/* 炎上シミュレーター CSS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Hiragino Sans', sans-serif;
    background: #000000;
    color: #e7e9ea;
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

.main-layout {
    display: flex;
    min-height: 100vh;
    max-width: 1200px;
    margin: 0 auto;
}

.sidebar {
    width: 275px;
    background: #000000;
    border-right: 1px solid #2f3336;
    padding: 1rem;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-logo {
    font-size: 1.8rem;
    font-weight: 900;
    margin-bottom: 2rem;
    padding-left: 0.75rem;
}

.sidebar-nav {
    list-style: none;
}

.sidebar-nav li {
    margin-bottom: 0.5rem;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    padding: 0.75rem;
    border-radius: 25px;
    color: #e7e9ea;
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 400;
    transition: background-color 0.2s ease;
}

.sidebar-nav a:hover {
    background: #1d1f23;
}

.sidebar-nav .icon {
    width: 24px;
    margin-right: 1rem;
    text-align: center;
    position: relative;
    display: inline-block;
}

.notification-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background: #f91880;
    color: white;
    border-radius: 50%;
    min-width: 18px;
    height: 18px;
    font-size: 0.7rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid #000000;
    animation: pulse-notification 2s infinite;
}

.notification-badge.hidden {
    display: none;
}

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

.container {
    width: 600px;
    margin-left: 275px;
    min-height: 100vh;
    border-right: 1px solid #2f3336;
    background: #000000;
}


/* ヘッダー */
.header {
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(12px);
    padding: 1rem;
    border-bottom: 1px solid #2f3336;
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-nav-mobile {
    display: none;
    position: absolute;
    top: 1rem;
    left: 1rem;
    z-index: 10;
}

.home-button-mobile {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(29, 161, 242, 0.1);
    color: #1da1f2;
    text-decoration: none;
    border-radius: 20px;
    font-weight: 500;
    font-size: 0.85rem;
    transition: all 0.3s ease;
    border: 1px solid rgba(29, 161, 242, 0.2);
}

.home-button-mobile:hover {
    background: rgba(29, 161, 242, 0.2);
    transform: translateY(-1px);
}

.home-icon {
    font-size: 1rem;
}

.header-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
}

.header h1 {
    font-size: 1.25rem;
    font-weight: 800;
    margin: 0;
}

.disclaimer {
    font-size: 0.75rem;
    color: #71767b;
    margin-top: 0.25rem;
}

.home-button {
    background: #1d9bf0;
    color: white;
    text-decoration: none;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
}

.home-button:hover {
    background: #1a8cd8;
}

/* 炎上度メーター */
.flame-meter {
    display: none;
}

/* 投稿エリア */
.post-area {
    background: #000000;
    padding: 1rem;
    border-bottom: 1px solid #2f3336;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, #1d9bf0, #8b5cf6);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.username {
    font-weight: 700;
    font-size: 0.95rem;
}

.handle {
    color: #71767b;
    font-size: 0.9rem;
}

#postInput {
    width: 100%;
    background: transparent;
    border: none;
    color: #e7e9ea;
    font-size: 1.25rem;
    resize: vertical;
    min-height: 80px;
    padding: 1rem 0;
    outline: none;
    font-family: inherit;
}

#postInput::placeholder {
    color: #71767b;
    font-size: 1.25rem;
}

.post-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1rem;
}

.post-button {
    background: #1d9bf0;
    color: white;
    border: none;
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.post-button:hover:not(:disabled) {
    background: #1a8cd8;
}

.post-button:disabled {
    background: #2f3336;
    cursor: not-allowed;
    opacity: 0.5;
}

.reset-button {
    background: transparent;
    color: #71767b;
    border: 1px solid #2f3336;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    transition: all 0.2s ease;
}

.reset-button:hover {
    background: #0f1419;
    border-color: #71767b;
    color: #e7e9ea;
}

/* 対応選択肢 */
.response-options {
    background: #991b1b;
    padding: 1rem;
    border-bottom: 1px solid #2f3336;
    animation: pulse 2s infinite;
    border-top: 3px solid #dc2626;
}

.response-options h3 {
    margin-bottom: 1rem;
    text-align: center;
    color: #fecaca;
    font-weight: 700;
    font-size: 1rem;
}

