:root {
    --green-950: #0b3b2f;
    --green-900: #0e4939;
    --green-800: #12614a;
    --green-700: #16805f;
    --green-600: #1ca977;
    --green-500: #2bc48a;
    --green-300: #82dfba;
    --green-100: #dff6ec;
    --green-50: #effaf5;
    --ink: #17201d;
    --ink-soft: #4e5b57;
    --muted: #7d8985;
    --line: #e4e9e7;
    --surface: #ffffff;
    --canvas: #f3f5f6;
    --danger: #c64848;
    --warning: #a56b12;
    --radius-xl: 26px;
    --radius-lg: 20px;
    --radius-md: 14px;
    --shadow-sm: 0 10px 30px rgba(20, 48, 39, .06);
    --shadow-md: 0 22px 60px rgba(13, 45, 35, .12);
    --sidebar: 88px;
    --topbar: 82px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    min-width: 320px;
    color: var(--ink);
    background: var(--canvas);
    font-family: "Manrope", "Segoe UI", sans-serif;
    font-size: 15px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

body:has(dialog[open]) { overflow: hidden; }

a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { color: inherit; }
img { display: block; max-width: 100%; }
svg { fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.8; }

.sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 40;
    width: var(--sidebar);
    background: #fff;
    border-right: 1px solid #edf0ef;
}

.sidebar__nav {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    height: 100%;
    padding: 142px 12px 28px;
}

.sidebar__link {
    position: relative;
    display: grid;
    place-items: center;
    width: 56px;
    height: 56px;
    color: #9aa6b2;
    border-radius: 16px;
    transition: color .2s ease, background .2s ease, transform .2s ease;
}

.sidebar__link svg { width: 25px; height: 25px; }
.sidebar__link > span { position: absolute; left: 70px; padding: 8px 11px; white-space: nowrap; color: #fff; background: var(--ink); border-radius: 9px; font-size: 12px; opacity: 0; pointer-events: none; transform: translateX(-6px); transition: .2s ease; }
.sidebar__link:hover { color: var(--green-700); background: var(--green-50); transform: translateY(-1px); }
.sidebar__link:hover > span { opacity: 1; transform: translateX(0); }
.sidebar__link.is-active { color: var(--green-600); background: var(--green-100); }
.sidebar__link.is-active::before { content: ""; position: absolute; left: -12px; width: 3px; height: 22px; background: var(--green-600); border-radius: 0 4px 4px 0; }
.sidebar__link--management { margin-top: auto; }

.topbar {
    position: fixed;
    inset: 0 0 auto var(--sidebar);
    z-index: 35;
    display: grid;
    grid-template-columns: minmax(220px, 1fr) auto minmax(300px, 1fr);
    align-items: center;
    height: var(--topbar);
    padding: 0 34px;
    background: rgba(255, 255, 255, .94);
    border-bottom: 1px solid #edf0ef;
    backdrop-filter: blur(16px);
}

.brand { justify-self: start; display: inline-flex; align-items: center; gap: 11px; }
.brand__mark { display: grid; place-items: center; width: 42px; height: 42px; color: var(--green-600); background: var(--green-50); border-radius: 13px; }
.brand__mark svg { width: 31px; height: 31px; }
.brand__name { font-size: 25px; font-weight: 800; letter-spacing: -.06em; }

.topnav { justify-self: center; display: flex; gap: 5px; padding: 5px; background: #f1f3f4; border-radius: 14px; }
.topnav__link { display: flex; align-items: center; gap: 9px; min-width: 132px; padding: 10px 22px; color: #697570; border-radius: 10px; font-weight: 600; transition: .2s ease; }
.topnav__link svg { width: 19px; height: 19px; }
.topnav__link:hover { color: var(--ink); }
.topnav__link.is-active { color: var(--green-700); background: #fff; box-shadow: 0 3px 13px rgba(30, 60, 51, .08); }

.profile-menu { justify-self: end; display: flex; align-items: center; gap: 12px; }
.profile-menu__manage { padding: 8px 13px; color: var(--green-700); background: var(--green-50); border-radius: 9px; font-size: 12px; font-weight: 700; }
.profile-menu__identity { display: flex; align-items: center; gap: 10px; }
.profile-menu__text { display: grid; text-align: right; }
.profile-menu__text strong { max-width: 155px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 13px; }
.profile-menu__text small { color: var(--muted); font-size: 11px; }
.avatar { display: grid; place-items: center; width: 42px; height: 42px; color: var(--green-700); background: var(--green-100); border: 3px solid #fff; border-radius: 50%; box-shadow: 0 0 0 1px var(--line); font-weight: 800; }
.icon-button { display: grid; place-items: center; width: 36px; height: 36px; padding: 0; color: #87928e; background: transparent; border: 0; border-radius: 10px; cursor: pointer; transition: .2s ease; }
.icon-button:hover { color: var(--danger); background: #fff1f1; }
.icon-button svg { width: 20px; height: 20px; }

