/* ==========================================================================
   1NESHOP PORTAL - 100% PURE CSS STYLESHEET
   COMPLETELY JAVASCRIPT-FREE
   Features:
   - Pure HTML/CSS Sidebar with expandable dropdown menus (<details>/<summary>)
   - Pure CSS responsive mobile navigation drawer (checkbox hack)
   - Dynamic, customizable data tables with responsive wrapper
   - Clean, modern Admin Dashboard layout
   - High accessibility and zero script dependencies
   ========================================================================== */

/* Dark Mode Emerald Green by Default */
:root {
    --primary: #10b981;             /* Vibrant Emerald Green */
    --primary-hover: #059669;       /* Deep Forest Green */
    --primary-light: rgba(16, 185, 129, 0.15);
    --secondary: #64748b;
    --sidebar-bg: #060a12;          /* Ultra Deep Obsidian */
    --sidebar-text: #94a3b8;
    --sidebar-hover: #0f1826;
    --sidebar-active: #09261c;      /* Deep green active highlight */
    --bg-main: #090e17;             /* Midnight Charcoal */
    --card-bg: #111827;             /* Obsidian Slate */
    --text-main: #f8fafc;           /* Crisp White-Silver */
    --text-muted: #94a3b8;
    --border: #1e293b;              /* Clean Dark Border */
    --border-hover: #10b981;        /* Glowing Green Border */
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.18);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.18);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.18);
    --radius: 8px;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.45);
}

/* Light Mode Override (When user toggles to Light) */
:root[data-theme="light"],
[data-theme="light"],
body.theme-light {
    --primary: #10b981;
    --primary-hover: #059669;
    --primary-light: #ecfdf5;
    --secondary: #475569;
    --sidebar-bg: #0f172a;
    --sidebar-text: #cbd5e1;
    --sidebar-hover: #1e293b;
    --sidebar-active: #334155;
    --bg-main: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --border-hover: #10b981;
    --success: #10b981;
    --success-bg: #dcfce7;
    --warning: #d97706;
    --warning-bg: #fef3c7;
    --danger: #dc2626;
    --danger-bg: #fee2e2;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

/* Explicit Dark Mode Selectors (matching :root) */
:root[data-theme="dark"],
[data-theme="dark"],
body.theme-dark {
    --primary: #10b981;
    --primary-hover: #059669;
    --primary-light: rgba(16, 185, 129, 0.15);
    --secondary: #64748b;
    --sidebar-bg: #060a12;
    --sidebar-text: #94a3b8;
    --sidebar-hover: #0f1826;
    --sidebar-active: #09261c;
    --bg-main: #090e17;
    --card-bg: #111827;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border: #1e293b;
    --border-hover: #10b981;
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.18);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.18);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.18);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.45);
}

[data-theme="dark"] .brand-icon {
    background: linear-gradient(135deg, #10b981, #047857) !important;
    box-shadow: 0 0 15px rgba(16, 185, 129, 0.45) !important;
}

[data-theme="dark"] .main-header {
    background-color: #0b121e !important;
    border-color: #1e293b !important;
}

[data-theme="dark"] .table-card {
    background-color: #111827 !important;
    border-color: #1e293b !important;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.35) !important;
}

[data-theme="dark"] .table-toolbar {
    background-color: #0c1422 !important;
    border-color: #1e293b !important;
}

[data-theme="dark"] .custom-table th {
    background-color: #0a111c !important;
    color: #34d399 !important;
    border-color: #1e293b !important;
    font-weight: 700;
}

[data-theme="dark"] .custom-table td {
    color: #cbd5e1 !important;
    border-color: #1e293b !important;
}

[data-theme="dark"] .custom-table tbody tr:hover {
    background-color: #142033 !important;
}

[data-theme="dark"] .custom-table tr:nth-child(even) {
    background-color: #0e1624 !important;
}

[data-theme="dark"] .search-input,
[data-theme="dark"] .form-control,
[data-theme="dark"] input[type="text"],
[data-theme="dark"] input[type="password"],
[data-theme="dark"] input[type="email"],
[data-theme="dark"] input[type="number"],
[data-theme="dark"] select,
[data-theme="dark"] textarea {
    background-color: #080d16 !important;
    border-color: #1e293b !important;
    color: #f8fafc !important;
}

