/* ==============================================================================
   NetWatch Design System & Stylesheet (Mobile-First Vanilla CSS)
   ============================================================================== */

:root {
  /* Surface & Background */
  --bg: #faf8ff;
  --surface: #ffffff;
  --surface-low: #f2f3ff;
  --surface-container: #eaedff;
  --surface-container-high: #e2e7ff;
  --surface-container-highest: #dae2ff;

  /* Primary Brand & Accents */
  --primary: #004ac6;
  --primary-container: #2563eb;
  --on-primary: #ffffff;
  --secondary: #115cba;
  --secondary-container: #669dff;

  /* Status Colors */
  --tertiary: #006242;
  --tertiary-light: #007d55;
  --tertiary-bg: rgba(0, 125, 85, 0.12);
  --amber: #d97706;
  --amber-bg: rgba(217, 119, 6, 0.12);
  --error: #ba1a1a;
  --error-bg: rgba(186, 26, 26, 0.12);

  /* Typography */
  --on-surface: #091a3d;
  --on-surface-variant: #434655;
  --outline: #737686;
  --outline-variant: #c3c6d7;

  /* Fonts */
  --font-sans: "Plus Jakarta Sans", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  /* Elevation Shadows */
  --shadow-sm: 0 1px 3px rgba(9, 26, 61, 0.05), 0 1px 2px rgba(9, 26, 61, 0.03);
  --shadow-md: 0 4px 12px rgba(9, 26, 61, 0.06), 0 1px 3px rgba(9, 26, 61, 0.04);
  --shadow-lg: 0 12px 32px rgba(9, 26, 61, 0.08), 0 4px 12px rgba(9, 26, 61, 0.05);

  /* Safe Area Insets */
  --sat: env(safe-area-inset-top, 0px);
  --sab: env(safe-area-inset-bottom, 0px);
}

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

html, body {
  background-color: var(--bg);
  color: var(--on-surface);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

button, input, select {
  font-family: inherit;
}

/* Accessible Focus Rings */
:focus-visible {
  outline: 2px solid var(--primary-container);
  outline-offset: 2px;
}

/* Disconnected Banner */
.disconnected-banner {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: #fef2f2;
  border-bottom: 1px solid #fee2e2;
  color: var(--error);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(186, 26, 26, 0.08);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.disconnected-banner.hidden {
  display: none !important;
}

.banner-content {
  display: flex;
  align-items: center;
  gap: 8px;
}

.banner-badge {
  background: var(--error);
  color: #ffffff;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.spinner {
  width: 14px;
  height: 14px;
  border: 2px solid rgba(186, 26, 26, 0.25);
  border-top-color: var(--error);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* App Outer Frame & Desktop Enclosure */
.app-frame {
  max-width: 1440px;
  margin: 0 auto;
  min-height: 100vh;
  padding-bottom: calc(76px + var(--sab));
  display: flex;
  flex-direction: column;
}

@media (min-width: 1024px) {
  .app-frame {
    padding: 20px 24px;
    padding-bottom: 32px;
  }
}

/* Header & Pill Navigation */
.app-header {
  height: 64px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--surface-container);
  position: sticky;
  top: 0;
  z-index: 40;
}

@media (min-width: 1024px) {
  .app-header {
    height: 72px;
    padding: 0 24px;
    background: var(--surface);
    border: 1px solid var(--surface-container);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    position: relative;
    top: 0;
  }
}

.header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-icon {
  width: 38px;
  height: 38px;
  background: var(--primary-container);
  color: #ffffff;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.brand-name {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--on-surface);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: var(--surface-low);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.status-pill-live {
  color: var(--tertiary);
}

.live-beacon {
  position: relative;
  width: 8px;
  height: 8px;
  display: inline-flex;
}

.beacon-pulse {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background-color: var(--tertiary);
  opacity: 0.75;
  animation: ping 1.5s cubic-bezier(0, 0, 0.2, 1) infinite;
}

