/**
 * Go Game - Modern UI Styles
 * ダークモードベースのモダンなデザインシステム
 */

/* ===== CSS Variables ===== */
:root {
    /* Colors - Dark Theme */
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --bg-card: rgba(26, 26, 46, 0.8);
    
    /* Text Colors */
    --text-primary: #f0f0f0;
    --text-secondary: #a0a0b0;
    --text-muted: #6a6a7a;

    
    /* Accent Colors */
    --accent-gold: #f0c040;
    --accent-gold-light: #ffd866;
    --accent-blue: #4a9eff;
    --accent-green: #4ade80;
    --accent-red: #f87171;

    --accent-blue-light: #4a9effb2;
    --accent-green-light: #4ade80b2;
    --accent-red-light: #f87171b2;
    
    /* Stone Colors */
    --stone-black: #1a1a1a;
    --stone-white: #f5f5f5;
    
    /* Effects */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 20px rgba(240, 192, 64, 0.3);
    
    /* Layout */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;
    
    /* Font */
    --font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-tertiary) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 30%, rgba(74, 158, 255, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(240, 192, 64, 0.06) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* ===== Loading Screen ===== */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-tertiary) 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-content {
    text-align: center;
}

.loading-stones {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.loading-stone {
    font-size: 2.5rem;
    animation: loadingBounce 1.2s ease-in-out infinite;
}

.loading-stone.black {
    animation-delay: 0s;
}

.loading-stone.white {
    animation-delay: 0.6s;
}

@keyframes loadingBounce {
    0%, 100% {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
    50% {
        transform: translateY(-15px) scale(1.1);
        opacity: 0.7;
    }
}

.loading-text {
    color: var(--text-secondary);
    font-size: 1rem;
    letter-spacing: 0.1em;
    animation: loadingPulse 1.5s ease-in-out infinite;
}

@keyframes loadingPulse {
    0%, 100% {
        opacity: 0.5;
    }
    50% {
        opacity: 1;
    }
}

/* ===== App Layout ===== */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== Header ===== */
.app-header {
    text-align: center;
    padding: 2rem 1rem;
    background: var(--glass-bg);
    border-bottom: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
}

.app-title {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.title-icon {
    font-size: 1.5rem;
    animation: pulse 2s ease-in-out infinite;
}

.title-icon.white {
    animation-delay: 1s;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.app-subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.25rem;
    letter-spacing: 0.2em;
}

/* ===== Main Game Container ===== */
.game-container {
    flex: 1;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: flex-start;
    gap: 2rem;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* ===== Board Section ===== */
.board-section {
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 320px;
    max-width: 600px;
    gap: .6rem;
}

/* Mode Tabs Wrapper (above board) */
.mode-tabs-wrapper {
    width: 100%;
}

.board-wrapper {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 1rem;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
    width: 100%;
    aspect-ratio: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: box-shadow var(--transition-normal);
}

.board-wrapper:hover {
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

#board-canvas {
    border-radius: var(--radius-md);
    cursor: pointer;
    width: 100%;
    height: 100%;
}

/* ===== Controls Section ===== */
.controls-section {
    flex: 0 0 500px;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Settings Panel */
.settings-panel {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 1rem;
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.setting-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.setting-select {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.setting-select:hover {
    border-color: var(--accent-gold);
}

.setting-select:focus {
    outline: none;
    border-color: var(--accent-gold);
    box-shadow: 0 0 0 2px rgba(240, 192, 64, 0.2);
}

/* Game Controls Panel */
.game-controls-panel {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    backdrop-filter: blur(10px);
}

/* Game Info */
.game-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--glass-border);
}

.turn-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.turn-stone {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast);
}

.turn-stone.black {
    background: radial-gradient(circle at 30% 30%, #555, #111);
}

.turn-stone.white {
    background: radial-gradient(circle at 30% 30%, #fff, #ccc);
}

.turn-stone.pulse {
    animation: stonePulse 0.6s ease-out;
}

@keyframes stonePulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

.turn-text {
    font-weight: 500;
    color: var(--text-primary);
}

/* Captures Display */
.captures-display {
    display: flex;
    gap: 1rem;
}

.capture-count {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.capture-stone {
    width: 16px;
    height: 16px;
    border-radius: 50%;
}

