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

:root {
    --bg-app: linear-gradient(140deg, #13223b 0%, #2f4f4f 46%, #7a5334 100%);
    --bg-card: #ffffff;
    --text-main: #1f2937;
    --text-muted: #4b5563;
    --line-soft: #d8dde6;
    --primary: #0c6a5a;
    --primary-dark: #08463b;
    --warning: #ffc107;
    --danger: #d9363e;
    --shadow-strong: 0 16px 36px rgba(12, 24, 45, 0.22);
    --shadow-soft: 0 10px 24px rgba(24, 30, 50, 0.12);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-main);
    min-height: 100vh;
}

body:not(.app-layout) {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

body.app-layout {
    background: var(--bg-app);
    padding: 146px 20px 40px;
}

.container {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 20px;
    box-shadow: var(--shadow-strong);
    width: 100%;
    max-width: 930px;
}

.rooms-page h1 {
    margin-bottom: 14px;
}

.container.rooms-page {
    margin: 0 auto;
}

.hidden {
    display: none !important;
}

.top-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 999;
    backdrop-filter: blur(8px);
    background: rgba(7, 17, 33, 0.9);
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.top-bar-inner {
    width: min(1240px, calc(100% - 32px));
    margin: 0 auto;
    min-height: 120px;
    padding: 12px 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

.top-bar-title {
    font-size: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 1.4px;
    color: #f8fafc;
    text-align: center;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.45);
}

.main-nav {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
}

.main-nav .nav-link {
    color: #e5e7eb;
    background: transparent;
    font-size: 0.9rem;
    font-weight: 700;
    padding: 8px 12px;
    border-radius: 999px;
    border: 1px solid transparent;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.main-nav .nav-link:hover,
.main-nav .nav-link.active {
    color: #ffffff;
    background: rgba(12, 106, 90, 0.8);
    border-color: rgba(255, 255, 255, 0.2);
}

.site-main {
    width: min(1240px, 100%);
    margin: 0 auto;
}

.page-section {
    width: 100%;
}

.section-panel {
    display: none;
}

.section-panel.is-active {
    display: block;
}

.intro-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
}

.content-block,
.content-card {
    background: #fff;
    border: 1px solid var(--line-soft);
    border-radius: 14px;
    box-shadow: var(--shadow-soft);
}

.content-block {
    padding: 20px;
}

.content-card {
    padding: 20px;
}

.section-title {
    font-size: clamp(1.35rem, 2.1vw, 1.9rem);
    margin-bottom: 12px;
    color: #10253f;
}

.section-description,
.lead-text {
    margin-bottom: 12px;
    color: var(--text-muted);
    line-height: 1.55;
}

.card-title {
    margin-bottom: 10px;
    font-size: 1.15rem;
    color: #14345f;
}

.content-list {
    margin: 8px 0 14px 20px;
    color: #334155;
    line-height: 1.55;
}

.primary-cta,
.secondary-button,
.danger-button,
.primary-link-button,
#createRoom,
.room-actions-inline button,
#newGame {
    border: none;
    border-radius: 10px;
    padding: 10px 16px;
    font-size: 0.92rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s ease, filter 0.2s ease;
}

.primary-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    background: linear-gradient(45deg, #0c6a5a, #15a085);
    color: #fff;
    min-width: 140px;
}

.secondary-button {
    background: #ecf1f6;
    color: #1f2937;
}

.danger-button {
    background: #d9363e;
    color: #fff;
}

.primary-link-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    background: #0d6efd;
    color: #fff;
}

#createRoom {
    background: #0d6efd;
    color: #fff;
}

#newGame {
    background: linear-gradient(45deg, #27ae60, #19b36f);
    color: #ffffff;
}

.room-actions-inline .join-player {
    background: #198754;
    color: #fff;
}

.room-actions-inline .join-spectator {
    background: #6c757d;
    color: #fff;
}

.primary-cta:hover,
.secondary-button:hover,
.danger-button:hover,
.primary-link-button:hover,
#createRoom:hover,
.room-actions-inline button:hover,
#newGame:hover {
    filter: brightness(0.96);
    transform: translateY(-1px);
}

