/*
Theme Name: KITT Minimal
Author: KITT
Version: 1.0
*/
:root {
  --kitt-color-correct: #2563eb; /* 正解・完了：青系 */
  --kitt-color-retry: #ea580c;   /* 再挑戦・注意：オレンジ系 */
  --kitt-color-hint: #93c5fd;    /* ヒント：薄青 */

  --kitt-color-bg-correct: #eff6ff; /* 正解・完了背景 */
  --kitt-color-bg-retry: #fff7ed;   /* 再挑戦・注意背景 */
  --kitt-color-bg-hint: #f0f9ff;    /* ヒント背景 */
}

body {
  margin: 40px;
  background-color: #f0f0f0;
  font-family: sans-serif;
}

h1 {
  font-size: 32px;
}

h2 {
  color: #333;
}

/* ========================================
   KITT Lesson Base
======================================== */

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

.container > h1 {
  margin-bottom: 32px;
}

/* 現テンプレート上では未使用の可能性あり。
   本番前の全面整理までは削除せず保留。 */
.kitt-lesson-container {
  max-width: 800px;
}

/* ========================================
   KITT Lesson Layout / Step Nav
======================================== */

.kitt-lesson-layout {
  display: flex;
  gap: 24px;
  align-items: flex-start;
}

.kitt-step-nav {
  width: 140px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex-shrink: 0;
}

.kitt-step-nav button {
  display: flex;
  width: 100%;
  padding: 12px 10px;
  border: 1px solid #ccc;
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
  text-align: left;
  font-size: 14px;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  transition: all 0.2s ease;
}

.kitt-step-nav-label {
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
}

.kitt-step-nav-state {
  font-size: 12px;
  line-height: 1.2;
  opacity: 0.9;
}

.kitt-step-nav button.is-current {
  background: #222;
  color: #fff;
  border-color: #222;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.16);
}

.kitt-step-nav button.is-done {
  background: #e8f7e8;
  color: #1f6b1f;
  border-color: #b7e0b7;
}

.kitt-step-nav button.is-done .kitt-step-nav-state::before {
  content: "✓ ";
  font-weight: 700;
}

.kitt-step-nav button.is-upcoming {
  background: #ffffff;
  color: #667085;
  border-color: #d0d5dd;
}

.kitt-step-nav button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  box-shadow: none;
}

.kitt-lesson-main {
  flex: 1;
  min-width: 0;
  margin-top: 8px;
}

/* ========================================
   KITT Progress Bar
======================================== */

.kitt-progress-wrap {
  margin-top: -8px;
  margin-bottom: 16px;
}

.kitt-progress-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.kitt-progress-step-text,
.kitt-progress-percent-text {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
  color: #344054;
}

.kitt-progress {
  width: 100%;
  height: 10px;
  margin-top: -8px;
  margin-bottom: 16px;
  background: #ddd;
  border-radius: 6px;
  overflow: hidden;
}

.kitt-progress-bar {
  width: 0%;
  height: 100%;
  background: #2c7be5;
  transition: width 0.3s ease;
}

/* ========================================
   KITT Lesson Step Design
======================================== */

.kitt-step {
  display: none;
  margin: 0 0 32px;
  border: 1px solid #dcdfe3;
  border-radius: 14px;
  overflow: hidden;
  background: #ffffff;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.06);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.kitt-step.active {
  display: block;
}

.kitt-step:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
}

.step-header {
  padding: 14px 18px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.5px;
  color: #ffffff;
}

.step1 .step-header {
  background: #2c7be5;
}

.step2 .step-header {
  background: #00a65a;
}

.step3 .step-header {
  background: #f39c12;
}

.step4 .step-header {
  background: var(--kitt-color-correct);
}

/* 現テンプレートでは主に .step-content を使用。
   .step-body は互換維持のため残す。 */
.step-body,
.step-content {
  margin: 0;
  padding: 18px;
  font-size: 16px;
  line-height: 1.9;
  color: #222222;
  background: #ffffff;
}

.step-body p,
.step-content p {
  margin: 0 0 1em;
}

.step-body p:last-child,
.step-content p:last-child {
  margin-bottom: 0;
}

.step-body ul,
.step-body ol,
.step-content ul,
.step-content ol {
  margin: 0 0 1em 1.4em;
}

