:root {
  --edubal-navy: #1f3a5f;
  --edubal-blue: #3f6fa8;
  --edubal-blue-soft: #eaf1f8;
  --text-main: #2c3338;
  --text-sub: #6b7480;
  --border-soft: #e2e6ea;
  --bg: #ffffff;
  --bg-page: #fafbfc;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", sans-serif;
  background: var(--bg-page);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}

.app-header {
  background: var(--bg);
  border-bottom: 1px solid var(--border-soft);
  padding: 16px 20px;
  display: flex;
  align-items: baseline;
  gap: 10px;
  position: sticky;
  top: 0;
  z-index: 10;
}

.logo {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--edubal-navy);
  letter-spacing: 0.03em;
}

.header-sub {
  font-size: 0.8rem;
  color: var(--text-sub);
}

.app-main {
  max-width: 640px;
  margin: 0 auto;
  min-height: calc(100vh - 60px);
  display: flex;
  flex-direction: column;
}

.screen {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.hidden {
  display: none !important;
}

/* イントロ */
#intro-screen {
  justify-content: center;
  align-items: center;
  padding: 24px;
}

.intro-card {
  background: var(--bg);
  border: 1px solid var(--border-soft);
  border-radius: 16px;
  padding: 32px 28px;
  text-align: center;
  max-width: 460px;
  box-shadow: 0 4px 16px rgba(31, 58, 95, 0.06);
}

.intro-text {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--text-main);
  margin: 0 0 24px;
}

.primary-btn {
  background: var(--edubal-blue);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 13px 32px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, opacity 0.15s ease;
}

.primary-btn:hover {
  background: var(--edubal-navy);
}

.primary-btn:disabled {
  background: #b7c3d1;
  cursor: default;
}

/* チャット */
.chat-log {
  flex: 1;
  padding: 20px 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow-y: auto;
}

.msg {
  max-width: 78%;
  padding: 12px 16px;
  border-radius: 16px;
  line-height: 1.6;
  font-size: 0.93rem;
  white-space: pre-wrap;
  word-break: break-word;
}

.msg-bot {
  align-self: flex-start;
  background: var(--bg);
  border: 1px solid var(--border-soft);
  color: var(--text-main);
  border-bottom-left-radius: 4px;
}

.msg-user {
  align-self: flex-end;
  background: var(--edubal-blue);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.chat-input-area {
  padding: 12px 16px 20px;
  background: var(--bg-page);
  border-top: 1px solid var(--border-soft);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.choice-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.choice-btn {
  background: var(--bg);
  border: 1px solid var(--edubal-blue);
  color: var(--edubal-blue);
  border-radius: 999px;
  padding: 9px 16px;
  font-size: 0.88rem;
  cursor: pointer;
  transition: background 0.12s ease, color 0.12s ease;
}

.choice-btn:hover {
  background: var(--edubal-blue-soft);
}

.choice-btn.selected {
  background: var(--edubal-blue);
  color: #fff;
}

.confirm-btn {
  align-self: flex-start;
}

.text-form {
  display: flex;
  gap: 8px;
}

.text-input {
  flex: 1;
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  padding: 11px 16px;
  font-size: 0.92rem;
  font-family: inherit;
  color: var(--text-main);
  background: var(--bg);
}

.text-input:focus {
  outline: none;
  border-color: var(--edubal-blue);
}

.send-btn {
  background: var(--edubal-blue);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 0 20px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
}

.send-btn:hover {
  background: var(--edubal-navy);
}

.skip-btn {
  align-self: flex-start;
  background: none;
  border: none;
  color: var(--text-sub);
  font-size: 0.82rem;
  text-decoration: underline;
  cursor: pointer;
  padding: 4px 2px;
}

/* 結果画面 */
#result-screen {
  padding: 24px 16px 48px;
}

.result-card {
  background: var(--bg);
  border: 1px solid var(--border-soft);
  border-radius: 16px;
  padding: 28px 24px;
  box-shadow: 0 4px 16px rgba(31, 58, 95, 0.06);
}

.result-title {
  font-size: 1.15rem;
  color: var(--edubal-navy);
  margin: 0 0 20px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--edubal-blue-soft);
}

.result-body {
  display: flex;
  flex-direction: column;
}

.result-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-soft);
}

.result-row:last-child {
  border-bottom: none;
}

.result-label {
  font-size: 0.78rem;
  color: var(--text-sub);
  font-weight: 600;
}

.result-value {
  font-size: 0.96rem;
  color: var(--text-main);
  line-height: 1.6;
}

#submit-btn {
  width: 100%;
  margin-top: 24px;
}

.submit-message {
  margin-top: 14px;
  text-align: center;
  color: var(--edubal-blue);
  font-weight: 600;
  font-size: 0.95rem;
  background: var(--edubal-blue-soft);
  border-radius: 10px;
  padding: 12px;
}

/* スマートフォン対応 */
@media (max-width: 480px) {
  .app-main {
    max-width: 100%;
  }
  .msg {
    max-width: 86%;
  }
  .intro-card {
    padding: 26px 20px;
  }
}