/* =========================================================================
   Aytict Academy — base stylesheet
   ========================================================================= */

:root {
    --accent: #2563eb;
    --bg: #0b1020;
    --bg-soft: #141a2e;
    --card: #1a2238;
    --card-2: #212b45;
    --text: #e8ecf6;
    --muted: #9aa6c2;
    --border: #2c374f;
    --good: #16a34a;
    --bad: #dc2626;
    --radius: 14px;
    --shadow: 0 10px 30px rgba(0, 0, 0, .35);
    --font: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --mono: "SF Mono", ui-monospace, "Cascadia Code", Consolas, Menlo, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: var(--font);
    color: var(--text);
    background:
        radial-gradient(1200px 600px at 80% -10%, rgba(37, 99, 235, .18), transparent 60%),
        radial-gradient(900px 500px at 0% 0%, rgba(124, 58, 237, .14), transparent 55%),
        var(--bg);
    line-height: 1.55;
}

.container { width: min(1140px, 92vw); margin-inline: auto; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.skip-link {
    position: absolute; left: -999px; top: 0; background: var(--accent);
    color: #fff; padding: 8px 14px; z-index: 100;
}
.skip-link:focus { left: 8px; top: 8px; }

.muted { color: var(--muted); }
.accent-text { color: var(--accent); }

/* -------------------------------------------------------------- header */
.site-header {
    position: sticky; top: 0; z-index: 50;
    backdrop-filter: blur(10px);
    background: rgba(11, 16, 32, .82);
    border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 0; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); font-weight: 800; font-size: 1.15rem; }
.brand:hover { text-decoration: none; }
.brand-logo { height: 28px; }
.brand-mark { color: var(--accent); font-size: 1.4rem; }
.site-nav { display: flex; gap: 6px; flex-wrap: wrap; }
.site-nav a { color: var(--muted); padding: 7px 12px; border-radius: 999px; font-size: .92rem; font-weight: 600; }
.site-nav a:hover { color: var(--text); background: var(--card); text-decoration: none; }

/* ---------------------------------------------------------------- hero */
.hero { text-align: center; padding: 70px 0 40px; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.4rem); line-height: 1.1; margin: 0 0 16px; letter-spacing: -.02em; }
.hero-sub { font-size: 1.15rem; color: var(--muted); max-width: 720px; margin: 0 auto 28px; }
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-top: 44px; }
.hero-stats div { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 26px; min-width: 110px; }
.hero-stats strong { display: block; font-size: 1.8rem; color: var(--accent); }
.hero-stats span { color: var(--muted); font-size: .85rem; }

/* -------------------------------------------------------------- buttons */
.btn {
    display: inline-block; cursor: pointer; font: inherit; font-weight: 700;
    border: 1px solid var(--border); border-radius: 10px; padding: 11px 20px;
    background: var(--card); color: var(--text); transition: transform .08s, background .15s, border-color .15s;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-ghost { background: transparent; }
.btn-small { padding: 7px 13px; font-size: .85rem; }

/* ----------------------------------------------------------- catalogue */
.catalogue { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; padding: 30px 0; }
.cat-card { background: var(--card); border: 1px solid var(--border); border-top: 4px solid var(--accent); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); }
.cat-card-head { display: flex; align-items: center; gap: 10px; }
.cat-card-head h2 { margin: 0; font-size: 1.3rem; }
.cat-icon { font-size: 1.6rem; }
.cat-blurb { color: var(--muted); font-size: .95rem; }
.cat-courses { list-style: none; padding: 0; margin: 14px 0; display: grid; gap: 6px; }
.cat-courses a { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: 9px; color: var(--text); background: var(--card-2); }
.cat-courses a:hover { background: var(--border); text-decoration: none; }
.course-icon { font-size: 1.1rem; }
.course-name { flex: 1; font-weight: 600; font-size: .95rem; }
.cat-more { font-weight: 700; font-size: .9rem; }

.badge { font-size: .72rem; font-weight: 700; background: var(--card-2); border: 1px solid var(--border); color: var(--muted); padding: 2px 8px; border-radius: 999px; white-space: nowrap; }
.badge-live { color: var(--accent); border-color: var(--accent); }

/* --------------------------------------------------------------- features */
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; padding: 20px 0 60px; }
.feature { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.feature span { font-size: 2rem; }
.feature h3 { margin: 10px 0 6px; }
.feature p { color: var(--muted); margin: 0; }

/* --------------------------------------------------------- page heads */
.breadcrumb { padding: 18px 0 0; color: var(--muted); font-size: .9rem; }
.breadcrumb a { color: var(--muted); }
.page-head { padding: 20px 0 26px; }
.page-head h1 { margin: 6px 0; font-size: clamp(1.8rem, 4vw, 2.6rem); display: flex; align-items: center; gap: 12px; }
.page-head p { color: var(--muted); max-width: 760px; }

