/* =========================================================
   CARO 5 — DARK NEON UI
   ========================================================= */

* {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html,
body {
    margin: 0;
    padding: 0;
    width: 100%;
    min-height: 100%;
}

body {
    font-family:
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Arial,
        sans-serif;

    background:
        radial-gradient(
            circle at 50% 0%,
            #182131 0%,
            #0b0e14 42%,
            #050609 100%
        );

    color: #f5f7fb;

    overflow-x: hidden;
}

button,
select,
input {
    font: inherit;
}

button {
    border: 0;
    cursor: pointer;
}

button:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.hidden {
    display: none !important;
}


/* =========================================================
   SCREEN
   ========================================================= */

.screen {
    width: 100%;
    min-height: 100vh;

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

    padding: 20px;
}


/* =========================================================
   MENU CARD
   ========================================================= */

.menu-card {
    position: relative;

    width: min(440px, 100%);

    padding: 32px 25px;

    background:
        linear-gradient(
            145deg,
            rgba(25, 30, 41, 0.98),
            rgba(12, 15, 21, 0.99)
        );

    border:
        1px solid
        rgba(105, 125, 155, 0.20);

    border-radius: 25px;

    box-shadow:
        0 25px 70px
        rgba(0, 0, 0, 0.55),

        0 0 45px
        rgba(55, 150, 255, 0.05);

    text-align: center;
}


/* =========================================================
   LOGO
   ========================================================= */

.logo {
    font-size: 48px;
    line-height: 1;

    margin-bottom: 12px;

    filter:
        drop-shadow(
            0 0 12px
            rgba(255, 55, 95, 0.35)
        );
}

.menu-card h1 {
    margin: 0;

    color: #ffffff;

    font-size: 38px;
    font-weight: 850;

    letter-spacing: 2px;

    text-shadow:
        0 0 22px
        rgba(255, 255, 255, 0.08);
}

.subtitle {
    margin: 8px 0 26px;

    color: #9299a8;

    font-size: 14px;
}


/* =========================================================
   SECTION
   ========================================================= */

.section {
    margin-top: 20px;

    text-align: left;
}

.section h3 {
    margin: 0 0 10px;

    color: #c8ced9;

    font-size: 14px;
    font-weight: 750;
}


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

.mode-row {
    display: grid;

    grid-template-columns:
        1fr 1fr;

    gap: 10px;
}

.mode-btn {
    position: relative;

    min-height: 50px;

    padding: 10px 12px;

    border:
        1px solid
        rgba(110, 135, 170, 0.28);

    border-radius: 13px;

    background:
        linear-gradient(
            145deg,
            #1b202b,
            #11141b
        );

    color: #aeb5c2;

    font-weight: 750;

    box-shadow:
        inset 0 1px 0
        rgba(255, 255, 255, 0.04),

        0 4px 14px
        rgba(0, 0, 0, 0.22);

    transition:
        transform 0.15s ease,
        border-color 0.2s ease,
        box-shadow 0.2s ease,
        color 0.2s ease;
}

.mode-btn:hover {
    color: white;

    border-color:
        rgba(130, 165, 210, 0.5);

    box-shadow:
        0 0 12px
        rgba(70, 150, 255, 0.10),

        inset 0 1px 0
        rgba(255, 255, 255, 0.06);
}

.mode-btn:active {
    transform: scale(0.97);
}

.mode-btn.active {
    color: white;

    border-color:
        rgba(255, 65, 100, 0.75);

    background:
        linear-gradient(
            145deg,
            #2a2029,
            #17151b
        );

    box-shadow:
        0 0 8px
        rgba(255, 55, 95, 0.35),

        0 0 22px
        rgba(255, 55, 95, 0.12),

        inset 0 0 14px
        rgba(255, 55, 95, 0.06);
}


/* =========================================================
   BOARD SIZE
   ========================================================= */

#boardSizeSelect {
    width: 100%;
    height: 50px;

    padding:
        0 42px
        0 15px;

    border:
        1px solid
        rgba(90, 140, 190, 0.38);

    border-radius: 13px;

    outline: none;

    background:
        linear-gradient(
            145deg,
            #1b202a,
            #11141a
        );

    color: #edf1f7;

    cursor: pointer;

    /*
       Bỏ giao diện select mặc định
       của trình duyệt.
    */
    appearance: none;
    -webkit-appearance: none;

