/* リセットとベーススタイル */
* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

:root {
	--primary-color: #ff0000;
	--primary-hover: #cc0000;
	--secondary-color: #606060;
	--secondary-hover: #404040;
	--background-color: #f9f9f9;
	--card-background: #ffffff;
	--text-primary: #212121;
	--text-secondary: #606060;
	--border-color: #e0e0e0;
	--success-color: #27ae60;
	--error-color: #e74c3c;
	--shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

body {
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
		"Helvetica Neue", Arial, sans-serif;
	background-color: var(--background-color);
	color: var(--text-primary);
	line-height: 1.6;
}

/* コンテナ */
.container {
	max-width: 800px;
	margin: 0 auto;
	padding: 20px;
	min-height: 100vh;
	display: flex;
	flex-direction: column;
}

/* ヘッダー */
header {
	text-align: center;
	margin-bottom: 40px;
}

h1 {
	font-size: 2.5rem;
	font-weight: 700;
	margin-bottom: 10px;
	color: var(--primary-color);
}

.tagline {
	font-size: 1.1rem;
	color: var(--text-secondary);
}

/* カード */
.card {
	background: var(--card-background);
	border-radius: 8px;
	padding: 30px;
	box-shadow: var(--shadow);
	margin-bottom: 20px;
}

.card h2 {
	font-size: 1.5rem;
	margin-bottom: 20px;
	color: var(--text-primary);
}

/* フォーム */
.form-group {
	margin-bottom: 20px;
}

label {
	display: block;
	font-weight: 600;
	margin-bottom: 8px;
	color: var(--text-primary);
}

input[type="url"],
input[type="text"] {
	width: 100%;
	padding: 12px;
	border: 1px solid var(--border-color);
	border-radius: 4px;
	font-size: 16px;
	transition: border-color 0.3s;
}

input[type="url"]:focus,
input[type="text"]:focus {
	outline: none;
	border-color: var(--primary-color);
}

.help-text {
	display: block;
	margin-top: 5px;
	font-size: 0.85rem;
	color: var(--text-secondary);
}

/* ボタン */
.btn {
	padding: 12px 24px;
	border: none;
	border-radius: 4px;
	font-size: 16px;
	font-weight: 600;
	cursor: pointer;
	transition: all 0.3s;
	width: 100%;
}

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

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

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

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

.btn-danger {
	background-color: var(--error-color);
	color: white;
	width: auto;
	padding: 8px 16px;
}

.btn-danger:hover {
	background-color: #c0392b;
}

/* 区切り線 */
.divider {
	text-align: center;
	margin: 30px 0;
	color: var(--text-secondary);
	position: relative;
}

.divider::before,
.divider::after {
	content: "";
	position: absolute;
	top: 50%;
	width: 45%;
	height: 1px;
	background-color: var(--border-color);
}

.divider::before {
	left: 0;
}

.divider::after {
	right: 0;
}

/* フッター */
footer {
	margin-top: auto;
	text-align: center;
	padding: 20px 0;
	color: var(--text-secondary);
	font-size: 0.9rem;
}

/* トースト通知 */
.toast {
	position: fixed;
	bottom: 20px;
	left: 50%;
	transform: translateX(-50%) translateY(100px);
	background-color: var(--text-primary);
	color: white;
	padding: 12px 24px;
	border-radius: 4px;
	opacity: 0;
	transition: all 0.3s;
	z-index: 1000;
}

.toast.show {
	transform: translateX(-50%) translateY(0);
	opacity: 1;
}

.error-toast {
	background-color: var(--error-color);
}

.success-toast {
	background-color: var(--success-color);
}

/* ルームページのスタイル */
.room-container {
	min-height: 100vh;
	display: flex;
	flex-direction: column;
}

.room-header {
	background-color: var(--card-background);
	padding: 15px 30px;
	box-shadow: var(--shadow);
	display: flex;
	justify-content: space-between;
	align-items: center;
}

.room-info h1 {
	font-size: 1.5rem;
	margin-bottom: 5px;
}

.room-id-container {
	display: flex;
	align-items: center;
	gap: 10px;
}

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

.room-id {
	font-family: monospace;
	font-size: 1.1rem;
	font-weight: 600;
	color: var(--primary-color);
}

.btn-copy {
	background: none;
	border: 1px solid var(--border-color);
	padding: 4px 8px;
	border-radius: 4px;
	cursor: pointer;
	transition: all 0.3s;
	color: var(--text-secondary);
}

.btn-copy:hover {
	background-color: var(--background-color);
	color: var(--text-primary);
}

