:root {
    --page-bg: linear-gradient(180deg, #f7fbff 0%, #edf4fc 100%);
    --panel-bg: rgba(255, 255, 255, 0.95);
    --panel-border: rgba(29, 96, 182, 0.12);
    --text-main: #163252;
    --text-muted: #607790;
    --accent: #1f73d8;
    --accent-dark: #1558aa;
    --table-bg: linear-gradient(180deg, #ffffff 0%, #f4f8fd 100%);
    --shadow: 0 18px 45px rgba(20, 66, 120, 0.14);
    --radius-xl: 28px;
    --radius-lg: 20px;
    --radius-md: 16px;
    --card-width: 82px;
    --card-height: 118px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Segoe UI", "Trebuchet MS", sans-serif;
    color: var(--text-main);
    background:
        radial-gradient(circle at top, rgba(57, 133, 221, 0.13), transparent 28%),
        linear-gradient(180deg, #ffffff 0%, #eff6fd 100%);
    overflow-x: hidden;
}

button,
input,
select {
    font: inherit;
}

h1,
h2,
p,
dd,
dl,
dt {
    margin: 0;
}

.app-shell {
    max-width: 1360px;
    margin: 0 auto;
    padding: 24px;
}

.panel {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    backdrop-filter: blur(14px);
}

.top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 22px 24px;
}

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

.difficulty-picker {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 800;
    color: var(--text-muted);
}

.difficulty-picker span {
    font-size: 0.86rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.difficulty-picker select {
    border: 1px solid rgba(29, 96, 182, 0.16);
    border-radius: 999px;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.96);
    color: var(--text-main);
    font-weight: 800;
}

.eyebrow {
    margin-bottom: 4px;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

h1 {
    font-size: clamp(2rem, 4vw, 2.9rem);
    line-height: 1;
}

h2 {
    font-size: 1rem;
    margin-bottom: 14px;
}

.eqsy-button {
    border: 0;
    border-radius: 999px;
    background: linear-gradient(180deg, #2b8cff 0%, var(--accent) 100%);
    color: white;
    font-weight: 800;
    padding: 12px 20px;
    cursor: pointer;
    box-shadow: 0 12px 24px rgba(31, 115, 216, 0.3);
    transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.eqsy-button:hover,
.eqsy-button:focus-visible {
    transform: translateY(-1px);
    box-shadow: 0 16px 26px rgba(31, 115, 216, 0.35);
    background: linear-gradient(180deg, #3290ff 0%, var(--accent-dark) 100%);
}

.quick-state {
    margin: 12px 0;
    padding: 12px 16px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px 16px;
    align-items: center;
}

.quick-state-item {
    color: var(--text-muted);
    font-weight: 700;
    font-size: 0.88rem;
}

.quick-state-item strong {
    color: var(--text-main);
    font-size: 0.92rem;
}

.leaderboard-panel {
    padding: 18px 22px;
    margin-bottom: 18px;
}

.multiplayer-panel {
    padding: 16px 22px;
    margin-bottom: 12px;
}

.multiplayer-entry {
    margin-bottom: 12px;
}

.multiplayer-open-button,
.multiplayer-close-button {
    width: auto;
    min-width: 172px;
    padding: 10px 14px;
    font-size: 0.84rem;
}

.multiplayer-close-button {
    margin-top: 10px;
}

.multiplayer-summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    color: var(--text-muted);
    font-weight: 800;
    list-style: none;
}

.multiplayer-summary::-webkit-details-marker {
    display: none;
}

.multiplayer-summary strong {
    color: var(--text-main);
    font-size: 0.85rem;
}

.multiplayer-panel[open] .multiplayer-summary {
    margin-bottom: 12px;
}

.multiplayer-controls {
    display: grid;
    grid-template-columns: repeat(2, minmax(180px, 1fr)) 1fr;
    gap: 10px;
    align-items: end;
}

.multiplayer-field {
    display: grid;
    gap: 4px;
}

.multiplayer-field span {
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.68rem;
    font-weight: 800;
}

