/* Clean mvp.css-inspired local stylesheet */
:root {
    --color-bg: #ffffff;
    --color-surface: #f8fafc;
    --color-border: #e2e8f0;
    --color-border-strong: #cbd5e1;
    --color-primary: #118bee;
    --color-primary-hover: #0d74c7;
    --color-accent-bg: #118bee14;
    --color-text: #0f172a;
    --color-muted: #64748b;
    --color-win: #15803d;
    --color-win-bg: #dcfce7;
    --color-loss: #b91c1c;
    --color-loss-bg: #fee2e2;
    --radius: 10px;
    --shadow-card: 0 6px 20px rgba(15, 23, 42, 0.06);
    --shadow-hover: 0 12px 28px rgba(17, 139, 238, 0.16);
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    --font-serif: Georgia, "Times New Roman", serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-sans);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

main,
footer {
    max-width: 920px;
    margin: 0 auto;
    padding: 1.5rem 1.25rem;
}

.hero {
    text-align: center;
    margin-bottom: 1.5rem;
}

.hero h1 {
    font-size: clamp(1.75rem, 3.5vw, 2.35rem);
    margin: 0.25rem 0 0.4rem;
    letter-spacing: -0.02em;
}

.hero-sub {
    margin: 0;
    color: var(--color-muted);
    font-size: 0.95rem;
}

kbd {
    display: inline-block;
    padding: 0.1rem 0.42rem;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border-strong);
    border-bottom-width: 2px;
    border-radius: 5px;
    color: var(--color-text);
}

code {
    font-family: var(--font-mono);
    font-size: 0.86em;
    background: var(--color-surface);
    padding: 0.12rem 0.35rem;
    border-radius: 4px;
    border: 1px solid var(--color-border);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
}

a:hover {
    text-decoration: underline;
}

.arena {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 1.1rem;
    margin-bottom: 1.25rem;
}

.vs-pill {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--color-surface);
    border: 1px solid var(--color-border-strong);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.8rem;
    color: var(--color-muted);
    letter-spacing: 0.05em;
}

.letter-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem 1.25rem;
    text-align: center;
    box-shadow: var(--shadow-card);
    cursor: pointer;
    transition: transform 0.14s ease, box-shadow 0.14s ease, border-color 0.14s ease;
    user-select: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.65rem;
}

.letter-card:hover,
.letter-card:focus-visible {
    transform: translateY(-3px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-hover);
    outline: none;
}

.letter-card.picked-flash {
    border-color: var(--color-primary);
    background: var(--color-accent-bg);
    transform: scale(0.985);
}

.key-hint {
    font-size: 0.74rem;
    font-weight: 600;
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.big-glyph {
    font-family: var(--font-serif);
    font-size: clamp(3.6rem, 8vw, 5.2rem);
    font-weight: 700;
    line-height: 1.05;
    color: var(--color-text);
}

.card-meta {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--color-muted);
}

.btn-pref {
    margin-top: 0.35rem;
    background: var(--color-primary);
    color: #ffffff;
    border: 2px solid var(--color-primary);
    border-radius: 7px;
    padding: 0.68rem 1.35rem;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.14s ease, border-color 0.14s ease;
    width: 100%;
    max-width: 220px;
}

.btn-pref:hover {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
}

.status-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-bottom: 2rem;
}

.match-summary {
    font-size: 0.9rem;
    color: var(--color-text);
}

.btn-secondary {
    background: #ffffff;
    color: var(--color-text);
    border: 1px solid var(--color-border-strong);
    border-radius: 6px;
    padding: 0.45rem 0.9rem;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: border-color 0.14s, color 0.14s, background 0.14s;
}

.btn-secondary:hover {
    border-color: var(--color-loss);
    color: var(--color-loss);
    background: #fff5f5;
}

.results-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.results-header h3 {
    margin: 0 0 0.35rem;
    font-size: 1.4rem;
}

.sort-hint {
    font-size: 0.82rem;
    color: var(--color-muted);
}

.formula-note {
    margin: 0.25rem 0 1.15rem;
    font-size: 0.92rem;
    color: var(--color-muted);
}

.table-wrap {
    overflow-x: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
}

table.sortable {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.93rem;
    background: #ffffff;
}

table.sortable thead th {
    background: var(--color-surface);
    color: var(--color-text);
    font-weight: 700;
    text-align: right;
    padding: 0.75rem 0.9rem;
    border-bottom: 2px solid var(--color-border);
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
    transition: background 0.12s, color 0.12s;
}

table.sortable thead th:first-child {
    text-align: left;
}

table.sortable thead th:hover {
    background: #eef4fb;
    color: var(--color-primary);
}

table.sortable thead th.is-sorted {
    color: var(--color-primary);
}

.sort-ind {
    display: inline-block;
    min-width: 0.85em;
    text-align: center;
    font-size: 0.85em;
}

table.sortable tbody td {
    padding: 0.62rem 0.9rem;
    border-bottom: 1px solid var(--color-border);
    text-align: right;
    font-family: var(--font-mono);
    transition: background-color 0.45s ease;
}

table.sortable tbody tr:last-child td {
    border-bottom: none;
}

table.sortable tbody td:first-child {
    text-align: left;
    font-family: var(--font-sans);
}

table.sortable tbody tr:hover td {
    background: #f8fbff;
}

.letter-cell {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
}

.rank-pill {
    display: inline-block;
    min-width: 2rem;
    padding: 0.1rem 0.38rem;
    border-radius: 999px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    font-family: var(--font-mono);
    font-size: 0.74rem;
    color: var(--color-muted);
    text-align: center;
}

.rank-pill.top-three {
    background: var(--color-accent-bg);
    border-color: #93c5fd;
    color: var(--color-primary);
    font-weight: 700;
}

.letter-badge {
    font-family: var(--font-serif);
    font-weight: 700;
    font-size: 1.08rem;
}

.delta-tag {
    display: inline-block;
    margin-left: 0.4rem;
    padding: 0.05rem 0.36rem;
    border-radius: 4px;
    font-size: 0.74rem;
    font-weight: 700;
}

.delta-win {
    background: var(--color-win-bg);
    color: var(--color-win);
}

.delta-loss {
    background: var(--color-loss-bg);
    color: var(--color-loss);
}

tr.row-win td {
    background-color: #f0fdf4;
}

tr.row-loss td {
    background-color: #fef2f2;
}

footer {
    text-align: center;
    color: var(--color-muted);
    padding-top: 0.5rem;
    padding-bottom: 2.5rem;
}

footer hr {
    border: 0;
    border-top: 1px solid var(--color-border);
    margin-bottom: 1rem;
}

@media (max-width: 600px) {
    .arena {
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
    }

    .vs-pill {
        display: none;
    }

    .letter-card {
        padding: 1.1rem 0.75rem;
    }

    .btn-pref {
        padding: 0.55rem 0.75rem;
        font-size: 0.9rem;
    }

    table.sortable thead th,
    table.sortable tbody td {
        padding: 0.52rem 0.55rem;
        font-size: 0.82rem;
    }
}