.capture-stone.black {
    background: radial-gradient(circle at 30% 30%, #444, #111);
}

.capture-stone.white {
    background: radial-gradient(circle at 30% 30%, #fff, #bbb);
}

.capture-value {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}

/* Move Count */
.move-count {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

#move-count-value {
    color: var(--accent-gold);
    font-weight: 600;
}

/* ===== History Navigation (Below Board) ===== */
.history-navigation-container {
    width: 100%;
}

.history-navigation {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    background: linear-gradient(135deg, rgba(26, 26, 46, 0.95), rgba(22, 33, 62, 0.9));
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
    box-shadow: 
        0 4px 20px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(12px);
}

.history-nav-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    background: linear-gradient(145deg, rgba(30, 30, 50, 0.8), rgba(20, 20, 40, 0.9));
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.history-nav-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 50%, rgba(240, 192, 64, 0.15), transparent 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.history-nav-btn svg {
    width: 20px;
    height: 20px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    z-index: 1;
}

.history-nav-btn:hover:not(:disabled) {
    background: linear-gradient(145deg, rgba(50, 50, 80, 0.9), rgba(30, 30, 60, 0.95));
    border-color: var(--accent-gold);
    box-shadow: 
        0 0 20px rgba(240, 192, 64, 0.25),
        0 4px 12px rgba(0, 0, 0, 0.3);
}

.history-nav-btn:hover:not(:disabled)::before {
    opacity: 1;
}

.history-nav-btn:hover:not(:disabled) svg {
    transform: scale(1.15);
    color: var(--accent-gold);
}

.history-nav-btn:active:not(:disabled) {
    transform: translateY(0) scale(0.96);
    box-shadow: 
        0 0 12px rgba(240, 192, 64, 0.2),
        0 2px 6px rgba(0, 0, 0, 0.3);
}

.history-nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    background: rgba(20, 20, 40, 0.5);
}

/* ===== Mobile Game Controls (Below History Navigation) ===== */
.mobile-game-controls {
    display: none;  /* デスクトップでは非表示 */
    width: 100%;
    gap: 0.5rem;
    padding: 0 15px;
}

.mobile-game-controls .control-btn {
    width:5.9rem;
    padding: 0.6rem 0.5rem;
    font-size: 0.85rem;
    border: 1px solid var(--glass-border);
}
#mobile-pass-btn{
    border-color: var(--accent-blue-light);
}
#mobile-resign-btn{
    border-color: var(--accent-red-light);
}
#mobile-new-game-btn{
    border-color: var(--accent-green-light);
}

.mobile-game-controls .btn-icon {
    font-size: 0.9rem;
}

/* ===== Mobile Scoring Controls (Below History Navigation) ===== */
.mobile-scoring-controls {
    display: none;  /* デスクトップでは非表示 */
    width: 100%;
    gap: 0.5rem;
    padding: 0 15px;
    flex-direction: column;
    align-items: center;
}

.mobile-scoring-instruction {
    width: 100%;
    text-align: center;
    color: var(--accent-gold);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.6rem;
    background: rgba(240, 192, 64, 0.15);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(240, 192, 64, 0.3);
}

/* モバイル用スコアプレビュー */
.mobile-score-preview {
    display: flex;
    flex-direction: column;
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-sm);
    border: 1px solid var(--glass-border);
    overflow: hidden;
}

.mobile-score-summary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 0.75rem;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.mobile-score-summary:hover {
    background: rgba(255, 255, 255, 0.05);
}

.mobile-score-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.mobile-score-label {
    font-weight: 600;
    font-size: 0.9rem;
}

.mobile-score-value {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-gold);
}

.mobile-score-vs {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.mobile-score-expand-icon {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-left: 0.25rem;
    transition: transform var(--transition-fast);
}

.mobile-score-preview.expanded .mobile-score-expand-icon {
    transform: rotate(180deg);
}

/* アコーディオン詳細部分 */
.mobile-score-details {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease-out, padding 0.25s ease-out;
    padding: 0 0.75rem;
    background: rgba(0, 0, 0, 0.15);
    border-top: 1px solid transparent;
}