    /*
       Mũi tên custom.
    */
    background-image:
        linear-gradient(45deg, transparent 50%, #7fdcff 50%),
        linear-gradient(135deg, #7fdcff 50%, transparent 50%);

    background-position:
        calc(100% - 19px) 21px,
        calc(100% - 13px) 21px;

    background-size:
        6px 6px,
        6px 6px;

    background-repeat: no-repeat;

    box-shadow:
        inset 0 1px 0
        rgba(255, 255, 255, 0.04),

        0 0 10px
        rgba(50, 180, 255, 0.05);

    transition:
        border-color 0.2s ease,
        box-shadow 0.2s ease;
}

#boardSizeSelect:hover {
    border-color:
        rgba(90, 190, 255, 0.65);

    box-shadow:
        0 0 14px
        rgba(50, 180, 255, 0.10);
}

#boardSizeSelect:focus {
    border-color:
        rgba(70, 205, 255, 0.85);

    box-shadow:
        0 0 0 3px
        rgba(50, 190, 255, 0.08),

        0 0 20px
        rgba(50, 190, 255, 0.14);
}

#boardSizeSelect option {
    background: #141820;
    color: #ffffff;
}


/* =========================================================
   AI DIFFICULTY
   ========================================================= */

/*
   Nếu main.js đang dùng select cho độ khó,
   selector này sẽ tự áp dụng cho select đó.
*/

#difficultySelect,
#aiDifficulty,
select[name="difficulty"],
select[id*="difficulty" i] {
    width: 100%;
    height: 50px;

    padding:
        0 42px
        0 15px;

    border:
        1px solid
        rgba(175, 105, 255, 0.40);

    border-radius: 13px;

    outline: none;

    background:
        linear-gradient(
            145deg,
            #201a2b,
            #131119
        );

    color: #f1eaff;

    cursor: pointer;

    appearance: none;
    -webkit-appearance: none;

    background-image:
        linear-gradient(45deg, transparent 50%, #c88cff 50%),
        linear-gradient(135deg, #c88cff 50%, transparent 50%);

    background-position:
        calc(100% - 19px) 21px,
        calc(100% - 13px) 21px;

    background-size:
        6px 6px,
        6px 6px;

    background-repeat: no-repeat;

    box-shadow:
        inset 0 1px 0
        rgba(255, 255, 255, 0.04),

        0 0 12px
        rgba(180, 90, 255, 0.07);

    transition:
        border-color 0.2s ease,
        box-shadow 0.2s ease;
}

#difficultySelect:hover,
#aiDifficulty:hover,
select[name="difficulty"]:hover,
select[id*="difficulty" i]:hover {
    border-color:
        rgba(205, 130, 255, 0.75);

    box-shadow:
        0 0 15px
        rgba(180, 90, 255, 0.14);
}

#difficultySelect:focus,
#aiDifficulty:focus,
select[name="difficulty"]:focus,
select[id*="difficulty" i]:focus {
    border-color:
        #cf8cff;

    box-shadow:
        0 0 0 3px
        rgba(190, 100, 255, 0.08),

        0 0 22px
        rgba(190, 100, 255, 0.18);
}

#difficultySelect option,
#aiDifficulty option,
select[name="difficulty"] option,
select[id*="difficulty" i] option {
    background: #16121d;
    color: white;
}


/* =========================================================
   MAIN PLAY BUTTON
   ========================================================= */

.main-btn {
    position: relative;

    width: 100%;
    min-height: 55px;

    margin-top: 23px;

    border:
        1px solid
        rgba(255, 100, 125, 0.55);

    border-radius: 14px;

    background:
        linear-gradient(
            135deg,
            #ff315a,
            #d91e48
        );

    color: white;

    font-size: 17px;
    font-weight: 850;

    box-shadow:
        0 0 10px
        rgba(255, 45, 85, 0.25),

        0 9px 28px
        rgba(255, 45, 85, 0.18);

    transition:
        transform 0.15s ease,
        box-shadow 0.2s ease;
}

.main-btn:hover {
    box-shadow:
        0 0 18px
        rgba(255, 45, 85, 0.38),

        0 10px 35px
        rgba(255, 45, 85, 0.22);
}

.main-btn:active {
    transform: scale(0.98);
}


/* =========================================================
   DIVIDER
   ========================================================= */

