:root {
  --bg: #f0f4f8;
  --bg-subtle: #e8edf3;
  --surface: #ffffff;
  --surface-hover: #f8fafc;
  --border: #dde3ec;
  --border-strong: #c5d0de;
  --text: #1a2332;
  --text-secondary: #4a5568;
  --muted: #718096;
  --primary: #2563eb;
  --primary-light: #eff6ff;
  --primary-hover: #1d4ed8;
  --danger: #dc2626;
  --danger-light: #fef2f2;
  --danger-border: #fecaca;
  --success: #16a34a;
  --success-light: #f0fdf4;
  --success-border: #bbf7d0;
  --warn: #d97706;
  --warn-light: #fffbeb;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08);
  --radius: 12px;
  --radius-sm: 8px;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Header ── */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.75rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.logo {
  font-size: 1.75rem;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-light);
  border-radius: var(--radius-sm);
}

.header h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}

.subtitle {
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 0.1rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.steps-hint {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.82rem;
  color: var(--text-secondary);
  background: var(--bg);
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--border);
}

.step { font-weight: 500; }
.step-arrow { color: var(--border-strong); font-size: 0.75rem; }

/* ── Layout ── */
.layout {
  display: grid;
  grid-template-columns: 300px 1fr 290px;
  gap: 1.25rem;
  padding: 1.25rem 1.75rem 2rem;
  max-width: 1680px;
  margin: 0 auto;
}

/* ── Panel ── */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
}

.panel-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.85rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--bg-subtle);
}

.panel-icon { font-size: 1rem; }

.panel h2 {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0;
  text-transform: none;
}

/* ── Scenario Tabs ── */
.tabs { display: flex; flex-direction: column; gap: 0.45rem; }

.tab {
  text-align: left;
  padding: 0.7rem 0.9rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
  font-size: 0.9rem;
  font-weight: 500;
  font-family: inherit;
}

.tab:hover {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary);
}

.tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}

.desc {
  font-size: 0.84rem;
  color: var(--muted);
  margin-bottom: 0.75rem;
  line-height: 1.55;
  padding: 0.55rem 0.7rem;
  background: var(--bg);
  border-radius: var(--radius-sm);
}

/* ── Sample List ── */
.sample-list { list-style: none; display: flex; flex-direction: column; gap: 0.45rem; }

.sample-item {
  padding: 0.7rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  font-size: 0.88rem;
  transition: all 0.15s ease;
  line-height: 1.45;
}

.sample-item:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.sample-item.active {
  border-color: var(--primary);
  background: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.sample-item strong {
  color: var(--primary);
  font-size: 0.8rem;
  margin-right: 0.3rem;
}

.sample-item small {
  display: block;
  color: var(--muted);
  margin-top: 0.2rem;
  font-size: 0.8rem;
}

/* ── Attack Guide ── */
.guide-block { font-size: 0.86rem; }

.guide-section {
  padding: 0.65rem 0.75rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.5rem;
  border-left: 3px solid;
}

.guide-section.attack { background: #fff7ed; border-color: var(--warn); }
.guide-section.consequence { background: var(--danger-light); border-color: var(--danger); }
.guide-section.defense { background: var(--success-light); border-color: var(--success); }

.guide-section h3 {
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.guide-section.attack h3 { color: var(--warn); }
.guide-section.consequence h3 { color: var(--danger); }
.guide-section.defense h3 { color: var(--success); }

.guide-section p, .guide-section li {
  color: var(--text-secondary);
  font-size: 0.84rem;
}

.guide-section ul { margin: 0.2rem 0 0 1.1rem; }

.empty-hint {
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
  padding: 1rem 0.5rem;
}

/* ── Input Area ── */
textarea, input[type="text"] {
  width: 100%;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 0.75rem 0.9rem;
  font-family: inherit;
  font-size: 0.9rem;
  transition: border-color 0.15s;
  resize: vertical;
}

textarea:focus, input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
  background: var(--surface);
}

.input-actions {
  margin-top: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

/* ── Buttons ── */
.btn {
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.6rem 1.15rem;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover:not(:disabled) { background: var(--primary-hover); }

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1.5px solid var(--border);
  width: 100%;
  justify-content: center;
}

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

.btn-outline {
  background: var(--surface);
  color: var(--text-secondary);
  border: 1.5px solid var(--border);
}

.btn-outline:hover { border-color: var(--primary); color: var(--primary); }

.btn-ghost {
  background: transparent;
  color: var(--muted);
  padding: 0.4rem 0.6rem;
  font-size: 1.1rem;
}

.btn-ghost:hover { color: var(--text); background: var(--bg); }

.btn-icon { font-size: 0.75rem; }

/* ── Defense Warning ── */
.defense-warning {
  background: var(--warn-light);
  border-bottom: 1px solid #fde68a;
  color: #92400e;
  padding: 0.55rem 1.75rem;
  font-size: 0.85rem;
  font-weight: 500;
  text-align: center;
}