.step-body li,
.step-content li {
  margin-bottom: 0.4em;
}

.step-body strong,
.step-content strong {
  font-weight: 700;
}

.step-body a,
.step-content a {
  text-decoration: underline;
}

.step-actions {
  margin-top: 16px;
  padding: 0 18px 18px;
}

.step-feedback {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.6;
  color: #555;
  min-height: 1.6em;
}

.step-feedback.is-success,
#step4-feedback.is-success {
  color: #166534;
  font-weight: 700;
}

.step-feedback.is-success,
#step4-feedback.is-success,
#step4-feedback.kitt-feedback--correct,
#step4-feedback.kitt-feedback--complete {
  color: #1e40af;
  font-weight: 700;
}

.step-feedback.is-error,
#step4-feedback.is-error,
#step4-feedback.kitt-feedback--retry {
  color: var(--kitt-color-retry);
  font-weight: 700;
}

/* ========================================
   Step4 Lock UI
======================================== */

.step-check-area {
  padding: 0 18px 18px;
}

.step-check-area input[type="text"] {
  width: 100%;
  max-width: 320px;
  box-sizing: border-box;
  margin-bottom: 10px;
  padding: 10px 12px;
  font-size: 16px;
  border: 1px solid #ccd3db;
  border-radius: 8px;
}

.step-check-area button,
.step-actions button {
  display: inline-block;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 700;
  border: none;
  border-radius: 8px;
  background: #2c7be5;
  color: #fff;
  cursor: pointer;
}

.step-check-area button:hover,
.step-actions button:hover {
  opacity: 0.92;
}

.step-actions button[disabled],
#step4-check:disabled {
  background: #9aa5b1;
  cursor: not-allowed;
  opacity: 0.55;
}

.step-check-area input[type="text"]:disabled,
#step4-answer:disabled {
  background: #f5f7fa;
  color: #667085;
  cursor: not-allowed;
}

#step4-feedback {
  display: block;
  margin: 16px 0 6px;
  padding: 0 18px;
  min-height: 0;
  font-size: 14px;
  line-height: 1.6;
  color: #555;
  box-sizing: border-box;
}

#step4-feedback.is-rescue,
#step4-feedback.kitt-feedback--hint {
  margin: 16px 24px 0;
  padding: 12px 16px;
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.6;
  color: #1e40af;
  background: var(--kitt-color-bg-hint);
  border: 1px solid var(--kitt-color-hint);
  border-radius: 8px;
}

.step4-hint-area {
  margin: 0;
  padding: 0 18px;
  box-sizing: border-box;
}

.step4-hint-controls {
  display: block;
  margin: 6px 0 10px;
  padding: 0;
}

.step4-hint-button,
.step4-hint-controls button,
button.step4-hint-button {
  display: inline-block;
  margin: 0;
  vertical-align: top;
}

.step4-hint-box {
  display: none;
  margin-top: 10px;
  margin-bottom: 14px;
  padding: 12px 14px;
  background: #f7f9fc;
  border: 1px solid #d9e2f0;
  border-radius: 10px;
  line-height: 1.7;
}

.step4-main-actions {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.step4-back-button,
.step4-back-button.is-rescue-only {
  display: none;
}

.step4-back-button.is-visible,
.step4-back-button.is-rescue-only.is-visible {
  display: inline-block;
}

/* ========================================
   Lesson Complete Area
======================================== */

.lesson-complete-message {
  display: none;
  flex-direction: column;
  align-items: stretch;
  gap: 16px;
  margin-top: 24px;
  padding: 24px;
  background: var(--kitt-color-bg-correct);
  border: 1px solid #bfdbfe;
  border-radius: 16px;
  color: #1e40af;
  font-weight: 700;
}

.lesson-complete-copy {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.lesson-complete-title,
.lesson-complete-text {
  margin: 0;
}

.lesson-complete-title {
  font-size: 18px;
  font-weight: 700;
}

.lesson-complete-text {
  max-width: 34em;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.9;
  color: #1e3a8a;
}

.step4-explanation {
  margin-top: 4px;
  line-height: 1.8;
}

.lesson-complete-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 8px;
}

.kitt-day-next-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 12px 20px;
  background-color: #3b82f6;
  color: #ffffff;
  border-radius: 10px;
  text-decoration: none;
  white-space: nowrap;
  font-weight: 600;
  line-height: 1;
}

.kitt-day-next-button:hover {
  opacity: 0.9;
}

/* ========================================
   KITT My Page
======================================== */

