/* ============================================================
   CIPHERLAB · 口令猜测教学演示 · 视觉系统
   Aesthetic: Hacker Terminal × Editorial × subtle AI motifs
   两套主题：
     - dark   : 深 ink 画布 + 酸绿主色（默认）
     - light  : 暖珀珀纸 + 深苔绿主色
   ============================================================ */

:root,
[data-theme="dark"] {
  --bg:         #0a0d12;        /* canvas */
  --bg-2:       #11151c;
  --bg-3:       #161b24;
  --bg-input:   #0a0d12;

  --line:       rgba(255,255,255,0.08);
  --line-2:     rgba(255,255,255,0.16);
  --line-soft:  rgba(255,255,255,0.04);
  --line-dash:  rgba(255,255,255,0.12);

  --text:       #e6ecef;
  --text-2:     #9aa3ad;
  --text-3:     #5d6571;
  --muted:      #4a525d;

  --acid:       #c9ff3a;        /* primary action */
  --acid-soft:  rgba(201,255,58,0.12);
  --acid-glow:  rgba(201,255,58,0.32);
  --signal-bad: #ff5860;
  --signal-warn:#ffb84a;

  --c-dictionary: #6cd4ff;
  --c-mangling:   #c89bff;
  --c-bruteforce: #ff8a3d;
  --c-markov:     #4cd9b6;
  --c-llm:        #ff5fa8;

  --shadow-card: 0 1px 0 rgba(255,255,255,0.04) inset,
                 0 12px 40px rgba(0,0,0,0.55);
  --shadow-card-hover: 0 1px 0 rgba(255,255,255,0.06) inset,
                       0 16px 48px rgba(0,0,0,0.7);

  --selection-bg: var(--acid);
  --selection-fg: #0a0d12;

  --grid-color: rgba(255,255,255,0.04);
  --halo-1: rgba(201,255,58,0.06);
  --halo-2: rgba(255,95,168,0.06);
  --node-stroke: rgba(201,255,58,0.18);
  --node-fill:   rgba(201,255,58,0.6);
}

[data-theme="light"] {
  /* paper-warm light hacker theme */
  --bg:         #f4efe4;        /* aged terminal paper */
  --bg-2:       #ebe4d3;
  --bg-3:       #e1d8c2;
  --bg-input:   #fbf7ec;

  --line:       rgba(36,42,32,0.14);
  --line-2:     rgba(36,42,32,0.26);
  --line-soft:  rgba(36,42,32,0.07);
  --line-dash:  rgba(36,42,32,0.18);

  --text:       #1a1f17;
  --text-2:     #4a5345;
  --text-3:     #7a8174;
  --muted:      #a09d8d;

  --acid:       #2d6a4f;        /* deep moss-green CRT */
  --acid-soft:  rgba(45,106,79,0.12);
  --acid-glow:  rgba(45,106,79,0.30);
  --signal-bad: #b53d3d;
  --signal-warn:#b06a1c;

  --c-dictionary: #1d4ed8;       /* deep cyan */
  --c-mangling:   #6d28d9;       /* deep violet */
  --c-bruteforce: #b45309;       /* burnt amber */
  --c-markov:     #047857;       /* deep teal */
  --c-llm:        #be185d;       /* deep magenta */

  --shadow-card: 0 1px 0 rgba(255,255,255,0.7) inset,
                 0 1px 2px rgba(36,42,32,0.06),
                 0 8px 24px rgba(36,42,32,0.06);
  --shadow-card-hover: 0 1px 0 rgba(255,255,255,0.7) inset,
                       0 12px 32px rgba(36,42,32,0.10);

  --selection-bg: var(--acid);
  --selection-fg: #f4efe4;

  --grid-color: rgba(36,42,32,0.045);
  --halo-1: rgba(45,106,79,0.05);
  --halo-2: rgba(190,24,93,0.04);
  --node-stroke: rgba(45,106,79,0.22);
  --node-fill:   rgba(45,106,79,0.5);
}

:root {
  --radius-card: 14px;
  --radius-pill: 999px;

  --display: "Fraunces", "Noto Serif SC", Georgia, serif;
  --mono:    "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --body:    -apple-system, BlinkMacSystemFont, "PingFang SC",
             "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
}