.mobile-score-preview.expanded .mobile-score-details {
    max-height: 100px;
    padding: 0.6rem 0.75rem;
    border-top-color: var(--glass-border);
}

.mobile-score-detail-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.25rem 0;
    font-size: 0.85rem;
}

.detail-label {
    font-weight: 600;
    min-width: 1.5rem;
}

.detail-breakdown {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

/* モバイル用終局ボタン */
.mobile-scoring-buttons {
    display: flex;
    gap: 0.5rem;
    width: 100%;
    max-width: 400px;
}

.mobile-scoring-buttons .control-btn {
    flex: 1;
    padding: 0.75rem 0.5rem;
    font-size: 0.9rem;
}

#mobile-confirm-score-btn {
    border-color: var(--accent-green-light);
    background: rgba(74, 222, 128, 0.1);
}

#mobile-confirm-score-btn:hover {
    background: rgba(74, 222, 128, 0.2);
    border-color: var(--accent-green);
}

#mobile-cancel-scoring-btn {
    border-color: var(--accent-blue-light);
}

/* Control Buttons */
.control-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.control-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.control-btn:hover:not(:disabled) {
    background: var(--bg-tertiary);
    border-color: var(--accent-gold);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.control-btn:active:not(:disabled) {
    transform: translateY(0);
}

.control-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-icon {
    font-size: 1.1rem;
}

.pass-btn:hover:not(:disabled) {
    border-color: var(--accent-blue);
}

.resign-btn:hover:not(:disabled) {
    border-color: var(--accent-red);
}

.new-game-btn:hover:not(:disabled) {
    border-color: var(--accent-green);
}

/* Game Status */
.game-status {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    text-align: center;
    font-weight: 500;
    opacity: 0;
    transform: translateY(-10px);
    transition: all var(--transition-normal);
}

.game-status.show {
    opacity: 1;
    transform: translateY(0);
}

.game-status.info {
    background: rgba(74, 158, 255, 0.15);
    color: var(--accent-blue);
    border: 1px solid rgba(74, 158, 255, 0.3);
}

.game-status.warning {
    background: rgba(240, 192, 64, 0.15);
    color: var(--accent-gold);
    border: 1px solid rgba(240, 192, 64, 0.3);
}

.game-status.success {
    background: rgba(74, 222, 128, 0.15);
    color: var(--accent-green);
    border: 1px solid rgba(74, 222, 128, 0.3);
}

.game-status.error {
    background: rgba(248, 113, 113, 0.15);
    color: var(--accent-red);
    border: 1px solid rgba(248, 113, 113, 0.3);
}

/* Rules Hint */
.rules-hint {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 1rem;
    backdrop-filter: blur(10px);
}

.hint-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hint-list {
    list-style: none;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.hint-list li {
    padding: 0.25rem 0;
    padding-left: 1rem;
    position: relative;
}

.hint-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent-gold);
}

/* ===== Footer ===== */
.app-footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--glass-border);
    background: var(--glass-bg);
}

@media (max-width: 1196px) {
    /* スマホではモバイル用コントロールを表示、サイドパネルのボタンは非表示 */
    .mobile-game-controls {
        display: flex;
        justify-content: center;
    }
    
    .control-buttons {
        display: none;
    }
    
    /* 終局処理モード時のモバイル表示切替 */
    .mobile-game-controls.scoring-mode {
        display: none;
    }
    
    .mobile-scoring-controls.scoring-mode {
        display: flex;
    }
    
    /* サイドパネルの終局UI（モバイルでは常に非表示） */
    .scoring-buttons,
    .score-preview {
        display: none !important;
    }
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .game-container {
        padding: 1rem;
        gap: 1.5rem;
    }
    
    .board-section {
        max-width: 100%;
    }
    
    .controls-section {
        flex: 0 0 auto;
        width: 100%;
    }
    
    .app-title {
        font-size: 2rem;
    }
    
    .control-buttons {
        flex-direction: row;
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .app-header {
        padding: 1.5rem 1rem;
    }
    
    .app-title {
        font-size: 1.75rem;
    }
    
    .game-info {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .captures-display {
        width: 100%;
        justify-content: center;
    }
    
