/* ============================================
   CVSS Calculator — Techclick Infosec brand CSS
   Royal Blue #1E3A8A, Black #0A0A0A, Disc Cyan #6BC6E8, Disc Magenta #E89BC1
   ============================================ */

:root {
  --tc-royal: #1E3A8A;
  --tc-navy: #0F1E4D;
  --tc-black: #0A0A0A;
  --tc-cyan: #6BC6E8;
  --tc-magenta: #E89BC1;
  --tc-mist: #F4F6FB;
  --tc-success: #10B981;
  --tc-warn: #F59E0B;
  --tc-danger: #EF4444;
  --tc-border: #E2E8F0;
  --tc-muted: #6B7280;
  --tc-grad: linear-gradient(135deg, #6BC6E8 0%, #E89BC1 100%);
  --tc-shadow: 0 4px 14px rgba(15,30,77,0.08);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 15px;
  color: var(--tc-black);
  background: #fff;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

code, .tc-mono, .tc-mono td, .tc-mono th {
  font-family: 'JetBrains Mono', ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.9em;
}

/* ─────────── header ─────────── */
.tc-header {
  background: #fff;
  border-bottom: 1px solid var(--tc-border);
  position: relative;
}
.tc-header::before {
  content: '';
  display: block;
  height: 4px;
  background: var(--tc-grad);
}
.tc-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 18px 24px 14px;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.tc-brand svg { height: 44px; width: auto; display: block; }
.tc-title h1 {
  margin: 0;
  font-family: 'Poppins', sans-serif;
  font-size: 26px;
  font-weight: 700;
  color: var(--tc-royal);
  letter-spacing: -0.01em;
}
.tc-pill {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  background: var(--tc-grad);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  vertical-align: middle;
  margin-left: 6px;
  letter-spacing: 0.02em;
}
.tc-title p {
  margin: 4px 0 0;
  color: var(--tc-muted);
  font-size: 14px;
}

.tc-tab-row {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: thin;
}
.tc-tab {
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  padding: 12px 16px;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 14px;
  color: var(--tc-muted);
  cursor: pointer;
  white-space: nowrap;
  transition: color .15s, border-color .15s;
}
.tc-tab:hover { color: var(--tc-royal); }
.tc-tab[aria-selected="true"] {
  color: var(--tc-royal);
  border-bottom-color: var(--tc-royal);
}

/* ─────────── main panels ─────────── */
.tc-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}
.tc-panel { display: block; }
.tc-panel[hidden] { display: none; }

.tc-h2 {
  font-family: 'Poppins', sans-serif;
  font-size: 20px;
  font-weight: 600;
  color: var(--tc-royal);
  margin: 0 0 4px;
}
.tc-h2 .tc-sub {
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  color: var(--tc-muted);
  font-weight: 500;
}
.tc-section-title {
  margin-top: 18px;
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  color: var(--tc-royal);
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ─────────── version switch ─────────── */
.tc-version-switch {
  display: inline-flex;
  background: var(--tc-mist);
  border-radius: 8px;
  padding: 4px;
  margin-bottom: 18px;
  gap: 4px;
}
.tc-version-switch label {
  padding: 6px 14px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  color: var(--tc-muted);
}
.tc-version-switch label:has(input:checked) {
  background: #fff;
  color: var(--tc-royal);
  box-shadow: var(--tc-shadow);
}
.tc-version-switch input { display: none; }

/* ─────────── calc layout ─────────── */
.tc-calc-layout {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 24px;
}
@media (max-width: 920px) {
  .tc-calc-layout { grid-template-columns: 1fr; }
}

.tc-metric {
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--tc-border);
}
.tc-metric:last-child { border-bottom: none; }
.tc-metric-label {
  font-weight: 600;
  margin-bottom: 8px;
  font-size: 14px;
}
.tc-info {
  display: inline-flex;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--tc-cyan);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  align-items: center;
  justify-content: center;
  cursor: help;
  margin-left: 4px;
}
.tc-options {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.tc-options button {
  flex: 1 1 auto;
  min-width: 80px;
  padding: 8px 12px;
  border: 1.5px solid var(--tc-border);
  background: #fff;
  border-radius: 6px;
  font-family: 'Inter', sans-serif;
  font-weight: 500;
  font-size: 13px;
  color: var(--tc-black);
  cursor: pointer;
  transition: all .12s;
}
.tc-options button:hover { border-color: var(--tc-royal); }
.tc-options button.is-selected {
  background: var(--tc-royal);
  color: #fff;
  border-color: var(--tc-royal);
  box-shadow: var(--tc-shadow);
}

.tc-advanced {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px dashed var(--tc-border);
}
.tc-advanced summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--tc-royal);
  list-style: none;
  font-size: 14px;
}
.tc-advanced summary::before {
  content: "▸ ";
  font-size: 12px;
}
.tc-advanced[open] summary::before { content: "▾ "; }

