:root {
    --primary-color: #000000;
    --secondary-color: #666666;
    --accent-color: #0095f6;
    --danger-color: #ed4956;
    --success-color: #43b581;
    --warning-color: #faa61a;
    --bg-color: #ffffff;
    --bg-secondary: #f8f9fa;
    --border-color: #dbdbdb;
    --text-primary: #262626;
    --text-secondary: #8e8e8e;
    --shadow: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.15);
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 30px;
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

header h1 {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.main-nav {
    display: flex;
    gap: 20px;
}

.main-nav a {
    text-decoration: none;
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.main-nav a:hover {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.main-nav a.active {
    background-color: var(--primary-color);
    color: white;
}

.dashboard {
    display: grid;
    gap: 30px;
}

.welcome-section {
    background-color: var(--bg-color);
    padding: 30px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.welcome-section h2 {
    margin-bottom: 10px;
    color: var(--primary-color);
}

.stats-section {
    margin-bottom: 30px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.stat-card {
    background-color: var(--bg-color);
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 15px;
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    font-size: 32px;
}

.stat-content h3 {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.stat-number {
    font-size: 28px;
    font-weight: bold;
    color: var(--primary-color);
}

.stat-status {
    font-size: 18px;
    color: var(--text-secondary);
}

.stat-status.connected {
    color: var(--success-color);
}

.recent-posts {
    background-color: var(--bg-color);
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.recent-posts h2 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

.posts-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.recent-post-item {
    padding: 15px;
    background-color: var(--bg-secondary);
    border-radius: 6px;
    border-left: 3px solid var(--accent-color);
}

.post-time {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.post-excerpt {
    font-size: 14px;
    color: var(--text-primary);
}

.no-posts {
    text-align: center;
    color: var(--text-secondary);
    padding: 20px;
}

.quick-actions {
    background-color: var(--bg-color);
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.quick-actions h2 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

.action-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
    font-size: 14px;
    font-weight: 500;
}

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

.btn-primary:hover {
    background-color: #333333;
}

.btn-secondary {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

.btn-outline {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

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

.btn-danger:hover {
    background-color: #dc3545;
}

.btn-small {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-icon {
    font-size: 16px;
}

.post-form {
    background-color: var(--bg-color);
    padding: 30px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input[type="text"],
.form-group input[type="url"],
.form-group input[type="password"],
.form-group input[type="date"],
.form-group input[type="time"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-color);
}

.form-group textarea {
    resize: vertical;
    font-family: inherit;
}

.char-counter {
    text-align: right;
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 5px;
}

.media-url-input {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.media-url-input input {
    flex: 1;
}

.btn-remove-url {
    padding: 8px 12px;
    background-color: var(--danger-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
}

.form-help {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 5px;
}

.form-preview {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.form-preview h3 {
    margin-bottom: 10px;
    color: var(--text-primary);
}

.preview-box {
    padding: 15px;
    background-color: var(--bg-secondary);
    border-radius: 6px;
    min-height: 100px;
}

.preview-empty {
    color: var(--text-secondary);
    font-style: italic;
}

.form-actions {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.message {
    padding: 15px;
    border-radius: 6px;
    margin-top: 20px;
    font-weight: 500;
}

.message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.message.warning {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
}

.message.info {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.scheduled-list-page,
.create-post-page,
.settings-page {
    background-color: var(--bg-color);
    padding: 30px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

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

.filter-select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: white;
    cursor: pointer;
}

.posts-container {
    display: grid;
    gap: 15px;
}

.post-card {
    background-color: var(--bg-secondary);
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.post-card:hover {
    box-shadow: var(--shadow);
}

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

.post-status {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.status-scheduled {
    background-color: #cfe2ff;
    color: #084298;
}

.status-posted {
    background-color: #d4edda;
    color: #155724;
}

.status-failed {
    background-color: #f8d7da;
    color: #721c24;
}

.post-date {
    font-size: 12px;
    color: var(--text-secondary);
}

.post-content {
    margin-bottom: 15px;
}

.post-content p {
    color: var(--text-primary);
    line-height: 1.5;
}

.post-media {
    margin-top: 10px;
}

.media-count {
    font-size: 12px;
    color: var(--text-secondary);
}

.post-actions {
    display: flex;
    gap: 10px;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
}