.multiplayer-field input {
    border: 1px solid rgba(29, 96, 182, 0.2);
    border-radius: 999px;
    padding: 8px 11px;
    background: rgba(255, 255, 255, 0.94);
    color: var(--text-main);
    font-weight: 700;
}

.multiplayer-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.multiplayer-buttons .eqsy-button {
    width: auto;
    min-width: 108px;
    padding: 9px 12px;
    font-size: 0.8rem;
}

.multiplayer-status {
    margin: 10px 0 6px;
    color: var(--text-muted);
    font-weight: 700;
    font-size: 0.88rem;
}

.multiplayer-room-state {
    display: grid;
    gap: 4px;
    font-size: 0.84rem;
    color: var(--text-main);
}

.multiplayer-name-warning {
    color: #9f5a00;
    font-weight: 700;
}

.multiplayer-alert {
    color: #b42318;
    font-weight: 800;
}

.multiplayer-invite-note {
    color: var(--text-muted);
    font-size: 0.78rem;
    font-weight: 700;
}

.multiplayer-invite-join {
    width: auto;
    min-width: 170px;
    justify-self: start;
    margin-top: 2px;
}

.multiplayer-invite-link,
.multiplayer-invite-template {
    color: var(--accent-dark);
    font-weight: 700;
    word-break: break-all;
}

.multiplayer-copy-link {
    width: auto;
    min-width: 92px;
    margin-left: 8px;
    padding: 6px 10px;
    font-size: 0.74rem;
}

.multiplayer-invite-link:hover {
    text-decoration: underline;
}

.leaderboard-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
}

.leaderboard-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.player-name-picker {
    display: grid;
    gap: 3px;
}

.leaderboard-filter-picker {
    display: grid;
    gap: 3px;
}

.player-name-picker span {
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.68rem;
    font-weight: 800;
}

.leaderboard-filter-picker span {
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.68rem;
    font-weight: 800;
}

.player-name-picker input {
    width: 148px;
    border: 1px solid rgba(29, 96, 182, 0.2);
    border-radius: 999px;
    padding: 8px 11px;
    background: rgba(255, 255, 255, 0.94);
    color: var(--text-main);
    font-weight: 700;
}

.leaderboard-filter-picker select {
    width: 122px;
    border: 1px solid rgba(29, 96, 182, 0.2);
    border-radius: 999px;
    padding: 8px 11px;
    background: rgba(255, 255, 255, 0.94);
    color: var(--text-main);
    font-weight: 700;
}

.leaderboard-header h2 {
    margin: 4px 0 0;
}

.leaderboard-refresh {
    min-width: 112px;
}

.leaderboard-status {
    margin: 10px 0;
    color: var(--text-muted);
    font-size: 0.9rem;
}

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

.leaderboard-toggle {
    margin-top: 10px;
    padding: 9px 14px;
    font-size: 0.82rem;
    width: auto;
    min-width: 110px;
}

.leaderboard-table {
    width: 100%;
    min-width: 620px;
    border-collapse: collapse;
}

.leaderboard-table th,
.leaderboard-table td {
    padding: 8px 7px;
    border-bottom: 1px solid rgba(29, 96, 182, 0.12);
    text-align: left;
    font-size: 0.88rem;
}

.leaderboard-table th {
    color: var(--text-muted);
    font-size: 0.72rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

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

.leaderboard-empty {
    color: var(--text-muted);
}

.status-panel,
.message-panel {
    padding: 20px 22px;
}

.message-panel.compact {
    margin: 0 0 10px;
    padding: 12px 16px;
}

.state-details {
    margin: 0 0 14px;
    padding: 10px 14px 14px;
}

.state-details summary {
    cursor: pointer;
    color: var(--text-muted);
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.75rem;
    margin-bottom: 10px;
}

.state-list {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 10px 12px;
}

.state-list dt {
    color: var(--text-muted);
    font-weight: 700;
}

.state-list dd {
    font-weight: 800;
}

.message-panel p {
    color: var(--text-muted);
    font-size: 1rem;
}

.result-overlay {
    position: fixed;
    inset: 0;
    z-index: 30;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: rgba(17, 38, 66, 0.4);
    backdrop-filter: blur(8px);
}