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

html, body { height: 100%; }
body {
  font-family: var(--body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: var(--acid); color: var(--bg); }

a { color: inherit; text-decoration: none; }

/* ================== Background atmosphere ================== */

.bg-grid {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 30%, transparent 85%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 30%, transparent 85%);
}
.bg-scan {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    repeating-linear-gradient(180deg,
      transparent 0 3px,
      var(--line-soft) 3px 4px);
  opacity: 0.5;
}
body::after {
  content: "";
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background: radial-gradient(1200px 600px at 80% 0%, var(--halo-1), transparent 60%),
              radial-gradient(900px 500px at 0% 100%, var(--halo-2), transparent 60%);
}

/* AI motif: tiny neural-node pattern in top-right corner of the page */
.bg-nodes {
  position: fixed; top: 0; right: 0;
  width: 320px; height: 320px;
  z-index: 0; pointer-events: none;
  opacity: 0.55;
  mask-image: radial-gradient(circle at 80% 20%, #000 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(circle at 80% 20%, #000 0%, transparent 70%);
}
.bg-nodes svg { width: 100%; height: 100%; }
.bg-nodes line { stroke: var(--node-stroke); stroke-width: 0.6; }
.bg-nodes circle { fill: var(--node-fill); }
.bg-nodes circle.pulse {
  animation: node-pulse 3.6s ease-in-out infinite;
}
.bg-nodes circle.pulse:nth-child(2) { animation-delay: 0.6s; }
.bg-nodes circle.pulse:nth-child(3) { animation-delay: 1.2s; }
.bg-nodes circle.pulse:nth-child(4) { animation-delay: 1.8s; }
.bg-nodes circle.pulse:nth-child(5) { animation-delay: 2.4s; }
@keyframes node-pulse {
  0%, 100% { opacity: 0.35; r: 1.8; }
  50%      { opacity: 1;    r: 3.2; }
}

/* ================== Topbar ================== */

.topbar {
  position: sticky; top: 0; z-index: 50;
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-rows: auto auto;
  align-items: center;
  gap: 8px 32px;
  padding: 18px 36px 0;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--line);
}
.brand {
  display: inline-flex; align-items: baseline; gap: 10px;
  grid-column: 1;
}
.brand-mark {
  font-family: var(--mono);
  color: var(--acid);
  font-size: 18px;
  text-shadow: 0 0 12px var(--acid-glow);
  transform: translateY(1px);
  animation: brand-blink 2.4s steps(2, end) infinite;
}
@keyframes brand-blink {
  0%, 88%, 100% { opacity: 1; }
  92%, 96%      { opacity: 0.35; }
}
.brand-name {
  font-family: var(--display);
  font-weight: 900;
  font-size: 22px;
  letter-spacing: -0.02em;
  font-variation-settings: "opsz" 144;
}
.brand-name-accent {
  font-style: italic;
  font-weight: 500;
  color: var(--acid);
}
.brand-sub {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-3);
  text-transform: uppercase;
  margin-left: 6px;
}

.modes {
  grid-column: 2 / 4;
  justify-self: end;
  display: inline-flex; align-items: center; gap: 4px;
}
.mode-link, .settings-link {
  position: relative;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 14px 10px 12px;
  border-radius: 10px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--text-2);
  transition: color 0.18s, background 0.18s;
}
.mode-link:hover, .settings-link:hover {
  color: var(--text);
  background: var(--line-soft);
}
.mode-num {
  font-family: var(--mono); font-size: 10px; font-weight: 700;
  color: var(--text-3);
  padding: 2px 5px; border: 1px solid var(--line-2); border-radius: 4px;
}
.mode-label { letter-spacing: 0.14em; }
.mode-link.active {
  color: var(--bg);
  background: var(--acid);
  box-shadow: 0 0 0 1px var(--acid-glow),
              0 0 24px var(--acid-glow);
}
.mode-link.active .mode-num {
  color: var(--bg); border-color: rgba(0,0,0,0.25);
  background: rgba(0,0,0,0.08);
}
[data-theme="light"] .mode-link.active { color: #f4efe4; }
[data-theme="light"] .mode-link.active .mode-num {
  color: #f4efe4; border-color: rgba(244,239,228,0.35);
  background: rgba(244,239,228,0.15);
}

