/* assets/css/style.css - Strictly following DESIGN.md with Dark/Light Mode Support */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@500;600;700&display=swap');

:root, [data-theme="dark"] {
  /* Dark Mode Palette (DESIGN.md) */
  --bg-primary: #121212;
  --surface-card: #1E1E1E;
  --surface-card-hover: #252525;
  --border-subtle: #2C2C2E;
  --accent-primary: #00E5FF; /* Cyan/Neon */
  --accent-primary-hover: #33ebff;
  --accent-secondary: #32D74B; /* Lime Green */
  --accent-alert: #FF453A; /* Red */
  --alert-bg: #3A1C1C;
  --alert-item-bg: #251B1B;
  --alert-item-text: #D1A3A3;
  --text-primary: #FFFFFF;
  --text-secondary: #98989D;
  --table-header-bg: #1A1A1A;
  --input-bg: #121212;
  --subbox-bg: #161616;
  --modal-bg: #1E1E1E;
  --modal-overlay-bg: rgba(0, 0, 0, 0.75);
  --btn-primary-text: #121212;
  --btn-secondary-bg: #2C2C2E;
  --btn-secondary-hover: #3A3A3C;
  --btn-secondary-text: #FFFFFF;
  --brand-icon-text: #121212;
  --avatar-bg: #2C2C2E;
  --chart-grid: #2C2C2E;
  --chart-tick: #98989D;
  --sidebar-width: 250px;

  /* Typography */
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

[data-theme="light"] {
  /* Light Mode Palette - Clean, Modern, Technical */
  --bg-primary: #F4F6F9;
  --surface-card: #FFFFFF;
  --surface-card-hover: #F8FAFC;
  --border-subtle: #E2E8F0;
  --accent-primary: #0284C7; /* High contrast cyan/sky */
  --accent-primary-hover: #0369A1;
  --accent-secondary: #16A34A; /* Crisp lime/green */
  --accent-alert: #DC2626; /* Crimson Red */
  --alert-bg: #FEF2F2;
  --alert-item-bg: #FFF5F5;
  --alert-item-text: #991B1B;
  --text-primary: #0F172A;
  --text-secondary: #64748B;
  --table-header-bg: #F8FAFC;
  --input-bg: #FFFFFF;
  --subbox-bg: #F8FAFC;
  --modal-bg: #FFFFFF;
  --modal-overlay-bg: rgba(15, 23, 42, 0.55);
  --btn-primary-text: #FFFFFF;
  --btn-secondary-bg: #F1F5F9;
  --btn-secondary-hover: #E2E8F0;
  --btn-secondary-text: #0F172A;
  --brand-icon-text: #FFFFFF;
  --avatar-bg: #F1F5F9;
  --chart-grid: #E2E8F0;
  --chart-tick: #64748B;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  transition: background-color 0.25s ease, color 0.25s ease;
}

/* App Container */
.app-wrapper {
  display: flex;
  width: 100%;
  min-height: 100vh;
}

/* Sidebar Navigation */
.sidebar {
  width: var(--sidebar-width);
  background-color: var(--surface-card);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.sidebar-brand {
  padding: 24px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--border-subtle);
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent-primary) 0%, #0284C7 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-icon-text);
  font-weight: 700;
  font-size: 18px;
}

.brand-title {
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.2px;
  color: var(--text-primary);
}

.brand-subtitle {
  font-size: 11px;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  font-weight: 600;
}

.sidebar-menu {
  list-style: none;
  padding: 20px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex-grow: 1;
}

.menu-section {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-secondary);
  padding: 12px 12px 6px;
  font-weight: 600;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  border-radius: 10px;
  transition: all 0.2s ease;
}

.sidebar-link:hover {
  background-color: var(--surface-card-hover);
  color: var(--text-primary);
}

.sidebar-link.active {
  background: rgba(0, 229, 255, 0.12);
  color: var(--accent-primary);
  font-weight: 600;
}

[data-theme="light"] .sidebar-link.active {
  background: rgba(2, 132, 199, 0.12);
  color: var(--accent-primary);
}

.sidebar-link svg {
  width: 18px;
  height: 18px;
  stroke-width: 2;
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 10px;
  overflow: hidden;
}

.user-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--avatar-bg);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 13px;
  border: 1px solid var(--border-subtle);
}

.user-info {
  line-height: 1.2;
  overflow: hidden;
}

.user-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
}

.user-role {
  font-size: 11px;
  color: var(--text-secondary);
}

/* Main Content Area */
.main-wrapper {
  margin-left: var(--sidebar-width);
  flex-grow: 1;
  padding: 24px 32px;
  max-width: 1600px;
  min-height: 100vh;
}