.result-overlay[hidden] {
    display: none;
}

.result-card {
    width: min(100%, 520px);
    padding: 22px;
}

.result-card h2 {
    margin-bottom: 8px;
}

.result-outcome {
    margin: 0 0 8px;
    font-weight: 800;
    font-size: 0.92rem;
    color: var(--accent-dark);
}

.result-outcome.is-win {
    color: #0f8a46;
}

.result-outcome.is-loss {
    color: #c13f54;
}

.result-summary {
    color: var(--text-muted);
    margin-bottom: 18px;
}

.result-scores {
    display: grid;
    gap: 10px;
    margin-bottom: 18px;
}

.result-stats {
    margin-bottom: 16px;
    overflow-x: auto;
}

.result-save-wrap {
    margin-bottom: 14px;
    display: grid;
    gap: 8px;
}

.result-save-wrap.is-force-hidden,
.result-save-wrap[hidden] {
    display: none !important;
    visibility: hidden !important;
    max-height: 0 !important;
    overflow: hidden !important;
    pointer-events: none !important;
}

.result-name-field {
    display: grid;
    gap: 4px;
}

.result-name-field span {
    color: var(--text-muted);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 800;
}

.result-name-field input {
    border: 1px solid rgba(29, 96, 182, 0.18);
    border-radius: 12px;
    padding: 10px 12px;
    background: #fff;
    color: var(--text-main);
    font-weight: 700;
}

.result-save-button {
    width: fit-content;
    min-width: 130px;
    padding: 10px 14px;
}

.result-save-status {
    min-height: 1.1rem;
    color: var(--text-muted);
    font-size: 0.84rem;
    font-weight: 700;
}

.result-stats-table {
    width: 100%;
    min-width: 520px;
    border-collapse: collapse;
}

.result-stats-table th,
.result-stats-table td {
    text-align: left;
    padding: 7px 6px;
    border-bottom: 1px solid rgba(29, 96, 182, 0.12);
    font-size: 0.83rem;
}

.result-stats-table th {
    font-size: 0.7rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--text-muted);
}

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

.result-score-row {
    display: grid;
    grid-template-columns: minmax(80px, 1fr) repeat(2, auto);
    gap: 10px;
    align-items: center;
    padding: 12px 14px;
    border-radius: 14px;
    background: rgba(31, 115, 216, 0.06);
}

.result-score-row strong {
    font-size: 1rem;
}

.result-score-meta {
    color: var(--text-muted);
    font-weight: 700;
    text-align: right;
}

.table {
    padding: 22px;
    background: var(--table-bg);
}

.player-slot {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.player-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    font-weight: 800;
}

.player-header.vertical {
    justify-content: flex-start;
    align-items: flex-start;
    min-width: 60px;
}

.player-count {
    color: var(--text-muted);
    font-size: 0.92rem;
}

.card-row {
    min-height: calc(var(--card-height) + 12px);
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.card-column {
    min-height: auto;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    gap: 0;
}

.card-column.stacked-ai {
    position: relative;
    width: var(--card-width);
    height: calc(var(--card-height) + (var(--stack-count, 1) - 1) * 18px);
}

.card-column.stacked-ai .stacked-back {
    position: absolute;
    left: 0;
    top: calc(var(--stack-index, 0) * 18px);
}

.table-middle {
    display: grid;
    grid-template-columns: minmax(120px, 180px) 1fr minmax(120px, 180px);
    align-items: center;
    gap: 16px;
    margin: 24px 0;
}

.trick-area-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 280px;
}

.trick-area {
    width: min(100%, 430px);
    aspect-ratio: 1 / 1;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
    padding: 22px;
    border-radius: 28px;
    border: 2px dashed rgba(31, 115, 216, 0.25);
    background: rgba(255, 255, 255, 0.52);
}

.trick-card-slot {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.trick-player-label {
    color: var(--text-muted);
    font-weight: 800;
}

.card-button {
    padding: 0;
    background: transparent;
    border: 0;
    cursor: pointer;
    transition: transform 160ms ease, filter 160ms ease;
}

.card-button:hover,
.card-button:focus-visible {
    transform: translateY(-6px);
    filter: brightness(1.02);
}