.divider {
    display: flex;
    align-items: center;

    gap: 10px;

    margin: 24px 0 16px;

    color: #707786;

    font-size: 11px;
    font-weight: 750;
}

.divider::before,
.divider::after {
    content: "";

    flex: 1;

    height: 1px;

    background:
        linear-gradient(
            90deg,
            transparent,
            rgba(130, 150, 180, 0.22),
            transparent
        );
}


/* =========================================================
   ONLINE BUTTON
   ========================================================= */

.online-btn {
    width: 100%;
    min-height: 51px;

    border:
        1px solid
        rgba(55, 220, 155, 0.35);

    border-radius: 13px;

    background:
        linear-gradient(
            145deg,
            #17231f,
            #101713
        );

    color: #c8fbe5;

    font-weight: 800;

    box-shadow:
        0 0 12px
        rgba(50, 220, 150, 0.06);

    transition:
        border-color 0.2s ease,
        box-shadow 0.2s ease,
        background 0.2s ease;
}

.online-btn:hover {
    border-color:
        rgba(55, 240, 165, 0.75);

    background:
        linear-gradient(
            145deg,
            #1b2d25,
            #111a15
        );

    box-shadow:
        0 0 16px
        rgba(50, 220, 150, 0.14);
}

.online-btn:active {
    transform: scale(0.98);
}


/* =========================================================
   JOIN ROOM
   ========================================================= */

.join-row {
    display: grid;

    grid-template-columns:
        1fr 110px;

    gap: 8px;

    margin-top: 11px;
}

.join-row input {
    width: 100%;
    min-width: 0;

    height: 49px;

    padding: 0 14px;

    border:
        1px solid
        rgba(90, 145, 195, 0.38);

    border-radius: 12px;

    outline: none;

    background:
        linear-gradient(
            145deg,
            #171c25,
            #10131a
        );

    color: #ffffff;

    text-transform: uppercase;

    box-shadow:
        inset 0 1px 0
        rgba(255, 255, 255, 0.035),

        0 0 10px
        rgba(50, 160, 255, 0.04);

    transition:
        border-color 0.2s ease,
        box-shadow 0.2s ease;
}

.join-row input::placeholder {
    color: #69717f;
}

.join-row input:hover {
    border-color:
        rgba(80, 180, 255, 0.58);
}

.join-row input:focus {
    border-color:
        rgba(70, 200, 255, 0.85);

    box-shadow:
        0 0 0 3px
        rgba(50, 180, 255, 0.07),

        0 0 18px
        rgba(50, 180, 255, 0.13);
}

.join-row button {
    min-height: 49px;

    border:
        1px solid
        rgba(90, 150, 210, 0.40);

    border-radius: 12px;

    background:
        linear-gradient(
            145deg,
            #202a38,
            #151b24
        );

    color: #eef6ff;

    font-weight: 750;

    box-shadow:
        0 0 10px
        rgba(60, 160, 255, 0.06);

    transition:
        border-color 0.2s ease,
        box-shadow 0.2s ease,
        transform 0.15s ease;
}

.join-row button:hover {
    border-color:
        rgba(80, 190, 255, 0.75);

    box-shadow:
        0 0 16px
        rgba(50, 170, 255, 0.14);
}

.join-row button:active {
    transform: scale(0.97);
}


/* =========================================================
   FIREBASE STATUS
   ========================================================= */

.firebase-status {
    margin-top: 16px;

    color: #737b89;

    font-size: 12px;
}


/* =========================================================
   GAME CONTAINER
   ========================================================= */

.game-container {
    width: 100%;
    max-width: 1100px;

    min-height: 100vh;

    padding:
        16px
        18px
        30px;

    display: flex;
    flex-direction: column;
}


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

.game-header {
    display: flex;
    align-items: center;

    min-height: 50px;

    gap: 12px;

    flex-shrink: 0;
}

.small-btn {
    flex-shrink: 0;

    min-height: 42px;

    padding: 0 14px;

    border:
        1px solid
        rgba(100, 130, 165, 0.25);

    border-radius: 11px;

    background: #151a22;
    color: #e9edf4;

    box-shadow:
        0 5px 18px
        rgba(0, 0, 0, 0.25);

    font-weight: 700;

    transition:
        background 0.15s ease,
        border-color 0.15s ease,
        box-shadow 0.15s ease;
}

