/* ═══════════════════════════════════════════════
   RootCauseArena V3 — Premium Dark Design System
   ═══════════════════════════════════════════════ */

/* ── Design Tokens ── */
:root {
  --bg-base:        #080c14;
  --bg-surface:     #0d1525;
  --bg-card:        rgba(16, 27, 50, 0.75);
  --bg-card-hover:  rgba(22, 38, 68, 0.9);

  --border:         rgba(56, 100, 185, 0.22);
  --border-bright:  rgba(56, 150, 255, 0.45);

  --accent-blue:    #3b82f6;
  --accent-purple:  #8b5cf6;
  --accent-cyan:    #06b6d4;
  --accent-green:   #10b981;
  --accent-yellow:  #f59e0b;
  --accent-red:     #ef4444;

  --text-primary:   #e2e8f0;
  --text-secondary: #7f8fa6;
  --text-muted:     #4a5568;

  --font-ui:        'Inter', system-ui, sans-serif;
  --font-mono:      'JetBrains Mono', 'Courier New', monospace;

  --radius-sm:      6px;
  --radius-md:      12px;
  --radius-lg:      18px;

  --shadow-glow-blue:   0 0 20px rgba(59, 130, 246, 0.3);
  --shadow-glow-red:    0 0 20px rgba(239, 68, 68, 0.4);
  --shadow-glow-green:  0 0 20px rgba(16, 185, 129, 0.3);
  --shadow-card:        0 4px 24px rgba(0, 0, 0, 0.5);

  --transition: 0.2s ease;
}

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

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: 14px;
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  /* Subtle radial glow in the background */
  background-image:
    radial-gradient(ellipse 80% 50% at 20% 20%, rgba(59, 130, 246, 0.05) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(139, 92, 246, 0.05) 0%, transparent 60%);
}

/* ── Header ── */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
  background: rgba(8, 12, 20, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  flex-shrink: 0;
  z-index: 100;
}

.header-brand { display: flex; align-items: center; gap: 14px; }
.brand-icon { font-size: 28px; filter: drop-shadow(0 0 8px rgba(59,130,246,0.8)); }
.brand-title {
  font-size: 18px; font-weight: 700; letter-spacing: -0.3px;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.brand-subtitle { font-size: 11px; color: var(--text-secondary); font-family: var(--font-mono); }

.header-status {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  font-size: 12px; font-family: var(--font-mono);
}

.status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-yellow);
  animation: pulse 2s ease-in-out infinite;
}
.status-dot.online { background: var(--accent-green); }
.status-dot.error  { background: var(--accent-red); animation: none; }

/* ── Layout ── */
.app-layout {
  display: grid;
  grid-template-columns: 280px 1fr 300px;
  gap: 0;
  flex: 1;
  overflow: hidden;
}

.panel {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.control-panel { border-left: none; border-top: none; border-bottom: none; }
.log-panel     { border-right: none; border-top: none; border-bottom: none; }

/* ── Panel Sections ── */
.panel-section { display: flex; flex-direction: column; gap: 10px; }
.section-label {
  font-size: 10px; font-weight: 700; letter-spacing: 1.5px;
  text-transform: uppercase; color: var(--text-muted);
  padding-bottom: 6px; border-bottom: 1px solid var(--border);
}

/* ── Task Selection Cards ── */
.task-grid { display: flex; flex-direction: column; gap: 8px; }

.task-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.task-card::before {
  content: '';
  position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--task-color, var(--accent-blue));
  border-radius: 3px 0 0 3px;
}
.task-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-bright);
  transform: translateX(3px);
}
.task-card.active {
  border-color: var(--task-color, var(--accent-blue));
  box-shadow: 0 0 15px rgba(59, 130, 246, 0.15);
  background: var(--bg-card-hover);
}
.task-card-title { font-weight: 600; font-size: 13px; }
.task-card-meta  { font-size: 11px; color: var(--text-secondary); margin-top: 2px; }

