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

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

:root {
    --primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-solid: #667eea;
    --primary-dark: #5a67d8;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    --secondary: #6b7280;
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border: #334155;
    --shadow: 0 10px 30px rgba(0,0,0,0.3);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.2);
}

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

/* ==================== NAVBAR ==================== */

.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.nav-brand {
    font-size: 1.4rem;
    font-weight: 700;
    background: var(--primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

.nav-links {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.btn-logout {
    background: rgba(239,68,68,0.1) !important;
    color: var(--danger) !important;
}

/* ==================== CONTAINER ==================== */

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.page-header h1 {
    font-size: 2rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.page-header p { color: var(--text-muted); margin-top: 0.25rem; }

.breadcrumb { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 0.25rem; }
.breadcrumb a { color: var(--text-secondary); text-decoration: none; }
.breadcrumb a:hover { color: var(--text-primary); }

.section { margin-bottom: 3rem; }
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
}
.section-header h2 { font-size: 1.4rem; }

/* ==================== BUTTONS ==================== */

.btn {
    padding: 0.6rem 1.25rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.9rem;
    white-space: nowrap;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.btn-secondary { background: var(--bg-tertiary); color: var(--text-primary); }
.btn-secondary:hover { background: #3d4f6a; }
.btn-warning { background: rgba(245,158,11,0.2); color: var(--warning); }
.btn-warning:hover { background: rgba(245,158,11,0.3); }
.btn-danger { background: rgba(239,68,68,0.2); color: var(--danger); }
.btn-danger:hover { background: rgba(239,68,68,0.3); }
.btn-success { background: rgba(16,185,129,0.2); color: var(--success); }
.btn-success:hover { background: rgba(16,185,129,0.3); }
.btn-sm { padding: 0.4rem 0.8rem; font-size: 0.8rem; }
.btn-block { width: 100%; justify-content: center; }

/* ==================== STATS GRID ==================== */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2.5rem;
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.25rem;
    text-align: center;
    transition: all 0.2s;
}
.stat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); }
.stat-icon { font-size: 2rem; margin-bottom: 0.35rem; }
.stat-value { font-size: 2.25rem; font-weight: 700; margin-bottom: 0.15rem; }
.stat-label { color: var(--text-muted); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.5px; }

.stat-success { border-color: var(--success); background: rgba(16,185,129,0.05); }
.stat-success .stat-value { color: var(--success); }
.stat-error { border-color: var(--danger); background: rgba(239,68,68,0.05); }
.stat-error .stat-value { color: var(--danger); }
.stat-warning { border-color: var(--warning); background: rgba(245,158,11,0.05); }
.stat-warning .stat-value { color: var(--warning); }

/* ==================== VPS SERVER HEALTH (Dashboard) ==================== */

.server-health-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.server-health-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.2s;
}
.server-health-card:hover { border-color: var(--primary-solid); }
.server-health-card.offline { opacity: 0.7; border-color: var(--danger); }

.server-health-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 0;
}
.server-health-meta {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    min-width: 0;
}
.server-health-meta code {
    font-size: 0.75rem;
    color: var(--text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.server-health-badge { flex-shrink: 0; }

/* ==================== SERVER CARDS (Servers Page) ==================== */

.servers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 1.5rem;
}

.server-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.2s;
}
.server-card:hover { border-color: var(--primary-solid); box-shadow: var(--shadow-sm); }
.server-online { border-left: 3px solid var(--success); }
.server-offline { border-left: 3px solid var(--danger); opacity: 0.8; }

.server-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    background: var(--bg-tertiary);
}
.server-card-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.server-card-title h3 { font-size: 1.1rem; }

.server-card-body { padding: 1rem 1.25rem; }
.server-detail {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
    font-size: 0.9rem;
}
.server-detail .label { color: var(--text-muted); min-width: 55px; }
.server-detail code {
    background: var(--bg-tertiary);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
}

.server-card-actions {
    display: flex;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    border-top: 1px solid var(--border);
    flex-wrap: wrap;
}

/* ==================== GROUPS GRID ==================== */

.groups-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.group-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.2s;
}
.group-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); border-color: var(--primary-solid); }

