/* ==========================================================================
   AutoStar — платформа подготовки (личный кабинет учащегося)
   ========================================================================== */

body.platform { min-height: 100vh; display: flex; flex-direction: column; background: var(--n-50); }
.pf-container { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 1.25rem; }
@media (min-width: 768px) { .pf-container { padding: 0 2rem; } }
.pf-main { flex: 1; padding: 2rem 0 3rem; }
@media (max-width: 720px) { .is-auth .pf-main { padding-bottom: 6rem; } }

/* ───────────── Шапка ───────────── */
.pf-header { position: sticky; top: 0; z-index: 50; background: #fff; border-bottom: 1px solid var(--border); }
.pf-header__inner { display: flex; align-items: center; gap: 1.5rem; min-height: 4rem; }
.pf-header__brand { display: flex; align-items: center; gap: .9rem; text-decoration: none; flex: none; }
.pf-header__brand .logo__mark { width: 2rem; height: 2rem; }
.pf-header__brand .logo__name { font-size: 1.0625rem; }
.pf-header__product { padding-left: .9rem; border-left: 1px solid var(--border); font-size: .875rem; color: var(--text-muted); white-space: nowrap; }
.pf-header__end { display: flex; align-items: center; gap: .75rem; margin-left: auto; }

.pf-tabs { display: flex; align-items: stretch; gap: .25rem; align-self: stretch; }
.pf-tabs__link { position: relative; display: inline-flex; align-items: center; gap: .5rem; padding: 0 .85rem; color: var(--n-700); font-size: .9375rem; font-weight: 500; text-decoration: none; }
.pf-tabs__link .icon { color: var(--n-500); }
.pf-tabs__link:hover { color: var(--ink-950); }
.pf-tabs__link.is-active { color: var(--blue-700); }
.pf-tabs__link.is-active .icon { color: var(--blue-700); }
.pf-tabs__link.is-active::after { content: ""; position: absolute; left: .85rem; right: .85rem; bottom: -1px; height: 3px; border-radius: 3px 3px 0 0; background: var(--blue-700); }

.pf-user { position: relative; }
.pf-user > summary { display: flex; align-items: center; gap: .5rem; padding: .25rem .4rem .25rem .25rem; border-radius: 999px; cursor: pointer; list-style: none; }
.pf-user > summary::-webkit-details-marker { display: none; }
.pf-user > summary:hover { background: var(--n-50); }
.pf-user__name { max-width: 12rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: .9rem; font-weight: 500; }
.pf-user__menu { position: absolute; right: 0; top: calc(100% + .5rem); width: 16rem; padding: .4rem; background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); z-index: 60; }
.pf-user__head { display: grid; padding: .6rem .75rem .75rem; border-bottom: 1px solid var(--border); margin-bottom: .3rem; }
.pf-user__head span { font-size: .8125rem; color: var(--text-muted); font-family: var(--font-mono); }
.pf-user__menu a, .pf-user__menu button { display: flex; align-items: center; gap: .6rem; width: 100%; padding: .55rem .75rem; border: 0; border-radius: var(--radius-sm); background: none; color: var(--ink-800); font-size: .9rem; text-decoration: none; text-align: left; }
.pf-user__menu a:hover, .pf-user__menu button:hover { background: var(--n-50); color: var(--ink-950); }
.pf-user__menu form { margin: 0; }

@media (max-width: 900px) {
  .pf-header__product { display: none; }
  .pf-user__name { display: none; }
}
@media (max-width: 720px) {
  .pf-tabs { position: fixed; left: 0; right: 0; bottom: 0; z-index: 60; justify-content: space-around; gap: 0; padding: .35rem .25rem calc(.35rem + env(safe-area-inset-bottom)); background: #fff; border-top: 1px solid var(--border); box-shadow: 0 -4px 16px rgba(13,26,45,.06); }
  .pf-tabs__link { flex: 1; flex-direction: column; gap: .15rem; padding: .35rem .25rem; font-size: .6875rem; border-radius: var(--radius-sm); }
  .pf-tabs__link .icon { width: 1.35rem; height: 1.35rem; }
  .pf-tabs__link.is-active { background: var(--blue-50); }
  .pf-tabs__link.is-active::after { display: none; }
  .hide-xs { display: none; }
}