.course-head { display: flex; align-items: flex-start; gap: 20px; }
.course-head-icon { font-size: 3rem; line-height: 1; }

/* ----------------------------------------------------------- course grid */
.course-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 18px; padding-bottom: 50px; }
.course-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; color: var(--text); display: flex; flex-direction: column; gap: 8px; transition: transform .1s, border-color .15s; }
.course-card:hover { transform: translateY(-3px); border-color: var(--accent); text-decoration: none; }
.course-card-icon { font-size: 2rem; }
.course-card h2 { margin: 0; font-size: 1.25rem; }
.course-card p { color: var(--muted); font-size: .92rem; margin: 0; flex: 1; }
.course-card-meta { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; color: var(--muted); font-size: .82rem; margin-top: 6px; }

/* ------------------------------------------------------------ course toc */
.course-toc { display: flex; gap: 8px; flex-wrap: wrap; position: sticky; top: 60px; z-index: 20; background: rgba(11,16,32,.8); backdrop-filter: blur(8px); padding: 10px 0; border-bottom: 1px solid var(--border); margin-bottom: 10px; }
.course-toc a { padding: 6px 14px; border-radius: 999px; background: var(--card); border: 1px solid var(--border); color: var(--muted); font-weight: 600; font-size: .88rem; }
.course-toc a:hover { color: var(--text); text-decoration: none; }

/* ------------------------------------------------------------- sections */
.course-section { padding: 26px 0; border-bottom: 1px solid var(--border); }
.section-title { font-size: 1.5rem; margin: 0 0 14px; }

.lesson { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 22px; margin-bottom: 16px; }
.lesson h3 { margin: 0 0 10px; display: flex; align-items: center; gap: 10px; }
.lesson-num { display: inline-grid; place-items: center; width: 28px; height: 28px; background: var(--accent); color: #fff; border-radius: 8px; font-size: .9rem; }
.lesson-body p { margin: .4em 0; }
.lesson-body code { background: var(--bg-soft); padding: 1px 6px; border-radius: 5px; font-family: var(--mono); font-size: .88em; }
.lesson-body ul { margin: .4em 0; }
.lesson-code { margin-top: 14px; }
.lesson-code pre { margin: 0 0 8px; background: #0c1326; border: 1px solid var(--border); border-radius: 10px; padding: 14px; overflow: auto; }
.lesson-code code { font-family: var(--mono); font-size: .85rem; color: #cfe0ff; }

/* ------------------------------------------------------------------ IDE */
.ide { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: #0c1326; }
.ide-toolbar { display: flex; align-items: center; justify-content: space-between; padding: 8px 12px; background: var(--card-2); border-bottom: 1px solid var(--border); }
.ide-lang { font-family: var(--mono); font-weight: 700; color: var(--accent); letter-spacing: .05em; }
.ide-actions { display: flex; gap: 8px; }
.ide-split { display: grid; grid-template-columns: 1fr 1fr; min-height: 320px; }
@media (max-width: 760px) { .ide-split { grid-template-columns: 1fr; } }
.ide-editor { border: 0; resize: vertical; padding: 14px; background: #0c1326; color: #d7e4ff; font-family: var(--mono); font-size: .9rem; line-height: 1.5; outline: none; min-height: 320px; tab-size: 2; }
.ide-output { border-left: 1px solid var(--border); display: flex; flex-direction: column; background: #fff; }
@media (max-width: 760px) { .ide-output { border-left: 0; border-top: 1px solid var(--border); } }
.ide-frame { width: 100%; flex: 1; border: 0; background: #fff; min-height: 160px; }
.ide-console { margin: 0; padding: 12px 14px; background: #0c1326; color: #9ff59f; font-family: var(--mono); font-size: .85rem; white-space: pre-wrap; overflow: auto; max-height: 220px; border-top: 1px solid var(--border); min-height: 60px; }
.ide-console.has-error { color: #ff9b9b; }
.ide-console:empty::before { content: "Output appears here after you press Run."; color: #64748b; }

/* ----------------------------------------------------------------- quiz */
.quiz-q { border: 1px solid var(--border); border-radius: 12px; padding: 14px 18px; margin: 0 0 14px; background: var(--card); }
.quiz-q legend { font-weight: 700; padding: 0 6px; }
.quiz-opt { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: 9px; cursor: pointer; }
.quiz-opt:hover { background: var(--card-2); }
.quiz-opt input { accent-color: var(--accent); width: 18px; height: 18px; }
.quiz-q.correct { border-color: var(--good); }
.quiz-q.incorrect { border-color: var(--bad); }
.quiz-result { margin-top: 16px; padding: 18px; border-radius: 12px; font-weight: 600; }
.quiz-result.pass { background: rgba(22,163,74,.15); border: 1px solid var(--good); }
.quiz-result.fail { background: rgba(220,38,38,.15); border: 1px solid var(--bad); }
.quiz-score { font-size: 2rem; display: block; }