.tc-adv-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 12px;
}
@media (max-width: 700px) {
  .tc-adv-grid { grid-template-columns: 1fr; }
}
.tc-adv-grid .tc-metric { border-bottom: none; padding-bottom: 0; margin-bottom: 0; }

/* ─────────── result card ─────────── */
.tc-result-col { position: sticky; top: 16px; align-self: flex-start; }
.tc-score-card {
  background: var(--tc-mist);
  border: 1px solid var(--tc-border);
  border-radius: 12px;
  padding: 24px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--tc-shadow);
}
.tc-score-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: var(--tc-grad);
}
.tc-score-num {
  font-family: 'Poppins', sans-serif;
  font-size: 64px;
  font-weight: 800;
  color: var(--tc-royal);
  line-height: 1;
  letter-spacing: -0.04em;
}
.tc-score-sev {
  font-family: 'Poppins', sans-serif;
  font-size: 18px;
  font-weight: 700;
  margin-top: 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--tc-muted);
}
.tc-score-sev[data-sev="none"] { color: var(--tc-muted); }
.tc-score-sev[data-sev="low"] { color: var(--tc-success); }
.tc-score-sev[data-sev="medium"] { color: var(--tc-warn); }
.tc-score-sev[data-sev="high"] { color: #DC2626; }
.tc-score-sev[data-sev="critical"] { color: var(--tc-danger); font-weight: 800; }

.tc-vector-line {
  margin-top: 16px;
  display: flex;
  gap: 6px;
  background: #fff;
  padding: 8px;
  border-radius: 6px;
  border: 1px solid var(--tc-border);
  align-items: center;
}
.tc-vector-line code {
  flex: 1 1 auto;
  font-size: 11px;
  overflow: auto;
  white-space: nowrap;
  text-align: left;
  padding: 4px;
  color: var(--tc-navy);
}
.tc-copy {
  border: none;
  background: var(--tc-royal);
  color: #fff;
  padding: 6px 10px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
}
.tc-score-meta {
  margin-top: 12px;
  font-size: 12px;
  color: var(--tc-muted);
  text-align: left;
  line-height: 1.55;
}
.tc-score-meta strong { color: var(--tc-navy); }

.tc-quick-actions {
  margin-top: 14px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* ─────────── callouts ─────────── */
.tc-callout {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 8px;
  font-size: 13px;
  line-height: 1.5;
}
.tc-callout strong { font-family: 'Poppins', sans-serif; }
.tc-callout p { margin: 4px 0 0; }
.tc-callout-tip {
  background: #EAF7FC;
  border-left: 3px solid var(--tc-cyan);
}
.tc-callout-warn {
  background: #FCEEF4;
  border-left: 3px solid var(--tc-magenta);
}

/* ─────────── buttons ─────────── */
.tc-btn {
  padding: 9px 16px;
  border-radius: 6px;
  border: 1.5px solid var(--tc-royal);
  background: #fff;
  color: var(--tc-royal);
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  transition: all .12s;
}
.tc-btn:hover { background: var(--tc-mist); }
.tc-btn-primary {
  background: var(--tc-royal);
  color: #fff;
}
.tc-btn-primary:hover { background: var(--tc-navy); }
.tc-btn-ghost {
  border-color: var(--tc-border);
  color: var(--tc-muted);
}

/* ─────────── search/cve ─────────── */
.tc-search-row {
  display: flex;
  gap: 8px;
  margin: 16px 0;
  flex-wrap: wrap;
}
.tc-search-row input {
  flex: 1 1 280px;
  padding: 10px 14px;
  border: 1.5px solid var(--tc-border);
  border-radius: 6px;
  font-size: 14px;
  font-family: 'Inter', sans-serif;
}
.tc-search-row input:focus {
  outline: none;
  border-color: var(--tc-royal);
}

.tc-cve-result { margin-top: 12px; }
.tc-cve-card {
  border: 1px solid var(--tc-border);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 12px;
  background: #fff;
  box-shadow: var(--tc-shadow);
}
.tc-cve-card h3 {
  margin: 0 0 6px;
  font-family: 'Poppins', sans-serif;
  font-size: 16px;
  color: var(--tc-royal);
}
.tc-cve-card .tc-cve-meta {
  font-size: 12px;
  color: var(--tc-muted);
  margin-bottom: 8px;
}
.tc-cve-card .tc-cve-desc {
  font-size: 13px;
  line-height: 1.55;
  color: var(--tc-black);
  margin-bottom: 10px;
}
.tc-cve-scores {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.tc-cve-score-chip {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  padding: 4px 8px;
  border-radius: 4px;
  background: var(--tc-mist);
  color: var(--tc-navy);
  border: 1px solid var(--tc-border);
}
.tc-cve-card a.tc-cve-link {
  font-size: 12px;
  font-weight: 600;
}
.tc-cve-load {
  border: none;
  background: var(--tc-cyan);
  color: #fff;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  margin-left: 8px;
}