.group-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 1rem;
}
.group-header h3 { font-size: 1.2rem; font-weight: 600; }

.group-stats {
    margin-bottom: 1rem;
    padding: 0.75rem 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}
.group-stat {
    display: flex;
    justify-content: space-between;
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 0.15rem 0;
}
.group-stat .value { font-weight: 600; color: var(--text-primary); }

/* ==================== TABLE ==================== */

.table-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow-x: auto;
}

.table { width: 100%; border-collapse: collapse; }
.table thead { background: var(--bg-tertiary); }
.table th {
    padding: 0.85rem 1rem;
    text-align: left;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    white-space: nowrap;
}
.table td { padding: 0.85rem 1rem; border-top: 1px solid var(--border); }
.table tbody tr { transition: background 0.15s; }
.table tbody tr:hover { background: var(--bg-tertiary); }
.table .actions { display: flex; gap: 0.4rem; flex-wrap: wrap; }

code {
    background: var(--bg-tertiary);
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    font-size: 0.85rem;
}

/* ==================== BADGES ==================== */

.badge {
    padding: 0.2rem 0.6rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    display: inline-block;
    white-space: nowrap;
}
.badge-heroku { background: rgba(102,126,234,0.2); color: #667eea; }
.badge-vps { background: rgba(59,130,246,0.2); color: #3b82f6; }
.badge-success { background: rgba(16,185,129,0.2); color: var(--success); }
.badge-danger { background: rgba(239,68,68,0.2); color: var(--danger); }
.badge-secondary { background: rgba(107,114,128,0.2); color: var(--secondary); }
.badge-warning { background: rgba(245,158,11,0.2); color: var(--warning); }
.badge-info { background: rgba(59,130,246,0.2); color: var(--info); }

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

/* ==================== HEALTH DOT ==================== */

.health-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
    flex-shrink: 0;
}
.health-online {
    background: var(--success);
    box-shadow: 0 0 8px var(--success);
    animation: pulse 2s infinite;
}
.health-offline {
    background: var(--danger);
    box-shadow: 0 0 6px var(--danger);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ==================== CONTROL PANEL ==================== */

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

.auto-refresh-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
}
.auto-refresh-toggle input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--primary-solid);
}

.server-panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-bottom: 1.5rem;
    overflow: hidden;
}
.server-panel-offline { opacity: 0.65; border-color: var(--danger); }

.server-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
    gap: 0.75rem;
}

.server-panel-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}
.server-panel-info h3 { font-size: 1.1rem; margin: 0; }
.server-host {
    font-size: 0.75rem;
    color: var(--text-muted);
    background: rgba(255,255,255,0.05);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
}

.server-panel-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.server-panel-body { padding: 0; }
.panel-msg { padding: 1.5rem; text-align: center; }

.control-table { margin: 0; }
.control-table td, .control-table th { padding: 0.7rem 1rem; }
.path-code {
    font-size: 0.7rem;
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    display: inline-block;
}

/* ==================== ICON BUTTONS ==================== */

.btn-icon {
    width: 34px;
    height: 34px;
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
    background: var(--bg-tertiary);
    color: var(--text-primary);
}
.btn-icon:hover:not(:disabled) { transform: scale(1.1); }
.btn-icon:disabled { opacity: 0.25; cursor: not-allowed; }

.btn-start:hover:not(:disabled) { background: rgba(16,185,129,0.2); color: var(--success); border-color: var(--success); }
.btn-ctrl-restart:hover:not(:disabled) { background: rgba(245,158,11,0.2); color: var(--warning); border-color: var(--warning); }
.btn-stop:hover:not(:disabled) { background: rgba(239,68,68,0.2); color: var(--danger); border-color: var(--danger); }
.btn-unregister:hover:not(:disabled) { background: rgba(107,114,128,0.2); border-color: var(--secondary); }

/* ==================== TOAST NOTIFICATIONS ==================== */

.toast-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    pointer-events: none;
}
.toast {
    padding: 0.7rem 1.25rem;
    border-radius: 8px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    animation: slideIn 0.3s ease;
    max-width: 400px;
    font-size: 0.85rem;
    pointer-events: auto;
    transition: opacity 0.3s;
}
.toast-success { border-left: 4px solid var(--success); }
.toast-error { border-left: 4px solid var(--danger); }
.toast-info { border-left: 4px solid var(--info); }