.workspace { min-height: 100vh; padding: calc(var(--topbar) + 34px) 36px 60px calc(var(--sidebar) + 36px); }
.page-container { width: min(1420px, 100%); margin: 0 auto; }
.page-enter { animation: pageEnter .55s cubic-bezier(.22, 1, .36, 1) both; }

@keyframes pageEnter { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
@keyframes toastIn { from { opacity: 0; transform: translateX(22px); } to { opacity: 1; transform: none; } }
@keyframes pulse { 50% { transform: scale(1.08); opacity: .75; } }

.toast-stack { position: fixed; top: 98px; right: 24px; z-index: 90; display: grid; gap: 10px; width: min(400px, calc(100vw - 48px)); }
.toast { display: flex; align-items: flex-start; gap: 12px; padding: 14px 14px 14px 17px; background: #fff; border: 1px solid var(--line); border-left: 4px solid var(--green-600); border-radius: 12px; box-shadow: var(--shadow-md); animation: toastIn .35s ease both; }
.toast--error { border-left-color: var(--danger); }
.toast--warning { border-left-color: #e4a93d; }
.toast__close { margin-left: auto; padding: 0 4px; color: var(--muted); background: transparent; border: 0; font-size: 20px; cursor: pointer; }
.toast.is-leaving { opacity: 0; transform: translateX(20px); transition: .25s ease; }

.hero-banner {
    position: relative;
    display: flex;
    min-height: 278px;
    overflow: hidden;
    padding: 52px 58px;
    color: #fff;
    background: #17211e;
    border-radius: 24px;
    box-shadow: var(--shadow-md);
}
.hero-banner::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(10, 24, 19, .32), transparent 65%); pointer-events: none; }
.hero-banner__content { position: relative; z-index: 2; align-self: center; width: min(610px, 60%); }
.hero-banner__badge { display: inline-flex; padding: 6px 10px; color: var(--green-300); border: 1px solid rgba(130, 223, 186, .25); border-radius: 999px; font-size: 12px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; }
.hero-banner h1 { max-width: 720px; margin: 18px 0 9px; font-size: clamp(30px, 3vw, 48px); line-height: 1.08; letter-spacing: -.045em; }
.hero-banner p { max-width: 550px; margin: 0; color: #bdc8c4; font-size: 16px; }
.hero-banner__emblem { position: absolute; top: -220px; right: -35px; width: 690px; height: 690px; color: var(--green-500); transform: rotate(-14deg); }
.hero-banner__emblem::before, .hero-banner__emblem::after { content: ""; position: absolute; inset: 130px; border: 54px solid currentColor; border-radius: 50%; }
.hero-banner__emblem::after { inset: 214px; border-width: 31px; }
.hero-banner__emblem span { position: absolute; top: 95px; left: 50%; width: 38px; height: 500px; background: currentColor; border-radius: 50px; transform-origin: center; }
.hero-banner__emblem span:nth-child(1) { transform: rotate(0deg); }.hero-banner__emblem span:nth-child(2) { transform: rotate(36deg); }.hero-banner__emblem span:nth-child(3) { transform: rotate(72deg); }.hero-banner__emblem span:nth-child(4) { transform: rotate(108deg); }.hero-banner__emblem span:nth-child(5) { transform: rotate(144deg); }

.catalog-toolbar { display: grid; grid-template-columns: 1fr minmax(300px, 430px); gap: 18px; align-items: center; margin: 28px 0; }
.filter-pills { display: flex; gap: 8px; overflow-x: auto; padding: 4px; scrollbar-width: none; }
.filter-pill { flex: 0 0 auto; padding: 10px 15px; color: #6e7a75; background: transparent; border: 1px solid transparent; border-radius: 10px; font-size: 13px; font-weight: 600; cursor: pointer; transition: .2s ease; }
.filter-pill:hover { color: var(--ink); background: #fff; }
.filter-pill.is-active { color: var(--green-700); background: #fff; border-color: var(--line); box-shadow: var(--shadow-sm); }
.search-field { display: flex; align-items: center; gap: 11px; height: 46px; padding: 0 15px; color: #89958f; background: #e9edef; border: 1px solid transparent; border-radius: 12px; transition: .2s ease; }
.search-field:focus-within { background: #fff; border-color: var(--green-300); box-shadow: 0 0 0 4px rgba(43, 196, 138, .1); }
.search-field svg { width: 20px; height: 20px; }
.search-field input { width: 100%; color: var(--ink); background: transparent; border: 0; outline: 0; }
.search-field input::placeholder { color: #a5afab; }

