/* Sort Algorithm Visualization Styles */

/* Google Fonts - Inter: モダンで読みやすいフォント */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    /* 背景色 */
    --bg-main: #181d1a;
    --bg-card: #242a27;
    --bg-panel: transparent;
    --bg-hover: #2d3530;
    --bg-button: rgba(250, 189, 47, 0.2);
    /* テキスト色 */
    --text-primary: #ffffff;
    --text-secondary: #b8c1d0;
    --text-disabled: #6b7280;
    --text-accent: #7fa86f;
    /* アクセントカラー */
    --color-accent: #7fa86f;
    --color-accent-hover: #91bd7e;
    --color-accent-soft: rgba(127, 168, 111, 0.15);
    --color-accent-dark: #5a7a5a;
    --color-accent-darker: #6d9460;
    /* 再生コントロール */
    --color-play: #3b82f6;
    --color-pause: #a855f7;
    --color-stop: #e53e3e;
    --color-sound-on: #fabd2f;
    --color-sound-off: #6b7280;
    --color-sound-border: rgba(250, 189, 47, 0.5)
    /* ソート可視化 */
    --color-normal: #3b82f6;
    --color-read: #fbbf24;
    --color-write: #f97316;
    --color-compare: #a855f7;
    --color-swap: #ef4444;
    --color-sorted: #10b981;
    --color-buffer: #6b7280;
    /* ボーダー */
    --border-color: #374151;
    --border-color-light: #4b5563;
    --border-color-focus: #7fa86f;
    /* 状態 */
    --color-success: #10b981;
    --color-warning: #fbbf24;
    --color-error: #ef4444;
    --color-info: #3b82f6;
    /* チュートリアル専用 */
    --color-tutorial-bg-start: rgba(69, 133, 136, 0.15);
    --color-tutorial-bg-end: rgba(104, 157, 106, 0.15);
    --color-tutorial-accent: #8ec07c;
    --color-tutorial-text: #bdae93;
    /* レイアウト */
    --page-max-width: 1920px;
    /* 廃止される旧カラー変数（後方互換性のため一時的に保持） */
    --bg-dark: var(--bg-main);
    --text-light: var(--text-primary);
    --text-gray: var(--text-secondary);
}

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

html, body {
    /* モダンで読みやすいフォントスタック:
       1. Inter - モダンな欧文フォント (Google Fonts)
       2. -apple-system/BlinkMacSystemFont - macOS/iOS のシステムフォント
       3. 'Noto Sans JP' - 日本語用の読みやすいフォント
       4. 'Segoe UI' - Windows のシステムフォント
       5. 'Hiragino Sans' - macOS の日本語フォント
       6. 'Yu Gothic UI' - Windows の日本語フォント
       7. sans-serif - フォールバック */
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Noto Sans JP', 'Segoe UI', 'Hiragino Sans', 'Yu Gothic UI', sans-serif;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background-color: var(--bg-main);
    color: var(--text-primary);
    height: 100%;
    overflow: hidden;
}

#app {
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.header {
    grid-column: 1 / -1;
    padding: 12px 8px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    position: relative;
}

.header__actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.header__icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-hover);
    color: var(--text-secondary);
    text-decoration: none;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1.25rem;
    transition: all 0.2s ease;
    cursor: pointer;
    flex-shrink: 0;
    padding: 0;
}

    .header__icon-btn:hover {
        background: var(--color-accent-dark);
        color: var(--text-primary);
        border-color: var(--color-accent);
        transform: translateY(-1px);
    }

    .header__icon-btn svg {
        display: block;
        width: 24px;
        height: 24px;
    }

/* =============================================
   共有コンポーネントスタイル (QuickAccessPanel + TutorialPage)
   ============================================= */

/* 各コントロールアイテム */
.qap__item {
    margin-bottom: 10px;
    padding: 8px 10px;
    background-color: var(--bg-card);
    border-radius: 4px;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
}

    .qap__item .stat-label {
        font-size: 0.72rem;
        font-weight: 700;
        letter-spacing: 0.07em;
        text-transform: uppercase;
        color: var(--text-secondary);
    }

.qap__item--vertical input[type="range"] {
    width: 100%;
    margin-top: 4px;
    transition: background 0.1s linear;
}

.qap__slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
}

.qap__slider-value {
    font-size: 0.85rem;
    font-weight: bold;
    color: var(--text-primary);
}

/* カードグループ（QuickAccessPanel / TutorialPage ツールバーで共通利用） */
.ui-card {
    background-color: #2a2a2a;
    border-radius: 6px;
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.ui-card__title {
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    padding-bottom: 6px;
    margin-bottom: 2px;
    border-bottom: 1px solid var(--border-color);
}