@keyframes slideIn {
    from { opacity: 0; transform: translateX(50px); }
    to { opacity: 1; transform: translateX(0); }
}

/* ==================== LOADING ==================== */

.loading-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
}
.spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--border);
    border-top-color: var(--primary-solid);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 1rem;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ==================== MODAL ==================== */

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0; top: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(4px);
}
.modal-content {
    background: var(--bg-secondary);
    margin: 5% auto;
    border: 1px solid var(--border);
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow);
    animation: modalIn 0.25s ease;
}
@keyframes modalIn {
    from { opacity: 0; transform: translateY(-30px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.modal-header h2 { font-size: 1.3rem; font-weight: 600; }
.close {
    color: var(--text-muted);
    font-size: 1.75rem;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.2s;
    line-height: 1;
}
.close:hover { color: var(--text-primary); }
.modal-content form { padding: 1.5rem; }
.modal-footer { display: flex; justify-content: flex-end; gap: 0.75rem; margin-top: 1.25rem; }

/* ==================== FORMS ==================== */

.form-group { margin-bottom: 1.25rem; }
.form-group label {
    display: block;
    margin-bottom: 0.4rem;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.9rem;
}
.form-group input,
.form-group select {
    width: 100%;
    padding: 0.65rem 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all 0.2s;
}
.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-solid);
    box-shadow: 0 0 0 3px rgba(102,126,234,0.1);
}
.form-group small { display: block; margin-top: 0.35rem; color: var(--text-muted); font-size: 0.8rem; }

/* ==================== ALERTS ==================== */

.alert {
    padding: 0.75rem 1.25rem;
    border-radius: 8px;
    margin-bottom: 1.25rem;
    border-left: 4px solid;
    font-size: 0.9rem;
}
.alert-success { background: rgba(16,185,129,0.1); border-color: var(--success); color: var(--success); }
.alert-error { background: rgba(239,68,68,0.1); border-color: var(--danger); color: var(--danger); }

/* ==================== EMPTY STATE ==================== */

.empty-state { text-align: center; padding: 4rem 2rem; }
.empty-icon { font-size: 3.5rem; margin-bottom: 1rem; opacity: 0.5; }
.empty-state h3 { font-size: 1.4rem; margin-bottom: 0.5rem; }
.empty-state p { color: var(--text-muted); margin-bottom: 1.5rem; }
.empty-state a { color: var(--primary-solid); }

.empty-state-sm { text-align: center; padding: 2rem; color: var(--text-muted); }
.empty-state-sm a { color: var(--primary-solid); }

/* ==================== LOGIN PAGE ==================== */

.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.login-container { width: 100%; max-width: 420px; padding: 2rem; }
.login-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: var(--shadow);
}
.login-header { text-align: center; margin-bottom: 2rem; }
.login-header h1 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
    background: var(--primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.login-header p { color: var(--text-muted); }
.login-form { display: flex; flex-direction: column; gap: 0; }

/* ==================== RESPONSIVE ==================== */

@media (max-width: 768px) {
    .navbar { padding: 0.75rem 1rem; }
    .nav-toggle { display: block; }
    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        gap: 0.25rem;
        padding-top: 0.75rem;
    }
    .nav-links.open { display: flex; }
    .navbar { flex-wrap: wrap; }

    .container { padding: 1rem; }
    .page-header { flex-direction: column; align-items: flex-start; }
    .page-header h1 { font-size: 1.5rem; }

    .stats-grid { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 0.75rem; }
    .stat-card { padding: 1rem; }
    .stat-value { font-size: 1.75rem; }

    .server-panel-header { flex-direction: column; align-items: flex-start; }
    .servers-grid { grid-template-columns: 1fr; }
    .server-health-grid { grid-template-columns: 1fr; }
    .groups-grid { grid-template-columns: 1fr; }

    .table-container { overflow-x: auto; }
}