.small-btn:hover {
    background: #1c222c;

    border-color:
        rgba(100, 190, 255, 0.45);

    box-shadow:
        0 0 13px
        rgba(60, 180, 255, 0.08);
}

.game-title {
    display: flex;
    flex-direction: column;

    min-width: 0;
}

.game-title strong {
    font-size: 21px;

    color: #ffffff;
}

.game-title span {
    margin-top: 2px;

    color: #737b89;

    font-size: 12px;
}


/* =========================================================
   ONLINE NOTICE
   ========================================================= */

.online-notice {
    width: 100%;

    margin-top: 10px;

    padding: 10px 14px;

    border:
        1px solid
        rgba(255, 210, 80, 0.15);

    border-radius: 11px;

    background:
        rgba(255, 190, 40, 0.07);

    color: #e7ca72;

    text-align: center;

    font-size: 13px;
    font-weight: 600;

    flex-shrink: 0;
}


/* =========================================================
   RESULT BOX
   ========================================================= */

.result-box {
    width: 100%;

    margin: 12px 0;

    padding: 14px;

    border:
        1px solid
        rgba(100, 130, 165, 0.18);

    border-radius: 16px;

    background:
        linear-gradient(
            145deg,
            #171c25,
            #0e1117
        );

    box-shadow:
        0 12px 35px
        rgba(0, 0, 0, 0.35);

    text-align: center;

    flex-shrink: 0;
}

#resultText {
    margin-bottom: 12px;

    color: #ffffff;

    font-size: 20px;
    font-weight: 800;

    text-shadow:
        0 0 18px
        rgba(255, 255, 255, 0.10);
}

.result-buttons {
    display: flex;

    justify-content: center;

    gap: 8px;
}

.result-btn {
    min-height: 44px;

    padding: 0 16px;

    border-radius: 11px;

    font-size: 14px;
    font-weight: 700;
}

.play-again-btn {
    background:
        linear-gradient(
            135deg,
            #ff3158,
            #d91f48
        );

    color: white;

    box-shadow:
        0 5px 18px
        rgba(255, 45, 85, 0.16);
}

.exit-menu-btn {
    background: #1b1f27;
    color: #c8cdd7;

    border:
        1px solid
        rgba(255, 255, 255, 0.07);
}


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

.info-panel {
    display: grid;

    grid-template-columns:
        1fr auto 1fr;

    align-items: center;

    gap: 12px;

    margin: 14px auto;

    width: min(700px, 100%);

    flex-shrink: 0;
}

.player-box {
    display: flex;
    align-items: center;

    gap: 9px;

    padding: 10px 13px;

    background:
        rgba(18, 22, 29, 0.96);

    border:
        1px solid
        rgba(100, 130, 165, 0.16);

    border-radius: 14px;

    box-shadow:
        0 5px 18px
        rgba(0, 0, 0, 0.25);
}

.o-player {
    justify-content: flex-end;

    text-align: right;
}

.player-symbol {
    width: 40px;
    height: 40px;

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

    flex-shrink: 0;

    border-radius: 10px;

    background: #11151b;

    font-size: 23px;
    font-weight: 900;
}

.x-player .player-symbol {
    color: #ff315c;

    text-shadow:
        0 0 8px rgba(255, 45, 85, 0.85),
        0 0 18px rgba(255, 45, 85, 0.42);
}

.o-player .player-symbol {
    color: #32d7ff;

    text-shadow:
        0 0 8px rgba(50, 215, 255, 0.85),
        0 0 18px rgba(50, 215, 255, 0.42);
}

.player-name {
    color: #f0f2f6;

    font-size: 14px;
    font-weight: 800;
}

.score-label {
    margin-top: 2px;

    color: #707784;

    font-size: 12px;
}

.turn-box {
    min-width: 90px;

    text-align: center;
}

#turnText {
    margin-bottom: 5px;

    color: #b7bdc9;

    font-size: 12px;
    font-weight: 800;
}

.timer-circle {
    width: 48px;
    height: 48px;

    margin: 0 auto;

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

    border:
        1px solid
        rgba(80, 190, 255, 0.24);

    border-radius: 50%;

    background:
        radial-gradient(
            circle,
            #202a38,
            #11151b
        );

    color: #ffffff;

    font-size: 17px;
    font-weight: 800;

    box-shadow:
        0 0 15px
        rgba(50, 180, 255, 0.09);
}


/* =========================================================
   BOARD AREA
   ========================================================= */

