/* mygeeg components — shared by student, admin and public pages. Tokens live in style.css. */

/* ---------- Layout shells ---------- */
.page-wrap { max-width: 1040px; margin: 0 auto; padding: 36px 24px 64px; }
.topbar {
  position: sticky; top: 0; z-index: 40; display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 12px clamp(16px, 4vw, 40px); background: color-mix(in srgb, var(--surface) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(12px); border-bottom: 1px solid var(--border);
}
.topbar .auth-brand { margin: 0; }
.topbar nav { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; }
.topbar nav a {
  color: var(--text-dim); font-size: .9rem; font-weight: 550; padding: 7px 12px; border-radius: 999px;
}
.topbar nav a:hover { color: var(--text); background: var(--surface-2); text-decoration: none; }
.topbar nav a.active { color: var(--primary); background: var(--grad-soft); }

.theme-toggle {
  width: 36px; height: 36px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface);
  color: var(--text-dim); cursor: pointer; display: inline-grid; place-items: center; font-size: 15px; padding: 0;
}
.theme-toggle:hover { color: var(--text); border-color: var(--border-strong); }

.admin-wrap { display: flex; min-height: 100vh; }
.admin-nav {
  width: 244px; flex-shrink: 0; background: var(--surface); border-right: 1px solid var(--border);
  padding: 20px 14px; position: sticky; top: 0; height: 100vh; overflow-y: auto;
}
.admin-nav .nav-group { font-size: .68rem; text-transform: uppercase; letter-spacing: .09em; color: var(--text-dim); margin: 20px 10px 6px; font-weight: 700; }
.admin-nav a.nav-item, .admin-nav > a {
  display: flex; align-items: center; gap: 10px; color: var(--text-dim); padding: 9px 12px; border-radius: 10px;
  font-size: .9rem; font-weight: 550; margin-bottom: 2px;
}
.admin-nav a:hover { background: var(--surface-2); color: var(--text); text-decoration: none; }
.admin-nav a.active { background: var(--grad-soft); color: var(--primary); }
.admin-nav .nav-ico { width: 18px; text-align: center; opacity: .9; }
.admin-nav .nav-badge { margin-left: auto; background: var(--primary); color: var(--on-primary); border-radius: 999px; padding: 0 7px; font-size: .7rem; font-weight: 700; line-height: 1.6; }
.admin-main { flex: 1; min-width: 0; padding: 36px clamp(20px, 4vw, 48px) 64px; max-width: 1180px; }
.admin-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; flex-wrap: wrap; margin-bottom: 8px; }

/* ---------- Surfaces ---------- */
.card, .create-box {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px;
  box-shadow: var(--shadow-sm);
}
.create-box { margin-top: 28px; }
.muted { color: var(--text-dim); }
.mt { margin-top: 24px; }
.tag { font-size: .7rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: .07em; font-weight: 700; }
.row { display: flex; gap: 12px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.stack > * + * { margin-top: 12px; }

/* ---------- Buttons (variants) ---------- */
.btn-sm { padding: 8px 14px; font-size: .84rem; width: auto; box-shadow: none; border-radius: 9px; }
.btn-inline { display: inline-flex; width: auto; text-decoration: none; }
.btn-ghost { background: transparent; border: 1px solid var(--border-strong); color: var(--text); box-shadow: none; }
.btn-ghost:hover { background: var(--surface-2); color: var(--text); }
.btn-danger { background: var(--danger-c); color: #fff; box-shadow: none; }
.btn-success { background: var(--success); color: #fff; box-shadow: none; }
.btn-lg { padding: 14px 26px; font-size: 1rem; border-radius: 12px; }
form.inline { display: inline; margin-right: 6px; }

/* ---------- Pills / badges ---------- */
.pill { padding: 3px 10px; border-radius: 999px; font-size: .72rem; font-weight: 650; display: inline-block; margin-right: 4px; line-height: 1.5; }
.pill-on    { background: color-mix(in srgb, var(--success) 14%, transparent); color: var(--success); }
.pill-off   { background: color-mix(in srgb, var(--danger-c) 14%, transparent); color: var(--danger-c); }
.pill-draft { background: var(--surface-2); color: var(--text-dim); }
.pill-ai    { background: var(--grad-soft); color: var(--primary); border: 1px solid color-mix(in srgb, var(--primary) 30%, transparent); }
.pill-warn  { background: color-mix(in srgb, var(--warning) 16%, transparent); color: var(--warning); }
.badge-count { background: var(--primary); color: var(--on-primary); border-radius: 999px; padding: 0 7px; font-size: .7rem; font-weight: 700; margin-left: 4px; }

/* ---------- Tables ---------- */
.table-scroll { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); margin-top: 14px; }
.table-scroll table { margin-top: 0; }
table { width: 100%; border-collapse: collapse; margin-top: 14px; }
th, td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--border); font-size: .9rem; vertical-align: middle; }
th { color: var(--text-dim); font-weight: 650; font-size: .74rem; text-transform: uppercase; letter-spacing: .06em; background: var(--surface-2); }
tr:last-child td { border-bottom: 0; }
tbody tr:hover td, table tr:hover td { background: color-mix(in srgb, var(--surface-2) 55%, transparent); }
.card table { margin-top: 8px; }

/* ---------- Stats ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 14px; margin: 22px 0; }
.stat-box { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow-sm); }
.stat-box .num { font-size: 1.9rem; font-weight: 800; letter-spacing: -.03em; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; line-height: 1.15; }
.stat-box .label { font-size: .8rem; color: var(--text-dim); margin-top: 4px; }

/* ---------- Progress ---------- */
.progress-track { background: var(--surface-2); border-radius: 999px; height: 8px; overflow: hidden; border: 1px solid var(--border); }
.progress-fill { background: var(--grad); height: 100%; border-radius: 999px; transition: width .4s ease; }
.hero-progress { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }
.hero-progress .big { font-size: 3rem; font-weight: 800; letter-spacing: -.04em; line-height: 1; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-progress .bar { flex: 1; min-width: 200px; }

/* ---------- Course cards ---------- */
.course-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 18px; margin-top: 16px; }
.course-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px;
  display: flex; flex-direction: column; transition: transform .15s, box-shadow .15s, border-color .15s; box-shadow: var(--shadow-sm);
}
.course-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--border-strong); }
.course-card h3 { font-size: 1.08rem; margin: 6px 0; }
.course-card p { flex: 1; font-size: .9rem; }
.course-card .btn { align-self: flex-start; }
.course-cover { display: block; width: calc(100% + 40px); max-width: none; height: 160px; object-fit: cover; margin: -20px -20px 16px; border-radius: var(--radius) var(--radius) 0 0; background: var(--surface-2); }
.course-cover-detail { width: 100%; max-width: 100%; height: auto; max-height: 360px; aspect-ratio: 16 / 7; margin: 0 0 20px; border-radius: var(--radius); }

/* Generated cover for courses with no image: gradient + language glyph */
.cover-gen {
  width: calc(100% + 40px); margin: -20px -20px 16px; height: 120px; border-radius: var(--radius) var(--radius) 0 0;
  display: flex; align-items: flex-end; justify-content: space-between; padding: 14px 16px; color: #fff; position: relative; overflow: hidden;
  background: var(--cover, var(--grad));
}
.cover-gen::before { content: ""; position: absolute; inset: 0; background: radial-gradient(260px 120px at 85% -10%, rgba(255,255,255,.28), transparent 60%); }
.cover-gen .glyph { position: relative; font-family: var(--font-mono); font-weight: 800; font-size: 2rem; letter-spacing: -.04em; text-shadow: 0 2px 12px rgba(0,0,0,.25); }
.cover-gen .lvl { position: relative; font-size: .68rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; background: rgba(255,255,255,.2); padding: 3px 9px; border-radius: 999px; backdrop-filter: blur(4px); }