.difficulty-badge {
  display: inline-block; font-size: 9px; font-weight: 700; letter-spacing: 1px;
  padding: 2px 7px; border-radius: 10px; text-transform: uppercase; margin-top: 4px;
}
.difficulty-easy   { background: rgba(16, 185, 129, 0.15); color: var(--accent-green); }
.difficulty-medium { background: rgba(245, 158, 11, 0.15); color: var(--accent-yellow); }
.difficulty-hard   { background: rgba(239, 68, 68, 0.15);  color: var(--accent-red); }
.difficulty-extreme{ background: rgba(139, 92, 246, 0.15); color: var(--accent-purple); }

/* ── Stat Cards ── */
.stat-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
}
.stat-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 10px; text-align: center;
}
.stat-value {
  display: block; font-family: var(--font-mono); font-size: 22px;
  font-weight: 600; color: var(--accent-blue);
}
.stat-label { font-size: 10px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }

/* ── Progress Bar ── */
.progress-bar-wrap { margin-top: 6px; }
.progress-bar-label { display: flex; justify-content: space-between; font-size: 11px; color: var(--text-secondary); margin-bottom: 6px; }
.progress-track {
  height: 6px; background: rgba(255,255,255,0.06); border-radius: 3px; overflow: hidden;
}
.progress-fill {
  height: 100%; width: 0%; border-radius: 3px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
  transition: width 0.4s ease;
  box-shadow: 0 0 8px rgba(59, 130, 246, 0.5);
}

/* ── Action Area ── */
.action-targets {
  display: flex; flex-wrap: wrap; gap: 6px;
}
.target-btn {
  flex: 1 1 calc(50% - 3px); min-width: 0;
  padding: 8px 6px; border-radius: var(--radius-sm);
  background: var(--bg-card); border: 1px solid var(--border);
  color: var(--text-primary); font-family: var(--font-mono); font-size: 11px;
  cursor: pointer; transition: all var(--transition); text-align: center;
}
.target-btn:hover { background: var(--bg-card-hover); border-color: var(--border-bright); }
.target-btn.selected {
  border-color: var(--accent-blue);
  background: rgba(59, 130, 246, 0.12);
  color: var(--accent-blue);
  box-shadow: var(--shadow-glow-blue);
}
.target-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.action-buttons { display: flex; flex-direction: column; gap: 6px; margin-top: 6px; }
.action-buttons button { width: 100%; }

/* ── Buttons ── */
.btn {
  padding: 9px 16px; border-radius: var(--radius-sm); border: 1px solid transparent;
  font-family: var(--font-ui); font-size: 13px; font-weight: 500; cursor: pointer;
  transition: all var(--transition); display: flex; align-items: center; justify-content: center; gap: 6px;
}
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue), #2563eb);
  color: #fff; border-color: transparent;
  box-shadow: 0 2px 12px rgba(59, 130, 246, 0.3);
}
.btn-primary:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 4px 20px rgba(59, 130, 246, 0.5); }

.btn-secondary {
  background: var(--bg-card); color: var(--text-primary); border-color: var(--border);
}
.btn-secondary:hover:not(:disabled) { background: var(--bg-card-hover); border-color: var(--border-bright); }

.btn-success {
  background: linear-gradient(135deg, var(--accent-green), #059669);
  color: #fff;
}
.btn-success:hover:not(:disabled) { transform: translateY(-1px); box-shadow: var(--shadow-glow-green); }

.btn-danger {
  background: linear-gradient(135deg, var(--accent-red), #dc2626);
  color: #fff;
}
.btn-danger:hover:not(:disabled) { transform: translateY(-1px); box-shadow: var(--shadow-glow-red); }

.btn-ghost {
  background: transparent; color: var(--text-secondary); border-color: var(--border);
}
.btn-ghost:hover:not(:disabled) { color: var(--text-primary); border-color: var(--border-bright); }