.board-scroll {
    width: 100%;

    flex: 1;

    min-height: 0;

    display: flex;

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

    padding: 8px;

    overflow: hidden;

    -webkit-overflow-scrolling: touch;
}


/* =========================================================
   NEON BOARD
   ========================================================= */

.board {
    --board-size: 15;
    --cell-size: 34px;

    display: grid;

    grid-template-columns:
        repeat(
            var(--board-size),
            var(--cell-size)
        );

    grid-template-rows:
        repeat(
            var(--board-size),
            var(--cell-size)
        );

    width: max-content;
    height: max-content;

    flex-shrink: 0;

    background:
        radial-gradient(
            circle at center,
            #172b40 0%,
            #102031 55%,
            #0a1521 100%
        );

    border:
        2px solid
        rgba(70, 195, 255, 0.60);

    box-sizing: content-box;

    box-shadow:
        0 0 8px
        rgba(40, 190, 255, 0.38),

        0 0 22px
        rgba(40, 150, 255, 0.17),

        inset 0 0 25px
        rgba(40, 150, 255, 0.08);

    contain: layout paint;
}


/* =========================================================
   CELLS
   ========================================================= */

.cell {
    width: var(--cell-size);
    height: var(--cell-size);

    min-width: var(--cell-size);
    min-height: var(--cell-size);

    padding: 0;
    margin: 0;

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

    border:
        1px solid
        rgba(75, 195, 255, 0.30);

    background:
        linear-gradient(
            145deg,
            rgba(36, 57, 78, 0.96),
            rgba(20, 37, 54, 0.96)
        );

    font-size:
        calc(
            var(--cell-size) * 0.68
        );

    font-weight: 900;

    line-height: 1;

    box-sizing: border-box;

    appearance: none;
    -webkit-appearance: none;

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

    touch-action: manipulation;

    overflow: hidden;

    transition:
        background 0.12s ease,
        box-shadow 0.12s ease;
}

.cell:hover {
    background:
        linear-gradient(
            145deg,
            rgba(46, 72, 98, 0.98),
            rgba(26, 47, 68, 0.98)
        );

    box-shadow:
        inset 0 0 10px
        rgba(70, 190, 255, 0.13);
}

.cell:active {
    background:
        rgba(55, 82, 108, 0.95);
}


/* =========================================================
   X / O NEON
   ========================================================= */

.cell.x {
    color: #ff315b;

    text-shadow:
        0 0 4px #ff315b,
        0 0 9px rgba(255, 49, 91, 0.95),
        0 0 18px rgba(255, 49, 91, 0.65),
        0 0 28px rgba(255, 49, 91, 0.25);
}

.cell.o {
    color: #32d7ff;

    text-shadow:
        0 0 4px #32d7ff,
        0 0 9px rgba(50, 215, 255, 0.95),
        0 0 18px rgba(50, 215, 255, 0.65),
        0 0 28px rgba(50, 215, 255, 0.25);
}


/* =========================================================
   LAST MOVE
   ========================================================= */

.cell.last-move {
    box-shadow:
        inset 0 0 0 2px
        rgba(255, 255, 255, 0.85),

        inset 0 0 12px
        rgba(255, 255, 255, 0.15),

        0 0 8px
        rgba(255, 255, 255, 0.12);
}

.cell.x.last-move {
    box-shadow:
        inset 0 0 0 2px
        rgba(255, 80, 110, 0.95),

        0 0 10px
        rgba(255, 45, 85, 0.4);
}

.cell.o.last-move {
    box-shadow:
        inset 0 0 0 2px
        rgba(70, 220, 255, 0.95),

        0 0 10px
        rgba(40, 200, 255, 0.4);
}


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

.bottom-buttons {
    display: flex;

    justify-content: center;

    gap: 8px;

    margin-top: 12px;

    flex-shrink: 0;
}

.action-btn {
    min-height: 42px;

    padding: 0 14px;

    border:
        1px solid
        rgba(100, 130, 165, 0.22);

    border-radius: 11px;

    background: #151a22;

    color: #d5d9e1;

    box-shadow:
        0 4px 14px
        rgba(0, 0, 0, 0.2);

    font-size: 13px;
    font-weight: 700;
}


/* =========================================================
   GAMEHUB BUTTON
   ========================================================= */

