/* ========================== GENERAL STYLES ========================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

html, body {
    height: 100%;
}

/* ========================== TYPOGRAPHY ========================== */
h1, h4, h5, h6 {
    color: #2c3e50;
    margin-bottom: 15px;
}

h1 {
    font-size: 28px;
}

h2 {
    font-size: 24px;
}

h3 {
    font-size: 20px;
}

a {
    color: #3498db;
    text-decoration: none;
    transition: color 0.3s;
}

a:hover {
    color: #2980b9;
}

/* ========================== BUTTONS ========================== */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s;
    text-align: center;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.btn-primary {
    background-color: #3498db;
    color: white;
}

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

.btn-secondary {
    background-color: #95a5a6;
    color: white;
}

.btn-secondary:hover {
    background-color: #7f8c8d;
}

.btn-success {
    background-color: #27ae60;
    color: white;
}

.btn-success:hover {
    background-color: #229954;
}

.btn-danger {
    background-color: #e74c3c;
    color: white;
}

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

.btn-warning {
    background-color: #f39c12;
    color: white;
}

.btn-warning:hover {
    background-color: #d68910;
}

.btn-info {
    background-color: #2980b9;
    color: white;
}

.btn-info:hover {
    background-color: #1f618d;
}

.btn-block {
    display: block;
    width: 100%;
}

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

.btn-lg {
    padding: 12px 24px;
    font-size: 16px;
}

/* ========================== FORM STYLES ========================== */
.form-group {
    margin-bottom: 20px;
}

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

input[type="text"],
input[type="email"],
input[type="password"],
input[type="date"],
input[type="time"],
input[type="number"],
textarea,
select {
    width: 100%;
    padding: 10px;
    border: 1px solid #bdc3c7;
    border-radius: 5px;
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.3s;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="date"]:focus,
input[type="time"]:focus,
input[type="number"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 5px rgba(52, 152, 219, 0.3);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-row.three {
    grid-template-columns: 1fr 1fr 1fr;
}

/* ========================== ALERTS ========================== */
.alert {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 5px;
    border-left: 4px solid;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border-color: #28a745;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
    border-color: #f5c6cb;
}

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
    border-color: #ffeeba;
}

.alert-info {
    background-color: #d1ecf1;
    color: #0c5460;
    border-color: #bee5eb;
}

.alert strong {
    font-weight: 600;
}

/* ========================== TABLES ========================== */
.table {
    width: 100%;
    border-collapse: collapse;
    background-color: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    border-radius: 5px;
    overflow: hidden;
}

.table th {
    background-color: #34495e;
    color: white;
    padding: 15px;
    text-align: left;
    font-weight: 600;
}

.table td {
    padding: 15px;
    border-bottom: 1px solid #ecf0f1;
}

.table tbody tr:hover {
    background-color: #f9f9f9;
}

.table tbody tr:last-child td {
    border-bottom: none;
}

.table .status {
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

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

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

.status.warning {
    background-color: #fff3cd;
    color: #856404;
}

.status.info {
    background-color: #d1ecf1;
    color: #0c5460;
}

/* ========================== CARDS ========================== */
.card {
    background-color: white;
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    overflow: hidden;
    margin-bottom: 20px;
}

.card-header {
    background-color: #34495e !important;
    color: white !important;
    padding: 15px;
    font-weight: 600;
    border-bottom: 1px solid #ecf0f1;
}

.card-header h2,
.card-header h3 {
    color: white !important;
    margin: 0 !important;
    text-shadow: none !important;
    font-weight: inherit !important;
}

.card-header * {
    color: white !important;
    text-shadow: none !important;
}

/* Override any possible color definitions in h2, h3, div, span inside card-header */
.card-header h2 * { color: white !important; }
.card-header h3 * { color: white !important; }
.card-header div { color: white !important; }
.card-header span { color: white !important; }

.card-body {
    padding: 20px;
}

.card-footer {
    background-color: #ecf0f1;
    padding: 15px;
    border-top: 1px solid #bdc3c7;
}

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

.row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.row.three {
    grid-template-columns: 1fr 1fr 1fr;
}

.row.four {
    grid-template-columns: 1fr 1fr 1fr 1fr;
}

.col {
    display: flex;
    flex-direction: column;
}

.text-center {
    text-align: center;
}

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

.text-left {
    text-align: left;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

.p-20 {
    padding: 20px;
}

.d-flex {
    display: flex;
}

.justify-between {
    justify-content: space-between;
}

.align-center {
    align-items: center;
}

.gap-10 {
    gap: 10px;
}

.code {
    background-color: #f4f4f4;
    border: 1px solid #ddd;
    border-radius: 3px;
    padding: 2px 6px;
    font-family: 'Courier New', monospace;
    font-size: 13px;
}

/* ========================== RESPONSIVE ========================== */
@media (max-width: 768px) {
    .form-row,
    .row,
    .row.three,
    .row.four {
        grid-template-columns: 1fr;
    }
    
    .table {
        font-size: 13px;
    }
    
    .table th,
    .table td {
        padding: 10px;
    }
    
    .btn {
        padding: 8px 16px;
        font-size: 12px;
    }
}