.secondary-button:disabled,
.danger-button:disabled,
.primary-link-button:disabled,
#createRoom:disabled,
.room-actions-inline button:disabled,
#newGame:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
}

.board-preview-card {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.board-preview-image {
    width: min(100%, 760px);
    display: block;
    border-radius: 12px;
    border: 1px solid #c7d2fe;
    box-shadow: var(--shadow-soft);
    background: #f8fafc;
    margin: 10px auto 0;
}

.game-shell {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.room-section {
    border: 1px solid #dbe0e9;
    border-radius: 12px;
    padding: 12px;
    background: #ffffff;
}

.top-room-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.help-icon-btn {
    width: 34px;
    height: 34px;
    border-radius: 999px;
    border: 1px solid #9aa8ba;
    background: #ffffff;
    color: #1f2937;
    font-weight: 800;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: filter 0.2s ease, transform 0.2s ease;
}

.help-icon-btn:hover {
    filter: brightness(0.96);
    transform: translateY(-1px);
}

.room-share {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border-radius: 10px;
    background: #f8fafc;
    border: 1px solid #e4e9f2;
}

.top-room-actions .room-share {
    margin-left: auto;
}

.status-label {
    font-weight: 700;
    color: #495057;
    font-size: 0.9em;
}

.room-badge {
    background: #0d6efd;
    color: white;
    padding: 3px 10px;
    border-radius: 14px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.game-status-bar,
.players-section,
.game-info {
    margin-bottom: 10px;
    padding: 8px 12px;
    background: #f8f9fa;
    border-radius: 10px;
}

.game-status-bar,
.game-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.game-status {
    padding: 3px 10px;
    border-radius: 14px;
    font-weight: 700;
    font-size: 0.8em;
}

.game-status.waiting {
    background: #ffc107;
    color: #856404;
}

.game-status.playing {
    background: #28a745;
    color: #fff;
}

.game-status.finished {
    background: #dc3545;
    color: #fff;
}

.player-info {
    padding: 3px 10px;
    border-radius: 14px;
    font-weight: 700;
    font-size: 0.8em;
}

.player-info.red {
    background: #dc3545;
    color: #fff;
}

.player-info.black {
    background: #212529;
    color: #fff;
}

.player-info.spectator {
    background: #6c757d;
    color: #fff;
}

.players-line {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
}

.players-info {
    display: flex;
    justify-content: flex-start;
    gap: 8px;
    margin-bottom: 0;
}

.player-slot {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.08);
    font-size: 0.86em;
    white-space: nowrap;
}

.player-color {
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 12px;
    font-size: 0.72em;
}

.player-color.red {
    background: #dc3545;
    color: #fff;
}

.player-color.black {
    background: #212529;
    color: #fff;
}

.spectators-info {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
    font-size: 0.82em;
    color: #6c757d;
    white-space: nowrap;
}

.spectator-count {
    font-weight: 700;
    color: #495057;
}

.current-player,
.score {
    font-weight: 700;
    color: #495057;
}

.current-player span {
    color: #dc3545;
    transition: color 0.3s ease;
}

.current-player span.black-turn {
    color: #212529;
}

#gameCanvas {
    border: 3px solid #333;
    border-radius: 10px;
    cursor: pointer;
    margin: 12px auto;
    display: block;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    transition: transform 0.2s ease;
    max-width: 100%;
    height: auto;
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
}

#gameCanvas:hover {
    transform: scale(1.01);
}

.game-canvas-wrap {
    display: flex;
    justify-content: center;
}

.support-form {
    display: grid;
    gap: 10px;
    margin: 14px 0 22px;
}

.support-form label {
    font-weight: 700;
    color: #0f172a;
}

.support-form input,
.support-form select,
.support-form textarea {
    width: 100%;
    border: 1px solid #c9d4e3;
    border-radius: 10px;
    padding: 10px 12px;
    font-size: 0.95rem;
}

.support-form textarea {
    resize: vertical;
    min-height: 160px;
}

.support-form small {
    color: #64748b;
    margin-top: -4px;
}

.support-form-message {
    min-height: 18px;
    font-size: 0.9rem;
    font-weight: 700;
}

