/* styles.css for Expense Tracker App */

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    color: #333;
    line-height: 1.6;
}

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

/* Header Styles */
header {
    margin-bottom: 30px;
    padding: 20px;
    background: linear-gradient(135deg, #2c3e50, #1a2530);
    color: white;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.header-content {
    display: flex;
    align-items: center;
    gap: 20px;
}

.btn-back {
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: 1.2rem;
    transition: background-color 0.3s ease;
}

.btn-back:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

header h1 {
    font-size: 2rem;
    margin: 0;
    flex: 1;
    text-align: center;
}

#current-date {
    font-size: 1rem;
    opacity: 0.9;
    text-align: right;
    min-width: 200px;
}

/* Section Styles */
section {
    background-color: white;
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 30px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.08);
}

section h2 {
    color: #2c3e50;
    font-size: 1.8rem;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #3498db;
}

/* Form Styles */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #2c3e50;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: #3498db;
    outline: none;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.btn-submit {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 14px 25px;
    font-size: 1.1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    font-weight: 500;
}

.btn-submit:hover {
    background-color: #2980b9;
}

/* Summary Styles */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.summary-card {
    background: linear-gradient(135deg, #3498db, #2c3e50);
    color: white;
    padding: 25px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.summary-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
}

.summary-card p {
    font-size: 1.8rem;
    font-weight: 700;
}

/* Filter Controls */
.filter-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 25px;
    padding: 20px;
    background-color: #f1f8ff;
    border-radius: 8px;
}

.filter-group {
    flex: 1;
    min-width: 200px;
}

.filter-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #2c3e50;
}

.btn-clear {
    align-self: flex-end;
    background-color: #e74c3c;
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.3s ease;
}

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

/* Table Styles */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

thead {
    background-color: #3498db;
    color: white;
}

th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

tr:hover {
    background-color: #f5f9ff;
}

.btn-delete {
    background-color: #e74c3c;
    color: white;
    border: none;
    padding: 8px 15px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

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

/* Category Management */
.category-controls {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
}

.category-controls input {
    flex: 1;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
}

.btn-add {
    background-color: #2ecc71;
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.btn-add:hover {
    background-color: #27ae60;
}

#category-list {
    list-style-type: none;
}

#category-list li {
    padding: 12px;
    background-color: #f1f8ff;
    margin-bottom: 10px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Export Section */
.btn-export {
    background-color: #9b59b6;
    color: white;
    border: none;
    padding: 14px 25px;
    font-size: 1.1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    font-weight: 500;
}

.btn-export:hover {
    background-color: #8e44ad;
}

/* Footer */
footer {
    text-align: center;
    margin-top: 30px;
    padding: 20px;
    color: #7f8c8d;
    font-size: 1rem;
    border-top: 1px solid #eee;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    header {
        padding: 20px 15px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    section {
        padding: 20px 15px;
    }
    
    .summary-cards {
        grid-template-columns: 1fr;
    }
    
    .filter-controls {
        flex-direction: column;
    }
    
    .category-controls {
        flex-direction: column;
    }
    
    table {
        font-size: 0.9rem;
    }
    
    th, td {
        padding: 10px 8px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }
    
    header h1 {
        font-size: 1.8rem;
    }
    
    section h2 {
        font-size: 1.5rem;
    }
    
    .btn-submit,
    .btn-export {
        width: 100%;
        padding: 14px;
    }
}