/* ---------------------------------------------------------------------
   Prompt Injection Explorer — minimal styles
--------------------------------------------------------------------- */

:root {
  --bg: #ffffff;
  --bg-raised: #ffffff;
  --bg-sunken: #f4f4f5;
  --border: #e4e4e7;
  --text: #09090b;
  --text-muted: #71717a;
  --accent: #dc2626;
  --accent-contrast: #ffffff;
  --safe: #16a34a;
  --warn: #d97706;
  --bad: #dc2626;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: "SF Mono", "Menlo", "Consolas", monospace;
  --radius: 10px;
}

:root[data-theme="dark"] {
  --bg: #09090b;
  --bg-raised: #101012;
  --bg-sunken: #18181b;
  --border: #27272a;
  --text: #fafafa;
  --text-muted: #a1a1aa;
  --accent: #ef4444;
  --accent-contrast: #09090b;
  --safe: #22c55e;
  --warn: #f59e0b;
  --bad: #ef4444;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
}

body { line-height: 1.55; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { line-height: 1.25; font-weight: 600; margin: 0 0 0.5em; letter-spacing: -0.01em; }
h1 { font-size: clamp(1.6rem, 3vw, 2.1rem); }
h2 { font-size: 1.2rem; }
h3 { font-size: 1.02rem; }
h4 { font-size: 0.95rem; }
p { margin: 0 0 1em; }
.muted { color: var(--text-muted); }

code {
  font-family: var(--font-mono);
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.1em 0.4em;
  font-size: 0.88em;
}

.icon {
  width: 1em;
  height: 1em;
  flex-shrink: 0;
  vertical-align: -0.15em;
}

/* ---------------------------- Layout ---------------------------- */

.site-header {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.85rem 1.5rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--bg);
  flex-wrap: wrap;
}

.brand { display: flex; align-items: center; gap: 0.6rem; font-weight: 600; white-space: nowrap; font-size: 0.95rem; }
.brand-mark {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  color: var(--accent);
}
.brand-mark .icon { width: 16px; height: 16px; }

.site-nav {
  display: flex;
  gap: 1.1rem;
  flex: 1;
  flex-wrap: wrap;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-muted);
  font-size: 0.88rem;
  font-weight: 500;
  padding: 0.2rem 0;
  border-bottom: 2px solid transparent;
}
.nav-link .icon { width: 16px; height: 16px; }
.nav-link:hover { color: var(--text); text-decoration: none; }
.nav-link.active { color: var(--text); border-color: var(--accent); }

.header-actions { display: flex; gap: 0.4rem; margin-left: auto; }
button.nav-toggle { display: none; }

@media (max-width: 860px) {
  button.nav-toggle { display: inline-flex; }
  .site-nav {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 0.25rem 1rem 0.75rem;
    z-index: 30;
  }
  .site-nav.open { display: flex; }
  .nav-link {
    padding: 0.75rem 0.1rem;
    border-bottom: 1px solid var(--border);
    border-left: 2px solid transparent;
    padding-left: 0.6rem;
  }
  .nav-link:last-child { border-bottom: none; }
  .nav-link.active { border-bottom-color: var(--border); border-left-color: var(--accent); }
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  height: 34px;
  border: 1px solid var(--border);
  background: var(--bg-raised);
  color: var(--text);
  border-radius: 8px;
  padding: 0 0.65rem;
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 600;
  font-family: inherit;
}
.icon-btn:hover { background: var(--bg-sunken); }
.icon-btn .icon { width: 15px; height: 15px; }

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
  min-height: 60vh;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.25rem 1.5rem;
  text-align: center;
}
.site-footer p { max-width: 640px; margin: 0 auto; color: var(--text-muted); font-size: 0.82rem; }

/* ---------------------------- Overview ---------------------------- */

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.hero { padding-bottom: 2rem; }
.lede { font-size: 1.02rem; color: var(--text-muted); max-width: 60ch; }