.pf-footer { border-top: 1px solid var(--border); background: #fff; font-size: .8125rem; color: var(--text-muted); }
.pf-footer__inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem; padding-top: 1rem; padding-bottom: 1rem; }
@media (max-width: 720px) { .is-auth .pf-footer { padding-bottom: 4.5rem; } }

/* ───────────── Заголовок страницы ───────────── */
.pf-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 1rem; margin-bottom: 1.75rem; }
.pf-head h1 { font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2rem); margin: 0; }
.pf-head p { margin: .35rem 0 0; color: var(--text-muted); }
.pf-section-title { font-size: 1.0625rem; margin: 2.25rem 0 1rem; }

/* ───────────── Вход ───────────── */
.pf-auth { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: 3rem; align-items: start; padding-top: 1.5rem; }
@media (max-width: 900px) { .pf-auth { grid-template-columns: minmax(0, 1fr); gap: 2rem; padding-top: 0; } }
.pf-auth__intro h1 { font-size: clamp(1.75rem, 1.3rem + 1.8vw, 2.5rem); line-height: 1.12; }
.pf-auth__intro .lead { font-size: 1.0625rem; color: var(--text-muted); max-width: 34rem; }
.login-card { padding: 2rem; background: #fff; border: 1px solid var(--border); border-radius: var(--radius-xl); box-shadow: var(--shadow-sm); }
.login-card h2 { font-size: 1.25rem; margin-bottom: .25rem; }
.login-card > p { color: var(--text-muted); font-size: .9375rem; margin-bottom: 1.5rem; }
.login-card .note { margin-top: 1.25rem; font-size: .8125rem; color: var(--text-muted); display: flex; gap: .5rem; }
.login-card .note .icon { margin-top: .15rem; color: var(--n-500); }

.format-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin: 2rem 0; padding: 0; list-style: none; border: 1px solid var(--border); border-radius: var(--radius-lg); background: #fff; }
.format-list li { padding: 1.1rem 1.25rem; }
.format-list li + li { border-left: 1px solid var(--border); }
.format-list strong { display: block; font-size: 1.75rem; line-height: 1.1; font-weight: 600; letter-spacing: -.02em; color: var(--ink-950); font-variant-numeric: tabular-nums; }
.format-list span { font-size: .875rem; color: var(--text-muted); }
@media (max-width: 520px) { .format-list strong { font-size: 1.35rem; } .format-list li { padding: .9rem; } }

/* ───────────── Кабинет ───────────── */
.dash-hello { display: flex; align-items: center; gap: 1rem; }
.dash-hello .avatar { width: 3rem; height: 3rem; font-size: 1.05rem; }
.dash-hello h1 { font-size: clamp(1.4rem, 1.2rem + 1vw, 1.875rem); margin: 0; }
.dash-hello p { margin: .15rem 0 0; color: var(--text-muted); font-size: .9375rem; }

.action-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr)); gap: 1rem; }
.action-card { position: relative; display: flex; flex-direction: column; gap: .75rem; padding: 1.35rem; background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); text-decoration: none; color: inherit; transition: border-color .15s, box-shadow .15s; }
a.action-card:hover, .action-card--link:hover { border-color: var(--blue-300); box-shadow: var(--shadow-md); color: inherit; }
.action-card__icon { display: inline-flex; align-items: center; justify-content: center; width: 2.75rem; height: 2.75rem; border-radius: var(--radius); background: var(--blue-50); color: var(--blue-700); border: 1px solid var(--blue-100); }
.action-card__icon .icon { width: 1.35rem; height: 1.35rem; }
.action-card--primary { background: var(--ink-900); border-color: var(--ink-900); color: #fff; }
.action-card--primary .action-card__icon { background: rgba(255,255,255,.08); color: var(--amber-400); border-color: rgba(255,255,255,.14); }
.action-card--primary h2, .action-card--primary h3 { color: #fff; }
.action-card h3 { margin: 0; font-size: 1.0625rem; }
.action-card p { margin: 0; font-size: .9rem; color: var(--text-muted); line-height: 1.5; }
.action-card--primary p { color: rgba(255,255,255,.72); }
.action-card__foot { margin-top: auto; padding-top: .5rem; display: flex; align-items: center; justify-content: space-between; gap: .75rem; flex-wrap: wrap; }