/* ---------- Lessons ---------- */
.lesson-layout { max-width: 820px; margin: 0 auto; }
.lesson-body { line-height: 1.75; font-size: 1.02rem; }
.lesson-body h2 { margin-top: 1.8em; padding-top: .4em; font-size: 1.4rem; }
.lesson-body h3 { margin-top: 1.5em; font-size: 1.15rem; }
.lesson-body ul, .lesson-body ol { padding-left: 1.4em; }
.lesson-body li { margin: .3em 0; }
.lesson-body img { max-width: 100%; height: auto; border-radius: var(--radius-sm); }
.lesson-body blockquote { margin: 1.2em 0; padding: 12px 18px; border-left: 4px solid var(--primary); background: var(--grad-soft); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.lesson-body blockquote p:last-child { margin-bottom: 0; }
.lesson-body table { margin: 1em 0; }
.lesson-body details { margin: 1em 0; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--surface-2); }
.lesson-body summary { cursor: pointer; padding: 11px 16px; font-weight: 650; color: var(--primary); list-style: none; }
.lesson-body summary::-webkit-details-marker { display: none; }
.lesson-body summary::before { content: "▸"; display: inline-block; margin-right: 8px; transition: transform .15s; }
.lesson-body details[open] > summary::before { transform: rotate(90deg); }
.lesson-body details[open] > summary { border-bottom: 1px solid var(--border); }
.lesson-body details > :not(summary) { margin-left: 16px; margin-right: 16px; }
.lesson-body details > :last-child { margin-bottom: 14px; }
.lesson-body details > summary + * { margin-top: 12px; }

pre { margin: 0; }
.lesson-body pre, .code-example pre {
  background: var(--code-bg); color: var(--code-fg); padding: 18px 20px; border-radius: var(--radius-sm); overflow-x: auto;
  font-size: .86rem; line-height: 1.65; border: 1px solid rgba(255,255,255,.06); tab-size: 4;
}
.lesson-body pre { margin: 1.2em 0; }
.lesson-body pre code, .code-example pre code { background: none; border: 0; padding: 0; font-size: inherit; color: inherit; }
.code-example { margin: 22px 0; }
.code-example .caption { font-size: .82rem; color: var(--text-dim); margin-bottom: 8px; font-weight: 550; }
.code-wrap { position: relative; }
.code-wrap .copy-btn {
  position: absolute; top: 10px; right: 10px; background: rgba(255,255,255,.08); color: #c9cdf0; border: 1px solid rgba(255,255,255,.14);
  border-radius: 8px; font-size: .72rem; padding: 4px 10px; cursor: pointer; font-family: var(--font-body); opacity: 0; transition: opacity .15s;
}
.code-wrap:hover .copy-btn, .copy-btn:focus-visible { opacity: 1; }
.code-wrap .lang-chip { position: absolute; bottom: 8px; right: 12px; font-size: .64rem; text-transform: uppercase; letter-spacing: .08em; color: #7f86b5; font-family: var(--font-mono); pointer-events: none; }
/* syntax tokens */
.tok-k { color: #c4a7ff; } .tok-s { color: #8be0b0; } .tok-c { color: #6c749e; font-style: italic; }
.tok-n { color: #ffb86b; } .tok-f { color: #7cc4ff; } .tok-p { color: #9aa3d6; }

.video-frame { position: relative; aspect-ratio: 16 / 9; background: #000; border-radius: var(--radius); overflow: hidden; }
.video-frame iframe, .video-frame video { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.diagram-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; margin-top: 14px; }
.diagram-grid img { width: 100%; height: auto; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--surface-2); }
.lesson-row { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 12px 0; border-top: 1px solid var(--border); }
.module-card .module-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 6px; }
.check { display: inline-block; width: 20px; color: var(--success); font-weight: 800; }
.next-up { border: 1px solid color-mix(in srgb, var(--primary) 45%, var(--border)); background: linear-gradient(180deg, var(--grad-soft), var(--surface)); }
.next-up h2 { margin-bottom: 4px; }

/* Audio player */
.audio-player { display: grid; gap: 12px; }
.audio-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.audio-setting { display: flex; align-items: center; gap: 8px; color: var(--text-dim); font-size: .8rem; }
.audio-setting select { width: auto; min-width: 90px; padding: 7px 9px; font-size: .8rem; }
.audio-status { margin: 0; font-size: .8rem; }

/* ---------- Learning path track ---------- */
.track { list-style: none; margin: 18px 0 0; padding: 0; }
.track li { position: relative; padding: 0 0 26px 46px; }
.track li::before { content: ""; position: absolute; left: 14px; top: 30px; bottom: 0; width: 2px; background: var(--border-strong); }
.track li:last-child { padding-bottom: 0; }
.track li:last-child::before { display: none; }
.track .dot { position: absolute; left: 0; top: 0; width: 30px; height: 30px; border-radius: 50%; border: 2px solid var(--border-strong); background: var(--surface); display: grid; place-items: center; font-size: .78rem; font-weight: 700; color: var(--text-dim); }
.track .done .dot { background: var(--success); border-color: var(--success); color: #fff; }
.track .done::before { background: var(--success); }
.track .current .dot { border-color: var(--primary); color: var(--primary); box-shadow: var(--ring); }
.track .end .dot { background: var(--grad); border-color: transparent; color: #fff; }
.path-step { display: flex; align-items: center; gap: 10px; padding: 6px 0; }

/* ---------- Quiz ---------- */
.quiz-q { margin-bottom: 18px; }
.quiz-q label { display: block; padding: 10px 14px; margin: 6px 0; border: 1px solid var(--border); border-radius: var(--radius-sm); cursor: pointer; background: var(--surface); transition: border-color .12s, background .12s; }
.quiz-q label:hover { border-color: var(--primary); background: var(--grad-soft); }
.quiz-result-ok { border-color: var(--success); }
.quiz-result-bad { border-color: var(--danger-c); }
.cert-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 12px; }
.alert a { text-decoration: underline; }

/* ---------- Public marketing pages ---------- */
.public-topbar {
  position: sticky; top: 0; z-index: 50; display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding: 12px clamp(18px, 5vw, 72px); background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: saturate(1.4) blur(14px); border-bottom: 1px solid var(--border);
}
.public-topbar .auth-brand { margin: 0; }
.public-topbar nav { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.public-topbar nav > a:not(.btn) { color: var(--text-dim); font-weight: 550; font-size: .92rem; padding: 7px 12px; border-radius: 999px; }
.public-topbar nav > a:not(.btn):hover { color: var(--text); background: var(--surface-2); text-decoration: none; }

.hero {
  position: relative; overflow: hidden; padding: clamp(56px, 9vw, 112px) clamp(18px, 5vw, 72px) clamp(48px, 7vw, 88px);
  background:
    radial-gradient(900px 480px at 15% -10%, rgba(37,99,235,.20), transparent 60%),
    radial-gradient(700px 420px at 95% 10%, rgba(56,189,248,.16), transparent 60%);
}
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(300px, .95fr); gap: clamp(28px, 5vw, 72px); align-items: center; max-width: 1240px; margin: 0 auto; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px; border: 1px solid var(--border-strong); border-radius: 999px; background: var(--surface); font-size: .8rem; font-weight: 600; color: var(--text-dim); box-shadow: var(--shadow-sm); }
.eyebrow i { width: 8px; height: 8px; border-radius: 50%; background: var(--success); box-shadow: 0 0 0 4px color-mix(in srgb, var(--success) 25%, transparent); }
.hero h1 { font-size: clamp(2.3rem, 1.4rem + 3.6vw, 4rem); line-height: 1.04; letter-spacing: -.045em; margin: 20px 0 18px; }
.grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: 1.15rem; color: var(--text-dim); max-width: 54ch; margin-bottom: 28px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 28px; margin-top: 40px; }
.hero-stats div b { display: block; font-size: 1.6rem; letter-spacing: -.03em; }
.hero-stats div span { font-size: .82rem; color: var(--text-dim); }