/* ── Compare Section ── */
.compare-section-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.65rem;
  padding-left: 0.15rem;
}

.compare-summary {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1rem;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
}

.summary-side {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.summary-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.summary-status {
  font-size: 1.05rem;
  font-weight: 700;
}

.summary-vuln .summary-status.hit { color: var(--danger); }
.summary-vuln .summary-status.safe { color: var(--muted); }
.summary-secure .summary-status.ok { color: var(--success); }
.summary-secure .summary-status.fail { color: var(--danger); }

.summary-detail {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.summary-vs {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--border-strong);
  padding: 0.35rem 0.6rem;
  background: var(--bg);
  border-radius: 999px;
}

.level-badge {
  font-size: 0.68rem;
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-weight: 600;
  margin-left: 0.35rem;
  vertical-align: middle;
}

.level-入门 { background: #e0f2fe; color: #0369a1; }
.level-进阶 { background: #fef3c7; color: #b45309; }
.level-高级 { background: #fce7f3; color: #be185d; }

.attack-chain {
  display: block;
  font-size: 0.75rem;
  color: var(--primary);
  margin-top: 0.2rem;
  font-weight: 500;
}

.defense-layer-tag {
  display: inline-block;
  font-size: 0.75rem;
  padding: 0.15rem 0.45rem;
  margin: 0.15rem 0.2rem 0 0;
  border-radius: 4px;
  background: var(--success-light);
  color: var(--success);
  border: 1px solid var(--success-border);
  font-weight: 500;
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.result-card {
  position: relative;
  overflow: hidden;
  padding-top: 0;
}

.card-top-bar {
  height: 4px;
  margin: 0 -1.2rem 1rem;
}

.result-card.vulnerable .card-top-bar { background: linear-gradient(90deg, #f87171, #dc2626); }
.result-card.secure .card-top-bar { background: linear-gradient(90deg, #4ade80, #16a34a); }

.result-card.vulnerable { border-color: var(--danger-border); }
.result-card.secure { border-color: var(--success-border); }

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.85rem;
  gap: 0.75rem;
}

.card-header-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.4rem;
  flex-shrink: 0;
}

.btn-pipeline {
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid #bfdbfe;
  padding: 0.35rem 0.7rem;
  font-size: 0.78rem;
  font-weight: 600;
  white-space: nowrap;
}

.btn-pipeline:hover {
  background: #dbeafe;
  border-color: var(--primary);
}

.card-title-group {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
}

.card-icon { font-size: 1.3rem; margin-top: 0.1rem; }

.card-header h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.card-sub {
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 0.1rem;
}

/* ── Badges ── */
.badge {
  font-size: 0.72rem;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}

.badge-neutral { background: var(--bg); color: var(--muted); border: 1px solid var(--border); }
.badge-danger { background: var(--danger); color: #fff; }
.badge-success { background: var(--success); color: #fff; }
.badge-warn { background: var(--warn); color: #fff; }

/* ── Output Box ── */
.output-box {
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1rem;
  min-height: 130px;
  white-space: pre-wrap;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--text);
  word-break: break-word;
}

.output-box.placeholder {
  color: var(--muted);
  font-style: italic;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.result-card.vulnerable .output-box.attack-success {
  border-color: var(--danger);
  background: var(--danger-light);
  color: #991b1b;
  font-style: normal;
}

.result-card.secure .output-box.defense-success {
  border-color: var(--success);
  background: var(--success-light);
  color: #166534;
  font-style: normal;
}

.result-card.secure .output-box.attack-success {
  border-color: var(--danger);
  background: var(--danger-light);
  font-style: normal;
}

.result-meta {
  margin-top: 0.75rem;
}

.meta-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.35rem;
}

.consequences, .defense-info {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.tag {
  font-size: 0.75rem;
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
  background: var(--danger-light);
  color: var(--danger);
  border: 1px solid var(--danger-border);
  font-weight: 500;
}

.tag.defense {
  background: var(--success-light);
  color: var(--success);
  border-color: var(--success-border);
}

.explain {
  margin-top: 0.65rem;
  font-size: 0.83rem;
  color: var(--text-secondary);
  padding: 0.55rem 0.7rem;
  background: var(--bg);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--border-strong);
}

.muted { color: var(--muted); }
.hidden { display: none !important; }

.loading {
  font-size: 0.85rem;
  color: var(--primary);
  font-weight: 500;
}

/* ── Settings ── */
.settings-form { display: flex; flex-direction: column; gap: 0.75rem; }

.settings-group {
  padding: 0.75rem;
  background: var(--bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.group-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.5rem;
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.88rem;
  cursor: pointer;
  padding: 0.3rem 0;
  color: var(--text-secondary);
}

.checkbox input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
  cursor: pointer;
}

