:root {
    --navy: #3d82c4;
    --navy-dark: #2a6aa8;
    --navy-soft: #eaf4fb;
    --red: #f44336;
    --bg: #f4f8fc;
    --text: #1a2744;
    --muted: #5b6b82;
    --white: #ffffff;
    --radius: 16px;
    --shadow: 0 12px 32px rgba(42, 106, 168, 0.12);
}

* { box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    height: 100%;
    -webkit-text-size-adjust: 100%;
    overflow-x: hidden;
}

body {
    margin: 0;
    min-height: 100%;
    display: flex;
    flex-direction: column;
    font-family: "Source Sans 3", "Segoe UI", sans-serif;
    font-size: 18px;
    line-height: 1.55;
    color: var(--text);
    background: var(--bg);
    overflow-x: hidden;
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
}

#obsah {
    flex: 1 0 auto;
}

a { color: var(--navy); }

img { max-width: 100%; height: auto; }

.container {
    width: min(1080px, 100%);
    margin: 0 auto;
    padding-left: 16px;
    padding-right: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 0;
    cursor: pointer;
    text-decoration: none;
    font-weight: 700;
    font-size: 1rem;
    border-radius: 999px;
    padding: 12px 18px;
    min-height: 44px;
    max-width: 100%;
    text-align: center;
    word-break: break-word;
}

.btn-primary { background: var(--navy); color: var(--white); }
.btn-primary:hover { background: var(--navy-dark); color: var(--white); }
.btn-secondary { background: var(--white); color: var(--navy); }
.btn-secondary:hover { background: var(--navy-soft); color: var(--navy); }
.btn-ghost {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.7);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.12); color: var(--white); }
.btn-sm { padding: 8px 14px; font-size: 0.95rem; }
.btn-block { width: 100%; margin-top: 10px; }

.hero {
    position: relative;
    background:
        linear-gradient(105deg, rgba(42, 106, 168, 0.92) 0%, rgba(42, 106, 168, 0.78) 42%, rgba(42, 106, 168, 0.35) 100%),
        url("../img/hero.webp") center / cover no-repeat;
    color: var(--white);
    padding: 56px 0 64px;
}
.hero h1,
.page-head h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1.15;
    margin: 8px 0 16px;
}
.hero__eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.85rem;
    font-weight: 700;
    margin: 0;
    opacity: 0.85;
}
.hero__lead,
.page-head__lead {
    max-width: 42rem;
    font-size: 1.15rem;
    opacity: 0.95;
}
.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
}

.page-head {
    background: var(--navy);
    color: var(--white);
    padding: 36px 0 40px;
}
.page-head a { color: #cfe4ff; }
.back-link,
.breadcrumb {
    color: #cfe4ff;
    text-decoration: none;
    font-weight: 600;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 28px;
}
.breadcrumb a { color: #cfe4ff; }
.breadcrumb span { font-weight: 500; opacity: 0.85; }

.section { padding: 48px 0; }
.section--muted { background: var(--navy-soft); }
.section-head h2 { margin: 0 0 8px; font-size: 1.8rem; color: var(--navy); }
.section-head p { margin: 0 0 24px; color: var(--muted); }

.tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 0 0 24px;
}
.tabs__item {
    display: inline-flex;
    align-items: center;
    padding: 10px 18px;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 700;
    color: var(--navy);
    background: var(--white);
    border: 2px solid #c5d8ea;
}
.tabs__item:hover { border-color: var(--navy); }
.tabs__item--active {
    background: var(--navy);
    border-color: var(--navy);
    color: var(--white);
}

.course-list { display: grid; gap: 18px; }

.pagination {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    align-items: center;
    margin-top: 28px;
}
.pagination__btn,
.pagination__page {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    min-width: 44px;
    padding: 8px 14px;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 700;
    color: var(--navy);
    background: var(--white);
    border: 2px solid #c5d8ea;
}
.pagination__btn:hover,
.pagination__page:hover {
    border-color: var(--navy);
}
.pagination__page--current {
    background: var(--navy);
    border-color: var(--navy);
    color: var(--white);
}
.pagination__btn--disabled {
    color: var(--muted);
    background: #eef3f8;
    border-color: #d5e0ea;
    cursor: default;
}
.pagination__ellipsis {
    color: var(--muted);
    padding: 0 4px;
    font-weight: 700;
}
.course-card {
    display: grid;
    grid-template-columns: 120px 1fr;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}
.course-card__date {
    background: var(--navy);
    color: var(--white);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 16px 8px;
}
.course-card__dow {
    font-size: 0.95rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}
.course-card__day { font-size: 1.5rem; font-weight: 800; }
.course-card__year,
.course-card__time { font-size: 0.9rem; opacity: 0.85; }
.course-card__body { padding: 20px 22px 22px; min-width: 0; }
.course-card__type {
    margin: 0;
    color: var(--navy);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.04em;
}
.course-card h3 { margin: 4px 0 8px; font-size: 1.35rem; overflow-wrap: anywhere; }
.course-card__desc { margin: 0 0 12px; color: var(--muted); overflow-wrap: anywhere; }
.lesson-note {
    margin: 0 0 12px;
    padding: 10px 12px;
    background: var(--navy-soft);
    color: var(--text);
    border-radius: 12px;
    overflow-wrap: anywhere;
    white-space: pre-wrap;
}
.course-card__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 16px;
    color: var(--muted);
    font-size: 0.95rem;
    margin: 0 0 14px;
}
.course-card__meta span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.detail-grid {
    display: grid;
    grid-template-columns: 1.4fr 0.8fr;
    gap: 20px;
}
.info-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
}
.info-card--accent {
    background: var(--navy);
    color: var(--white);
}
.info-card h2 { margin-top: 0; color: var(--navy); }
.info-card--accent h2 { color: #ffffff; }
.info-card--accent a { color: #ffffff; }
.info-card--accent p { margin: 0 0 12px; line-height: 1.6; }
.info-card--accent p:last-child { margin-bottom: 0; }
.facts { display: grid; gap: 14px; margin: 0 0 18px; }
.facts dt { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
.info-card--accent .facts dt { color: #b9d4ff; }
.facts dd { margin: 2px 0 0; font-weight: 700; }
.rich-text { color: var(--muted); }