.course-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.course-card { overflow: hidden; background: #fff; border: 1px solid rgba(221, 228, 225, .8); border-radius: 20px; box-shadow: 0 10px 32px rgba(18, 45, 37, .045); transition: transform .28s cubic-bezier(.22, 1, .36, 1), box-shadow .28s ease; }
.course-card:hover { transform: translateY(-6px); box-shadow: 0 22px 52px rgba(17, 55, 43, .12); }
.course-card__cover { position: relative; display: block; height: 208px; overflow: hidden; color: #fff; background: linear-gradient(135deg, #172e27, #12614a); }
.course-card__cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.course-card:hover .course-card__cover img { transform: scale(1.035); }
.course-card__cover::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(10, 30, 23, .02), rgba(10, 30, 23, .28)); }
.course-card__direction, .course-card__level { position: absolute; z-index: 2; top: 15px; padding: 6px 9px; border-radius: 8px; font-size: 10px; font-style: normal; font-weight: 700; letter-spacing: .035em; text-transform: uppercase; backdrop-filter: blur(10px); }
.course-card__direction { left: 15px; color: var(--green-950); background: rgba(225, 255, 242, .88); }
.course-card__level { right: 15px; color: #fff; background: rgba(14, 29, 24, .55); }
.course-cover-art { position: absolute; inset: 0; overflow: hidden; }
.course-cover-art::before { content: "ИБ"; position: absolute; left: 25px; bottom: 18px; z-index: 2; color: rgba(255,255,255,.95); font-size: 45px; font-weight: 800; letter-spacing: -.08em; }
.course-cover-art i { position: absolute; width: 230px; height: 230px; border: 26px solid var(--green-500); border-radius: 50%; }
.course-cover-art i:nth-child(1) { top: -130px; right: -30px; }.course-cover-art i:nth-child(2) { top: 10px; right: -135px; }.course-cover-art i:nth-child(3) { top: 74px; right: 55px; width: 100px; height: 100px; border-width: 14px; }
.course-card__body { padding: 20px; }
.course-card__meta { display: flex; justify-content: space-between; gap: 8px; color: #82908a; font-size: 11px; font-weight: 600; }
.course-card h2 { min-height: 55px; margin: 11px 0 8px; font-size: 20px; line-height: 1.35; letter-spacing: -.025em; }
.course-card h2 a:hover { color: var(--green-700); }
.course-card p { min-height: 44px; margin: 0 0 18px; color: var(--ink-soft); font-size: 13px; }
.course-progress { margin: 0 0 16px; }
.course-progress__row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 7px; color: #68756f; font-size: 11px; }
.course-progress__row strong { color: var(--green-700); }
.progress-bar { height: 7px; overflow: hidden; background: #e8eeeb; border-radius: 999px; }
.progress-bar > span { display: block; height: 100%; background: linear-gradient(90deg, var(--green-500), var(--green-600)); border-radius: inherit; transition: width .7s cubic-bezier(.22, 1, .36, 1); }

.button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 43px; padding: 10px 17px; border: 1px solid transparent; border-radius: 11px; font-size: 13px; font-weight: 700; line-height: 1; cursor: pointer; transition: transform .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease; }
.button:hover { transform: translateY(-1px); }
.button:active { transform: translateY(0); }
.button--primary { color: #fff; background: var(--green-600); box-shadow: 0 8px 20px rgba(28, 169, 119, .18); }
.button--primary:hover { background: var(--green-700); box-shadow: 0 11px 25px rgba(28, 169, 119, .24); }
.button--soft { color: var(--green-700); background: var(--green-100); }
.button--soft:hover { background: #cef0e2; }
.button--dark { color: #fff; background: var(--ink); }
.button--dark:hover { background: #2c3632; }
.button--ghost { color: #66736d; background: transparent; border-color: var(--line); }
.button--ghost:hover { color: var(--ink); background: #f5f7f6; }
.button--light { color: var(--green-900); background: #fff; }
.button--white { color: var(--ink); background: #fff; }
.button--light-outline { color: #fff; background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.22); }
.button--wide { width: 100%; }
.is-hidden { display: none !important; }

.empty-state { display: grid; justify-items: center; padding: 42px; text-align: center; color: var(--ink-soft); background: #fff; border: 1px dashed #d8dfdc; border-radius: var(--radius-lg); }
.empty-state--large { min-height: 330px; align-content: center; margin-top: 28px; }
.empty-state__icon { display: grid; place-items: center; width: 54px; height: 54px; color: var(--green-700); background: var(--green-100); border-radius: 17px; font-size: 25px; }
.empty-state h2 { margin: 15px 0 5px; font-size: 21px; }.empty-state p { max-width: 520px; margin: 0 0 18px; color: var(--muted); }