.settings-link {
  margin-left: 6px;
  border: 1px solid var(--line-2);
}
.settings-link .cog { color: var(--text-3); transition: transform 0.4s; display: inline-block; }
.settings-link:hover .cog { transform: rotate(90deg); color: var(--acid); }

.llm-badge {
  font-family: var(--mono);
  display: inline-block;
  margin-left: 6px;
  padding: 1px 8px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 999px;
  background: color-mix(in srgb, var(--signal-bad) 14%, transparent);
  color: var(--signal-bad);
  border: 1px solid color-mix(in srgb, var(--signal-bad) 32%, transparent);
}
.llm-badge.ok {
  background: color-mix(in srgb, var(--c-markov) 14%, transparent);
  color: var(--c-markov);
  border-color: color-mix(in srgb, var(--c-markov) 36%, transparent);
}

/* Theme toggle button */
.theme-toggle {
  margin-left: 4px;
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px;
  border-radius: 10px;
  border: 1px solid var(--line-2);
  background: transparent;
  color: var(--text-2);
  cursor: pointer;
  font-family: var(--mono);
  font-size: 14px;
  transition: color 0.18s, background 0.18s, border-color 0.18s, transform 0.3s;
}
.theme-toggle:hover {
  color: var(--acid);
  border-color: var(--acid);
  background: var(--acid-soft);
}
.theme-toggle .icon { transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1); display: inline-block; }
.theme-toggle:hover .icon { transform: rotate(360deg); }

.topbar-rule {
  grid-column: 1 / -1;
  display: flex; align-items: stretch;
  height: 6px;
  margin: 14px -36px 0;
  gap: 1px;
  border-top: 1px solid var(--line);
}
.rule-tick { flex: 1; opacity: 0.55; }
.rule-tick[data-c="dictionary"] { background: var(--c-dictionary); }
.rule-tick[data-c="mangling"]   { background: var(--c-mangling); }
.rule-tick[data-c="bruteforce"] { background: var(--c-bruteforce); }
.rule-tick[data-c="markov"]     { background: var(--c-markov); }
.rule-tick[data-c="llm"]        { background: var(--c-llm); }

/* ================== Layout & generic card ================== */

main {
  position: relative; z-index: 1;
  max-width: 1180px;
  margin: 48px auto 96px;
  padding: 0 36px;
  display: grid;
  gap: 22px;
}

.card {
  position: relative;
  background: linear-gradient(180deg, var(--bg-2) 0%, var(--bg-3) 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 28px 32px;
  box-shadow: var(--shadow-card);
}
.card::before {
  /* hairline corner mark — subtle editorial detail */
  content: "";
  position: absolute; top: 10px; left: 10px;
  width: 12px; height: 12px;
  border-top: 1px solid var(--line-2);
  border-left: 1px solid var(--line-2);
  pointer-events: none;
}
.card::after {
  content: "";
  position: absolute; bottom: 10px; right: 10px;
  width: 12px; height: 12px;
  border-bottom: 1px solid var(--line-2);
  border-right: 1px solid var(--line-2);
  pointer-events: none;
}

.card h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 24px;
  letter-spacing: -0.01em;
  margin-bottom: 18px;
  color: var(--text);
  display: flex; align-items: baseline; gap: 12px;
}
.card h2::before {
  content: attr(data-eyebrow, "");
}
/* eyebrow label above h2, set in JS-rendered cards using <span class="eyebrow"> */
.eyebrow {
  display: inline-block;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--acid);
  padding: 2px 8px;
  margin-bottom: 12px;
  border: 1px solid color-mix(in srgb, var(--acid) 40%, transparent);
  border-radius: 4px;
  background: var(--acid-soft);
}