.options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0.75rem;
}

.option-button {
    background: rgba(255, 255, 255, 0.1);
    color: #fecaca;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 0.75rem;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.85rem;
    font-weight: 600;
}

.option-button:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.4);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

/* タイムライン */
.timeline {
    background: #000000;
}

.tweet {
    background: #000000;
    border-bottom: 1px solid #2f3336;
    padding: 1rem;
    animation: slideIn 0.4s ease;
    transition: background-color 0.2s ease;
}

.tweet:hover {
    background: #080808;
}

.tweet.user-tweet {
    background: #0a0a0a;
}

.tweet.user-tweet:hover {
    background: #0f0f0f;
}

.tweet.news-tweet {
    background: #1a0f0a;
    border-left: 4px solid #f91880;
}

.tweet.trending {
    background: #0f0a0a;
    border-left: 4px solid #ff0000;
}

.tweet.promo-tweet {
    background: #0a0f1a;
    border-left: 4px solid #1d9bf0;
}

.tweet.media-tweet {
    background: #1a0a1a;
    border-left: 4px solid #8b5cf6;
}

.tweet-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.tweet-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tweet-avatar-img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.tweet-user {
    flex: 1;
}

.tweet-username {
    font-weight: bold;
}

.tweet-handle {
    color: #8899a6;
    font-size: 0.9rem;
}

.tweet-time {
    color: #8899a6;
    font-size: 0.8rem;
}

.tweet-content {
    margin-bottom: 0.75rem;
    line-height: 1.5;
}

.tweet-content a {
    color: #1d9bf0;
    text-decoration: none;
    transition: color 0.2s ease;
}

.tweet-content a:hover {
    color: #1a8cd8;
    text-decoration: underline;
}

.tweet-actions {
    display: flex;
    gap: 2rem;
    color: #8899a6;
    font-size: 0.9rem;
}

.tweet-action {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.quote-tweet {
    border: 1px solid #38444d;
    border-radius: 15px;
    padding: 0.75rem;
    margin-top: 0.75rem;
    background: rgba(255, 255, 255, 0.02);
}

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

/* 警告メッセージ */
.warning {
    background: #2d1b20;
    padding: 1rem;
    text-align: center;
    font-size: 0.8rem;
    color: #ffcc99;
    border-top: 1px solid #38444d;
}

/* レスポンシブ */
@media (max-width: 1225px) {
    .main-layout {
        max-width: 875px;
    }
}

@media (max-width: 875px) {
    .sidebar {
        width: 80px;
    }
    
    .sidebar-nav a {
        padding: 0.75rem;
        justify-content: center;
    }
    
    .sidebar-nav .icon {
        margin-right: 0;
    }
    
    .sidebar-nav a span:not(.icon) {
        display: none;
    }
    
    .home-button {
        font-size: 0.7rem;
        padding: 0.3rem 0.5rem;
    }
    
    .container {
        margin-left: 80px;
    }
    
}

@media (max-width: 600px) {
    .sidebar {
        position: relative;
        width: 100%;
        height: auto;
        padding: 0.5rem;
        border-right: none;
        border-bottom: 1px solid #2f3336;
    }
    
    .sidebar-nav {
        display: flex;
        justify-content: space-around;
        margin-bottom: 0;
    }
    
    .sidebar-nav li {
        margin-bottom: 0;
        flex: 1;
    }
    
    .sidebar-nav a {
        padding: 0.5rem;
        font-size: 0.9rem;
        text-align: center;
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .sidebar-nav .icon {
        margin-right: 0;
        font-size: 1.1rem;
    }
    
    .sidebar-nav a span:not(.icon) {
        font-size: 0.7rem;
    }
    
    .sidebar-logo {
        display: none;
    }
    
    .home-button {
        display: none;
    }
    
    .header-nav-mobile {
        display: block;
    }
    
    .home-button-mobile .home-text {
        display: none;
    }
    
    .container {
        margin-left: 0;
        width: 100%;
    }
    
    .main-layout {
        max-width: 100%;
        flex-direction: column;
    }
    
    .options {
        grid-template-columns: 1fr;
    }
    
    .post-actions {
        flex-direction: column;
        gap: 0.5rem;
    }
}