.btn-icon {
  background: transparent; border: none; color: var(--text-muted);
  cursor: pointer; font-size: 14px; padding: 4px 6px; border-radius: var(--radius-sm);
  transition: color var(--transition);
}
.btn-icon:hover { color: var(--text-primary); }

.w-full { width: 100%; }
.mt     { margin-top: 6px; }

/* ── Center Column ── */
.center-column {
  overflow-y: auto; padding: 20px;
  display: flex; flex-direction: column; gap: 20px;
  background: transparent;
}

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

.episode-status-badge {
  font-size: 11px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase;
  padding: 4px 12px; border-radius: 20px;
  background: rgba(127, 143, 166, 0.1); color: var(--text-muted);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.episode-status-badge.running { background: rgba(245, 158, 11, 0.1); color: var(--accent-yellow); border-color: var(--accent-yellow); }
.episode-status-badge.success { background: rgba(16, 185, 129, 0.1); color: var(--accent-green); border-color: var(--accent-green); }
.episode-status-badge.failed  { background: rgba(239, 68, 68, 0.1);  color: var(--accent-red);   border-color: var(--accent-red); }

/* ── Components Grid ── */
.components-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px;
  position: relative; min-height: 300px;
}

.no-session-overlay {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(8, 12, 20, 0.6);
  border-radius: var(--radius-lg);
  border: 2px dashed var(--border);
}
.no-session-content { text-align: center; color: var(--text-muted); }
.no-session-icon { font-size: 40px; margin-bottom: 12px; }

/* ── Component Cards ── */
.component-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: all 0.3s ease;
  position: relative; overflow: hidden;
  backdrop-filter: blur(6px);
}
.component-card::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.03) 0%, transparent 60%);
  pointer-events: none;
}

.component-card.status-healthy {
  border-color: rgba(16, 185, 129, 0.35);
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.08);
}
.component-card.status-degraded {
  border-color: rgba(245, 158, 11, 0.45);
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.12);
}
.component-card.status-down {
  border-color: rgba(239, 68, 68, 0.5);
  box-shadow: 0 4px 20px rgba(239, 68, 68, 0.18);
  animation: card-pulse-danger 2.5s ease-in-out infinite;
}

@keyframes card-pulse-danger {
  0%, 100% { box-shadow: 0 4px 20px rgba(239, 68, 68, 0.18); }
  50%       { box-shadow: 0 4px 30px rgba(239, 68, 68, 0.4); }
}

.comp-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.comp-name {
  font-size: 15px; font-weight: 700; text-transform: capitalize;
  display: flex; align-items: center; gap: 8px;
}
.comp-icon { font-size: 18px; }

.comp-status-pill {
  font-size: 10px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase;
  padding: 3px 10px; border-radius: 12px;
}
.pill-healthy  { background: rgba(16, 185, 129, 0.15); color: var(--accent-green); }
.pill-degraded { background: rgba(245, 158, 11, 0.15); color: var(--accent-yellow); }
.pill-down     { background: rgba(239, 68, 68, 0.15);  color: var(--accent-red); animation: pill-blink 1.2s steps(2) infinite; }

@keyframes pill-blink { 50% { opacity: 0.4; } }

/* ── Metrics Bars ── */
.metrics-list { display: flex; flex-direction: column; gap: 8px; }
.metric-row   { display: flex; flex-direction: column; gap: 3px; }
.metric-header{ display: flex; justify-content: space-between; font-size: 11px; }
.metric-name  { color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.8px; font-size: 10px; }
.metric-val   { font-family: var(--font-mono); color: var(--text-primary); font-size: 11px; }
.metric-track {
  height: 4px; background: rgba(255,255,255,0.05); border-radius: 2px; overflow: hidden;
}
.metric-fill  { height: 100%; border-radius: 2px; transition: width 0.5s ease; }
.fill-latency  { background: var(--accent-cyan); }
.fill-error    { background: var(--accent-red); }
.fill-queue    { background: var(--accent-yellow); }
.fill-cpu      { background: var(--accent-purple); }

