/* =================================================================
   U-WMS - Universal Web Multiplayer Game System
   Main Stylesheet
   ================================================================= */

:root {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #64748b;
    --secondary-hover: #475569;
    --danger-color: #ef4444;
    --danger-hover: #dc2626;
    --success-color: #10b981;
    --success-hover: #059669;
    --warning-color: #f59e0b;
    
    /* ダークモードカラー（デフォルト） */
    --bg-color: #0f172a;
    --bg-secondary: #1e293b;
    --card-bg: #1e293b;
    --card-hover: #334155;
    --text-color: #f1f5f9;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --input-bg: #0f172a;
    --input-border: #475569;
    
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 25px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.3);
    
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-danger: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

/* ライトモード（オプション） */
body.light-mode {
    --bg-color: #f8fafc;
    --bg-secondary: #e2e8f0;
    --card-bg: #ffffff;
    --card-hover: #f1f5f9;
    --text-color: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --input-bg: #ffffff;
    --input-border: #cbd5e1;
    
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.2);
}

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

body {
    font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* スムーズなスクロール */
html {
    scroll-behavior: smooth;
}

/* =================================================================
   画面管理
   ================================================================= */

.screen {
    display: none;
    min-height: 100vh;
    padding: 2rem;
}

.screen.active {
    display: block;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

/* =================================================================
   共通コンポーネント
   ================================================================= */

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

h1 {
    font-size: 2rem;
    color: var(--primary-color);
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

h3 {
    font-size: 1.2rem;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

/* ボタン */
.btn-primary, .btn-secondary, .btn-danger {
    padding: 0.875rem 2rem;
    border: none;
    border-radius: 0.75rem;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.025em;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    position: relative;
    overflow: hidden;
}

.btn-primary::before,
.btn-secondary::before,
.btn-danger::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-primary:hover::before,
.btn-secondary:hover::before,
.btn-danger:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.6);
}

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

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: var(--secondary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(100, 116, 139, 0.4);
}

.btn-danger {
    background: var(--gradient-danger);
    color: white;
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.4);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.6);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

button:disabled:hover {
    transform: none !important;
    box-shadow: none !important;
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: #475569;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: var(--danger-hover);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* フォーム */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--input-bg);
    border: 2px solid var(--input-border);
    border-radius: 0.75rem;
    font-size: 1rem;
    color: var(--text-color);
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    background: var(--card-bg);
}

.form-group input:hover,
.form-group select:hover {
    border-color: var(--primary-color);
}

/* レンジスライダー */
.form-group input[type="range"] {
    width: calc(100% - 60px);
    height: 6px;
    padding: 0;
    margin-right: 10px;
    background: var(--input-border);
    border: none;
    border-radius: 3px;
    outline: none;
    vertical-align: middle;
}

.form-group input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s ease;
}

.form-group input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.2);
}

.form-group input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--primary-color);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s ease;
}

.form-group input[type="range"]::-moz-range-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.2);
}

/* ゲーム設定セクション */
.game-settings {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 1rem;
}

.game-settings h3 {
    color: var(--primary-color);
    font-size: 1rem;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* =================================================================
   ローディング画面
   ================================================================= */

#loading-screen .container {
    text-align: center;
    padding-top: 10rem;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    margin: 2rem auto;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

#loading-message {
    color: var(--text-muted);
}

/* =================================================================
   ログイン画面
   ================================================================= */

#login-screen .container {
    max-width: 400px;
    margin-top: 10rem;
    padding: 2rem;
    background-color: var(--card-bg);
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.login-form {
    margin-top: 2rem;
}

/* =================================================================
   ロビー画面
   ================================================================= */

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

#player-name-display {
    font-weight: 600;
    color: var(--primary-color);
}

.lobby-section {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.create-room-panel,
.room-list-panel {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 1.25rem;
    border: 2px solid var(--border-color);
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.create-room-panel:hover,
.room-list-panel:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.room-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-height: 400px;
    overflow-y: auto;
}

.room-card {
    padding: 1rem;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: border-color 0.2s;
}

.room-card:hover {
    border-color: var(--primary-color);
}

.room-info h3 {
    margin: 0 0 0.25rem 0;
    font-size: 1.1rem;
}

.room-meta {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.game-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--primary-color);
    color: white;
    border-radius: 1rem;
    font-size: 0.8rem;
    font-weight: 600;
}

.empty-message {
    text-align: center;
    color: var(--text-muted);
    padding: 2rem;
}

.stats-section {
    display: flex;
    gap: 2rem;
    justify-content: center;
}

.stat-card {
    background-color: var(--card-bg);
    padding: 1.5rem 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
    text-align: center;
    min-width: 150px;
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* =================================================================
   ルーム画面
   ================================================================= */

.room-header-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.room-layout {
    display: grid;
    grid-template-columns: 250px 1fr 300px;
    gap: 1.5rem;
    height: calc(100vh - 200px);
}

.players-panel,
.chat-panel {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
    overflow-y: auto;
}

.players-list {
    list-style: none;
}

.player-item {
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    background-color: var(--bg-color);
    border-radius: 0.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.player-item.host {
    border: 2px solid var(--primary-color);
}

.player-item.you {
    background-color: #dbeafe;
}

.host-badge {
    background-color: var(--primary-color);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
}

.game-area {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
    overflow-y: auto;
}

.waiting-area {
    text-align: center;
    padding: 4rem 2rem;
}

.waiting-area h2 {
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.chat-messages {
    height: calc(100% - 120px);
    overflow-y: auto;
    margin-bottom: 1rem;
    padding: 0.5rem;
}

.chat-message {
    margin-bottom: 0.75rem;
    padding: 0.5rem;
    background-color: var(--bg-color);
    border-radius: 0.5rem;
}

.chat-message-sender {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

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

.chat-message.system {
    background-color: #fef3c7;
    border-left: 3px solid #f59e0b;
}

.chat-message.system .chat-message-text {
    color: #92400e;
    font-style: italic;
}

.chat-input-area {
    display: flex;
    gap: 0.5rem;
}

.chat-input-area input {
    flex: 1;
}

/* =================================================================
   レスポンシブデザイン
   ================================================================= */

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

    .room-layout {
        grid-template-columns: 1fr;
        height: auto;
    }

    .players-panel,
    .chat-panel {
        max-height: 300px;
    }
}

@media (max-width: 768px) {
    .screen {
        padding: 1rem;
    }

    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .stats-section {
        flex-direction: column;
        gap: 1rem;
    }
}