.editor { background: var(--code-bg); border-radius: var(--radius-lg); border: 1px solid rgba(255,255,255,.08); box-shadow: var(--shadow-lg); overflow: hidden; color: var(--code-fg); transform: rotate(1.2deg); }
.editor-bar { display: flex; align-items: center; gap: 7px; padding: 12px 16px; border-bottom: 1px solid rgba(255,255,255,.07); background: rgba(255,255,255,.03); }
.editor-bar i { width: 11px; height: 11px; border-radius: 50%; background: #ff5f57; } .editor-bar i:nth-child(2) { background: #febc2e; } .editor-bar i:nth-child(3) { background: #28c840; }
.editor-bar span { margin-left: 10px; font-size: .75rem; color: #7f86b5; font-family: var(--font-mono); }
.editor pre { padding: 20px 22px; font-size: .88rem; line-height: 1.75; overflow-x: auto; }
.editor .out { border-top: 1px dashed rgba(255,255,255,.12); padding: 14px 22px; font-family: var(--font-mono); font-size: .82rem; color: #8be0b0; background: rgba(52,211,160,.05); }

.section { padding: clamp(48px, 7vw, 88px) clamp(18px, 5vw, 72px); }
.section-alt { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-inner { max-width: 1240px; margin: 0 auto; }
.section-title { text-align: center; max-width: 640px; margin: 0 auto 40px; }
.section-title h2 { font-size: clamp(1.7rem, 1.2rem + 1.8vw, 2.5rem); letter-spacing: -.035em; }
.section-title p { color: var(--text-dim); }

.lang-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 12px; }
.lang-chip-card { display: flex; align-items: center; gap: 12px; padding: 14px 16px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); font-weight: 650; font-size: .93rem; color: var(--text); transition: transform .15s, border-color .15s, box-shadow .15s; }
.lang-chip-card:hover { transform: translateY(-2px); border-color: var(--primary); box-shadow: var(--shadow-md); text-decoration: none; }
.lang-chip-card .ico { width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center; color: #fff; font-family: var(--font-mono); font-weight: 800; font-size: .8rem; background: var(--cover, var(--grad)); flex-shrink: 0; }
.lang-chip-card small { display: block; color: var(--text-dim); font-weight: 500; font-size: .74rem; }

.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 18px; }
.feature { padding: 26px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); }
.section-alt .feature { background: var(--bg); }
.feature .ico { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: var(--grad-soft); color: var(--primary); font-size: 1.2rem; margin-bottom: 14px; border: 1px solid color-mix(in srgb, var(--primary) 25%, transparent); }
.feature h3 { margin-bottom: 6px; } .feature p { color: var(--text-dim); font-size: .93rem; margin: 0; }

.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; counter-reset: s; }
.step { position: relative; padding: 26px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); counter-increment: s; }
.step::before { content: counter(s); display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--grad); color: #fff; font-weight: 800; margin-bottom: 14px; }
.step h3 { margin-bottom: 4px; } .step p { margin: 0; color: var(--text-dim); font-size: .92rem; }

.public-section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; max-width: 1240px; margin: 0 auto 22px; }
.public-section-head h2 { margin: 4px 0 0; }
.public-course-grid { max-width: 1240px; margin: 0 auto; }
.public-course-meta { color: var(--text-dim); font-size: .82rem; margin: 6px 0 14px; }
.public-catalog { padding: clamp(48px, 7vw, 88px) clamp(18px, 5vw, 72px); }
.filter-bar { max-width: 1240px; margin: 0 auto 22px; display: flex; gap: 8px; flex-wrap: wrap; }
.filter-bar button { padding: 8px 16px; border-radius: 999px; border: 1px solid var(--border-strong); background: var(--surface); color: var(--text-dim); cursor: pointer; font-size: .86rem; font-weight: 600; font-family: inherit; }
.filter-bar button:hover { color: var(--text); }
.filter-bar button.on { background: var(--primary); color: var(--on-primary); border-color: transparent; }

.cta-band { max-width: 1000px; margin: 0 auto; text-align: center; padding: clamp(36px, 6vw, 64px) 28px; border-radius: 24px; background: var(--grad); color: #fff; box-shadow: var(--shadow-lg); }
.cta-band h2 { color: #fff; font-size: clamp(1.7rem, 1.2rem + 1.8vw, 2.5rem); }
.cta-band p { opacity: .9; max-width: 52ch; margin: 0 auto 24px; }
.cta-band .btn { background: #fff; color: #1e40af; box-shadow: 0 10px 24px -10px rgba(0,0,0,.5); }

.faq details { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); margin-bottom: 10px; }
.faq summary { cursor: pointer; padding: 16px 20px; font-weight: 650; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.faq summary::after { content: "+"; color: var(--primary); font-size: 1.3rem; line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq details p { padding: 0 20px 18px; margin: 0; color: var(--text-dim); }

.public-footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; padding: 28px clamp(18px, 5vw, 72px); color: var(--text-dim); font-size: .85rem; border-top: 1px solid var(--border); }

/* ---------- AI Studio (admin) ---------- */
.ai-hero { border: 1px solid color-mix(in srgb, var(--primary) 35%, var(--border)); background: linear-gradient(135deg, var(--grad-soft), var(--surface)); border-radius: var(--radius-lg); padding: 24px; }
.queue-item { display: flex; align-items: center; gap: 14px; padding: 12px 0; border-top: 1px solid var(--border); }
.queue-item:first-child { border-top: 0; }
.queue-item .grow { flex: 1; min-width: 0; }
.queue-item .title { font-weight: 650; }
.review-card { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); padding: 20px; margin-top: 16px; box-shadow: var(--shadow-sm); }
.review-meta { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: .84rem; color: var(--text-dim); margin: 8px 0 14px; }
.review-meta b { color: var(--text); }
.log-box { background: var(--code-bg); color: #b9f3d3; font-family: var(--font-mono); font-size: .78rem; border-radius: var(--radius-sm); padding: 14px 16px; max-height: 260px; overflow: auto; white-space: pre-wrap; line-height: 1.6; }
.spinner { width: 14px; height: 14px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; display: inline-block; animation: spin .7s linear infinite; vertical-align: -2px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .editor { transform: none; }
}
@media (max-width: 760px) {
  .admin-wrap { flex-direction: column; }
  .admin-nav { width: 100%; height: auto; position: static; display: flex; flex-wrap: wrap; gap: 4px; padding: 12px; border-right: 0; border-bottom: 1px solid var(--border); }
  .admin-nav .nav-group { display: none; }
  .admin-main { padding: 22px 16px 48px; }
  .page-wrap { padding: 22px 16px 48px; }
  .topbar nav { gap: 0; }
  .topbar nav a { padding: 6px 9px; font-size: .84rem; }
  .public-section-head { align-items: flex-start; }
  .hero-progress .big { font-size: 2.4rem; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; scroll-behavior: auto !important; } }
@media print { .topbar, .admin-nav, .theme-toggle { display: none !important; } }


