@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
  --bg: #ffffff;
  --bg-soft: #f6f7fb;
  --surface: #ffffff;
  --border: #e4e6ef;
  --text: #141625;
  --muted: #5d6178;
  --primary: #4f46e5;
  --primary-dark: #3730a3;
  --primary-soft: #eef0ff;
  --on-primary: #ffffff;
  --rec: #ff4d4f;
  --ok: #0f7b4a;
  --ok-bg: #e5f6ee;
  --warn: #8a5300;
  --warn-bg: #fff4dc;
  --danger: #c42b2b;
  --danger-bg: #fdecec;
  --radius: 14px;
  --shadow: 0 1px 2px rgb(20 22 37 / .06), 0 8px 24px rgb(20 22 37 / .06);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --bg: #0f1020; --bg-soft: #15172b; --surface: #1a1c33; --border: #2b2e4a; --text: #eceefa; --muted: #a2a6c3;
    --primary: #8b86ff; --primary-dark: #b4b0ff; --primary-soft: #23244a; --on-primary: #0f1020;
    --ok: #5fd39a; --ok-bg: #12301f; --warn: #ffcf73; --warn-bg: #33270e; --danger: #ff8a8a; --danger-bg: #3a1717;
    --shadow: 0 1px 2px rgb(0 0 0 / .3), 0 8px 24px rgb(0 0 0 / .25);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.6 'Plus Jakarta Sans', system-ui, -apple-system, 'Segoe UI', sans-serif; }
a { color: var(--primary); }
img { max-width: 100%; }
h1, h2, h3 { line-height: 1.2; letter-spacing: -0.02em; }
.container { width: min(1120px, 100% - 32px); margin-inline: auto; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.hidden, [hidden] { display: none !important; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.site-header .container { display: flex; align-items: center; gap: 20px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; color: var(--text); text-decoration: none; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.nav { display: flex; gap: 22px; margin-inline-start: auto; align-items: center; }
.nav a { color: var(--muted); text-decoration: none; font-weight: 500; font-size: 15px; }
.nav a:hover { color: var(--text); }
@media (max-width: 760px) { .nav .hide-sm { display: none; } }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 18px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); color: var(--text); font: inherit; font-weight: 600; font-size: 15px; cursor: pointer; text-decoration: none; transition: transform .08s, background .15s; }
.btn:hover { background: var(--bg-soft); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .55; cursor: default; }
.btn.primary { background: var(--primary); border-color: var(--primary); color: var(--on-primary); }
.btn.primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); }
.btn.danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, var(--border)); }
.btn.sm { padding: 6px 12px; font-size: 14px; }
.btn.lg { padding: 14px 26px; font-size: 17px; }

/* Landing */
.hero { padding: 72px 0 56px; background: radial-gradient(1200px 400px at 70% -10%, var(--primary-soft), transparent); }
.hero .container { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.hero h1 { font-size: clamp(36px, 5vw, 56px); margin: 0 0 18px; }
.hero h1 em { font-style: normal; color: var(--primary); }
.hero p.lead { font-size: 19px; color: var(--muted); margin: 0 0 28px; max-width: 34em; }
.hero .ctas { display: flex; gap: 12px; flex-wrap: wrap; }
.hero .trust { margin-top: 22px; font-size: 14px; color: var(--muted); }
@media (max-width: 860px) { .hero .container { grid-template-columns: 1fr; } }
.mock { background: var(--surface); border: 1px solid var(--border); border-radius: 18px; box-shadow: var(--shadow); padding: 18px; }
.mock .bar { display: flex; align-items: center; gap: 8px; margin-bottom: 14px; font-weight: 700; }
.mock .bar img { width: 26px; border-radius: 6px; }
.mock .rec { margin-inline-start: auto; font-size: 12px; font-weight: 700; color: var(--rec); display: flex; align-items: center; gap: 6px; }
.mock .rec::before { content: ''; width: 8px; height: 8px; border-radius: 50%; background: var(--rec); animation: pulse 1.4s infinite; }
@keyframes pulse { 50% { opacity: .3; } }
.mock table { width: 100%; border-collapse: collapse; font-size: 14px; }
.mock td { padding: 8px 4px; border-top: 1px solid var(--border); }
.mock .tag { font-size: 12px; font-weight: 600; padding: 2px 8px; border-radius: 999px; }
.tag.ok { background: var(--ok-bg); color: var(--ok); }
.tag.warn { background: var(--warn-bg); color: var(--warn); }
.tag.bad { background: var(--danger-bg); color: var(--danger); }
.tag.info { background: var(--primary-soft); color: var(--primary); }

