:root {
  --splunk-green: #65a637;
  --splunk-dark: #1a1c20;
  --splunk-pink: #f8a800;
  --bg: #f4f6f8;
  --card: #ffffff;
  --border: #d9dee3;
  --text: #24292f;
  --muted: #6b7681;
  --correct: #2e9e4f;
  --correct-bg: #e7f6ec;
  --wrong: #d64550;
  --wrong-bg: #fbe9ea;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

.app-header {
  background: linear-gradient(120deg, var(--splunk-dark), #2b2f36);
  color: #fff;
  padding: 20px 16px;
  box-shadow: var(--shadow);
}
.header-inner {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.app-header h1 { font-size: 1.35rem; margin: 0; font-weight: 700; }
.app-header small { font-size: 0.85rem; color: var(--splunk-green); font-weight: 600; }
.progress-summary { font-size: 0.85rem; color: #cfd6dd; }

.container { max-width: 860px; margin: 24px auto; padding: 0 16px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}

h2 { margin-top: 0; }
.lead { color: var(--muted); }

.field { margin-bottom: 18px; }
.field label { display: block; font-weight: 600; margin-bottom: 6px; }
.checkbox-field label { font-weight: 400; }
select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  background: #fff;
}
.checkbox-field input { margin-right: 8px; }

.btn {
  padding: 10px 20px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.15s;
}
.btn:hover { background: #f0f2f4; }
.btn-primary { background: var(--splunk-green); color: #fff; border-color: var(--splunk-green); }
.btn-primary:hover { background: #57922f; }
.btn-accent { background: var(--splunk-pink); color: #1a1c20; border-color: var(--splunk-pink); font-weight: 600; }
.btn-accent:hover { background: #e29a00; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.hidden { display: none !important; }

/* Quiz */
.quiz-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 10px;
  gap: 8px;
  flex-wrap: wrap;
}
.q-domain-tag {
  background: #eef4e8;
  color: #4a7a28;
  padding: 2px 10px;
  border-radius: 20px;
  font-weight: 600;
}
.q-score { font-weight: 600; color: var(--text); }

.progress-bar {
  height: 6px;
  background: #eceff2;
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 20px;
}
.progress-fill { height: 100%; background: var(--splunk-green); width: 0%; transition: width 0.3s; }

.q-text { font-size: 1.15rem; line-height: 1.6; margin-bottom: 20px; }
.q-text code, .feedback code, .review-q code {
  background: #2b2f36;
  color: #9fe870;
  padding: 1px 6px;
  border-radius: 4px;
  font-family: "Consolas", "Courier New", monospace;
  font-size: 0.9em;
}

.choices { display: flex; flex-direction: column; gap: 12px; }
.choice {
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  transition: all 0.12s;
  background: #fff;
}
.choice:hover { border-color: var(--splunk-green); background: #fafcf8; }
.choice.selected { border-color: var(--splunk-green); background: #f1f7ec; }
.choice.correct { border-color: var(--correct); background: var(--correct-bg); }
.choice.wrong { border-color: var(--wrong); background: var(--wrong-bg); }
.choice.disabled { cursor: default; pointer-events: none; }
.choice-letter {
  font-weight: 700;
  color: var(--splunk-green);
  min-width: 20px;
}
.choice.correct .choice-letter { color: var(--correct); }
.choice.wrong .choice-letter { color: var(--wrong); }

.feedback {
  margin-top: 20px;
  padding: 16px 18px;
  border-radius: 8px;
  border-left: 4px solid var(--splunk-green);
  background: #f6f9f3;
}
.feedback.is-correct { border-left-color: var(--correct); background: var(--correct-bg); }
.feedback.is-wrong { border-left-color: var(--wrong); background: var(--wrong-bg); }
.feedback .verdict { font-weight: 700; margin-bottom: 6px; }
.feedback.is-correct .verdict { color: var(--correct); }
.feedback.is-wrong .verdict { color: var(--wrong); }
.feedback .explanation { color: #333; }

.quiz-nav {
  display: flex;
  gap: 10px;
  margin-top: 24px;
  flex-wrap: wrap;
}

/* Results */
.result-summary { font-size: 1.1rem; margin-bottom: 20px; }
.result-score { font-size: 2.4rem; font-weight: 800; color: var(--splunk-green); }
.result-by-domain { margin-bottom: 24px; }
.domain-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}
.domain-row .bar-wrap { flex: 1; margin: 0 12px; height: 8px; background: #eceff2; border-radius: 4px; align-self: center; overflow: hidden; }
.domain-row .bar { height: 100%; background: var(--splunk-green); }

.review-list { display: flex; flex-direction: column; gap: 14px; }
.review-item {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  background: #fff;
}
.review-q { font-weight: 600; margin-bottom: 8px; }
.review-a { font-size: 0.92rem; margin: 3px 0; }
.review-a.correct-a { color: var(--correct); }
.review-a.your-a { color: var(--wrong); }
.review-exp { font-size: 0.9rem; color: #444; margin-top: 8px; padding-top: 8px; border-top: 1px dashed var(--border); }

.domain-stats { margin-top: 24px; font-size: 0.85rem; color: var(--muted); }
.domain-stats .ds-row { display: flex; justify-content: space-between; padding: 3px 0; }

.app-footer { text-align: center; color: var(--muted); font-size: 0.8rem; padding: 20px; }

@media (max-width: 600px) {
  .card { padding: 20px 16px; }
  .app-header h1 { font-size: 1.1rem; }
}