#gameHubButton {
    position: fixed;

    top: 20px;
    left: 20px;

    z-index: 1000;

    padding: 10px 16px;

    border:
        1px solid
        rgba(100, 150, 190, 0.30);

    border-radius: 10px;

    background:
        rgba(16, 20, 27, 0.94);

    color: #dfe4ed;

    cursor: pointer;

    font-size: 14px;
    font-weight: 600;

    box-shadow:
        0 5px 18px
        rgba(0, 0, 0, 0.3),

        0 0 10px
        rgba(50, 170, 255, 0.05);

    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);

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

#gameHubButton:hover {
    background: #1b202a;

    border-color:
        rgba(70, 200, 255, 0.55);

    box-shadow:
        0 0 15px
        rgba(50, 180, 255, 0.12);
}

#gameHubButton:active {
    transform: scale(0.96);
}


/* =========================================================
   PC / LAPTOP
   ========================================================= */

@media (min-width: 700px) {

    .screen {
        padding: 0;
    }

    .game-container {
        width: 100%;
        max-width: 1100px;

        height: 100vh;
        min-height: 0;

        padding:
            14px
            18px
            14px;
    }

    .board-scroll {
        flex: 1;
        min-height: 0;

        padding: 6px;

        overflow: hidden;

        justify-content: center;
        align-items: center;
    }

    .board {
        --cell-size: 34px;
    }

    .bottom-buttons {
        min-height: 42px;
    }
}


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

@media (min-width: 500px) and (max-width: 699px) {

    .game-container {
        min-height: 100vh;

        padding:
            12px
            14px
            20px;
    }

    .board-scroll {
        justify-content: center;
        align-items: center;

        overflow: auto;

        padding: 8px;
    }

    .board {
        --cell-size: 32px;
    }
}


/* =========================================================
   MOBILE
   ========================================================= */

@media (max-width: 499px) {

    .screen {
        padding: 12px;
    }


    /* MENU */

    .menu-card {
        padding:
            27px
            18px;

        border-radius: 21px;
    }

    .menu-card h1 {
        font-size: 32px;
    }

    .logo {
        font-size: 42px;
    }


    /* GAME */

    .game-container {
        min-height: 100vh;

        padding:
            10px
            8px
            20px;
    }

    .game-header {
        min-height: 44px;
    }

    .small-btn {
        min-height: 38px;

        padding:
            0 11px;

        font-size: 13px;
    }

    .game-title strong {
        font-size: 18px;
    }


    /* INFO */

    .info-panel {
        gap: 6px;

        margin:
            10px auto;
    }

    .player-box {
        padding:
            7px
            8px;

        gap: 6px;

        border-radius: 11px;
    }

    .player-symbol {
        width: 34px;
        height: 34px;

        font-size: 20px;
    }

    .player-name {
        font-size: 12px;
    }

    .score-label {
        font-size: 10px;
    }

    .turn-box {
        min-width: 70px;
    }

    #turnText {
        font-size: 10px;
    }

    .timer-circle {
        width: 42px;
        height: 42px;

        font-size: 15px;
    }


    /* BOARD */

    .board-scroll {
        justify-content: flex-start;
        align-items: center;

        padding: 5px;

        overflow: auto;

        -webkit-overflow-scrolling: touch;
    }

    .board {
        --cell-size: 32px;
    }


    /* RESULT */

    .result-buttons {
        flex-direction: column;
    }

    .result-btn {
        width: 100%;
    }


    /* BOTTOM */

    .bottom-buttons {
        flex-wrap: wrap;
    }


    /* GAMEHUB */

    #gameHubButton {
        top: 12px;
        left: 12px;

        padding:
            9px
            13px;

        font-size: 13px;
    }
}


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

@media (max-width: 360px) {

    .mode-row {
        grid-template-columns: 1fr;
    }

    .join-row {
        grid-template-columns: 1fr;
    }

    .board {
        --cell-size: 29px;
    }

    .info-panel {
        gap: 3px;
    }

    .player-box {
        padding: 6px;
    }

    .player-symbol {
        width: 30px;
        height: 30px;

        font-size: 18px;
    }

    .turn-box {
        min-width: 62px;
    }
}