.kitt-mypage {
  max-width: 520px;
  margin: 0 auto;
  padding: 24px 20px 64px;
}

.kitt-mypage h2 {
  margin-bottom: 24px;
  font-size: 28px;
  line-height: 1.4;
}

.kitt-mypage-card {
  margin-bottom: 28px;
  padding: 20px 22px;
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 12px;
}

.kitt-mypage-card h3 {
  margin: 0 0 16px;
  font-size: 20px;
  line-height: 1.4;
}

.kitt-mypage-card p {
  margin: 0 0 14px;
  line-height: 1.8;
}

.kitt-mypage-progress-meta {
  margin: 10px 0;
  font-size: 15px;
  line-height: 1.7;
  color: #555;
}

.kitt-mypage-button {
  display: inline-block;
  margin-top: 8px;
  padding: 12px 22px;
  color: #fff;
  background: #1f6feb;
  border: none;
  border-radius: 8px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.kitt-mypage-button:hover {
  color: #fff;
  background: #185abc;
  text-decoration: none;
}

.kitt-mypage-button-secondary {
  margin-left: 10px;
  background: #555;
}

.kitt-mypage-button-secondary:hover {
  background: #333;
}

.kitt-course-select-form {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 18px;
}

/* ========================================
   My Page - Course Name
======================================== */

.kitt-mypage-course-name {
  margin: 8px 0 0;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.6;
}

/* ========================================
   Login Page
======================================== */

.kitt-login-box {
  max-width: 520px;
  margin: 80px auto 0;
  padding: 32px;
  background: #ffffff;
  border: 1px solid #ddd;
  border-radius: 14px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.06);
}

.kitt-login-box h2 {
  margin-top: 0;
  margin-bottom: 24px;
  text-align: center;
}

.kitt-login-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.kitt-login-field label {
  font-weight: 700;
}

.kitt-login-field input {
  width: 100%;
  padding: 10px 12px;
  font-size: 16px;
  border: 1px solid #bbb;
  border-radius: 8px;
  box-sizing: border-box;
}

.kitt-login-remember {
  font-size: 14px;
}

.kitt-login-submit,
.kitt-login-button {
  display: inline-block;
  padding: 10px 22px;
  background: #2563eb;
  color: #ffffff;
  border: none;
  border-radius: 8px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.kitt-login-submit:hover,
.kitt-login-button:hover {
  opacity: 0.9;
}

.kitt-login-error {
  margin-bottom: 16px;
  padding: 12px 14px;
  background: #fff1f2;
  border: 1px solid #fecdd3;
  border-radius: 8px;
  color: #9f1239;
  font-weight: 700;
}

.kitt-login-success {
  margin-bottom: 16px;
  padding: 12px 14px;
  background: #ecfdf5;
  border: 1px solid #bbf7d0;
  border-radius: 8px;
  color: #166534;
  font-weight: 700;
}

/* ========================================
   My Page Logout
======================================== */

.kitt-mypage-logout {
  max-width: 520px;
  margin: 24px auto 0;
  text-align: right;
}

.kitt-logout-button {
  display: inline-block;
  padding: 9px 18px;
  background: /*#f3f4f6*/#FFF;
  color: #374151;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-weight: 700;
  text-decoration: none;
}

.kitt-logout-button:hover {
  background: #f3f4f6;
  color: #111827;
  text-decoration: none;
}

/* ==============================
   KITT Lesson Body Readability v0.1
   Lesson本文の可読性確認用
   ============================== */

.kitt-step-body {
  font-size: 17px;
  line-height: 1.8;
}

.kitt-step-body p {
  margin: 0 0 1em;
}

.kitt-note,
.kitt-point {
  margin: 1.4em 0;
  padding: 1em 1.1em;
  border: 1px solid #d9e2ec;
  border-radius: 10px;
  background: #f8fafc;
}

.kitt-box-title {
  display: block;
  margin-bottom: 0.6em;
  font-weight: 700;
}

.kitt-key {
  font-weight: 700;
}

.kitt-note p,
.kitt-point p {
  margin: 0 0 0.6em;
}

.kitt-note p:last-child,
.kitt-point p:last-child {
  margin-bottom: 0;
}

/* ==============================
   KITT Lesson Practice v0.1
   練習問題・注目ボックス用
   ============================== */

.kitt-focus-box {
  margin: 1.4em 0;
  padding: 1em 1.1em;
  border: 1px solid #d9e2ec;
  border-radius: 10px;
  background: #f8fafc;
}

