/* ============================================================
   WHM Notifier - Premium Dark Mode Design System
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ---- CSS Variables ---- */
:root {
    --bg-base: #13141f;
    --bg-surface: #1e202f;
    --bg-surface-2: #24273d;
    --bg-card: rgba(30, 32, 50, 0.9);
    --bg-card-hover: rgba(40, 42, 65, 0.95);
    --bg-input: #13141f;
    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);

    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-heading: #ffffff;

    --accent: #6366f1;
    --accent-hover: #818cf8;
    --accent-glow: rgba(99, 102, 241, 0.3);
    --accent-gradient: linear-gradient(135deg, #6366f1, #8b5cf6);

    --success: #22c55e;
    --success-bg: rgba(34, 197, 94, 0.1);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.1);
    --info: #3b82f6;
    --info-bg: rgba(59, 130, 246, 0.1);

    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 30px var(--accent-glow);

    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;
}

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

html {
    font-size: 15px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; transition: var(--transition-fast); }
a:hover { color: var(--accent-hover); }

/* ---- Layout ---- */
.app-wrapper {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--bg-surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-heading);
}

.sidebar-logo .logo-icon {
    width: 36px;
    height: 36px;
    background: var(--accent-gradient);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    box-shadow: var(--shadow-glow);
}

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

.nav-section {
    margin-bottom: 24px;
}

.nav-section-title {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    padding: 0 12px;
    margin-bottom: 8px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-fast);
    margin-bottom: 2px;
}

.nav-link:hover {
    background: rgba(99, 102, 241, 0.08);
    color: var(--text-primary);
}

.nav-link.active {
    background: var(--accent-gradient);
    color: #fff;
    box-shadow: var(--shadow-glow);
}

.nav-link .nav-icon { font-size: 1.1rem; width: 22px; text-align: center; }

.nav-badge {
    margin-left: auto;
    background: var(--danger);
    color: #fff;
    font-size: 0.65rem;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: 50px;
    min-width: 20px;
    text-align: center;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border);
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    min-height: 100vh;
}

.page-header {
    padding: 24px 32px;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(12px);
}

.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-heading);
}

.page-subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.page-body {
    padding: 28px 32px;
}

/* ---- Cards ---- */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-heading);
}

/* Animations */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
.fade-up {
    opacity: 0;
    animation: fadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Welcome Banner */
.welcome-banner {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(139, 92, 246, 0.15) 100%);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: var(--radius-lg);
    padding: 32px 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-glow);
}
.welcome-banner::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%236366f1' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
    z-index: 0;
}
.welcome-banner > div {
    position: relative;
    z-index: 1;
}
.banner-illustration {
    font-size: 4.5rem;
    filter: drop-shadow(0 0 20px rgba(99, 102, 241, 0.4));
    animation: float 4s ease-in-out infinite;
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 28px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 22px 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    border-color: var(--border-hover);
}

.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.stat-icon.blue { background: var(--info-bg); color: var(--info); }
.stat-icon.green { background: var(--success-bg); color: var(--success); }
.stat-icon.yellow { background: var(--warning-bg); color: var(--warning); }
.stat-icon.red { background: var(--danger-bg); color: var(--danger); }
.stat-icon.purple { background: rgba(139, 92, 246, 0.1); color: #8b5cf6; }

.stat-value {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-heading);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Server Cards Grid */
.server-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 20px;
}

.server-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.server-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-gradient);
    opacity: 0;
    transition: opacity 0.3s;
}

.server-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.server-card:hover::before { opacity: 1; }

.server-card.status-ok { border-left: 3px solid var(--success); }
.server-card.status-warning { border-left: 3px solid var(--warning); }
.server-card.status-error { border-left: 3px solid var(--danger); }
.server-card.status-unknown { border-left: 3px solid var(--text-muted); }

.server-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 4px;
}

.server-host {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: 'SF Mono', 'Consolas', monospace;
    margin-bottom: 16px;
}

.server-metrics {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 12px;
}

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

.metric-value {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-heading);
}

.metric-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.server-footer {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* Status Dot */
.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 6px;
}

.status-dot.online { background: var(--success); box-shadow: 0 0 8px rgba(34, 197, 94, 0.5); }
.status-dot.warning { background: var(--warning); box-shadow: 0 0 8px rgba(245, 158, 11, 0.5); }
.status-dot.offline { background: var(--danger); box-shadow: 0 0 8px rgba(239, 68, 68, 0.5); animation: pulse-dot 1.5s infinite; }
.status-dot.unknown { background: var(--text-muted); }

