/* 簿記3級学習サイト — Neural Blue デザイン */

:root {
  --bg: #050a1a;
  --bg-2: #0a1540;
  --panel: #101a3e;
  --panel-2: #17234a;
  --line: #2a3468;
  --line-2: #3a4880;
  --text: #e6e9f5;
  --muted: #9aa3c9;
  --accent: #6ee7ff;
  --accent-2: #b388ff;
  --accent-3: #4d5fff;
  --good: #7cf2b0;
  --warn: #ffd166;
  --bad: #ff7597;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", sans-serif;
  background:
    radial-gradient(1200px 800px at 10% 0%, rgba(77,95,255,0.15) 0%, transparent 55%),
    radial-gradient(900px 700px at 100% 100%, rgba(179,136,255,0.12) 0%, transparent 55%),
    var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(110,231,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(110,231,255,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

body > * { position: relative; z-index: 1; }

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

/* Header / Nav */
.site-header {
  padding: 16px 28px;
  border-bottom: 1px solid var(--line);
  background: rgba(5,10,26,0.85);
  backdrop-filter: blur(10px);
  display: flex; justify-content: space-between; align-items: center;
  position: sticky; top: 0; z-index: 100;
}
.site-header .logo {
  font-size: 18px; font-weight: 700;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  letter-spacing: 0.03em;
}
.site-header .logo::before {
  content: "◆"; color: var(--accent); margin-right: 8px;
  -webkit-text-fill-color: var(--accent);
}
.site-nav { display: flex; gap: 4px; flex-wrap: wrap; }
.site-nav a {
  color: var(--muted); padding: 8px 14px; border-radius: 8px;
  font-size: 14px; transition: all .2s;
  border: 1px solid transparent;
}
.site-nav a:hover { color: var(--text); background: rgba(110,231,255,0.06); text-decoration: none; }
.site-nav a.active {
  color: var(--accent); background: rgba(110,231,255,0.1);
  border-color: rgba(110,231,255,0.3);
}

/* Main */
main { max-width: 1200px; margin: 0 auto; padding: 32px 24px 80px; }
h1 { font-size: 28px; margin: 0 0 8px; }
h2 { font-size: 22px; margin: 24px 0 12px;
     background: linear-gradient(90deg, var(--accent), var(--accent-2));
     -webkit-background-clip: text; background-clip: text; color: transparent;
     display: inline-block; }
h3 { font-size: 17px; margin: 20px 0 10px; color: var(--accent); }
p { margin: 8px 0; }
.muted { color: var(--muted); font-size: 13px; }

/* Hero */
.hero {
  text-align: center;
  padding: 56px 28px;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(77,95,255,0.15), rgba(179,136,255,0.1));
  border: 1px solid var(--line);
  margin-bottom: 28px;
  position: relative; overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(circle at 30% 50%, rgba(110,231,255,0.2), transparent 50%),
              radial-gradient(circle at 70% 50%, rgba(179,136,255,0.15), transparent 50%);
}
.hero > * { position: relative; z-index: 2; }
.hero h1 {
  font-size: 38px;
  background: linear-gradient(90deg, #fff, var(--accent) 40%, var(--accent-2) 80%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  letter-spacing: 0.02em;
}
.hero p { color: var(--muted); font-size: 16px; margin: 14px 0 22px; }

/* Cards */
.card {
  background: linear-gradient(135deg, var(--panel), var(--panel-2));
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px;
  transition: all .25s ease;
  position: relative; overflow: hidden;
}
.card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 10px 30px rgba(110,231,255,0.15);
}
.card h3 { margin-top: 0; }