/* ------------------------------------------------------- multi-page tasks */
.task-progress { display: flex; gap: 8px; margin-bottom: 6px; }
.task-dot { width: 22px; height: 6px; border-radius: 999px; background: var(--card-2); border: 1px solid var(--border); }
.task-dot.active { background: var(--accent); border-color: var(--accent); }
.task-dot.done { background: var(--good); border-color: var(--good); }
.task-count { color: var(--muted); font-size: .85rem; margin: 0 0 14px; }
.fill-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; padding: 6px 4px; }
.fill-fix { font-family: var(--mono); color: var(--muted); background: var(--bg-soft); padding: 4px 8px; border-radius: 6px; }
.fill-input { flex: 1; min-width: 160px; padding: 10px 12px; border-radius: 9px; border: 1px solid var(--border); background: var(--bg-soft); color: var(--text); font-family: var(--mono); font-size: .95rem; }
.fill-input:focus { outline: 2px solid var(--accent); border-color: var(--accent); }
.fill-hint { color: var(--muted); font-size: .85rem; margin: 6px 4px 0; }
.task-nav { display: flex; justify-content: space-between; gap: 10px; margin-top: 16px; }
.task-nav .btn-primary { margin-left: auto; }
.task-verdict { margin: 8px 4px 0; font-weight: 600; font-size: .9rem; }
.task-verdict.ok { color: #86efac; }
.task-verdict.no { color: #fca5a5; }
.task-verdict code { font-family: var(--mono); background: var(--bg-soft); padding: 1px 6px; border-radius: 5px; }

/* ---------------------------------------------------------- certificate */
.cert-locked { padding: 24px; background: var(--card); border: 1px dashed var(--border); border-radius: 12px; text-align: center; color: var(--muted); }
.cert-form { display: flex; gap: 10px; flex-wrap: wrap; margin: 14px 0; }
.cert-form input, #certName { flex: 1; min-width: 220px; padding: 11px 14px; border-radius: 10px; border: 1px solid var(--border); background: var(--bg-soft); color: var(--text); font: inherit; }
.cert-canvas { width: 100%; max-width: 720px; height: auto; margin: 18px 0; border-radius: 12px; border: 1px solid var(--border); display: none; background: #fff; }
.cert-canvas.show { display: block; }
.cert-download { display: flex; gap: 10px; flex-wrap: wrap; }

/* ------------------------------------------------------ language tracks */
.track { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 22px; margin-bottom: 18px; }
.track-head { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.track-icon { font-size: 2.2rem; }
.track-head h2 { margin: 0; font-size: 1.4rem; }
.track-head p { margin: 2px 0 0; font-size: .92rem; }
.track-levels { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 10px; }
.level-link { display: flex; flex-direction: column; gap: 4px; padding: 14px 16px; border-radius: 11px; background: var(--card-2); border: 1px solid var(--border); border-left: 4px solid var(--muted); color: var(--text); position: relative; }
.level-link:hover { text-decoration: none; transform: translateY(-2px); border-color: var(--accent); }
.level-link .level-name { font-weight: 800; }
.level-link .level-meta { font-size: .8rem; color: var(--muted); }
.level-link .level-go { position: absolute; right: 14px; top: 14px; color: var(--muted); }
.lvl-beginner { border-left-color: #16a34a; }
.lvl-intermediate { border-left-color: #2563eb; }
.lvl-advanced { border-left-color: #7c3aed; }
.lvl-professional { border-left-color: #d97706; }

.level-chip { font-size: .8rem; font-weight: 700; padding: 3px 12px; border-radius: 999px; vertical-align: middle; color: #fff; }
.level-chip.lvl-beginner { background: #16a34a; }
.level-chip.lvl-intermediate { background: #2563eb; }
.level-chip.lvl-advanced { background: #7c3aed; }
.level-chip.lvl-professional { background: #d97706; }
.badge-project { color: #d97706; border-color: #d97706; }

/* ------------------------------------------------------------- project */
.project-brief { background: var(--card); border: 1px solid var(--border); border-left: 4px solid #d97706; border-radius: var(--radius); padding: 18px 22px; margin-bottom: 16px; }
.project-brief h3 { margin: 0 0 8px; }
.project-brief h4 { margin: 14px 0 6px; }
.project-reqs { margin: 0; padding-left: 20px; }
.project-reqs li { margin: 4px 0; }
.project-ide { margin-bottom: 16px; }

.grade-report { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 22px; }
.grade-report.pass { border-color: var(--good); }
.grade-report.fail { border-color: var(--bad); }
.grade-overall { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; margin-bottom: 16px; }
.grade-score { font-size: 2.6rem; font-weight: 800; }
.grade-report.pass .grade-score { color: var(--good); }
.grade-report.fail .grade-score { color: var(--bad); }
.grade-verdict { font-weight: 600; }
.grade-axis { margin: 12px 0; }
.grade-axis-head { display: flex; justify-content: space-between; font-size: .92rem; margin-bottom: 5px; }
.grade-axis-head small { color: var(--muted); }
.grade-track { height: 10px; border-radius: 999px; background: var(--card-2); overflow: hidden; }
.grade-track span { display: block; height: 100%; border-radius: 999px; transition: width .5s; }
.grade-detail { margin: 6px 0 4px; }
.grade-detail summary { cursor: pointer; color: var(--muted); font-size: .88rem; }
.grade-fb { list-style: none; padding: 8px 0 0; margin: 0; font-size: .9rem; }
.grade-fb li { padding: 3px 0; }
.grade-fb li.ok { color: #86efac; }
.grade-fb li.no { color: #fca5a5; }

/* ----------------------------------------------------------- account nav */
.site-account { display: flex; align-items: center; gap: 10px; }
.site-account a { color: var(--muted); font-weight: 600; font-size: .9rem; }
.site-account a.btn { color: var(--text); }
.site-account a.btn-primary { color: #fff; }

/* ------------------------------------------------------------ auth & forms */
.auth-card { max-width: 460px; margin: 24px auto 60px; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; }
.auth-card h1 { margin-top: 0; }
.auth-form { display: grid; gap: 14px; margin: 16px 0; }
.auth-form label { display: grid; gap: 6px; font-weight: 600; font-size: .92rem; }
.auth-form input { padding: 11px 14px; border-radius: 10px; border: 1px solid var(--border); background: var(--bg-soft); color: var(--text); font: inherit; }
.auth-form .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 420px) { .auth-form .form-row { grid-template-columns: 1fr; } }
.auth-form input:focus { outline: 2px solid var(--accent); border-color: var(--accent); }
.form-error { background: rgba(220,38,38,.15); border: 1px solid var(--bad); border-radius: 10px; padding: 10px 14px; margin: 8px 0; font-size: .92rem; }

.verify-result { margin-top: 18px; padding: 18px; border-radius: 12px; }
.verify-result.valid { background: rgba(22,163,74,.15); border: 1px solid var(--good); }
.verify-result.invalid { background: rgba(220,38,38,.15); border: 1px solid var(--bad); }
.verify-result h2 { margin: 0 0 8px; }

/* ----------------------------------------------------------- data tables */
.data-table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.data-table th, .data-table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
.data-table th { color: var(--muted); font-size: .82rem; text-transform: uppercase; letter-spacing: .04em; }
.data-table code { font-family: var(--mono); background: var(--bg-soft); padding: 1px 6px; border-radius: 5px; }
.pill { display: inline-block; font-size: .76rem; font-weight: 700; padding: 2px 10px; border-radius: 999px; background: var(--card-2); border: 1px solid var(--border); color: var(--muted); }
.pill.pass { background: rgba(22,163,74,.18); border-color: var(--good); color: #86efac; }

/* --------------------------------------------------------------- admin */
.admin-ok { background: rgba(22,163,74,.15); border: 1px solid var(--good); border-radius: 10px; padding: 10px 14px; margin: 8px 0; }
.admin-actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.inline { display: inline; margin: 0; }
.admin-actions select { padding: 5px 8px; border-radius: 8px; background: var(--bg-soft); color: var(--text); border: 1px solid var(--border); font: inherit; }
.btn-danger { background: transparent; border-color: var(--bad); color: #fca5a5; }
.btn-danger:hover { background: rgba(220,38,38,.15); }
.setting-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; }
.setting-row p { margin: 4px 0 0; }
.setting-state { display: flex; align-items: center; gap: 12px; }

/* --------------------------------------------------------------- prose */
.prose { max-width: 760px; padding-bottom: 50px; }
.prose code { background: var(--bg-soft); padding: 1px 6px; border-radius: 5px; font-family: var(--mono); }

/* -------------------------------------------------------------- footer */
.site-footer { border-top: 1px solid var(--border); margin-top: 30px; background: var(--bg-soft); }
.footer-inner { display: flex; flex-wrap: wrap; gap: 20px; justify-content: space-between; align-items: center; padding: 30px 0; }
.footer-inner p { color: var(--muted); margin: 4px 0 0; }
.footer-stats { display: flex; gap: 16px; color: var(--muted); font-size: .9rem; }
.footer-copy { width: 100%; color: var(--muted); font-size: .82rem; border-top: 1px solid var(--border); padding-top: 14px; margin: 0; }