    .history-navigation {
        gap: 0.5rem;
    }
    
    .history-nav-btn {
        width: 36px;
        height: 36px;
        border-radius: 10px;
    }
    
    .history-nav-btn svg {
        width: 18px;
        height: 18px;
    }
    

}

/* ===== Animations ===== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { 
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.board-wrapper {
    animation: fadeIn 0.5s ease-out;
}

.game-controls-panel {
    animation: slideUp 0.5s ease-out 0.1s both;
}

.settings-panel {
    animation: slideUp 0.5s ease-out 0.2s both;
}

.rules-hint {
    animation: slideUp 0.5s ease-out 0.3s both;
}

/* ===== Scoring Mode ===== */
.hidden {
    display: none !important;
}

/* Scoring Buttons */
.scoring-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.scoring-instruction {
    text-align: center;
    color: var(--accent-gold);
    font-size: 0.9rem;
    padding: 0.5rem;
    background: rgba(240, 192, 64, 0.1);
    border-radius: var(--radius-sm);
    margin-bottom: 0.5rem;
}

.confirm-btn:hover:not(:disabled) {
    border-color: var(--accent-green);
    background: rgba(74, 222, 128, 0.1);
}

.cancel-btn:hover:not(:disabled) {
    border-color: var(--accent-blue);
}

/* Score Preview */
.score-preview {
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-sm);
    border: 1px solid var(--glass-border);
}

.score-title {
    text-align: center;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.score-details {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.score-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    gap: 0.5rem;
}

.score-row.black {
    background: rgba(0, 0, 0, 0.3);
}

.score-row.white {
    background: rgba(255, 255, 255, 0.1);
}

.score-label {
    font-weight: 600;
    min-width: 30px;
}

.score-breakdown {
    font-size: 0.75rem;
    color: var(--text-muted);
    flex: 1;
}

.score-total {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent-gold);
}

/* Final Result */
.final-result {
    margin-top: 1rem;
    padding: 1.25rem;
    background: linear-gradient(135deg, rgba(240, 192, 64, 0.15) 0%, rgba(74, 222, 128, 0.1) 100%);
    border: 2px solid var(--accent-gold);
    border-radius: var(--radius-md);
    text-align: center;
    opacity: 0;
    transform: scale(0.95);
    transition: all var(--transition-normal);
}

.final-result.show {
    opacity: 1;
    transform: scale(1);
}

.result-winner {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-gold);
    margin-bottom: 1rem;
}

.result-scores {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.result-score {
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
}

.result-score.black {
    background: rgba(0, 0, 0, 0.3);
}

.result-score.white {
    background: rgba(255, 255, 255, 0.1);
}

.result-score small {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 400;
    margin-top: 0.25rem;
}

/* Scoring Mode Responsive */
@media (max-width: 480px) {
    .score-breakdown {
        display: none;
    }
    
    .scoring-buttons .control-btn {
        flex: 1;
    }
}

/* ===== Toast Notifications ===== */
.toast-container {
    position: fixed;
    top: 1rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    pointer-events: none;
    max-width: 90vw;
}

.toast {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 0.75rem 1.25rem;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg);
    pointer-events: auto;
    animation: toastSlideIn 0.3s ease-out;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.toast.hiding {
    animation: toastSlideOut 0.3s ease-in forwards;
}

.toast.info {
    border-color: rgba(74, 158, 255, 0.5);
    background: linear-gradient(135deg, rgba(74, 158, 255, 0.15) 0%, var(--bg-secondary) 100%);
}

.toast.info .toast-icon {
    color: var(--accent-blue);
}

.toast.warning {
    border-color: rgba(240, 192, 64, 0.5);
    background: linear-gradient(135deg, rgba(240, 192, 64, 0.15) 0%, var(--bg-secondary) 100%);
}

.toast.warning .toast-icon {
    color: var(--accent-gold);
}

.toast.success {
    border-color: rgba(74, 222, 128, 0.5);
    background: linear-gradient(135deg, rgba(74, 222, 128, 0.15) 0%, var(--bg-secondary) 100%);
}

.toast.success .toast-icon {
    color: var(--accent-green);
}

.toast.error {
    border-color: rgba(248, 113, 113, 0.5);
    background: linear-gradient(135deg, rgba(248, 113, 113, 0.15) 0%, var(--bg-secondary) 100%);
}

