/* Gradus LMS — front end */

:root {
	--gradus-accent: #2f6fed;
	--gradus-radius: 10px;
	--gradus-ink: #14161a;
	--gradus-ink-2: #4a505a;
	--gradus-ink-3: #7b828e;
	--gradus-line: #e3e6ea;
	--gradus-soft: #f5f6f8;
	--gradus-card: #ffffff;
	--gradus-hero-bg: #0f1115;
	--gradus-hero-ink: #f3f4f6;
	--gradus-hero-ink-2: #a9afb9;
	--gradus-ok: #1f9d55;
}

.gradus,
.gradus * { box-sizing: border-box; }
.gradus { color: var(--gradus-ink); line-height: 1.55; }
.gradus :where(a) { color: inherit; }
.gradus :where(h1, h2, h3) { line-height: 1.2; margin: 0; letter-spacing: -0.01em; }
.gradus :where(img) { max-width: 100%; height: auto; display: block; }
.gradus :where(ul) { margin: 0; padding: 0; list-style: none; }
.gradus-icon { flex: 0 0 auto; vertical-align: middle; }
.gradus-muted { color: var(--gradus-ink-3); margin: 0; }
.gradus .screen-reader-text { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(1px, 1px, 1px, 1px); white-space: nowrap; }

/* Buttons */
.gradus-btn {
	display: inline-flex; align-items: center; justify-content: center; gap: 8px;
	background: var(--gradus-accent); color: #fff !important; border: 1px solid var(--gradus-accent);
	padding: 12px 22px; border-radius: var(--gradus-radius); font-weight: 600; font-size: 15px; line-height: 1.2;
	text-decoration: none !important; cursor: pointer; transition: filter .15s ease, transform .15s ease, background .15s ease;
	font-family: inherit;
}
.gradus-btn:hover { filter: brightness(1.08); }
.gradus-btn:active { transform: translateY(1px); }
.gradus-btn--ghost { background: transparent; color: inherit !important; border-color: currentColor; opacity: .85; }
.gradus-btn--ghost:hover { opacity: 1; filter: none; }
.gradus-btn.is-disabled { opacity: .35; pointer-events: none; }
.gradus-btn.is-busy { opacity: .6; pointer-events: none; }

.gradus-notice {
	border: 1px solid var(--gradus-accent); background: color-mix(in srgb, var(--gradus-accent) 8%, transparent);
	padding: 12px 16px; border-radius: var(--gradus-radius); margin: 0 0 20px; font-size: 15px;
}
.gradus-empty { color: var(--gradus-ink-3); }
.gradus-tag {
	display: inline-flex; align-items: center; gap: 5px; font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .04em;
	color: var(--gradus-accent) !important; text-decoration: none !important;
}

/* Progress */
.gradus-progress { display: grid; gap: 6px; margin-bottom: 16px; }
.gradus-progress__bar { height: 6px; border-radius: 6px; background: color-mix(in srgb, currentColor 14%, transparent); overflow: hidden; }
.gradus-progress__bar span { display: block; height: 100%; background: var(--gradus-accent); border-radius: 6px; transition: width .4s ease; }
.gradus-progress__label { font-size: 13px; color: var(--gradus-ink-3); }

/* Price */
.gradus-price { display: inline-flex; align-items: baseline; gap: 8px; }
.gradus-price strong { font-size: 1.15em; }
.gradus-price del { color: var(--gradus-ink-3); font-weight: 400; }
.gradus-price--free { font-weight: 700; color: var(--gradus-ok); }

/* ---------- Landing ---------- */
.gradus-landing { --gradus-max: 1180px; }
.gradus-hero { background: var(--gradus-hero-bg); color: var(--gradus-hero-ink); padding: 56px 20px; }
.gradus-hero__inner { max-width: var(--gradus-max); margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1fr) 380px; gap: 48px; align-items: start; }
.gradus-hero__eyebrow { text-transform: uppercase; letter-spacing: .12em; font-size: 12px; font-weight: 700; color: var(--gradus-accent); margin: 0 0 14px; }
.gradus-hero__title { font-size: clamp(30px, 4vw, 46px); font-weight: 700; color: inherit; }
.gradus-hero__subtitle { font-size: 19px; color: var(--gradus-hero-ink-2); margin: 16px 0 0; max-width: 640px; }
.gradus-hero__by { margin: 18px 0 0; font-size: 15px; color: var(--gradus-hero-ink-2); }
.gradus-hero__meta { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 26px; font-size: 14px; color: var(--gradus-hero-ink-2); }
.gradus-hero__meta li { display: inline-flex; align-items: center; gap: 7px; }
.gradus-hero__aside { position: relative; }