.card-button:disabled {
    cursor: not-allowed;
    opacity: 0.58;
}

.card-button:disabled:hover,
.card-button:disabled:focus-visible {
    transform: none;
    filter: none;
}

.card-face,
.card-back {
    width: var(--card-width);
    height: var(--card-height);
    border-radius: 14px;
    border: 1px solid rgba(20, 66, 120, 0.12);
    box-shadow: 0 8px 20px rgba(17, 48, 87, 0.18);
    background: white;
}

.card-face {
    position: relative;
    overflow: hidden;
}

.hand-card-index {
    display: none;
    position: absolute;
    left: 6px;
    top: 6px;
    z-index: 3;
    font-weight: 800;
    line-height: 1;
    text-align: center;
}

.hand-card-index > span {
    display: block;
}

.card-image {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-image.is-hidden {
    display: none;
}

.card-fallback {
    position: absolute;
    inset: 0;
    display: none;
    grid-template-rows: auto 1fr auto;
    padding: 10px;
    background: #fff;
}

.card-fallback.is-visible {
    display: grid;
}

.card-corner {
    display: grid;
    gap: 2px;
    font-weight: 800;
    font-size: 0.95rem;
    line-height: 1;
}

.card-suit-large {
    display: grid;
    place-items: center;
    font-size: 2.25rem;
    font-weight: 700;
}

.card-footer {
    justify-self: end;
    transform: rotate(180deg);
}

.suit-hearts,
.suit-diamonds {
    color: #d8485d;
}

.suit-clubs,
.suit-spades {
    color: #1c2a3f;
}

.card-back {
    position: relative;
    overflow: hidden;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.16), transparent),
        linear-gradient(180deg, #1f73d8 0%, #1558aa 100%);
}

.card-back-image {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: inherit;
}

.card-back::before,
.card-back::after {
    content: "";
    position: absolute;
    inset: 10px;
    border-radius: 10px;
    border: 2px solid rgba(255, 255, 255, 0.35);
}

.card-back::after {
    inset: 22px;
    border-style: dashed;
}

.empty-trick {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-weight: 700;
    text-align: center;
    padding: 12px;
}

.empty-trick-opening {
    color: #b31515;
    font-size: 1rem;
    font-weight: 800;
}

.turn-indicator {
    outline: 3px solid rgba(31, 115, 216, 0.2);
    outline-offset: 10px;
    border-radius: 20px;
}

@media (max-width: 960px) {
    .table-middle {
        grid-template-columns: 1fr;
    }

    .player-west,
    .player-east {
        align-items: center;
    }

    .player-header.vertical {
        align-items: center;
    }

    .card-column {
        min-height: auto;
        flex-direction: row;
        flex-wrap: wrap;
    }

    .trick-area-wrap {
        min-height: 280px;
        order: -1;
    }
}

@media (max-width: 720px) {
    :root {
        --card-width: 64px;
        --card-height: 92px;
    }

    .app-shell {
        padding: 16px;
    }

    .top-bar {
        padding: 18px;
        flex-direction: column;
        align-items: stretch;
    }

    .top-bar-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .leaderboard-panel {
        padding: 14px;
    }

    .multiplayer-panel {
        padding: 14px;
    }

    .multiplayer-open-button,
    .multiplayer-close-button {
        width: 100%;
    }

    .multiplayer-controls {
        grid-template-columns: 1fr;
    }

    .multiplayer-buttons {
        width: 100%;
    }

    .multiplayer-buttons .eqsy-button {
        flex: 1 1 calc(50% - 8px);
    }

    .multiplayer-copy-link {
        margin-top: 6px;
        margin-left: 0;
    }

    .leaderboard-header {
        align-items: center;
    }

    .leaderboard-actions {
        width: 100%;
        flex-wrap: wrap;
    }

    .player-name-picker {
        flex: 1 1 170px;
    }

    .leaderboard-filter-picker {
        flex: 1 1 130px;
    }

    .player-name-picker input {
        width: 100%;
    }

    .leaderboard-filter-picker select {
        width: 100%;
    }

    .difficulty-picker {
        justify-content: space-between;
    }

    .table,
    .status-panel,
    .message-panel {
        padding: 16px;
    }

    .trick-area {
        gap: 12px;
        padding: 16px;
    }
}

@media (max-width: 640px) {
    :root {
        --card-width: 58px;
        --card-height: 84px;
    }