.hero-actions { display: flex; gap: 0.75rem; margin-top: 1.25rem; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  font-size: 0.9rem;
}
.btn .icon { width: 15px; height: 15px; }
.btn-primary { background: var(--accent); color: var(--accent-contrast); }
.btn-primary:hover { filter: brightness(1.06); text-decoration: none; }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { background: var(--bg-sunken); text-decoration: none; }
.btn-block { width: 100%; justify-content: center; margin-top: 0.75rem; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }

.card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem;
}

.callout {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin: 2rem 0 0;
}

.trifecta { display: flex; align-items: center; gap: 0.6rem; margin: 1.1rem 0; flex-wrap: wrap; }
.trifecta-item {
  flex: 1;
  min-width: 160px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.8rem 0.9rem;
  font-size: 0.88rem;
  font-weight: 500;
}
.trifecta-item .icon { width: 17px; height: 17px; color: var(--accent); }
.trifecta-plus { color: var(--text-muted); font-weight: 600; }
.trifecta-note { font-size: 0.85rem; color: var(--text-muted); margin: 0; }

/* ---------------------------- Page head ---------------------------- */

.page-head { margin-bottom: 2rem; }
.section-title { margin: 2.25rem 0 1rem; }

/* ---------------------------- Categories ---------------------------- */

.card-top { display: flex; align-items: center; gap: 0.6rem; margin-bottom: 0.5rem; }
.card-icon { width: 18px; height: 18px; color: var(--accent); }
.card-top h3 { margin: 0; }

blockquote {
  margin: 0.75rem 0 0;
  padding: 0.5rem 0.8rem;
  border-left: 2px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ---------------------------- Cases ---------------------------- */

.filter-bar { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 1.5rem; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  border-radius: 999px;
  padding: 0.38rem 0.85rem;
  font-size: 0.83rem;
  font-weight: 500;
  cursor: pointer;
}
.chip .icon { width: 14px; height: 14px; }
.chip.active { background: var(--text); border-color: var(--text); color: var(--bg); }
.chip-xs { padding: 0.25rem 0.6rem; font-size: 0.76rem; }

.timeline { display: flex; flex-direction: column; gap: 0.9rem; }

.case-card {
  display: grid;
  grid-template-columns: 82px 1fr;
  gap: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem;
}

.case-date { font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-muted); font-weight: 600; }

.case-tags { display: flex; gap: 0.4rem; flex-wrap: wrap; margin-bottom: 0.6rem; }
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.72rem;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.15rem 0.55rem;
}
.tag .icon { width: 12px; height: 12px; }

.case-body h3 { margin-bottom: 0.35rem; }
.lesson { font-size: 0.88rem; color: var(--text-muted); font-style: italic; }
.source-link { display: inline-flex; align-items: center; gap: 0.3rem; font-size: 0.8rem; }
.source-link .icon { width: 12px; height: 12px; }

@media (max-width: 640px) {
  .case-card { grid-template-columns: 1fr; }
}

/* ---------------------------- Defenses ---------------------------- */

.defense-stack { display: flex; flex-direction: column; gap: 1.75rem; }
.defense-layer-head { display: flex; align-items: baseline; gap: 0.7rem; margin-bottom: 0.9rem; }
.strength { font-size: 0.78rem; color: var(--text-muted); font-weight: 500; }
.small-card { padding: 0.9rem; }
.small-card h4 { margin-bottom: 0.25rem; }
.small-card p { margin: 0; font-size: 0.87rem; color: var(--text-muted); }
.caveat {
  display: flex;
  align-items: flex-start;
  gap: 0.4rem;
  margin-top: 0.9rem;
  font-size: 0.84rem;
  color: var(--text-muted);
}
.caveat .icon { width: 14px; height: 14px; margin-top: 0.2em; flex-shrink: 0; }

/* ---------------------------- Playground ---------------------------- */

.pg-grid { display: grid; grid-template-columns: minmax(300px, 1fr) minmax(300px, 1fr); gap: 1.25rem; align-items: start; }