.gradus-buy { background: var(--gradus-card); color: var(--gradus-ink); border-radius: calc(var(--gradus-radius) + 4px); overflow: hidden; box-shadow: 0 24px 60px rgba(0, 0, 0, .28); }
.gradus-hero .gradus-buy { margin-bottom: -140px; }
.gradus-buy__media { background: #000; }
.gradus-buy__media img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.gradus-buy__body { padding: 24px; }
.gradus-buy__price { font-size: 28px; font-weight: 700; margin-bottom: 16px; }
.gradus-buy .gradus-btn { width: 100%; }
.gradus-buy__heading { margin: 22px 0 10px; font-weight: 700; font-size: 14px; }
.gradus-buy__list { display: grid; gap: 9px; font-size: 14px; color: var(--gradus-ink-2); }
.gradus-buy__list li { display: flex; gap: 10px; align-items: center; }

.gradus-landing__body { padding: 0 20px 64px; }
.gradus-landing__main { max-width: var(--gradus-max); margin: 0 auto; padding-right: 428px; }
.gradus-section { margin-top: 48px; }
.gradus-section__head { margin-bottom: 18px; }
.gradus-section__head h2 { font-size: 24px; font-weight: 700; }
.gradus-section__head .gradus-muted { margin-top: 6px; font-size: 14px; }

.gradus-list ul { display: grid; gap: 10px; }
.gradus-list--outcomes ul { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 28px; border: 1px solid var(--gradus-line); border-radius: var(--gradus-radius); padding: 24px; }
.gradus-list li { display: flex; gap: 10px; align-items: flex-start; }
.gradus-list--outcomes .gradus-icon { color: var(--gradus-ok); margin-top: 3px; }
.gradus-list--requirements li::before, .gradus-list--audience li::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--gradus-ink-3); margin-top: 10px; flex: 0 0 6px; }

.gradus-module { border: 1px solid var(--gradus-line); border-radius: var(--gradus-radius); margin-bottom: 10px; background: var(--gradus-card); overflow: hidden; }
.gradus-module > summary { display: flex; justify-content: space-between; gap: 16px; align-items: center; padding: 16px 18px; cursor: pointer; list-style: none; background: var(--gradus-soft); font-weight: 600; }
.gradus-module > summary::-webkit-details-marker { display: none; }
.gradus-module__title { display: inline-flex; align-items: center; gap: 10px; }
.gradus-module__title .gradus-icon { transition: transform .2s ease; transform: rotate(-90deg); }
.gradus-module[open] .gradus-module__title .gradus-icon { transform: none; }
.gradus-module__meta { font-size: 13px; font-weight: 400; color: var(--gradus-ink-3); white-space: nowrap; }
.gradus-lessons { padding: 6px 0; }
.gradus-lesson-row { display: grid; grid-template-columns: 22px minmax(0, 1fr) auto auto; gap: 12px; align-items: center; padding: 10px 18px; font-size: 15px; }
.gradus-lesson-row__icon { color: var(--gradus-ink-3); display: flex; }
.gradus-lesson-row.is-done .gradus-lesson-row__icon { color: var(--gradus-ok); }
.gradus-lesson-row__title { text-decoration: none; }
a.gradus-lesson-row__title:hover { color: var(--gradus-accent); }
.gradus-lesson-row__lock { color: var(--gradus-ink-3); display: flex; }
.gradus-lesson-row__time { font-size: 13px; color: var(--gradus-ink-3); min-width: 54px; text-align: right; }

.gradus-prose > *:first-child { margin-top: 0; }
.gradus-prose > *:last-child { margin-bottom: 0; }

.gradus-instructors__list { display: grid; gap: 20px; }
.gradus-instructor { display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 20px; align-items: start; }
.gradus-instructor__photo { width: 96px; height: 96px; border-radius: 50%; overflow: hidden; background: var(--gradus-soft); display: grid; place-items: center; font-size: 34px; font-weight: 700; color: var(--gradus-ink-3); }
.gradus-instructor__photo img { width: 100%; height: 100%; object-fit: cover; }
.gradus-instructor h3 { font-size: 19px; }
.gradus-instructor__role { margin: 4px 0 10px; color: var(--gradus-accent); font-size: 14px; font-weight: 600; }
.gradus-instructor__bio { color: var(--gradus-ink-2); font-size: 15px; }
.gradus-instructor__bio p { margin: 0 0 .7em; }

.gradus-final-cta { text-align: center; border-top: 1px solid var(--gradus-line); padding-top: 40px; }
.gradus-final-cta h2 { font-size: 24px; margin-bottom: 18px; }

