/* ==============================================
   HOSTEL MANAGEMENT SYSTEM - Base Stylesheet
   Global styles applied across the entire site
   ============================================== */

/* CSS Variables */
:root {
    --primary: #0056b3;
    --primary-hover: #004494;
    --background: #f4f6f9;
    --surface: #ffffff;
    --text-primary: #333333;
    --text-secondary: #555555;
    --border: #dee2e6;
    --success: #28a745;
    --error: #dc3545;
    --warning: #ffc107;
    --shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ==============================================
   TYPOGRAPHY
   ============================================== */

h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    margin-bottom: 15px;
    font-weight: 600;
}

h1 { font-size: 28px; }
h2 { font-size: 24px; }
h3 { font-size: 20px; }
h4 { font-size: 18px; }

p {
    margin-bottom: 10px;
    color: var(--text-secondary);
}

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

a:hover {
    text-decoration: underline;
}

/* ==============================================
   FORMS (Base)
   ============================================== */

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.form-group label .required {
    color: var(--error);
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    font-family: inherit;
    font-size: 14px;
    color: var(--text-primary);
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
}

.form-control::placeholder {
    color: #999;
}

select.form-control {
    cursor: pointer;
}

textarea.form-control {
    resize: vertical;
    min-height: 80px;
}

.form-hint {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ==============================================
   BUTTONS (Base)
   ============================================== */

.btn {
    display: inline-block;
    padding: 10px 20px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    text-align: center;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    text-decoration: none;
}

.btn-secondary {
    background-color: #6c757d;
    color: #ffffff;
}

.btn-secondary:hover {
    background-color: #5a6268;
}

.btn-success {
    background-color: var(--success);
    color: #ffffff;
}

.btn-success:hover {
    background-color: #218838;
}

.btn-danger {
    background-color: var(--error);
    color: #ffffff;
}

.btn-danger:hover {
    background-color: #c82333;
}

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

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

/* ==============================================
   ALERTS (Base)
   ============================================== */

.alert {
    padding: 12px 15px;
    border-radius: 4px;
    margin-bottom: 20px;
    font-size: 14px;
}

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

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

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

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

/* ==============================================
   CARDS (Base)
   ============================================== */

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    box-shadow: var(--shadow);
    padding: 30px;
}

.card-header {
    text-align: center;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.card-header h2 {
    margin-bottom: 5px;
}

.card-header p {
    font-size: 14px;
    margin-bottom: 0;
}

/* ==============================================
   NAVBAR (Base)
   ============================================== */

.navbar {
    background-color: var(--primary);
    color: #ffffff;
    padding: 15px 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.navbar-brand {
    font-size: 18px;
    font-weight: 600;
    color: #ffffff;
}

.navbar-brand:hover {
    text-decoration: none;
}

.navbar-nav {
    display: flex;
    gap: 20px;
    list-style: none;
}

.navbar-nav a {
    color: rgba(255, 255, 255, 0.9);
    font-size: 14px;
}

.navbar-nav a:hover {
    color: #ffffff;
    text-decoration: none;
}

/* ==============================================
   TABLES (Base)
   ============================================== */

.table-responsive {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    background: var(--surface);
}

.table th,
.table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.table th {
    background-color: var(--background);
    font-weight: 600;
    color: var(--text-primary);
}

.table tbody tr:hover {
    background-color: var(--background);
}

/* ==============================================
   BADGES (Base)
   ============================================== */

.badge {
    display: inline-block;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 3px;
}

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

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

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

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

/* ==============================================
   RESPONSIVE (Base)
   ============================================== */

@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: 15px;
    }
    
    .navbar-nav {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    h1 { font-size: 24px; }
    h2 { font-size: 20px; }
    h3 { font-size: 18px; }
}