/* 五目並べ - スタイルシート */

/* リセットと基本スタイル */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    min-height: 100vh;
    color: #fff;
    user-select: none;
}

/* ゲームコンテナ */
.game-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ヘッダー */
.game-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
    margin-bottom: 20px;
    padding: 15px 20px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    position: relative;
    z-index: 100;
}

.game-header h1 {
    font-size: 1.8rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.game-controls {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* ホームリンク */
.home-link {
    color: #fff;
    text-decoration: none;
    font-size: 0.9rem;
    padding: 8px 15px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    transition: all 0.2s ease;
}

.home-link:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* ボタン */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

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

.btn-primary {
    background: linear-gradient(135deg, #4a90d9 0%, #357abd 100%);
    color: white;
}

.btn-secondary {
    background: linear-gradient(135deg, #6c757d 0%, #545b62 100%);
    color: white;
}

.btn-success {
    background: linear-gradient(135deg, #28a745 0%, #1e7e34 100%);
    color: white;
}

.btn-danger {
    background: linear-gradient(135deg, #dc3545 0%, #c82333 100%);
    color: white;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-large {
    padding: 15px 40px;
    font-size: 1.1rem;
}

/* モード選択ドロップダウン */
.mode-dropdown {
    position: relative;
    display: inline-block;
}

.mode-dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 200px;
    background: rgba(30, 30, 50, 0.98);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    z-index: 1000;
    margin-top: 8px;
    padding: 8px 0;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.mode-dropdown-content.show {
    display: block;
}

.dropdown-section {
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.dropdown-section:last-child {
    border-bottom: none;
}

.dropdown-title {
    padding: 8px 16px;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
    font-weight: 600;
}

.dropdown-item {
    display: block;
    width: 100%;
    padding: 10px 16px;
    background: none;
    border: none;
    color: #fff;
    font-size: 0.95rem;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s ease;
}

.dropdown-item:hover {
    background: rgba(255, 255, 255, 0.1);
}

.dropdown-item.active {
    background: rgba(74, 144, 217, 0.3);
    color: #4a90d9;
}

/* ゲーム情報パネル */
.game-info-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    padding: 15px 20px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 12px;
    margin-bottom: 20px;
    backdrop-filter: blur(10px);
}

.player-info {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 15px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.player-info.active {
    background: rgba(255, 215, 0, 0.15);
    box-shadow: 0 0 15px rgba(255, 215, 0, 0.3);
}

.player-icon {
    font-size: 2rem;
}

.player-details {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.player-name {
    font-size: 1rem;
    font-weight: bold;
}

.player-rank {
    font-size: 0.8rem;
    opacity: 0.7;
}

.turn-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: transparent;
    transition: all 0.3s ease;
}

.player-info.active .turn-indicator {
    background: #ffd700;
    box-shadow: 0 0 10px #ffd700;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.2); opacity: 0.7; }
}

.game-status {
    text-align: center;
    flex: 1;
}

.current-turn {
    font-size: 1.3rem;
    font-weight: bold;
    margin-bottom: 5px;
}

.game-mode {
    font-size: 0.85rem;
    opacity: 0.7;
}

/* ボードラッパー */
.board-wrapper {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 10px 0;
}

.board-container {
    position: relative;
}

/* ゲームボード */
.board {
    display: grid;
    background: linear-gradient(145deg, #deb887 0%, #c4a35a 50%, #b8956e 100%);
    border: 4px solid #8b7355;
    border-radius: 8px;
    padding: 15px;
    box-shadow: 
        0 10px 40px rgba(0, 0, 0, 0.5),
        inset 0 2px 4px rgba(255, 255, 255, 0.2),
        inset 0 -2px 4px rgba(0, 0, 0, 0.2);
}

/* 交点（セル） */
.cell {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
    transition: all 0.15s ease;
}

.cell::before {
    content: '';
    position: absolute;
    background: #5c3d2e;
}

/* 横線 */
.cell::before {
    width: 100%;
    height: 2px;
    top: 50%;
    transform: translateY(-50%);
}

/* 縦線 */
.cell::after {
    content: '';
    position: absolute;
    width: 2px;
    height: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: #5c3d2e;
}

/* 端のセル処理 */
.cell.top::after { height: 50%; top: 50%; }
.cell.bottom::after { height: 50%; bottom: 50%; top: auto; }
.cell.left::before { width: 50%; left: 50%; }
.cell.right::before { width: 50%; right: 50%; left: auto; }

/* 星（天元・星） */
.cell.star::before {
    z-index: 1;
}

.cell.star .star-point {
    position: absolute;
    width: 8px;
    height: 8px;
    background: #5c3d2e;
    border-radius: 50%;
    z-index: 2;
}

/* ホバー効果 */
.cell:hover:not(.occupied) .hover-stone {
    opacity: 0.4;
}

.hover-stone {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    position: absolute;
    z-index: 10;
    opacity: 0;
    transition: opacity 0.15s ease;
    pointer-events: none;
}

.hover-stone.black {
    background: radial-gradient(circle at 30% 30%, #555, #000);
}

