:root {
    --primary: #5D4037;
    --primary-dark: #3E2723;
    --primary-light: #8D6E63;
    --secondary: #FF7043;
    --secondary-dark: #E64A19;
    --text-light: #f5f5f5;
    --text-dark: #212121;
    --success: #4CAF50;
    --danger: #F44336;
    --warning: #FFC107;
    --info: #2196F3;
    --bg-dark: #2e1d1b;
    --card-bg: #4E342E;
    --border-radius: 12px;
    --box-shadow: 0 8px 24px rgba(0,0,0,0.2);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background: var(--bg-dark);
    color: var(--text-light);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

.container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar Styles */
.sidebar {
    width: 280px;
    background: var(--primary-dark);
    padding: 20px 0;
    transition: var(--transition);
    position: fixed;
    height: 100vh;
    z-index: 100;
    box-shadow: 4px 0 10px rgba(0,0,0,0.1);
}

.sidebar-header {
    padding: 0 20px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    margin-bottom: 20px;
}

.sidebar-header h2 {
    color: var(--text-light);
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-header h2 i {
    color: var(--secondary);
}

.nav-menu {
    list-style: none;
    padding: 0 10px;
}

.nav-item {
    margin-bottom: 5px;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 12px 15px;
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition);
}

.nav-link i {
    margin-right: 12px;
    width: 20px;
    text-align: center;
}

.nav-link:hover, .nav-link.active {
    background: rgba(255,255,255,0.1);
    color: var(--text-light);
}

.nav-link.active {
    background: var(--secondary);
    color: white;
    font-weight: 500;
}

/* Main Content Styles */
.main-content {
    flex: 1;
    margin-left: 280px;
    padding: 30px;
    transition: var(--transition);
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.header-title h1 {
    font-size: 1.8rem;
    color: var(--text-light);
    font-weight: 600;
}

.header-title p {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.7);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-profile img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.user-info h4 {
    font-size: 0.9rem;
    font-weight: 500;
}

.user-info p {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.6);
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    animation: fadeIn 0.5s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 28px rgba(0,0,0,0.25);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.card-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-light);
}

.card-header .card-tools {
    display: flex;
    gap: 10px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: rgba(255,255,255,0.9);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    font-size: 1rem;
    border-radius: 8px;
    border: none;
    background: rgba(255,255,255,0.1);
    color: var(--text-light);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    background: rgba(255,255,255,0.15);
    box-shadow: 0 0 0 3px rgba(255,112,67,0.3);
}

.form-control[readonly], .form-control:disabled {
    background: rgba(255,255,255,0.05);
    cursor: not-allowed;
}

.input-group {
    display: flex;
    gap: 10px;
}

.input-group .form-control {
    flex: 1;
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    gap: 8px;
}

.btn i {
    font-size: 0.9rem;
}

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

.btn-primary:hover {
    background: var(--secondary-dark);
    transform: translateY(-2px);
}

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

.btn-danger:hover {
    background: #d32f2f;
    transform: translateY(-2px);
}

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

.btn-success:hover {
    background: #388E3C;
    transform: translateY(-2px);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
}

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

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
    animation: fadeIn 0.5s ease;
}

.table th, .table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.table th {
    background-color: var(--primary);
    color: var(--text-light);
    font-weight: 500;
    position: sticky;
    top: 0;
    cursor: pointer;
}

.table th:hover {
    background-color: var(--primary-dark);
}

.table tr:hover {
    background-color: rgba(255,255,255,0.05);
}

.table .actions {
    display: flex;
    gap: 8px;
}

.used-true {
    color: var(--danger);
    font-weight: 600;
}

.used-false {
    color: var(--success);
    font-weight: 600;
}

.used-expired {
    color: var(--warning);
    font-weight: 600;
}

/* Status Messages */
.status-msg {
    padding: 12px 15px;
    border-radius: 8px;
    margin: 15px 0;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideIn 0.3s ease;
    position: relative;
}

.status-msg i {
    font-size: 1.2rem;
}

.error-msg {
    background-color: rgba(244, 67, 54, 0.2);
    color: var(--danger);
    border-left: 4px solid var(--danger);
}

.success-msg {
    background-color: rgba(76, 175, 80, 0.2);
    color: var(--success);
    border-left: 4px solid var(--success);
}

.info-msg {
    background-color: rgba(33, 150, 243, 0.2);
    color: var(--info);
    border-left: 4px solid var(--info);
}

/* Login Form */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: url('https://images.unsplash.com/photo-1517248135467-4c7edcad34c4?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1470&q=80') no-repeat center center;
    background-size: cover;
    position: relative;
}

.login-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(46, 29, 27, 0.85);
}

.login-card {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 500px;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.5);
    animation: fadeInUp 0.6s ease;
}

.login-card h2 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--text-light);
    font-weight: 600;
}

.login-logo {
    text-align: center;
    margin-bottom: 30px;
}

.login-logo i {
    font-size: 3rem;
    color: var(--secondary);
}

.login-logo h1 {
    margin-top: 10px;
    font-size: 1.8rem;
    color: var(--text-light);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(46, 29, 27, 0.85);
    z-index: 200;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 500px;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.5);
    animation: fadeInUp 0.6s ease;
}

.modal-content h2 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--text-light);
    font-weight: 600;
}

.close-modal {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 1.5rem;
    color: var(--text-light);
    cursor: pointer;
}

/* Page Transitions */
.page {
    display: none;
    animation: fadeIn 0.5s ease;
}

.page.active {
    display: block;
}

/* Settings Toggle */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 34px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .toggle-slider {
    background-color: var(--success);
}

input:checked + .toggle-slider:before {
    transform: translateX(26px);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    position: fixed;
    top: 15px;
    left: 15px;
    z-index: 150;
    background: var(--secondary);
    color: white;
    border: none;
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}

.mobile-menu-btn:hover {
    background: var(--secondary-dark);
}

/* Pagination */
.pagination button {
    min-width: 100px;
}

.pagination span {
    color: var(--text-light);
    font-size: 1rem;
    align-self: center;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Responsive */
@media (max-width: 992px) {
    .sidebar {
        width: 80px;
        overflow: hidden;
    }
    .sidebar-header h2 span, .nav-link span {
        display: none;
    }
    .nav-link {
        justify-content: center;
    }
    .nav-link i {
        margin-right: 0;
        font-size: 1.2rem;
    }
    .main-content {
        margin-left: 80px;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        position: fixed;
    }
    .sidebar.active {
        transform: translateX(0);
        width: 280px;
    }
    .sidebar-header h2 span, .nav-link span {
        display: inline;
    }
    .nav-link {
        justify-content: flex-start;
    }
    .nav-link i {
        margin-right: 12px;
    }
    .main-content {
        margin-left: 0;
    }
    .mobile-menu-btn {
        display: block;
    }
}