/* ================== Form fields ================== */

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 18px;
}
.row label, .field label {
  display: flex; align-items: center; gap: 6px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 6px;
}
.row input, .row select, .row textarea,
.field input, .field select, .field textarea {
  width: 100%;
  padding: 11px 14px;
  background: var(--bg-input);
  color: var(--text);
  border: 1px solid var(--line-2);
  border-radius: 10px;
  font-family: var(--mono);
  font-size: 13.5px;
  transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
}
.row input::placeholder, .field input::placeholder {
  color: var(--muted);
}
.row input:focus, .row select:focus, .row textarea:focus,
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--acid);
  box-shadow: 0 0 0 4px var(--acid-soft);
}
.row select, .field select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--text-2) 50%),
                    linear-gradient(135deg, var(--text-2) 50%, transparent 50%);
  background-position: calc(100% - 18px) 50%, calc(100% - 13px) 50%;
  background-size: 5px 5px;
  background-repeat: no-repeat;
  padding-right: 36px;
}

.warn {
  font-family: var(--mono);
  color: var(--signal-warn);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  margin-top: 6px;
  opacity: 0.85;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--acid); color: var(--bg);
  border: 0;
  padding: 12px 20px;
  border-radius: 10px;
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: transform 0.12s, box-shadow 0.18s, filter 0.15s;
  box-shadow: 0 0 0 1px var(--acid-glow),
              0 8px 24px var(--acid-soft);
}
.btn:hover { transform: translateY(-1px); filter: brightness(1.05);
             box-shadow: 0 0 0 1px var(--acid-glow),
                         0 12px 28px var(--acid-glow); }
.btn:active { transform: translateY(0); }
.btn:disabled { background: var(--bg-3); color: var(--muted);
                box-shadow: none; cursor: not-allowed; }
[data-theme="light"] .btn { color: #f4efe4; }
[data-theme="light"] .btn:disabled { color: var(--muted); }
.btn-ghost {
  background: transparent; color: var(--text-2);
  border: 1px solid var(--line-2);
  box-shadow: none;
}
.btn-ghost:hover { color: var(--text); background: var(--line-soft);
                   border-color: var(--line-2); box-shadow: none; }
[data-theme="light"] .btn-ghost:hover { color: var(--acid); }

/* ================== Method pills ================== */

.method-pills {
  display: flex; flex-wrap: wrap; gap: 8px;
}
.method-pills label {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--line-2);
  background: var(--bg-input);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-2);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.method-pills label:hover {
  color: var(--text);
  border-color: var(--acid);
}
.method-pills input[type="checkbox"] {
  appearance: none;
  width: 14px; height: 14px;
  border: 1px solid var(--line-2);
  border-radius: 3px;
  background: transparent;
  display: inline-grid; place-content: center;
  cursor: pointer;
  flex-shrink: 0;
}
.method-pills input[type="checkbox"]:checked {
  background: var(--acid); border-color: var(--acid);
}
.method-pills input[type="checkbox"]:checked::after {
  content: ""; width: 8px; height: 4px;
  border-left: 2px solid var(--bg); border-bottom: 2px solid var(--bg);
  transform: rotate(-45deg) translate(0px, -1px);
}
.method-pills input:disabled + .display-name { opacity: 0.4; }

/* ================== Race visualization ================== */

.race { display: grid; gap: 14px; }
.race-row {
  display: grid;
  grid-template-columns: 200px 1fr 130px;
  align-items: center;
  gap: 14px;
}
.race-name {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-2);
}
.race-name::before {
  content: "";
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--c-dictionary);
  box-shadow: 0 0 10px currentColor;
}
.race-row.dictionary .race-name::before { background: var(--c-dictionary); color: var(--c-dictionary); }
.race-row.mangling   .race-name::before { background: var(--c-mangling);   color: var(--c-mangling); }
.race-row.bruteforce .race-name::before { background: var(--c-bruteforce); color: var(--c-bruteforce); }
.race-row.markov     .race-name::before { background: var(--c-markov);     color: var(--c-markov); }
.race-row.llm        .race-name::before { background: var(--c-llm);        color: var(--c-llm); }

