:root {
    --bg: #f6f6f2;
    --bg-soft: #eeeeea;
    --panel: #ffffff;
    --panel-strong: #fafaf7;
    --ink: #111111;
    --muted: #686868;
    --line: #deded8;
    --line-strong: #c9c9c1;
    --accent: #b11226;
    --accent-dark: #7f0e1c;
    --accent-soft: #f8e7ea;
    --blue: #315f9f;
    --blue-dark: #254978;
    --green: #18734d;
    --red: #b42332;
    --gold: #8a5a12;
    --code: #f7f8f6;
    --radius: 7px;
    --content: 860px;
    --content-wide: 1080px;
    --content-narrow: 700px;
}

* {
    box-sizing: border-box;
}

body.app-body {
    min-height: 100vh;
    margin: 0;
    background: linear-gradient(180deg, rgba(248, 231, 234, 0.5), rgba(246, 246, 242, 0) 16rem), var(--bg);
    color: var(--ink);
    font-family:
        Inter,
        ui-sans-serif,
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    letter-spacing: 0;
}

a {
    color: inherit;
}

.app-shell {
    min-height: 100vh;
}

.app-topbar {
    position: sticky;
    top: 0;
    z-index: 30;
    border-bottom: 1px solid rgba(201, 201, 193, 0.82);
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(14px);
}

.app-topbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    width: min(100% - 2rem, var(--content-wide));
    margin: 0 auto;
    padding: 0.75rem 0;
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--ink);
    font-size: 0.98rem;
    font-weight: 650;
    text-decoration: none;
}

.brand-icon {
    width: 1.75rem;
    height: 1.75rem;
    border-radius: 999px;
    object-fit: cover;
}

.app-nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    gap: 0.15rem;
}

.nav-link,
.nav-button {
    border: 0;
    border-radius: var(--radius);
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    font: inherit;
    font-size: 0.92rem;
    font-weight: 520;
    padding: 0.5rem 0.64rem;
    text-decoration: none;
}

.nav-link:hover,
.nav-button:hover {
    background: var(--bg-soft);
    color: var(--ink);
}

.app-content {
    width: min(100% - 2rem, var(--content));
    margin: 0 auto;
    padding: 1.4rem 0 4rem;
}

.app-content.narrow {
    width: min(100% - 2rem, var(--content-narrow));
}

.app-content.wide {
    width: min(100% - 2rem, var(--content-wide));
}

.back-link-row {
    width: 100%;
    margin: 0 0 0.9rem;
}

.back-link {
    gap: 0.5rem;
}

.back-link.btn {
    min-height: 2rem;
    border-color: transparent;
    background: transparent;
    color: var(--ink);
    font-size: 0.9rem;
    font-weight: 560;
    padding: 0.3rem 0.45rem 0.3rem 0;
}

.back-link.btn:hover {
    border-color: transparent;
    background: transparent;
    color: var(--accent-dark);
}

.back-link-icon {
    width: 1.15rem;
    height: 1.15rem;
    transition: transform 0.15s ease;
}

.back-link:hover .back-link-icon {
    transform: translateX(-2px);
}

.page {
    display: grid;
    gap: 1.15rem;
}

.narrow {
    max-width: 700px;
    width: 100%;
}

.page-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.5rem 0 1rem;
    border-bottom: 1px solid var(--line);
}

.contest-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) max-content;
    align-items: flex-start;
    column-gap: 1.25rem;
}

.panel-body.contest-timing-panel {
    align-self: flex-start;
    justify-self: end;
    max-width: min(100%, 48rem);
    min-width: min(100%, 18rem);
    padding: 0 1rem 0.55rem;
    text-align: right;
    width: max-content;
}

.contest-timing-panel .section-note {
    line-height: 1.2;
    margin: 0 0 0.35rem;
}

.contest-timing-panel #contest-timing {
    font-size: 1.08rem !important;
    line-height: 1.35;
}