/* ---------- Catalog & cards ---------- */
.gradus-catalog { max-width: 1180px; margin: 0 auto; padding: 48px 20px 64px; }
.gradus-catalog__head { margin-bottom: 28px; }
.gradus-catalog__head h1 { font-size: clamp(28px, 3.5vw, 40px); }
.gradus-filters { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.gradus-filters a { border: 1px solid var(--gradus-line); padding: 7px 14px; border-radius: 999px; font-size: 14px; text-decoration: none; }
.gradus-filters a.is-active, .gradus-filters a:hover { border-color: var(--gradus-accent); color: var(--gradus-accent); }

.gradus-grid { display: grid; gap: 24px; }
.gradus-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.gradus-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.gradus-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.gradus-card { background: var(--gradus-card); border: 1px solid var(--gradus-line); border-radius: calc(var(--gradus-radius) + 2px); overflow: hidden; display: flex; flex-direction: column; transition: box-shadow .2s ease, transform .2s ease; }
.gradus-card:hover { box-shadow: 0 14px 34px rgba(15, 17, 21, .1); transform: translateY(-2px); }
.gradus-card__media { display: block; aspect-ratio: 16 / 9; background: var(--gradus-soft); overflow: hidden; }
.gradus-card__media img { width: 100%; height: 100%; object-fit: cover; }
.gradus-card__placeholder { display: grid; place-items: center; height: 100%; color: var(--gradus-ink-3); }
.gradus-card__placeholder .gradus-icon { width: 40px; height: 40px; }
.gradus-card__body { padding: 18px 20px 20px; display: flex; flex-direction: column; flex: 1; }
.gradus-card__eyebrow { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--gradus-accent); margin-bottom: 8px; }
.gradus-card__title { font-size: 18px; font-weight: 700; }
.gradus-card__title a { text-decoration: none; }
.gradus-card__text { color: var(--gradus-ink-2); font-size: 14px; margin: 8px 0 0; }
.gradus-card__meta { display: flex; flex-wrap: wrap; gap: 6px 16px; margin-top: 14px; font-size: 13px; color: var(--gradus-ink-3); }
.gradus-card__meta span { display: inline-flex; align-items: center; gap: 6px; }
.gradus-card__meta .gradus-icon { width: 15px; height: 15px; }
.gradus-card__foot { margin-top: auto; padding-top: 16px; }
.gradus-card__progress { font-size: 14px; font-weight: 600; color: var(--gradus-accent); }

/* ---------- My courses ---------- */
.gradus-my-courses h2, .gradus-login h2 { font-size: 24px; margin-bottom: 20px; }
.gradus-my-courses__list { display: grid; gap: 14px; }
.gradus-my-course { display: grid; grid-template-columns: 160px minmax(0, 1fr) auto; gap: 20px; align-items: center; border: 1px solid var(--gradus-line); border-radius: var(--gradus-radius); padding: 14px; }
.gradus-my-course__media { aspect-ratio: 16 / 9; background: var(--gradus-soft); border-radius: 6px; overflow: hidden; }
.gradus-my-course__media img { width: 100%; height: 100%; object-fit: cover; }
.gradus-my-course h3 { font-size: 17px; margin-bottom: 10px; }
.gradus-my-course h3 a { text-decoration: none; }
.gradus-my-course .gradus-progress { margin: 0; }

/* ---------- Video ---------- */
.gradus-video { position: relative; aspect-ratio: 16 / 9; background: #000; width: 100%; }
.gradus-video iframe, .gradus-video video { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

/* ---------- Classroom ---------- */
body.gradus-classroom-page { margin: 0; padding: 0; }
.gradus-classroom {
	--c-bg: #0d0f13; --c-panel: #14171d; --c-line: #262a32; --c-ink: #eef0f3; --c-ink-2: #b4bac4; --c-ink-3: #7d8490;
	background: var(--c-bg); color: var(--c-ink); min-height: 100vh;
	font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; font-size: 16px;
}
.gradus-theme-light .gradus-classroom {
	--c-bg: #f4f5f7; --c-panel: #ffffff; --c-line: #e1e4e8; --c-ink: #14161a; --c-ink-2: #4a505a; --c-ink-3: #7b828e;
}
.gradus-classroom .gradus-muted { color: var(--c-ink-3); }
.gradus-topbar { position: sticky; top: 0; z-index: 30; height: 60px; display: flex; align-items: center; gap: 20px; padding: 0 20px; background: var(--c-panel); border-bottom: 1px solid var(--c-line); }
.admin-bar .gradus-topbar { top: 32px; }
.gradus-topbar__back { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 600; min-width: 0; flex: 1; }
.gradus-topbar__back span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.gradus-topbar__progress { display: flex; align-items: center; gap: 10px; width: 220px; }
.gradus-topbar__progress .gradus-progress__bar { flex: 1; }
.gradus-topbar__percent { font-size: 13px; color: var(--c-ink-2); min-width: 38px; text-align: right; }
.gradus-topbar__toggle, .gradus-sidebar__close { display: none; background: transparent; border: 1px solid var(--c-line); color: inherit; border-radius: 8px; padding: 7px; cursor: pointer; }