.beacon-dot {
  position: relative;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--tertiary);
}

@keyframes ping {
  75%, 100% {
    transform: scale(2.2);
    opacity: 0;
  }
}

/* Nav Pills (Desktop) */
.nav-pills {
  display: none;
  background: var(--surface-low);
  padding: 4px;
  border-radius: var(--radius-full);
  gap: 4px;
}

@media (min-width: 820px) {
  .nav-pills {
    display: inline-flex;
  }
}

.nav-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--on-surface-variant);
  transition: all 0.2s ease;
  min-height: 44px;
}

.nav-pill:hover {
  color: var(--on-surface);
  background: rgba(255, 255, 255, 0.6);
}

.nav-pill.active {
  background: var(--primary-container);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}

/* Right Header Actions */
.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  min-height: 44px;
  min-width: 44px;
  transition: all 0.2s ease;
}

.btn-primary {
  background: var(--primary-container);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.28);
}

.btn-primary:hover {
  background: #1d4ed8;
  transform: translateY(-1px);
}

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

.btn-danger:hover {
  background: #991b1b;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--surface-container-high);
  color: var(--on-surface);
}

.btn-outline:hover {
  background: var(--surface-low);
}

.btn-ghost {
  background: transparent;
  color: var(--on-surface-variant);
}

.btn-ghost:hover {
  background: var(--surface-low);
  color: var(--on-surface);
}

.btn-add-target {
  display: inline-flex;
}

@media (max-width: 899px) {
  .btn-add-target {
    display: none !important;
  }
  .user-role-label {
    display: none !important;
  }
  .user-chip {
    padding: 0;
    background: transparent;
  }
  .user-avatar {
    width: 36px;
    height: 36px;
  }
}

.user-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px 4px 4px;
  border-radius: var(--radius-full);
  background: var(--surface-low);
  font-size: 13px;
  font-weight: 600;
  min-height: 44px;
  transition: background 0.2s ease;
}

.user-chip:hover {
  background: var(--surface-container);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
}

/* Mobile Nav Bar (Bottom) */
.mobile-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: calc(64px + var(--sab));
  padding-bottom: var(--sab);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--surface-container);
  display: flex;
  align-items: center;
  justify-content: space-around;
  z-index: 50;
}

@media (min-width: 820px) {
  .mobile-nav {
    display: none;
  }
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  color: var(--on-surface-variant);
  font-size: 11px;
  font-weight: 600;
  flex: 1;
  height: 100%;
  min-height: 44px;
  transition: color 0.15s ease;
}

.mobile-nav-item.active {
  color: var(--primary-container);
}

/* Main Content Layout */
.main-content {
  flex: 1;
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

@media (min-width: 1024px) {
  .main-content {
    padding: 24px 0 0 0;
    gap: 24px;
  }
}

/* Hero Section */
.hero-block {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

@media (min-width: 768px) {
  .hero-block {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
  }
}

.hero-title-group h1 {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--on-surface);
  line-height: 1.25;
}

@media (min-width: 1024px) {
  .hero-title-group h1 {
    font-size: 32px;
  }
}

.hero-title-accent {
  color: var(--primary-container);
}

.hero-subtitle {
  font-size: 14.5px;
  color: var(--on-surface-variant);
  margin-top: 4px;
}

/* Range Filter Pills */
.range-pills {
  display: inline-flex;
  background: var(--surface-low);
  padding: 3px;
  border-radius: var(--radius-full);
  gap: 2px;
}

.range-btn {
  border: none;
  background: transparent;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 700;
  color: var(--on-surface-variant);
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}

.range-btn:hover {
  color: var(--on-surface);
}

.range-btn.active {
  background: var(--surface);
  color: var(--primary-container);
  box-shadow: var(--shadow-sm);
}

/* Four-Column Top Grid (Desktop) */
.grid-top-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 640px) {
  .grid-top-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-top-4 {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }
}

