/* ==========================================================
   MMVPN Admin Design System & Stylesheet
   Theme: Commercial Modern Emerald / Mint Green
   Palette:
     Primary: #10B981 (Emerald)
     Primary Dark: #059669
     Primary Hover: #047857
     Background: #F8FAFC
     Surface/Cards: #FFFFFF
     Border: #E2E8F0
     Text Main: #0F172A
     Text Muted: #64748B
     Success: #10B981, Danger: #EF4444, Warning: #F59E0B, Info: #3B82F6
   ========================================================== */

:root {
    --primary: #10B981;
    --primary-light: #D1FAE5;
    --primary-dark: #059669;
    --primary-hover: #047857;
    --bg-main: #F8FAFC;
    --bg-card: #FFFFFF;
    --border-color: #E2E8F0;
    --text-main: #0F172A;
    --text-muted: #64748B;
    --text-light: #94A3B8;
    --danger: #EF4444;
    --danger-light: #FEE2E2;
    --warning: #F59E0B;
    --warning-light: #FEF3C7;
    --info: #3B82F6;
    --info-light: #DBEAFE;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

body {
    font-family: var(--font-stack);
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Layout Architecture */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: #0F172A;
    color: #F8FAFC;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    border-right: 1px solid #1E293B;
    transition: all 0.3s ease;
}

.sidebar-brand {
    padding: 20px 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.25rem;
    font-weight: 700;
    color: #FFFFFF;
    border-bottom: 1px solid #1E293B;
}

.brand-icon {
    width: 34px;
    height: 34px;
    background: linear-gradient(135deg, #10B981, #059669);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FFFFFF;
    font-size: 1.1rem;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.4);
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    overflow-y: auto;
}

.nav-group-title {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #64748B;
    padding: 12px 14px 6px;
    font-weight: 600;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    color: #94A3B8;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    margin-bottom: 4px;
    transition: all 0.15s ease-in-out;
}

.nav-link:hover {
    background: #1E293B;
    color: #FFFFFF;
}

.nav-link.active {
    background: linear-gradient(90deg, rgba(16, 185, 129, 0.15), rgba(16, 185, 129, 0.05));
    color: #10B981;
    font-weight: 600;
    border-left: 3px solid #10B981;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

/* Navbar */
.top-navbar {
    height: 68px;
    background: #FFFFFF;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 28px;
    position: sticky;
    top: 0;
    z-index: 40;
}

.page-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
}

.nav-user-meta {
    display: flex;
    align-items: center;
    gap: 16px;
}

.badge-role {
    font-size: 0.75rem;
    padding: 4px 10px;
    background: var(--primary-light);
    color: var(--primary-dark);
    border-radius: var(--radius-full);
    font-weight: 600;
}

/* Page Body Container */
.content-body {
    padding: 28px;
    flex: 1;
}

/* Cards & Statistics */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 28px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 22px;
    box-shadow: var(--shadow-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-main);
    margin-top: 4px;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
}

.icon-green  { background: var(--primary-light); color: var(--primary); }
.icon-blue   { background: var(--info-light); color: var(--info); }
.icon-amber  { background: var(--warning-light); color: var(--warning); }
.icon-red    { background: var(--danger-light); color: var(--danger); }

/* Card Containers */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: 28px;
    overflow: hidden;
}

.card-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #FCFDFD;
}

.card-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-main);
}

.card-body {
    padding: 24px;
}

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

.custom-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    text-align: left;
}

.custom-table th {
    background: #F8FAFC;
    padding: 12px 18px;
    font-weight: 600;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.custom-table td {
    padding: 14px 18px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
    vertical-align: middle;
}

.custom-table tr:hover {
    background: #F1F5F9;
}

/* Status Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-active, .badge-online, .badge-approved {
    background: var(--primary-light);
    color: var(--primary-dark);
}

.badge-pending, .badge-maintenance {
    background: var(--warning-light);
    color: #B45309;
}

.badge-rejected, .badge-offline, .badge-expired, .badge-banned {
    background: var(--danger-light);
    color: #B91C1C;
}

/* Action Icon Buttons */
.action-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background: #FFFFFF;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-icon:hover {
    background: var(--bg-main);
    color: var(--text-main);
}

.btn-icon.view:hover   { color: var(--info); border-color: var(--info); background: var(--info-light); }
.btn-icon.edit:hover   { color: var(--warning); border-color: var(--warning); background: var(--warning-light); }
.btn-icon.delete:hover { color: var(--danger); border-color: var(--danger); background: var(--danger-light); }
.btn-icon.shield       { color: #6366F1; border-color: #E0E7FF; background: #EEF2FF; }
.btn-icon.shield:hover { color: #4338CA; border-color: #6366F1; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 9px 18px;
    font-size: 0.88rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s ease;
}

.btn-primary {
    background: var(--primary);
    color: #FFFFFF;
    box-shadow: 0 2px 4px rgba(16, 185, 129, 0.2);
}

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

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

.btn-outline:hover {
    background: var(--bg-main);
}

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

.btn-danger:hover {
    background: #DC2626;
}

/* Forms & Inputs */
.form-group {
    margin-bottom: 18px;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-main);
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: #FFFFFF;
    color: var(--text-main);
    outline: none;
    transition: border-color 0.15s;
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

/* Search Bar Component */
.search-box {
    position: relative;
    max-width: 320px;
}

.search-box input {
    padding-left: 36px;
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
    pointer-events: none;
}

/* Modal Dialog */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.6);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(2px);
}

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

.modal-dialog {
    background: #FFFFFF;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 520px;
    width: 90%;
    overflow: hidden;
}

.modal-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    background: #F8FAFC;
}

/* Auth Pages (Login & 2FA) */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at top right, #D1FAE5, #F8FAFC 60%);
    padding: 20px;
}

.auth-card {
    background: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 36px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-lg);
}

.auth-header {
    text-align: center;
    margin-bottom: 28px;
}

.auth-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
    margin-top: 12px;
}

.auth-subtitle {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Alert Messages */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-md);
    margin-bottom: 18px;
    font-size: 0.88rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-danger  { background: var(--danger-light); color: #B91C1C; border: 1px solid #FECACA; }
.alert-success { background: var(--primary-light); color: var(--primary-dark); border: 1px solid #A7F3D0; }
.alert-warning { background: var(--warning-light); color: #B45309; border: 1px solid #FDE68A; }

/* Responsive adjustments */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: -260px;
        top: 0;
        bottom: 0;
        z-index: 50;
    }
    .sidebar.open {
        left: 0;
    }
}