.support-form-message.success {
    color: #166534;
}

.support-form-message.error {
    color: #b91c1c;
}

.support-columns {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.report-guidelines {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
    margin-bottom: 18px;
}

.tutorial-box {
    margin-top: 14px;
    padding: 12px;
    border-radius: 10px;
    background: #f8fafc;
    border: 1px dashed #99a8bc;
}

.faq-list {
    display: grid;
    gap: 10px;
}

.faq-item {
    background: #fff;
    border-radius: 10px;
    border: 1px solid #d9e2ec;
    padding: 12px 14px;
    box-shadow: var(--shadow-soft);
}

.faq-item summary {
    cursor: pointer;
    font-weight: 700;
    color: #123357;
}

.faq-item p {
    margin-top: 8px;
    color: #334155;
    line-height: 1.5;
}

.lobby-section {
    text-align: left;
    margin-bottom: 16px;
    padding: 12px;
    border: 1px solid #e6e6e6;
    border-radius: 12px;
    background: #fcfcfd;
}

.lobby-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.lobby-header h2 {
    margin: 0;
    font-size: 1.05em;
    color: #2f3b4a;
}

.rooms-list-wrapper {
    overflow-x: auto;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    background: #fff;
}

.rooms-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9em;
}

.rooms-table th,
.rooms-table td {
    padding: 10px 8px;
    border-bottom: 1px solid #eef0f3;
    text-align: center;
}

.rooms-table th {
    background: #f5f7fa;
    color: #4b5563;
    font-weight: 700;
}

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

.empty-rooms {
    color: #6b7280;
    font-style: italic;
}

.rooms-page-actions {
    display: flex;
    gap: 8px;
}

.rooms-updated-at {
    margin-top: 10px;
    font-size: 0.85em;
    color: #6b7280;
    text-align: right;
}

.room-code-link {
    color: #0d6efd;
    font-weight: 700;
    text-decoration: none;
}

.room-code-link:hover {
    text-decoration: underline;
}

.room-actions-inline {
    display: flex;
    justify-content: center;
    gap: 6px;
}

.room-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 10px;
    padding: 8px 12px;
    background: #f8f9fa;
    border-radius: 10px;
}

.room-meta {
    display: flex;
    align-items: center;
    gap: 8px;
}

.privacy-badge {
    background: #6c757d;
    color: #fff;
    padding: 3px 10px;
    border-radius: 14px;
    font-size: 0.8em;
    font-weight: 700;
}

.privacy-badge.public {
    background: #198754;
}

.privacy-badge.private {
    background: #dc3545;
}

.room-actions {
    display: flex;
    gap: 8px;
}

.password-group input {
    padding: 8px 10px;
    border: 1px solid #ced4da;
    border-radius: 8px;
    min-width: 180px;
}

.create-room-card {
    background: #ffffff;
    border: 1px solid #e4e7ec;
    border-radius: 10px;
    padding: 12px;
    margin-bottom: 10px;
}

.create-room-card h3 {
    margin-bottom: 8px;
    color: #374151;
    font-size: 0.95em;
}

.create-room-form {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.private-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9em;
    color: #4b5563;
}

.rooms-directory-section {
    margin-bottom: 0;
}

.rooms-directory-table td {
    padding: 11px 8px;
}

.registration-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.registration-modal .modal-content {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    max-width: 420px;
    width: 90%;
    text-align: center;
}

.registration-modal .modal-content h2 {
    color: #333;
    margin-bottom: 20px;
}

.room-code-line {
    margin: -8px 0 12px;
    color: #6c757d;
    font-size: 0.9em;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}

.room-code-select {
    border: 1px solid #ced4da;
    border-radius: 8px;
    padding: 7px 10px;
    font-size: 0.9em;
    min-width: 160px;
    background: #fff;
}

.registration-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.registration-form input[type="text"] {
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1em;
    transition: border-color 0.3s ease;
}

.registration-form input[type="text"]:focus {
    outline: none;
    border-color: #667eea;
}

.color-selection {
    display: flex;
    justify-content: space-around;
    gap: 10px;
}