.gradus-classroom__layout { display: grid; grid-template-columns: minmax(0, 1fr) 360px; min-height: calc(100vh - 60px); background: linear-gradient(to left, var(--c-panel) 360px, transparent 360px); }
.gradus-classroom__layout::after { content: none; }
.gradus-stage { min-width: 0; padding-bottom: 40px; }
.gradus-stage .gradus-notice { margin: 20px 32px 0; }
.gradus-stage__video { background: #000; }
.gradus-stage__video .gradus-video { max-height: calc(100vh - 160px); }
.gradus-stage__content { max-width: 860px; margin: 0 auto; padding: 32px; }
.gradus-stage__eyebrow { font-size: 13px; color: var(--c-ink-3); margin: 0 0 8px; text-transform: uppercase; letter-spacing: .06em; font-weight: 600; }
.gradus-stage__title { font-size: clamp(24px, 2.6vw, 32px); font-weight: 700; margin-bottom: 24px; color: var(--c-ink); }
.gradus-classroom .gradus-prose { color: var(--c-ink-2); font-size: 17px; line-height: 1.7; }
.gradus-classroom .gradus-prose h2, .gradus-classroom .gradus-prose h3 { color: var(--c-ink); margin: 1.6em 0 .6em; }
.gradus-classroom .gradus-prose a { color: var(--gradus-accent); }

.gradus-preview-banner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px; border: 1px solid var(--gradus-accent); border-radius: var(--gradus-radius); padding: 14px 18px; margin-bottom: 24px; }

.gradus-materials { margin-top: 36px; border-top: 1px solid var(--c-line); padding-top: 24px; }
.gradus-materials h2 { font-size: 18px; margin-bottom: 14px; color: var(--c-ink); }
.gradus-materials ul { display: grid; gap: 8px; }
.gradus-materials a { display: flex; align-items: center; gap: 12px; padding: 12px 14px; border: 1px solid var(--c-line); border-radius: var(--gradus-radius); text-decoration: none; background: var(--c-panel); }
.gradus-materials a:hover { border-color: var(--gradus-accent); }
.gradus-materials small { margin-left: auto; color: var(--c-ink-3); }

.gradus-lesson-nav { max-width: 860px; margin: 0 auto; padding: 24px 32px 0; border-top: 1px solid var(--c-line); display: grid; grid-template-columns: 1fr auto 1fr; gap: 12px; align-items: center; }
.gradus-lesson-nav__next { text-align: right; }
.gradus-lesson-nav form { margin: 0; }
.gradus-done-label { display: inline-flex; align-items: center; gap: 8px; color: var(--gradus-ok); font-weight: 600; }

.gradus-sidebar { background: var(--c-panel); border-left: 1px solid var(--c-line); overflow-y: auto; max-height: calc(100vh - 60px); position: sticky; top: 60px; }
.admin-bar .gradus-sidebar { top: 92px; max-height: calc(100vh - 92px); }
.gradus-sidebar__head { display: flex; align-items: center; justify-content: space-between; padding: 18px 20px; border-bottom: 1px solid var(--c-line); }
.gradus-sidebar__head h2 { font-size: 16px; color: var(--c-ink); }
.gradus-side-module { border-bottom: 1px solid var(--c-line); }
.gradus-side-module > summary { display: flex; justify-content: space-between; gap: 12px; padding: 14px 20px; cursor: pointer; list-style: none; font-weight: 600; font-size: 14px; }
.gradus-side-module > summary::-webkit-details-marker { display: none; }
.gradus-side-module__meta { color: var(--c-ink-3); font-weight: 400; font-size: 13px; }
.gradus-side-module ul { padding-bottom: 8px; }
.gradus-side-lesson > a, .gradus-side-lesson > span { display: grid; grid-template-columns: 20px minmax(0, 1fr) auto; gap: 10px; align-items: start; padding: 9px 20px; font-size: 14px; color: var(--c-ink-2); text-decoration: none; border-left: 3px solid transparent; }
.gradus-side-lesson > a:hover { background: color-mix(in srgb, var(--c-ink) 5%, transparent); color: var(--c-ink); }
.gradus-side-lesson.is-current > a { border-left-color: var(--gradus-accent); background: color-mix(in srgb, var(--gradus-accent) 12%, transparent); color: var(--c-ink); font-weight: 600; }
.gradus-side-lesson.is-done .gradus-side-lesson__icon { color: var(--gradus-ok); }
.gradus-side-lesson.is-locked { opacity: .5; }
.gradus-side-lesson__icon { display: flex; color: var(--c-ink-3); padding-top: 1px; }
.gradus-side-lesson__icon .gradus-icon { width: 16px; height: 16px; }
.gradus-side-lesson__time { font-size: 12px; color: var(--c-ink-3); padding-top: 2px; }