    .app-shell {
        padding: 10px;
    }

    .top-bar {
        border-radius: 18px;
        padding: 14px;
        gap: 10px;
    }

    .eyebrow {
        font-size: 0.68rem;
    }

    h1 {
        font-size: 1.8rem;
    }

    .eqsy-button {
        width: 100%;
        padding: 10px 14px;
    }

    .result-overlay {
        padding: 14px;
    }

    .result-card {
        padding: 16px;
    }

    .result-score-row {
        grid-template-columns: 1fr;
        gap: 4px;
    }

    .result-score-meta {
        text-align: left;
    }

    .result-stats-table {
        min-width: 460px;
    }

    .result-stats-table th,
    .result-stats-table td {
        padding: 6px 5px;
        font-size: 0.78rem;
    }

    .quick-state {
        margin: 8px 0;
        padding: 10px 12px;
        gap: 6px 12px;
    }

    .quick-state-item {
        font-size: 0.8rem;
    }

    .leaderboard-status {
        font-size: 0.85rem;
        margin: 8px 0;
    }

    .state-details {
        margin-bottom: 10px;
        padding: 8px 10px 10px;
    }

    .message-panel {
        border-radius: 14px;
        padding: 12px 14px;
    }

    .table {
        border-radius: 18px;
        padding: 10px;
    }

    .table-middle {
        grid-template-columns: 1fr;
        gap: 10px;
        margin: 10px 0;
    }

    .player-north,
    .player-west,
    .player-east {
        background: rgba(31, 115, 216, 0.06);
        border: 1px solid rgba(31, 115, 216, 0.14);
        border-radius: 14px;
        padding: 8px 10px;
        min-height: 0;
    }

    .player-north .ai-hand,
    .player-west .ai-hand,
    .player-east .ai-hand {
        display: none;
    }

    .player-header,
    .player-header.vertical {
        min-width: 0;
        align-items: center;
        justify-content: space-between;
    }

    .player-west,
    .player-east {
        width: 100%;
    }

    .trick-area-wrap {
        min-height: 0;
        order: -1;
    }

    .trick-area {
        width: min(100%, 280px);
        min-height: 160px;
        gap: 8px;
        padding: 10px;
        border-radius: 18px;
    }

    .trick-player-label {
        font-size: 0.8rem;
    }

    .player-south {
        margin-top: 4px;
    }

    .human-hand {
        position: relative;
        display: block;
        overflow: hidden;
        min-height: calc(var(--card-height) + 10px);
        padding: 6px 0 8px;
    }

    .human-hand .card-button {
        position: absolute;
        left: var(--hand-left, 0px);
        top: 0;
        margin-right: 0;
        transform-origin: bottom center;
        z-index: 1;
    }

    .human-hand .card-button:hover,
    .human-hand .card-button:focus-visible {
        transform: translateY(-10px);
        z-index: 8;
    }

    .human-hand .card-fallback {
        display: grid;
        grid-template-rows: auto;
        align-content: start;
        padding: 6px;
    }

    .human-hand .card-image {
        display: none;
    }

    .human-hand .card-fallback .card-suit-large,
    .human-hand .card-fallback .card-footer {
        display: none;
    }

    .human-hand .hand-card-index {
        display: block !important;
        left: 3px;
        top: 2px;
        z-index: 7;
        min-width: 14px;
        padding: 0;
        border-radius: 0;
        background: transparent;
        font-size: 0.8rem;
        font-weight: 800;
        line-height: 0.88;
        letter-spacing: -0.01em;
        text-shadow: 0 1px 0 rgba(255, 255, 255, 0.55);
        box-shadow: none;
    }

    .human-hand .hand-card-index > span:first-child {
        margin-bottom: 1px;
    }

    .human-hand .card-fallback .card-corner {
        display: none;
    }

    .turn-indicator {
        outline-width: 2px;
        outline-offset: 3px;
    }
}