.color-selection label {
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    gap: 5px;
}

.color-selection input[type="radio"] {
    margin: 0;
}

.color-option {
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.9em;
    font-weight: 700;
    transition: all 0.3s ease;
}

.color-option.red {
    background: #dc3545;
    color: white;
}

.color-option.black {
    background: #212529;
    color: white;
}

.color-option.auto {
    background: #6c757d;
    color: white;
}

.color-selection input[type="radio"]:checked + .color-option {
    transform: scale(1.08);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.registration-buttons {
    display: flex;
    gap: 10px;
}

.registration-buttons button {
    flex: 1;
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.3s ease;
}

#registerPlayer {
    background: linear-gradient(45deg, #28a745, #20c997);
    color: white;
}

#joinAsSpectator {
    background: linear-gradient(45deg, #6c757d, #495057);
    color: white;
}

.registration-buttons button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.notification {
    position: fixed;
    top: 100px;
    right: 20px;
    padding: 15px 20px;
    border-radius: 8px;
    color: white;
    font-weight: 700;
    z-index: 2000;
    animation: slideIn 0.3s ease;
}

.notification.success {
    background: #28a745;
}

.notification.error {
    background: #dc3545;
}

.notification.warning {
    background: #ffc107;
    color: #856404;
}

.notification.info {
    background: #17a2b8;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@media (max-width: 1024px) {
    .intro-grid {
        grid-template-columns: 1fr;
    }

    .top-bar-inner {
        padding: 10px 0;
        gap: 8px;
    }

    .top-bar-title {
        font-size: 1.3rem;
    }

    body.app-layout {
        padding-top: 144px;
    }

    .notification {
        top: 150px;
    }
}

@media (max-width: 768px) {
    body.app-layout {
        padding: 154px 14px 24px;
    }

    .container,
    .content-block,
    .content-card {
        padding: 14px;
    }

    .main-nav {
        gap: 5px;
    }

    .main-nav .nav-link {
        font-size: 0.82rem;
        padding: 7px 10px;
    }

    .game-status-bar,
    .game-info {
        flex-wrap: wrap;
        justify-content: center;
        gap: 8px;
    }

    .players-info {
        gap: 6px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .players-line {
        flex-wrap: wrap;
        justify-content: center;
    }

    .support-columns {
        grid-template-columns: 1fr;
    }

    .report-guidelines {
        grid-template-columns: 1fr;
    }

    .registration-buttons,
    .room-actions-inline,
    .rooms-page-actions,
    .top-room-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .top-room-actions #newGame,
    .top-room-actions .danger-button,
    .top-room-actions .secondary-button,
    .rooms-page-actions .secondary-button,
    .rooms-page-actions .primary-link-button {
        width: 100%;
    }

    .top-room-actions .room-share {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
        margin-left: 0;
    }

    #gameCanvas {
        width: 100%;
        max-width: 420px;
        height: auto;
    }

    .lobby-header,
    .create-room-form,
    .room-header,
    .room-meta,
    .room-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .rooms-updated-at {
        text-align: center;
    }
}

/* Material 3 Expressive refresh: sanded-purple light theme */
:root {
    --bg-app: radial-gradient(1150px 620px at 12% -12%, #efe6ff 0%, transparent 55%),
        radial-gradient(980px 520px at 88% -18%, #f6e8dd 0%, transparent 52%),
        linear-gradient(170deg, #fdf8ff 0%, #f7f0fa 46%, #f5efe8 100%);
    --bg-card: #fffdfd;
    --text-main: #332843;
    --text-muted: #5d5470;
    --line-soft: #ddd1ea;
    --primary: #7651a9;
    --primary-dark: #5d3f8a;
    --warning: #efc96e;
    --danger: #c55474;
    --shadow-strong: 0 24px 46px rgba(84, 63, 121, 0.2);
    --shadow-soft: 0 12px 28px rgba(90, 70, 123, 0.14);
    --adsterra-horizontal-slot-width: 320px;
    --adsterra-horizontal-slot-height: 50px;
    --adsterra-horizontal-top-offset: calc(62px + env(safe-area-inset-top));
}