/* =====================================================================
   MODERN + MOTION LAYER (blue & white edition)
   Everything below is additive. Motion respects prefers-reduced-motion
   (see the global rule at the very end of this file).
   ===================================================================== */

/* ---------- Entrance + reveal ---------- */
@keyframes fadeUp   { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
@keyframes fadeIn   { from { opacity: 0; } to { opacity: 1; } }
@keyframes popIn    { from { opacity: 0; transform: scale(.96) translateY(10px); } to { opacity: 1; transform: none; } }
@keyframes floatY   { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
@keyframes floatY2  { 0%, 100% { transform: translateY(0) rotate(-1deg); } 50% { transform: translateY(10px) rotate(1deg); } }
@keyframes drift1   { 0%, 100% { transform: translate(0,0) scale(1); } 50% { transform: translate(60px,40px) scale(1.12); } }
@keyframes drift2   { 0%, 100% { transform: translate(0,0) scale(1); } 50% { transform: translate(-70px,30px) scale(1.18); } }
@keyframes gradShift{ 0% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } 100% { background-position: 0% 50%; } }
@keyframes shimmer  { to { background-position: 200% 0; } }
@keyframes pulseDot { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--success) 55%, transparent); } 100% { box-shadow: 0 0 0 10px transparent; } }
@keyframes pulseRing{ 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--primary) 45%, transparent); } 100% { box-shadow: 0 0 0 12px transparent; } }
@keyframes marquee  { to { transform: translateX(-50%); } }
@keyframes fillIn   { from { width: 0; } }
@keyframes blink    { 50% { opacity: 0; } }
@keyframes sweep    { from { transform: translateX(-120%) skewX(-18deg); } to { transform: translateX(260%) skewX(-18deg); } }

/* Reveal-on-scroll: only hidden when JS is running (theme.js adds .js), so no-JS visitors still see everything. */
.js .reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1); transition-delay: var(--d, 0ms); }
.js .reveal.in { opacity: 1; transform: none; }

/* Page content fades up on every load */
.page-wrap > *, .admin-main > * { animation: fadeUp .55s cubic-bezier(.2,.7,.2,1) both; }
.page-wrap > *:nth-child(2), .admin-main > *:nth-child(2) { animation-delay: .05s; }
.page-wrap > *:nth-child(3), .admin-main > *:nth-child(3) { animation-delay: .10s; }
.page-wrap > *:nth-child(4), .admin-main > *:nth-child(4) { animation-delay: .15s; }
.page-wrap > *:nth-child(5), .admin-main > *:nth-child(5) { animation-delay: .20s; }
.page-wrap > *:nth-child(n+6), .admin-main > *:nth-child(n+6) { animation-delay: .25s; }

/* ---------- Page background: soft blue wash behind the app ---------- */
body { background:
    radial-gradient(1100px 520px at 85% -8%, rgba(56,189,248,.13), transparent 60%),
    radial-gradient(900px 520px at -5% 0%, rgba(37,99,235,.10), transparent 60%),
    var(--bg);
  background-attachment: fixed;
}
:root[data-theme="dark"] body { background:
    radial-gradient(1100px 520px at 85% -8%, rgba(37,99,235,.28), transparent 60%),
    radial-gradient(900px 520px at -5% 0%, rgba(56,189,248,.10), transparent 60%),
    var(--bg);
  background-attachment: fixed; }

/* ---------- Navigation ---------- */
.topbar, .public-topbar { transition: box-shadow .25s, background .25s; }
.topbar.is-scrolled, .public-topbar.is-scrolled { box-shadow: 0 10px 30px -18px rgba(29,78,216,.45); }
.topbar nav a, .public-topbar nav > a:not(.btn) { position: relative; transition: color .2s, background .2s; }
.topbar nav a.active { background: var(--primary); color: var(--on-primary); box-shadow: 0 6px 16px -8px rgba(37,99,235,.8); }
.topbar nav a.active:hover { background: var(--primary-hover); color: var(--on-primary); }
.public-topbar nav > a:not(.btn)::after { content: ""; position: absolute; left: 14px; right: 14px; bottom: 3px; height: 2px; border-radius: 2px; background: var(--grad); transform: scaleX(0); transform-origin: left; transition: transform .25s; }
.public-topbar nav > a:not(.btn):hover::after { transform: scaleX(1); }
.theme-toggle { transition: transform .35s, border-color .2s, color .2s, background .2s; }
.theme-toggle:hover { transform: rotate(25deg) scale(1.06); background: var(--surface-2); }

.brand-mark { transition: transform .35s cubic-bezier(.3,1.6,.5,1); }
.auth-brand:hover .brand-mark { transform: rotate(-8deg) scale(1.08); }

/* Admin sidebar */
.admin-nav { background: linear-gradient(180deg, var(--surface), color-mix(in srgb, var(--surface) 90%, var(--brand-100))); }
.admin-nav a.nav-item { position: relative; transition: background .2s, color .2s, transform .2s, padding .2s; }
.admin-nav a.nav-item:hover { transform: translateX(3px); }
.admin-nav a.active { background: var(--grad-soft); color: var(--primary); font-weight: 650; }
.admin-nav a.active::before { content: ""; position: absolute; left: -14px; top: 8px; bottom: 8px; width: 4px; border-radius: 0 4px 4px 0; background: var(--grad); }
.admin-nav .nav-badge { animation: pulseRing 1.8s ease-out infinite; }

/* ---------- Buttons ---------- */
.btn:not(.btn-ghost):not(.btn-danger):not(.btn-success) {
  background: var(--grad); background-size: 140% 140%; background-position: 0% 50%;
  box-shadow: 0 10px 22px -10px rgba(37,99,235,.75);
}
.btn { position: relative; overflow: hidden; isolation: isolate; }
.btn:not(.btn-ghost):not(.btn-danger):not(.btn-success):hover { background-position: 100% 50%; box-shadow: 0 14px 28px -10px rgba(37,99,235,.85); }
.btn::after { content: ""; position: absolute; top: 0; bottom: 0; left: 0; width: 38%; background: linear-gradient(90deg, transparent, rgba(255,255,255,.35), transparent); transform: translateX(-120%) skewX(-18deg); pointer-events: none; z-index: -1; }
.btn:hover::after { animation: sweep .8s ease; }
.btn-ghost { background: color-mix(in srgb, var(--surface) 70%, transparent); border-color: var(--border-strong); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); background: var(--surface); }
.btn-ghost::after { display: none; }
.btn-success { box-shadow: 0 10px 20px -10px color-mix(in srgb, var(--success) 80%, transparent); }
.btn-success:hover { filter: brightness(1.06); }
.btn-lg { border-radius: 14px; }

/* ---------- Surfaces ---------- */
.card, .stat-box, .review-card, .course-card, .feature, .step, .lang-chip-card, .faq details { transition: transform .25s cubic-bezier(.2,.7,.2,1), box-shadow .25s, border-color .25s, background .25s; }
.card { border-radius: var(--radius-lg); }
.card:hover { border-color: color-mix(in srgb, var(--primary) 28%, var(--border)); }
.next-up { position: relative; overflow: hidden; }
.next-up::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 4px; background: var(--grad); }

.stat-box { position: relative; overflow: hidden; border-radius: var(--radius-lg); }
.stat-box::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 3px; background: var(--grad); transform: scaleX(.25); transform-origin: left; transition: transform .5s cubic-bezier(.2,.7,.2,1); }
.stat-box:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.stat-box:hover::before { transform: scaleX(1); }

