:root {
    --tr-primary: #46757E;
    --tr-primary-dark: #315961;
    --tr-primary-deep: #23434A;
    --tr-primary-light: #E6EFF0;
    --tr-primary-soft: #F2F7F7;

    --tr-text: #243337;
    --tr-text-muted: #5C6C70;
    --tr-text-placeholder: #78888C;

    --tr-border: #D5E0E2;
    --tr-border-light: #E8EFF0;

    --tr-surface: #FFFFFF;
    --tr-background: #F5F8F8;

    --tr-danger: #9E4343;
    --tr-danger-soft: #FFF1F1;

    --tr-success: #386A57;
    --tr-success-soft: #EDF7F2;

    --tr-shadow: 0 16px 44px rgba(49, 89, 97, 0.12);
    --tr-shadow-small: 0 6px 18px rgba(49, 89, 97, 0.10);

    --tr-radius-xl: 22px;
    --tr-radius-lg: 16px;
    --tr-radius-md: 12px;
    --tr-radius-sm: 8px;
}

/* ========================================
   共通設定
======================================== */

#talk-roulette-app,
#talk-roulette-app * {
    box-sizing: border-box;
}

#talk-roulette-app button,
#talk-roulette-app input {
    font: inherit;
}

#talk-roulette-app button {
    -webkit-tap-highlight-color: transparent;
}

#talk-roulette-app .hidden {
    display: none !important;
}

#talk-roulette-app .visually-hidden {
    position: absolute;

    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;

    overflow: hidden;

    clip: rect(0 0 0 0);
    clip-path: inset(50%);

    white-space: nowrap;

    border: 0;
}

/* ========================================
   全体コンテナ
======================================== */

.roulette-container {
    width: min(calc(100% - 32px), 760px);
    margin: 24px auto;
    padding: 34px;

    color: var(--tr-text);
    background: var(--tr-surface);

    border: 1px solid var(--tr-border-light);
    border-radius: var(--tr-radius-xl);

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

    font-family:
        "Helvetica Neue",
        Arial,
        "Hiragino Kaku Gothic ProN",
        "Hiragino Sans",
        Meiryo,
        sans-serif;
}

/* ========================================
   見出し
======================================== */

.roulette-heading {
    margin-bottom: 20px;
}

.roulette-eyebrow {
    margin: 0 0 7px;

    color: var(--tr-primary);

    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.16em;
}

.roulette-title {
    margin: 0;

    color: var(--tr-primary-deep);

    font-size: clamp(24px, 4vw, 32px);
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: 0.01em;
}

.roulette-description {
    margin: 9px 0 0;

    color: var(--tr-text-muted);

    font-size: 14px;
    line-height: 1.7;
}

/* ========================================
   モード切り替え
======================================== */

.mode-switch {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;

    margin-bottom: 22px;
    padding: 6px;

    background: var(--tr-background);

    border: 1px solid var(--tr-border-light);
    border-radius: var(--tr-radius-lg);
}

.mode-btn {
    display: grid;
    gap: 3px;

    min-width: 0;
    padding: 11px 13px;

    color: var(--tr-text-muted);
    background: transparent;

    border: 1px solid transparent;
    border-radius: var(--tr-radius-md);

    cursor: pointer;

    text-align: left;

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

.mode-btn:hover {
    color: var(--tr-primary-dark);
    background: var(--tr-surface);
}

.mode-btn.active {
    color: var(--tr-primary-deep);
    background: var(--tr-surface);

    border-color: var(--tr-primary);

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

.mode-btn-title {
    font-size: 14px;
    font-weight: 700;
    line-height: 1.4;
}

.mode-btn-note {
    color: var(--tr-text-muted);

    font-size: 11px;
    line-height: 1.5;
}

.mode-btn.active .mode-btn-note {
    color: var(--tr-primary-dark);
}

/* ========================================
   設定パネル（ローカル・ルーム共通の外枠）
======================================== */

.setup-panel {
    margin-bottom: 26px;
    padding: 24px;

    background: var(--tr-primary-soft);

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

.panel-title {
    margin: 0 0 12px;

    color: var(--tr-primary-deep);

    font-size: 17px;
    font-weight: 700;
}

.panel-note {
    margin: 0 0 18px;

    color: var(--tr-text-muted);

    font-size: 12px;
    line-height: 1.7;
}

/* ========================================
   ツールの使い方
======================================== */