.grid { display: grid; gap: 18px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 860px) {
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; }
  .hero h1 { font-size: 28px; }
  .site-header { padding: 12px 16px; flex-direction: column; gap: 10px; }
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 11px 22px;
  border-radius: 10px;
  background: linear-gradient(90deg, var(--accent), var(--accent-3));
  color: #041024; font-weight: 700; font-size: 14px;
  border: none; cursor: pointer;
  transition: all .2s;
  box-shadow: 0 4px 20px rgba(110,231,255,0.25);
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(110,231,255,0.5);
  text-decoration: none;
}
.btn.ghost {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  box-shadow: none;
}
.btn.ghost:hover { background: rgba(110,231,255,0.1); }
.btn.purple {
  background: linear-gradient(90deg, var(--accent-2), #7e5cff);
  box-shadow: 0 4px 20px rgba(179,136,255,0.3);
  color: #fff;
}
.btn.small { padding: 7px 14px; font-size: 13px; }

/* Pill / Badge */
.pill {
  display: inline-block;
  padding: 3px 11px;
  border-radius: 999px;
  font-size: 12px;
  background: rgba(110,231,255,0.12);
  color: var(--accent);
  border: 1px solid rgba(110,231,255,0.3);
  margin-right: 6px;
}
.pill.purple { background: rgba(179,136,255,0.14); color: var(--accent-2); border-color: rgba(179,136,255,0.3); }
.pill.good { background: rgba(124,242,176,0.12); color: var(--good); border-color: rgba(124,242,176,0.3); }
.pill.warn { background: rgba(255,209,102,0.12); color: var(--warn); border-color: rgba(255,209,102,0.3); }
.pill.dim { background: rgba(154,163,201,0.1); color: var(--muted); border-color: var(--line); }

/* Chapter card */
.chapter-card {
  background: linear-gradient(135deg, var(--panel), var(--panel-2));
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px;
  cursor: pointer;
  transition: all .25s;
  position: relative;
  text-decoration: none; color: inherit;
  display: block;
}
.chapter-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 8px 28px rgba(110,231,255,0.2);
  text-decoration: none;
}
.chapter-card .step {
  font-family: "Consolas", monospace;
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.1em;
}
.chapter-card .ctitle {
  font-size: 17px; font-weight: 700; margin: 8px 0 6px;
}
.chapter-card .cdesc { color: var(--muted); font-size: 13px; }
.chapter-card .cmeta {
  margin-top: 12px; padding-top: 10px; border-top: 1px dashed var(--line);
  display: flex; justify-content: space-between; font-size: 12px;
}
.chapter-card .cmeta span { color: var(--muted); }
.chapter-card.locked { opacity: 0.55; }
.chapter-card.completed { border-color: var(--good); }
.chapter-card.completed .step::before { content: "✓ "; color: var(--good); }
.chapter-card.current { border-color: var(--warn); box-shadow: 0 0 0 1px var(--warn), 0 0 20px rgba(255,209,102,0.25); }

/* Progress bar */
.progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(255,255,255,0.06);
  border-radius: 4px;
  overflow: hidden;
}
.progress-bar > div {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 12px rgba(110,231,255,0.6);
  transition: width .4s ease;
}

/* Stats */
.stat {
  background: linear-gradient(135deg, var(--panel), var(--panel-2));
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 20px;
}
.stat .label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; }
.stat .value { font-size: 28px; font-weight: 700; margin-top: 4px; color: var(--accent); }
.stat .value.purple { color: var(--accent-2); }
.stat .value.good { color: var(--good); }
.stat .value.warn { color: var(--warn); }

/* Lesson sections */
.lesson-section {
  background: linear-gradient(135deg, rgba(110,231,255,0.06), rgba(77,95,255,0.04));
  border: 1px solid rgba(110,231,255,0.25);
  border-radius: 12px;
  padding: 20px 22px;
  margin-bottom: 14px;
}
.lesson-section h4 {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 16px;
}
.lesson-section h4 .num {
  font-family: "Consolas", monospace;
  font-size: 13px;
  padding: 2px 8px;
  background: rgba(110,231,255,0.15);
  border-radius: 5px;
  margin-right: 8px;
}