.toast.error .toast-icon {
    color: var(--accent-red);
}

.toast-icon {
    font-size: 1.1rem;
}

.toast-message {
    color: var(--text-primary);
}

@keyframes toastSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes toastSlideOut {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-20px);
    }
}

/* ===== Result Modal ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10001;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.modal-overlay.hidden {
    display: none;
}

.result-modal {
    background: linear-gradient(145deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border: 2px solid var(--accent-gold);
    border-radius: var(--radius-lg);
    padding: 2rem;
    max-width: 400px;
    width: 90%;
    box-shadow: 
        var(--shadow-lg),
        0 0 40px rgba(240, 192, 64, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    transform: scale(0.9);
    transition: transform var(--transition-normal);
}

.modal-overlay.show .result-modal {
    transform: scale(1);
}

.modal-content {
    text-align: center;
}

.modal-winner {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent-gold);
    margin-bottom: 1.5rem;
    text-shadow: 0 2px 10px rgba(240, 192, 64, 0.3);
}

.modal-winner::before {
    content: '🏆';
    display: block;
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.modal-scores {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.modal-score-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    gap: 0.5rem;
}

.modal-score-row.black {
    background: rgba(0, 0, 0, 0.4);
}

.modal-score-row.white {
    background: rgba(255, 255, 255, 0.1);
}

.modal-score-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
}

.modal-score-stone {
    width: 18px;
    height: 18px;
    border-radius: 50%;
}

.modal-score-stone.black {
    background: radial-gradient(circle at 30% 30%, #444, #111);
}

.modal-score-stone.white {
    background: radial-gradient(circle at 30% 30%, #fff, #bbb);
}

.modal-score-right {
    text-align: right;
}

.modal-score-value {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent-gold);
}

.modal-score-detail {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* Share Section */
.share-section {
    margin-bottom: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--glass-border);
}

.share-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.share-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.share-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.share-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.twitter-btn {
    background: #000;
    color: #fff;
    border: 1px solid #fff;
}

.twitter-btn:hover {
    background: #1a1a1a;
}

.line-btn {
    background: #06C755;
    color: #fff;
}

.line-btn:hover {
    background: #05b34c;
}

/* Modal New Game Button */
.modal-new-game-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--accent-green);
    border-radius: var(--radius-md);
    background: rgba(74, 222, 128, 0.1);
    color: var(--accent-green);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-new-game-btn:hover {
    background: rgba(74, 222, 128, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(74, 222, 128, 0.3);
}

.modal-new-game-btn:active {
    transform: translateY(0);
}

/* Modal Responsive */
@media (max-width: 480px) {
    .result-modal {
        padding: 1.5rem;
    }
    
    .modal-winner {
        font-size: 1.5rem;
    }
    
    .modal-winner::before {
        font-size: 2rem;
    }
    
    .share-buttons {
        flex-direction: column;
    }
    
    .share-btn {
        justify-content: center;
    }
}

/* ===== AI Mode Styles ===== */

/* ===== Mode Tabs ===== */
.mode-tabs {
    display: flex;
    gap: 0.5rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 0.375rem;
    backdrop-filter: blur(10px);
}

.mode-tab {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1rem;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    border-radius: var(--radius-sm);
    position: relative;
    z-index: 1;
}

.mode-tab .tab-icon {
    width: 18px;
    height: 18px;
    transition: all var(--transition-normal);
}

.mode-tab:hover:not(.active) {
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.03);
}

.mode-tab:hover:not(.active) .tab-icon {
    transform: scale(1.1);
}

.mode-tab.active {
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 
        0 2px 8px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.mode-tab.active .tab-icon {
    color: var(--accent-gold);
    filter: drop-shadow(0 0 4px rgba(240, 192, 64, 0.4));
}

.mode-tab:focus {
    outline: none;
}

.mode-tab:focus-visible {
    box-shadow: 0 0 0 2px var(--accent-gold);
}



/* ===== Setting Row ===== */
.setting-row {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.03) 0%, rgba(255, 255, 255, 0.01) 100%);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-sm);
    padding: 0.875rem;
    transition: all var(--transition-normal);
}