.page-kicker {
    margin: 0 0 0.35rem;
    color: var(--accent-dark);
    font-size: 0.78rem;
    font-weight: 650;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.page-title {
    margin: 0;
    color: var(--ink);
    font-size: clamp(1.75rem, 2.7vw, 2.35rem);
    font-weight: 650;
    line-height: 1.12;
}

.page-subtitle {
    max-width: 38rem;
    margin: 0.42rem 0 0;
    color: var(--muted);
    font-size: 0.98rem;
    line-height: 1.55;
}

.panel {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 1px 2px rgba(23, 36, 31, 0.04);
}

.panel-body {
    padding: 1rem;
}

.section-heading {
    margin: 0;
    color: var(--ink);
    font-size: 1.05rem;
    font-weight: 640;
    line-height: 1.25;
}

.section-note {
    margin: 0.25rem 0 0;
    color: var(--muted);
    font-size: 0.92rem;
    line-height: 1.45;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 0.9rem;
}

.field-label,
#main-section label {
    display: block;
    margin-bottom: 0.38rem;
    color: var(--ink);
    font-size: 0.86rem !important;
    font-weight: 610 !important;
    line-height: 1.3;
}

#main-section input:not([type="checkbox"]):not([type="file"]),
#main-section select,
#main-section textarea {
    width: 100%;
    border: 1px solid var(--line-strong) !important;
    border-radius: var(--radius) !important;
    background: #fff !important;
    color: var(--ink) !important;
    font-size: 0.94rem !important;
    line-height: 1.45 !important;
    padding: 0.58rem 0.68rem !important;
    outline: none;
    transition:
        border-color 0.15s ease,
        box-shadow 0.15s ease;
}

#main-section input:focus,
#main-section select:focus,
#main-section textarea:focus {
    border-color: rgba(177, 18, 38, 0.78) !important;
    box-shadow: 0 0 0 3px rgba(177, 18, 38, 0.12) !important;
}

#main-section textarea {
    min-height: 7rem;
}

.btn,
#main-section button:not(.se-btn):not(.se-dialog button),
#main-section input[type="submit"] {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.35rem;
    border: 1px solid transparent;
    border-radius: var(--radius);
    background: var(--ink);
    color: #fff;
    cursor: pointer;
    font-size: 0.94rem;
    font-weight: 610;
    padding: 0.48rem 0.78rem;
    text-decoration: none;
    transition:
        background-color 0.15s ease,
        border-color 0.15s ease,
        box-shadow 0.15s ease;
}

.btn:hover,
#main-section button:not(.se-btn):not(.se-dialog button):hover {
    background: #000;
}

#main-section .btn-primary,
#main-section button.btn-primary:not(.se-btn):not(.se-dialog button),
.btn-primary {
    background: var(--accent);
}

#main-section .btn-primary:hover,
#main-section button.btn-primary:not(.se-btn):not(.se-dialog button):hover,
.btn-primary:hover {
    background: var(--accent-dark);
}

.btn-secondary {
    border-color: var(--line-strong);
    background: var(--panel);
    color: var(--ink);
}

.btn-secondary:hover {
    background: var(--bg-soft);
}

#main-section .btn-danger,
#main-section button.btn-danger:not(.se-btn):not(.se-dialog button),
.btn-danger {
    background: var(--red);
}

#main-section .btn-danger:hover,
#main-section button.btn-danger:not(.se-btn):not(.se-dialog button):hover,
.btn-danger:hover {
    background: #8f1d2a;
}

#main-section button.bg-red-500:not(.se-btn),
#main-section button.bg-red-600:not(.se-btn),
#main-section button.bg-red-700:not(.se-btn) {
    background: var(--red);
}

#main-section button.bg-red-500:not(.se-btn):hover,
#main-section button.bg-red-600:not(.se-btn):hover,
#main-section button.bg-red-700:not(.se-btn):hover {
    background: #8f1d2a;
}

.badge {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: var(--panel-strong);
    color: var(--muted);
    font-size: 0.76rem;
    font-weight: 560;
    padding: 0.2rem 0.5rem;
}