/* Lesson extra info boxes (why/business/mistake/tip) */
.lesson-extra {
  margin-top: 12px;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13.5px;
  line-height: 1.65;
  border-left: 3px solid;
}
.lesson-extra strong { display: inline-block; margin-bottom: 4px; font-size: 12.5px; }
.lesson-extra.why { background: rgba(110,231,255,0.05); border-color: var(--accent); color: #d8efff; }
.lesson-extra.why strong { color: var(--accent); }
.lesson-extra.business { background: rgba(179,136,255,0.05); border-color: var(--accent-2); color: #ead8ff; }
.lesson-extra.business strong { color: var(--accent-2); }
.lesson-extra.mistake { background: rgba(255,117,151,0.06); border-color: var(--bad); color: #ffd8e2; }
.lesson-extra.mistake strong { color: var(--bad); }
.lesson-extra.tip { background: rgba(255,209,102,0.06); border-color: var(--warn); color: #ffeec5; }
.lesson-extra.tip strong { color: var(--warn); }

.example {
  background: linear-gradient(135deg, rgba(179,136,255,0.08), rgba(179,136,255,0.04));
  border: 1px solid rgba(179,136,255,0.3);
  border-radius: 12px;
  padding: 18px 22px;
  margin-bottom: 12px;
}
.example .tag {
  display: inline-block;
  padding: 3px 10px;
  background: rgba(179,136,255,0.2);
  color: var(--accent-2);
  border-radius: 5px;
  font-size: 12px;
  margin-bottom: 8px;
}
.example .a {
  margin-top: 10px;
  padding: 8px 12px;
  background: rgba(0,0,0,0.25);
  border-left: 2px solid var(--accent-2);
  border-radius: 4px;
  font-family: "Consolas", monospace;
  font-size: 13px;
}
.example .exp { color: var(--muted); font-size: 13px; margin-top: 8px; }

/* Problem */
.problem {
  background: linear-gradient(135deg, rgba(124,242,176,0.06), rgba(124,242,176,0.02));
  border: 1px solid rgba(124,242,176,0.25);
  border-radius: 12px;
  padding: 20px 22px;
  margin-bottom: 14px;
}
.problem .q-tag {
  display: inline-block;
  padding: 3px 10px;
  background: rgba(124,242,176,0.2);
  color: var(--good);
  border-radius: 5px;
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 10px;
}
.problem .q-text { font-size: 15px; line-height: 1.8; }

.journal-inputs {
  display: grid;
  grid-template-columns: 80px 1fr 1fr;
  gap: 8px;
  margin: 14px 0 10px;
  align-items: center;
}
.journal-inputs .side {
  font-weight: 700;
  text-align: center;
  padding: 8px;
  background: rgba(255,255,255,0.03);
  border-radius: 6px;
  font-size: 13px;
}
.journal-inputs .side.debit { color: var(--accent); }
.journal-inputs .side.credit { color: var(--accent-2); }
.journal-inputs select, .journal-inputs input {
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--line);
  color: var(--text);
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
}
.journal-inputs select:focus, .journal-inputs input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(110,231,255,0.2);
}

.choice-list {
  display: flex; flex-direction: column;
  gap: 8px;
  margin: 14px 0 10px;
}
.choice-list label {
  display: flex; align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: rgba(0,0,0,0.25);
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
  transition: all .15s;
}
.choice-list label:hover {
  border-color: var(--accent);
  background: rgba(110,231,255,0.06);
}
.choice-list input[type="radio"] { accent-color: var(--accent); }

.problem .actions { margin-top: 12px; display: flex; gap: 8px; flex-wrap: wrap; }

