/* --- Global Styles & Variables --- */
:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --success-color: #2ecc71;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --light-gray: #ecf0f1;
    --medium-gray: #bdc3c7;
    --dark-gray: #7f8c8d;
    --bg-color: #f4f7f9;
    --white-color: #ffffff;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --border-radius: 5px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    margin: 0;
    color: var(--secondary-color);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin-left 0.3s ease;
}

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

a:hover {
    color: #2980b9;
}

/* --- Login Page Specific Styles --- */
.login-body {
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, var(--secondary-color) 0%, #34495e 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 40px;
    background-color: var(--white-color);
    border-radius: var(--border-radius);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.login-form h2 {
    text-align: center;
    margin-bottom: 30px;
}

.btn-login {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: var(--border-radius);
    background-color: var(--primary-color);
    color: var(--white-color);
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s;
}

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

.form-error {
    background-color: #fbe9e7;
    color: var(--danger-color);
    padding: 10px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    text-align: center;
}

/* --- Main Admin Layout --- */
.admin-header {
    background-color: var(--secondary-color);
    color: var(--white-color);
    padding: 0 20px;
    box-shadow: var(--box-shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    height: 60px;
}

.logo {
    font-size: 1.5em;
    font-weight: bold;
}

.admin-main {
    flex: 1;
    padding: 20px;
}

.main-container {
    max-width: 1200px;
    margin: 0 auto;
}

.admin-footer {
    background-color: var(--light-gray);
    text-align: center;
    padding: 15px;
    color: var(--dark-gray);
    border-top: 1px solid var(--medium-gray);
}

/* --- Hamburger Button --- */
.hamburger-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    margin-right: 15px;
}

.hamburger-btn span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--white-color);
    margin: 5px 0;
    border-radius: 2px;
}

/* --- Slide-out Sidebar --- */
.admin-sidebar {
    height: 100%;
    width: 260px;
    position: fixed;
    z-index: 2000;
    top: 0;
    left: 0;
    background-color: var(--secondary-color);
    overflow-x: hidden;
    padding-top: 20px;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    box-shadow: 3px 0 6px rgba(0, 0, 0, 0.2);
}

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

.sidebar-header {
    padding: 0 20px 20px 20px;
    color: var(--white-color);
    font-size: 1.2em;
    border-bottom: 1px solid #4a627a;
}

.admin-sidebar ul {
    list-style: none;
    padding: 20px 0 0 0;
    margin: 0;
}

.admin-sidebar li a {
    padding: 15px 20px;
    text-decoration: none;
    font-size: 16px;
    color: var(--light-gray);
    display: block;
    transition: background-color 0.2s;
}

.admin-sidebar li a:hover,
.admin-sidebar li a.active {
    background-color: #34495e;
    color: var(--white-color);
}

.admin-sidebar li a.logout-link {
    margin-top: 20px;
    border-top: 1px solid #4a627a;
}

/* --- Sidebar Overlay --- */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

body.sidebar-active .sidebar-overlay {
    opacity: 1;
    visibility: visible;
}

/* --- General Content Styles --- */
.page-header {
    margin-bottom: 30px;
    border-bottom: 1px solid var(--medium-gray);
    padding-bottom: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.page-header h1 {
    margin: 0;
}

.page-header p {
    margin: 5px 0 0;
    color: var(--dark-gray);
}

.content-block {
    background-color: var(--white-color);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 30px;
}

.content-block h2,
.content-block h3 {
    margin-top: 0;
}

hr {
    border: 0;
    border-top: 1px solid var(--light-gray);
    margin: 30px 0;
}

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

.form-group label {
    display: block;
    font-weight: bold;
    margin-bottom: 5px;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group input[type="file"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--medium-gray);
    border-radius: var(--border-radius);
    box-sizing: border-box;
}

.form-vertical .form-group {
    grid-column: 1 / -1;
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: var(--dark-gray);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.form-group-full {
    grid-column: 1 / -1;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: var(--border-radius);
    background-color: var(--primary-color);
    color: var(--white-color);
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.2s;
}

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

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

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

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

.data-table thead th {
    background-color: #f8f9fa;
    font-weight: bold;
}

.data-table tbody tr:hover {
    background-color: #f1f1f1;
}

.crypto-icon {
    width: 32px;
    height: 32px;
    vertical-align: middle;
}

/* --- Status Badges & Action Buttons --- */
.status-badge {
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: bold;
    color: var(--white-color);
}

.status-active,
.status-paid,
.status-completed {
    background-color: var(--success-color);
}

.status-inactive,
.status-expired {
    background-color: var(--dark-gray);
}

.status-awaiting_payment,
.status-pending {
    background-color: var(--warning-color);
}

.action-links a {
    margin-right: 10px;
}

.btn-action {
    padding: 5px 10px;
    font-size: 14px;
    color: var(--white-color);
    border-radius: var(--border-radius);
    display: inline-block;
    margin-bottom: 5px;
}

.btn-toggle {
    background-color: var(--warning-color);
}

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

/* --- ALERTS --- */
.alert {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: var(--border-radius);
    border: 1px solid transparent;
}

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

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

/* --- Dashboard --- */
.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background-color: var(--white-color);
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: center;
}

.stat-card h3 {
    margin: 0 0 10px 0;
}

.stat-number {
    font-size: 2.5em;
    font-weight: bold;
    color: var(--primary-color);
    margin: 10px 0;
}

.stat-card a {
    display: inline-block;
    margin-top: 15px;
    font-weight: bold;
}

/* --- Pagination --- */
.pagination {
    margin-top: 20px;
}

.pagination a {
    margin: 0 5px;
    padding: 8px 12px;
    border: 1px solid var(--medium-gray);
    border-radius: var(--border-radius);
}

.pagination a.active {
    background-color: var(--primary-color);
    color: var(--white-color);
    border-color: var(--primary-color);
}

/* --- Edit/Delete/View Buttons --- */
.btn-edit {
    background-color: var(--primary-color);
}

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

.btn.btn-secondary {
    background-color: var(--medium-gray);
    margin-left: 10px;
}

.btn.btn-secondary:hover {
    background-color: var(--dark-gray);
}

/* --- NEW STYLE for Cache Page Button --- */
.btn.btn-warning {
    background-color: var(--warning-color);
}

.btn.btn-warning:hover {
    background-color: #e67e22;
}