.stat-tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 170px), 1fr)); gap: 1rem; }
.stat-tile { padding: 1.1rem 1.25rem; background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); }
.stat-tile__label { font-size: .8125rem; color: var(--text-muted); }
.stat-tile__value { margin-top: .2rem; font-size: 1.625rem; font-weight: 600; letter-spacing: -.02em; line-height: 1.2; color: var(--ink-950); font-variant-numeric: tabular-nums; }
.stat-tile__value small { font-size: .9rem; font-weight: 500; color: var(--text-muted); margin-left: .2rem; letter-spacing: 0; }
.stat-tile__hint { font-size: .8125rem; color: var(--text-subtle); margin-top: .15rem; }

.panel { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); }
.panel__head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1rem 1.25rem; border-bottom: 1px solid var(--border); }
.panel__head h2 { margin: 0; font-size: 1rem; }
.panel__body { padding: 1.25rem; }
.dash-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 1.25rem; align-items: start; }
@media (max-width: 960px) { .dash-grid { grid-template-columns: minmax(0, 1fr); } }

/* ───────────── Темы ───────────── */
.modes { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 230px), 1fr)); gap: 1rem; margin-bottom: 2.5rem; }
.mode-card { display: flex; flex-direction: column; gap: .5rem; padding: 1.25rem; background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); }
.mode-card form { margin-top: auto; }
.mode-card h3 { margin: .25rem 0 0; font-size: 1rem; }
.mode-card p { margin: 0 0 .75rem; font-size: .875rem; color: var(--text-muted); }
.mode-card .icon-badge { display: inline-flex; align-items: center; justify-content: center; width: 2.4rem; height: 2.4rem; border-radius: var(--radius); background: var(--n-50); color: var(--ink-800); border: 1px solid var(--border); }

.chapter { margin-bottom: 2rem; }
.chapter__title { display: flex; align-items: baseline; gap: .75rem; margin: 0 0 .75rem; font-size: .8125rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--text-muted); }
.chapter__title span { color: var(--blue-700); font-family: var(--font-mono); letter-spacing: 0; }
.topic-list { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; }
.topic-row { display: grid; grid-template-columns: 4.5rem minmax(0, 1fr) 11rem 15.5rem; gap: 1rem; align-items: center; padding: .9rem 1.25rem; border-bottom: 1px solid var(--border); }
.topic-row:last-child { border-bottom: 0; }
.topic-row:hover { background: var(--n-25); }
.topic-row__code { font-family: var(--font-mono); font-weight: 600; font-size: .875rem; color: var(--blue-700); white-space: nowrap; }
.topic-row__title { font-weight: 500; color: var(--ink-900); line-height: 1.35; }
.topic-row__meta { font-size: .8125rem; color: var(--text-muted); margin-top: .15rem; }
.topic-row__progress { display: grid; gap: .3rem; font-size: .8125rem; color: var(--text-muted); font-variant-numeric: tabular-nums; }
.topic-row__actions { display: flex; gap: .4rem; justify-content: flex-end; }
.topic-row__actions form { margin: 0; }
@media (max-width: 860px) {
  .topic-row { grid-template-columns: 3.5rem minmax(0, 1fr); gap: .5rem 1rem; }
  .topic-row__progress { grid-column: 2; }
  .topic-row__actions { grid-column: 1 / -1; justify-content: flex-start; }
}

.lang-choice { display: inline-flex; padding: 3px; border: 1px solid var(--border-strong); border-radius: var(--radius); background: #fff; }
.lang-choice input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.lang-choice label { padding: .35rem .85rem; border-radius: calc(var(--radius) - 3px); font-size: .875rem; font-weight: 500; color: var(--n-700); cursor: pointer; }
.lang-choice input:checked + label { background: var(--ink-900); color: #fff; }
.lang-choice input:focus-visible + label { box-shadow: var(--focus-ring); }