.legal { max-width: 46rem; }
.legal__card h2 {
    margin: 28px 0 10px;
    font-size: 1.25rem;
}
.legal__card h2:first-child { margin-top: 0; }
.legal__card p { margin: 0 0 12px; line-height: 1.65; }
.legal__notice {
    background: var(--navy-soft);
    border-left: 4px solid var(--navy);
    border-radius: 12px;
    padding: 14px 16px;
    margin: 0 0 16px;
}
.legal__notice p { margin: 0; color: var(--text); }

.lesson-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.lesson-card {
    display: grid;
    grid-template-columns: 56px 1fr;
    gap: 12px;
    align-items: start;
    background: var(--white);
    border-radius: var(--radius);
    padding: 16px 18px;
    box-shadow: var(--shadow);
    min-width: 0;
}
.lesson-card__num {
    background: var(--navy);
    color: var(--white);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-weight: 800;
}
.lesson-card__date { font-weight: 800; margin: 0; color: var(--navy); }
.lesson-card p { margin: 4px 0 0; }
.lesson-card__meta { color: var(--muted); font-size: 0.95rem; overflow-wrap: anywhere; }
.lesson-card .lesson-note { margin: 10px 0 0; }

.empty-state {
    background: var(--white);
    border-radius: var(--radius);
    padding: 28px;
    text-align: center;
    box-shadow: var(--shadow);
}

.error-page {
    text-align: center;
    padding: 72px 16px 80px;
    max-width: 640px;
    margin: 0 auto;
}
.error-page__code {
    font-size: 5rem;
    font-weight: 800;
    color: var(--navy);
    margin: 0;
    line-height: 1;
}
.error-page__title { font-size: 2rem; margin: 12px 0; color: var(--navy); }
.error-page__text { color: var(--muted); font-size: 1.15rem; }
.error-page .btn-ghost {
    color: var(--navy);
    border-color: var(--navy);
}
.error-page .btn-ghost:hover {
    background: var(--navy-soft);
    color: var(--navy);
}

.flash {
    margin: 16px 0 0;
    padding: 12px 16px;
    border-radius: 12px;
    font-weight: 600;
}
.flash--alert-success { background: #e8f3fb; color: #1e5a8c; }
.flash--alert-danger { background: #ffebee; color: #b71c1c; }

.login-wrap { max-width: 460px; width: 100%; }
.login-card h1 { margin-top: 0; color: var(--navy); }
.login-card__lead { color: var(--muted); }
.login-form { display: grid; gap: 14px; margin-top: 20px; }
.login-form label { display: grid; gap: 6px; font-weight: 700; }
.input {
    width: 100%;
    font: inherit;
    padding: 12px 14px;
    border: 2px solid #c9d6e8;
    border-radius: 12px;
}
.input:focus {
    outline: none;
    border-color: var(--navy);
}
.login-card__hint { margin-top: 16px; color: var(--muted); font-size: 0.95rem; }

.site-footer {
    background: var(--navy-dark);
    color: #d5e4f7;
    padding: 36px 0;
    margin-top: auto;
    flex-shrink: 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.footer-title { color: var(--white); font-weight: 800; margin: 0 0 8px; }
.site-footer a { color: #d6ebfb; word-break: break-word; }
.site-footer p { margin: 0 0 10px; }
.footer-partner {
    display: inline-block;
    line-height: 0;
}
.footer-partner img {
    display: block;
    width: 100px;
    height: auto;
    border-radius: 8px;
}

@media (max-width: 900px) {
    .detail-grid,
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-grid > :last-child { grid-column: 1 / -1; }
}

@media (max-width: 800px) {
    .hero { padding: 36px 0 44px; }
    .hero__lead,
    .page-head__lead { font-size: 1.05rem; }
    .section { padding: 32px 0; }
    .section-head h2 { font-size: 1.5rem; }
    .error-page { padding: 48px 8px 56px; }
    .error-page__code { font-size: 3.5rem; }
    .error-page__title { font-size: 1.6rem; }
}

@media (max-width: 640px) {
    .course-card { grid-template-columns: 1fr; }
    .course-card__date {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 8px 14px;
        padding: 12px 16px;
        justify-content: flex-start;
    }
    .course-card__day { font-size: 1.2rem; }
    .course-card__body { padding: 16px; }
    .course-card h3 { font-size: 1.2rem; }
    .detail-grid,
    .footer-grid { grid-template-columns: 1fr; }
    .footer-grid > :last-child { grid-column: auto; }
    .hero h1,
    .page-head h1 { font-size: clamp(1.75rem, 8vw, 2.4rem); }
    .tabs { display: grid; grid-template-columns: 1fr 1fr; }
    .tabs__item { justify-content: center; padding: 12px 10px; text-align: center; }
    .pagination { gap: 6px; }
    .pagination__btn { flex: 1 1 100%; }
    .page-head { padding: 28px 0 32px; }
}

@media (max-width: 420px) {
    body { font-size: 17px; }
}