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* ---- Tables ---- */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius);
}

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

table th {
    text-align: left;
    padding: 12px 16px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--border);
}

table td {
    padding: 12px 16px;
    font-size: 0.88rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
}

table tbody tr { transition: var(--transition-fast); }
table tbody tr:hover { background: rgba(99, 102, 241, 0.04); }

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    border: 1px solid transparent;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: #fff;
    box-shadow: 0 2px 10px var(--accent-glow);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 20px var(--accent-glow); color: #fff; }

.btn-secondary {
    background: transparent;
    color: var(--text-secondary);
    border-color: var(--border);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; color: #fff; }

.btn-success { background: var(--success); color: #fff; }
.btn-sm { padding: 6px 14px; font-size: 0.8rem; }
.btn-icon { padding: 8px; width: 36px; height: 36px; justify-content: center; }

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

.form-label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    transition: var(--transition-fast);
    outline: none;
}

.form-control:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-control::placeholder { color: var(--text-muted); }

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

textarea.form-control { resize: vertical; min-height: 80px; }

/* ---- Badges ---- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 50px;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.badge-success { background: var(--success-bg); color: var(--success); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-info { background: var(--info-bg); color: var(--info); }
.badge-muted { background: rgba(100, 116, 139, 0.15); color: var(--text-muted); }

/* ---- Progress Bar ---- */
.progress {
    height: 6px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 50px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    border-radius: 50px;
    transition: width 0.6s ease;
    background: var(--accent-gradient);
}

.progress-bar.green { background: var(--success); }
.progress-bar.yellow { background: var(--warning); }
.progress-bar.red { background: var(--danger); }

/* ---- Alerts / Toasts ---- */
.alert-box {
    padding: 14px 20px;
    border-radius: var(--radius);
    border-left: 4px solid;
    margin-bottom: 16px;
    font-size: 0.88rem;
}

.alert-box.success { background: var(--success-bg); border-color: var(--success); color: var(--success); }
.alert-box.warning { background: var(--warning-bg); border-color: var(--warning); color: var(--warning); }
.alert-box.danger { background: var(--danger-bg); border-color: var(--danger); color: var(--danger); }
.alert-box.info { background: var(--info-bg); border-color: var(--info); color: var(--info); }

.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 20px;
    min-width: 300px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ---- Modal ---- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

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

.modal {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    width: 95%;
    max-width: 850px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    transform: scale(0.95);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal { transform: scale(1); }

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title { font-size: 1.1rem; font-weight: 600; color: var(--text-heading); }
.modal-close { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 1.3rem; padding: 4px; }
.modal-close:hover { color: var(--text-primary); }
.modal-body { padding: 24px; }
.modal-footer { padding: 16px 24px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 10px; }

/* ---- Login Page ---- */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-base);
    background-image: radial-gradient(ellipse at 50% 0%, rgba(99, 102, 241, 0.08) 0%, transparent 60%);
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 40px;
    width: 100%;
    max-width: 420px;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-lg);
}

.login-card h1 {
    text-align: center;
    font-size: 1.6rem;
    margin-bottom: 8px;
    color: var(--text-heading);
}

.login-card .subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.88rem;
    margin-bottom: 32px;
}

.login-card .btn-primary { width: 100%; justify-content: center; padding: 12px; }

/* ---- Empty State ---- */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state .empty-icon { font-size: 3rem; margin-bottom: 16px; opacity: 0.5; }
.empty-state h3 { font-size: 1.1rem; color: var(--text-secondary); margin-bottom: 8px; }
.empty-state p { font-size: 0.88rem; margin-bottom: 20px; }

/* ---- Utility ---- */
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.text-right { text-align: right; }
.text-center { text-align: center; }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }
.text-muted { color: var(--text-muted); }
.font-mono { font-family: 'SF Mono', 'Consolas', monospace; }

/* ---- Responsive ---- */
@media (max-width: 1024px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .page-body { padding: 20px 16px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .server-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
    .stats-grid { grid-template-columns: 1fr; }
    .page-header { padding: 16px; }
    .page-title { font-size: 1.2rem; }
}