.badge-blue {
    border-color: rgba(49, 95, 159, 0.25);
    background: rgba(49, 95, 159, 0.08);
    color: var(--blue-dark);
}

.badge-gold {
    border-color: rgba(138, 90, 18, 0.25);
    background: rgba(138, 90, 18, 0.08);
    color: var(--gold);
}

.list {
    display: grid;
    gap: 0.55rem;
}

.list-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.92);
    color: var(--ink);
    padding: 0.78rem 0.9rem;
    text-decoration: none;
    box-shadow: 0 1px 2px rgba(23, 36, 31, 0.035);
}

.list-row:hover {
    border-color: rgba(177, 18, 38, 0.24);
    background: #fff;
}

.id-pill {
    display: grid;
    min-width: 2.25rem;
    height: 2.25rem;
    place-items: center;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--accent-soft);
    color: var(--accent-dark);
    font-weight: 650;
}

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

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

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

.data-table th {
    border-bottom: 1px solid var(--line);
    color: var(--muted);
    font-size: 0.76rem;
    font-weight: 650;
    padding: 0.62rem;
    text-align: left;
    text-transform: uppercase;
}

.data-table td {
    border-bottom: 1px solid var(--line);
    padding: 0.72rem 0.62rem;
}

.club-management-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 12.5rem;
    align-items: start;
    gap: 1.1rem;
}

.club-management-main {
    display: grid;
    gap: 0.9rem;
    min-width: 0;
}

.club-management-side {
    display: grid;
    gap: 0.6rem;
    padding-top: 1.25rem;
}

.club-management-danger {
    grid-column: 1 / -1;
    border-top: 1px solid var(--line);
    padding-top: 1rem;
}

.club-control-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 0.75rem;
}

.club-code-row {
    grid-template-columns: minmax(9rem, 12rem) auto auto;
    justify-content: start;
}

.club-control-row-email {
    display: grid;
    gap: 0.65rem;
}

.club-control-row-email textarea {
    min-height: 5rem !important;
}

.club-control-row-email button {
    width: fit-content;
}

.club-control-row button {
    min-width: 7.5rem;
    white-space: nowrap;
}

#main-section button.club-roster-summary:not(.se-btn) {
    display: grid;
    grid-template-columns: 8rem 2.25rem;
    align-items: center;
    justify-content: center;
    min-height: 3.25rem !important;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.72) !important;
    color: var(--ink) !important;
    gap: 0.55rem;
    padding: 0.55rem 0.62rem !important;
    text-align: left;
    width: 100%;
}

#main-section button.club-roster-summary:not(.se-btn):hover {
    border-color: rgba(177, 18, 38, 0.24);
    background: #fff !important;
}

.club-roster-summary > span:first-child {
    display: grid;
    gap: 0.16rem;
    justify-items: start;
    min-width: 0;
    width: 8rem;
}

.club-roster-summary .badge {
    height: 2rem;
    justify-self: end;
    justify-content: center;
    min-width: 2rem;
    padding: 0;
    width: 2rem;
}

.club-roster-summary strong {
    font-size: 0.84rem;
    font-weight: 640;
}

.club-roster-summary .muted {
    font-size: 0.8rem;
}

.club-modal {
    width: min(100% - 2rem, 560px);
    max-height: min(42rem, 90vh);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--panel);
    color: var(--ink);
    padding: 1rem;
    box-shadow: 0 24px 60px rgba(17, 17, 17, 0.18);
}

.club-modal::backdrop {
    background: rgba(17, 17, 17, 0.28);
}

.club-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.9rem;
}

.club-modal .club-roster-list {
    max-height: min(28rem, 62vh);
}

.club-roster-empty {
    margin: 0;
    color: var(--muted);
    font-size: 0.9rem;
}

.club-roster-list {
    display: grid;
    align-content: start;
    max-height: 16rem;
    gap: 0.42rem;
    overflow-y: auto;
    padding-right: 0.2rem;
}

.club-roster-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.5rem;
    border-radius: 6px;
    background: var(--panel-strong);
    padding: 0.45rem 0.5rem;
}

