:root {
    --o2-primary: #3b2f8f;
    --o2-primary-dark: #2c2270;
    --o2-accent: #f5a623;
    --o2-ink: #1d1b2e;
    --o2-muted: #6b6880;
    --o2-surface: #ffffff;
    --o2-bg: #f5f4fb;
    --o2-border: #e3e1ef;
    --o2-board-light: #efe9d8;
    --o2-board-dark: #6f5d3e;
}

html, body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    color: var(--o2-ink);
}

a, .btn-link {
    color: var(--o2-primary);
}

.btn-primary {
    color: #fff;
    background-color: var(--o2-primary);
    border-color: var(--o2-primary-dark);
}

.btn-primary:hover, .btn-primary:focus {
    background-color: var(--o2-primary-dark);
    border-color: var(--o2-primary-dark);
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

.content {
    padding-top: 1.1rem;
}

h1:focus {
    outline: none;
}

.valid.modified:not([type=checkbox]) {
    outline: 1px solid #26b050;
}

.invalid {
    outline: 1px solid #e50000;
}

.validation-message {
    color: #e50000;
}

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, #b32121;
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
}

    .blazor-error-boundary::after {
        content: "An error has occurred."
    }

.darker-border-checkbox.form-check-input {
    border-color: #929292;
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
    text-align: start;
}

/* Language dropdown in the top nav */
.lang-dd { background: rgba(255,255,255,.15); color: #fff; border: 1px solid rgba(255,255,255,.35); border-radius: 6px; padding: 2px 8px; font-size: .8rem; cursor: pointer; margin-right: .25rem; }
.lang-dd option { color: #1d1b2e; }

/* ===== 1on2 game UI ===== */

.hero {
    background: linear-gradient(135deg, var(--o2-primary) 0%, var(--o2-primary-dark) 100%);
    color: #fff;
    border-radius: 16px;
    padding: 3rem 1.5rem;
    margin: 1rem 0 2rem;
    text-align: center;
}

.hero-inner { max-width: 640px; margin: 0 auto; }
.hero-wordmark { height: 64px; margin-bottom: 1rem; }
.hero-tagline { font-size: 1.4rem; font-weight: 600; margin-bottom: .75rem; }
.hero-sub { color: rgba(255,255,255,.85); margin-bottom: 1.5rem; }
.hero-cta { display: flex; gap: .75rem; justify-content: center; flex-wrap: wrap; }
.hero-cta .btn-outline-secondary { color: #fff; border-color: rgba(255,255,255,.6); }
.hero-cta .btn-outline-secondary:hover { background: rgba(255,255,255,.15); }

.section-title, .dashboard-title { font-size: 1.5rem; font-weight: 700; margin-bottom: 1rem; }
.games-preview, .dashboard { max-width: 1000px; margin: 0 auto 2rem; padding: 0 1rem; }
.games-note { color: var(--o2-muted); margin-top: 1rem; }

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1rem;
}

.game-card {
    background: var(--o2-surface);
    border: 1px solid var(--o2-border);
    border-radius: 14px;
    padding: 1.25rem;
    box-shadow: 0 2px 6px rgba(29,27,46,.05);
    display: flex;
    flex-direction: column;
    transition: transform .12s ease, box-shadow .12s ease;
}
.game-card:hover { transform: translateY(-2px); box-shadow: 0 8px 18px rgba(29,27,46,.10); }
.game-card-icon { width: 56px; height: 56px; margin-bottom: .5rem; }
.game-card-title { font-size: 1.2rem; font-weight: 700; margin: 0 0 .25rem; }
.game-card-tagline { color: var(--o2-muted); flex: 1; margin-bottom: 1rem; }
.game-card-layout {
    align-self: flex-start; font-size: .8rem; font-weight: 600;
    background: var(--o2-bg); color: var(--o2-primary);
    padding: .15rem .55rem; border-radius: 999px;
}
.game-card-actions { display: flex; gap: .5rem; align-items: center; }

/* My games list */
.game-list { display: flex; flex-direction: column; gap: .5rem; }
.game-row {
    background: var(--o2-surface); border: 1px solid var(--o2-border); border-radius: 10px;
    padding: .75rem 1rem; display: grid;
    grid-template-columns: 1fr auto; grid-template-areas: "main actions" "meta actions"; gap: .25rem 1rem;
    align-items: center;
}
.game-row-main { grid-area: main; display: flex; align-items: center; gap: .5rem; }
.game-row-title { font-weight: 600; }
.game-row-outcome { color: var(--o2-muted); }
.game-row-meta { grid-area: meta; color: var(--o2-muted); font-size: .85rem; }
.game-row-actions { grid-area: actions; display: flex; gap: .4rem; align-items: center; }
.game-row-actions .confirm { display: inline-flex; gap: .3rem; align-items: center; font-size: .85rem; }
.empty-state { text-align: center; padding: 2rem; color: var(--o2-muted); }

