/* =========================================================
   CHESS APP — COMPLETE STYLES
   Исправленная версия:
   - шахматная доска не съезжает
   - адаптивность PC / планшет / телефон
   - Party Mode
   - чат
   - часы
   - кнопки сдачи / ничьей / реванша
   ========================================================= */

:root {
    --bg: #0e0f13;
    --bg-2: #15171d;

    --panel: rgba(25, 27, 34, 0.94);
    --panel-2: rgba(31, 34, 42, 0.96);

    --border: rgba(255, 255, 255, 0.09);
    --border-hover: rgba(255, 255, 255, 0.18);

    --text: #f1f1f1;
    --text-soft: #a7abb5;
    --text-muted: #727782;

    --accent: #d9a441;
    --accent-hover: #edbb58;

    --danger: #d95c5c;
    --success: #65b97c;
    --warning: #d7a84b;

    --board-light: #e6d3ad;
    --board-dark: #9b754c;

    --board-size: min(78vh, 720px);

    --radius: 12px;

    --shadow:
        0 18px 50px rgba(0, 0, 0, 0.35);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    width: 100%;
    min-height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family:
        Inter,
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
}

body {
    width: 100%;
    min-height: 100vh;
    min-height: 100dvh;

    background:
        radial-gradient(
            circle at top left,
            rgba(217, 164, 65, 0.055),
            transparent 32%
        ),
        linear-gradient(
            145deg,
            #0b0c10,
            #111319 55%,
            #0b0c10
        );

    color: var(--text);

    overflow-x: hidden;
}

button,
input,
textarea {
    font: inherit;
}

button {
    border: 0;
    outline: 0;
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.hidden {
    display: none !important;
}

/* =========================================================
   APP
   ========================================================= */

#app {
    width: 100%;
    min-height: 100vh;
    min-height: 100dvh;

    display: flex;
    flex-direction: column;
}

/* =========================================================
   HEADER
   ========================================================= */

.topbar,
header {
    width: 100%;
    min-height: 64px;

    display: flex;
    align-items: center;
    justify-content: space-between;

    padding: 10px 18px;

    background: rgba(16, 17, 22, 0.92);
    border-bottom: 1px solid var(--border);

    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);

    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;

    color: var(--text);
    font-size: 19px;
    font-weight: 700;
    letter-spacing: 0.4px;
}

.logo span {
    color: var(--accent);
}

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

/* =========================================================
   BUTTONS
   ========================================================= */

.btn {
    min-height: 40px;

    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;

    padding: 8px 14px;

    border: 1px solid var(--border);
    border-radius: 8px;

    background: rgba(255, 255, 255, 0.045);
    color: var(--text);

    cursor: pointer;

    transition:
        background 0.18s ease,
        border-color 0.18s ease,
        transform 0.15s ease,
        color 0.18s ease;
}

.btn:hover {
    background: rgba(255, 255, 255, 0.085);
    border-color: var(--border-hover);
}

.btn:active {
    transform: translateY(1px);
}

.btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #17120a;
    font-weight: 700;
}

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

.btn-danger {
    color: #fff;
    background: rgba(217, 92, 92, 0.13);
    border-color: rgba(217, 92, 92, 0.3);
}

.btn-danger:hover {
    background: rgba(217, 92, 92, 0.22);
}

.btn-success {
    color: #fff;
    background: rgba(101, 185, 124, 0.13);
    border-color: rgba(101, 185, 124, 0.3);
}

.btn-success:hover {
    background: rgba(101, 185, 124, 0.22);
}

.btn-warning {
    color: #fff;
    background: rgba(215, 168, 75, 0.13);
    border-color: rgba(215, 168, 75, 0.3);
}

/* =========================================================
   MAIN LAYOUT
   ========================================================= */

.main,
main {
    width: 100%;
    flex: 1;

    display: grid;
    grid-template-columns:
        minmax(0, 1fr)
        minmax(260px, 350px);

    gap: 18px;

    padding: 18px;

    align-items: start;
}

/* =========================================================
   GAME AREA
   ========================================================= */

.game-area {
    min-width: 0;
    width: 100%;

    display: flex;
    flex-direction: column;
    align-items: center;
}

/* =========================================================
   PLAYER
   ========================================================= */