.usage-guide {
    margin-bottom: 22px;
    padding: 18px;

    background: var(--tr-surface);

    border: 1px solid var(--tr-border);
    border-radius: var(--tr-radius-md);

    box-shadow: 0 4px 14px rgba(49, 89, 97, 0.06);
}

.usage-guide-heading {
    display: flex;
    align-items: center;
    gap: 9px;

    margin-bottom: 15px;
}

.usage-guide-icon {
    display: inline-flex;
    flex-shrink: 0;
    align-items: center;
    justify-content: center;

    width: 25px;
    height: 25px;

    color: #FFFFFF;
    background: var(--tr-primary);

    border-radius: 50%;

    font-size: 13px;
    font-weight: 800;
}

.usage-guide-title {
    margin: 0;

    color: var(--tr-primary-deep);

    font-size: 15px;
    font-weight: 700;
}

.usage-guide-list {
    display: grid;
    gap: 12px;

    margin: 0;
    padding: 0;

    list-style: none;
}

.usage-guide-item {
    display: grid;
    grid-template-columns: 30px minmax(0, 1fr);
    align-items: flex-start;
    gap: 11px;
}

.usage-guide-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    width: 30px;
    height: 30px;

    color: var(--tr-primary-dark);
    background: var(--tr-primary-light);

    border-radius: 50%;

    font-size: 13px;
    font-weight: 800;
}

.usage-guide-content {
    display: grid;
    gap: 3px;

    min-width: 0;
}

.usage-guide-content strong {
    color: var(--tr-text);

    font-size: 14px;
    font-weight: 700;
    line-height: 1.5;
}

.usage-guide-content span {
    color: var(--tr-text-muted);

    font-size: 12px;
    line-height: 1.65;
}

/* ========================================
   共通メインボタン
======================================== */

.create-room-btn,
.join-room-btn,
.compact-btn,
.start-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    color: #FFFFFF;
    background: var(--tr-primary);

    border: 0;

    cursor: pointer;

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

.create-room-btn {
    width: 100%;
    min-height: 48px;
    padding: 12px 20px;

    border-radius: var(--tr-radius-md);

    box-shadow: var(--tr-shadow-small);

    font-size: 15px;
    font-weight: 700;
}

.create-room-btn:hover,
.join-room-btn:hover,
.compact-btn:hover,
.start-btn:hover {
    background: var(--tr-primary-dark);
    transform: translateY(-1px);
}

.create-room-btn:active,
.join-room-btn:active,
.compact-btn:active,
.start-btn:active {
    transform: translateY(0);
}

.create-room-btn:disabled,
.join-room-btn:disabled,
.compact-btn:disabled,
.start-btn:disabled,
.clear-history-btn:disabled {
    cursor: not-allowed;
    opacity: 0.58;
    transform: none;
}

.create-room-btn:disabled:hover,
.join-room-btn:disabled:hover,
.compact-btn:disabled:hover,
.start-btn:disabled:hover {
    background: var(--tr-primary);
    transform: none;
}

/* ========================================
   区切り線
======================================== */

.entry-divider {
    display: flex;
    align-items: center;
    gap: 12px;

    margin: 20px 0;

    color: var(--tr-text-muted);

    font-size: 12px;
}

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

    flex: 1;

    height: 1px;

    background: var(--tr-border);
}

/* ========================================
   フォーム
======================================== */

.entry-form {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr auto;
    align-items: end;
    gap: 12px;
}

.participant-form {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 12px;
}

.form-field {
    display: grid;
    gap: 7px;

    min-width: 0;
}

.form-label,
.section-label,
.room-meta-label {
    color: var(--tr-text-muted);

    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.035em;
}

.form-input {
    width: 100%;
    min-width: 0;
    min-height: 44px;
    padding: 10px 13px;

    color: var(--tr-text);
    background: var(--tr-surface);

    border: 1px solid var(--tr-border);
    border-radius: var(--tr-radius-sm);

    outline: 0;

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

.form-input::placeholder {
    color: var(--tr-text-placeholder);
    opacity: 1;
}

.form-input:focus {
    border-color: var(--tr-primary);
    box-shadow: 0 0 0 3px rgba(70, 117, 126, 0.20);
}

.room-code-input {
    text-transform: uppercase;

    font-weight: 800;
    letter-spacing: 0.12em;
}

.join-room-btn,
.compact-btn {
    min-height: 44px;
    padding: 10px 17px;

    border-radius: var(--tr-radius-sm);

    font-size: 14px;
    font-weight: 700;
    white-space: nowrap;
}

.compact-btn {
    padding: 10px 22px;
}

/* ========================================
   ステータスメッセージ
======================================== */