body {
    font-family: "Plus Jakarta Sans", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f3fb;
}

body.app-layout {
    position: relative;
    overflow-x: hidden;
    background: var(--bg-app);
}

body.app-layout::before,
body.app-layout::after {
    content: "";
    position: fixed;
    border-radius: 999px;
    filter: blur(26px);
    opacity: 0.56;
    pointer-events: none;
    z-index: 0;
}

body.app-layout::before {
    width: 300px;
    height: 300px;
    top: 86px;
    left: -85px;
    background: rgba(131, 95, 183, 0.28);
}

body.app-layout::after {
    width: 340px;
    height: 340px;
    bottom: -120px;
    right: -90px;
    background: rgba(206, 169, 127, 0.24);
}

body:not(.app-layout) {
    background: radial-gradient(920px 520px at 7% -18%, #f0e4ff 0%, transparent 54%),
        linear-gradient(170deg, #fcf8ff 0%, #f8f2fa 58%, #f5eee7 100%);
    align-items: flex-start;
    padding: 56px 20px 32px;
}

.site-main {
    position: relative;
    z-index: 1;
}

.top-bar {
    position: fixed;
    top: 0;
    left: 20px;
    right: 20px;
    z-index: 1200;
    padding-top: var(--adsterra-horizontal-top-offset);
    border-radius: 0 0 22px 22px;
    backdrop-filter: blur(14px);
    background: rgba(255, 249, 255, 0.86);
    border-bottom: 1px solid rgba(141, 111, 177, 0.3);
    box-shadow: 0 10px 30px rgba(89, 66, 131, 0.14);
}

.top-bar-inner {
    width: 100%;
    max-width: none;
}

body.app-layout {
    padding-top: calc(152px + var(--adsterra-horizontal-top-offset));
}

.intro-grid {
    width: 100%;
    max-width: 930px;
    margin: 0 auto;
}

.top-bar-title,
.section-title,
.card-title,
.lobby-header h2,
.rooms-page h1,
.registration-modal .modal-content h2 {
    font-family: "Sora", "Plus Jakarta Sans", "Segoe UI", sans-serif;
    color: #3b2d4e;
}

.top-bar-title {
    text-transform: none;
    letter-spacing: 0.2px;
    text-shadow: none;
}

.main-nav .nav-link {
    color: #4f3f64;
    background: rgba(139, 112, 171, 0.1);
    border: 1px solid rgba(139, 112, 171, 0.2);
    box-shadow: 0 2px 6px rgba(90, 70, 123, 0.08);
}

.main-nav .nav-link:hover,
.main-nav .nav-link.active {
    color: #fff;
    background: linear-gradient(140deg, #7d5ab1, #654694);
    border-color: rgba(125, 90, 177, 0.65);
    box-shadow: 0 6px 18px rgba(101, 70, 148, 0.3);
}

.container,
.content-block,
.content-card,
.room-section,
.create-room-card,
.lobby-section,
.rooms-list-wrapper,
.faq-item,
.registration-modal .modal-content {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--line-soft);
    border-radius: 22px;
    box-shadow: var(--shadow-soft);
}

.content-card {
    animation: m3RiseIn 0.42s ease;
}

.section-description,
.lead-text,
.content-list,
.faq-item p,
.support-form small,
.status-label,
.current-player,
.score,
.spectators-info,
.rooms-updated-at {
    color: var(--text-muted);
}

.room-share,
.game-status-bar,
.players-section,
.game-info,
.room-header,
.tutorial-box {
    border: 1px solid #e4d9f1;
    border-radius: 16px;
    background: #faf5ff;
}

.tutorial-box {
    border-style: solid;
}

.help-icon-btn {
    border: 1px solid #cfbedf;
    background: #f7efff;
    color: #5a427d;
}

.help-icon-btn:hover {
    filter: brightness(0.98);
}

.room-badge {
    background: #6f4ea0;
    color: #fff;
}

.player-slot {
    border: 1px solid #ebdff7;
    border-radius: 12px;
    box-shadow: none;
}