/* ---------- Progress ---------- */
.progress-track { height: 10px; background: color-mix(in srgb, var(--primary) 9%, var(--surface-2)); }
.progress-fill { position: relative; animation: fillIn 1.1s cubic-bezier(.2,.7,.2,1) both; background: var(--grad); }
.progress-fill::after { content: ""; position: absolute; inset: 0; border-radius: inherit; background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,.55) 50%, transparent 100%); background-size: 200% 100%; animation: shimmer 2.2s linear infinite; opacity: .6; }

/* ---------- Course cards ---------- */
.course-card { border-radius: var(--radius-lg); position: relative; overflow: hidden; }
.course-card:hover { transform: translateY(-6px); box-shadow: 0 24px 44px -22px rgba(29,78,216,.45); border-color: color-mix(in srgb, var(--primary) 45%, var(--border)); }
.course-card .cover-gen, .course-card .course-cover { border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
.cover-gen { height: 132px; }
.cover-gen::after { content: ""; position: absolute; top: 0; bottom: 0; left: 0; width: 40%; background: linear-gradient(90deg, transparent, rgba(255,255,255,.28), transparent); transform: translateX(-130%) skewX(-18deg); }
.course-card:hover .cover-gen::after { animation: sweep 1s ease; }
.cover-gen .glyph { transition: transform .4s cubic-bezier(.3,1.5,.5,1); }
.course-card:hover .cover-gen .glyph { transform: scale(1.15) rotate(-3deg); }

/* ---------- Lessons ---------- */
.lesson-body h2 { position: relative; padding-left: 16px; }
.lesson-body h2::before { content: ""; position: absolute; left: 0; top: .35em; bottom: .15em; width: 5px; border-radius: 5px; background: var(--grad); }
.lesson-body details { transition: border-color .2s, box-shadow .2s, background .2s; }
.lesson-body details[open] { border-color: color-mix(in srgb, var(--primary) 40%, var(--border)); box-shadow: var(--shadow-sm); background: var(--surface); }
.lesson-body details[open] > :not(summary) { animation: fadeUp .35s ease both; }
.lesson-body pre, .code-example pre { border-radius: 14px; box-shadow: 0 18px 36px -24px rgba(10,26,58,.7); }
.tok-k { color: #a5b4fc; } .tok-s { color: #86efac; } .tok-n { color: #fdba74; } .tok-f { color: #7dd3fc; } .tok-c { color: #6b7fa8; }

/* ---------- Learning path track ---------- */
.track .dot { transition: transform .25s, box-shadow .25s, background .25s; }
.track li:hover .dot { transform: scale(1.12); }
.track .current .dot { animation: pulseRing 2s ease-out infinite; background: var(--surface); }
.track .done::before { background: var(--grad); }

/* ---------- Quiz ---------- */
.quiz-q label { transition: transform .15s, border-color .15s, background .15s, box-shadow .15s; }
.quiz-q label:hover { transform: translateX(4px); box-shadow: var(--shadow-sm); }
.quiz-q input:checked + * , .quiz-q label:has(input:checked) { border-color: var(--primary); background: var(--grad-soft); }

/* ---------- Tables / pills / alerts ---------- */
th { background: color-mix(in srgb, var(--primary) 6%, var(--surface-2)); }
tbody tr, table tr { transition: background .15s; }
.pill { letter-spacing: .01em; }
.pill-ai { background: var(--grad); color: #fff; border: 0; box-shadow: 0 6px 14px -8px rgba(37,99,235,.9); }
.alert { animation: popIn .35s ease both; border-radius: var(--radius); }
.alert-info, .alert-success, .alert-error { backdrop-filter: blur(4px); }
input, select, textarea { transition: border-color .15s, box-shadow .15s, background .15s; }

/* ---------- AI Studio (admin) ---------- */
.ai-hero { position: relative; overflow: hidden; border: 0; background: var(--surface); box-shadow: var(--shadow-md); isolation: isolate; }
.ai-hero::before { content: ""; position: absolute; inset: 0; z-index: -2; background: linear-gradient(120deg, rgba(37,99,235,.16), rgba(56,189,248,.18), rgba(37,99,235,.10)); background-size: 220% 220%; animation: gradShift 9s ease infinite; }
.ai-hero::after { content: ""; position: absolute; inset: 1px; z-index: -1; border-radius: calc(var(--radius-lg) - 1px); background: color-mix(in srgb, var(--surface) 88%, transparent); }
.ai-hero .progress-track { height: 12px; }
.ai-hero .spinner { color: var(--primary); }
.queue-item { transition: background .2s, padding .2s; border-radius: 10px; }
.queue-item:hover { background: var(--surface-2); padding-left: 10px; padding-right: 10px; }
.review-card { border-radius: var(--radius-lg); position: relative; overflow: hidden; }
.review-card::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px; background: var(--grad); }
.review-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.review-meta span { background: var(--surface-2); border: 1px solid var(--border); padding: 3px 10px; border-radius: 999px; }
.log-box { background: var(--code-bg); color: #a7f3d0; border: 1px solid rgba(255,255,255,.06); }
.spinner { width: 16px; height: 16px; border-width: 2.5px; }

/* =====================================================================
   PUBLIC LANDING PAGE
   ===================================================================== */
.hero { background: none; isolation: isolate; }
.hero::before { content: ""; position: absolute; inset: 0; z-index: -3;
  background: linear-gradient(180deg, color-mix(in srgb, var(--brand-100) 55%, var(--bg)) 0%, var(--bg) 100%); }
:root[data-theme="dark"] .hero::before { background: linear-gradient(180deg, #0a1a3d 0%, var(--bg) 100%); }
.hero-grid-bg { position: absolute; inset: 0; z-index: -2; pointer-events: none;
  background-image: linear-gradient(var(--border) 1px, transparent 1px), linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 56px 56px; opacity: .55;
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 20%, transparent 75%); mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 20%, transparent 75%); }
.blob { position: absolute; z-index: -1; border-radius: 50%; filter: blur(70px); opacity: .55; pointer-events: none; will-change: transform; }
.blob.b1 { width: 460px; height: 460px; left: -120px; top: -100px; background: #3b82f6; animation: drift1 16s ease-in-out infinite; }
.blob.b2 { width: 420px; height: 420px; right: -80px; top: 40px; background: #38bdf8; animation: drift2 19s ease-in-out infinite; }
.blob.b3 { width: 360px; height: 360px; left: 38%; bottom: -160px; background: #2563eb; opacity: .35; animation: drift1 22s ease-in-out infinite reverse; }
:root[data-theme="dark"] .blob { opacity: .38; }

.eyebrow { background: color-mix(in srgb, var(--surface) 80%, transparent); backdrop-filter: blur(6px); border-color: color-mix(in srgb, var(--primary) 30%, var(--border)); }
.eyebrow i { animation: pulseDot 1.6s ease-out infinite; }
.hero h1 { animation: fadeUp .8s .05s cubic-bezier(.2,.7,.2,1) both; text-wrap: balance; min-height: 3.12em; }
@media (max-width: 900px) { .hero h1 { min-height: 0; } }
.hero p.lead { animation: fadeUp .8s .18s cubic-bezier(.2,.7,.2,1) both; }
.hero-cta { animation: fadeUp .8s .30s cubic-bezier(.2,.7,.2,1) both; }
.hero-stats { animation: fadeUp .8s .42s cubic-bezier(.2,.7,.2,1) both; }
.hero .eyebrow { animation: fadeUp .8s cubic-bezier(.2,.7,.2,1) both; }
.grad-text { background-image: linear-gradient(100deg, #1d4ed8, #3b82f6, #38bdf8, #2563eb); background-size: 250% 100%; animation: gradShift 6s ease infinite; }
:root[data-theme="dark"] .grad-text { background-image: linear-gradient(100deg, #5b9dff, #7dd3fc, #38bdf8, #5b9dff); background-size: 250% 100%; }
.rotator { display: inline-block; min-width: 1ch; position: relative; }
.rotator::after { content: ""; display: inline-block; width: .08em; height: .85em; margin-left: .06em; background: var(--primary); vertical-align: -.05em; animation: blink 1s steps(1) infinite; }