.race-bar {
  position: relative;
  height: 22px;
  background: var(--bg-input);
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}
.race-bar::before {
  /* faint scale ticks */
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(90deg, transparent 0 calc(10% - 1px), var(--line-soft) calc(10% - 1px) 10%);
  background-size: 10% 100%;
  pointer-events: none;
}
.race-fill {
  height: 100%;
  width: 0%;
  position: relative;
  background: var(--c-dictionary);
  transition: width 0.7s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.3s;
  box-shadow: 0 0 18px currentColor;
}
.race-fill::after {
  content: "";
  position: absolute; right: -1px; top: 0; bottom: 0;
  width: 2px;
  background: var(--text);
  box-shadow: 0 0 12px currentColor, 0 0 22px currentColor;
  animation: pulse 1.2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.4; }
}
.race-row.dictionary .race-fill { background: var(--c-dictionary); color: var(--c-dictionary); }
.race-row.mangling   .race-fill { background: var(--c-mangling);   color: var(--c-mangling); }
.race-row.bruteforce .race-fill { background: var(--c-bruteforce); color: var(--c-bruteforce); }
.race-row.markov     .race-fill { background: var(--c-markov);     color: var(--c-markov); }
.race-row.llm        .race-fill { background: var(--c-llm);        color: var(--c-llm); }

.race-fill.uncracked {
  background: repeating-linear-gradient(45deg,
    var(--line-dash) 0 6px,
    transparent 6px 12px);
  box-shadow: none;
}
.race-fill.uncracked::after { display: none; }

.race-status {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--text-3);
  text-align: right;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ================== Detail panels ================== */

.detail { margin-top: 22px; display: grid; gap: 8px; }
.detail details {
  background: var(--bg-input);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 13px;
  transition: border-color 0.15s;
}
.detail details:hover { border-color: var(--line-2); }
.detail details[open] { border-color: var(--acid); }
.detail summary {
  cursor: pointer;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text);
  outline: none;
  list-style: none;
  display: flex; align-items: center; gap: 10px;
}
.detail summary::-webkit-details-marker { display: none; }
.detail summary::before {
  content: "+"; font-size: 14px; color: var(--text-3);
  width: 14px; display: inline-block;
}
.detail details[open] summary::before { content: "−"; color: var(--acid); }
.detail strong {
  display: block;
  font-family: var(--mono);
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-3);
  margin: 12px 0 6px;
}
.detail pre {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-2);
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 280px;
  overflow: auto;
}
.detail pre::-webkit-scrollbar { width: 8px; height: 8px; }
.detail pre::-webkit-scrollbar-thumb { background: var(--line-2); border-radius: 4px; }

/* ================== Modal ================== */

.modal {
  position: fixed; inset: 0; z-index: 200;
  background: color-mix(in srgb, var(--bg) 75%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: grid; place-items: center;
  animation: modal-in 0.22s ease-out;
}
@keyframes modal-in { from { opacity: 0; } to { opacity: 1; } }
.modal.hidden { display: none; }
.modal-card {
  background: linear-gradient(180deg, var(--bg-2), var(--bg-3));
  border: 1px solid var(--line-2);
  border-radius: 16px;
  width: 520px; max-width: 92vw;
  box-shadow: var(--shadow-card-hover),
              0 0 0 1px var(--acid-soft);
  overflow: hidden;
  transform: translateY(0);
  animation: card-in 0.32s cubic-bezier(0.22, 1, 0.36, 1);
}
@keyframes card-in {
  from { transform: translateY(12px) scale(0.98); opacity: 0; }
  to   { transform: translateY(0) scale(1); opacity: 1; }
}
.modal-head {
  display: flex; justify-content: space-between; align-items: flex-start;
  padding: 22px 26px 16px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, var(--acid-soft), transparent);
}
.modal-eyebrow {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--acid);
  margin-bottom: 4px;
}
.modal-head h3 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.01em;
}
.modal-close {
  background: transparent; border: 0;
  font-size: 26px; line-height: 1;
  color: var(--text-3); cursor: pointer;
  padding: 0 6px;
  transition: color 0.15s, transform 0.15s;
}
.modal-close:hover { color: var(--signal-bad); transform: rotate(90deg); }
.modal-body { padding: 22px 26px 24px; }

.form-stack { display: grid; gap: 18px; }
.field-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 9px; font-weight: 700;
  letter-spacing: 0.16em;
  padding: 2px 6px;
  border: 1px solid var(--line-2);
  border-radius: 3px;
  color: var(--text-3);
  margin-right: 6px;
}