.player {
    width: min(var(--board-size), 100%);

    display: flex;
    align-items: center;
    justify-content: space-between;

    min-height: 48px;

    margin: 0 auto 8px;
    padding: 7px 10px;

    background: rgba(255, 255, 255, 0.035);

    border: 1px solid var(--border);
    border-radius: 9px;
}

.player-info {
    min-width: 0;

    display: flex;
    align-items: center;
    gap: 9px;
}

.player-avatar {
    width: 32px;
    height: 32px;

    flex: 0 0 32px;

    display: flex;
    align-items: center;
    justify-content: center;

    border-radius: 50%;

    background: rgba(255, 255, 255, 0.08);
}

.player-name {
    min-width: 0;

    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;

    font-weight: 600;
}

.player-status {
    color: var(--text-muted);
    font-size: 12px;
}

/* =========================================================
   CHESS CLOCK
   ========================================================= */

.clock {
    min-width: 82px;

    padding: 7px 10px;

    border-radius: 7px;

    background: #0a0b0e;
    border: 1px solid rgba(255, 255, 255, 0.07);

    color: #fff;

    text-align: center;

    font-family:
        "SFMono-Regular",
        Consolas,
        "Liberation Mono",
        monospace;

    font-size: 19px;
    font-weight: 700;

    letter-spacing: 1px;
}

.clock.active {
    background: rgba(217, 164, 65, 0.14);
    border-color: rgba(217, 164, 65, 0.45);
    color: var(--accent);
}

.clock.low {
    color: var(--danger);
    border-color: rgba(217, 92, 92, 0.4);
}

/* =========================================================
   BOARD WRAPPER
   ========================================================= */

.board-wrapper {
    width: min(var(--board-size), calc(100vw - 36px));

    aspect-ratio: 1 / 1;

    position: relative;

    flex: 0 0 auto;

    margin: 0 auto;

    border-radius: 4px;

    box-shadow:
        0 15px 40px rgba(0, 0, 0, 0.38),
        0 0 0 1px rgba(255, 255, 255, 0.07);

    overflow: hidden;
}

/*
   ВАЖНО:
   Доска всегда квадратная.
   Не использовать width: 100% без aspect-ratio.
*/

#board,
.chessboard,
.board {
    width: 100% !important;
    height: 100% !important;

    aspect-ratio: 1 / 1;

    display: grid !important;

    grid-template-columns:
        repeat(8, minmax(0, 1fr)) !important;

    grid-template-rows:
        repeat(8, minmax(0, 1fr)) !important;

    position: relative;

    overflow: hidden;
}

/* =========================================================
   CHESS SQUARE
   ========================================================= */

.square,
.cell,
.board-square {
    width: 100%;
    height: 100%;

    min-width: 0;
    min-height: 0;

    position: relative;

    display: flex;
    align-items: center;
    justify-content: center;

    user-select: none;
    -webkit-user-select: none;

    touch-action: manipulation;

    cursor: pointer;
}

.square.light,
.cell.light,
.board-square.light {
    background: var(--board-light);
}

.square.dark,
.cell.dark,
.board-square.dark {
    background: var(--board-dark);
}

.square:hover {
    filter: brightness(1.05);
}

/* =========================================================
   CHESS PIECES
   ========================================================= */

.piece {
    width: 90%;
    height: 90%;

    display: flex;
    align-items: center;
    justify-content: center;

    position: relative;
    z-index: 4;

    font-family:
        "Noto Sans Symbols 2",
        "Segoe UI Symbol",
        "DejaVu Sans",
        sans-serif;

    font-size: clamp(
        28px,
        calc(var(--board-size) / 10),
        72px
    );

    line-height: 1;

    cursor: pointer;

    user-select: none;
    -webkit-user-select: none;

    transition:
        transform 0.1s ease;
}

.square:active .piece {
    transform: scale(0.95);
}

/* белые фигуры */

.piece.white,
.piece[data-color="w"] {
    color: #fff;

    text-shadow:
        0 1px 0 #777,
        0 2px 2px rgba(0, 0, 0, 0.5);
}

/* чёрные фигуры */

.piece.black,
.piece[data-color="b"] {
    color: #171717;

    text-shadow:
        0 1px 0 rgba(255,255,255,0.15),
        0 2px 2px rgba(0, 0, 0, 0.35);
}

/* =========================================================
   SELECTED SQUARE
   ========================================================= */

.square.selected {
    box-shadow:
        inset 0 0 0 4px rgba(217, 164, 65, 0.85);
}

.square.last-move {
    box-shadow:
        inset 0 0 0 999px rgba(217, 164, 65, 0.16);
}