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

/* 石 */
.stone {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    position: absolute;
    z-index: 10;
    box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.4);
    animation: placeStone 0.2s ease;
}

@keyframes placeStone {
    from {
        transform: scale(0);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.stone.black {
    background: radial-gradient(circle at 30% 30%, #555, #000);
}

.stone.white {
    background: radial-gradient(circle at 30% 30%, #fff, #ccc);
    border: 1px solid #999;
}

/* 最後の手のマーカー */
.stone.last-move::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.stone.black.last-move::after {
    background: #ff6b6b;
}

.stone.white.last-move::after {
    background: #ff6b6b;
}

/* 勝利ライン */
.stone.winning {
    animation: winPulse 0.5s ease infinite alternate;
}

@keyframes winPulse {
    from { transform: scale(1); }
    to { transform: scale(1.1); }
}

/* モーダル */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    backdrop-filter: blur(5px);
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: linear-gradient(145deg, #2a2a4a 0%, #1a1a2e 100%);
    padding: 40px 50px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: modal-appear 0.3s ease;
    max-width: 90vw;
    max-height: 90vh;
    overflow-y: auto;
}

@keyframes modal-appear {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.modal-content h2 {
    font-size: 2rem;
    margin-bottom: 25px;
}

.modal-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 25px;
    flex-wrap: wrap;
}

/* モード選択 */
.mode-options {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.mode-section {
    text-align: left;
    padding: 15px 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
}

.mode-section h3 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    opacity: 0.8;
    text-align: center;
}

.difficulty-options {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.pvp-options {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.mode-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 15px;
    color: #fff;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 120px;
}

.mode-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: #ffd700;
    transform: translateY(-5px);
}

.mode-btn.wide {
    min-width: 250px;
}

.mode-icon {
    font-size: 2rem;
}

.mode-name {
    font-size: 1.1rem;
    font-weight: bold;
}

.mode-desc {
    font-size: 0.8rem;
    opacity: 0.7;
}

/* オンラインロビー */
.online-screen {
    text-align: center;
}

.online-screen.hidden {
    display: none;
}

.online-description {
    margin-bottom: 20px;
    line-height: 1.6;
    opacity: 0.8;
}

.name-input-section {
    margin: 20px 0;
}

.name-input-section label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
}

.name-input-section input {
    width: 100%;
    max-width: 300px;
    padding: 12px 15px;
    font-size: 1rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    text-align: center;
}

.name-input-section input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.name-input-section input:focus {
    outline: none;
    border-color: #4a90d9;
    box-shadow: 0 0 10px rgba(74, 144, 217, 0.3);
}

/* マッチングアニメーション */
.matching-animation {
    padding: 30px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.matching-animation p {
    margin: 15px 0;
}

.waiting-info {
    font-size: 0.9rem;
    opacity: 0.7;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top-color: #4a90d9;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* 結果モーダル */
.result-content {
    min-width: 350px;
}

#result-title {
    font-size: 2.5rem;
}

#result-title.win {
    color: #ffd700;
}

#result-title.lose {
    color: #ff6b6b;
}

#result-title.draw {
    color: #4ecdc4;
}

.result-details {
    margin: 20px 0;
    font-size: 1.2rem;
}

/* 思考中インジケーター */
.thinking-indicator {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    padding: 30px 40px;
    background: rgba(0, 0, 0, 0.9);
    border-radius: 12px;
}

.thinking-indicator.hidden {
    display: none;
}

.thinking-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top-color: #4a90d9;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.thinking-text {
    font-size: 1rem;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .game-container {
        padding: 10px;
    }
    
    .game-header {
        flex-direction: column;
        text-align: center;
        padding: 12px;
    }
    
    .game-header h1 {
        font-size: 1.5rem;
    }
    
    .game-info-panel {
        flex-direction: column;
        gap: 10px;
        padding: 10px;
    }
    
    .player-info {
        width: 100%;
        justify-content: center;
    }
    
    .cell {
        width: 24px;
        height: 24px;
    }
    
    .stone {
        width: 20px;
        height: 20px;
    }
    
    .hover-stone {
        width: 18px;
        height: 18px;
    }
    
    .cell.star .star-point {
        width: 6px;
        height: 6px;
    }
    
    .board {
        padding: 10px;
    }
    
    .btn {
        padding: 8px 15px;
        font-size: 0.9rem;
    }
    
    .modal-content {
        padding: 25px 20px;
    }
    
    .mode-btn {
        min-width: 100px;
        padding: 15px 15px;
    }
}

@media (max-width: 480px) {
    .cell {
        width: 20px;
        height: 20px;
    }
    
    .stone {
        width: 16px;
        height: 16px;
    }
    
    .hover-stone {
        width: 14px;
        height: 14px;
    }
    
    .cell.star .star-point {
        width: 5px;
        height: 5px;
    }
    
    .stone.last-move::after {
        width: 5px;
        height: 5px;
    }
    
    .difficulty-options {
        flex-direction: column;
        align-items: center;
    }
    
    .mode-btn {
        width: 100%;
        max-width: 200px;
    }
}