:root {
    --bg: #f6f7f9;
    --surface: #ffffff;
    --text: #17202a;
    --muted: #657282;
    --line: #dfe4ea;
    --primary: #0f766e;
    --primary-dark: #0b5f59;
    --danger: #b42318;
    --ok-bg: #e7f7ef;
    --error-bg: #fdecec;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.5;
}

a {
    color: inherit;
}

.topbar {
    align-items: center;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    display: flex;
    justify-content: space-between;
    min-height: 68px;
    padding: 0 32px;
}

.brand {
    color: var(--primary-dark);
    font-size: 20px;
    font-weight: 700;
    text-decoration: none;
}

.topbar nav {
    align-items: center;
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
}

.topbar nav a,
.link-button {
    background: transparent;
    border: 0;
    color: var(--muted);
    cursor: pointer;
    font: inherit;
    text-decoration: none;
}

main {
    margin: 0 auto;
    max-width: 1180px;
    padding: 32px;
}

.hero {
    align-items: end;
    background: linear-gradient(135deg, #0f766e, #203a43);
    color: #ffffff;
    display: flex;
    min-height: 260px;
    padding: 42px;
}

.hero h1 {
    font-size: 42px;
    line-height: 1.1;
    margin: 0;
    max-width: 760px;
}

.eyebrow,
.meta,
.capacity,
.note {
    color: var(--muted);
    font-size: 14px;
    margin: 0 0 10px;
}

.hero .eyebrow {
    color: #d7fff9;
}

.grid {
    display: grid;
    gap: 22px;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    margin-top: 24px;
}

.content-band {
    margin-top: 28px;
}

.section-title {
    margin-bottom: 16px;
}

.section-title h2 {
    font-size: 28px;
    margin: 0 0 6px;
}

.section-title p {
    color: var(--muted);
    margin: 0;
}

.news-list {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.news-item {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 20px;
}

.news-item h3 {
    font-size: 18px;
    margin: 0 0 8px;
}

.news-item p:last-child {
    margin-bottom: 0;
}

.content-editor-grid {
    display: grid;
    gap: 14px;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.course-card,
.panel,
.auth-panel,
.booking-row {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 8px;
}

.course-card {
    display: grid;
    gap: 20px;
    padding: 24px;
}

.course-card h2,
.booking-row h2,
.stacked h2 {
    font-size: 20px;
    margin: 0 0 10px;
}

.panel,
.auth-panel {
    padding: 28px;
}

.narrow {
    max-width: 720px;
}

.auth-panel {
    margin: 48px auto;
    max-width: 460px;
}

.split {
    display: grid;
    gap: 24px;
    grid-template-columns: minmax(280px, 360px) 1fr;
}

.admin-layout {
    align-items: start;
    display: grid;
    gap: 14px;
    grid-template-columns: 220px minmax(0, 1fr);
    font-size: 10px;
}

.admin-sidebar {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
    position: sticky;
    top: 24px;
}

.admin-sidebar-header {
    border-bottom: 1px solid var(--line);
    padding: 12px;
}

.admin-sidebar-header h2 {
    font-size: 10px;
    margin: 0;
}

.admin-nav {
    display: grid;
    padding: 8px;
}

.admin-nav a {
    border-radius: 6px;
    color: var(--text);
    display: grid;
    gap: 2px;
    padding: 8px;
    text-decoration: none;
}

.admin-nav a:hover,
.admin-nav a.active {
    background: #edf7f5;
    color: var(--primary-dark);
}

.admin-nav span {
    font-weight: 700;
}

.admin-nav small {
    color: var(--muted);
    font-size: 10px;
}

.admin-main {
    display: grid;
    gap: 12px;
    min-width: 0;
}

.admin-page-header {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 14px;
}

.admin-page-header h1 {
    font-size: 10px;
    margin: 0 0 4px;
}

.admin-page-header p {
    color: var(--muted);
    margin: 0;
}

.admin-main .panel {
    padding: 14px;
}

.admin-main .panel h1 {
    font-size: 10px;
    margin-top: 0;
}

.admin-main .panel h2,
.admin-main .stacked h2 {
    font-size: 10px;
}

.admin-main label,
.admin-main input,
.admin-main textarea,
.admin-main select,
.admin-main button,
.admin-main table,
.admin-main .link-button {
    font-size: 10px;
}

.admin-main input,
.admin-main textarea,
.admin-main select,
.admin-main button {
    min-height: 32px;
    padding: 6px 8px;
}

.admin-main th,
.admin-main td {
    padding: 7px 8px;
}

.admin-main .split,
.admin-main .content-editor-grid {
    grid-template-columns: 1fr;
}