.kitt-focus {
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1.5px;
}

.kitt-practice {
  margin: 1.4em 0;
}

.kitt-question {
  margin: 0 0 0.4em;
  font-weight: 700;
}

.kitt-answer {
  margin: 0 0 1.2em;
}

.kitt-answer:last-child {
  margin-bottom: 0;
}

@media (max-width: 600px) {
  .kitt-step-body {
    font-size: 16px;
    line-height: 1.8;
  }

  .kitt-note,
  .kitt-point {
    padding: 0.9em 1em;
  }
}

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

@media (max-width: 768px) {
  .container {
    padding: 24px 18px 40px;
  }

  .container > h1 {
    margin-bottom: 24px;
  }

  .kitt-progress-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .kitt-lesson-layout {
    flex-direction: column;
    gap: 18px;
  }

  .kitt-step-nav {
    width: 100%;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 10px;
  }

  .kitt-step-nav button {
    width: calc(50% - 5px);
    min-width: 0;
    align-items: center;
    text-align: center;
    padding: 12px 10px;
    font-size: 14px;
  }

  .kitt-lesson-main {
    width: 100%;
    margin-top: 0;
  }

  .kitt-progress {
    margin-top: 0;
    margin-bottom: 16px;
  }

  .step-header {
    padding: 13px 16px;
    font-size: 17px;
  }

  .step-content,
  .step-body {
    padding: 16px;
    font-size: 15px;
  }

  .step-actions,
  .step-check-area {
    padding: 0 16px 1px;
  }

  .step-check-area input[type="text"] {
    max-width: 100%;
    font-size: 16px;
  }

  .lesson-complete-message {
    align-items: stretch;
    gap: 14px;
    padding: 20px 16px;
  }

  .lesson-complete-actions {
    width: 100%;
    justify-content: center;
  }

  .kitt-day-next-button {
    text-align: center;
    width: 100%;
    max-width: 300px;
    margin: 0 auto;
    }
  }

@media (max-width: 640px) {
  .container {
    padding: 24px 20px 40px;
  }

  .step-header {
    padding: 12px 15px;
    font-size: 16px;
  }

  .step-content,
  .step-body {
    padding: 15px;
    font-size: 15px;
  }

  .lesson-complete-actions {
    justify-content: center;
  }

  .kitt-day-next-button {
    width: 100%;
    max-width: 280px;
  }
}

/* ========================================
   My Page Responsive
======================================== */

@media (max-width: 640px) {
  body {
    margin: 0;
  }

  .container {
    padding: 20px 16px 32px;
  }

  .container > h1 {
    margin-bottom: 18px;
    font-size: 28px;
  }

  .kitt-mypage {
    padding: 12px 0 40px;
  }

  .kitt-mypage h2 {
    margin: 0 0 18px;
    font-size: 26px;
  }

  .kitt-mypage-card {
    margin-bottom: 18px;
    padding: 18px 20px;
  }

  .kitt-mypage-card h3 {
    margin-bottom: 12px;
    font-size: 20px;
  }

  .kitt-mypage-card p {
    margin-bottom: 10px;
    line-height: 1.75;
  }

  .kitt-mypage-logout {
    margin: 18px auto 0;
    padding: 0 16px;
  }
}

@media (max-width: 640px) {
  .kitt-mypage > h2 {
    display: none;
  }

  .kitt-mypage {
    padding-top: 0;
  }
}


/* ========================================
   KITT My Page Review MVP
======================================== */

.kitt-mypage-last-card,
.kitt-mypage-review-card,
.kitt-mypage-history-card,
.kitt-mypage-next-muted-card {
  border-color: #d9e2f0;
}

.kitt-review-card-list {
  display: grid;
  gap: 14px;
}

.kitt-review-card-item {
  padding: 14px 16px;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  background: #f8fafc;
}

.kitt-review-card-item--gate-block {
  background: #fff7ed;
  border-color: #fed7aa;
}

.kitt-review-card-item--gate-hint {
  background: #eff6ff;
  border-color: #bfdbfe;
}

.kitt-review-card-item--step-check {
  background: #f8fafc;
  border-color: #d9e2f0;
}

.kitt-review-card-label {
  display: inline-flex;
  width: fit-content;
  margin: 0 0 8px;
  padding: 4px 10px;
  border-radius: 999px;
  background: #ffffff;
  border: 1px solid #d1d5db;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.4;
}