/* Product tour (landing): tabs + localized screenshot in a browser frame */
.tour { display: grid; grid-template-columns: minmax(240px, 310px) 1fr; gap: 32px; align-items: center; }
.tour-tabs { display: grid; gap: 8px; }
.tour-tabs button { display: grid; gap: 4px; text-align: start; font: inherit; color: var(--text); background: transparent; border: 1px solid transparent; border-radius: var(--radius); padding: 14px 16px; cursor: pointer; transition: background .15s, border-color .15s, box-shadow .15s; }
.tour-tabs button strong { font-size: 16px; }
.tour-tabs button span { font-size: 14px; line-height: 1.5; color: var(--muted); }
.tour-tabs button:hover { background: color-mix(in srgb, var(--surface) 70%, transparent); }
.tour-tabs button:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.tour-tabs button[aria-selected='true'] { background: var(--surface); border-color: var(--border); box-shadow: var(--shadow); }
.tour-tabs button[aria-selected='true'] strong { color: var(--primary); }
.tour-stage { margin: 0; min-width: 0; }
.tour-window { border: 1px solid var(--border); border-radius: 16px; overflow: hidden; background: var(--surface); box-shadow: 0 2px 4px rgb(20 22 37 / .06), 0 24px 60px rgb(55 48 163 / .18); }
.tour-bar { direction: ltr; display: flex; align-items: center; gap: 7px; height: 38px; padding: 0 14px; background: var(--bg-soft); border-bottom: 1px solid var(--border); }
.tour-bar i { width: 11px; height: 11px; border-radius: 50%; background: var(--border); }
.tour-url { margin-inline: auto; padding: 2px 16px; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); color: var(--muted); font-size: 12px; direction: ltr; unicode-bidi: isolate; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 70%; }
.tour-window img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 10; background: var(--bg-soft); transition: opacity .2s; }
.tour-window img.loading { opacity: .4; }
.tour-caption { display: none; }
@media (max-width: 900px) {
  .tour { grid-template-columns: 1fr; gap: 18px; }
  .tour-tabs { display: flex; gap: 8px; overflow-x: auto; padding: 2px 2px 6px; scrollbar-width: none; }
  .tour-tabs::-webkit-scrollbar { display: none; }
  .tour-tabs button { flex: none; padding: 8px 16px; border-radius: 999px; border-color: var(--border); background: var(--surface); }
  .tour-tabs button strong { font-size: 14px; white-space: nowrap; }
  .tour-tabs button span { display: none; }
  .tour-tabs button[aria-selected='true'] { background: var(--primary); border-color: var(--primary); }
  .tour-tabs button[aria-selected='true'] strong { color: var(--on-primary); }
  .tour-caption { display: block; margin: 14px auto 0; max-width: 40em; text-align: center; color: var(--muted); font-size: 15px; }
  .tour-bar { height: 28px; }
  .tour-bar i { width: 8px; height: 8px; }
}

section.block { padding: 72px 0; }
section.block.soft { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 40px; }
.section-head h2 { font-size: clamp(28px, 3.4vw, 40px); margin: 0 0 12px; }
.section-head p { color: var(--muted); margin: 0; font-size: 18px; }
.grid { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); }
.feature .icon { width: 44px; height: 44px; border-radius: 12px; background: var(--primary-soft); color: var(--primary); display: grid; place-items: center; font-size: 22px; margin-bottom: 14px; }
.feature h3 { margin: 0 0 6px; font-size: 18px; }
.feature p { margin: 0; color: var(--muted); font-size: 15px; }
.steps { counter-reset: s; }
.steps .card h3::before { counter-increment: s; content: counter(s); display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: var(--primary); color: var(--on-primary); font-size: 14px; margin-inline-end: 10px; }

/* Pricing */
.period-toggle { display: inline-flex; background: var(--bg-soft); border: 1px solid var(--border); border-radius: 999px; padding: 4px; margin: 0 auto 28px; }
.period-toggle button { border: 0; background: none; font: inherit; font-weight: 600; padding: 8px 18px; border-radius: 999px; cursor: pointer; color: var(--muted); }
.period-toggle button.active { background: var(--surface); color: var(--text); box-shadow: var(--shadow); }
.pricing { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); align-items: stretch; }
.plan { display: flex; flex-direction: column; position: relative; }
.plan.highlight { border: 2px solid var(--primary); }
.plan .badge { position: absolute; top: -12px; inset-inline-start: 22px; background: var(--primary); color: var(--on-primary); font-size: 12px; font-weight: 700; padding: 3px 10px; border-radius: 999px; }
.plan h3 { margin: 0; font-size: 20px; }
.plan .tagline { color: var(--muted); font-size: 14px; min-height: 42px; margin: 4px 0 14px; }
.plan .price { font-size: 38px; font-weight: 800; letter-spacing: -0.03em; }
.plan .price small { font-size: 15px; font-weight: 500; color: var(--muted); letter-spacing: 0; }
.plan .note { font-size: 13px; color: var(--muted); min-height: 20px; }
.plan ul { list-style: none; padding: 0; margin: 18px 0 22px; flex: 1; }
.plan li { padding-block: 5px; padding-inline: 26px 0; position: relative; font-size: 15px; }
.plan li::before { content: '✓'; position: absolute; inset-inline-start: 0; color: var(--ok); font-weight: 800; }