[data-theme="dark"] .search-input:focus,
[data-theme="dark"] .form-control:focus,
[data-theme="dark"] input:focus,
[data-theme="dark"] select:focus,
[data-theme="dark"] textarea:focus {
    border-color: #10b981 !important;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.25) !important;
}

[data-theme="dark"] .admin-card {
    background-color: #111827 !important;
    border-color: #1e293b !important;
    color: #f8fafc !important;
}

[data-theme="dark"] .btn-secondary {
    background-color: #192334 !important;
    border-color: #24344d !important;
    color: #cbd5e1 !important;
}

[data-theme="dark"] .btn-secondary:hover {
    background-color: #24344d !important;
    color: #ffffff !important;
    border-color: #10b981 !important;
}

[data-theme="dark"] .nav-link {
    color: #94a3b8;
}

[data-theme="dark"] .nav-link:hover,
[data-theme="dark"] details.nav-dropdown summary:hover,
[data-theme="dark"] .dropdown-item:hover {
    background-color: #0f1929 !important;
    color: #34d399 !important;
}

[data-theme="dark"] .nav-link.active {
    background-color: #10b981 !important;
    color: #ffffff !important;
}

[data-theme="dark"] .dropdown-item.active {
    background-color: rgba(16, 185, 129, 0.2) !important;
    color: #34d399 !important;
    border-left: 2px solid #10b981 !important;
}

[data-theme="dark"] .badge-secondary {
    background-color: #1e293b !important;
    color: #94a3b8 !important;
}

[data-theme="dark"] .badge-info {
    background-color: rgba(16, 185, 129, 0.15) !important;
    color: #34d399 !important;
}

[data-theme="dark"] .badge-success {
    background-color: rgba(16, 185, 129, 0.2) !important;
    color: #34d399 !important;
    border: 1px solid rgba(16, 185, 129, 0.35) !important;
}

[data-theme="dark"] .crypto-option-card {
    background-color: #111827 !important;
    border-color: #1e293b !important;
}

[data-theme="dark"] .crypto-option-card:hover {
    border-color: #10b981 !important;
    background-color: #142033 !important;
}

[data-theme="dark"] .crypto-option-card:has(input[type="radio"]:checked) {
    border-color: #10b981 !important;
    background-color: rgba(16, 185, 129, 0.12) !important;
    box-shadow: 0 0 0 1px #10b981 !important;
}

[data-theme="dark"] .crypto-address-box {
    background-color: #070d16 !important;
    border-color: #1e293b !important;
    color: #34d399 !important;
}

[data-theme="dark"] .preset-link {
    background-color: #111827 !important;
    border-color: #1e293b !important;
    color: #cbd5e1 !important;
}

[data-theme="dark"] .preset-link:hover {
    border-color: #10b981 !important;
    color: #10b981 !important;
    background-color: #142033 !important;
}

[data-theme="dark"] .preset-link.active {
    background-color: #10b981 !important;
    border-color: #10b981 !important;
    color: #ffffff !important;
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.4) !important;
}

[data-theme="dark"] .crypto-invoice-card {
    background-color: #111827 !important;
    border-color: #1e293b !important;
}

/* Theme Toggle Button */
.btn-theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.32rem 0.75rem;
    font-size: 0.78rem;
    font-weight: 700;
    text-decoration: none;
    border-radius: 9999px;
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--text-main);
    transition: all 0.2s ease;
    cursor: pointer;
    white-space: nowrap;
}

.btn-theme-toggle:hover {
    border-color: #10b981;
    color: #10b981;
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.3);
}

[data-theme="dark"] .btn-theme-toggle {
    background-color: #0c1422;
    border-color: #1e293b;
    color: #34d399;
}

[data-theme="dark"] .btn-theme-toggle:hover {
    background-color: #102520;
    border-color: #10b981;
    color: #6ee7b7;
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.4);
}

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

html {
    background-color: var(--bg-main);
    color: var(--text-main);
    color-scheme: dark light;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ==========================================================================
   PURE CSS MOBILE NAV TOGGLE (CHECKBOX HACK)
   ========================================================================== */
#nav-toggle {
    display: none;
}