.kitt-review-card-title {
  margin: 0 0 6px;
  font-weight: 700;
  line-height: 1.6;
}

.kitt-review-card-text {
  margin-bottom: 10px;
}

.kitt-mypage-button-light {
  color: #1f2937;
  background: #ffffff;
  border: 1px solid #d1d5db;
}

.kitt-mypage-button-light:hover {
  color: #111827;
  background: #f3f4f6;
}

.kitt-mypage-history-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.kitt-mypage-history-list li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid #e5e7eb;
}

.kitt-mypage-history-list li:last-child {
  border-bottom: 0;
}

.kitt-mypage-history-title {
  font-weight: 700;
  line-height: 1.6;
}

.kitt-mypage-history-date {
  color: #667085;
  font-size: 13px;
  line-height: 1.6;
  white-space: nowrap;
}

@media (max-width: 640px) {
  .kitt-mypage-history-list li {
    flex-direction: column;
    gap: 2px;
  }

  .kitt-mypage-history-date {
    white-space: normal;
  }
}


/* ========================================
   KITT Lesson Anchor MVP
======================================== */

.kitt-step,
.kitt-step-check,
.kitt-anchor-target {
  scroll-margin-top: 88px;
}

.kitt-anchor-target {
  display: block;
  height: 1px;
  margin-top: -1px;
}

/* ========================================
   KITT My Page Mobile Polish
   mypage スマホ表示の微調整
======================================== */

@media (max-width: 640px) {
  body {
    padding-left: 0;
    padding-right: 0;
  }

  body > h1,
  .site-title,
  header h1 {
    padding-left: 16px;
    padding-right: 16px;
  }

  .container > h1 {
    padding-left: 4px;
    padding-right: 4px;
  }

  .kitt-mypage {
    width: 100%;
    box-sizing: border-box;
  }

  .kitt-mypage-card {
    border-radius: 10px;
  }

  .kitt-review-card-item {
    padding: 16px 14px;
  }

  .kitt-review-card-text,
  .kitt-mypage-card p {
    line-height: 1.85;
  }

  .kitt-mypage-button {
    min-height: 44px;
    box-sizing: border-box;
  }
}

/* ========================================
   KITT Gate Mobile Input Fix
   Gate5問のスマホ入力欄が縦に巨大化する問題を修正
======================================== */

@media (max-width: 640px) {
  input.kitt-gate-answer,
  .kitt-gate-answer {
    flex: 0 0 auto;
    min-height: 44px;
    height: auto;
    box-sizing: border-box;
  }

  input.kitt-gate-answer {
    padding: 10px 12px;
    font-size: 16px;
    line-height: 1.4;
  }

  .kitt-gate-answer-area {
    gap: 10px;
  }
}

/* KITT Gate: hint button layout */
.kitt-gate-hint-area {
  margin-top: 12px;
  margin-bottom: 12px;
}

.kitt-gate-hint-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: auto;
  min-width: 150px;
  max-width: 220px;
  padding: 10px 18px;
  border: 0;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.4;
  cursor: pointer;
}

.kitt-gate-hint-button:disabled {
  cursor: default;
  opacity: 0.55;
}

.kitt-gate-hint {
  margin-top: 10px;
  font-size: 1rem;
  line-height: 1.7;
}

.kitt-gate-feedback {
  margin-top: 10px;
  font-size: 1rem;
  line-height: 1.7;
}

.kitt-gate-explanation {
  margin-top: 12px;
  padding: 12px 14px;
  border: 1px solid #dbeafe;
  border-radius: 12px;
  background: #f8fbff;
  color: #334155;
  font-size: 0.95rem;
  line-height: 1.7;
  white-space: pre-line;
}

.kitt-gate-complete-actions {
  margin-top: 16px;
}

.kitt-gate-result-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 16px;
  border: none;
  border-radius: 999px;
  background: #2563eb;
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
}

.kitt-gate-result-button:hover {
  opacity: 0.9;
}

.kitt-gate-finish {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 16px;
  border: none;
  border-radius: 999px;
  background: #2563eb;
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.4;
  cursor: pointer;
}

.kitt-gate-finish:hover {
  opacity: 0.9;
}

.kitt-gate-next {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 12px;
  padding: 9px 16px;
  border: none;
  border-radius: 999px;
  background: #2563eb;
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.4;
  cursor: pointer;
}