/* Card General Styling */
.card {
  background: var(--surface);
  border: 1px solid var(--surface-container);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

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

.card-header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
}

.card-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--on-surface-variant);
}

.metric-number {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  color: var(--on-surface);
  line-height: 1.15;
}

.metric-sub {
  font-size: 12px;
  color: var(--on-surface-variant);
  margin-top: 4px;
}

/* Trend Chip */
.trend-chip {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  font-size: 11.5px;
  font-weight: 700;
  font-family: var(--font-mono);
}

.trend-good {
  background: var(--tertiary-bg);
  color: var(--tertiary);
}

.trend-bad {
  background: var(--error-bg);
  color: var(--error);
}

.trend-neutral {
  background: var(--surface-low);
  color: var(--on-surface-variant);
}

/* Special Rich Blue High-Availability Card */
.card-ha {
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
  color: #ffffff;
  border: none;
  box-shadow: 0 10px 25px rgba(37, 99, 235, 0.25);
}

.card-ha .card-label {
  color: rgba(255, 255, 255, 0.75);
}

.card-ha .metric-number {
  color: #ffffff;
}

.card-ha .metric-sub {
  color: rgba(255, 255, 255, 0.85);
}

.ha-stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 8px;
}

.ha-stat-col {
  display: flex;
  flex-direction: column;
}

.ha-stat-col .card-label {
  font-size: 10px;
}

.ha-stat-val {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 16px;
  color: #ffffff;
}

/* Three-Column Bottom Grid (Desktop) */
.grid-bottom-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 1024px) {
  .grid-bottom-3 {
    grid-template-columns: 1.25fr 1.35fr 1fr;
    gap: 20px;
  }
}

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  text-align: center;
  gap: 16px;
}

.empty-radar-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--surface-low);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-container);
  border: 1px dashed var(--surface-container-high);
}

.empty-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--on-surface);
}

.empty-desc {
  font-size: 13.5px;
  color: var(--on-surface-variant);
  max-width: 320px;
}

/* Target List & Rows */
.target-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.target-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: var(--surface-low);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  cursor: pointer;
  min-height: 44px;
}

.target-row:hover {
  background: var(--surface-container);
  border-color: var(--surface-container-high);
  transform: translateY(-1px);
}

.target-row.row-new {
  animation: highlight-new 5s ease forwards;
}

@keyframes highlight-new {
  0% {
    background-color: #dbeafe;
    border-color: #3b82f6;
  }
  80% {
    background-color: #eff6ff;
  }
  100% {
    background-color: var(--surface-low);
    border-color: transparent;
  }
}

.target-row-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.target-row-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-container);
  flex-shrink: 0;
}

.target-row-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.target-host-title {
  font-weight: 700;
  font-size: 14px;
  color: var(--on-surface);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.target-meta-sub {
  font-size: 12px;
  color: var(--on-surface-variant);
}

.target-row-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.tag-new {
  background: var(--primary-container);
  color: #ffffff;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.latency-chip {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: var(--surface);
  color: var(--primary-container);
  box-shadow: 0 1px 3px rgba(9, 26, 61, 0.04);
}

/* Phase Latency Bar Chart (Overview) */
.phase-bars {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  align-items: flex-end;
  height: 160px;
  padding-top: 10px;
}

.phase-bar-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  height: 100%;
  justify-content: flex-end;
}

.phase-bar-track {
  width: 100%;
  max-width: 44px;
  background: var(--surface-low);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: flex-end;
  height: 100px;
  overflow: hidden;
}

.phase-bar-fill {
  width: 100%;
  background: var(--secondary-container);
  border-radius: var(--radius-sm);
  transition: height 0.5s ease;
}

.phase-bar-fill.fill-highlight {
  background: var(--primary-container);
}

.phase-bar-val {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--on-surface);
}

.phase-bar-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--on-surface-variant);
}