.mobile-header {
    display: none;
    background-color: var(--sidebar-bg);
    color: #ffffff;
    padding: 0.85rem 1.25rem;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.nav-toggle-label {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    width: 28px;
    height: 22px;
    cursor: pointer;
}

.nav-toggle-label span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: #ffffff;
    border-radius: 2px;
    transition: 0.2s ease-in-out;
}

/* ==========================================================================
   PAGE LAYOUT
   ========================================================================== */
.layout-container {
    display: flex;
    min-height: 100vh;
    width: 100%;
}

/* ==========================================================================
   SIDEBAR & DROPDOWN NAVIGATION (PURE CSS & DETAILS/SUMMARY)
   ========================================================================== */
.sidebar {
    width: 280px;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 90;
    border-right: 1px solid #1e293b;
}

.sidebar-brand {
    padding: 1.5rem 1.25rem;
    border-bottom: 1px solid #1e293b;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.sidebar-brand h1 {
    font-size: 1.2rem;
    color: #ffffff;
    font-weight: 700;
    letter-spacing: -0.025em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-brand a {
    color: inherit;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.brand-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, #2563eb, #38bdf8);
    color: #ffffff;
    font-weight: bold;
    border-radius: 6px;
    font-size: 0.95rem;
}

.sidebar-nav {
    padding: 1rem 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    flex-grow: 1;
}

.nav-section-title {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #64748b;
    font-weight: 700;
    padding: 0.75rem 0.5rem 0.25rem 0.5rem;
}

/* Static Link */
.nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.65rem 0.75rem;
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius);
    transition: background-color 0.15s, color 0.15s;
}

.nav-link:hover {
    background-color: var(--sidebar-hover);
    color: #ffffff;
}

.nav-link.active {
    background-color: var(--primary);
    color: #ffffff;
}

/* Pure HTML5 Dropdown Navigation via <details> and <summary> */
details.nav-dropdown {
    width: 100%;
}

details.nav-dropdown summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.65rem 0.75rem;
    color: var(--sidebar-text);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius);
    transition: background-color 0.15s, color 0.15s;
    user-select: none;
}

/* Hide native browser arrow */
details.nav-dropdown summary::-webkit-details-marker {
    display: none;
}

details.nav-dropdown summary:hover {
    background-color: var(--sidebar-hover);
    color: #ffffff;
}

/* Custom CSS Chevron Arrow that animates on open */
details.nav-dropdown summary .dropdown-chevron {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-right: 2px solid #94a3b8;
    border-bottom: 2px solid #94a3b8;
    transform: rotate(-45deg);
    transition: transform 0.2s ease;
}

details.nav-dropdown[open] summary .dropdown-chevron {
    transform: rotate(45deg);
    border-color: #ffffff;
}

/* Dropdown Sub-menu Container */
.dropdown-menu {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 0.35rem 0 0.35rem 1.25rem;
    border-left: 2px solid #1e293b;
    margin: 0.25rem 0 0.5rem 0.75rem;
}

.dropdown-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.45rem 0.65rem;
    color: #94a3b8;
    font-size: 0.85rem;
    text-decoration: none;
    border-radius: var(--radius);
    transition: background-color 0.15s, color 0.15s;
}

.dropdown-item:hover {
    background-color: var(--sidebar-hover);
    color: #ffffff;
}

.dropdown-item.active {
    background-color: rgba(37, 99, 235, 0.25);
    color: #60a5fa;
    font-weight: 600;
}

.dropdown-item.dropdown-subitem {
    font-size: 0.82rem;
    padding-left: 1.75rem;
    color: #94a3b8;
    border-left: 2px solid rgba(16, 185, 129, 0.35);
}

.dropdown-item.dropdown-subitem:hover {
    color: #34d399;
    border-left-color: #10b981;
    background-color: rgba(16, 185, 129, 0.12);
}

.dropdown-item.dropdown-subitem.active {
    background-color: rgba(16, 185, 129, 0.2) !important;
    color: #34d399 !important;
    border-left-color: #10b981 !important;
    font-weight: 700;
}

.subcategory-nav-card {
    transition: all 0.2s ease;
}

[data-theme="dark"] .subcategory-nav-card {
    background: #0d1527 !important;
    border-color: #1e293b !important;
}

.ext-badge {
    font-size: 0.65rem;
    background: rgba(255, 255, 255, 0.1);
    color: #cbd5e1;
    padding: 2px 6px;
    border-radius: 4px;
    text-transform: uppercase;
}

/* Sidebar Footer / Admin Entry */
.sidebar-footer {
    padding: 1rem 0.75rem;
    border-top: 1px solid #1e293b;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.btn-admin-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: #1e293b;
    color: #cbd5e1;
    text-decoration: none;
    padding: 0.6rem;
    border-radius: var(--radius);
    font-size: 0.85rem;
    font-weight: 600;
    transition: background 0.15s;
}

.btn-admin-link:hover {
    background-color: #334155;
    color: #ffffff;
}

/* ==========================================================================
   MAIN CONTENT AREA
   ========================================================================== */
.main-wrapper {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    background-color: var(--bg-main);
}

.main-header {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: 1.5rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.category-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: -0.025em;
}

.category-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.content-body {
    padding: 2rem;
    flex-grow: 1;
}

/* ==========================================================================
   DATA TABLE TEMPLATE (ADJUSTABLE, RESPONSIVE, STYLED)
   ========================================================================== */
.table-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.table-toolbar {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    background-color: var(--card-bg);
}

.table-search-form {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.search-input {
    padding: 0.5rem 0.85rem;
    font-size: 0.875rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    outline: none;
    min-width: 240px;
    background-color: #080d16;
    color: var(--text-main);
}

[data-theme="light"] .search-input {
    background-color: #ffffff;
    color: #0f172a;
}

.search-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.25);
}

.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.custom-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.9rem;
    background-color: var(--card-bg);
}

.custom-table th {
    background-color: #0a111c;
    color: #34d399;
    font-weight: 700;
    padding: 0.85rem 1rem;
    border-bottom: 2px solid var(--border);
    white-space: nowrap;
}

[data-theme="light"] .custom-table th {
    background-color: #f1f5f9;
    color: #475569;
}

.custom-table td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-main);
    vertical-align: middle;
}

.custom-table tbody tr:last-child td {
    border-bottom: none;
}

.custom-table tbody tr:hover {
    background-color: rgba(16, 185, 129, 0.08);
}

.custom-table tr:nth-child(even) {
    background-color: rgba(255, 255, 255, 0.02);
}

[data-theme="light"] .custom-table tr:nth-child(even) {
    background-color: #f8fafc;
}

/* Badges for status columns */
.badge {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 9999px;
    text-align: center;
    background-color: #e2e8f0;
    color: #475569;
}

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

.badge-warning {
    background-color: var(--warning-bg);
    color: var(--warning);
}

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

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

/* Empty State */
.table-empty {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--text-muted);
}

.table-empty p {
    margin-top: 0.5rem;
    font-size: 0.95rem;
}

/* ==========================================================================
   BUTTONS & FORMS
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.55rem 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s ease-in-out;
}

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

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

.btn-secondary {
    background-color: #192334;
    border-color: var(--border);
    color: var(--text-main);
}

.btn-secondary:hover {
    background-color: #24344d;
    border-color: #10b981;
    color: #ffffff;
}

[data-theme="light"] .btn-secondary {
    background-color: #ffffff;
    border-color: var(--border);
    color: var(--text-main);
}

[data-theme="light"] .btn-secondary:hover {
    background-color: #f1f5f9;
}

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

.btn-danger:hover {
    background-color: #b91c1c;
}

.btn-sm {
    padding: 0.35rem 0.65rem;
    font-size: 0.8rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.4rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-main);
}

.form-control {
    width: 100%;
    padding: 0.65rem 0.85rem;
    font-size: 0.9rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    outline: none;
    background-color: #080d16;
    color: var(--text-main);
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.25);
    background-color: #080d16;
}

[data-theme="light"] .form-control {
    background-color: #ffffff;
    color: #0f172a;
}

[data-theme="light"] .form-control:focus {
    background-color: #ffffff;
}

.form-help {
    font-size: 0.775rem;
    color: var(--text-muted);
    margin-top: 0.3rem;
}

/* Alerts */
.alert {
    padding: 0.85rem 1.25rem;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.alert-success {
    background-color: var(--success-bg);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.35);
}

[data-theme="light"] .alert-success {
    color: #14532d;
    border-color: #bbf7d0;
}