/* Top Header Bar */
.top-navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
}

.page-title {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 12px;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(50, 215, 75, 0.15);
  color: var(--accent-secondary);
  border: 1px solid rgba(50, 215, 75, 0.3);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-secondary);
  animation: pulse-live 1.8s infinite;
}

@keyframes pulse-live {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(50, 215, 75, 0.7); }
  70% { transform: scale(1.15); box-shadow: 0 0 0 8px rgba(50, 215, 75, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(50, 215, 75, 0); }
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Button Stylings */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font-main);
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
}

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

.btn-primary:hover {
  background-color: var(--accent-primary-hover);
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.4);
}

.btn-secondary {
  background-color: var(--btn-secondary-bg);
  color: var(--btn-secondary-text);
  border: 1px solid var(--border-subtle);
}

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

.btn-danger {
  background-color: var(--alert-bg);
  color: var(--accent-alert);
  border: 1px solid rgba(255, 69, 58, 0.4);
}

.btn-danger:hover {
  background-color: rgba(255, 69, 58, 0.25);
}

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

/* 12-Column Grid System according to DESIGN.md */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.col-12 { grid-column: span 12; }
.col-8  { grid-column: span 8; }
.col-6  { grid-column: span 6; }
.col-4  { grid-column: span 4; }
.col-3  { grid-column: span 3; }

/* Cards according to DESIGN.md */
.card {
  background-color: var(--surface-card);
  border-radius: 16px;
  padding: 20px;
  border: 1px solid var(--border-subtle);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-subtitle {
  font-size: 12px;
  color: var(--text-secondary);
}

/* KPI Top Cards (3 columns top according to DESIGN.md) */
.kpi-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 120px;
}

.kpi-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.kpi-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.kpi-badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 12px;
  font-weight: 600;
  background: rgba(0, 229, 255, 0.1);
  color: var(--accent-primary);
}

.kpi-value-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-top: 12px;
}

.kpi-value {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.kpi-unit {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}

.kpi-submetrics {
  display: flex;
  gap: 16px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
}

.submetric-item {
  display: flex;
  flex-direction: column;
}

.submetric-label {
  font-size: 11px;
  color: var(--text-secondary);
}

.submetric-val {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-primary);
}

/* Alert Box according to DESIGN.md */
.alert-box {
  background-color: var(--alert-bg);
  color: var(--accent-alert);
  border-left: 4px solid var(--accent-alert);
  padding: 12px 16px;
  border-radius: 6px;
  margin-bottom: 12px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
}

.alert-box.alert-success {
  background-color: rgba(50, 215, 75, 0.1);
  color: var(--accent-secondary);
  border-left-color: var(--accent-secondary);
}

.alert-box.alert-info {
  background-color: rgba(0, 229, 255, 0.1);
  color: var(--accent-primary);
  border-left-color: var(--accent-primary);
}

/* Alert List in Right Sidebar */
.alert-item {
  background-color: var(--alert-item-bg);
  border-left: 4px solid var(--accent-alert);
  padding: 12px 14px;
  border-radius: 8px;
  margin-bottom: 10px;
}

.alert-item-title {
  font-weight: 600;
  color: var(--accent-alert);
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.alert-item-time {
  font-size: 11px;
  color: var(--text-secondary);
}

.alert-item-desc {
  font-size: 12px;
  color: var(--alert-item-text);
  margin-top: 4px;
}

/* Tables according to DESIGN.md */
.table-container {
  overflow-x: auto;
  width: 100%;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.data-table th {
  padding: 14px 16px;
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border-subtle);
  background-color: var(--table-header-bg);
}

.data-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 13px;
  transition: background-color 0.15s ease;
}

.data-table tbody tr:hover td {
  background-color: var(--surface-card-hover);
}

.data-table .mono {
  font-family: var(--font-mono);
  font-weight: 600;
}

/* Form Controls */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  background-color: var(--input-bg);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.25s ease;
}

.form-control:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px rgba(0, 229, 255, 0.2);
}

select.form-control {
  cursor: pointer;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
}

.badge-cyan {
  background: rgba(0, 229, 255, 0.15);
  color: var(--accent-primary);
  border: 1px solid rgba(0, 229, 255, 0.3);
}

.badge-lime {
  background: rgba(50, 215, 75, 0.15);
  color: var(--accent-secondary);
  border: 1px solid rgba(50, 215, 75, 0.3);
}

.badge-alert {
  background: rgba(255, 69, 58, 0.15);
  color: var(--accent-alert);
  border: 1px solid rgba(255, 69, 58, 0.3);
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--modal-overlay-bg);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}