.kitt-gate-next:hover {
  opacity: 0.9;
}

/* KITT英語 Lesson本文用ボックス */

.kitt-box {
  margin: 24px 0;
  padding: 18px 20px;
  border-radius: 12px;
  border: 2px solid #d8e2ee;
  background: #f8fbff;
  line-height: 1.9;
}

.kitt-box h4 {
  margin: 0 0 12px;
  font-size: 1.05rem;
  font-weight: 700;
}

.kitt-box--point {
  border-color: #2f80ed;
  background: #eef6ff;
}

.kitt-box--focus {
  border-color: #27ae60;
  background: #f0fff6;
}

.kitt-box--compare {
  border-color: #f2994a;
  background: #fff7ee;
}

.kitt-box--warning {
  border-color: #eb5757;
  background: #fff1f1;
}

.kitt-box--summary {
  border-color: #2f80ed;
  background: #f5f9ff;
}

.kitt-box--gate {
  border-color: #9b51e0;
  background: #faf5ff;
}

.kitt-example {
  margin: 14px 0;
  padding: 12px 16px;
  border-left: 5px solid #2f80ed;
  background: #ffffff;
  border-radius: 8px;
}

.kitt-change {
  margin: 16px 0;
  padding: 14px 16px;
  background: #f6f7f9;
  border-radius: 8px;
  text-align: center;
  font-weight: 700;
}

.kitt-formula {
  margin: 12px 0;
  padding: 10px 14px;
  background: #fff;
  border: 1px solid #d8e2ee;
  border-radius: 8px;
  font-weight: 700;
}

.kitt-ng {
  margin: 14px 0;
  padding: 12px 16px;
  border-left: 5px solid #eb5757;
  background: #fff;
  border-radius: 8px;
  font-weight: 700;
}

.kitt-box ul,
.kitt-box ol {
  margin: 12px 0 12px 1.5em;
}

.kitt-box li {
  margin: 6px 0;
}
/* KITT Gate choice buttons */
.kitt-gate-choices {
  display: grid;
  gap: 12px;
  margin: 16px 0 18px;
}

.kitt-gate-choice {
  display: block;
  width: 100%;
  padding: 14px 16px;
  border: 2px solid #d7e3f7;
  border-radius: 14px;
  background: #ffffff;
  color: #1f2937;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease, transform 0.05s ease;
}

.kitt-gate-choice:hover,
.kitt-gate-choice:focus {
  border-color: #2563eb;
  background: #eff6ff;
  outline: none;
}

.kitt-gate-choice:active {
  transform: translateY(1px);
}

.kitt-gate-choice:disabled {
  cursor: default;
  opacity: 0.8;
}

/* KITT Gate choice buttons background override */
.kitt-gate-choice {
  background: #f3f8ff;
  border-color: #bfdbfe;
  box-shadow: 0 2px 0 rgba(37, 99, 235, 0.08);
}

.kitt-gate-choice:hover,
.kitt-gate-choice:focus {
  background: #eaf2ff;
  border-color: #2563eb;
}

.kitt-gate-choice:disabled {
  background: #f1f5f9;
  color: #64748b;
  box-shadow: none;
}

/* ==============================
   KITT英語 共通色枠 v0.1
   青＝ゴール
   黄＝重要ルール
   橙＝文の形
   緑＝正しい例文
   水色＝形の変化
   灰＝補足・見るだけ
   赤＝間違い例
   ============================== */

.kitt-lesson-intro {
  margin: 0 0 28px;
  padding: 18px 20px;
  background: #f8fbff;
  border: 2px solid #bfdbfe;
  border-radius: 12px;
}

.kitt-lesson-intro h2,
.kitt-lesson-intro h3 {
  margin-top: 0;
}

.kitt-formula-box {
  margin: 14px 0;
  padding: 14px 16px;
  background: #fff7ed;
  border: 2px solid #fdba74;
  border-radius: 10px;
}

.kitt-example-box {
  margin: 14px 0;
  padding: 14px 16px;
  background: #f0fdf4;
  border: 2px solid #86efac;
  border-radius: 10px;
}

.kitt-change-box {
  margin: 14px 0;
  padding: 14px 16px;
  background: #eff6ff;
  border: 2px solid #93c5fd;
  border-radius: 10px;
  text-align: center;
}