.status-message {
    min-height: 1.5em;
    margin: 12px 0 0;
    padding: 0;

    font-size: 13px;
    line-height: 1.5;
}

.status-message:empty {
    min-height: 0;
    margin-top: 0;
}

.status-message.is-error {
    color: var(--tr-danger);
}

.status-message.is-success {
    color: var(--tr-success);
}

.status-message.is-info {
    color: var(--tr-primary-dark);
}

/* ========================================
   ルーム情報
======================================== */

.room-panel-top,
.members-heading,
.room-code-row,
.history-header,
.members-heading-actions {
    display: flex;
    align-items: center;
}

.room-panel-top,
.history-header {
    justify-content: space-between;
    gap: 14px;
}

.members-heading-actions {
    gap: 10px;
}

.room-code-row {
    gap: 9px;
    margin-top: 3px;
}

.current-room-code {
    color: var(--tr-primary-deep);

    font-size: 23px;
    font-weight: 800;
    letter-spacing: 0.14em;

    overflow-wrap: anywhere;
}

/* ========================================
   小さめのボタン
======================================== */

.icon-text-btn,
.leave-room-btn,
.clear-history-btn {
    min-height: 32px;
    padding: 6px 11px;

    color: var(--tr-primary-dark);
    background: var(--tr-surface);

    border: 1px solid var(--tr-border);
    border-radius: 999px;

    cursor: pointer;

    font-size: 12px;
    font-weight: 700;
    white-space: nowrap;

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

.icon-text-btn:hover,
.clear-history-btn:hover {
    background: var(--tr-primary-light);
    border-color: var(--tr-primary);
}

.leave-room-btn {
    color: var(--tr-danger);
}

.leave-room-btn:hover {
    background: var(--tr-danger-soft);
    border-color: #E5BFBF;
}

/* ========================================
   参加者一覧
======================================== */

.members-area {
    margin-top: 20px;
    padding-top: 18px;

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

.members-heading {
    justify-content: space-between;
    gap: 10px;

    margin-bottom: 10px;
}

.member-count {
    flex-shrink: 0;

    color: var(--tr-primary-dark);

    font-size: 12px;
    font-weight: 700;
}

.member-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;

    margin: 0;
    padding: 0;

    list-style: none;
}

.member-item {
    display: inline-flex;
    align-items: center;
    gap: 7px;

    max-width: 100%;
    min-height: 36px;
    padding: 5px 10px 5px 6px;

    color: var(--tr-text);
    background: var(--tr-surface);

    border: 1px solid var(--tr-border-light);
    border-radius: 999px;

    font-size: 13px;
}

.member-empty {
    color: var(--tr-text-muted);

    font-size: 12px;
    line-height: 1.6;
}

.member-avatar {
    display: inline-flex;
    flex-shrink: 0;
    align-items: center;
    justify-content: center;

    width: 25px;
    height: 25px;

    color: #FFFFFF;
    background: var(--tr-primary);

    border-radius: 50%;

    font-size: 11px;
    font-weight: 800;
}

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

    overflow: hidden;

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

.member-me-badge,
.member-host-badge {
    flex-shrink: 0;

    padding: 2px 6px;

    border-radius: 999px;

    font-size: 10px;
    font-weight: 700;
}

.member-me-badge {
    color: var(--tr-primary-dark);
    background: var(--tr-primary-light);
}

.member-host-badge {
    color: var(--tr-success);
    background: var(--tr-success-soft);
}

.member-remove-btn {
    display: inline-flex;
    flex-shrink: 0;
    align-items: center;
    justify-content: center;

    width: 22px;
    height: 22px;
    margin-left: 1px;

    color: var(--tr-text-muted);
    background: transparent;

    border: 0;
    border-radius: 50%;

    cursor: pointer;

    font-size: 15px;
    line-height: 1;

    transition:
        color 0.2s ease,
        background-color 0.2s ease;
}

.member-remove-btn:hover {
    color: var(--tr-danger);
    background: var(--tr-danger-soft);
}

/* ========================================
   ルーレット本体
======================================== */

.roulette-main {
    padding-top: 2px;
}

.category-section {
    margin-bottom: 22px;
}

.section-label {
    margin: 0 0 11px;
}

.category-buttons {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 9px;
}

.category-btn {
    min-width: 0;
    min-height: 42px;
    padding: 9px 11px;

    color: var(--tr-text);
    background: var(--tr-surface);

    border: 1px solid var(--tr-border);
    border-radius: 999px;

    cursor: pointer;

    font-size: 13px;
    font-weight: 700;
    line-height: 1.2;

    overflow-wrap: anywhere;