.primary-cta,
.secondary-button,
.danger-button,
.primary-link-button,
#createRoom,
.room-actions-inline button,
#newGame,
.registration-buttons button {
    border-radius: 16px;
}

.primary-cta,
#createRoom,
#newGame,
.room-actions-inline .join-player,
.primary-link-button,
#registerPlayer {
    background: linear-gradient(140deg, #8263b4, #69499c);
    color: #fff;
    box-shadow: 0 10px 18px rgba(103, 72, 149, 0.26);
}

.secondary-button,
.room-actions-inline .join-spectator,
#joinAsSpectator {
    background: #efe7fa;
    color: #4d3c64;
    border: 1px solid #d6c8e8;
}

.danger-button {
    background: linear-gradient(140deg, #cc6280, #b84e6d);
    color: #fff;
    box-shadow: 0 10px 18px rgba(173, 73, 106, 0.24);
}

.primary-cta:hover,
.secondary-button:hover,
.danger-button:hover,
.primary-link-button:hover,
#createRoom:hover,
.room-actions-inline button:hover,
#newGame:hover,
.registration-buttons button:hover {
    filter: brightness(1.02);
}

.game-status.waiting {
    background: #f6e7c3;
    color: #7e5f12;
}

.game-status.playing {
    background: #daf0de;
    color: #1f6a33;
}

.game-status.finished {
    background: #f6d9e2;
    color: #8d2947;
}

.player-info.red {
    background: #f6d9e2;
    color: #8d2947;
}

.player-info.black {
    background: #dcd3eb;
    color: #2f2342;
}

.player-info.spectator {
    background: #e9e2f5;
    color: #4d3b62;
}

#gameCanvas {
    border: 3px solid #7557a5;
    border-radius: 18px;
    box-shadow: 0 16px 30px rgba(86, 65, 122, 0.25);
    background: #fff;
}

.board-preview-image {
    border: 1px solid #e0d4ef;
    border-radius: 16px;
    background: #fff;
}

.support-form input,
.support-form select,
.support-form textarea,
.password-group input,
.room-code-select,
.registration-form input[type="text"] {
    border: 1px solid #d7cae7;
    border-radius: 14px;
    background: #fff;
}

.support-form input:focus,
.support-form select:focus,
.support-form textarea:focus,
.password-group input:focus,
.room-code-select:focus,
.registration-form input[type="text"]:focus {
    outline: none;
    border-color: #7d5cb0;
    box-shadow: 0 0 0 4px rgba(125, 92, 176, 0.18);
}

.rooms-table th {
    background: #efe6f9;
    color: #4f3f64;
}

.rooms-table th,
.rooms-table td {
    border-bottom: 1px solid #eadff4;
}

.room-code-link {
    color: #68479a;
}

.room-code-link:hover {
    color: #553983;
}

.privacy-badge.public {
    background: #6f4ea0;
}

.privacy-badge.private {
    background: #c55372;
}

.registration-modal {
    background: rgba(52, 37, 75, 0.45);
    backdrop-filter: blur(4px);
}

.registration-modal .modal-content {
    max-width: 460px;
}

.notification {
    border-radius: 14px;
    box-shadow: 0 16px 26px rgba(67, 45, 100, 0.24);
}

@keyframes m3RiseIn {
    from {
        opacity: 0;
        transform: translateY(10px) scale(0.99);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@media (max-width: 768px) {
    body:not(.app-layout) {
        padding-top: 22px;
    }

    body.app-layout {
        padding-top: calc(160px + var(--adsterra-horizontal-top-offset));
    }

    .top-bar {
        left: 14px;
        right: 14px;
        border-radius: 0 0 18px 18px;
    }

    .container,
    .content-block,
    .content-card,
    .room-section,
    .lobby-section {
        border-radius: 18px;
    }

    #gameCanvas {
        border-radius: 14px;
    }
}

.rooms-page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 14px;
    flex-wrap: wrap;
}

.rooms-page-header h1 {
    margin: 0;
}

.language-switcher {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #e5e7eb;
    font-size: 0.82rem;
}