.modal-content {
  background-color: var(--modal-bg);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  width: 100%;
  max-width: 520px;
  padding: 24px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 12px;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 20px;
  cursor: pointer;
}

.modal-close:hover {
  color: var(--text-primary);
}

/* Pagination */
.pagination {
  display: flex;
  gap: 6px;
  align-items: center;
  justify-content: flex-end;
  margin-top: 16px;
}

.page-btn {
  padding: 6px 12px;
  border-radius: 6px;
  background-color: var(--surface-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  text-decoration: none;
  font-size: 13px;
  transition: all 0.2s;
}

.page-btn.active {
  background-color: var(--accent-primary);
  color: var(--btn-primary-text);
  font-weight: 600;
  border-color: var(--accent-primary);
}

.page-btn:hover:not(.active) {
  background-color: var(--surface-card-hover);
}

/* Device Health Box */
.device-box {
  margin-top: 16px;
  padding: 14px;
  background-color: var(--subbox-bg);
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
}

/* Responsive Navigation Elements */
.sidebar-toggle-btn {
  display: none;
  background: var(--btn-secondary-bg);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  cursor: pointer;
  padding: 6px 10px;
  border-radius: 8px;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.sidebar-toggle-btn:hover {
  background-color: var(--btn-secondary-hover);
}

.sidebar-close-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 24px;
  cursor: pointer;
  padding: 0 4px;
  margin-left: auto;
  line-height: 1;
}

.sidebar-close-btn:hover {
  color: var(--accent-alert);
}

.sidebar-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(3px);
  z-index: 1040;
  display: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.sidebar-backdrop.active {
  display: block;
  opacity: 1;
}

/* ========================================================
   RESPONSIVE BREAKPOINTS (Desktop, Tablet, Mobile)
   ======================================================== */

/* 1. Medium Desktop & Tablet Landscape (<= 1200px) */
@media (max-width: 1200px) {
  .col-8 { grid-column: span 12; }
  .col-4 { grid-column: span 12; }
  .col-3 { grid-column: span 6; }
}

/* 2. Tablet Portrait (<= 1024px) */
@media (max-width: 1024px) {
  .sidebar-toggle-btn {
    display: inline-flex;
  }
  .sidebar-close-btn {
    display: block;
  }
  .sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    width: 270px !important;
    z-index: 1050;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.4);
  }
  .sidebar.mobile-open {
    transform: translateX(0);
  }
  .main-wrapper {
    margin-left: 0 !important;
    width: 100% !important;
    padding: 20px 24px;
  }
  .col-6 {
    grid-column: span 12;
  }
}

/* 3. Mobile Devices (<= 768px) */
@media (max-width: 768px) {
  .main-wrapper {
    padding: 16px 14px;
  }
  .top-navbar {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    margin-bottom: 20px;
    padding-bottom: 12px;
  }
  .top-navbar > div:first-child {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 10px;
  }
  .page-title {
    font-size: 19px;
    flex-wrap: wrap;
    gap: 8px;
  }
  .header-actions {
    width: 100%;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
  }
  .col-3, .col-4, .col-6, .col-8, .col-12 {
    grid-column: span 12;
  }
  .grid-12 {
    gap: 16px;
  }
  .kpi-card {
    min-height: auto;
    padding: 18px;
  }
  .kpi-value {
    font-size: 28px;
  }
  .kpi-submetrics {
    flex-wrap: wrap;
    gap: 12px;
  }
  .submetric-item {
    min-width: 80px;
  }
  .card-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .card-header > div:last-child {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
  }
  .data-table {
    min-width: 720px;
  }
  .table-container {
    -webkit-overflow-scrolling: touch;
  }
  .pagination {
    justify-content: center;
    flex-wrap: wrap;
  }
  .modal-content {
    width: 95%;
    margin: 12px;
    padding: 18px;
    max-height: 90vh;
    overflow-y: auto;
  }
  .chart-container-wrapper {
    height: 280px !important;
  }
  .filter-action-group {
    margin-left: 0 !important;
    width: 100%;
    justify-content: space-between;
  }
}

/* 4. Small Mobile Devices (<= 480px) */
@media (max-width: 480px) {
  .page-title {
    font-size: 17px;
  }
  .status-badge {
    font-size: 11px;
    padding: 3px 8px;
  }
  .kpi-value {
    font-size: 25px;
  }
  .kpi-submetrics {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .submetric-item {
    min-width: unset;
  }
  .chart-container-wrapper {
    height: 240px !important;
  }
  .btn {
    padding: 7px 12px;
    font-size: 12px;
  }
}