.kitt-key-message-box {
  margin: 18px 0;
  padding: 16px 18px;
  background: #fefce8;
  border: 2px solid #facc15;
  border-radius: 12px;
  text-align: center;
}

.kitt-key-message-box strong {
  font-size: 1.08em;
}

.kitt-note-box {
  margin: 14px 0;
  padding: 14px 16px;
  background: #f9fafb;
  border: 2px solid #d1d5db;
  border-radius: 10px;
}

.kitt-mistake-box {
  margin: 16px 0;
  padding: 14px 16px;
  background: #fef2f2;
  border: 2px solid #f87171;
  border-radius: 10px;
}

.kitt-step-section {
  margin-top: 28px;
}

.kitt-formula-box p,
.kitt-example-box p,
.kitt-change-box p,
.kitt-key-message-box p,
.kitt-note-box p,
.kitt-mistake-box p {
  margin-top: 0;
}

.kitt-formula-box p:last-child,
.kitt-example-box p:last-child,
.kitt-change-box p:last-child,
.kitt-key-message-box p:last-child,
.kitt-note-box p:last-child,
.kitt-mistake-box p:last-child {
  margin-bottom: 0;
}


/* KITT英語 共通色枠 補助クラス v0.1
   目的：既存HTMLで使っている list / compare / column 系の枠を共通ルールに寄せる。
   注意：Stepタイトル用の新デザインは追加しない。
*/

/* 一覧・見るポイント用 */
.kitt-list-box {
  margin: 18px 0;
  padding: 16px 18px;
  background: #fffbeb;
  border: 2px solid #facc15;
  border-radius: 12px;
}

.kitt-list-box p {
  margin: 0 0 10px;
}

.kitt-list-box p:last-child {
  margin-bottom: 0;
}

/* 比較・見分け用 */
.kitt-compare-box {
  margin: 18px 0;
  padding: 16px 18px;
  background: #eff6ff;
  border: 2px solid #93c5fd;
  border-radius: 12px;
}

.kitt-compare-box p {
  margin: 0 0 12px;
}

.kitt-compare-box p:last-child {
  margin-bottom: 0;
}

/* コラム・見るだけ補足用 */
.kitt-column-box {
  margin: 22px 0;
  padding: 18px 20px;
  background: #f9fafb;
  border: 2px solid #d1d5db;
  border-radius: 12px;
}

.kitt-column-box h3 {
  margin-top: 0;
}

.kitt-column-box p {
  margin: 0 0 10px;
}

.kitt-column-box p:last-child {
  margin-bottom: 0;
}

/* 間違い例の × 表示 */
.kitt-mistake-box span[aria-hidden="true"] {
  font-weight: 700;
  color: #c62828;
  margin-right: 4px;
}

/* ページ全体の背景 */
body.page-template-default,
body.page {
  background: #ffffff;
}

/* Lesson0 体験終了ページ */
.kitt-demo-end-page {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 20px 64px;
  line-height: 1.8;
}

.kitt-demo-end-hero {
  background: #ffffff;
  border: 2px solid #dbeafe;
  border-radius: 18px;
  padding: 28px 30px;
  margin-bottom: 28px;
  box-shadow: 0 8px 22px rgba(15, 23, 42, 0.06);
}

.kitt-demo-end-label {
  display: inline-block;
  margin: 0 0 10px;
  padding: 4px 12px;
  border-radius: 999px;
  background: #eff6ff;
  color: #1d4ed8;
  font-size: 14px;
  font-weight: 700;
}

.kitt-demo-end-hero h1 {
  margin: 0 0 16px;
  font-size: 28px;
  line-height: 1.4;
}

.kitt-demo-end-section {
  border-radius: 18px;
  padding: 26px 30px;
  margin-bottom: 24px;
}

.kitt-demo-end-section h2 {
  margin-top: 0;
  margin-bottom: 18px;
  font-size: 24px;
}

.kitt-demo-end-child {
  background: #f0fdf4;
  border: 2px solid #bbf7d0;
}

.kitt-demo-end-parent {
  background: #f8fafc;
  border: 2px solid #dbe3ec;
}

.kitt-demo-end-child strong {
  color: #166534;
}

.kitt-demo-end-actions {
  text-align: center;
  margin-top: 34px;
}

.kitt-demo-end-main-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  padding: 0 28px;
  border-radius: 999px;
  background: #2563eb;
  color: #ffffff;
  font-weight: 700;
  font-size: 16px;
  line-height: 1.2;
  text-decoration: none;
  box-shadow: 0 8px 18px rgba(37, 99, 235, 0.25);
  box-sizing: border-box;
}