.hero-stats div b { font-size: 1.9rem; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* Floating editor with chips */
.hero-visual { position: relative; animation: popIn .9s .25s cubic-bezier(.2,.7,.2,1) both; }
.editor { transform: rotate(1.2deg); animation: floatY 7s ease-in-out infinite; background: linear-gradient(180deg, #0c1a3a, var(--code-bg)); border: 1px solid rgba(147,197,253,.18); }
.editor pre { min-height: 168px; }
.editor .out { min-height: 46px; transition: opacity .3s; }
.editor .caret { display: inline-block; width: .55em; height: 1.05em; background: #7dd3fc; vertical-align: -.2em; margin-left: 1px; animation: blink 1s steps(1) infinite; }
.chip-float { z-index: 3; position: absolute; display: inline-flex; align-items: center; gap: 8px; padding: 9px 14px; border-radius: 14px; background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow-md); font-size: .8rem; font-weight: 650; color: var(--text); white-space: nowrap; }
.chip-float .dot { width: 22px; height: 22px; border-radius: 7px; display: grid; place-items: center; color: #fff; font-size: .72rem; background: var(--grad); }
.chip-float.ok .dot { background: linear-gradient(135deg, #059669, #34d399); }
.chip-float.c1 { left: -30px; top: 62%; animation: floatY2 6s ease-in-out infinite; }
.chip-float.c2 { right: -14px; top: -16px; animation: floatY 5.5s .6s ease-in-out infinite; }
.chip-float.c3 { left: 8%; bottom: -22px; animation: floatY2 6.5s .3s ease-in-out infinite; }

/* Language marquee */
.marquee { overflow: hidden; border-block: 1px solid var(--border); background: color-mix(in srgb, var(--surface) 75%, transparent); backdrop-filter: blur(6px);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.marquee-track { display: flex; width: max-content; gap: 14px; padding: 16px 0; animation: marquee 38s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-item { display: inline-flex; align-items: center; gap: 10px; padding: 8px 16px 8px 10px; background: var(--surface); border: 1px solid var(--border); border-radius: 999px; font-weight: 650; font-size: .9rem; white-space: nowrap; }
.marquee-item .ico { width: 28px; height: 28px; border-radius: 9px; display: grid; place-items: center; color: #fff; font-family: var(--font-mono); font-size: .66rem; font-weight: 800; background: var(--cover, var(--grad)); }

/* Sections */
.section-title h2 { background: linear-gradient(180deg, var(--text), color-mix(in srgb, var(--text) 70%, var(--primary))); -webkit-background-clip: text; background-clip: text; color: transparent; }
.kicker { display: inline-block; margin-bottom: 10px; padding: 4px 12px; border-radius: 999px; background: var(--grad-soft); color: var(--primary); font-size: .74rem; font-weight: 750; letter-spacing: .08em; text-transform: uppercase; border: 1px solid color-mix(in srgb, var(--primary) 22%, transparent); }
.section-alt { background: linear-gradient(180deg, var(--surface), color-mix(in srgb, var(--surface) 92%, var(--brand-100))); }
:root[data-theme="dark"] .section-alt { background: var(--surface); }

.lang-chip-card:hover { transform: translateY(-4px) scale(1.02); }
.lang-chip-card .ico { transition: transform .3s cubic-bezier(.3,1.6,.5,1); }
.lang-chip-card:hover .ico { transform: rotate(-8deg) scale(1.12); }

.feature-grid { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.feature { position: relative; overflow: hidden; border-radius: var(--radius-lg); padding: 28px; }
.feature::before { content: ""; position: absolute; inset: -1px; border-radius: inherit; padding: 1px; background: var(--grad); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude; opacity: 0; transition: opacity .3s; pointer-events: none; }
.feature:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.feature:hover::before { opacity: 1; }
.feature .ico { transition: transform .35s cubic-bezier(.3,1.6,.5,1), background .25s, color .25s; }
.feature:hover .ico { transform: rotate(-8deg) scale(1.1); background: var(--grad); color: #fff; }

.steps { position: relative; }
.step { border-radius: var(--radius-lg); }
.step:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: color-mix(in srgb, var(--primary) 40%, var(--border)); }
.step::before { box-shadow: 0 8px 18px -8px rgba(37,99,235,.8); }

/* Stats band */
.stats-band { background: var(--grad-deep); color: #fff; padding: clamp(36px, 5vw, 56px) clamp(18px, 5vw, 72px); position: relative; overflow: hidden; }
.stats-band::before { content: ""; position: absolute; inset: 0; background: radial-gradient(500px 220px at 15% 0%, rgba(255,255,255,.16), transparent 60%), radial-gradient(500px 240px at 90% 100%, rgba(56,189,248,.35), transparent 60%); }
.stats-band-inner { position: relative; max-width: 1240px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 24px; text-align: center; }
.stats-band b { display: block; font-size: clamp(2rem, 1.4rem + 2.4vw, 3rem); letter-spacing: -.04em; line-height: 1.1; }
.stats-band span { opacity: .85; font-size: .9rem; }

/* Learning paths on landing */
.path-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; }
.path-card { display: flex; flex-direction: column; gap: 8px; padding: 24px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); color: var(--text); position: relative; overflow: hidden; transition: transform .25s, box-shadow .25s, border-color .25s; }
.path-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: var(--primary); text-decoration: none; }
.path-card .ico { width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center; color: #fff; font-family: var(--font-mono); font-weight: 800; background: var(--cover, var(--grad)); }
.path-card h3 { margin: 6px 0 0; }
.path-card p { margin: 0; color: var(--text-dim); font-size: .9rem; flex: 1; }
.path-card .go { color: var(--primary); font-weight: 700; font-size: .88rem; }
.path-card .go::after { content: "\2192"; display: inline-block; margin-left: .45em; transition: transform .25s; }
.path-card:hover .go::after { transform: translateX(5px); }

.cta-band { background: var(--grad-deep); background-size: 200% 200%; animation: gradShift 10s ease infinite; position: relative; overflow: hidden; }
.cta-band::before, .cta-band::after { content: ""; position: absolute; border-radius: 50%; filter: blur(40px); pointer-events: none; }
.cta-band::before { width: 280px; height: 280px; left: -60px; top: -90px; background: rgba(56,189,248,.45); animation: drift1 14s ease-in-out infinite; }
.cta-band::after { width: 240px; height: 240px; right: -50px; bottom: -90px; background: rgba(255,255,255,.22); animation: drift2 17s ease-in-out infinite; }
.cta-band > * { position: relative; z-index: 1; }
.cta-band .btn, .cta-band .btn:not(.btn-ghost):not(.btn-danger):not(.btn-success) { background: #fff; color: #1e40af; box-shadow: 0 14px 30px -12px rgba(0,0,0,.55); }
.cta-band .btn:hover, .cta-band .btn:not(.btn-ghost):not(.btn-danger):not(.btn-success):hover { background: #eff6ff; color: #1e3a8a; box-shadow: 0 18px 34px -12px rgba(0,0,0,.6); }
.cta-band .btn::after { background: linear-gradient(90deg, transparent, rgba(37,99,235,.25), transparent); }