.feedback {
  margin-top: 12px;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  display: none;
}
.feedback.show { display: block; animation: fadeIn .3s; }
.feedback.correct {
  background: rgba(124,242,176,0.1);
  border: 1px solid var(--good);
  color: var(--good);
  box-shadow: 0 0 20px rgba(124,242,176,0.2);
}
.feedback.wrong {
  background: rgba(255,117,151,0.1);
  border: 1px solid var(--bad);
  color: var(--bad);
}
.feedback .exp-text { margin-top: 6px; color: var(--text); font-size: 13px; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Gantt chart */
.gantt {
  overflow-x: auto;
  background: linear-gradient(135deg, var(--panel), var(--panel-2));
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
}
.gantt-grid {
  display: grid;
  grid-template-columns: 180px repeat(42, 22px);
  gap: 2px;
  min-width: 1100px;
}
.gantt-header {
  font-size: 11px; color: var(--muted); text-align: center;
  padding: 4px 0;
  border-bottom: 1px solid var(--line);
}
.gantt-label {
  font-size: 13px; color: var(--text);
  padding: 4px 10px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.gantt-cell {
  height: 22px;
  border-radius: 3px;
  background: rgba(255,255,255,0.025);
  border: 1px solid rgba(255,255,255,0.03);
}
.gantt-cell.plan { background: rgba(110,231,255,0.22); border-color: rgba(110,231,255,0.4); }
.gantt-cell.done {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 10px rgba(110,231,255,0.5);
  border: none;
}
.gantt-cell.current {
  background: rgba(255,209,102,0.7);
  animation: gpulse 1.8s infinite;
  border: none;
}
@keyframes gpulse {
  0%,100% { box-shadow: 0 0 0 0 rgba(255,209,102,0.6); }
  50% { box-shadow: 0 0 14px 2px rgba(255,209,102,0.9); }
}

/* Mock exam timer */
.timer {
  display: inline-block;
  padding: 10px 18px;
  background: linear-gradient(135deg, #1a0e2e, #2e0e42);
  border: 1px solid var(--accent-2);
  border-radius: 10px;
  font-family: "Consolas", monospace;
  font-size: 20px;
  color: var(--accent);
  box-shadow: 0 0 20px rgba(179,136,255,0.2);
}
.timer.warning { color: var(--warn); border-color: var(--warn); }
.timer.danger { color: var(--bad); border-color: var(--bad); animation: shake 0.5s infinite; }
@keyframes shake {
  0%,100% { transform: translateX(0); }
  25% { transform: translateX(-2px); }
  75% { transform: translateX(2px); }
}

/* Footer */
footer {
  text-align: center;
  padding: 30px;
  color: var(--muted);
  font-size: 12px;
  border-top: 1px solid var(--line);
  margin-top: 40px;
}

/* Misc */
.spacer { height: 20px; }
hr.divider {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
  margin: 30px 0;
}

/* ============================================================
   CBT試験スタイル
   ============================================================ */
.cbt-toolbar {
  position: sticky; top: 70px; z-index: 80;
  background: rgba(5,10,26,0.95);
  backdrop-filter: blur(10px);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 16px;
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 16px; flex-wrap: wrap; gap: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}
.cbt-exam-name { font-weight: 700; font-size: 15px; color: var(--accent); }
.cbt-toolbar-right { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.cbt-status { color: var(--muted); font-size: 13px; font-family: Consolas, monospace; }

.cbt-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 16px;
}
@media (max-width: 900px) { .cbt-layout { grid-template-columns: 1fr; } }

.cbt-sidebar {
  position: sticky;
  top: 140px;
  align-self: start;
  background: linear-gradient(135deg, var(--panel), var(--panel-2));
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
  max-height: calc(100vh - 160px);
  max-height: calc(100dvh - 160px); /* iOS Safari対応：動的ビューポート */
  overflow-y: auto;
}
.cbt-sidebar-title {
  font-weight: 700; font-size: 13px; color: var(--accent);
  letter-spacing: 0.08em; margin-bottom: 10px; text-transform: uppercase;
}
.cbt-sidebar-section {
  margin: 14px 0 6px;
  font-size: 12px; color: var(--muted);
  border-top: 1px dashed var(--line); padding-top: 8px;
}
.cbt-sidebar-section:first-of-type { border-top: none; margin-top: 0; padding-top: 0; }
.cbt-sidebar-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 4px; }
.cbt-q-btn {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--line);
  color: var(--muted);
  border-radius: 6px;
  padding: 6px 0;
  font-size: 12px; font-weight: 700;
  cursor: pointer; transition: all .15s;
  font-family: Consolas, monospace;
  min-width: 30px;
}
.cbt-q-btn:hover { color: var(--text); border-color: var(--accent); }
.cbt-q-btn.answered { background: rgba(124,242,176,0.15); color: var(--good); border-color: var(--good); }
.cbt-q-btn.flagged { background: rgba(255,209,102,0.18); color: var(--warn); border-color: var(--warn); }
.cbt-q-btn.focus { box-shadow: 0 0 0 2px var(--accent); }
.cbt-q-btn.mini { padding: 2px 6px; min-width: 0; font-size: 10px; cursor: default; }
.cbt-sidebar-legend {
  margin-top: 14px; padding-top: 10px; border-top: 1px dashed var(--line);
  font-size: 11px; color: var(--muted);
  display: flex; flex-direction: column; gap: 6px;
}
.cbt-sidebar-legend > div { display: flex; align-items: center; gap: 6px; }

