:root {
  --pink: #ffd6e8;
  --pink-strong: #ff9ec7;
  --lavender: #e2d9ff;
  --lavender-strong: #b7a3ff;
  --mint: #cdf5e6;
  --mint-strong: #7fe0bd;
  --yellow: #fff6c9;
  --yellow-strong: #ffe58a;
  --sky: #d6ecff;
  --sky-strong: #9ecbff;
  --ink: #4a4560;
  --ink-soft: #837c9c;
  --card-bg: #ffffff;
  --danger: #ff8fa3;
  --danger-bg: #ffe3e9;
  --success: #6fcf97;
  --success-bg: #e3f9ee;
  --radius-lg: 24px;
  --radius-md: 16px;
  --shadow: 0 10px 30px rgba(150, 130, 200, 0.15);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
}

body {
  font-family: "Gowun Dodum", "Pretendard", "Noto Sans KR", sans-serif;
  color: var(--ink);
  background: linear-gradient(135deg, #fff0f6 0%, #eef1ff 45%, #eafaf4 100%);
  background-attachment: fixed;
  display: flex;
  justify-content: center;
  padding: 32px 16px 64px;
}

.app-shell {
  width: 100%;
  max-width: 720px;
}

.screen {
  display: none;
  animation: fadeIn 0.35s ease;
}

.screen.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 32px;
}

.header {
  text-align: center;
  margin-bottom: 24px;
}

.header .badge {
  display: inline-block;
  background: var(--lavender);
  color: var(--ink);
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 12px;
}

.header h1 {
  font-size: 26px;
  margin: 0 0 8px;
}

.header p {
  color: var(--ink-soft);
  margin: 0;
  line-height: 1.6;
}

.field-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 14px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field.full {
  grid-column: 1 / -1;
}

.field label {
  font-size: 13px;
  font-weight: 700;
  color: var(--ink-soft);
}

.field input {
  border: 2px solid #eee6ff;
  border-radius: var(--radius-md);
  padding: 12px 14px;
  font-size: 15px;
  font-family: inherit;
  background: #fbfaff;
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s, background 0.2s;
}

.field input:focus {
  border-color: var(--lavender-strong);
  background: #fff;
}

.btn {
  border: none;
  border-radius: 999px;
  padding: 14px 28px;
  font-size: 16px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, opacity 0.15s;
}

.btn:active {
  transform: scale(0.97);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-primary {
  background: linear-gradient(135deg, var(--lavender-strong), var(--pink-strong));
  color: #fff;
  box-shadow: 0 8px 20px rgba(183, 163, 255, 0.45);
  width: 100%;
}

.btn-secondary {
  background: var(--sky);
  color: var(--ink);
}

.btn-download {
  background: linear-gradient(135deg, var(--mint-strong), var(--sky-strong));
  color: #fff;
  box-shadow: 0 8px 20px rgba(127, 224, 189, 0.45);
}

.error-text {
  color: var(--danger);
  font-size: 13px;
  font-weight: 700;
  min-height: 18px;
  margin-top: 4px;
}

/* Quiz screen */
.progress-wrap {
  margin-bottom: 20px;
}

.progress-meta {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  font-weight: 700;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.progress-bar-bg {
  background: #f0ecff;
  border-radius: 999px;
  height: 12px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--pink-strong), var(--lavender-strong), var(--mint-strong));
  transition: width 0.4s ease;
}

.category-pill {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  background: var(--yellow);
  margin-bottom: 14px;
}

.question-text {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.6;
  margin-bottom: 20px;
}

.options {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 8px;
}

.option-btn {
  text-align: left;
  border: 2px solid #eee6ff;
  background: #fbfaff;
  border-radius: var(--radius-md);
  padding: 14px 16px;
  font-size: 15px;
  font-family: inherit;
  color: var(--ink);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.1s;
}

.option-btn:hover:not(:disabled) {
  border-color: var(--lavender-strong);
  background: #f5f1ff;
}

.option-btn:disabled {
  cursor: default;
}

.option-btn.correct {
  border-color: var(--success);
  background: var(--success-bg);
  font-weight: 700;
}

.option-btn.incorrect {
  border-color: var(--danger);
  background: var(--danger-bg);
  font-weight: 700;
}

.feedback-panel {
  border-radius: var(--radius-md);
  padding: 16px 18px;
  margin: 16px 0;
  display: none;
}

.feedback-panel.show {
  display: block;
  animation: fadeIn 0.3s ease;
}

.feedback-panel.correct {
  background: var(--success-bg);
  border: 2px solid var(--success);
}

.feedback-panel.incorrect {
  background: var(--danger-bg);
  border: 2px solid var(--danger);
}

.feedback-title {
  font-weight: 800;
  margin-bottom: 6px;
  font-size: 15px;
}

.feedback-body {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
}

.nav-row {
  display: flex;
  justify-content: flex-end;
  margin-top: 8px;
}

/* Result screen */
.score-circle {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--pink), var(--lavender));
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  margin: 0 auto 24px;
  box-shadow: var(--shadow);
}

.score-circle .score-num {
  font-size: 40px;
  font-weight: 800;
}

.score-circle .score-den {
  font-size: 14px;
  color: var(--ink-soft);
  font-weight: 700;
}

.category-result-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 24px 0;
}

.category-result-row {
  display: flex;
  align-items: center;
  gap: 12px;
  background: #fbfaff;
  border-radius: var(--radius-md);
  padding: 12px 16px;
}

.category-result-row .cat-name {
  font-weight: 700;
  min-width: 90px;
}

.category-result-row .cat-bar-bg {
  flex: 1;
  height: 10px;
  border-radius: 999px;
  background: #eee6ff;
  overflow: hidden;
}

.category-result-row .cat-bar-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--mint-strong), var(--sky-strong));
}

.category-result-row .cat-score {
  font-weight: 700;
  font-size: 13px;
  color: var(--ink-soft);
  min-width: 42px;
  text-align: right;
}

.save-status {
  text-align: center;
  font-size: 13px;
  color: var(--ink-soft);
  margin-top: 12px;
}

/* Certificate */
.certificate-outer {
  padding: 12px;
}

.certificate-card {
  position: relative;
  background: linear-gradient(160deg, #fffdf8 0%, #fff7fb 100%);
  border-radius: 20px;
  border: 3px solid var(--lavender-strong);
  padding: 40px 32px;
  text-align: center;
}

.certificate-card::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 2px dashed var(--pink-strong);
  border-radius: 14px;
  pointer-events: none;
}

.certificate-emoji {
  font-size: 40px;
  margin-bottom: 8px;
}

.certificate-title {
  font-size: 22px;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 4px;
}

.certificate-subtitle {
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 24px;
}

.certificate-name {
  font-size: 26px;
  font-weight: 800;
  margin: 8px 0 4px;
}

.certificate-meta {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 20px;
}

.certificate-body-text {
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 20px;
}

.certificate-score {
  display: inline-block;
  background: var(--mint);
  padding: 8px 22px;
  border-radius: 999px;
  font-weight: 800;
  margin-bottom: 20px;
}

.certificate-footer {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--ink-soft);
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px dashed #e5ddff;
}

.actions-row {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

.actions-row .btn {
  flex: 1;
}

.footer-note {
  text-align: center;
  color: var(--ink-soft);
  font-size: 12px;
  margin-top: 20px;
}