.gradus-toast { position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px); background: var(--c-ink); color: var(--c-bg); padding: 12px 20px; border-radius: var(--gradus-radius); font-weight: 600; font-size: 14px; opacity: 0; pointer-events: none; transition: all .25s ease; z-index: 50; }
.gradus-toast.is-visible { opacity: 1; transform: translate(-50%, 0); }

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
	.gradus-hero__inner { grid-template-columns: minmax(0, 1fr) 340px; gap: 32px; }
	.gradus-landing__main { padding-right: 372px; }
	.gradus-grid--4 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
	.gradus-hero { padding: 40px 16px; }
	.gradus-hero__inner { grid-template-columns: minmax(0, 1fr); }
	.gradus-hero .gradus-buy { margin-bottom: 0; }
	.gradus-landing__body { padding: 0 16px 48px; }
	.gradus-landing__main { padding-right: 0; }
	.gradus-grid--3, .gradus-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

	.gradus-classroom__layout { grid-template-columns: minmax(0, 1fr); background: none; }
	.gradus-topbar__toggle, .gradus-sidebar__close { display: inline-flex; }
	.gradus-topbar__progress { width: 120px; }
	.gradus-sidebar { position: fixed; top: 0; right: 0; bottom: 0; width: min(380px, 92vw); max-height: none; z-index: 60; transform: translateX(100%); transition: transform .25s ease; box-shadow: -20px 0 50px rgba(0, 0, 0, .35); }
	.admin-bar .gradus-sidebar { top: 32px; max-height: none; }
	.gradus-sidebar.is-open { transform: none; }
	.gradus-stage__content { padding: 24px 16px; }
	.gradus-stage .gradus-notice { margin: 16px 16px 0; }
	.gradus-lesson-nav { padding: 20px 16px 0; }
}
@media (max-width: 782px) {
	.admin-bar .gradus-topbar { top: 46px; }
	.admin-bar .gradus-sidebar { top: 46px; }
}
@media (max-width: 640px) {
	.gradus-grid--2, .gradus-grid--3, .gradus-grid--4 { grid-template-columns: minmax(0, 1fr); }
	.gradus-list--outcomes ul { grid-template-columns: minmax(0, 1fr); }
	.gradus-instructor { grid-template-columns: 64px minmax(0, 1fr); gap: 14px; }
	.gradus-instructor__photo { width: 64px; height: 64px; font-size: 24px; }
	.gradus-my-course { grid-template-columns: minmax(0, 1fr); }
	.gradus-lesson-row { grid-template-columns: 22px minmax(0, 1fr) auto; }
	.gradus-lesson-row__time { display: none; }
	.gradus-topbar__progress { display: none; }
	.gradus-lesson-nav { grid-template-columns: 1fr 1fr; }
	.gradus-lesson-nav__main { grid-column: 1 / -1; order: -1; text-align: center; }
	.gradus-lesson-nav__main .gradus-btn { width: 100%; }
}