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

.category-btn:hover {
    color: var(--tr-primary-dark);
    background: var(--tr-primary-soft);

    border-color: var(--tr-primary);

    transform: translateY(-1px);
}

.category-btn:active {
    transform: translateY(0);
}

.category-btn.active {
    color: #FFFFFF;
    background: var(--tr-primary);

    border-color: var(--tr-primary);

    box-shadow: 0 5px 14px rgba(70, 117, 126, 0.23);
}

.category-btn.active:hover {
    color: #FFFFFF;
    background: var(--tr-primary-dark);
}

/* ========================================
   お題表示エリア
======================================== */

.display-area {
    margin-bottom: 15px;
}

.display-window {
    position: relative;

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

    min-height: 190px;
    padding: 28px;

    overflow: hidden;

    background:
        linear-gradient(
            145deg,
            rgba(70, 117, 126, 0.10),
            rgba(255, 255, 255, 0.95)
        );

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

.display-window::before {
    content: "";

    position: absolute;
    top: -80px;
    right: -55px;

    width: 150px;
    height: 150px;

    border: 35px solid rgba(70, 117, 126, 0.06);
    border-radius: 50%;

    pointer-events: none;
}

.roulette-text {
    position: relative;
    z-index: 1;

    width: 100%;

    color: var(--tr-primary-deep);

    font-size: clamp(18px, 3vw, 24px);
    font-weight: 700;
    line-height: 1.65;
    text-align: center;

    overflow-wrap: anywhere;
}

.roulette-text.blur-move {
    animation: slotScroll 0.09s linear infinite;
}

@keyframes slotScroll {
    0% {
        transform: translateY(-38px);
        opacity: 0.25;
        filter: blur(1.4px);
    }

    50% {
        opacity: 0.8;
    }

    100% {
        transform: translateY(38px);
        opacity: 0.25;
        filter: blur(1.4px);
    }
}

/* ========================================
   話す人の表示
======================================== */

.speaker-result {
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: center;
    gap: 12px;

    min-height: 64px;
    margin-bottom: 20px;
    padding: 12px 16px;

    background: var(--tr-background);

    border: 1px solid var(--tr-border-light);
    border-radius: var(--tr-radius-md);

    transition:
        background-color 0.25s ease,
        border-color 0.25s ease,
        transform 0.25s ease;
}

.speaker-result.is-decided {
    background: var(--tr-primary-light);

    border-color: #BFD1D4;

    transform: translateY(-1px);
}

.speaker-label {
    color: var(--tr-text-muted);

    font-size: 12px;
    font-weight: 700;
}

.speaker-name {
    min-width: 0;

    color: var(--tr-primary-deep);

    font-size: clamp(17px, 3vw, 22px);
    font-weight: 800;
    text-align: right;

    overflow-wrap: anywhere;
}

/* ========================================
   STARTボタン
======================================== */

.action-section {
    margin-bottom: 24px;
    text-align: center;
}

.start-btn {
    width: min(100%, 290px);
    min-height: 50px;
    padding: 13px 25px;

    border-radius: 999px;

    box-shadow: 0 8px 22px rgba(70, 117, 126, 0.25);

    font-size: 16px;
    font-weight: 800;
    letter-spacing: 0.09em;
}

/* ========================================
   履歴
======================================== */

.roulette-divider {
    margin: 26px 0 17px;

    border: 0;
    border-top: 1px solid var(--tr-border-light);
}

.toggle-history-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;

    padding: 6px 0;

    color: var(--tr-primary-dark);
    background: transparent;

    border: 0;

    cursor: pointer;

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

.toggle-history-btn .arrow {
    display: inline-block;

    font-size: 9px;

    transition: transform 0.2s ease;
}

.toggle-history-btn.collapsed .arrow {
    transform: rotate(180deg);
}

.history-list {
    max-height: 260px;
    margin: 11px 0 0;
    padding: 7px;

    overflow-y: auto;

    background: var(--tr-background);

    border: 1px solid var(--tr-border-light);
    border-radius: var(--tr-radius-md);

    list-style: none;

    scrollbar-color: var(--tr-border) transparent;
    scrollbar-width: thin;
}

.history-item {
    display: grid;
    gap: 5px;

    padding: 11px 13px;

    color: var(--tr-text-muted);
    background: var(--tr-surface);

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

    font-size: 13px;
    line-height: 1.55;

    overflow-wrap: anywhere;
}

.history-item:first-child {
    border-radius:
        var(--tr-radius-sm)
        var(--tr-radius-sm)
        0
        0;
}

.history-item:last-child {
    border-bottom: 0;

    border-radius:
        0
        0
        var(--tr-radius-sm)
        var(--tr-radius-sm);
}