.alert-danger {
    background-color: var(--danger-bg);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.35);
}

[data-theme="light"] .alert-danger {
    color: #7f1d1d;
    border-color: #fecaca;
}

/* ==========================================================================
   ADMIN DASHBOARD SECTION TABS & CARDS
   ========================================================================== */
.admin-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.admin-card {
    background: var(--card-bg);
    color: var(--text-main);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.admin-card h2 {
    font-size: 1.15rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.admin-nav-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.5rem;
    flex-wrap: wrap;
}

.admin-tab {
    padding: 0.5rem 1rem;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-muted);
    border-radius: var(--radius);
    transition: all 0.15s;
}

.admin-tab:hover {
    background-color: #f1f5f9;
    color: var(--text-main);
}

.admin-tab.active {
    background-color: var(--primary);
    color: #ffffff;
}

/* Database provider selector pills */
.db-pill {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
    border: 1px solid var(--border);
    background: #f8fafc;
}

.db-pill-supabase {
    color: #10b981;
    border-color: #10b981;
}

.db-pill-aws {
    color: #f59e0b;
    border-color: #f59e0b;
}

.db-pill-alibaba {
    color: #ff6a00;
    border-color: #ff6a00;
}

/* ==========================================================================
   RESPONSIVE DESIGN (MOBILE & TABLET)
   ========================================================================== */
@media (max-width: 900px) {
    .mobile-header {
        display: flex;
    }

    .layout-container {
        flex-direction: column;
    }

    .sidebar {
        position: fixed;
        left: -300px;
        top: 53px;
        height: calc(100vh - 53px);
        width: 280px;
        transition: left 0.3s ease;
        box-shadow: 4px 0 10px rgba(0,0,0,0.2);
    }

    /* When mobile checkbox is checked, slide sidebar in (Zero JS!) */
    #nav-toggle:checked ~ .layout-container .sidebar {
        left: 0;
    }

    #nav-toggle:checked ~ .mobile-header .nav-toggle-label span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    #nav-toggle:checked ~ .mobile-header .nav-toggle-label span:nth-child(2) {
        opacity: 0;
    }

    #nav-toggle:checked ~ .mobile-header .nav-toggle-label span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .main-header {
        padding: 1rem 1.25rem;
    }

    .content-body {
        padding: 1.25rem;
    }
}

/* ==========================================================================
   CRYPTO PAYMENTS & WALLET STYLING (100% PURE CSS - ZERO JAVASCRIPT)
   ========================================================================== */
.crypto-selection-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}
.crypto-option-card {
    border: 2px solid var(--border);
    border-radius: 8px;
    padding: 0.85rem;
    cursor: pointer;
    background: var(--card-bg);
    color: var(--text-main);
    transition: all 0.15s ease;
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;
}
.crypto-option-card:hover {
    border-color: var(--primary);
    background: #142033;
}
[data-theme="light"] .crypto-option-card:hover {
    background: #f8fafc;
}
.crypto-option-card:has(input[type="radio"]:checked) {
    border-color: var(--primary);
    background: rgba(16, 185, 129, 0.12);
    box-shadow: 0 0 0 1px var(--primary);
}
.crypto-coin-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 800;
    flex-shrink: 0;
    color: #ffffff;
}
.crypto-address-box {
    background: #070d16;
    color: #34d399;
    padding: 0.85rem 1rem;
    border-radius: 8px;
    word-break: break-all;
    font-size: 0.95rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    border: 1px solid var(--border);
    margin: 0.75rem 0;
    letter-spacing: 0.02em;
    user-select: all;
}
.crypto-invoice-card {
    background: var(--card-bg);
    color: var(--text-main);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.75rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}
.crypto-invoice-grid {
    display: grid;
    grid-template-columns: 1fr 260px;
    gap: 2rem;
    align-items: center;
}
@media (max-width: 768px) {
    .crypto-invoice-grid {
        grid-template-columns: 1fr;
    }
}

.preset-pills {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 0.75rem;
}
.preset-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.55rem 1.15rem;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-main);
    background: var(--card-bg);
    border: 2px solid var(--border);
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.15s ease;
}
.preset-link:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: #142033;
}
[data-theme="light"] .preset-link:hover {
    background: #f8fafc;
}
.preset-link.active {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.4);
}