.cbt-section-title {
  font-size: 18px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  margin-top: 18px;
  padding-bottom: 6px;
  border-bottom: 1px dashed var(--line);
}
.cbt-section-title:first-of-type { margin-top: 0; }

.cbt-problem { scroll-margin-top: 150px; }
.cbt-problem.highlight {
  animation: highlightFlash 1s;
}
@keyframes highlightFlash {
  0%, 100% { box-shadow: none; }
  50% { box-shadow: 0 0 0 3px var(--accent), 0 0 30px rgba(110,231,255,0.5); }
}
.cbt-prob-head {
  display: flex; justify-content: space-between; align-items: center;
  gap: 8px; flex-wrap: wrap; margin-bottom: 10px;
}
.cbt-prob-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.cbt-flag-btn, .cbt-ask-btn {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--muted);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 11.5px;
  cursor: pointer;
  transition: all .15s;
}
.cbt-flag-btn:hover, .cbt-ask-btn:hover { color: var(--text); border-color: var(--accent); }
.cbt-flag-btn.active { background: rgba(255,209,102,0.15); color: var(--warn); border-color: var(--warn); }
.cbt-ask-btn:hover { background: rgba(179,136,255,0.1); border-color: var(--accent-2); color: var(--accent-2); }

/* Modal */
.modal-bg {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 200;
  display: flex; align-items: center; justify-content: center;
  backdrop-filter: blur(4px);
}
.modal-box {
  background: linear-gradient(135deg, var(--panel), var(--panel-2));
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 24px;
  max-width: 480px; width: 90%;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
}
.modal-box h3 { margin: 0 0 10px; color: var(--accent); }
.modal-box .muted { white-space: pre-wrap; }

/* ============================================================
   チャットボット
   ============================================================ */
#chatbot-fab {
  position: fixed; bottom: 24px; right: 24px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #041024;
  border: none; border-radius: 999px;
  padding: 14px 22px;
  font-weight: 700; font-size: 14px;
  cursor: pointer;
  box-shadow: 0 6px 24px rgba(110,231,255,0.4);
  display: flex; align-items: center; gap: 10px;
  z-index: 150;
  transition: all .2s;
}
#chatbot-fab:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(110,231,255,0.6); }
#chatbot-fab .fab-icon { font-size: 18px; }
@media (max-width: 600px) {
  #chatbot-fab .fab-label { display: none; }
  #chatbot-fab { padding: 14px; }
}

.chatbot-panel {
  position: fixed; bottom: 0; right: 0;
  width: 400px; max-width: 100vw;
  height: 70vh; height: 70dvh; max-height: 600px;
  background: linear-gradient(180deg, var(--panel), var(--bg-2));
  border-left: 1px solid var(--line);
  border-top: 1px solid var(--line);
  border-radius: 16px 0 0 0;
  display: flex; flex-direction: column;
  transform: translateY(110%);
  transition: transform .3s ease;
  z-index: 180;
  box-shadow: -10px -10px 40px rgba(0,0,0,0.5);
}
.chatbot-panel.open { transform: translateY(0); }
@media (max-width: 600px) {
  .chatbot-panel { width: 100vw; height: 85vh; max-height: none; border-radius: 16px 16px 0 0; border-left: none; }
}

