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

:root {
    --primary-color: #2563eb;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --dark-color: #1e293b;
    --light-color: #f8fafc;
    --border-color: #e2e8f0;
    --text-color: #334155;
    --text-light: #64748b;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
    background-color: var(--light-color);
    line-height: 1.6;
}

/* Login Page */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
}

.login-box h1 {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.login-box h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    font-size: 1.25rem;
}

.login-footer {
    text-align: center;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.875rem;
    color: var(--text-light);
}

/* Navbar */
.navbar {
    background: white;
    padding: 1rem 2rem;
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-brand h2 {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.username {
    color: var(--text-color);
    font-weight: 500;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
}

/* Container and Layout */
.container {
    display: flex;
    min-height: calc(100vh - 70px);
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: white;
    box-shadow: var(--shadow);
    padding: 1.5rem 0;
    overflow-y: auto;
    transition: transform 0.3s ease;
}

.main-menu {
    list-style: none;
}

.main-menu-item {
    margin-bottom: 0.25rem;
}

.main-menu-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.5rem;
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s;
}

.main-menu-link:hover,
.main-menu-item.active > .main-menu-link {
    background: var(--light-color);
    color: var(--primary-color);
}

.menu-arrow {
    font-size: 0.75rem;
    transition: transform 0.3s;
}

.main-menu-item.active .menu-arrow {
    transform: rotate(180deg);
}

.sub-menu {
    list-style: none;
    display: none;
    background: white;
}


.sub-menu li a {
    display: block;
    padding: 0.625rem 1.5rem 0.625rem 3rem;
    color: var(--text-light);
    text-decoration: none;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.sub-menu li a:hover,
.sub-menu li a.active {
    background: var(--light-color);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 2rem;
    overflow-x: auto;
}

.welcome-message {
    text-align: center;
    padding: 4rem 2rem;
    background: white;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.welcome-message h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Table Styles */
.table-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.table-header h2 {
    color: var(--text-color);
    font-size: 1.5rem;
}

.table-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.table-wrapper {
    background: white;
    border-radius: 10px;
    box-shadow: var(--shadow);
    overflow-x: auto;
}

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

.data-table thead {
    background: var(--light-color);
}

.data-table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-color);
    border-bottom: 2px solid var(--border-color);
    white-space: nowrap;
}

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

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

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

.actions {
    white-space: nowrap;
}

.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    padding: 0.25rem 0.5rem;
    transition: transform 0.2s;
}

.btn-icon:hover {
    transform: scale(1.1);
}

.btn-edit {
    color: var(--primary-color);
}

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

/* Buttons */
.btn {
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

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

.btn-primary:hover {
    background: #1d4ed8;
}

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

.btn-secondary:hover {
    background: #475569;
}

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

.btn-danger:hover {
    background: #dc2626;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.8125rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* Forms */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-color);
}

.required {
    color: var(--danger-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.875rem;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #10b981;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #ef4444;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    overflow-y: auto;
}

.modal-content {
    background: white;
    margin: 2rem auto;
    max-width: 600px;
    width: 90%;
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
    animation: modalSlideIn 0.3s;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    color: var(--text-color);
    font-size: 1.25rem;
}

.close {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-light);
    cursor: pointer;
    line-height: 1;
}

.close:hover {
    color: var(--text-color);
}

.modal-body {
    padding: 1.5rem;
    max-height: 60vh;
    overflow-y: auto;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .navbar {
        padding: 1rem;
    }

    .navbar-menu {
        display: none;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .sidebar {
        position: fixed;
        top: 70px;
        left: 0;
        height: calc(100vh - 70px);
        z-index: 999;
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        padding: 1rem;
        margin-left: 0;
    }

    .table-header {
        flex-direction: column;
        align-items: stretch;
    }

    .table-actions {
        width: 100%;
    }

    .table-actions .btn {
        flex: 1;
    }

    .data-table {
        font-size: 0.875rem;
    }

    .data-table th,
    .data-table td {
        padding: 0.75rem 0.5rem;
    }

    .modal-content {
        width: 95%;
        margin: 1rem auto;
    }

    .modal-body {
        max-height: 70vh;
    }
}

@media (max-width: 480px) {
    .login-container {
        padding: 10px;
    }

    .login-box {
        padding: 1.5rem;
    }

    .data-table {
        font-size: 0.75rem;
    }

    .data-table th,
    .data-table td {
        padding: 0.5rem 0.25rem;
    }

    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.8125rem;
    }
}

/* Utility Classes */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* Desktop hover dropdown behavior */
@media (min-width: 769px) {
    .main-menu-item {
        position: relative;
    }

    .sub-menu {
        display: none;
    }

    .main-menu-item:hover > .sub-menu {
        display: block;
    }
}
/* Mobile click dropdown behavior */
@media (max-width: 768px) {
    .sub-menu {
        display: none;
    }

    .sub-menu.open {
        display: block;
    }
}