.history-item:only-child {
    border-radius: var(--tr-radius-sm);
}

.history-theme {
    color: var(--tr-text);
    font-weight: 600;
}

.history-speaker {
    color: var(--tr-primary-dark);

    font-size: 12px;
    font-weight: 700;
}

.history-empty {
    color: var(--tr-text-muted);
    text-align: center;
}

/* ========================================
   キーボード操作時のフォーカス
======================================== */

#talk-roulette-app :focus-visible {
    outline: 3px solid var(--tr-primary);
    outline-offset: 2px;
    border-radius: var(--tr-radius-sm);
}

.start-btn:focus-visible,
.category-btn:focus-visible,
.icon-text-btn:focus-visible,
.leave-room-btn:focus-visible,
.clear-history-btn:focus-visible,
.member-remove-btn:focus-visible {
    border-radius: 999px;
}

/* ========================================
   タブレット対応
======================================== */

@media (max-width: 760px) {
    .roulette-container {
        width: calc(100% - 32px);
        margin: 16px auto;
        padding: 26px;
    }

    .entry-form {
        grid-template-columns: 1fr 1fr;
    }

    .join-room-btn {
        grid-column: 1 / -1;
        width: 100%;
    }

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

    .category-btn[data-category="random"] {
        grid-column: 1 / -1;
    }
}

/* ========================================
   スマートフォン対応
======================================== */

@media (max-width: 480px) {
    .roulette-container {
        width: calc(100% - 16px);
        margin: 8px auto;
        padding: 20px 15px;

        border-radius: 16px;
    }

    .roulette-heading {
        margin-bottom: 18px;
    }

    .roulette-title {
        font-size: 24px;
    }

    .roulette-description {
        font-size: 13px;
    }

    .mode-switch {
        grid-template-columns: 1fr;
        gap: 6px;

        margin-bottom: 18px;
    }

    .mode-btn {
        padding: 10px 12px;
    }

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

    .panel-title {
        margin-bottom: 10px;
        font-size: 16px;
    }

    .usage-guide {
        margin-bottom: 18px;
        padding: 15px;
    }

    .usage-guide-item {
        grid-template-columns: 27px minmax(0, 1fr);
        gap: 9px;
    }

    .usage-guide-number {
        width: 27px;
        height: 27px;

        font-size: 12px;
    }

    .usage-guide-content strong {
        font-size: 13px;
    }

    .usage-guide-content span {
        font-size: 11px;
    }

    .entry-form,
    .participant-form {
        grid-template-columns: 1fr;
    }

    .join-room-btn,
    .compact-btn {
        grid-column: auto;
        width: 100%;
    }

    .room-panel-top {
        align-items: flex-start;
        flex-wrap: wrap;
    }

    .room-code-row {
        flex-wrap: wrap;
    }

    .current-room-code {
        font-size: 20px;
    }

    .members-heading {
        align-items: flex-start;
    }

    .member-name {
        max-width: 120px;
    }

    .category-buttons {
        gap: 8px;
    }

    .category-btn {
        min-height: 42px;
        padding: 9px 8px;

        font-size: 12px;
    }

    .display-window {
        min-height: 170px;
        padding: 22px 16px;

        border-radius: 14px;
    }

    .roulette-text {
        font-size: 18px;
    }

    .speaker-result {
        grid-template-columns: 1fr;
        gap: 5px;

        padding: 12px 14px;
    }

    .speaker-name {
        font-size: 18px;
        text-align: left;
    }

    .start-btn {
        width: 100%;
    }

    .history-header {
        align-items: flex-start;
        flex-wrap: wrap;
    }
}

/* ========================================
   小さいスマートフォン対応
======================================== */

@media (max-width: 360px) {
    .roulette-container {
        width: calc(100% - 12px);
        margin: 6px auto;
        padding: 18px 12px;
    }

    .setup-panel {
        padding: 15px;
    }

    .category-buttons {
        grid-template-columns: 1fr;
    }

    .category-btn[data-category="random"] {
        grid-column: auto;
    }

    .member-item {
        width: 100%;
    }

    .member-name {
        max-width: none;
        flex: 1;
    }

    .icon-text-btn,
    .leave-room-btn,
    .clear-history-btn {
        padding: 6px 9px;
        font-size: 11px;
    }
}

/* ========================================
   アニメーション抑制設定
======================================== */

@media (prefers-reduced-motion: reduce) {
    #talk-roulette-app *,
    #talk-roulette-app *::before,
    #talk-roulette-app *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}