/* Replica Node Card & Badges */
.replica-card {
  background: var(--surface-low);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  border: 1px solid transparent;
  transition: all 0.3s ease;
}

.replica-card.is-leader-card {
  border-color: rgba(37, 99, 235, 0.3);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

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

.replica-identity {
  display: flex;
  align-items: center;
  gap: 10px;
}

.replica-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--tertiary);
  display: inline-block;
}

.replica-dot.dot-stale {
  background: var(--outline-variant);
}

.replica-id-text {
  font-weight: 800;
  font-size: 16px;
  color: var(--on-surface);
}

/* Cluster Badges & Flip Animation */
.role-badge {
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: all 0.3s ease;
}

.role-badge-leader {
  background: var(--primary-container);
  color: #ffffff;
  border: 1px solid transparent;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.25);
}

.role-badge-standby {
  background: transparent;
  color: var(--primary-container);
  border: 1.5px solid var(--primary-container);
}

.badge-flip {
  animation: badgeFlipAnim 0.45s ease-in-out;
}

@keyframes badgeFlipAnim {
  0% { transform: scale(1) rotateY(0deg); }
  50% { transform: scale(1.15) rotateY(90deg); }
  100% { transform: scale(1) rotateY(0deg); }
}

.replica-submeta {
  font-size: 12.5px;
  color: var(--on-surface-variant);
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
}

/* Highlighted Leadership Gap Pill */
.leadership-gap-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: #fef3c7;
  border: 1px solid #fde68a;
  color: #92400e;
  font-weight: 700;
  font-size: 12.5px;
  font-family: var(--font-mono);
}

/* Target Detail View */
.target-detail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-back {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--surface-container);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-container);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
}

.btn-back:hover {
  background: var(--surface-low);
  transform: scale(1.05);
}

.target-title-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.target-detail-title {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--on-surface);
}

@media (min-width: 1024px) {
  .target-detail-title {
    font-size: 32px;
  }
}

.health-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.health-chip-ok {
  background: var(--tertiary-bg);
  color: var(--tertiary);
}

.health-chip-error {
  background: var(--error-bg);
  color: var(--error);
}

/* Latency Line Chart Container */
.chart-container {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--surface-container);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.chart-canvas-wrap {
  position: relative;
  width: 100%;
  height: 240px;
  background: var(--surface-low);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.chart-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.chart-tooltip {
  position: absolute;
  pointer-events: none;
  background: rgba(9, 26, 61, 0.92);
  color: #ffffff;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-family: var(--font-mono);
  box-shadow: var(--shadow-md);
  transform: translate(-50%, -120%);
  transition: opacity 0.15s ease;
  white-space: nowrap;
}

/* 2x2 Protocol Breakdown Grid */
.grid-2x2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 640px) {
  .grid-2x2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

.protocol-card {
  background: var(--surface);
  border: 1px solid var(--surface-container);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
}

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

.protocol-icon-wrap {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--surface-low);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-container);
}

.protocol-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--on-surface);
}

.protocol-bar-track {
  width: 100%;
  height: 6px;
  background: var(--surface-low);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.protocol-bar-fill {
  height: 100%;
  background: var(--primary-container);
  border-radius: var(--radius-full);
}

/* Last 20 Probes Row of Rounded Squares (Accessibility: NOT color alone) */
.probes-row-wrap {
  background: var(--surface);
  border: 1px solid var(--surface-container);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.probes-squares-row {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.probe-square {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.15s ease;
  position: relative;
}

.probe-square:hover {
  transform: scale(1.15);
  z-index: 10;
}

.probe-square-ok {
  background: var(--tertiary);
  color: #ffffff;
}

.probe-square-error {
  background: var(--error);
  color: #ffffff;
}

.probe-square-empty {
  background: var(--surface-container);
  color: var(--outline);
}