.faq summary { transition: color .2s; }
.faq summary:hover { color: var(--primary); }
.faq details[open] { border-color: color-mix(in srgb, var(--primary) 40%, var(--border)); box-shadow: var(--shadow-sm); }
.faq details[open] p { animation: fadeUp .35s ease both; }
.faq summary::after { transition: transform .3s; }
.faq details[open] summary::after { transform: rotate(180deg); }

.filter-bar button { transition: all .2s; }
.filter-bar button:hover { transform: translateY(-1px); border-color: var(--primary); }
.filter-bar button.on { background: var(--grad); box-shadow: 0 8px 18px -10px rgba(37,99,235,.9); }
.course-card[hidden] { display: none; }
.course-card.show-in { animation: popIn .4s ease both; }

/* =====================================================================
   AUTH SCREENS: animated blue stage + glass card
   ===================================================================== */
.auth-shell { position: relative; overflow: hidden; isolation: isolate; }
.auth-shell::before, .auth-shell::after { content: ""; position: absolute; z-index: -1; border-radius: 50%; filter: blur(80px); pointer-events: none; }
.auth-shell::before { width: 520px; height: 520px; left: -140px; top: -140px; background: rgba(59,130,246,.45); animation: drift1 15s ease-in-out infinite; }
.auth-shell::after  { width: 480px; height: 480px; right: -120px; bottom: -140px; background: rgba(56,189,248,.45); animation: drift2 18s ease-in-out infinite; }
.auth-card { background: color-mix(in srgb, var(--surface) 88%, transparent); backdrop-filter: blur(16px) saturate(1.3); border-color: color-mix(in srgb, var(--primary) 18%, var(--border)); box-shadow: 0 40px 80px -40px rgba(29,78,216,.55), var(--shadow-sm); animation: popIn .6s cubic-bezier(.2,.7,.2,1) both; }
.auth-card h1 { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ---------- Responsive additions ---------- */
@media (max-width: 900px) {
  .chip-float.c1, .chip-float.c3 { display: none; }
  .chip-float.c2 { right: 8px; }
}
@media (max-width: 760px) {
  /* Public header on phones: keep logo, Log in, theme toggle and the main button; the section links live on the page itself. */
  .public-topbar nav > a:not(.btn):not([href="/auth/login.php"]) { display: none; }
  .public-topbar { gap: 8px; padding-left: 14px; padding-right: 14px; }
  .public-topbar nav { flex-wrap: nowrap; gap: 4px; }
  .public-topbar nav > a:not(.btn) { padding: 7px 8px; }
  .public-topbar .btn-sm { padding: 8px 12px; white-space: nowrap; }
  .admin-nav a.active::before { display: none; }
  .blob { opacity: .4; filter: blur(60px); }
}

/* ---------- Reduced motion: keep layout, drop movement ---------- */
@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1 !important; transform: none !important; }
  .marquee-track { animation: none !important; flex-wrap: wrap; width: auto; justify-content: center; }
}


/* ---------- Admin: "drafts waiting for review" banner ---------- */
.ai-callout { display: flex; align-items: center; gap: 16px; margin: 20px 0 4px; padding: 16px 20px; border-radius: var(--radius-lg); color: #fff; background: var(--grad-deep); background-size: 200% 200%; animation: gradShift 8s ease infinite, fadeUp .55s ease both; box-shadow: 0 22px 40px -22px rgba(29,78,216,.8); transition: transform .2s, box-shadow .2s; }
.ai-callout:hover { transform: translateY(-3px); box-shadow: 0 28px 46px -22px rgba(29,78,216,.95); text-decoration: none; color: #fff; }
.ai-callout-ico { width: 44px; height: 44px; flex-shrink: 0; display: grid; place-items: center; border-radius: 14px; background: rgba(255,255,255,.18); font-size: 1.3rem; animation: pulseRing 2s ease-out infinite; }
.ai-callout strong { display: block; font-size: 1.05rem; }
.ai-callout small { display: block; opacity: .85; font-size: .86rem; }
.ai-callout-go { margin-left: auto; font-weight: 700; white-space: nowrap; background: #fff; color: #1e40af; padding: 9px 16px; border-radius: 999px; }
@media (max-width: 600px) { .ai-callout { flex-wrap: wrap; } .ai-callout-go { margin-left: 0; } }


/* ---------- Lesson sections, colour-coded (tagged by motion.js) ---------- */
.lesson-body h2[data-kind="examples"]::before   { background: linear-gradient(180deg, #0ea5e9, #38bdf8); }
.lesson-body h2[data-kind="exercises"]::before  { background: linear-gradient(180deg, #059669, #34d399); }
.lesson-body h2[data-kind="assignment"]::before { background: linear-gradient(180deg, #d97706, #fbbf24); }
.lesson-body h2[data-kind="mistakes"]::before   { background: linear-gradient(180deg, #dc2626, #f87171); }
.lesson-body h2[data-kind="recap"]::before      { background: var(--grad); }
.lesson-body h2[data-kind="assignment"] { padding: 14px 16px 14px 22px; border-radius: 14px; background: color-mix(in srgb, #f59e0b 10%, var(--surface)); border: 1px solid color-mix(in srgb, #f59e0b 28%, var(--border)); }
.lesson-body h2[data-kind="assignment"]::before { top: 12px; bottom: 12px; left: 8px; }
.lesson-body h2[data-kind="exercises"] { color: color-mix(in srgb, #059669 70%, var(--text)); }
.lesson-body h2[data-kind="mistakes"]  { color: color-mix(in srgb, #dc2626 65%, var(--text)); }
.lesson-body h3 { color: var(--text); }
.lesson-body details > summary { transition: background .2s; border-radius: var(--radius-sm); }
.lesson-body details > summary:hover { background: var(--grad-soft); }

/* =====================================================================
   CREAM WHITE & BLUE EDITION
   Warm cream surfaces, deep-blue ink, royal-blue accents. Dark mode stays deep navy.
   ===================================================================== */

/* ---- canvas ---- */
body { background:
    radial-gradient(1000px 520px at 88% -10%, rgba(56,189,248,.10), transparent 60%),
    radial-gradient(900px 560px at -8% -4%, rgba(37,99,235,.07), transparent 60%),
    radial-gradient(800px 500px at 50% 110%, rgba(214,190,140,.18), transparent 60%),
    var(--bg);
  background-attachment: fixed; }
::selection { background: rgba(37,99,235,.22); }

/* ---- type: a classic serif for headings, clean sans for everything else ---- */
h1, h2 { font-family: var(--font-display); font-weight: 600; letter-spacing: -.02em; }
.stat-box .num, .hero-stats div b, .stats-band b, .hero-progress .big { font-family: var(--font-body); }
.card h2, .create-box h2, .review-card h2 { font-family: var(--font-display); }
h1 { font-size: clamp(1.8rem, 1.3rem + 1.7vw, 2.5rem); }
.kicker, .tag { letter-spacing: .08em; }
.kicker { color: var(--primary); }

/* ---- header + navigation ---- */
.topbar, .public-topbar { background: color-mix(in srgb, var(--surface) 84%, transparent); backdrop-filter: saturate(1.5) blur(14px); border-bottom-color: var(--border); }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 10px clamp(16px, 4vw, 40px); }
.topbar-right { display: flex; align-items: center; gap: 8px; }
.tabs { display: flex; align-items: center; gap: 4px; }
.tabs a { display: inline-flex; align-items: center; gap: 8px; font-weight: 600; font-size: .9rem; padding: 8px 14px; border-radius: 999px; }
.tabs a svg, .logout-link svg { width: 18px; height: 18px; flex-shrink: 0; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.tabs a:hover { transform: translateY(-1px); }
.logout-link { display: inline-flex; align-items: center; gap: 6px; color: var(--text-dim); font-size: .88rem; font-weight: 600; padding: 8px 12px; border-radius: 999px; transition: background .2s, color .2s; }
.logout-link:hover { background: var(--surface-2); color: var(--text); text-decoration: none; }
.read-progress { position: fixed; top: 0; left: 0; height: 3px; width: 0; background: var(--grad); z-index: 100; transition: width .1s linear; box-shadow: 0 0 10px rgba(37,99,235,.5); }