.setting-row:hover {
    border-color: rgba(255, 255, 255, 0.1);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);
}

.setting-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.setting-label-text {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    white-space: nowrap;
}

.setting-icon {
    width: 16px;
    height: 16px;
    color: var(--accent-gold);
    opacity: 0.8;
}

/* Enhanced Select Styling */
.setting-select {
    flex: 1;
    max-width: 140px;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    padding: 0.5rem 0.75rem;
    font-family: inherit;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23a0a0b0' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2rem;
}

.setting-select:hover {
    border-color: var(--accent-gold);
    box-shadow: 0 0 10px rgba(240, 192, 64, 0.15);
}

.setting-select:focus {
    outline: none;
    border-color: var(--accent-gold);
    box-shadow: 0 0 0 2px rgba(240, 192, 64, 0.2);
}

/* AI Settings Container (shown/hidden based on mode) */
#ai-settings {
    animation: fadeIn 0.3s ease;
}

#ai-settings.hidden {
    display: none;
}

/* AI Thinking Animation */
.turn-text.thinking {
    color: var(--text-primary);
}

.turn-stone.thinking {
    animation: thinkingSpin 2s linear infinite;
}



@keyframes thinkingSpin {
    0% { 
        transform: rotate(0deg);
        box-shadow: 0 0 0 rgba(240, 192, 64, 0);
    }
    50% { 
        box-shadow: 0 0 15px rgba(240, 192, 64, 0.5);
    }
    100% { 
        transform: rotate(360deg);
        box-shadow: 0 0 0 rgba(240, 192, 64, 0);
    }
}

/* ===== AI Thinking Indicator (Board Overlay) ===== */
.ai-thinking-indicator {
    position: absolute;
    top: -9px;
    left: 50%;
    transform: translateX(-50%) translateY(50%);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.75rem;
    background: rgba(20, 20, 30, 0.9);
    border: 1px solid rgba(240, 192, 64, 0.3);
    border-radius: var(--radius-sm);
    backdrop-filter: blur(8px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
    z-index: 100;
    pointer-events: none;
}

.ai-thinking-indicator.visible {
    opacity: 1;
    visibility: visible;
}

.thinking-dots {
    display: flex;
    gap: 3px;
}

.thinking-dot {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--accent-gold);
    animation: thinkingDotPulse 1.2s ease-in-out infinite;
}

.thinking-dot:nth-child(1) {
    animation-delay: 0s;
}

.thinking-dot:nth-child(2) {
    animation-delay: 0.15s;
}

.thinking-dot:nth-child(3) {
    animation-delay: 0.3s;
}

@keyframes thinkingDotPulse {
    0%, 100% {
        opacity: 0.3;
    }
    50% {
        opacity: 1;
    }
}

.thinking-label {
    font-size: .85rem;
    font-weight: 500;
    color: var(--text-primary);
    letter-spacing: 0.02em;
}

/* Board border effect when AI is thinking - subtle and smart */
.board-wrapper.ai-thinking {
    border-color: rgba(240, 192, 64, 0.4);
}

/* モバイル対応 */
@media (max-width: 768px) {
    .ai-thinking-indicator {
        padding: 0.3rem 0.6rem;
        gap: 0.3rem;
    }
    
    .thinking-dot {
        width: 3px;
        height: 3px;
    }
    
    .thinking-label {
        font-size: 0.65rem;
    }
}

/* AI Mode Indicator */
.turn-text::after {
    content: '';
}

/* Responsive Settings */
@media (max-width: 480px) {
    .mode-tabs {
        padding: 0.2rem;
    }
    
    .mode-tab {
        padding: 0.75rem 0.5rem;
        font-size: 0.8rem;
        gap: 0.35rem;
    }
    
    .mode-tab .tab-icon {
        width: 16px;
        height: 16px;
    }
    
    .mode-tab span {
        display: inline;
    }
    
    .tab-content {
        padding: 0.75rem;
        gap: 0.5rem;
    }
    
    .setting-row {
        padding: 0.75rem;
    }
    
    .setting-item {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }
    
    .setting-select {
        max-width: 100%;
        width: 100%;
    }
}