/* ── Log Console ── */
.log-header { display: flex; align-items: center; justify-content: space-between; }
.log-console {
  flex: 1; overflow-y: auto; background: rgba(0,0,0,0.3);
  border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 12px; font-family: var(--font-mono); font-size: 11.5px;
  display: flex; flex-direction: column; gap: 4px;
  min-height: 0;
  scrollbar-width: thin; scrollbar-color: var(--border) transparent;
}
.log-console::-webkit-scrollbar { width: 4px; }
.log-console::-webkit-scrollbar-track { background: transparent; }
.log-console::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.log-entry {
  display: flex; gap: 8px; align-items: baseline;
  padding: 4px 6px; border-radius: 4px;
  animation: log-in 0.25s ease;
  border-left: 2px solid transparent;
}
@keyframes log-in { from { opacity: 0; transform: translateX(-6px); } }

.log-ts { color: var(--text-muted); flex-shrink: 0; font-size: 10px; }
.log-msg { flex: 1; line-height: 1.5; }
.log-tag { font-size: 9px; font-weight: 700; padding: 1px 5px; border-radius: 3px; flex-shrink: 0; }

.log-info    { border-left-color: var(--accent-blue); }
.log-info .log-tag { background: rgba(59,130,246,0.15); color: var(--accent-blue); }

.log-warn    { border-left-color: var(--accent-yellow); }
.log-warn .log-tag { background: rgba(245,158,11,0.15); color: var(--accent-yellow); }

.log-error   { border-left-color: var(--accent-red); background: rgba(239,68,68,0.05); }
.log-error .log-tag { background: rgba(239,68,68,0.15); color: var(--accent-red); }

.log-system  { border-left-color: var(--accent-purple); }
.log-system .log-tag { background: rgba(139,92,246,0.15); color: var(--accent-purple); }

.log-success { border-left-color: var(--accent-green); }
.log-success .log-tag { background: rgba(16,185,129,0.15); color: var(--accent-green); }

/* ── Baseline Table ── */
.baseline-section { display: flex; flex-direction: column; gap: 12px; }
.results-table {
  width: 100%; border-collapse: collapse;
  background: var(--bg-card); border-radius: var(--radius-md); overflow: hidden;
}
.results-table th {
  padding: 10px 14px; text-align: left; font-size: 10px; font-weight: 700;
  letter-spacing: 1px; text-transform: uppercase; color: var(--text-muted);
  background: rgba(0,0,0,0.2); border-bottom: 1px solid var(--border);
}
.results-table td {
  padding: 10px 14px; font-family: var(--font-mono); font-size: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.results-table tr:last-child td { border-bottom: none; }
.results-table tr:hover td { background: rgba(255,255,255,0.02); }

.result-success { color: var(--accent-green); font-weight: 700; }
.result-fail    { color: var(--accent-red); font-weight: 700; }

/* ── Modal ── */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.7);
  backdrop-filter: blur(6px); z-index: 1000;
  display: flex; align-items: center; justify-content: center;
}
.modal {
  background: var(--bg-surface); border: 1px solid var(--border-bright);
  border-radius: var(--radius-lg); padding: 28px; max-width: 400px; width: 90%;
  box-shadow: 0 20px 60px rgba(0,0,0,0.7);
  animation: modal-in 0.2s ease;
  display: flex; flex-direction: column; gap: 12px;
}
@keyframes modal-in { from { opacity: 0; transform: scale(0.95); } }
.modal-title { font-size: 18px; font-weight: 700; }
.modal-body  { color: var(--text-secondary); font-size: 13px; line-height: 1.6; }

/* ── Animations / helpers ── */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

.shimmer {
  background: linear-gradient(90deg, rgba(255,255,255,0.03) 0%, rgba(255,255,255,0.08) 50%, rgba(255,255,255,0.03) 100%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }