/* ============================================================
   Windows Controller - Professional UI/UX Design System
   ============================================================ */

:root {
  /* Core palette */
  --bg: #0b1220;
  --bg-gradient: radial-gradient(1200px 600px at 80% -10%, #1e293b 0%, #0b1220 55%);
  --bg-card: #141c2e;
  --bg-card-hover: #1a2438;
  --bg-inset: #0e1526;
  --border: #243047;
  --border-light: #2e3d5c;

  /* Text */
  --text: #e6edf7;
  --text-muted: #8b98b0;
  --text-faint: #5b6a85;

  /* Accent */
  --primary: #38bdf8;
  --primary-glow: rgba(56, 189, 248, 0.35);
  --primary-dark: #0ea5e9;
  --secondary: #a78bfa;

  /* Status */
  --success: #34d399;
  --warning: #fbbf24;
  --danger: #f87171;
  --info: #60a5fa;

  /* Sizes */
  --sidebar-width: 260px;
  --radius: 14px;
  --radius-sm: 10px;
  --radius-lg: 20px;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);

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

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'JetBrains Mono', 'Cascadia Code', 'Fira Code', 'Segoe UI', monospace;
  background: var(--bg);
  background-image: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text);
  min-height: 100vh;
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: var(--border-light);
  border-radius: 6px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary-dark);
}

/* ===== LOGIN ===== */
#login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  position: relative;
}

#login-page::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(600px 300px at 20% 20%, rgba(56,189,248,0.12), transparent 60%),
    radial-gradient(600px 300px at 80% 80%, rgba(167,139,250,0.12), transparent 60%);
  pointer-events: none;
}

.login-card {
  position: relative;
  background: rgba(20, 28, 46, 0.9);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 44px 40px;
  width: 380px;
  box-shadow: var(--shadow);
  animation: fadeUp 0.5s ease;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.login-card .logo {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  box-shadow: 0 8px 24px var(--primary-glow);
}

.login-card h1 {
  text-align: center;
  margin-bottom: 6px;
  font-size: 26px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.login-card .subtitle {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 28px;
  font-size: 14px;
}

.form-group {
  margin-bottom: 18px;
  position: relative;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.3px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

/* ===== BUTTONS ===== */
.btn {
  padding: 11px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
  background: var(--bg-card-hover);
  color: var(--text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn:hover {
  transform: translateY(-1px);
  filter: brightness(1.15);
  box-shadow: var(--shadow-sm);
}

.btn:active {
  transform: translateY(0) scale(0.97);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #0f172a;
}

.btn-primary:hover {
  box-shadow: 0 4px 16px var(--primary-glow);
}

.btn-danger {
  background: linear-gradient(135deg, #f87171, #ef4444);
  color: white;
}

.btn-success {
  background: linear-gradient(135deg, #34d399, #10b981);
  color: #0f172a;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
}

.btn-block {
  width: 100%;
}

.btn-icon {
  padding: 8px;
  width: 36px;
  height: 36px;
}

.error-msg {
  color: var(--danger);
  font-size: 13px;
  text-align: center;
  margin-top: 12px;
  min-height: 18px;
}

/* ===== LAYOUT ===== */
#app {
  display: none;
}

#app.active {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-width);
  background: rgba(14, 21, 38, 0.95);
  backdrop-filter: blur(10px);
  border-right: 1px solid var(--border);
  padding: 24px 0;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar .brand {
  padding: 0 24px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 700;
  border-bottom: 1px solid var(--border);
}

.sidebar .brand-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: 0 4px 12px var(--primary-glow);
}

.sidebar nav {
  flex: 1;
  padding: 16px 12px;
}

.sidebar nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 16px;
  margin-bottom: 4px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border-left: 3px solid transparent;
  transition: all var(--transition);
}

.sidebar nav a:hover {
  background: var(--bg-card);
  color: var(--text);
  transform: translateX(2px);
}

.sidebar nav a.active {
  background: linear-gradient(90deg, rgba(56,189,248,0.15), transparent);
  color: var(--primary);
  border-left-color: var(--primary);
  font-weight: 600;
}

.sidebar nav a .icon {
  width: 22px;
  text-align: center;
  font-size: 18px;
}

.sidebar .lang-switcher {
  padding: 12px 20px;
  display: flex;
  gap: 8px;
  border-top: 1px solid var(--border);
}

.sidebar .lang-switcher .btn {
  flex: 1;
  font-size: 13px;
  padding: 8px;
}

.sidebar .user-info {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

.sidebar .user-info .avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  margin-bottom: 10px;
}

.sidebar .user-info .username {
  font-weight: 600;
  color: var(--text);
  font-size: 14px;
}

.sidebar .user-info .role {
  color: var(--text-muted);
  font-size: 12px;
  margin-bottom: 12px;
}

.sidebar .logout-btn {
  width: 100%;
}

.main {
  flex: 1;
  padding: 28px;
  overflow-y: auto;
}

.page {
  display: none;
  animation: fadeIn 0.3s ease;
}

.page.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}

.page h2 {
  font-size: 26px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--text), var(--text-muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page .page-sub {
  color: var(--text-muted);
  font-size: 14px;
}

/* ===== CARDS / GRID ===== */
.grid {
  display: grid;
  gap: 18px;
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: var(--border-light);
}

.card .card-title {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
}

.card .card-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--text);
}

.card .card-sub {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* Metric cards */
.metric-card {
  position: relative;
  overflow: hidden;
}