.eyebrow { display: block; color: var(--green-700); font-size: 11px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.eyebrow--light { color: var(--green-300); }
.breadcrumbs { display: flex; align-items: center; gap: 9px; margin: 0 0 18px; color: #83908a; font-size: 12px; }
.breadcrumbs a:hover { color: var(--green-700); }
.page-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 30px; margin: 10px 0 30px; }
.page-heading h1 { margin: 6px 0 5px; font-size: clamp(30px, 3vw, 43px); line-height: 1.12; letter-spacing: -.045em; }.page-heading p { margin: 0; color: var(--muted); }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin: 40px 0 18px; }
.section-heading h2 { margin: 5px 0 0; font-size: 27px; letter-spacing: -.035em; }
.section-heading--compact { margin: 0 0 20px; }.section-heading--compact h2 { font-size: 21px; }
.text-link { color: var(--green-700); font-weight: 700; }
.tag { display: inline-flex; padding: 6px 10px; color: #62706a; background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.16); border-radius: 999px; font-size: 10px; font-weight: 800; letter-spacing: .04em; text-transform: uppercase; }
.tag--green { color: var(--green-800); background: var(--green-100); border-color: transparent; }
.muted { color: var(--muted); }

.course-hero { display: grid; grid-template-columns: 1.25fr .75fr; min-height: 390px; overflow: hidden; color: #fff; background: linear-gradient(135deg, #12251f, #0d503d); border-radius: 26px; box-shadow: var(--shadow-md); }
.course-hero__copy { z-index: 1; align-self: center; padding: 48px 52px; }
.course-hero__labels { display: flex; gap: 8px; }
.course-hero h1 { max-width: 780px; margin: 20px 0 12px; font-size: clamp(34px, 4vw, 56px); line-height: 1.08; letter-spacing: -.05em; }
.course-hero__copy > p { max-width: 720px; margin: 0; color: #c3d1cc; font-size: 16px; }
.course-hero__facts { display: flex; flex-wrap: wrap; gap: 10px 28px; margin: 27px 0; color: #9fb4ad; font-size: 12px; }.course-hero__facts strong { color: #fff; }
.course-hero__progress { max-width: 470px; }.course-hero__progress > div:first-child { display: flex; justify-content: space-between; margin-bottom: 9px; font-size: 12px; }
.progress-bar--light { background: rgba(255,255,255,.13); }.progress-bar--light > span { background: var(--green-300); }
.course-hero__cover { position: relative; min-height: 390px; overflow: hidden; background: rgba(255,255,255,.04); }
.course-hero__cover img { width: 100%; height: 100%; object-fit: cover; }
.course-hero__cover::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, #174b3b 0, transparent 35%); }
.course-hero__monogram { position: absolute; z-index: 2; right: 80px; bottom: 30px; color: var(--green-300); font-size: 170px; font-weight: 800; line-height: 1; opacity: .9; }
.course-hero__rings { position: absolute; top: -100px; right: -120px; width: 480px; height: 480px; border: 65px solid var(--green-500); border-radius: 50%; opacity: .35; }.course-hero__rings::after { content: ""; position: absolute; inset: 45px; border: 28px solid var(--green-300); border-radius: 50%; }

.lesson-list { overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: 19px; }
.lesson-row { display: grid; grid-template-columns: 60px minmax(0, 1fr) auto 40px; align-items: center; gap: 16px; min-height: 86px; padding: 14px 20px; border-bottom: 1px solid #edf0ef; transition: .2s ease; }
.lesson-row:last-child { border-bottom: 0; }.lesson-row:hover { background: var(--green-50); }.lesson-row--locked:hover { background: #fff; }
.lesson-row__number { color: #a5afab; font-size: 17px; font-weight: 800; }.lesson-row__copy { display: grid; min-width: 0; }.lesson-row__copy strong { font-size: 15px; }.lesson-row__copy small { overflow: hidden; color: var(--muted); text-overflow: ellipsis; white-space: nowrap; }.lesson-row__meta { color: var(--muted); font-size: 11px; }.lesson-row__status { display: grid; place-items: center; width: 30px; height: 30px; color: #fff; background: var(--green-600); border-radius: 50%; }.lesson-row__arrow { color: var(--green-700); font-size: 20px; }.lesson-row__lock { color: #929d98; font-size: 10px; font-weight: 700; }.lesson-row.is-completed .lesson-row__number { color: var(--green-600); }