/* ---------- Quizzes ---------- */
.gradus-quiz { margin-top: 8px; }
.gradus-quiz__facts { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin: 0 0 28px; }
.gradus-quiz__facts li { border: 1px solid var(--c-line, var(--gradus-line)); border-radius: var(--gradus-radius); padding: 16px; display: grid; gap: 4px; background: var(--c-panel, var(--gradus-card)); }
.gradus-quiz__facts strong { font-size: 22px; }
.gradus-quiz__facts span { font-size: 13px; color: var(--c-ink-3, var(--gradus-ink-3)); }
.gradus-quiz__start { display: grid; gap: 12px; justify-items: start; }
.gradus-quiz__start .gradus-muted { font-size: 14px; }
.gradus-quiz__history { margin-bottom: 28px; }
.gradus-quiz__history h2, .gradus-review h2 { font-size: 18px; margin-bottom: 12px; color: var(--c-ink, var(--gradus-ink)); }
.gradus-quiz__history li { display: grid; grid-template-columns: minmax(0, 1fr) auto 60px auto; gap: 14px; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--c-line, var(--gradus-line)); font-size: 14px; }
.gradus-quiz__history a { color: var(--gradus-accent); text-decoration: none; font-weight: 600; }
.gradus-quiz__badge { font-size: 12px; font-weight: 700; padding: 3px 9px; border-radius: 999px; background: color-mix(in srgb, currentColor 12%, transparent); }
.gradus-quiz__badge--passed { color: var(--gradus-ok); }
.gradus-quiz__badge--failed { color: #d94848; }
.gradus-quiz__badge--pending { color: #c98a12; }
.gradus-quiz__timer { position: sticky; top: 72px; z-index: 5; display: inline-flex; align-items: center; gap: 8px; float: right; background: var(--c-panel, var(--gradus-card)); border: 1px solid var(--c-line, var(--gradus-line)); border-radius: 999px; padding: 8px 14px; font-weight: 700; font-variant-numeric: tabular-nums; }
.gradus-quiz__timer.is-low { color: #d94848; border-color: #d94848; }
.gradus-question { border: 1px solid var(--c-line, var(--gradus-line)); border-radius: var(--gradus-radius); padding: 22px; margin: 0 0 16px; background: var(--c-panel, var(--gradus-card)); clear: both; }
.gradus-question legend { display: contents; }
.gradus-question__num { display: block; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--c-ink-3, var(--gradus-ink-3)); margin-bottom: 8px; }
.gradus-question__text { display: block; font-size: 17px; font-weight: 600; color: var(--c-ink, var(--gradus-ink)); }
.gradus-question__text p { margin: 0 0 .5em; }
.gradus-question__hint { font-size: 13px; color: var(--c-ink-3, var(--gradus-ink-3)); margin: 4px 0 0; }
.gradus-question__answers { display: grid; gap: 8px; margin-top: 14px; }
.gradus-answer { display: flex; gap: 12px; align-items: center; padding: 12px 14px; border: 1px solid var(--c-line, var(--gradus-line)); border-radius: 8px; cursor: pointer; transition: border-color .15s ease, background .15s ease; }
.gradus-answer:hover { border-color: var(--gradus-accent); }
.gradus-answer:has(input:checked) { border-color: var(--gradus-accent); background: color-mix(in srgb, var(--gradus-accent) 10%, transparent); }
.gradus-answer input { accent-color: var(--gradus-accent); width: 18px; height: 18px; margin: 0; flex: 0 0 auto; }
.gradus-question__open { width: 100%; margin-top: 14px; border-radius: 8px; border: 1px solid var(--c-line, var(--gradus-line)); background: transparent; color: inherit; padding: 12px; font: inherit; }
.gradus-quiz__submit { margin-top: 20px; }

.gradus-result { text-align: center; border: 1px solid var(--c-line, var(--gradus-line)); border-radius: calc(var(--gradus-radius) + 4px); padding: 36px 24px; background: var(--c-panel, var(--gradus-card)); }
.gradus-result__score { font-size: 64px; font-weight: 800; line-height: 1; margin: 0; }
.gradus-result__score small { font-size: 28px; }
.gradus-quiz--passed .gradus-result__score { color: var(--gradus-ok); }
.gradus-quiz--failed .gradus-result__score { color: #d94848; }
.gradus-result__status { font-size: 20px; font-weight: 700; margin: 12px 0 6px; color: var(--c-ink, var(--gradus-ink)); }
.gradus-result__actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.gradus-review { margin-top: 36px; }
.gradus-review__item { border: 1px solid var(--c-line, var(--gradus-line)); border-left-width: 4px; border-radius: 8px; padding: 16px 18px; margin-bottom: 12px; }
.gradus-review__item.is-right { border-left-color: var(--gradus-ok); }
.gradus-review__item.is-wrong { border-left-color: #d94848; }
.gradus-review__q { display: flex; gap: 8px; font-weight: 600; color: var(--c-ink, var(--gradus-ink)); }
.gradus-review__q p { margin: 0; }
.gradus-review__answers { display: grid; gap: 6px; margin-top: 10px !important; }
.gradus-review__answers li { display: flex; gap: 8px; align-items: center; font-size: 15px; color: var(--c-ink-3, var(--gradus-ink-3)); }
.gradus-review__answers li.is-correct { color: var(--gradus-ok); font-weight: 600; }
.gradus-review__answers li.is-chosen:not(.is-correct) { color: #d94848; text-decoration: line-through; }
.gradus-review__explanation, .gradus-review__feedback { margin: 10px 0 0; font-size: 14px; padding: 10px 12px; border-radius: 6px; background: color-mix(in srgb, var(--gradus-accent) 8%, transparent); }
.gradus-review__open { margin: 10px 0 0; padding: 10px 14px; border-left: 3px solid var(--c-line, var(--gradus-line)); }
.gradus-review__points { font-weight: 700; margin: 8px 0 0; }
.gradus-side-lesson.is-quiz .gradus-side-lesson__title { font-weight: 600; }

/* Completed banner */
.gradus-completed { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin: 20px 32px 20px; padding: 16px 20px; border-radius: var(--gradus-radius); border: 1px solid var(--gradus-ok); background: color-mix(in srgb, var(--gradus-ok) 10%, transparent); }
.gradus-completed > .gradus-icon { width: 30px; height: 30px; color: var(--gradus-ok); }
.gradus-completed > div { display: grid; flex: 1; min-width: 200px; }
.gradus-completed span { font-size: 14px; opacity: .85; }