/* トグルボタンとして機能するタイトル（タブレット・スマホで有効化） */
.ui-card__title--toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    background: none;
    border: none;
    border-bottom: 1px solid var(--border-color);
    padding: 0 0 6px 0;
    margin-bottom: 2px;
    cursor: default;
    text-align: left;
}

/* 折りたたみアイコン（シェブロン ∨） */
.ui-card__toggle-icon {
    display: none;
    width: 14px;
    height: 14px;
    color: var(--text-secondary);
    transition: transform 0.2s ease, color 0.15s;
    flex-shrink: 0;
}

    .ui-card__toggle-icon svg {
        width: 100%;
        height: 100%;
        display: block;
    }

.ui-card__toggle-icon--collapsed {
    transform: rotate(-90deg);
}

/* カード本体（コンテンツラッパー） */
.ui-card__body {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

/* カード内アイテムはカードがコンテナなので背景・角丸・外マージン不要 */
.ui-card .qap__item {
    margin-bottom: 0;
    padding: 2px 0;
    background: transparent;
    border-radius: 0;
}

/* タブレット・スマホのみ折りたたみ有効 */
@media (max-width: 1279px) {
    .ui-card__toggle-icon {
        display: block;
    }

    .ui-card__title--toggle {
        cursor: pointer;
        transition: background-color 0.15s, color 0.15s;
    }

        /* ホバー: テキスト色を明るく、シェブロンをアクセントカラーに */
        .ui-card__title--toggle:hover {
            color: var(--text-primary);
        }

        .ui-card__title--toggle:hover .ui-card__toggle-icon {
            color: var(--color-accent);
        }

        /* タップ時のフラッシュフィードバック */
        .ui-card__title--toggle:active {
            background-color: rgba(255, 255, 255, 0.06);
        }

    /* 折りたたみ状態: シェブロンをアクセントカラーで常時表示して「開けること」をアピール */
    .ui-card--collapsed .ui-card__toggle-icon {
        color: var(--color-accent);
    }

    /* 折りたたみ時: border-bottom を除去してコンパクトなタブに見せる */
    .ui-card--collapsed {
        padding-bottom: 6px;
    }

    .ui-card--collapsed .ui-card__title--toggle {
        border-bottom: none;
        padding-bottom: 0;
        margin-bottom: 0;
    }

    .ui-card__body--collapsed {
        display: none;
    }
}


/* =============================================
   タブレット (768px〜1279px): スクロール有効化
   html/body/#app はコンポーネントスコープ外のため app.css で制御
   ============================================= */
@media (min-width: 768px) and (max-width: 1279px) {
    /* TutorialPage + Index（タブレットは全ページスクロール可能） */
    html, body {
        height: auto;
        min-height: 100%;
        overflow: auto;
    }

    #app {
        height: auto;
        min-height: 100vh;
    }
}

/* =============================================
   スマホ (〜767px)
   ============================================= */
@media (max-width: 767px) {
    /* スクロールを有効化 */
    html, body {
        height: auto;
        min-height: 100%;
        overflow: auto;
    }

    #app {
        height: auto;
        min-height: 100vh;
    }

    .header__actions {
        gap: 6px;
    }
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.stat-value {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--text-primary);
}

button {
    padding: 10px 20px;
    background-color: var(--bg-hover);
    color: var(--text-primary);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.2s;
}

    button:hover {
        background-color: #3d4757;
    }

    button:active {
        background-color: var(--bg-panel);
    }

    button.primary {
        background: linear-gradient(135deg, #5a9a4d 0%, #3d7a38 100%);
        color: #fff;
    }

        button.primary:hover {
            background: linear-gradient(135deg, #6bb05d 0%, #4a8c43 100%);
        }

select {
    padding: 10px 14px;
    background-color: var(--bg-hover);
    color: var(--text-primary);
    border: 1px solid var(--border-color-light);
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    transition: border-color 0.2s;
}

    select:focus {
        outline: none;
        border-color: var(--border-color-focus);
    }

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background-color: #4A4A4A;
    outline: none;
}

    input[type="range"]::-webkit-slider-thumb {
        -webkit-appearance: none;
        appearance: none;
        width: 18px;
        height: 18px;
        border-radius: 50%;
        background-color: var(--color-accent);
        cursor: pointer;
        box-shadow: 0 2px 4px rgba(0,0,0,0.3);
    }

    input[type="range"]::-moz-range-thumb {
        width: 18px;
        height: 18px;
        border-radius: 50%;
        background-color: var(--color-accent);
        cursor: pointer;
        border: none;
        box-shadow: 0 2px 4px rgba(0,0,0,0.3);
    }

    input[type="range"]::-moz-range-progress {
        background-color: var(--color-accent);
        border-radius: 3px;
        height: 6px;
    }

    input[type="range"]::-moz-range-track {
        background-color: #4A4A4A;
        border-radius: 3px;
        height: 6px;
    }