.empty-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.empty-state h3 {
    margin-bottom: 10px;
    color: var(--text-primary);
}

.empty-state p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background-color: var(--bg-color);
    border-radius: 8px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-secondary);
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-content .post-form {
    box-shadow: none;
    border-radius: 0;
}

.modal-actions {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.settings-section {
    margin-bottom: 40px;
}

.settings-section h3 {
    margin-bottom: 15px;
    color: var(--text-primary);
}

.info-box {
    background-color: #e3f2fd;
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 20px;
    border-left: 4px solid var(--accent-color);
}

.info-box ol {
    margin-left: 20px;
    margin-top: 10px;
}

.info-box a {
    color: var(--accent-color);
    text-decoration: none;
}

.info-box a:hover {
    text-decoration: underline;
}

.settings-form {
    background-color: var(--bg-secondary);
    padding: 20px;
    border-radius: 6px;
}

.system-info {
    background-color: var(--bg-secondary);
    padding: 20px;
    border-radius: 6px;
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.info-row:last-child {
    border-bottom: none;
}

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

.info-value {
    color: var(--text-secondary);
}

.danger-zone {
    background-color: #ffebee;
    padding: 20px;
    border-radius: 6px;
    border: 1px solid #ffcdd2;
}

.warning-text {
    color: var(--danger-color);
    margin-bottom: 15px;
    font-weight: 500;
}

.danger-zone .btn-danger {
    margin-right: 10px;
}

.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

footer {
    margin-top: 50px;
    padding: 20px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
}

/* アカウント管理用スタイル */
.accounts-page {
    background-color: var(--bg-color);
    padding: 30px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.accounts-section {
    margin-bottom: 40px;
}

.accounts-list {
    display: grid;
    gap: 20px;
}

.account-card {
    background-color: var(--bg-secondary);
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.account-card:hover {
    box-shadow: var(--shadow);
}

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

.account-info h3 {
    margin: 0 0 5px 0;
    color: var(--text-primary);
}

.account-username {
    margin: 0;
    color: var(--text-secondary);
    font-size: 14px;
}

.account-status {
    text-align: right;
}

.status-indicator {
    font-size: 14px;
    color: var(--text-secondary);
}

.account-details {
    margin-bottom: 15px;
}

.account-details p {
    margin: 5px 0;
    font-size: 14px;
    color: var(--text-secondary);
}

.account-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.account-modal-content {
    max-width: 600px;
    width: 90%;
}

.form-section {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

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

.form-section h4 {
    margin-bottom: 15px;
    color: var(--text-primary);
    font-size: 16px;
}

.form-group small {
    display: block;
    margin-top: 5px;
    font-size: 12px;
    color: var(--text-secondary);
}

.webhook-section {
    background-color: var(--bg-secondary);
    padding: 20px;
    border-radius: 8px;
    margin-top: 30px;
}

.webhook-section h3 {
    margin-bottom: 15px;
    color: var(--text-primary);
}

.webhook-section .info-box h4 {
    margin-bottom: 10px;
    color: var(--text-primary);
}

.webhook-section code {
    background-color: var(--bg-color);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 12px;
}

.post-status-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.account-name {
    font-size: 12px;
    color: var(--text-secondary);
    background-color: var(--bg-color);
    padding: 2px 6px;
    border-radius: 4px;
}

.warning-message {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
    padding: 15px;
    border-radius: 6px;
    margin-top: 10px;
}

.warning-message p {
    margin: 0 0 10px 0;
}

@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .filter-controls {
        width: 100%;
        flex-direction: column;
        gap: 10px;
    }
    
    .filter-select {
        flex: 1;
    }
    
    .account-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .account-actions {
        width: 100%;
    }
    
    .account-modal-content {
        width: 95%;
        margin: 10px;
    }
}