.lesson-layout { display: grid; grid-template-columns: minmax(0, 1fr) 350px; gap: 24px; width: min(1480px, 100%); margin: 0 auto; }
.lesson-content { min-width: 0; }
.lesson-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 25px; padding: 34px 38px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); }
.lesson-header h1 { margin: 6px 0; font-size: 32px; letter-spacing: -.04em; }.lesson-header p { margin: 0; color: var(--muted); }
.completed-badge { flex: 0 0 auto; padding: 8px 11px; color: var(--green-700); background: var(--green-100); border-radius: 999px; font-size: 11px; font-weight: 800; }
.material-stack { display: grid; gap: 20px; margin-top: 20px; }
.material-card { padding: 28px 32px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: 0 9px 24px rgba(30, 50, 43, .035); }
.material-card__header { display: flex; align-items: center; gap: 13px; margin-bottom: 22px; }.material-card__header small { color: var(--green-700); font-size: 10px; font-weight: 800; letter-spacing: .07em; text-transform: uppercase; }.material-card__header h2 { margin: 2px 0 0; font-size: 22px; letter-spacing: -.025em; }
.material-icon { display: grid; place-items: center; width: 44px; height: 44px; color: var(--green-700); background: var(--green-100); border-radius: 13px; font-weight: 800; }
.article-content { color: #3f4c47; font-size: 15px; line-height: 1.85; }.article-content p:first-child { margin-top: 0; }.article-content p:last-child { margin-bottom: 0; }
.lesson-video { width: 100%; max-height: 630px; background: #101513; border-radius: 15px; }
.file-row { display: flex; align-items: center; justify-content: space-between; gap: 15px; margin-top: 10px; padding: 15px 17px; color: #53615b; background: #f5f7f6; border: 1px solid #e8ecea; border-radius: 12px; transition: .2s ease; }.file-row:hover { color: var(--green-700); background: var(--green-50); border-color: #cfe9dd; }.file-row strong { color: var(--green-700); font-size: 11px; }
.quiz-intro { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 14px 16px; background: var(--green-50); border-radius: 12px; }.quiz-intro p { margin: 0; }.attempt-badge { flex: 0 0 auto; padding: 6px 9px; color: var(--warning); background: #fff3dc; border-radius: 8px; font-size: 11px; font-weight: 800; }.attempt-badge.is-passed { color: var(--green-700); background: var(--green-100); }
.quiz-form { margin-top: 24px; }.quiz-question { margin: 0; padding: 22px 0; border: 0; border-bottom: 1px solid var(--line); }.quiz-question legend { display: flex; gap: 11px; width: 100%; font-size: 15px; font-weight: 700; }.quiz-question legend > span { display: grid; flex: 0 0 auto; place-items: center; width: 26px; height: 26px; color: var(--green-700); background: var(--green-100); border-radius: 8px; font-size: 11px; }.quiz-options { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 15px; }.quiz-option { cursor: pointer; }.quiz-option input { position: absolute; opacity: 0; pointer-events: none; }.quiz-option span { display: flex; min-height: 48px; align-items: center; padding: 10px 13px; color: #58655f; background: #f5f7f6; border: 1px solid var(--line); border-radius: 11px; transition: .18s ease; }.quiz-option:hover span { border-color: var(--green-300); }.quiz-option input:checked + span { color: var(--green-800); background: var(--green-100); border-color: var(--green-500); box-shadow: 0 0 0 3px rgba(43, 196, 138, .09); }.quiz-form > .button { margin-top: 22px; }.quiz-form__note { margin-left: 12px; color: var(--muted); }
.code-placeholder { display: grid; justify-items: center; min-height: 180px; align-content: center; padding: 30px; color: #a6b1ad; background: #141b18; border-radius: 14px; text-align: center; }.code-placeholder strong { color: #e7efec; font-size: 18px; }.code-placeholder span { margin-top: 5px; }
.lesson-footer { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 25px 0; }
.program-panel { position: sticky; top: calc(var(--topbar) + 24px); align-self: start; overflow: hidden; max-height: calc(100vh - var(--topbar) - 48px); background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); }
.program-panel__head { display: grid; grid-template-columns: 1fr auto; gap: 10px; padding: 22px; border-bottom: 1px solid var(--line); }.program-panel__head span { font-weight: 700; }.program-panel__head strong { color: var(--green-700); }.program-panel__head .progress-bar { grid-column: 1 / -1; }
.program-panel__lessons { display: grid; gap: 5px; max-height: calc(100vh - 210px); overflow: auto; padding: 12px; }
.program-link { display: flex; align-items: center; gap: 11px; padding: 12px; color: #69756f; border-radius: 11px; }.program-link > span { display: grid; flex: 0 0 auto; place-items: center; width: 28px; height: 28px; background: #f1f4f2; border-radius: 8px; font-size: 10px; }.program-link strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 12px; }.program-link:hover { color: var(--green-700); background: var(--green-50); }.program-link.is-active { color: var(--green-800); background: var(--green-100); }

.library-list { display: grid; gap: 14px; }.library-card { display: grid; grid-template-columns: 180px minmax(0, 1fr) auto; align-items: center; gap: 24px; padding: 14px 20px 14px 14px; background: #fff; border: 1px solid var(--line); border-radius: 18px; transition: .22s ease; }.library-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }.library-card__cover { display: grid; place-items: center; height: 118px; overflow: hidden; color: #fff; background: linear-gradient(135deg, var(--green-900), var(--green-600)); border-radius: 13px; font-size: 44px; font-weight: 800; }.library-card__cover img { width: 100%; height: 100%; object-fit: cover; }.library-card__main h2 { margin: 8px 0 4px; font-size: 19px; }.library-card__main p { margin: 0 0 12px; color: var(--muted); font-size: 12px; }.library-card__main .course-progress { max-width: 600px; margin: 0; }