.admin-main .booking-row {
    align-items: stretch;
    grid-template-columns: 1fr;
}

.table-row-form {
    display: block;
}

.admin-bookings-table select {
    min-width: 112px;
}

.admin-bookings-table textarea {
    min-width: 160px;
}

.admin-bookings-table button {
    min-width: 54px;
}

.muted {
    color: var(--muted);
}

.table-check {
    white-space: nowrap;
}

.modal[hidden] {
    display: none;
}

.modal {
    align-items: flex-start;
    background: rgba(23, 32, 42, 0.42);
    display: flex;
    inset: 0;
    justify-content: center;
    overflow: auto;
    padding: 36px 16px;
    position: fixed;
    z-index: 20;
}

.modal-dialog {
    background: var(--surface);
    border-radius: 8px;
    box-shadow: 0 18px 60px rgba(23, 32, 42, 0.22);
    max-width: 620px;
    padding: 14px;
    width: min(100%, 620px);
}

.modal-header {
    align-items: center;
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
}

.modal-header h2 {
    font-size: 10px;
    margin: 0;
}

.icon-button {
    align-items: center;
    background: transparent;
    color: var(--muted);
    display: inline-flex;
    font-size: 18px;
    font-weight: 400;
    justify-content: center;
    min-height: 26px;
    padding: 0;
    width: 26px;
}

.icon-button:hover {
    background: var(--bg);
    color: var(--text);
}

form,
.stacked,
.booking-form {
    display: grid;
    gap: 14px;
}

.inline {
    display: inline;
}

.actions {
    align-items: center;
    display: flex;
    gap: 12px;
}

.danger-link {
    color: var(--danger);
    min-height: auto;
    padding: 0;
}

label {
    color: var(--muted);
    display: grid;
    font-size: 14px;
    gap: 6px;
}

input,
textarea,
select {
    border: 1px solid var(--line);
    border-radius: 6px;
    color: var(--text);
    font: inherit;
    min-height: 42px;
    padding: 9px 11px;
    width: 100%;
}

textarea {
    resize: vertical;
}

button {
    background: var(--primary);
    border: 0;
    border-radius: 6px;
    color: #ffffff;
    cursor: pointer;
    font: inherit;
    font-weight: 700;
    min-height: 42px;
    padding: 10px 16px;
}

.button-link {
    align-items: center;
    background: var(--primary);
    border-radius: 6px;
    color: #ffffff;
    display: inline-flex;
    font-weight: 700;
    justify-content: center;
    min-height: 42px;
    padding: 10px 16px;
    text-decoration: none;
}

.button-link:hover {
    background: var(--primary-dark);
}

button:hover {
    background: var(--primary-dark);
}

.check {
    align-items: center;
    display: flex;
    gap: 8px;
}

.check input {
    min-height: auto;
    width: auto;
}

.flash {
    border-radius: 8px;
    margin-bottom: 18px;
    padding: 12px 14px;
}

.flash.success {
    background: var(--ok-bg);
    color: #11633e;
}

.flash.error {
    background: var(--error-bg);
    color: var(--danger);
}

.table-wrap {
    overflow-x: auto;
}

.section-header {
    align-items: center;
    display: flex;
    gap: 16px;
    justify-content: space-between;
    margin-bottom: 18px;
}

.section-header p {
    margin: 0;
}

table {
    border-collapse: collapse;
    width: 100%;
}

th,
td {
    border-bottom: 1px solid var(--line);
    padding: 12px;
    text-align: left;
    vertical-align: top;
}

th {
    color: var(--muted);
    font-size: 13px;
    text-transform: uppercase;
}

.lookup-form {
    align-items: end;
    display: grid;
    gap: 14px;
    grid-template-columns: 1fr auto;
    margin-bottom: 24px;
}

.booking-list {
    display: grid;
    gap: 14px;
}

.booking-row {
    align-items: end;
    display: grid;
    gap: 14px;
    grid-template-columns: 1fr 150px 170px auto auto;
    padding: 18px;
}

@media (max-width: 720px) {
    .topbar {
        align-items: flex-start;
        flex-direction: column;
        gap: 12px;
        padding: 18px;
    }

    main {
        padding: 18px;
    }

    .hero {
        min-height: 220px;
        padding: 28px;
    }

    .hero h1 {
        font-size: 30px;
    }

    .split,
    .admin-layout,
    .lookup-form,
    .booking-row {
        grid-template-columns: 1fr;
    }

    .admin-sidebar {
        position: static;
    }

    .admin-nav {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}