.modal-actions {
  display: flex; gap: 10px; justify-content: flex-end;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.cfg-status {
  margin-top: 14px;
  font-family: var(--mono);
  font-size: 12px;
  padding: 10px 14px;
  border-radius: 8px;
  display: none;
  border: 1px solid transparent;
}
.cfg-status.ok  { display: block;
                  background: color-mix(in srgb, var(--c-markov) 10%, transparent);
                  color: var(--c-markov);
                  border-color: color-mix(in srgb, var(--c-markov) 32%, transparent); }
.cfg-status.err { display: block;
                  background: color-mix(in srgb, var(--signal-bad) 10%, transparent);
                  color: var(--signal-bad);
                  border-color: color-mix(in srgb, var(--signal-bad) 36%, transparent); }

/* ================== Footer ================== */

.site-footer {
  position: relative; z-index: 1;
  max-width: 1180px;
  margin: 0 auto;
  padding: 24px 36px 48px;
  display: flex; align-items: center; gap: 24px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-3);
}
.foot-eyebrow { color: var(--acid); letter-spacing: 0.12em; }
.foot-meta { margin-left: auto; letter-spacing: 0.12em; }

/* ================== Per-mode flourishes ================== */

[data-active-mode="defender"] .eyebrow {
  border-color: color-mix(in srgb, var(--c-dictionary) 40%, transparent);
  background: color-mix(in srgb, var(--c-dictionary) 8%, transparent);
  color: var(--c-dictionary);
}
[data-active-mode="attacker"] .eyebrow {
  border-color: color-mix(in srgb, var(--c-llm) 40%, transparent);
  background: color-mix(in srgb, var(--c-llm) 8%, transparent);
  color: var(--c-llm);
}
[data-active-mode="demo"] .eyebrow {
  border-color: color-mix(in srgb, var(--acid) 40%, transparent);
  background: var(--acid-soft);
  color: var(--acid);
}

/* ================== Hero / page-load reveal ================== */

main > .card { opacity: 0; transform: translateY(8px);
                animation: fade-up 0.5s cubic-bezier(0.22, 1, 0.36, 1) forwards; }
main > .card:nth-child(1) { animation-delay: 0.05s; }
main > .card:nth-child(2) { animation-delay: 0.12s; }
main > .card:nth-child(3) { animation-delay: 0.19s; }
main > .card:nth-child(4) { animation-delay: 0.26s; }
@keyframes fade-up {
  to { opacity: 1; transform: translateY(0); }
}

/* ================== Responsive trim ================== */

@media (max-width: 760px) {
  .topbar { padding: 14px 18px 0; gap: 6px 14px; }
  .modes { flex-wrap: wrap; gap: 2px; }
  .mode-link, .settings-link { padding: 8px 10px; font-size: 11px; }
  .mode-num { display: none; }
  main { margin: 28px auto 60px; padding: 0 18px; gap: 16px; }
  .card { padding: 22px 20px; }
  .card h2 { font-size: 20px; }
  .row { grid-template-columns: 1fr; }
  .race-row { grid-template-columns: 110px 1fr 90px; gap: 8px; }
  .race-name { font-size: 11px; }
  .modal-card { width: calc(100vw - 24px); }
}

/* ================== Attacker mode candidate chips ================== */

.cand-grid { display: flex; flex-wrap: wrap; gap: 6px; }
.cand {
  font-family: var(--mono);
  font-size: 12.5px;
  padding: 5px 10px;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--bg-input);
  color: var(--text-2);
  display: inline-flex; align-items: center; gap: 6px;
  transition: transform 0.18s, border-color 0.18s;
}
.cand:hover { transform: translateY(-1px); }
.cand.only-llm {
  background: color-mix(in srgb, var(--c-llm) 10%, var(--bg-input));
  border-color: color-mix(in srgb, var(--c-llm) 36%, transparent);
  color: var(--c-llm);
}
.cand.only-llm .cand-mark { color: var(--c-llm); }
.cand.shared {
  background: color-mix(in srgb, var(--c-dictionary) 8%, var(--bg-input));
  border-color: color-mix(in srgb, var(--c-dictionary) 28%, transparent);
  color: var(--c-dictionary);
}
.cand.shared .cand-mark { color: var(--c-dictionary); }
.cand-num { color: var(--text-3); margin-right: 2px; }

