/* --- Global Styles & Variables --- */
:root {
    --primary-color: #5e72e4; /* A more modern, vibrant blue/purple */
    --secondary-color: #f4f5f7;
    --success-color: #2dce89;
    --danger-color: #f5365c;
    --info-color: #11cdef;
    --bg-color: #f4f7f9; /* A softer background */
    --surface-color: #ffffff;
    --text-color: #32325d; /* A softer black */
    --text-muted-color: #8898aa;
    --border-color: #e9ecef;
    --font-family: 'Poppins', sans-serif;
    --box-shadow: 0 4px 6px rgba(50, 50, 93, 0.11), 0 1px 3px rgba(0, 0, 0, 0.08);
}

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&display=swap');

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: #3b55d1;
    text-decoration: none;
}

.container {
    max-width: 1140px; 
    margin: 2rem auto;
    padding: 0 1.5rem;
}

/* --- Animations --- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.5s ease-out forwards;
}

/* --- Card Style --- */
.card {
    background-color: var(--surface-color);
    padding: 2.5rem;
    border-radius: 8px;
    box-shadow: var(--box-shadow);
    border: 1px solid var(--border-color);
    opacity: 0; /* for animation */
    animation: fadeInUp 0.5s ease-out forwards;
}

/* --- Header --- */
.main-header {
    background-color: var(--surface-color);
    padding: 0.75rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 1px 3px rgba(0,0,0,0.02);
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-color);
    letter-spacing: -0.5px;
}
.logo span {
    color: var(--primary-color);
}

.user-nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.user-nav .user-info {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.8rem;
    border-radius: 20px; /* Pill shape */
    background-color: var(--secondary-color);
    color: var(--text-muted-color);
    font-size: 0.875rem;
    font-weight: 600;
}

.user-nav .user-info svg {
    width: 14px;
    height: 14px;
    fill: currentColor;
}

.user-nav a {
    display: inline-block;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    color: var(--text-muted-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.875rem;
    border: 1px solid transparent;
    transition: all 0.2s ease-in-out;
}

.user-nav a:hover {
    background-color: var(--secondary-color);
    color: var(--text-color);
    transform: none; /* remove previous hover effect */
    box-shadow: none;
}
.user-nav a.active {
    background-color: var(--primary-color);
    color: #fff;
}


/* --- Forms & Inputs --- */
.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

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

.form-group input, 
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-color);
    box-sizing: border-box;
    transition: all 0.2s;
    font-size: 0.9rem;
    font-family: var(--font-family);
}

.form-group input:focus, 
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 2px rgba(94, 114, 228, 0.25);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-image: linear-gradient(to right, #5e72e4 0%, #8965e0 100%);
    color: #fff;
    padding: 0.85rem 1.75rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.2s;
    box-shadow: var(--box-shadow);
    width: 100%;
}

.btn:hover {
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 7px 14px rgba(50, 50, 93, 0.1), 0 3px 6px rgba(0, 0, 0, 0.08);
}
.btn:active { transform: translateY(0); }
.btn:disabled {
    background-image: none;
    background-color: #adb5bd;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}
.btn.btn-secondary {
    background-image: none;
    background-color: var(--secondary-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}
.btn.btn-secondary:hover { background-color: #e9ecef; color: var(--text-color); }

.btn.btn-danger {
    background-image: none;
    background-color: var(--danger-color);
}
.btn.btn-danger:hover { background-color: #d43152; }


/* --- Generator Specifics --- */
.platform-selector {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}
.platform-selector input[type="radio"] { display: none; }
.platform-selector label {
    flex: 1;
    padding: 0.85rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 600;
}
.platform-selector input[type="radio"]:checked + label {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
    box-shadow: 0 2px 4px rgba(94, 114, 228, 0.25);
}

.result-section { display: none; margin-top: 2rem; }
.article-content {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background-color: var(--secondary-color);
    border-radius: 4px;
    border: 1px solid var(--border-color);
    white-space: pre-wrap;
    line-height: 1.7;
    font-family: 'Courier New', Courier, monospace;
}

/* --- 标题建议样式 --- */
.title-suggestions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1rem;
}

.title-suggestion-item {
    padding: 0.75rem 1rem;
    background-color: var(--secondary-color);
    border-radius: 4px;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.title-suggestion-item:hover {
    background-color: #e9ecef;
    transform: translateY(-2px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.title-suggestion-item.recommended {
    background-color: #f0f8ff; /* 浅蓝色背景 */
    border: 1px solid #b3d7ff; /* 蓝色边框 */
    padding-right: 110px; /* 为推荐标签留出空间 */
}

.recommend-badge {
    position: absolute;
    top: 0;
    right: 0;
    background-color: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: bold;
    border-radius: 0 4px 0 4px;
}

.badge-success {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: bold;
    color: white;
    background-color: var(--success-color);
    border-radius: 4px;
    margin-left: 0.5rem;
    vertical-align: middle;
}

/* --- 文章标签样式 --- */
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1rem;
}

.article-tag-item {
    padding: 0.5rem 1rem;
    background-color: #f0f8ff;
    border: 1px solid #b3d7ff;
    border-radius: 20px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
}

.article-tag-item:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.article-tag-item i {
    margin-right: 0.5rem;
    font-size: 0.8rem;
    opacity: 0.7;
}

/* --- Admin Styles --- */
.admin-card {
    background-color: var(--surface-color);
    padding: 2.5rem;
    border-radius: 8px;
    box-shadow: var(--box-shadow);
    border: 1px solid var(--border-color);
}
.admin-sidebar ul li a:hover, .admin-sidebar ul li.active a {
    background-color: var(--primary-color);
    color: #fff;
}
.modal-content {
    box-shadow: var(--box-shadow);
}

/* --- Completeness Info Styles --- */
.completeness-info {
    margin-bottom: 1.5rem;
    padding: 1rem;
    border-radius: 6px;
    background-color: #f8f9fa;
    border: 1px solid var(--border-color);
}

.completeness-info .alert {
    margin-bottom: 0.75rem;
    padding: 0.75rem;
    border-radius: 4px;
    font-size: 0.9rem;
}

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

.completeness-info .alert-warning {
    background-color: #fff3cd;
    border: 1px solid #ffeaa7;
    color: #856404;
}

.completeness-info .alert i {
    margin-right: 0.5rem;
}

.completeness-issues {
    margin-top: 0.75rem;
    padding: 0.75rem;
    background-color: #fff;
    border-radius: 4px;
    border: 1px solid #e9ecef;
}

.completeness-issues ul {
    margin: 0.5rem 0 0 0;
    padding-left: 1.5rem;
}

.completeness-issues li {
    margin-bottom: 0.25rem;
    color: #6c757d;
    font-size: 0.85rem;
}

.completeness-stats {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.completeness-stats small {
    color: var(--text-muted-color);
    font-size: 0.8rem;
}

/* --- Loading Overlay --- */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.loading-overlay.visible {
    opacity: 1;
    visibility: visible;
}

.spinner-large {
    width: 50px;
    height: 50px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

.spinner-small {
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    display: inline-block;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
    .container {
        margin: 1rem auto;
        padding: 0 1rem;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .main-header {
        padding: 0.5rem 1rem;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .user-nav {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .platform-selector {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .platform-selector label {
        width: 100%;
        text-align: center;
    }
}