.profile-hero { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 24px; padding: 36px 42px; color: #fff; background: linear-gradient(115deg, #13231e, #0e6249); border-radius: 24px; }.profile-hero__avatar { display: grid; place-items: center; width: 92px; height: 92px; color: var(--green-800); background: #dff8ed; border: 6px solid rgba(255,255,255,.16); border-radius: 28px; font-size: 34px; font-weight: 800; }.profile-hero h1 { margin: 5px 0 2px; font-size: 35px; letter-spacing: -.045em; }.profile-hero p { margin: 0; color: #b8c8c2; }.profile-hero__score { display: grid; justify-items: end; }.profile-hero__score strong { font-size: 51px; line-height: 1; letter-spacing: -.06em; }.profile-hero__score span { color: var(--green-300); font-size: 12px; font-weight: 700; }
.profile-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 20px; }.surface-card { padding: 26px; background: #fff; border: 1px solid var(--line); border-radius: 19px; }.profile-course-list, .achievement-list { display: grid; gap: 9px; }.profile-course-list > a { display: flex; align-items: center; justify-content: space-between; gap: 15px; padding: 13px; background: #f6f8f7; border-radius: 11px; }.profile-course-list > a:hover { background: var(--green-50); }.profile-course-list > a > span:first-child { display: grid; }.profile-course-list small, .achievement small { color: var(--muted); }.profile-course-list__progress { color: var(--green-700); font-weight: 800; }.achievement { display: flex; gap: 13px; padding: 12px; background: #f8faf9; border-radius: 11px; }.achievement > span { display: grid; flex: 0 0 auto; place-items: center; width: 36px; height: 36px; color: var(--green-700); background: var(--green-100); border-radius: 10px; }.achievement > div { display: grid; }

.rating-mark { display: grid; place-items: center; width: 70px; height: 70px; color: var(--green-700); background: var(--green-100); border-radius: 22px; font-weight: 800; letter-spacing: .1em; transform: rotate(4deg); }
.leaderboard-card { overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: 20px; box-shadow: var(--shadow-sm); }.leaderboard-row { display: grid; grid-template-columns: 80px minmax(240px, 1.5fr) minmax(130px, .7fr) 100px 35px; align-items: center; gap: 16px; width: 100%; min-height: 76px; padding: 12px 22px; text-align: left; background: #fff; border: 0; border-bottom: 1px solid #edf0ef; cursor: pointer; transition: .2s ease; }.leaderboard-row:last-child { border-bottom: 0; }.leaderboard-row:not(.leaderboard-row--head):hover { z-index: 1; background: var(--green-50); transform: scale(1.003); }.leaderboard-row--head { min-height: 49px; color: #8a9691; background: #f7f9f8; font-size: 10px; font-weight: 800; letter-spacing: .07em; text-transform: uppercase; cursor: default; }.leaderboard-row.is-current { background: #f2fbf7; }.rank { display: grid; place-items: center; width: 37px; height: 37px; color: #718079; background: #f0f3f2; border-radius: 11px; font-weight: 800; }.rank--1 { color: #8f6911; background: #fff2c8; }.rank--2 { color: #5d6b76; background: #e9eef1; }.rank--3 { color: #8b5b36; background: #f7e4d5; }.student-cell { display: flex; align-items: center; gap: 12px; min-width: 0; }.student-cell > i { display: grid; flex: 0 0 auto; place-items: center; width: 42px; height: 42px; color: var(--green-700); background: var(--green-100); border-radius: 13px; font-style: normal; font-weight: 800; }.student-cell > span { display: grid; min-width: 0; }.student-cell strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }.student-cell small { color: var(--muted); }.points-cell { color: var(--green-700); font-size: 20px; }.row-arrow { color: #9aa6a1; font-size: 19px; }