.club-roster-item > span:first-child {
    min-width: 0;
    overflow: hidden;
    font-size: 0.86rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.club-roster-item .btn {
    min-height: 1.85rem;
    padding: 0.22rem 0.48rem;
    font-size: 0.76rem;
}

@media (max-width: 860px) {
    .club-management-layout {
        grid-template-columns: 1fr;
    }

    .club-control-row,
    .club-code-row,
    .club-control-row-email {
        grid-template-columns: 1fr;
        justify-content: stretch;
    }

    .club-control-row button {
        width: fit-content;
    }

    .club-management-side {
        grid-template-columns: 1fr;
    }

    .club-modal-header {
        align-items: stretch;
        flex-direction: column;
    }
}

.problem-prose {
    color: var(--ink);
    line-height: 1.65;
}

.problem-page {
    max-width: var(--content);
    margin: 0 auto;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.94);
    color: var(--ink);
    padding: 1.8rem;
}

.problem-title {
    margin: 0 0 0.95rem;
    text-align: center;
    font-size: 1.75rem;
    font-weight: 650;
}

.problem-section {
    margin: 1.15rem 0;
    line-height: 1.65;
}

.problem-page #result:empty + .problem-section {
    margin-top: 0;
}

.problem-section h2 {
    margin: 0 0 0.42rem;
    font-size: 1rem;
    font-weight: 640;
}

.problem-section .katex-display {
    margin: 0.85rem 0;
    text-align: center;
}

.problem-section .katex {
    color: var(--ink);
}

.problem-section .__se__katex.katex {
    font-size: 1em;
}

.sample-block {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--code);
    color: var(--ink);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    padding: 0.78rem;
    white-space: pre-wrap;
}

#container {
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    overflow: hidden;
    background: #fff;
}

#editor {
    min-height: 360px;
}

#result {
    margin-bottom: 1rem;
}

#result:empty {
    display: none;
}

.sun-editor,
.se-wrapper,
.se-toolbar {
    border-color: var(--line-strong) !important;
}

.sun-editor {
    border-radius: var(--radius) !important;
    overflow: hidden;
}

details.panel summary {
    color: var(--ink);
}

@media (max-width: 720px) {
    .app-topbar-inner,
    .page-header {
        align-items: stretch;
        flex-direction: column;
    }

    .app-nav {
        justify-content: flex-start;
    }

    .contest-header {
        grid-template-columns: 1fr;
    }

    .contest-timing-panel {
        justify-self: stretch;
        text-align: left;
        width: 100%;
    }

    .app-content,
    .app-content.narrow,
    .app-content.wide {
        width: min(100% - 1.5rem, 960px);
        padding-top: 1rem;
    }

    .problem-page {
        padding: 1.05rem;
    }
}

#main-section .text-white,
#main-section .text-gray-100 {
    color: var(--ink) !important;
}

#main-section .text-gray-200,
#main-section .text-gray-300,
#main-section .text-gray-400 {
    color: var(--muted) !important;
}

#main-section .text-blue-200,
#main-section .text-blue-300,
#main-section .text-blue-400,
#main-section .text-blue-700 {
    color: var(--blue-dark) !important;
}

#main-section .text-green-400,
#main-section .text-green-700 {
    color: var(--green) !important;
}

#main-section .text-yellow-200,
#main-section .text-yellow-300,
#main-section .text-yellow-700 {
    color: var(--gold) !important;
}

#main-section .bg-gray-900,
#main-section .bg-gray-800,
#main-section .bg-gray-700,
#main-section .bg-gray-600,
#main-section .bg-gray-500 {
    background: var(--panel) !important;
}

#main-section .border-gray-700,
#main-section .border-gray-600,
#main-section .border-gray-500 {
    border-color: var(--line) !important;
}

#main-section .rounded-xl,
#main-section .rounded-2xl,
#main-section .rounded-lg {
    border-radius: var(--radius) !important;
}

#main-section .shadow-2xl,
#main-section .shadow-xl,
#main-section .shadow-lg {
    box-shadow: none !important;
}