/* 
 * SMS Manager - Main Stylesheet
 * Color Palette:
 * - Primary (Dark Blue): #1A3E7C
 * - Secondary (Sky Blue): #4A90E2
 * - Background (Light Gray): #F5F7FA
 * - Text (Dark Gray): #333333
 * - Success (Green): #28A745
 * - Danger (Red): #E63946
 */

:root {
    --primary: #1A3E7C;
    --primary-dark: #0F2A5C;
    --primary-light: #2A5298;
    --secondary: #4A90E2;
    --secondary-dark: #3A7BC8;
    --secondary-light: #6BA8F0;
    --bg-light: #F5F7FA;
    --bg-white: #FFFFFF;
    --text-dark: #333333;
    --text-muted: #6B7280;
    --text-light: #9CA3AF;
    --success: #28A745;
    --success-light: #D4EDDA;
    --danger: #E63946;
    --danger-light: #F8D7DA;
    --warning: #F59E0B;
    --warning-light: #FEF3C7;
    --border: #E5E7EB;
    --shadow: rgba(26, 62, 124, 0.1);
    --shadow-lg: rgba(26, 62, 124, 0.15);
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Tajawal', sans-serif;
    background-color: var(--bg-light);
    color: var(--text-dark);
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--primary);
    font-weight: 700;
}

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

a:hover {
    color: var(--primary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow-lg);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-light) 100%);
    color: white;
}

.btn-secondary:hover {
    background: linear-gradient(135deg, var(--secondary-dark) 0%, var(--secondary) 100%);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
}

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

.btn-danger {
    background: var(--danger);
    color: white;
}

/* Cards */
.card {
    background: var(--bg-white);
    border-radius: 1rem;
    box-shadow: 0 4px 6px var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--shadow-lg);
}

/* Navigation */
.navbar {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    padding: 1rem;
    box-shadow: 0 2px 10px var(--shadow-lg);
}

.navbar-admin {
    background: linear-gradient(135deg, var(--danger) 0%, #FF6B6B 100%);
}

/* Forms */
.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    background: var(--bg-white);
}

.form-input:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.2);
}

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

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
}

.alert-success {
    background: var(--success-light);
    color: var(--success);
    border: 1px solid var(--success);
}

.alert-danger {
    background: var(--danger-light);
    color: var(--danger);
    border: 1px solid var(--danger);
}

.alert-warning {
    background: var(--warning-light);
    color: var(--warning);
    border: 1px solid var(--warning);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success {
    background: var(--success-light);
    color: var(--success);
}

.badge-danger {
    background: var(--danger-light);
    color: var(--danger);
}

.badge-primary {
    background: rgba(74, 144, 226, 0.15);
    color: var(--secondary);
}

/* Tables */
.table-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    background: var(--bg-light);
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    padding: 1rem;
    text-align: right;
}

td {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
}

tr:hover {
    background: var(--bg-light);
}

/* Stats Cards */
.stat-card {
    background: var(--bg-white);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 4px 6px var(--shadow);
}

.stat-card-primary {
    border-right: 4px solid var(--primary);
}

.stat-card-success {
    border-right: 4px solid var(--success);
}

.stat-card-danger {
    border-right: 4px solid var(--danger);
}

.stat-card-warning {
    border-right: 4px solid var(--warning);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Gradient backgrounds */
.gradient-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
}

.gradient-secondary {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-light) 100%);
}

.gradient-hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .navbar {
        padding: 0.75rem;
    }
    
    .navbar .container {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .navbar-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.5rem;
    }
    
    .navbar-links a {
        padding: 0.5rem 0.75rem;
        font-size: 0.875rem;
    }
    
    .stat-card {
        padding: 1rem;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    table {
        font-size: 0.875rem;
    }
    
    th, td {
        padding: 0.75rem 0.5rem;
    }
    
    .btn {
        padding: 0.625rem 1rem;
        font-size: 0.875rem;
    }
    
    .card {
        border-radius: 0.75rem;
    }
    
    h1 {
        font-size: 1.75rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .hide-mobile {
        display: none !important;
    }
}

@media (max-width: 480px) {
    .navbar-links {
        width: 100%;
    }
    
    .navbar-links a {
        flex: 1;
        text-align: center;
        padding: 0.5rem;
        font-size: 0.75rem;
    }
    
    .stat-value {
        font-size: 1.25rem;
    }
    
    th, td {
        padding: 0.5rem 0.25rem;
        font-size: 0.75rem;
    }
    
    .form-input {
        padding: 0.75rem;
    }
}

/* Utility Classes */
.text-primary { color: var(--primary) !important; }
.text-secondary { color: var(--secondary) !important; }
.text-success { color: var(--success) !important; }
.text-danger { color: var(--danger) !important; }
.text-muted { color: var(--text-muted) !important; }

.bg-primary { background-color: var(--primary) !important; }
.bg-secondary { background-color: var(--secondary) !important; }
.bg-success { background-color: var(--success) !important; }
.bg-danger { background-color: var(--danger) !important; }
.bg-light { background-color: var(--bg-light) !important; }

.border-primary { border-color: var(--primary) !important; }
.border-secondary { border-color: var(--secondary) !important; }
.border-success { border-color: var(--success) !important; }
.border-danger { border-color: var(--danger) !important; }

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fadeIn {
    animation: fadeIn 0.3s ease-out;
}

/* Modal */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 50;
    padding: 1rem;
}

.modal-backdrop.active {
    display: flex;
}

.modal-content {
    background: var(--bg-white);
    border-radius: 1rem;
    max-width: 28rem;
    width: 100%;
    padding: 1.5rem;
    box-shadow: 0 25px 50px var(--shadow-lg);
    animation: fadeIn 0.2s ease-out;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-light);
}

::-webkit-scrollbar-thumb {
    background: var(--secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}