/* メインコンテンツエリア */
.room-main {
	flex: 1;
	display: flex;
	gap: 20px;
	padding: 20px;
	max-width: 1400px;
	margin: 0 auto;
	width: 100%;
}

.video-section {
	flex: 1;
	display: flex;
	flex-direction: column;
}

.player-container {
	position: relative;
	padding-bottom: 56.25%; /* 16:9 アスペクト比 */
	background-color: #000;
	border-radius: 8px;
	overflow: hidden;
	box-shadow: var(--shadow);
}

#player {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
}

.video-controls {
	margin-top: 15px;
	text-align: center;
}

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

#syncStatus {
	font-weight: 600;
}

/* 参加者セクション */
.participants-section {
	width: 250px;
	background-color: var(--card-background);
	border-radius: 8px;
	padding: 20px;
	box-shadow: var(--shadow);
}

.participants-section h2 {
	font-size: 1.2rem;
	margin-bottom: 15px;
	padding-bottom: 10px;
	border-bottom: 1px solid var(--border-color);
}

.participants-list {
	list-style: none;
	margin-bottom: 15px;
}

.participant {
	padding: 8px 0;
	display: flex;
	justify-content: space-between;
	align-items: center;
}

.participant-name {
	color: var(--text-primary);
}

.participant-host {
	background-color: var(--primary-color);
	color: white;
	font-size: 0.75rem;
	padding: 2px 8px;
	border-radius: 12px;
}

.participants-count {
	text-align: center;
	color: var(--text-secondary);
	font-size: 0.9rem;
	padding-top: 10px;
	border-top: 1px solid var(--border-color);
}

/* プレイリストセクション */
.playlist-section {
	margin-top: 20px;
	background-color: var(--card-background);
	border-radius: 8px;
	padding: 20px;
	box-shadow: var(--shadow);
}

.playlist-header {
	display: flex;
	justify-content: space-between;
	align-items: center;
	margin-bottom: 15px;
}

.playlist-header h3 {
	font-size: 1.2rem;
	margin: 0;
}

.btn-sm {
	padding: 6px 12px;
	font-size: 0.9rem;
	width: auto;
}

.add-video-form {
	margin-bottom: 15px;
	padding: 15px;
	background-color: var(--background-color);
	border-radius: 4px;
}

.video-url-input {
	width: 100%;
	padding: 8px;
	margin-bottom: 10px;
	border: 1px solid var(--border-color);
	border-radius: 4px;
	font-size: 14px;
}

.add-video-actions {
	display: flex;
	gap: 10px;
	justify-content: flex-end;
}

.playlist-container {
	max-height: 300px;
	overflow-y: auto;
	margin-bottom: 15px;
}

.empty-playlist {
	text-align: center;
	color: var(--text-secondary);
	padding: 20px;
	font-size: 0.9rem;
}

.playlist-item {
	display: flex;
	gap: 10px;
	padding: 10px;
	border: 1px solid var(--border-color);
	border-radius: 4px;
	margin-bottom: 8px;
	cursor: pointer;
	transition: all 0.3s;
}

.playlist-item:hover {
	background-color: var(--background-color);
	border-color: var(--primary-color);
}

.playlist-item.active {
	background-color: var(--primary-color);
	color: white;
	border-color: var(--primary-color);
}

.playlist-item.active .video-title,
.playlist-item.active .video-meta {
	color: white;
}

.video-thumbnail {
	width: 80px;
	height: 45px;
	object-fit: cover;
	border-radius: 4px;
}

.video-info {
	flex: 1;
	display: flex;
	flex-direction: column;
	justify-content: center;
}

.video-title {
	font-size: 0.9rem;
	font-weight: 600;
	color: var(--text-primary);
	margin-bottom: 2px;
	overflow: hidden;
	text-overflow: ellipsis;
	white-space: nowrap;
}

.video-meta {
	font-size: 0.75rem;
	color: var(--text-secondary);
}

.playlist-controls {
	display: flex;
	gap: 10px;
	justify-content: center;
}

.room-description {
	color: var(--text-secondary);
	margin-bottom: 20px;
	text-align: center;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
	h1 {
		font-size: 2rem;
	}

	.container {
		padding: 15px;
	}

	.card {
		padding: 20px;
	}

	.room-header {
		flex-direction: column;
		gap: 15px;
		text-align: center;
	}

	.room-main {
		flex-direction: column;
	}

	.participants-section {
		width: 100%;
		order: -1;
		margin-bottom: 20px;
	}

	.btn-danger {
		width: 100%;
	}
}

@media (max-width: 480px) {
	h1 {
		font-size: 1.5rem;
	}

	.room-info h1 {
		font-size: 1.2rem;
	}

	.room-id {
		font-size: 0.9rem;
	}
}