/* ===== CSS Variables ===== */
:root {
    --color-primary: #3498db;
    --color-primary-dark: #2980b9;
    --color-success: #27ae60;
    --color-success-dark: #229954;
    --color-danger: #e74c3c;
    --color-dark: #2c3e50;
    --color-text: #333;
    --color-bg: #fff;
    --color-bg-light: #f8f9fa;
    --color-border: #ddd;
    
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 15px;
    
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    
    --transition-fast: all 0.2s ease;
    --transition-normal: all 0.3s ease;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
}

/* ===== Reset & Base ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: Arial, sans-serif; line-height: 1.6; color: var(--color-text); }
header { background: var(--color-dark); color: white; text-align: center; padding: var(--spacing-lg); }
main { max-width: 1200px; margin: var(--spacing-lg) auto; padding: 0 var(--spacing-sm); }
footer { background: var(--color-dark); color: white; text-align: center; padding: var(--spacing-lg); margin-top: 4rem; }
footer nav { margin-top: var(--spacing-sm); }
footer nav a { color: white; text-decoration: none; margin: 0 var(--spacing-sm); }
footer nav a:hover { text-decoration: underline; }

/* ===== Buttons ===== */
.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition-normal);
    display: inline-block;
    text-decoration: none;
}
.btn:hover { transform: translateY(-2px); }

.btn-primary { background: var(--color-primary); color: white; }
.btn-primary:hover, .btn-primary.active { background: var(--color-primary-dark); }

.btn-success { background: var(--color-success); color: white; }
.btn-success:hover, .btn-success.active { background: var(--color-success-dark); }

.btn-sm { padding: var(--spacing-xs) var(--spacing-sm); font-size: 1rem; }

/* ===== Cards ===== */
.card {
    background: var(--color-bg-light);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
    margin-bottom: var(--spacing-sm);
}
.card h3, .card h4 { color: var(--color-dark); margin-bottom: var(--spacing-xs); }

/* ===== Tags ===== */
.tag-container { text-align: center; margin-bottom: var(--spacing-lg); }
.tag-container h3 { margin-bottom: var(--spacing-sm); color: var(--color-dark); }
.tag-container p { margin-bottom: var(--spacing-sm); }
.tag-list { display: flex; justify-content: center; gap: var(--spacing-xs); flex-wrap: wrap; }

.tag {
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition-fast);
    border: 1px solid var(--color-primary);
    background: #e8f4f8;
    color: var(--color-dark);
}
.tag:hover { background: var(--color-primary); color: white; transform: translateY(-1px); }

/* ===== Layout ===== */
.action-buttons { text-align: center; margin: var(--spacing-lg) 0; }
.action-buttons .btn { margin: 0 var(--spacing-xs); }

.content-container { position: relative; min-height: 600px; margin: var(--spacing-lg) 0; }
.content-section { 
    position: absolute; 
    width: 100%; 
    top: 0; 
    left: 0; 
    padding: var(--spacing-lg); 
    background: var(--color-bg); 
    border-radius: var(--radius-md); 
    box-shadow: var(--shadow-sm);
}
.content-section h2 { color: var(--color-dark); margin-bottom: var(--spacing-md); text-align: center; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: var(--spacing-sm); }

.centered-content { text-align: center; max-width: 600px; margin: 0 auto; }
.centered-content ul { text-align: left; margin: var(--spacing-lg) 0; }

/* ===== Search ===== */
.search-container { display: flex; max-width: 600px; margin: 0 auto var(--spacing-lg) auto; gap: var(--spacing-xs); }
.search-container input {
    flex: 1;
    padding: 0.75rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
}
.search-container button {
    padding: 0.75rem var(--spacing-md);
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-fast);
}
.search-container button:hover { background: var(--color-primary-dark); }

/* ===== Specific Components ===== */
.welcome { background: var(--color-bg); padding: var(--spacing-lg); margin-bottom: var(--spacing-lg); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); }
.welcome h2 { color: var(--color-dark); margin-bottom: var(--spacing-sm); }
.welcome p { margin-bottom: var(--spacing-sm); line-height: 1.7; }

.tools-results, .search-results { margin-top: var(--spacing-lg); }
.results-count {
    text-align: center;
    margin-bottom: var(--spacing-md);
    font-weight: bold;
    color: var(--color-dark);
    font-size: 1.1rem;
}

.tool-item {
    background: var(--color-bg-light);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
    margin-bottom: var(--spacing-sm);
}
.tool-item h3 { color: var(--color-dark); margin-bottom: var(--spacing-xs); font-size: 1.3rem; }

.tool-description { margin-bottom: var(--spacing-sm); font-size: 1.05rem; line-height: 1.6; }

.tool-details {
    background: white;
    padding: var(--spacing-sm);
    border-radius: 6px;
    margin: var(--spacing-sm) 0;
    border: 1px solid #e8f5e8;
}
.tool-details p { margin-bottom: var(--spacing-xs); font-size: 0.95rem; }

.tool-steps { margin: var(--spacing-sm) 0; }
.tool-steps h4 { color: var(--color-success); margin-bottom: var(--spacing-xs); }
.tool-steps ol { margin-left: var(--spacing-md); }
.tool-steps li { margin-bottom: var(--spacing-xs); line-height: 1.5; }

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
}

.tool-tag {
    padding: 0.3rem 0.6rem;
    border-radius: var(--radius-lg);
    font-size: 0.8rem;
    border: 1px solid var(--color-success);
    background: #e8f5e8;
    color: var(--color-dark);
    display: inline-block;
}

.result-item {
    background: var(--color-bg-light);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-success);
    margin-bottom: var(--spacing-sm);
}
.result-item h3 { color: var(--color-dark); margin-bottom: var(--spacing-xs); font-size: 1.3rem; }

.authors {
    font-style: italic;
    color: #666;
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
}

.summary {
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
}

/* ===== Concern-Based Categories ===== */
.priority-1 { border-color: #e74c3c; background: #fdf2f2; }
.priority-1:hover { background: #e74c3c; }

.priority-2 { border-color: #f39c12; background: #fef9e7; }
.priority-2:hover { background: #f39c12; }

.priority-3 { border-color: #f1c40f; background: #fffbf0; }
.priority-3:hover { background: #f1c40f; }

.priority-4, .priority-5, .priority-6 { border-color: #95a5a6; background: #f8f9fa; }
.priority-4:hover, .priority-5:hover, .priority-6:hover { background: #95a5a6; }

.concern-stat {
    font-size: 0.8em;
    opacity: 0.8;
    font-weight: normal;
}

.priority-badge {
    background: #e74c3c;
    color: white;
    padding: 0.2rem 0.5rem;
    border-radius: 12px;
    font-size: 0.7rem;
    margin-left: 0.5rem;
    font-weight: normal;
}

.concern-category {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    font-style: italic;
}