.language-switcher label {
    font-weight: 700;
    letter-spacing: 0.2px;
}

.language-switcher select {
    min-width: 168px;
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: 8px;
    background: rgba(13, 29, 53, 0.75);
    color: #f8fafc;
    padding: 7px 10px;
    font-size: 0.84rem;
}

.language-switcher select:focus-visible {
    outline: 2px solid #ffffff;
    outline-offset: 1px;
}

.top-bar .language-switcher {
    color: #4f3f64;
}

.top-bar .language-switcher select {
    border-color: #cebde0;
    background: #f8f3ff;
    color: #3f2f54;
}

.main-nav .nav-language-switcher {
    margin-left: 4px;
    padding-left: 6px;
    border-left: 1px solid rgba(125, 90, 177, 0.28);
}

.main-nav .nav-language-switcher select {
    min-width: 134px;
    padding: 6px 9px;
}

.rooms-language-switcher {
    color: var(--text-main);
}

.rooms-language-switcher select {
    border-color: #d1d5db;
    background: #ffffff;
    color: #1f2937;
}

.adsterra-horizontal-slot {
    width: var(--adsterra-horizontal-slot-width);
    min-height: var(--adsterra-horizontal-slot-height);
    --adsterra-horizontal-scale: 1;
    transform: scale(var(--adsterra-horizontal-scale));
    transform-origin: top center;
    will-change: transform;
}

.adsterra-horizontal-rail {
    width: 100%;
    display: flex;
    justify-content: center;
}

.adsterra-horizontal-rail-top {
    position: fixed;
    top: max(6px, env(safe-area-inset-top));
    left: 0;
    z-index: 1250;
    padding-inline: 8px;
}

.adsterra-horizontal-rail-inline {
    position: relative;
    z-index: 1;
    margin: 0 auto 14px;
    padding-inline: 8px;
}

.adsterra-slot {
    width: 160px;
    min-height: 600px;
}

.adsterra-side-rail {
    position: fixed;
    z-index: 900;
    top: calc(170px + var(--adsterra-horizontal-top-offset));
    --adsterra-rail-scale: 1;
    transform: scale(var(--adsterra-rail-scale));
    will-change: transform;
}

.adsterra-side-rail-left {
    left: calc(50% - 640px);
    transform-origin: top left;
}

.adsterra-side-rail-right {
    left: calc(50% + 480px);
    transform-origin: top left;
}

body:not(.app-layout) .adsterra-side-rail {
    top: 106px;
}

@media (max-width: 1320px) {
    .adsterra-side-rail {
        display: block;
        --adsterra-rail-scale: clamp(0.56, 100vw / 1100, 0.82);
    }

    .adsterra-side-rail-left {
        left: 6px;
    }

    .adsterra-side-rail-right {
        left: auto;
        right: 6px;
        transform-origin: top right;
    }
}

@media (max-width: 768px) {
    .language-switcher {
        width: 100%;
        justify-content: center;
    }

    .main-nav .nav-language-switcher {
        width: auto;
        border-left: none;
        padding-left: 0;
        margin-left: 0;
    }

    .main-nav .nav-language-switcher label {
        display: none;
    }

    .main-nav .nav-language-switcher select {
        min-width: 120px;
    }

    .rooms-page-header {
        align-items: flex-start;
    }

    .rooms-language-switcher {
        justify-content: flex-start;
    }

    .adsterra-horizontal-slot {
        --adsterra-horizontal-scale: clamp(0.82, calc((100vw - 16px) / 320px), 1);
    }

    .adsterra-side-rails-stack {
        display: flex;
        justify-content: center;
        align-items: flex-start;
        gap: 0;
        width: calc(100% + 28px);
        margin: 14px 0 0 -14px;
        overflow-x: auto;
        overflow-y: hidden;
        -webkit-overflow-scrolling: touch;
    }

    .adsterra-side-rail {
        position: static;
        top: auto;
        left: auto;
        right: auto;
        flex: 0 0 auto;
        display: flex;
        justify-content: center;
        width: auto;
        margin: 0;
        transform: none;
        z-index: 1;
    }

    .adsterra-side-rail-left,
    .adsterra-side-rail-right {
        transform-origin: top center;
    }
}