.student-modal { width: min(650px, calc(100vw - 32px)); padding: 0; overflow: hidden; background: #fff; border: 0; border-radius: 22px; box-shadow: 0 40px 100px rgba(9, 31, 24, .28); }.student-modal[open] { animation: modalIn .3s cubic-bezier(.22, 1, .36, 1); }.student-modal::backdrop { background: rgba(9, 21, 17, .5); backdrop-filter: blur(4px); }.student-modal__top { position: relative; display: flex; align-items: center; gap: 16px; padding: 27px 30px; color: #fff; background: linear-gradient(120deg, #13251f, #126049); }.student-modal__top h2 { margin: 4px 0 1px; font-size: 24px; }.student-modal__top p { margin: 0; color: #bad0c8; }.student-modal__avatar { display: grid; place-items: center; width: 64px; height: 64px; color: var(--green-800); background: #dcf8eb; border-radius: 18px; font-size: 24px; font-weight: 800; }.dialog-close { display: grid; place-items: center; width: 36px; height: 36px; padding: 0; color: #708078; background: #eef2f0; border: 0; border-radius: 10px; font-size: 22px; cursor: pointer; }.student-modal__top .dialog-close { position: absolute; top: 18px; right: 18px; color: #fff; background: rgba(255,255,255,.12); }.student-modal__score { display: flex; align-items: baseline; justify-content: space-between; padding: 18px 30px; background: var(--green-50); }.student-modal__score strong { color: var(--green-700); font-size: 32px; }.student-modal > h3 { margin: 24px 30px 10px; font-size: 15px; }.modal-course-list { display: grid; gap: 10px; max-height: 340px; overflow: auto; padding: 0 30px 26px; }.modal-course { padding: 14px; border: 1px solid var(--line); border-radius: 12px; }.modal-course > div:first-child { display: flex; justify-content: space-between; gap: 20px; margin-bottom: 10px; }.modal-course > div:first-child span { color: var(--green-700); font-size: 11px; font-weight: 800; }.student-modal > .muted { padding: 0 30px 24px; }.student-modal__achievements { margin: 0; padding: 14px 30px; color: var(--muted); background: #f7f9f8; font-size: 12px; }
@keyframes modalIn { from { opacity: 0; transform: translateY(15px) scale(.97); } to { opacity: 1; transform: none; } }

.chat-page { display: grid; grid-template-rows: auto minmax(360px, 1fr) auto; width: min(1050px, 100%); height: calc(100vh - var(--topbar) - 70px); margin: 0 auto; overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: 22px; box-shadow: var(--shadow-sm); }.chat-header { display: flex; align-items: center; justify-content: space-between; padding: 22px 28px; border-bottom: 1px solid var(--line); }.chat-header h1 { margin: 4px 0 0; font-size: 25px; }.chat-header p { margin: 0; color: var(--muted); font-size: 12px; }.online-dot { color: var(--green-600); font-size: 11px; font-weight: 700; }.chat-window { overflow-y: auto; padding: 22px 28px; background: #f8faf9; }.chat-message { display: flex; gap: 10px; max-width: 74%; margin-bottom: 14px; }.chat-message.is-own { flex-direction: row-reverse; margin-left: auto; }.chat-message__avatar { display: grid; flex: 0 0 auto; place-items: center; width: 34px; height: 34px; color: var(--green-700); background: var(--green-100); border-radius: 10px; font-size: 11px; font-weight: 800; }.chat-message > div { padding: 10px 13px; background: #fff; border: 1px solid var(--line); border-radius: 5px 14px 14px; }.chat-message.is-own > div { color: #fff; background: var(--green-700); border-color: transparent; border-radius: 14px 5px 14px 14px; }.chat-message header { display: flex; gap: 14px; margin-bottom: 4px; }.chat-message header strong { font-size: 11px; }.chat-message header time { color: var(--muted); font-size: 9px; }.chat-message.is-own header time { color: #bfe3d5; }.chat-message p { margin: 0; font-size: 13px; }.chat-composer { display: grid; grid-template-columns: 1fr auto; gap: 12px; padding: 14px; border-top: 1px solid var(--line); }.chat-composer textarea { min-height: 48px; max-height: 120px; resize: vertical; padding: 13px; background: #f5f7f6; border: 1px solid transparent; border-radius: 12px; outline: 0; }.chat-composer textarea:focus { background: #fff; border-color: var(--green-300); }

.auth-body { min-height: 100vh; background: #eff3f1; }.auth-shell { display: grid; grid-template-columns: 1.05fr .95fr; min-height: 100vh; }.auth-visual { position: relative; display: flex; flex-direction: column; overflow: hidden; padding: 42px 56px; color: #fff; background: #12251f; }.auth-brand { z-index: 2; display: flex; align-items: center; gap: 11px; width: max-content; font-size: 23px; }.auth-brand .brand__mark { color: var(--green-300); background: rgba(255,255,255,.08); }.auth-visual__copy { z-index: 2; align-self: center; margin: auto 0; max-width: 650px; }.auth-visual h1 { margin: 17px 0 16px; font-size: clamp(42px, 5vw, 73px); line-height: 1.04; letter-spacing: -.06em; }.auth-visual p { max-width: 530px; color: #b6c8c1; font-size: 17px; }.auth-visual__grid { position: absolute; right: -190px; bottom: -230px; width: 650px; height: 650px; border: 85px solid var(--green-500); border-radius: 50%; opacity: .55; }.auth-visual__grid::before, .auth-visual__grid::after { content: ""; position: absolute; border: 45px solid var(--green-300); border-radius: 50%; }.auth-visual__grid::before { inset: 55px; }.auth-visual__grid::after { inset: -190px; opacity: .4; }.auth-panel { display: grid; place-items: center; padding: 40px; }.auth-card { width: min(470px, 100%); padding: 42px; background: #fff; border: 1px solid var(--line); border-radius: 24px; box-shadow: var(--shadow-md); }.auth-card h2 { margin: 7px 0 8px; font-size: 31px; letter-spacing: -.045em; }.auth-card__lead { margin: 0 0 25px; color: var(--muted); }.auth-form { display: grid; gap: 16px; }.auth-form input, .auth-form select { width: 100%; height: 49px; padding: 0 13px; background: #f6f8f7; border: 1px solid #e1e7e4; border-radius: 11px; outline: 0; transition: .2s ease; }.auth-form input:focus, .auth-form select:focus { background: #fff; border-color: var(--green-500); box-shadow: 0 0 0 4px rgba(43,196,138,.1); }.field { display: grid; gap: 7px; }.field label { color: #47544f; font-size: 12px; font-weight: 700; }.field small { color: var(--muted); }.field__error { color: var(--danger) !important; }.field--error input, .field--error select { border-color: #e59b9b; }.form-alert { margin-bottom: 16px; padding: 11px 13px; color: #9a3535; background: #fff0f0; border-radius: 10px; font-size: 12px; }.auth-card__footer { margin: 23px 0 0; color: var(--muted); text-align: center; font-size: 12px; }.auth-card__footer a { color: var(--green-700); font-weight: 800; }