/* Checkers board */
.cb-wrap { max-width: 520px; margin: 0 auto; }
.cb-status { min-height: 1.6rem; margin-bottom: .5rem; font-size: 1.05rem; }
.cb-status-final { font-size: 1.25rem; }
.cb-thinking { color: var(--o2-primary); font-style: italic; }

.cb-board {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    width: min(92vw, 480px);
    aspect-ratio: 1 / 1;
    border: 4px solid var(--o2-board-dark);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 1rem;
    touch-action: manipulation;
}
.cb-square { position: relative; display: flex; align-items: center; justify-content: center; }
.cb-light { background: var(--o2-board-light); }
.cb-dark { background: var(--o2-board-dark); cursor: pointer; }
.cb-origin::after, .cb-target::after {
    content: ""; position: absolute; width: 28%; height: 28%; border-radius: 50%;
}
.cb-target::after { background: rgba(245,166,35,.85); }
.cb-origin::after { background: rgba(245,166,35,.35); }
.cb-sel { box-shadow: inset 0 0 0 4px var(--o2-accent); }

.cb-piece {
    width: 72%; height: 72%; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.4rem; line-height: 1;
    box-shadow: 0 2px 3px rgba(0,0,0,.35);
}
.cb-human { background: radial-gradient(circle at 35% 30%, #e85d4e, #b3231a); color: #ffd; }
.cb-computer { background: radial-gradient(circle at 35% 30%, #4a4a55, #1d1b2e); color: #ffd; }
.cb-king { box-shadow: 0 0 0 3px var(--o2-accent), 0 2px 3px rgba(0,0,0,.35); }

.cb-controls { display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; justify-content: space-between; }
.cb-diff select { margin-left: .35rem; }
.cb-counts { color: var(--o2-muted); }
.cb-buttons { display: flex; gap: .5rem; }

/* New-game variant/difficulty picker */
.ng-options { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: .35rem; }
.ng-chip {
    border: 1px solid var(--o2-border); background: var(--o2-surface); color: var(--o2-ink);
    border-radius: 999px; padding: .4rem .9rem; cursor: pointer; font-weight: 600;
}
.ng-chip:hover { border-color: var(--o2-primary); }
.ng-sel { background: var(--o2-primary); color: #fff; border-color: var(--o2-primary); }

/* Preference board */
.pf-wrap { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: .9rem; }
.pf-sheet { border: 1px solid var(--o2-border); border-radius: 10px; overflow: hidden; }
.pf-sheet-row { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; padding: .35rem .75rem; }
.pf-sheet-row:not(:last-child) { border-bottom: 1px solid var(--o2-border); }
.pf-sheet-head { background: var(--o2-bg); font-weight: 700; color: var(--o2-muted); }
.pf-me { background: rgba(59,47,143,.06); font-weight: 600; }
.pf-status { font-size: 1.05rem; }
.pf-opponents { display: flex; gap: 1rem; flex-wrap: wrap; }
.pf-opp { flex: 1; min-width: 200px; border: 1px solid var(--o2-border); border-radius: 10px; padding: .6rem .8rem; }
.pf-opp-name { font-weight: 700; }
.pf-opp-meta { color: var(--o2-muted); font-size: .85rem; }
.pf-backs { display: flex; flex-wrap: nowrap; margin: .35rem 0; }
.pf-thinking { color: var(--o2-primary); font-style: italic; }

.pf-table { min-height: 90px; display: flex; flex-direction: column; gap: .5rem; }
.pf-talon, .pf-trick { display: flex; align-items: center; gap: .4rem; flex-wrap: wrap; }
.pf-label { color: var(--o2-muted); font-size: .8rem; min-width: 48px; }
.pf-played { display: inline-flex; flex-direction: column; align-items: center; }
.pf-played-by { font-size: .7rem; color: var(--o2-muted); }

.pc { width: 100%; height: 100%; display: block; object-fit: contain; }
.pf-cardbox { display: inline-block; line-height: 0; padding: 0; border: 0; background: transparent; border-radius: 8px; }
.pf-sm { width: 46px; height: 64px; }
.pf-back { width: 34px; height: 48px; margin-left: -16px; }
.pf-back:first-child { margin-left: 0; }

.pf-hand { border-top: 1px solid var(--o2-border); padding-top: .6rem; }
.pf-hand-cards { display: flex; flex-wrap: wrap; gap: .3rem; margin-top: .35rem; }
.pf-hand-card { width: 62px; height: 86px; cursor: default; transition: transform .1s ease, box-shadow .1s ease; }
.pf-hand-card:disabled { opacity: .9; }
.pf-playable { cursor: pointer; box-shadow: 0 0 0 2px var(--o2-accent); }
.pf-playable:hover { transform: translateY(-6px); }
.pf-selected { box-shadow: 0 0 0 3px var(--o2-accent); transform: translateY(-8px); }

.pf-controls { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; min-height: 2rem; }
.pf-controls select { max-width: 160px; }
.pf-log { border-top: 1px solid var(--o2-border); padding-top: .5rem; color: var(--o2-muted); font-size: .85rem; }