.square.legal::after {
    content: "";

    width: 23%;
    height: 23%;

    position: absolute;

    top: 50%;
    left: 50%;

    transform: translate(-50%, -50%);

    border-radius: 50%;

    background: rgba(25, 25, 25, 0.28);

    pointer-events: none;
}

.square.capture::after {
    content: "";

    position: absolute;

    inset: 8%;

    border-radius: 50%;

    border: 4px solid rgba(217, 164, 65, 0.75);

    pointer-events: none;
}

/* =========================================================
   CHECK
   ========================================================= */

.square.check {
    background:
        radial-gradient(
            circle,
            rgba(217, 70, 70, 0.9),
            rgba(180, 40, 40, 0.5) 50%,
            transparent 75%
        );
}

/* =========================================================
   BOARD COORDINATES
   ========================================================= */

.coordinate {
    position: absolute;

    z-index: 8;

    font-size: clamp(8px, 1.2vw, 13px);

    font-weight: 700;

    pointer-events: none;

    opacity: 0.7;
}

.coordinate.rank {
    top: 3px;
    left: 4px;
}

.coordinate.file {
    right: 4px;
    bottom: 2px;
}

/* =========================================================
   GAME CONTROLS
   ========================================================= */

.game-controls {
    width: min(var(--board-size), 100%);

    display: grid;

    grid-template-columns:
        repeat(4, minmax(0, 1fr));

    gap: 8px;

    margin-top: 12px;
}

.game-controls .btn {
    width: 100%;
}

/* =========================================================
   SIDEBAR
   ========================================================= */

.sidebar {
    width: 100%;
    min-width: 0;

    display: flex;
    flex-direction: column;

    gap: 12px;
}

.panel {
    width: 100%;

    background: var(--panel);

    border: 1px solid var(--border);

    border-radius: var(--radius);

    box-shadow: var(--shadow);

    overflow: hidden;
}

.panel-header {
    min-height: 48px;

    display: flex;
    align-items: center;
    justify-content: space-between;

    padding: 10px 13px;

    border-bottom: 1px solid var(--border);

    font-weight: 700;
}

.panel-title {
    font-size: 14px;
}

.panel-content {
    padding: 12px;
}

/* =========================================================
   GAME INFO
   ========================================================= */

.game-info {
    display: grid;
    grid-template-columns: 1fr 1fr;

    gap: 8px;
}

.info-item {
    padding: 10px;

    background: rgba(255, 255, 255, 0.035);

    border: 1px solid var(--border);

    border-radius: 8px;
}

.info-label {
    color: var(--text-muted);
    font-size: 11px;
}

.info-value {
    margin-top: 3px;

    font-weight: 700;
}

/* =========================================================
   PARTY MODE
   ========================================================= */

.party {
    width: 100%;
}

.party-users {
    display: flex;
    flex-direction: column;
    gap: 7px;

    max-height: 250px;
    overflow-y: auto;
}

.party-user {
    min-height: 40px;

    display: flex;
    align-items: center;
    gap: 9px;

    padding: 7px 9px;

    background: rgba(255, 255, 255, 0.035);

    border: 1px solid var(--border);

    border-radius: 8px;
}

.party-user-avatar {
    width: 28px;
    height: 28px;

    flex: 0 0 28px;

    display: flex;
    align-items: center;
    justify-content: center;

    border-radius: 50%;

    background: rgba(255, 255, 255, 0.08);
}

.party-user-name {
    min-width: 0;

    flex: 1;

    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.party-user-status {
    width: 8px;
    height: 8px;

    border-radius: 50%;

    background: var(--success);
}

/* =========================================================
   SPECTATORS
   ========================================================= */

.spectators {
    color: var(--text-soft);
    font-size: 13px;
}

.spectators strong {
    color: var(--text);
}

/* =========================================================
   CHAT
   ========================================================= */