/* Verification */
.gradus-verify-page { max-width: 640px; margin: 0 auto; padding: 56px 20px; }
.gradus-verify-page h1 { font-size: 30px; margin-bottom: 24px; }
.gradus-verify__badge { display: flex; align-items: center; gap: 10px; padding: 14px 16px; border-radius: var(--gradus-radius); font-weight: 700; margin-bottom: 20px; }
.gradus-verify__badge.is-valid { background: color-mix(in srgb, var(--gradus-ok) 12%, transparent); color: var(--gradus-ok); }
.gradus-verify__badge.is-invalid { background: rgba(217, 72, 72, .1); color: #d94848; }
.gradus-verify__data { display: grid; grid-template-columns: 140px minmax(0, 1fr); gap: 10px 16px; margin: 0 0 28px; border: 1px solid var(--gradus-line); border-radius: var(--gradus-radius); padding: 20px; }
.gradus-verify__data dt { color: var(--gradus-ink-3); }
.gradus-verify__data dd { margin: 0; font-weight: 600; }
.gradus-verify__form label { display: block; font-weight: 600; margin-bottom: 8px; }
.gradus-verify__form div { display: flex; gap: 8px; }
.gradus-verify__form input { flex: 1; padding: 11px 14px; border: 1px solid var(--gradus-line); border-radius: var(--gradus-radius); font: inherit; text-transform: uppercase; }

@media (max-width: 900px) {
	.gradus-completed { margin: 16px 16px 16px; }
}
@media (max-width: 640px) {
	.gradus-quiz__facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
	.gradus-quiz__history li { grid-template-columns: minmax(0, 1fr) auto; }
	.gradus-verify__data { grid-template-columns: minmax(0, 1fr); gap: 2px; }
	.gradus-verify__data dd { margin-bottom: 10px; }
}

/* ---------- Forms ---------- */
.gradus-notice--error { border-color: #d94848; background: rgba(217, 72, 72, .08); }
.gradus-form, .gradus-checkout__form { display: grid; gap: 16px; }
.gradus-form label, .gradus-checkout__form label:not(.gradus-method):not(.gradus-check) { display: grid; gap: 6px; font-weight: 600; font-size: 14px; }
.gradus-form input[type="text"], .gradus-form input[type="email"], .gradus-form input[type="password"],
.gradus-checkout__form input[type="text"], .gradus-checkout__form input[type="email"] {
	width: 100%; padding: 11px 14px; border: 1px solid var(--gradus-line); border-radius: var(--gradus-radius); font: inherit; font-weight: 400; background: #fff; color: var(--gradus-ink);
}
.gradus-form input:focus, .gradus-checkout__form input:focus { outline: 2px solid var(--gradus-accent); outline-offset: 0; border-color: transparent; }
.gradus-form small { font-weight: 400; color: var(--gradus-ink-3); }
.gradus-form fieldset, .gradus-checkout__form fieldset { border: 0; padding: 0; margin: 0; display: grid; gap: 14px; }
.gradus-form legend, .gradus-checkout__form legend { font-weight: 700; font-size: 16px; margin-bottom: 10px; padding: 0; }
.gradus-form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.gradus-check { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; }
.gradus-check input { margin-top: 3px; accent-color: var(--gradus-accent); }
.gradus-check a { color: var(--gradus-accent); }