.probe-square svg {
  width: 14px;
  height: 14px;
}

/* TLS Certificate Card */
.tls-card {
  background: var(--surface);
  border: 1px solid var(--surface-container);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.tls-progress-bar {
  width: 100%;
  height: 8px;
  background: var(--surface-low);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.tls-progress-fill {
  height: 100%;
  background: var(--primary-container);
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
}

.tls-progress-fill.fill-amber {
  background: var(--amber) !important;
}

.tls-progress-fill.fill-red {
  background: var(--error) !important;
}

/* Events Timeline */
.events-timeline {
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
  padding-left: 20px;
}

.events-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--surface-container);
}

.timeline-item {
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  font-size: 13.5px;
}

.timeline-dot {
  position: absolute;
  left: -19px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--primary-container);
  border: 2px solid var(--surface);
}

.timeline-dot.dot-green {
  background: var(--tertiary);
}

.timeline-time {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--on-surface-variant);
  white-space: nowrap;
}

/* Bottom Sheet & Modals */
.sheet-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(9, 26, 61, 0.4);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 110;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  transition: opacity 0.25s ease;
}

@media (min-width: 640px) {
  .sheet-backdrop {
    align-items: center;
  }
}

.sheet-backdrop.hidden {
  display: none !important;
}

.bottom-sheet {
  width: 100%;
  max-width: 520px;
  background: var(--surface);
  border-top-left-radius: var(--radius-lg);
  border-top-right-radius: var(--radius-lg);
  padding: 24px;
  padding-bottom: calc(24px + var(--sab));
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  max-height: 90vh;
  overflow-y: auto;
}

@media (min-width: 640px) {
  .bottom-sheet {
    border-radius: var(--radius-lg);
    padding-bottom: 24px;
  }
}

@keyframes slideUp {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

.sheet-handle {
  width: 40px;
  height: 4px;
  background: var(--surface-container-high);
  border-radius: var(--radius-full);
  margin: 0 auto 16px auto;
  cursor: grab;
}

@media (min-width: 640px) {
  .sheet-handle {
    display: none;
  }
}

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

.sheet-title {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--on-surface);
}

.sheet-subtitle {
  font-size: 13px;
  color: var(--on-surface-variant);
  margin-top: 3px;
}

.btn-icon-close {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--surface-low);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--on-surface-variant);
  min-height: 44px;
  min-width: 44px;
}

.sheet-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-row {
  display: flex;
  gap: 12px;
}

.flex-1 { flex: 1; }
.flex-2 { flex: 2; }

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--on-surface-variant);
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: 12px;
  color: var(--outline);
  pointer-events: none;
}

.form-input {
  width: 100%;
  height: 44px;
  padding: 0 14px;
  padding-left: 38px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--surface-container-high);
  background: var(--surface);
  font-size: 14px;
  color: var(--on-surface);
  transition: border-color 0.15s ease;
}

.form-input:focus {
  border-color: var(--primary-container);
  outline: none;
}

.inline-error {
  font-size: 11.5px;
  color: var(--error);
  font-weight: 600;
  min-height: 16px;
}

/* Segmented Interval Control */
.segmented-control {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  background: var(--surface-low);
  padding: 4px;
  border-radius: var(--radius-full);
}

.segment-btn {
  border: none;
  background: transparent;
  padding: 8px 12px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 700;
  color: var(--on-surface-variant);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  min-height: 44px;
  transition: all 0.15s ease;
}

.segment-btn.active {
  background: var(--primary-container);
  color: #ffffff;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.25);
}

.form-info-box {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--surface-low);
  border-radius: var(--radius-md);
  font-size: 12.5px;
  color: var(--on-surface-variant);
}

.sheet-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 8px;
}

.quick-keys-row {
  display: flex;
  gap: 8px;
}

/* Shimmer Loading Skeleton */
.skeleton {
  background: linear-gradient(90deg, #f2f3ff 25%, #e2e7ff 50%, #f2f3ff 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Helpers */
.hidden { display: none !important; }
.text-error { color: var(--error) !important; }

/* Reduced Motion Override */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}