.chat {
    display: flex;
    flex-direction: column;

    height: 380px;
    min-height: 280px;
}

.chat-messages {
    flex: 1;

    min-height: 0;

    overflow-y: auto;

    display: flex;
    flex-direction: column;

    gap: 7px;

    padding: 10px;
}

.chat-message {
    max-width: 88%;

    padding: 7px 9px;

    background: rgba(255, 255, 255, 0.05);

    border: 1px solid var(--border);

    border-radius: 8px;

    font-size: 13px;

    overflow-wrap: anywhere;
}

.chat-message.own {
    align-self: flex-end;

    background: rgba(217, 164, 65, 0.12);

    border-color: rgba(217, 164, 65, 0.25);
}

.chat-author {
    margin-bottom: 2px;

    color: var(--accent);

    font-size: 11px;
    font-weight: 700;
}

.chat-input-area {
    display: flex;
    gap: 7px;

    padding: 9px;

    border-top: 1px solid var(--border);
}

.chat-input {
    min-width: 0;
    flex: 1;

    height: 40px;

    padding: 0 10px;

    border: 1px solid var(--border);

    border-radius: 8px;

    background: rgba(0, 0, 0, 0.2);

    color: var(--text);

    outline: none;
}

.chat-input::placeholder {
    color: var(--text-muted);
}

.chat-input:focus {
    border-color: rgba(217, 164, 65, 0.5);
}

.chat-send {
    width: 40px;
    height: 40px;

    flex: 0 0 40px;

    display: flex;
    align-items: center;
    justify-content: center;

    border-radius: 8px;

    background: var(--accent);
    color: #17120a;

    cursor: pointer;
}

/* =========================================================
   MODAL
   ========================================================= */

.modal {
    position: fixed;

    inset: 0;

    z-index: 1000;

    display: flex;
    align-items: center;
    justify-content: center;

    padding: 18px;

    background: rgba(0, 0, 0, 0.68);

    backdrop-filter: blur(7px);
    -webkit-backdrop-filter: blur(7px);
}

.modal.hidden {
    display: none !important;
}

.modal-content {
    width: min(500px, 100%);

    max-height: calc(100vh - 36px);
    max-height: calc(100dvh - 36px);

    overflow-y: auto;

    padding: 20px;

    background: var(--panel-2);

    border: 1px solid var(--border);

    border-radius: 12px;

    box-shadow:
        0 30px 80px rgba(0, 0, 0, 0.55);
}

.modal-title {
    margin-bottom: 14px;

    font-size: 20px;
    font-weight: 700;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;

    margin-top: 18px;
}

/* =========================================================
   GAME RESULT
   ========================================================= */

.game-result {
    position: absolute;

    inset: 0;

    z-index: 50;

    display: flex;
    align-items: center;
    justify-content: center;

    background: rgba(0, 0, 0, 0.58);

    backdrop-filter: blur(3px);
}

.game-result-card {
    width: min(350px, calc(100% - 30px));

    padding: 22px;

    text-align: center;

    background: rgba(20, 21, 26, 0.96);

    border: 1px solid var(--border);

    border-radius: 12px;

    box-shadow: var(--shadow);
}

.game-result-title {
    font-size: 24px;
    font-weight: 800;
}

.game-result-text {
    margin-top: 7px;

    color: var(--text-soft);
}

.game-result-actions {
    display: flex;

    gap: 8px;

    margin-top: 18px;
}

.game-result-actions .btn {
    flex: 1;
}

/* =========================================================
   NOTIFICATIONS
   ========================================================= */

.toast-container {
    position: fixed;

    right: 16px;
    bottom: 16px;

    z-index: 2000;

    display: flex;
    flex-direction: column;
    gap: 8px;

    width: min(350px, calc(100vw - 32px));
}

.toast {
    padding: 11px 13px;

    background: rgba(27, 29, 36, 0.96);

    border: 1px solid var(--border);

    border-radius: 9px;

    box-shadow: var(--shadow);

    font-size: 13px;
}

/* =========================================================
   SCROLLBARS
   ========================================================= */

* {
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.15) transparent;
}

::-webkit-scrollbar {
    width: 7px;
    height: 7px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.15);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255,255,255,0.25);
}

/* =========================================================
   TABLET
   ========================================================= */

@media (max-width: 1100px) {

    :root {
        --board-size: min(72vw, 680px);
    }

    .main,
    main {
        grid-template-columns:
            minmax(0, 1fr)
            300px;

        gap: 12px;

        padding: 12px;
    }

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

}

/* =========================================================
   SMALL TABLET / LARGE PHONE
   ========================================================= */

@media (max-width: 820px) {

    :root {
        --board-size: min(
            calc(100vw - 24px),
            680px
        );
    }

    .main,
    main {
        display: flex;
        flex-direction: column;

        width: 100%;

        padding: 10px;
    }

    .game-area {
        width: 100%;
    }

    .sidebar {
        width: 100%;

        display: grid;

        grid-template-columns:
            repeat(2, minmax(0, 1fr));

        align-items: start;
    }

    .sidebar .chat {
        grid-column: 1 / -1;
    }

    .board-wrapper {
        width: min(
            calc(100vw - 20px),
            680px
        );
    }