@media (max-width: 1180px) {
    .topbar { grid-template-columns: 1fr auto; }.topnav { order: 3; position: fixed; right: 18px; bottom: 18px; box-shadow: var(--shadow-md); }.profile-menu { grid-column: 2; }.course-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }.lesson-layout { grid-template-columns: 1fr 310px; }.auth-visual { padding: 38px; }
}

@media (max-width: 900px) {
    :root { --sidebar: 0px; --topbar: 68px; }.sidebar { inset: auto 12px 10px; z-index: 60; width: auto; height: 62px; border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow-md); }.sidebar__nav { flex-direction: row; justify-content: center; gap: 7px; padding: 7px; }.sidebar__link { width: 48px; height: 48px; border-radius: 12px; }.sidebar__link > span, .sidebar__link.is-active::before { display: none; }.sidebar__link--management { margin: 0; }.topbar { left: 0; padding: 0 18px; }.profile-menu__text, .profile-menu__manage { display: none; }.topnav { right: 12px; bottom: 82px; }.workspace { padding: calc(var(--topbar) + 24px) 16px 100px; }.catalog-toolbar { grid-template-columns: 1fr; }.hero-banner { min-height: 240px; padding: 35px; }.hero-banner__content { width: 78%; }.hero-banner__emblem { right: -270px; }.course-hero { grid-template-columns: 1fr; }.course-hero__cover { display: none; }.lesson-layout { grid-template-columns: 1fr; }.program-panel { position: static; grid-row: 1; max-height: none; }.program-panel__lessons { display: flex; max-height: none; overflow-x: auto; }.program-link { flex: 0 0 220px; }.library-card { grid-template-columns: 125px 1fr; }.library-card > .button { grid-column: 1 / -1; }.profile-grid { grid-template-columns: 1fr; }.auth-shell { grid-template-columns: 1fr; }.auth-visual { display: none; }
}

@media (max-width: 640px) {
    .brand__name { font-size: 21px; }.profile-menu { gap: 5px; }.icon-button { display: none; }.topnav__link { min-width: 0; padding: 9px 13px; font-size: 11px; }.course-grid { grid-template-columns: 1fr; }.hero-banner { min-height: 220px; padding: 27px; }.hero-banner__content { width: 100%; }.hero-banner h1 { font-size: 30px; }.hero-banner p { font-size: 13px; }.hero-banner__emblem { opacity: .2; }.page-heading { align-items: flex-start; flex-direction: column; }.course-hero__copy { padding: 29px 24px; }.course-hero h1 { font-size: 34px; }.course-hero__facts { flex-direction: column; gap: 7px; }.lesson-row { grid-template-columns: 45px 1fr 30px; gap: 10px; }.lesson-row__meta { display: none; }.lesson-header { padding: 25px 22px; }.lesson-header { flex-direction: column; }.material-card { padding: 22px 18px; }.quiz-options { grid-template-columns: 1fr; }.lesson-footer { flex-wrap: wrap; }.library-card { grid-template-columns: 1fr; }.library-card__cover { height: 160px; }.profile-hero { grid-template-columns: auto 1fr; padding: 27px 22px; }.profile-hero__avatar { width: 65px; height: 65px; border-radius: 20px; }.profile-hero__score { grid-column: 1 / -1; justify-items: start; }.leaderboard-card { overflow-x: auto; }.leaderboard-row { min-width: 670px; }.auth-panel { padding: 16px; }.auth-card { padding: 29px 22px; }.chat-page { height: calc(100vh - 150px); }.chat-message { max-width: 90%; }
}