/* ───────────── Старт экзамена ───────────── */
.start-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 24rem); gap: 1.5rem; align-items: start; }
@media (max-width: 900px) { .start-layout { grid-template-columns: minmax(0, 1fr); } }
.identity { display: grid; gap: 0; margin: 0; }
.identity div { display: grid; grid-template-columns: 9rem 1fr; gap: 1rem; padding: .75rem 0; border-bottom: 1px solid var(--border); }
.identity div:last-child { border-bottom: 0; }
.identity dt { color: var(--text-muted); font-size: .9rem; }
.identity dd { margin: 0; font-weight: 600; color: var(--ink-950); }
.rules { margin: 0; padding: 0; list-style: none; display: grid; gap: .75rem; }
.rules li { display: flex; gap: .75rem; font-size: .9375rem; line-height: 1.5; }
.rules li .icon { color: var(--blue-700); margin-top: .2rem; }

/* ───────────── Результат ───────────── */
.result-hero { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 1.5rem; align-items: center; padding: 1.75rem; background: #fff; border: 1px solid var(--border); border-radius: var(--radius-xl); }
.result-hero--passed { border-top: 4px solid var(--green-600); }
.result-hero--failed { border-top: 4px solid var(--red-600); }
.result-hero__mark { display: inline-flex; align-items: center; justify-content: center; width: 4rem; height: 4rem; border-radius: 50%; }
.result-hero--passed .result-hero__mark { background: var(--green-50); color: var(--green-700); }
.result-hero--failed .result-hero__mark { background: var(--red-50); color: var(--red-700); }
.result-hero--neutral .result-hero__mark { background: var(--blue-50); color: var(--blue-700); }
.result-hero__mark .icon { width: 2rem; height: 2rem; }
.result-hero h1 { margin: 0 0 .25rem; font-size: clamp(1.4rem, 1.2rem + 1vw, 1.875rem); }
.result-hero p { margin: 0; color: var(--text-muted); }
.result-hero__score { text-align: right; }
.result-hero__score strong { display: block; font-size: 2.5rem; font-weight: 700; letter-spacing: -.03em; line-height: 1; font-variant-numeric: tabular-nums; }
.result-hero__score span { font-size: .875rem; color: var(--text-muted); }
@media (max-width: 640px) {
  .result-hero { grid-template-columns: auto 1fr; }
  .result-hero__score { grid-column: 1 / -1; text-align: left; display: flex; align-items: baseline; gap: .6rem; }
}
.result-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 150px), 1fr)); gap: 1rem; margin: 1.25rem 0 2rem; }


/* Раздел тестов до ввода кода: форма и описание режимов */
.tests-locked { display: grid; grid-template-columns: minmax(0, 28rem) minmax(0, 1fr); gap: 2rem; align-items: start; }
.tests-locked .login-card { max-width: none; margin: 0; }
.tests-inside { padding: 1.75rem; border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--n-25); }
.tests-inside h2 { margin: 0 0 1.1rem; font-size: 1.05rem; }
.tests-inside ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 1rem; }
.tests-inside li { display: flex; gap: .85rem; align-items: flex-start; }
.tests-inside li strong { display: block; font-weight: 600; color: var(--ink-950); }
.tests-inside li span:not(.tests-inside__icon) { display: block; font-size: .9rem; color: var(--text-muted); line-height: 1.45; }
.tests-inside__icon { flex: none; display: grid; place-items: center; width: 2.25rem; height: 2.25rem; border-radius: var(--radius); background: #fff; border: 1px solid var(--border); color: var(--blue-700); }
.tests-inside__note { display: flex; gap: .5rem; align-items: flex-start; margin: 1.25rem 0 0; padding-top: 1rem; border-top: 1px solid var(--border); font-size: .875rem; color: var(--text-muted); }
.tests-inside__note .icon { flex: none; margin-top: .15rem; color: var(--blue-700); }
@media (max-width: 860px) { .tests-locked { grid-template-columns: minmax(0, 1fr); } }

/* Ссылка для сотрудников под формой входа учащихся — неброская */
.login-card__staff { display: flex; align-items: center; justify-content: center; gap: .4rem; margin-top: 1.25rem; padding-top: 1rem; border-top: 1px solid var(--border); font-size: .8125rem; color: var(--text-muted); text-decoration: none; }
.login-card__staff .icon { width: .95rem; height: .95rem; color: var(--n-500); }
.login-card__staff:hover { color: var(--blue-700); }
.login-card__staff:hover .icon { color: var(--blue-700); }