.cand-legend {
  display: flex; gap: 16px; flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-3);
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line-2);
}
.cand-legend strong { color: var(--text-2); }

/* ================== Ranking strip ================== */

.ranking {
  display: flex; align-items: center; flex-wrap: wrap; gap: 10px;
  margin-top: 4px;
}
.ranking-label {
  font-family: var(--mono);
  font-size: 11px; letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
}
.ranking-pill {
  font-family: var(--mono);
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--line-2);
  background: var(--bg-input);
  color: var(--text-2);
  display: inline-flex; align-items: center; gap: 8px;
}
.ranking-pill .rk-num {
  font-weight: 700; color: var(--acid);
  font-size: 10px; letter-spacing: 0.08em;
}
.ranking-pill[data-method="dictionary"] { border-color: color-mix(in srgb, var(--c-dictionary) 45%, transparent); color: var(--c-dictionary); }
.ranking-pill[data-method="mangling"]   { border-color: color-mix(in srgb, var(--c-mangling) 45%, transparent);   color: var(--c-mangling); }
.ranking-pill[data-method="bruteforce"] { border-color: color-mix(in srgb, var(--c-bruteforce) 45%, transparent); color: var(--c-bruteforce); }
.ranking-pill[data-method="markov"]     { border-color: color-mix(in srgb, var(--c-markov) 45%, transparent);     color: var(--c-markov); }
.ranking-pill[data-method="llm"]        { border-color: color-mix(in srgb, var(--c-llm) 45%, transparent);        color: var(--c-llm); }

/* ================== Step number adornment ================== */
.step-num {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--acid);
  margin-right: 10px;
}

/* ================== AI motif: token-stream caption ================== */

.ai-stream {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px 6px 12px;
  border: 1px solid color-mix(in srgb, var(--c-llm) 32%, transparent);
  border-radius: 999px;
  background: color-mix(in srgb, var(--c-llm) 10%, var(--bg-input));
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--c-llm);
  text-transform: uppercase;
}
.ai-stream::before {
  content: "";
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--c-llm);
  box-shadow: 0 0 0 0 currentColor;
  animation: ai-ping 1.6s ease-out infinite;
}
@keyframes ai-ping {
  0%   { box-shadow: 0 0 0 0   color-mix(in srgb, var(--c-llm) 65%, transparent); }
  70%  { box-shadow: 0 0 0 8px color-mix(in srgb, var(--c-llm) 0%,  transparent); }
  100% { box-shadow: 0 0 0 0   color-mix(in srgb, var(--c-llm) 0%,  transparent); }
}
.ai-stream .stream-tokens {
  display: inline-flex; gap: 4px;
}
.ai-stream .stream-tokens span {
  width: 16px; height: 4px; border-radius: 2px;
  background: color-mix(in srgb, var(--c-llm) 35%, transparent);
  animation: token-flow 1.6s ease-in-out infinite;
}
.ai-stream .stream-tokens span:nth-child(2) { animation-delay: 0.2s; }
.ai-stream .stream-tokens span:nth-child(3) { animation-delay: 0.4s; }
.ai-stream .stream-tokens span:nth-child(4) { animation-delay: 0.6s; }
@keyframes token-flow {
  0%, 100% { background: color-mix(in srgb, var(--c-llm) 25%, transparent); }
  50%      { background: var(--c-llm); }
}

/* Light theme tweaks */
[data-theme="light"] .bg-scan { display: none; }  /* paper has no scanlines */
[data-theme="light"] .bg-grid { opacity: 0.7; }

/* CRT-only on dark */
[data-theme="dark"] body {
  text-shadow: 0 0 0 transparent; /* placeholder, in case future glow needed */
}

/* Race fill end-cap color in light mode (dark dot looks better than text-color) */
[data-theme="light"] .race-fill::after {
  background: var(--text);
  box-shadow: 0 0 8px color-mix(in srgb, currentColor 60%, transparent);
}