/* ---------- Checkout ---------- */
.gradus-checkout { max-width: 1040px; margin: 0 auto; padding: 48px 20px 64px; }
.gradus-checkout__grid { display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: 48px; align-items: start; }
.gradus-checkout__main { order: 1; }
.gradus-checkout__summary { order: 2; border: 1px solid var(--gradus-line); border-radius: calc(var(--gradus-radius) + 4px); padding: 22px; position: sticky; top: 24px; background: var(--gradus-card); }
.gradus-checkout__thumb { border-radius: var(--gradus-radius); overflow: hidden; margin-bottom: 16px; aspect-ratio: 16 / 9; }
.gradus-checkout__thumb img { width: 100%; height: 100%; object-fit: cover; }
.gradus-checkout__summary h2 { font-size: 19px; }
.gradus-checkout__summary .gradus-muted { margin-top: 6px; font-size: 14px; }
.gradus-checkout__total { display: flex; justify-content: space-between; align-items: baseline; border-top: 1px solid var(--gradus-line); border-bottom: 1px solid var(--gradus-line); padding: 14px 0; margin: 18px 0; font-weight: 600; }
.gradus-checkout__total .gradus-price strong { font-size: 24px; }
.gradus-checkout h1 { font-size: clamp(26px, 3vw, 34px); margin-bottom: 24px; }
.gradus-checkout__signed { margin: 0; color: var(--gradus-ink-2); }
.gradus-checkout__signed a, .gradus-checkout__form .gradus-muted a { color: var(--gradus-accent); }
.gradus-checkout__form .gradus-muted { font-size: 13px; }
.gradus-methods { display: grid; gap: 10px; }
.gradus-method { position: relative; cursor: pointer; }
.gradus-method input { position: absolute; opacity: 0; }
.gradus-method__box { display: flex; align-items: center; gap: 14px; border: 2px solid var(--gradus-line); border-radius: var(--gradus-radius); padding: 14px 16px; transition: border-color .15s ease; }
.gradus-method input:checked + .gradus-method__box { border-color: var(--gradus-accent); background: color-mix(in srgb, var(--gradus-accent) 6%, transparent); }
.gradus-method input:focus-visible + .gradus-method__box { outline: 2px solid var(--gradus-accent); outline-offset: 2px; }
.gradus-method__box > span:last-child { font-size: 15px; }
.gradus-method__logo { font-weight: 800; font-size: 13px; padding: 4px 10px; border-radius: 6px; background: var(--gradus-ink); color: #fff; min-width: 64px; text-align: center; }
.gradus-method__logo--paypal { background: #ffc439; color: #003087; }
.gradus-checkout__pay { width: 100%; padding: 15px 22px; font-size: 16px; }

/* ---------- Student area ---------- */
.gradus-area__head { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; margin-bottom: 18px; }
.gradus-area__head h2 { font-size: 28px; }
.gradus-area__head .gradus-muted { font-size: 13px; text-transform: uppercase; letter-spacing: .08em; font-weight: 700; margin-bottom: 4px; }
.gradus-area__logout { font-size: 14px; color: var(--gradus-ink-3) !important; }
.gradus-tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--gradus-line); margin-bottom: 24px; overflow-x: auto; }
.gradus-tabs a { padding: 12px 16px; text-decoration: none; font-weight: 600; font-size: 15px; color: var(--gradus-ink-3) !important; border-bottom: 2px solid transparent; margin-bottom: -1px; white-space: nowrap; }
.gradus-tabs a.is-active, .gradus-tabs a:hover { color: var(--gradus-ink) !important; border-bottom-color: var(--gradus-accent); }
.gradus-cert-list { display: grid; gap: 12px; }
.gradus-cert { display: flex; align-items: center; gap: 16px; border: 1px solid var(--gradus-line); border-radius: var(--gradus-radius); padding: 16px; }
.gradus-cert > .gradus-icon { width: 28px; height: 28px; color: var(--gradus-accent); }
.gradus-cert > div:nth-child(2) { display: grid; flex: 1; gap: 2px; }
.gradus-cert .gradus-muted { font-size: 13px; }
.gradus-cert__actions { display: flex; gap: 8px; }
.gradus-cert__actions .gradus-btn { padding: 9px 14px; font-size: 14px; }
.gradus-table { width: 100%; border-collapse: collapse; font-size: 15px; }
.gradus-table th, .gradus-table td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--gradus-line); }
.gradus-table th { font-size: 13px; color: var(--gradus-ink-3); font-weight: 600; }
.gradus-login { max-width: 420px; }
.gradus-login form p { display: grid; gap: 6px; }
.gradus-login input[type="text"], .gradus-login input[type="password"] { padding: 11px 14px; border: 1px solid var(--gradus-line); border-radius: var(--gradus-radius); font: inherit; }
.gradus-login .button-primary, .gradus-login input[type="submit"] { background: var(--gradus-accent); color: #fff; border: 0; padding: 12px 22px; border-radius: var(--gradus-radius); font-weight: 600; cursor: pointer; }
.gradus-topbar__area { font-size: 14px; font-weight: 600; text-decoration: none; opacity: .8; white-space: nowrap; }
.gradus-topbar__area:hover { opacity: 1; }

@media (max-width: 900px) {
	.gradus-checkout__grid { grid-template-columns: minmax(0, 1fr); gap: 28px; }
	.gradus-checkout__summary { order: 0; position: static; }
}
@media (max-width: 640px) {
	.gradus-form__row { grid-template-columns: minmax(0, 1fr); }
	.gradus-cert { flex-wrap: wrap; }
	.gradus-cert__actions { width: 100%; }
	.gradus-cert__actions .gradus-btn { flex: 1; }
	.gradus-topbar__area { display: none; }
	.gradus-table thead { display: none; }
	.gradus-table td { display: block; border: 0; padding: 4px 0; }
	.gradus-table tr { display: block; border-bottom: 1px solid var(--gradus-line); padding: 10px 0; }
}