.metric-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 80px;
  height: 80px;
  background: radial-gradient(circle at top right, var(--primary-glow), transparent 70%);
  opacity: 0.4;
  pointer-events: none;
}

.metric-card .metric-icon {
  font-size: 24px;
  margin-bottom: 10px;
}

.metric-card .metric-trend {
  font-size: 12px;
  margin-top: 8px;
  color: var(--text-muted);
}

/* ===== PROGRESS BARS ===== */
.progress {
  height: 8px;
  background: var(--bg-inset);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 12px;
}

.progress-bar {
  height: 100%;
  border-radius: 4px;
  transition: width 0.6s ease;
  position: relative;
}

.progress-bar.cpu {
  background: linear-gradient(90deg, var(--primary), var(--primary-dark));
  box-shadow: 0 0 8px var(--primary-glow);
}
.progress-bar.mem {
  background: linear-gradient(90deg, var(--success), #10b981);
}
.progress-bar.disk {
  background: linear-gradient(90deg, var(--warning), #d97706);
}

.bar-label {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ===== TABLES ===== */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-sm);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th, td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

th {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

tr {
  transition: background var(--transition);
}

tbody tr:hover {
  background: var(--bg-card-hover);
}

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

/* ===== BADGES ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.3px;
}

.badge-running { background: rgba(52,211,153,0.15); color: var(--success); border: 1px solid rgba(52,211,153,0.3); }
.badge-down { background: rgba(248,113,113,0.15); color: var(--danger); border: 1px solid rgba(248,113,113,0.3); }
.badge-admin { background: rgba(167,139,250,0.15); color: var(--secondary); border: 1px solid rgba(167,139,250,0.3); }
.badge-user { background: rgba(96,165,250,0.15); color: var(--info); border: 1px solid rgba(96,165,250,0.3); }

/* ===== SEARCH ===== */
.search-input {
  width: 100%;
  max-width: 320px;
  padding: 11px 14px;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

/* ===== TOOLBAR ===== */
.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== MODAL ===== */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  animation: fadeIn 0.2s ease;
}

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

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow);
  animation: fadeUp 0.3s ease;
}

.modal h3 {
  margin-bottom: 20px;
  font-size: 20px;
  font-weight: 700;
}

.modal .modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 24px;
}

/* ===== TOAST ===== */
#toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  color: white;
  font-size: 14px;
  font-family: inherit;
  box-shadow: var(--shadow);
  animation: slideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  min-width: 280px;
  border-left: 4px solid transparent;
}

.toast.success { background: rgba(16,185,129,0.95); border-left-color: #059669; }
.toast.error { background: rgba(239,68,68,0.95); border-left-color: #dc2626; }
.toast.info { background: rgba(14,165,233,0.95); border-left-color: #0284c7; }

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

/* ===== DISK CHARTS ===== */
.disk-charts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 18px;
  width: 100%;
}

.disk-chart-item {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 190px;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  transition: all var(--transition);
}

.disk-chart-item:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
}

.disk-chart-item .drive-label {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}

.disk-chart-item .drive-info {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 10px;
}

.disk-chart-item .chart-wrap {
  position: relative;
  width: 100%;
  max-width: 150px;
  height: 130px;
}

/* ===== MONITORED PROCESSES ===== */
.monitored-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  transition: all var(--transition);
}

.monitored-card:hover {
  border-color: var(--border-light);
  background: var(--bg-card-hover);
}

.monitored-card .proc-name {
  font-weight: 600;
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.monitored-card .proc-name .badge {
  vertical-align: middle;
  line-height: 1;
  padding: 4px 8px;
}

.monitored-card .proc-path {
  font-size: 13px;
  color: var(--text-muted);
  word-break: break-all;
  margin-top: 4px;
}

.monitored-card .actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
  align-items: center;
}

/* ===== STATS ROW ===== */
.stats-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.stat-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  flex: 1;
  min-width: 150px;
  transition: all var(--transition);
}

.stat-item:hover {
  border-color: var(--border-light);
}

.stat-item .label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-item .value {
  font-size: 24px;
  font-weight: 700;
  margin-top: 4px;
}

/* ===== SYSTEM INFO ===== */
.info-list {
  list-style: none;
}

.info-list li {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.info-list li:last-child {
  border-bottom: none;
}

.info-list li .label {
  color: var(--text-muted);
}

.info-list li .value {
  font-weight: 500;
}

/* ===== EMPTY STATE ===== */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
}

.empty-state .empty-icon {
  font-size: 48px;
  margin-bottom: 12px;
  opacity: 0.5;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .sidebar {
    width: 64px;
    padding: 16px 0;
  }
  .sidebar .brand {
    padding: 0 12px 16px;
    justify-content: center;
  }
  .sidebar .brand span {
    display: none;
  }
  .sidebar .brand-icon {
    width: 36px;
    height: 36px;
    font-size: 18px;
  }
  .sidebar nav {
    padding: 12px 8px;
  }
  .sidebar nav a {
    justify-content: center;
    padding: 12px;
  }
  .sidebar nav a span:not(.icon) {
    display: none;
  }
  .sidebar .lang-switcher {
    flex-direction: column;
    padding: 8px;
  }
  .sidebar .lang-switcher .btn {
    font-size: 11px;
    padding: 6px;
  }
  .sidebar .user-info {
    padding: 10px;
    text-align: center;
  }
  .sidebar .user-info .avatar,
  .sidebar .user-info .username,
  .sidebar .user-info .role {
    display: none;
  }
  .main {
    padding: 16px;
  }
  .page h2 {
    font-size: 22px;
  }
}