#blazor-error-ui {
    background: lightyellow;
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
}

    #blazor-error-ui .dismiss {
        cursor: pointer;
        position: absolute;
        right: 0.75rem;
        top: 0.5rem;
    }

/* ── Loading screen ── */
.loading-screen {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    background: #181d1a;
    z-index: 9999;
}

.loading-screen.fade-out {
    animation: loading-fade-out 0.4s ease-out forwards;
    pointer-events: none;
}

@keyframes loading-fade-out {
    0%   { opacity: 1; }
    100% { opacity: 0; }
}

/* Animated sorting bars */
.loading-bars {
    display: flex;
    align-items: flex-end;
    gap: 4px;
    height: 120px;
    padding: 0 1rem;
}

.loading-bar {
    width: 10px;
    border-radius: 3px 3px 0 0;
    animation: bar-sort 2.8s cubic-bezier(.4,0,.2,1) infinite;
    animation-delay: calc(var(--i) * 0.12s);
}

@keyframes bar-sort {
    0%   { height: var(--h); background: #3b82f6; }
    15%  { background: #a855f7; transform: translateY(-8px); }
    30%  { height: calc(100% - (100% - var(--h))); background: #fbbf24; }
    50%  { height: calc(var(--i) * 6% + 8%); background: #ef4444; transform: translateY(0); }
    70%  { background: #10b981; }
    85%  { height: calc(var(--i) * 5.5% + 5%); background: #10b981; }
    100% { height: var(--h); background: #3b82f6; }
}

/* Title */
.loading-title {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 1.6rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    color: #ffffff;
    text-shadow: 0 0 30px rgba(127,168,111,0.35);
    animation: title-pulse 2.4s ease-in-out infinite;
}

@keyframes title-pulse {
    0%, 100% { opacity: 0.8; text-shadow: 0 0 30px rgba(127,168,111,0.25); }
    50%      { opacity: 1;   text-shadow: 0 0 40px rgba(127,168,111,0.5); }
}

/* Progress track */
.loading-progress-track {
    width: min(260px, 70vw);
    height: 4px;
    background: #374151;
    border-radius: 2px;
    overflow: hidden;
}

.loading-progress-fill {
    height: 100%;
    width: calc(var(--blazor-load-percentage, 0%) * 1);
    background: linear-gradient(90deg, #7fa86f 0%, #10b981 40%, #a8e6a3 60%, #10b981 80%, #7fa86f 100%);
    background-size: 200% 100%;
    border-radius: 2px;
    transition: width 0.15s ease-out;
    box-shadow: 0 0 8px rgba(127,168,111,0.5);
    animation: progress-shimmer 1.8s linear infinite;
}

@keyframes progress-shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Percentage text */
.loading-progress-text {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 0.85rem;
    font-weight: 500;
    color: #b8c1d0;
    letter-spacing: 0.05em;
}


h1:focus {
    outline: none;
}

a, .btn-link {
    color: #0071c1;
}

.btn-primary {
    color: #fff;
    background-color: #1b6ec2;
    border-color: #1861ac;
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
    box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

.content {
    padding-top: 1.1rem;
}

.valid.modified:not([type=checkbox]) {
    outline: 1px solid #26b050;
}

.invalid {
    outline: 1px solid red;
}

.validation-message {
    color: red;
}

#blazor-error-ui {
    color-scheme: light only;
    background: lightyellow;
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
    box-sizing: border-box;
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
}

    #blazor-error-ui .dismiss {
        cursor: pointer;
        position: absolute;
        right: 0.75rem;
        top: 0.5rem;
    }

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, #b32121;
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
}

    .blazor-error-boundary::after {
        content: "An error has occurred."
    }

/* Second loading-progress block removed — replaced by .loading-screen above */

    .loading-progress-text:after {
        content: var(--blazor-load-percentage-text, "Loading");
    }

code {
    color: #c02d76;
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
    text-align: start;
}

/* ローディングオーバーレイ */
.loading-overlay {
    position: absolute;
    inset: 0;
    z-index: 100;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    color: #e5e7eb;
    font-size: 1rem;
    border-radius: 8px;
    pointer-events: all;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(59, 130, 246, 0.3);
    border-top-color: #3B82F6;
    border-radius: 50%;
    animation: loading-spin 0.8s linear infinite;
}

@keyframes loading-spin {
    to {
        transform: rotate(360deg);
    }
}

/* fieldset リセット（サイドバーコントロール一括無効化用） */
fieldset.controls-fieldset {
    border: none;
    padding: 0;
    margin: 0;
    min-inline-size: unset;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

    fieldset.controls-fieldset:disabled *,
    fieldset.controls-fieldset[disabled] * {
        cursor: not-allowed;
    }