.chatbot-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  background: rgba(110,231,255,0.05);
  border-radius: 16px 0 0 0;
}
.chatbot-title {
  font-weight: 700; font-size: 15px; color: var(--accent);
}
.chatbot-sub { font-size: 11px; color: var(--muted); margin-top: 2px; }
.chatbot-icon-btn {
  background: transparent; border: none; color: var(--muted);
  cursor: pointer; padding: 4px 8px; font-size: 14px;
  border-radius: 6px; transition: all .15s;
}
.chatbot-icon-btn:hover { color: var(--text); background: rgba(255,255,255,0.05); }

.chatbot-messages {
  flex: 1;
  overflow-y: auto;
  padding: 14px;
  display: flex; flex-direction: column; gap: 12px;
}

.chat-welcome {
  text-align: center;
  padding: 20px 14px;
  background: rgba(110,231,255,0.05);
  border-radius: 12px;
  border: 1px dashed var(--line);
}

.chat-msg { display: flex; }
.chat-msg.user { justify-content: flex-end; }
.chat-msg.assistant { justify-content: flex-start; }
.chat-msg.system { justify-content: center; }
.chat-bubble {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 13.5px;
  line-height: 1.6;
  word-wrap: break-word;
}
.chat-msg.user .chat-bubble {
  background: linear-gradient(135deg, var(--accent-3), var(--accent-2));
  color: #fff;
  border-bottom-right-radius: 4px;
}
.chat-msg.assistant .chat-bubble {
  background: rgba(255,255,255,0.06);
  color: var(--text);
  border: 1px solid var(--line);
  border-bottom-left-radius: 4px;
}
.chat-msg.system .chat-bubble {
  background: rgba(255,209,102,0.08);
  color: var(--warn);
  border: 1px solid rgba(255,209,102,0.3);
  font-size: 12.5px;
  text-align: center;
  white-space: pre-wrap;
}
.chat-bubble strong { color: var(--accent); }
.chat-bubble code {
  background: rgba(0,0,0,0.3); padding: 2px 5px;
  border-radius: 4px; font-size: 12px;
  font-family: Consolas, monospace; color: var(--accent);
}
.chat-bubble pre {
  background: rgba(0,0,0,0.3);
  padding: 10px 12px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 8px 0;
  font-size: 12px;
  font-family: Consolas, monospace;
}
.chat-bubble pre code { background: none; padding: 0; }
.chat-bubble ul { margin: 6px 0; padding-left: 20px; }
.chat-bubble h3, .chat-bubble h4 {
  margin: 8px 0 4px;
  color: var(--accent);
  font-size: 14px;
}

.chat-bubble.typing { padding: 10px 18px; }
.chat-bubble.typing span {
  display: inline-block;
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  margin: 0 2px;
  animation: typingDot 1.2s infinite;
}
.chat-bubble.typing span:nth-child(2) { animation-delay: 0.2s; }
.chat-bubble.typing span:nth-child(3) { animation-delay: 0.4s; }
@keyframes typingDot {
  0%,60%,100% { opacity: 0.3; transform: translateY(0); }
  30% { opacity: 1; transform: translateY(-3px); }
}

.chatbot-input-area {
  padding: 10px 12px;
  border-top: 1px solid var(--line);
  display: flex; gap: 8px; align-items: flex-end;
}
.chatbot-input-area textarea {
  flex: 1;
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 12px;
  font-family: inherit;
  font-size: 13.5px;
  resize: none;
  max-height: 100px;
}
.chatbot-input-area textarea:focus {
  outline: none; border-color: var(--accent);
}
.chatbot-footer-note {
  padding: 6px 14px;
  font-size: 10.5px; color: var(--muted);
  border-top: 1px solid var(--line);
  background: rgba(0,0,0,0.2);
  text-align: center;
}

/* AI badge */
.ai-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px;
  background: linear-gradient(90deg, rgba(110,231,255,0.15), rgba(179,136,255,0.15));
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.05em;
}
.ai-badge::before {
  content: "◆";
  animation: rotate 3s linear infinite;
  display: inline-block;
}
@keyframes rotate { to { transform: rotate(360deg); } }