.pg-config h3 { margin-top: 1.3rem; }
.pg-config h3:first-of-type { margin-top: 0.3rem; }

.scenario-tabs { display: flex; gap: 0.4rem; flex-wrap: wrap; margin-bottom: 0.9rem; }

.system-prompt { margin: 0.6rem 0; display: flex; flex-direction: column; gap: 0.3rem; }
.system-prompt code { display: block; white-space: pre-wrap; padding: 0.55rem 0.75rem; }

.label-sm { display: block; font-size: 0.8rem; color: var(--text-muted); font-weight: 500; margin-bottom: 0.3rem; }

textarea {
  width: 100%;
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 0.65rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  resize: vertical;
}

.try-examples { display: flex; gap: 0.4rem; align-items: center; flex-wrap: wrap; margin-top: 0.6rem; }

.defense-toggles { display: flex; flex-direction: column; gap: 0.5rem; }
.toggle-row {
  display: flex;
  gap: 0.55rem;
  align-items: flex-start;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.55rem 0.7rem;
  cursor: pointer;
}
.toggle-row input { margin-top: 0.25rem; }
.toggle-row strong { display: block; font-size: 0.87rem; font-weight: 500; }
.toggle-row small { color: var(--text-muted); font-size: 0.78rem; }

.pg-output { min-height: 280px; }

.verdict {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  font-size: 0.92rem;
  border: 1px solid currentColor;
}
.verdict .icon { width: 16px; height: 16px; }
.verdict-safe { color: var(--safe); }
.verdict-warn { color: var(--warn); }
.verdict-bad { color: var(--bad); }

.tech-list { list-style: none; padding: 0; margin: 0.5rem 0 1.1rem; display: flex; flex-direction: column; gap: 0.35rem; }
.tech-list li { display: flex; align-items: center; gap: 0.5rem; font-size: 0.87rem; }
.tech-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--bad); flex-shrink: 0; }
.dot-good { background: var(--safe); }

.risk-meter { margin: 1rem 0; }
.risk-bar { height: 6px; background: var(--bg-sunken); border-radius: 999px; overflow: hidden; margin-top: 0.35rem; }
.risk-fill { height: 100%; }
.risk-fill.risk-safe { background: var(--safe); }
.risk-fill.risk-warn { background: var(--warn); }
.risk-fill.risk-bad { background: var(--bad); }

.transcript { margin-top: 1.1rem; display: flex; flex-direction: column; gap: 0.5rem; }
.transcript-row {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.6rem 0.8rem;
  font-size: 0.84rem;
}
.transcript-row strong { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.03em; color: var(--text-muted); font-weight: 600; }
.transcript-row span { font-family: var(--font-mono); white-space: pre-wrap; word-break: break-word; }

/* ---------------------------- Quiz ---------------------------- */

.quiz-card { max-width: 600px; }
.quiz-options { display: flex; flex-direction: column; gap: 0.5rem; margin: 1.1rem 0; }
.quiz-option {
  text-align: left;
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  font-size: 0.9rem;
}
.quiz-option:hover:not(:disabled) { border-color: var(--text-muted); }
.quiz-option:disabled { cursor: default; }
.option-correct { border-color: var(--safe); color: var(--safe); }
.option-wrong { border-color: var(--bad); color: var(--bad); }

.quiz-explain { display: flex; align-items: flex-start; gap: 0.4rem; padding: 0.8rem 0; font-size: 0.88rem; }
.quiz-explain .icon { width: 15px; height: 15px; margin-top: 0.2em; flex-shrink: 0; }
.quiz-correct { color: var(--safe); }
.quiz-incorrect { color: var(--bad); }

/* ---------------------------- Responsive ---------------------------- */

@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .pg-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .site-header { padding: 0.7rem 1rem; }
  main { padding: 1.5rem 1rem 3rem; }
  .brand-name { display: none; }
}