/* ---- surfaces ---- */
.card, .create-box, .stat-box, .review-card, .course-card, .feature, .step, .path-card, .lang-chip-card, .faq details, .table-scroll {
  background: var(--surface); border-color: var(--border); box-shadow: 0 1px 2px rgba(60,45,10,.05), 0 8px 24px -16px rgba(60,45,10,.18); }
.course-card:hover, .feature:hover, .path-card:hover, .lang-chip-card:hover, .step:hover {
  box-shadow: 0 2px 4px rgba(60,45,10,.05), 0 22px 40px -22px rgba(29,78,216,.45); border-color: color-mix(in srgb, var(--primary) 40%, var(--border)); }
.section-alt { background: linear-gradient(180deg, color-mix(in srgb, var(--surface-2) 70%, var(--bg)), color-mix(in srgb, var(--surface-2) 40%, var(--bg))); border-color: var(--border); }
.section-alt .feature { background: var(--surface); }
th { background: var(--surface-2); }
tbody tr:hover td, table tr:hover td { background: color-mix(in srgb, var(--surface-2) 60%, transparent); }
.progress-track { background: var(--surface-2); border-color: var(--border); }

/* ---- landing ---- */
.hero::before { background: linear-gradient(180deg, color-mix(in srgb, var(--surface-2) 75%, var(--bg)) 0%, var(--bg) 100%); }
.blob { opacity: .34; }
.blob.b1 { background: #5b8cff; } .blob.b2 { background: #7dd3fc; } .blob.b3 { background: #f2dcab; opacity: .55; }
:root[data-theme="dark"] .blob { opacity: .38; }
:root[data-theme="dark"] .blob.b3 { background: #2563eb; opacity: .3; }
.hero h1 { font-family: var(--font-display); font-weight: 600; letter-spacing: -.03em; }
.grad-text { font-style: italic; }
.eyebrow { background: color-mix(in srgb, var(--surface) 90%, transparent); }
.marquee { background: var(--surface); border-color: var(--border); }
.marquee-item { background: var(--bg); border-color: var(--border); }
.public-section-head h2, .section-title h2 { font-family: var(--font-display); font-weight: 600; }
.cta-band { background: linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 52%, #2563eb 100%); }
.cta-band h2 { font-family: var(--font-display); }
.public-footer { background: var(--surface); border-top-color: var(--border); }

/* ---- auth: cream stage, soft blue light, centred card ---- */
.auth-shell { background: linear-gradient(180deg, #fffaf0, #f6efdd); }
:root[data-theme="dark"] .auth-shell { background: linear-gradient(180deg, #060e22, #0a1a3c); }
.auth-shell::before { background: rgba(91,140,255,.40); }
.auth-shell::after { background: rgba(125,211,252,.42); }
.auth-card { background: color-mix(in srgb, var(--surface) 92%, transparent); border-color: var(--border); box-shadow: 0 30px 70px -30px rgba(29,78,216,.45), 0 2px 6px rgba(60,45,10,.06); }
.auth-card h1 { font-family: var(--font-display); }

/* ---- lessons: comfortable reading column ---- */
.lesson-layout { max-width: 780px; }
.lesson-body { font-size: 1.04rem; line-height: 1.8; }
.lesson-body p { margin-bottom: 1.1em; }
.lesson-body h2 { font-family: var(--font-display); }
.lesson-body blockquote { background: var(--grad-soft); border-left-color: var(--primary); }
.lesson-body details { background: var(--surface-2); border-color: var(--border); }
.lesson-body pre { box-shadow: 0 14px 30px -18px rgba(10,22,48,.7); }
.lesson-row { border-top-color: var(--border); }
.next-up { background: linear-gradient(180deg, color-mix(in srgb, var(--primary) 7%, var(--surface)), var(--surface)); }

/* ---- code runner (Run / Edit on JavaScript blocks) ---- */
.code-wrap .run-btn { right: 128px; opacity: 1; background: rgba(52,211,160,.18); color: #8be0b0; border-color: rgba(52,211,160,.35); }
.code-wrap .run-btn:hover { background: rgba(52,211,160,.32); }
.code-wrap .edit-btn { right: 70px; opacity: 1; }
.code-wrap .run-btn:disabled { opacity: .5; cursor: wait; }
.code-edit { display: block; width: 100%; margin: 1.2em 0 0; padding: 16px; background: var(--code-bg); color: var(--code-fg); border: 1px solid var(--primary); border-radius: var(--radius); font: .88rem/1.6 var(--font-mono); resize: vertical; tab-size: 2; }
.run-out { margin: -.6em 0 1.4em; background: var(--surface-2); color: var(--text); border: 1px solid var(--border); border-left: 3px solid var(--success); border-radius: var(--radius-sm); padding: 12px 16px; font-size: .85rem; white-space: pre-wrap; animation: fadeUp .3s both; }
.run-out.run-bad { border-left-color: var(--danger-c); color: var(--danger-c); }
@media (hover: none) { .code-wrap .copy-btn { opacity: 1; } }

/* ---- admin: cream sidebar, clear active state ---- */
.admin-nav { background: linear-gradient(180deg, var(--surface), color-mix(in srgb, var(--surface-2) 70%, var(--surface))); border-right-color: var(--border); }
.admin-nav a.active { background: color-mix(in srgb, var(--primary) 10%, var(--surface)); color: var(--primary); box-shadow: inset 3px 0 0 var(--primary); }
.admin-nav a.nav-item:hover { transform: translateX(3px); }
.admin-main { max-width: 1180px; }
.ai-hero { background: linear-gradient(135deg, color-mix(in srgb, var(--primary) 7%, var(--surface)), var(--surface)); }
.pill-draft { background: var(--surface-2); }
.pill-pause { background: color-mix(in srgb, var(--warning) 16%, transparent); color: var(--warning); }

/* ---- mobile: bottom tab bar for students, scrolling pill menu for admin ---- */
@media (max-width: 760px) {
  .topbar { padding: 8px 14px; }
  .tabs { position: fixed; left: 10px; right: 10px; bottom: 10px; z-index: 60; justify-content: space-around; gap: 2px; padding: 6px;
    background: color-mix(in srgb, var(--surface) 94%, transparent); backdrop-filter: blur(16px); border: 1px solid var(--border); border-radius: 22px;
    box-shadow: 0 18px 40px -14px rgba(29,78,216,.45), 0 2px 6px rgba(60,45,10,.08); }
  .tabs a { flex: 1; flex-direction: column; gap: 2px; padding: 8px 2px; font-size: .66rem; border-radius: 16px; text-align: center; min-width: 0; }
  .tabs a svg { width: 22px; height: 22px; }
  .tabs a.active { box-shadow: 0 8px 16px -8px rgba(37,99,235,.8); }
  .page-wrap { padding: 22px 16px 120px; }
  .logout-link span { display: none; }
  .logout-link { padding: 8px; }
  .admin-nav { flex-wrap: nowrap; overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
  .admin-nav::-webkit-scrollbar { display: none; }
  .admin-nav a.nav-item { white-space: nowrap; flex-shrink: 0; }
  .admin-nav .auth-brand { flex-shrink: 0; margin: 0 8px 0 0; }
  .lesson-body { font-size: 1rem; }
  .course-grid { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
}