/* ─────────── parser ─────────── */
#parserInput {
  width: 100%;
  padding: 12px;
  border: 1.5px solid var(--tc-border);
  border-radius: 6px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  margin: 12px 0 8px;
  resize: vertical;
}
.tc-parser-out {
  margin-top: 14px;
}
.tc-parser-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
  background: #fff;
}
.tc-parser-table th, .tc-parser-table td {
  padding: 8px 12px;
  border: 1px solid var(--tc-border);
  text-align: left;
  font-size: 13px;
}
.tc-parser-table th {
  background: var(--tc-royal);
  color: #fff;
  font-weight: 600;
}
.tc-parser-table tr:nth-child(even) td {
  background: var(--tc-mist);
}

/* ─────────── practice ─────────── */
.tc-practice-area { margin-top: 16px; }
.tc-practice-card {
  background: #fff;
  border: 1px solid var(--tc-border);
  border-radius: 10px;
  padding: 18px;
  margin-bottom: 14px;
  box-shadow: var(--tc-shadow);
}
.tc-practice-card h3 {
  margin: 0 0 8px;
  font-family: 'Poppins', sans-serif;
  color: var(--tc-royal);
}
.tc-practice-card .tc-scenario {
  background: var(--tc-mist);
  padding: 12px;
  border-radius: 6px;
  font-size: 14px;
  border-left: 3px solid var(--tc-royal);
}
.tc-practice-card .tc-practice-prompt {
  margin-top: 10px;
  font-weight: 600;
  font-size: 13px;
}
.tc-practice-input {
  display: flex;
  gap: 8px;
  margin: 8px 0;
  flex-wrap: wrap;
}
.tc-practice-input input {
  flex: 1 1 200px;
  padding: 8px 12px;
  border: 1.5px solid var(--tc-border);
  border-radius: 6px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
}
.tc-practice-feedback {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 6px;
  font-size: 13px;
  display: none;
}
.tc-practice-feedback.ok {
  background: #ECFDF5;
  border-left: 3px solid var(--tc-success);
  color: #065F46;
  display: block;
}
.tc-practice-feedback.close {
  background: #FFFBEB;
  border-left: 3px solid var(--tc-warn);
  color: #92400E;
  display: block;
}
.tc-practice-feedback.wrong {
  background: #FEF2F2;
  border-left: 3px solid var(--tc-danger);
  color: #991B1B;
  display: block;
}

/* ─────────── cheatsheet ─────────── */
.tc-cheat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 16px;
}
.tc-cheat-card {
  background: #fff;
  border: 1px solid var(--tc-border);
  border-top: 3px solid var(--tc-royal);
  border-radius: 8px;
  padding: 16px;
  font-size: 13px;
}
.tc-cheat-card h3 {
  margin: 0 0 10px;
  font-family: 'Poppins', sans-serif;
  font-size: 15px;
  color: var(--tc-royal);
}
.tc-cheat-card ul { margin: 0; padding-left: 18px; }
.tc-cheat-card li { margin-bottom: 4px; line-height: 1.5; }
.tc-cheat-card table { width: 100%; border-collapse: collapse; }
.tc-cheat-card td, .tc-cheat-card th { padding: 4px 6px; }

.tc-sev {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.tc-sev-none { background: #E5E7EB; color: #374151; }
.tc-sev-low { background: #D1FAE5; color: #065F46; }
.tc-sev-med { background: #FEF3C7; color: #92400E; }
.tc-sev-high { background: #FECACA; color: #991B1B; }
.tc-sev-crit { background: var(--tc-danger); color: #fff; }

.tc-help {
  color: var(--tc-muted);
  font-size: 13px;
  margin: 4px 0 16px;
}

/* ─────────── footer ─────────── */
.tc-footer {
  margin-top: 48px;
  background: var(--tc-royal);
  color: #fff;
}
.tc-footer-strip {
  height: 4px;
  background: var(--tc-grad);
}
.tc-footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  font-size: 13px;
}
.tc-footer-inner a {
  color: #fff;
  text-decoration: underline;
  text-decoration-color: var(--tc-cyan);
  text-underline-offset: 3px;
}
.tc-footer-copy {
  font-size: 11px;
  opacity: 0.85;
  grid-column: 1 / -1;
  text-align: center;
  padding-top: 12px;
  border-top: 1px solid rgba(255,255,255,0.15);
}

.tc-loading {
  text-align: center;
  color: var(--tc-muted);
  padding: 24px;
}
.tc-error {
  background: #FEF2F2;
  border: 1px solid var(--tc-danger);
  color: #991B1B;
  padding: 12px;
  border-radius: 6px;
}