.faq details { border-bottom: 1px solid var(--border); padding: 16px 0; }
.faq summary { font-weight: 600; cursor: pointer; font-size: 17px; }
.faq p { color: var(--muted); margin: 10px 0 0; }

.site-footer { border-top: 1px solid var(--border); padding: 32px 0; color: var(--muted); font-size: 14px; }
.site-footer .container { display: flex; flex-wrap: wrap; gap: 16px 28px; align-items: center; }
.site-footer a { color: var(--muted); }
.site-footer .links { display: flex; gap: 18px; flex-wrap: wrap; margin-inline-start: auto; }

/* Legal pages */
.legal { max-width: 820px; padding: 48px 0 72px; }
.legal h1 { font-size: 38px; }
.legal h2 { margin-top: 36px; font-size: 24px; }
.legal table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 15px; display: block; overflow-x: auto; }
.legal th, .legal td { border: 1px solid var(--border); padding: 8px 10px; text-align: start; vertical-align: top; }
.legal th { background: var(--bg-soft); }

/* App (dashboard / admin) */
.app { display: grid; grid-template-columns: 240px 1fr; min-height: calc(100vh - 64px); }
.sidebar { border-inline-end: 1px solid var(--border); padding: 20px 12px; background: var(--bg-soft); }
.sidebar a { display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: 10px; color: var(--text); text-decoration: none; font-weight: 500; font-size: 15px; }
.sidebar a.active { background: var(--primary-soft); color: var(--primary); font-weight: 700; }
.sidebar .sep { height: 1px; background: var(--border); margin: 12px 4px; }
.main { padding: 28px clamp(16px, 3vw, 40px); min-width: 0; }
.main h1 { margin: 0 0 6px; font-size: 28px; }
.main > .muted { margin-top: 0; }
@media (max-width: 820px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { display: flex; overflow-x: auto; gap: 4px; padding: 8px; border-inline-end: 0; border-bottom: 1px solid var(--border); }
  .sidebar .sep { display: none; }
  .sidebar a { white-space: nowrap; }
}
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; margin: 18px 0; }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.stat .label { font-size: 13px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .04em; }
.stat .value { font-size: 28px; font-weight: 800; margin-top: 4px; }
.meter { height: 8px; background: var(--bg-soft); border-radius: 999px; overflow: hidden; margin-top: 8px; border: 1px solid var(--border); }
.meter > div { height: 100%; background: var(--primary); }
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin: 16px 0; }
.panel h2 { margin: 0 0 12px; font-size: 19px; }
.table-wrap { overflow-x: auto; }
table.data { width: 100%; border-collapse: collapse; font-size: 14px; }
table.data th { text-align: start; font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); padding: 8px 10px; border-bottom: 1px solid var(--border); white-space: nowrap; }
table.data td { padding: 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
table.data tr.clickable { cursor: pointer; }
table.data tr.clickable:hover td { background: var(--bg-soft); }
input[type=text], input[type=email], input[type=tel], input[type=number], input[type=date], input[type=search], select, textarea {
  font: inherit; font-size: 15px; padding: 8px 10px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); color: var(--text); max-width: 100%;
}
textarea { width: 100%; }
.field { display: grid; gap: 4px; margin: 10px 0; }
.field > span { font-size: 13px; font-weight: 600; color: var(--muted); }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.toolbar { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin: 12px 0; }
.toolbar .spacer { flex: 1; }
.notice { padding: 12px 14px; border-radius: 12px; font-size: 15px; margin: 12px 0; }
.notice.ok { background: var(--ok-bg); color: var(--ok); }
.notice.warn { background: var(--warn-bg); color: var(--warn); }
.notice.bad { background: var(--danger-bg); color: var(--danger); }
.notice.info { background: var(--primary-soft); color: var(--primary-dark); }
.empty { text-align: center; padding: 40px 10px; color: var(--muted); }
.md { line-height: 1.65; }
.md h1, .md h2, .md h3 { margin: 18px 0 8px; font-size: 18px; }
.md ul, .md ol { padding-inline-start: 22px; }
dialog.modal { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); color: var(--text); width: min(640px, calc(100% - 32px)); padding: 22px; box-shadow: var(--shadow); }
dialog.modal::backdrop { background: rgb(10 12 30 / .45); }
dialog.modal h2 { margin-top: 0; }
.signin-box { max-width: 440px; margin: 10vh auto; text-align: center; }
.avatar { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; background: var(--primary-soft); }
.agree { max-height: 46vh; overflow: auto; border: 1px solid var(--border); border-radius: 10px; padding: 0 16px; margin: 12px 0; font-size: 14px; }

