap: 18px; overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 10px; scrollbar-width: thin; }
.slider-track > * { scroll-snap-align: start; flex: 0 0 min(330px, 84vw); }
.slider-track::-webkit-scrollbar { height: 8px; }
.slider-track::-webkit-scrollbar-thumb { background: var(--c-border); border-radius: 9px; }

/* ---------- footer ---------- */
.site-footer { background: var(--c-secondary); color: #CBD5E1; padding: 48px 0 20px; margin-top: 50px; font-size: .89rem; }
.site-footer h4 { color: #fff; font-size: .95rem; margin-bottom: 14px; }
.site-footer a { color: #CBD5E1; display: block; padding: 4px 0; }
.site-footer a:hover { color: #fff; }
.site-footer .bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 30px; padding-top: 18px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: .82rem; color: #94A3B8; }
.social-links { display: flex; gap: 9px; }
.social-links a { width: 36px; height: 36px; border-radius: 10px; background: rgba(255,255,255,.09); display: grid; place-items: center; }

/* ---------- cookie consent ---------- */
.cookie-bar { position: fixed; left: 16px; right: 16px; bottom: 16px; z-index: 90; background: var(--c-card); border: 1px solid var(--c-border); border-radius: var(--radius); box-shadow: 0 18px 44px rgba(15,23,42,.2); padding: 18px; max-width: 720px; margin: 0 auto; display: none; }
.cookie-bar.is-visible { display: block; }
.cookie-bar h4 { margin: 0 0 6px; }
.cookie-bar .opts { display: flex; gap: 16px; flex-wrap: wrap; margin: 12px 0; }

/* ---------- auth screens ---------- */
.auth-wrap { min-height: 100vh; display: grid; place-items: center; padding: 34px 18px; background: var(--c-surface); }
.auth-card { width: 100%; max-width: 452px; background: var(--c-card); border: 1px solid var(--c-border); border-radius: var(--radius-lg); padding: 32px; box-shadow: 0 20px 50px rgba(15,23,42,.08); }
.auth-brand { text-align: center; margin-bottom: 24px; }
.auth-split { display: grid; min-height: 100vh; }
@media (min-width: 992px) { .auth-split { grid-template-columns: 1fr 1fr; } .auth-aside { display: block; } }
.auth-aside { display: none; background: linear-gradient(150deg, var(--c-primary), var(--c-primary-dark)); color: #fff; padding: 56px 46px; }
.auth-aside h2 { color: #fff; }
.auth-aside .points { margin-top: 26px; }
.auth-aside .points div { padding: 9px 0; border-bottom: 1px solid rgba(255,255,255,.18); }
.demo-box { background: var(--c-surface); border: 1px dashed var(--c-border); border-radius: var(--radius-sm); padding: 12px 14px; font-size: .82rem; }

/* ---------- certificate ---------- */
.cert-frame { background: #fff; color: #0F172A; border: 12px solid var(--c-primary); border-radius: 8px; padding: 54px 44px; max-width: 940px; margin: 26px auto; text-align: center; position: relative; }
.cert-frame .seal { width: 92px; height: 92px; border-radius: 50%; background: var(--c-primary); color: #fff; display: grid; place-items: center; font-weight: 800; font-size: .8rem; text-align: center; margin: 0 auto 18px; }
.cert-frame h1 { font-size: 1.9rem; letter-spacing: .04em; text-transform: uppercase; margin-bottom: 6px; }
.cert-frame .name { font-size: 2.2rem; font-weight: 800; border-bottom: 2px solid var(--c-border); display: inline-block; padding: 0 26px 8px; margin: 18px 0; }
.cert-frame .meta { display: flex; justify-content: space-between; gap: 20px; margin-top: 42px; font-size: .84rem; flex-wrap: wrap; }
.cert-frame .sig { border-top: 1px solid #94A3B8; padding-top: 6px; min-width: 170px; }

/* ---------- invoice print ---------- */
.invoice { background: #fff; color: #0F172A; max-width: 860px; margin: 26px auto; padding: 40px; }
@media print {
  .no-print { display: none !important; }
  body { background: #fff; }
  .invoice, .cert-frame { margin: 0; box-shadow: none; }
}

/* ---------- utilities for wide screens ---------- */
@media (max-width: 640px) {
  .section { padding: 36px 0; }
  h1 { font-size: 1.6rem; }
  .hide-sm { display: none !important; }
}

/* ---------- toast ---------- */
.toast-host { position: fixed; right: 16px; top: 76px; z-index: 95; display: flex; flex-direction: column; gap: 9px; max-width: 320px; }
.toast { background: var(--c-card); border: 1px solid var(--c-border); border-left: 4px solid var(--c-primary); border-radius: var(--radius-sm); padding: 11px 14px; font-size: .86rem; box-shadow: 0 12px 30px rgba(15,23,42,.14); animation: toastIn .25s ease; }
.toast.is-success { border-left-color: var(--c-success); }
.toast.is-error { border-left-color: var(--c-danger); }
@keyframes toastIn { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: none; } }