/* ============ XSS LAB SPECIFIC STYLES ============ */

.lab-header {
  padding: 4rem 0 2.5rem;
  border-bottom: 1px solid var(--line-black);
  margin: 0 auto 2.5rem;
  position: relative;
  max-width: 1080px;
  padding-left: 2rem;
  padding-right: 2rem;
}
.lab-header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 2rem;
  width: 60px;
  height: 3px;
  background: var(--accent);
}
.lab-header .lab-num-big {
  font-family: var(--font-display);
  font-size: clamp(56px, 8vw, 96px);
  font-weight: 400;
  font-style: italic;
  color: var(--text);
  line-height: 0.92;
  margin-bottom: 0.6rem;
  letter-spacing: -0.04em;
  font-variation-settings: 'opsz' 144;
}
.lab-header .lab-title {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.5rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-variation-settings: 'opsz' 60;
}
.lab-header .lab-en {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 15.5px;
  color: var(--text-soft);
  font-weight: 400;
  font-variation-settings: 'opsz' 36;
}

.lab-content {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 2rem 5rem;
}

.lab-section {
  margin-bottom: 2.5rem;
}
.lab-section .section-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 0.7rem;
}
.lab-section .section-content p {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text);
  margin-bottom: 0.8rem;
}
.lab-section .section-content.mission p {
  font-size: 15.5px;
  font-weight: 400;
  color: var(--text);
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-left: 2px solid var(--accent);
  padding: 14px 20px;
  border-radius: var(--radius);
  margin: 0;
}

/* Input row */
.lab-input-row {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.lab-input-row label {
  font-size: 13px;
  color: var(--text);
  flex-basis: 100%;
  margin-bottom: 4px;
  font-weight: 500;
}
.lab-input-row textarea {
  flex: 1;
  min-width: 280px;
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 10px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  resize: vertical;
  line-height: 1.5;
}
.lab-input-row textarea:focus {
  outline: none;
  border-color: var(--text);
}
.lab-input-row button.primary {
  padding: 10px 22px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  background: var(--text);
  color: var(--bg);
  border: 1px solid var(--text);
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 500;
  transition: all 0.18s;
  align-self: flex-end;
}
.lab-input-row button.primary:hover {
  background: var(--accent);
  border-color: var(--accent);
}

.lab-url-bar {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-faint);
  background: var(--bg-deep);
  color: var(--text-on-dark);
  padding: 8px 14px;
  border-radius: var(--radius);
  word-break: break-all;
  line-height: 1.6;
}

/* Split view: iframe + simulator */
.split-view {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
@media (max-width: 900px) {
  .split-view { grid-template-columns: 1fr; }
}

.split-left, .split-right {
  display: flex;
  flex-direction: column;
}

.iframe-wrapper {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}
.iframe-bar {
  background: var(--bg-elev);
  padding: 6px 14px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-faint);
}
.iframe-bar .iframe-domain {
  display: inline-block;
}
.iframe-bar .iframe-domain::before {
  content: '🔒 ';
  font-size: 9px;
  margin-right: 4px;
}
.iframe-wrapper iframe {
  width: 100%;
  height: 480px;
  border: 0;
  display: block;
  background: #fdfcf8;
}

.success-banner {
  margin-top: 12px;
  padding: 12px 18px;
  background: rgba(40, 130, 90, 0.1);
  border: 1px solid var(--ok);
  border-left: 3px solid var(--ok);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--text);
}
.success-banner.hidden {
  display: none;
}
.success-banner strong {
  color: var(--ok);
}
.success-banner span {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-soft);
}

/* Simulator */
.sim-block {
  margin-bottom: 16px;
  padding: 14px 16px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.sim-block-title {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 8px;
}
.sim-code {
  background: var(--bg-deep);
  color: var(--text-on-dark);
  padding: 10px 14px;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.65;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
}
.sim-code.bad {
  border-left: 2px solid var(--danger);
}
.sim-note {
  font-size: 12px;
  color: var(--text-faint);
  margin-top: 8px;
  line-height: 1.6;
}

.sim-findings {
  list-style: none;
  margin: 0;
  padding: 0;
}
.sim-findings .finding {
  font-size: 12.5px;
  padding: 10px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  margin-bottom: 8px;
  line-height: 1.6;
}
.sim-findings .finding strong {
  font-size: 13px;
  color: var(--text);
}
.sim-findings .finding.danger {
  border-left: 2px solid var(--danger);
  background: rgba(201, 64, 94, 0.06);
}
.sim-findings .finding.warn {
  border-left: 2px solid var(--warn);
  background: rgba(244, 197, 122, 0.08);
}
.sim-findings .finding.safe {
  border-left: 2px solid var(--ok);
  background: rgba(40, 130, 90, 0.06);
}

/* Hints */
.hint-item {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 16px;
  margin-bottom: 8px;
}
.hint-item summary {
  cursor: pointer;
  font-size: 13px;
  color: var(--text);
  font-weight: 500;
  outline: none;
  user-select: none;
}
.hint-item summary:hover { color: var(--accent); }
.hint-item[open] summary { margin-bottom: 8px; padding-bottom: 8px; border-bottom: 1px solid var(--line); }
.hint-item p { font-size: 13px; line-height: 1.7; color: var(--text-soft); margin-bottom: 0.5rem; }
.hint-item p:last-child { margin-bottom: 0; }
.hint-item pre {
  background: var(--bg-deep);
  color: var(--text-on-dark);
  padding: 10px 14px;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  margin-top: 0.5rem;
  overflow-x: auto;
}
.hint-item code {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--bg-deep);
  color: var(--text-on-dark);
  padding: 2px 6px;
  border-radius: 2px;
}
.hint-item.solution summary { color: var(--accent); }

.lab-bottom-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 4rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--line-black);
  font-family: var(--font-mono);
  font-size: 11.5px;
  gap: 1rem;
}
.lab-bottom-nav a {
  color: var(--text-soft);
  flex: 1;
}
.lab-bottom-nav a.next { text-align: right; }
.lab-bottom-nav a:hover { color: var(--accent); }
.lab-bottom-nav a.disabled { color: var(--text-faint); pointer-events: none; }
.lab-bottom-nav .prev::before { content: '←  '; font-family: var(--font-display); font-style: italic; }
.lab-bottom-nav .next::after { content: '  →'; font-family: var(--font-display); font-style: italic; }

.lab-note {
  margin-top: 10px;
  padding: 8px 12px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 12px;
  color: var(--text-soft);
  line-height: 1.6;
}
.lab-note strong { color: var(--text); }

.reset-btn {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 4px 10px;
  background: transparent;
  color: var(--text-soft);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.18s;
}
.reset-btn:hover {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}