/* Class manager (shared with the extension) */
.btn-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.btn-row.end { justify-content: flex-end; }
.link-btn { background: none; border: 0; color: var(--primary); cursor: pointer; font: inherit; font-size: 14px; padding: 4px 8px; }
.hint { background: var(--warn-bg); color: var(--warn); padding: 8px 10px; border-radius: 10px; font-size: 14px; }
.chip { display: inline-block; background: var(--bg-soft); border: 1px solid var(--border); border-radius: 999px; padding: 2px 10px; font-size: 13px; }
.chip.ok { background: var(--ok-bg); color: var(--ok); border-color: transparent; }
.chip.bad { background: var(--danger-bg); color: var(--danger); border-color: transparent; }
.class-item { border-top: 1px solid var(--border); padding: 10px 0; }
.class-item summary { cursor: pointer; padding: 4px 0; }
table.students { width: 100%; border-collapse: collapse; margin-top: 8px; }
table.students th { text-align: start; font-size: 12px; color: var(--muted); font-weight: 600; padding: 4px; }
table.students td { padding: 3px 4px; }
table.students td:first-child { width: 32px; text-align: end; }
table.students td:last-child { width: 90px; text-align: end; }
table.students input[type="text"] { width: 100%; }
dialog.dialog { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); color: var(--text); width: min(640px, calc(100% - 32px)); padding: 22px; box-shadow: var(--shadow); }
dialog.dialog::backdrop { background: rgb(10 12 30 / .45); }
dialog.dialog h2 { margin-top: 0; }
dialog.dialog fieldset { border: 1px solid var(--border); border-radius: 10px; margin: 10px 0; padding: 8px 12px; }
dialog.dialog fieldset label { display: flex; gap: 8px; align-items: baseline; margin: 6px 0; }
dialog.dialog select { width: 100%; }
.imp-class { border-top: 1px solid var(--border); padding: 8px 0; }
.imp-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; align-items: flex-start; }
.imp-chips summary, .imp-invalid summary { list-style: none; cursor: pointer; }
.grid.three { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }

/* Audience + language */
.audience-toggle { display: inline-flex; background: var(--bg-soft); border: 1px solid var(--border); border-radius: 999px; padding: 4px; margin-bottom: 18px; }
.audience-toggle button { border: 0; background: none; font: inherit; font-weight: 600; font-size: 14px; padding: 7px 16px; border-radius: 999px; cursor: pointer; color: var(--muted); }
.audience-toggle button.active { background: var(--primary); color: var(--on-primary); }
.lang-select { font: inherit; font-size: 14px; padding: 5px 8px; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); color: var(--text); }
.center { text-align: center; }
.center .pricing { text-align: start; }
.end { text-align: end; }
.type-choice { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin-top: 20px; }
.type-option { display: flex; flex-direction: column; gap: 8px; text-align: start; cursor: pointer; font: inherit; color: var(--text); border: 2px solid var(--border); }
.type-option:hover { border-color: var(--primary); }
.type-option strong { font-size: 20px; }
[dir='rtl'] body { font-family: 'Plus Jakarta Sans', 'Noto Sans Arabic', 'Segoe UI', Tahoma, sans-serif; }
[dir='rtl'] .mock .rec, [dir='rtl'] .price { direction: ltr; unicode-bidi: isolate; }
.md table { border-collapse: collapse; width: 100%; margin: 10px 0; font-size: 14px; }
.md th, .md td { border: 1px solid var(--border); padding: 6px 8px; text-align: start; vertical-align: top; }
.md th { background: var(--bg-soft); }
input.invalid { border-color: var(--danger) !important; box-shadow: 0 0 0 3px var(--danger-bg); }
.ai-pick { max-height: 260px; overflow: auto; margin: 10px 0; }
.ai-pick label { display: flex; gap: 10px; align-items: flex-start; padding: 8px; border-radius: 8px; cursor: pointer; }
.ai-pick label:hover { background: var(--primary-soft); }
.ai-outputs { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 12px; margin: 8px 0; }
.check-inline { display: flex; gap: 8px; align-items: center; font-size: 14px; }