    .game-controls {
        width: min(
            calc(100vw - 20px),
            680px
        );
    }
}

/* =========================================================
   PHONE
   ========================================================= */

@media (max-width: 600px) {

    :root {
        --board-size: calc(100vw - 16px);
    }

    body {
        overflow-x: hidden;
    }

    .topbar,
    header {
        min-height: 54px;

        padding:
            8px 9px;

        position: relative;
    }

    .logo {
        font-size: 16px;
    }

    .header-actions {
        gap: 5px;
    }

    .header-actions .btn {
        min-height: 36px;
        padding: 6px 9px;

        font-size: 12px;
    }

    .main,
    main {
        width: 100%;

        padding: 8px;

        gap: 10px;
    }

    .board-wrapper {
        width: calc(100vw - 16px);
        max-width: none;

        border-radius: 2px;
    }

    #board,
    .chessboard,
    .board {
        width: 100% !important;
        height: 100% !important;
    }

    .piece {
        width: 94%;
        height: 94%;

        font-size: calc(
            (100vw - 16px) / 10
        );
    }

    .player {
        width: calc(100vw - 16px);

        min-height: 43px;

        padding: 5px 7px;

        margin-bottom: 6px;
    }

    .player-avatar {
        width: 27px;
        height: 27px;

        flex-basis: 27px;
    }

    .player-name {
        max-width: 150px;

        font-size: 13px;
    }

    .player-status {
        font-size: 10px;
    }

    .clock {
        min-width: 68px;

        padding: 5px 7px;

        font-size: 15px;
    }

    .game-controls {
        width: calc(100vw - 16px);

        grid-template-columns:
            repeat(2, minmax(0, 1fr));

        gap: 6px;

        margin-top: 8px;
    }

    .game-controls .btn {
        min-height: 40px;

        padding: 7px 8px;

        font-size: 12px;
    }

    .sidebar {
        display: flex;

        width: 100%;
    }

    .panel {
        border-radius: 9px;
    }

    .chat {
        height: 330px;
    }

    .modal {
        padding: 10px;
    }

    .modal-content {
        padding: 16px;

        border-radius: 10px;
    }

    .modal-actions {
        flex-direction: column;
    }

    .modal-actions .btn {
        width: 100%;
    }

    .game-result-actions {
        flex-direction: column;
    }

    .game-result-actions .btn {
        width: 100%;
    }
}

/* =========================================================
   VERY SMALL PHONES
   ========================================================= */

@media (max-width: 380px) {

    .main,
    main {
        padding: 5px;
    }

    .board-wrapper,
    .player,
    .game-controls {
        width: calc(100vw - 10px);
    }

    .piece {
        font-size: calc(
            (100vw - 10px) / 10
        );
    }

    .clock {
        min-width: 62px;

        font-size: 14px;
    }

    .player-name {
        max-width: 105px;
    }

    .game-controls .btn {
        font-size: 11px;
        padding: 6px;
    }
}

/* =========================================================
   LANDSCAPE PHONE
   ========================================================= */

@media (max-height: 600px) and (orientation: landscape) {

    :root {
        --board-size: min(
            calc(100vh - 90px),
            calc(100vw - 250px)
        );
    }

    .topbar,
    header {
        min-height: 46px;
        padding: 5px 10px;
    }

    .main,
    main {
        display: flex;
        flex-direction: row;

        align-items: flex-start;

        padding: 8px;
    }

    .game-area {
        flex: 1;
    }

    .sidebar {
        width: 280px;

        flex: 0 0 280px;

        max-height: calc(100vh - 62px);

        overflow-y: auto;
    }

    .board-wrapper {
        width: var(--board-size);
    }

    .player,
    .game-controls {
        width: var(--board-size);
    }

    .chat {
        height: 260px;
    }
}

/* =========================================================
   SAFE AREA — ANDROID / IOS
   ========================================================= */

@supports (padding: env(safe-area-inset-bottom)) {

    .topbar,
    header {
        padding-top:
            max(
                8px,
                env(safe-area-inset-top)
            );
    }

    body {
        padding-bottom:
            env(safe-area-inset-bottom);
    }

}

/* =========================================================
   REDUCED MOTION
   ========================================================= */

@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}