.field span {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.3rem;
}

.status-msg {
  font-size: 0.82rem;
  color: var(--success);
  margin-top: 0.4rem;
  min-height: 1.2rem;
  font-weight: 500;
}

/* ── Legend ── */
.legend ul { list-style: none; }
.legend li {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 0.55rem;
  font-size: 0.84rem;
  color: var(--text-secondary);
}

/* ── Audit Log ── */
.audit-log {
  font-size: 0.84rem;
  max-height: 200px;
  overflow-y: auto;
}

.audit-entry {
  padding: 0.55rem 0.7rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.35rem;
  background: var(--bg);
  border: 1px solid var(--border);
}

.audit-entry.defended { border-left: 3px solid var(--success); }
.audit-entry.attacked { border-left: 3px solid var(--danger); }

.audit-entry strong { color: var(--text); }
.audit-entry .audit-status { font-weight: 600; }
.audit-entry .audit-status.ok { color: var(--success); }
.audit-entry .audit-status.bad { color: var(--danger); }

/* ── Modal ── */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
}

.modal-content {
  width: min(760px, 100%);
  max-height: 82vh;
  overflow-y: auto;
  margin: 0;
  box-shadow: var(--shadow-md);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.modal-header h2 { font-size: 1.05rem; }

.modal-sub {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 0.15rem;
}

/* ── Pipeline Timeline ── */
.pipeline-modal {
  width: min(680px, 100%);
}

.pipeline-timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.pipeline-step {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 0.85rem;
  position: relative;
  padding-bottom: 1.1rem;
}

.pipeline-step:last-child { padding-bottom: 0; }

.pipeline-step:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 36px;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.pipeline-step.status-passed:not(:last-child)::before { background: #bbf7d0; }
.pipeline-step.status-blocked:not(:last-child)::before { background: #fecaca; }
.pipeline-step.status-warning:not(:last-child)::before { background: #fde68a; }

.step-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  font-weight: 700;
  flex-shrink: 0;
  z-index: 1;
  border: 2px solid var(--border);
  background: var(--surface);
}

.pipeline-step.status-passed .step-icon {
  background: var(--success-light);
  border-color: var(--success);
  color: var(--success);
}

.pipeline-step.status-blocked .step-icon {
  background: var(--danger-light);
  border-color: var(--danger);
  color: var(--danger);
}

.pipeline-step.status-warning .step-icon {
  background: var(--warn-light);
  border-color: var(--warn);
  color: var(--warn);
}

.pipeline-step.status-skipped .step-icon {
  background: var(--bg);
  border-color: var(--border);
  color: var(--muted);
}

.step-body {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.9rem;
}

.pipeline-step.status-passed .step-body { border-color: var(--success-border); }
.pipeline-step.status-blocked .step-body { border-color: var(--danger-border); background: var(--danger-light); }
.pipeline-step.status-warning .step-body { border-color: #fde68a; background: var(--warn-light); }
.pipeline-step.status-skipped .step-body { opacity: 0.7; }

.step-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.3rem;
}

.step-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

.step-status-label {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  white-space: nowrap;
}

.step-status-label.passed { background: var(--success-light); color: var(--success); }
.step-status-label.blocked { background: var(--danger-light); color: var(--danger); }
.step-status-label.warning { background: var(--warn-light); color: var(--warn); }
.step-status-label.skipped { background: var(--bg-subtle); color: var(--muted); }

.step-summary {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.step-detail {
  margin-top: 0.55rem;
  padding: 0.55rem 0.7rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.55;
  max-height: 160px;
  overflow-y: auto;
}

.redteam-summary {
  background: var(--primary-light);
  border: 1px solid #bfdbfe;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
  font-size: 0.9rem;
  color: var(--text);
}

.redteam-results { font-size: 0.85rem; }

.redteam-row {
  display: grid;
  grid-template-columns: 72px 56px 1fr 72px 110px;
  gap: 0.5rem;
  padding: 0.5rem 0.6rem;
  border-radius: var(--radius-sm);
  align-items: center;
}

.redteam-row:not(:first-child) {
  border-bottom: 1px solid var(--bg-subtle);
}

.redteam-row:not(:first-child):hover { background: var(--bg); }

.redteam-row.header {
  font-weight: 600;
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  background: var(--bg);
  border-radius: var(--radius-sm);
  margin-bottom: 0.25rem;
}

.redteam-row .pass { color: var(--success); font-weight: 600; }
.redteam-row .fail { color: var(--danger); font-weight: 600; }

/* ── Responsive ── */
@media (max-width: 1200px) {
  .layout { grid-template-columns: 1fr; }
  .compare-grid { grid-template-columns: 1fr; }
  .steps-hint { display: none; }
  .header { flex-wrap: wrap; gap: 0.75rem; }
}

@media (max-width: 600px) {
  .layout { padding: 0.85rem; }
  .header { padding: 0.85rem 1rem; }
}