.kitt-demo-end-main-button:hover,
.kitt-demo-end-main-button:focus {
  background: #1d4ed8;
  color: #ffffff;
  text-decoration: none;
}

@media (max-width: 640px) {
  .kitt-demo-end-page {
    padding: 24px 16px 48px;
  }

  .kitt-demo-end-hero,
  .kitt-demo-end-section {
    padding: 22px 20px;
    border-radius: 16px;
  }

  .kitt-demo-end-hero h1 {
    font-size: 24px;
  }

  .kitt-demo-end-section h2 {
    font-size: 21px;
  }

  .kitt-demo-end-main-button {
    display: flex;
    width: 100%;
    min-height: 56px;
  }
}

/* Lesson0終了ページ：外側背景 */
html,
body {
  background: #ffffff !important;
}

/* 念のため、テーマ外枠も白にする */
.container {
  background: transparent !important;
}

/* Lesson0終了ページ：ボタン中央寄せ */
.kitt-demo-end-main-button {
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  min-height: 56px;
  padding: 0 28px !important;
  line-height: 1.2 !important;
  box-sizing: border-box;
}

/* =========================
   KITT英語 公式サイト 共通CSS v0.1
   対象：kitt-study.jp 固定ページ
========================= */

.kitt-site-page {
  max-width: 920px;
  margin: 0 auto;
  padding: 40px 20px 64px;
  color: #1f2937;
  font-size: 16px;
  line-height: 1.9;
}

.kitt-site-page *,
.kitt-site-page *::before,
.kitt-site-page *::after {
  box-sizing: border-box;
}

.kitt-site-page p {
  margin: 0 0 18px;
}

.kitt-site-page h1,
.kitt-site-page h2,
.kitt-site-page h3 {
  color: #111827;
  line-height: 1.45;
}

.kitt-site-page h1 {
  margin: 0 0 24px;
  font-size: clamp(30px, 5vw, 48px);
  font-weight: 800;
  letter-spacing: 0.02em;
}

.kitt-site-page h2 {
  margin: 0 0 20px;
  font-size: clamp(24px, 3.5vw, 34px);
  font-weight: 800;
}

.kitt-site-page h3 {
  margin: 0 0 12px;
  font-size: 20px;
  font-weight: 800;
}

.kitt-site-eyebrow {
  margin: 0 0 14px;
  color: #2563eb;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.kitt-site-hero {
  margin: 0 0 56px;
  padding: 40px 36px;
  background: #f8fbff;
  border: 2px solid #bfdbfe;
  border-radius: 20px;
}

.kitt-site-section {
  margin: 0 0 44px;
  padding: 34px 0;
}

.kitt-site-section-soft {
  padding: 34px 32px;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 18px;
}

.kitt-site-card,
.kitt-site-note,
.kitt-site-message-box {
  margin: 24px 0;
  padding: 22px 24px;
  background: #ffffff;
  border: 1px solid #dbeafe;
  border-radius: 16px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
}

.kitt-site-note {
  background: #eff6ff;
  border-color: #bfdbfe;
}

.kitt-site-message-box {
  background: #fff7ed;
  border-color: #fed7aa;
}

.kitt-site-list,
.kitt-site-number-list {
  margin: 18px 0 22px;
  padding-left: 1.4em;
}

.kitt-site-list li,
.kitt-site-number-list li {
  margin: 6px 0;
}

.kitt-site-button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 0;
}

.kitt-site-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 800;
  line-height: 1.4;
  text-decoration: none;
  transition: transform 0.08s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.kitt-site-button:hover,
.kitt-site-button:focus {
  transform: translateY(-1px);
  text-decoration: none;
}

.kitt-site-button-primary {
  color: #ffffff;
  background: #2563eb;
  box-shadow: 0 8px 18px rgba(37, 99, 235, 0.25);
}

.kitt-site-button-primary:hover,
.kitt-site-button-primary:focus {
  color: #ffffff;
  background: #1d4ed8;
}

.kitt-site-button-secondary {
  color: #1d4ed8;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
}

.kitt-site-button-secondary:hover,
.kitt-site-button-secondary:focus {
  color: #1e40af;
  background: #dbeafe;
}

.kitt-step-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin: 28px 0 0;
}

.kitt-step-card {
  padding: 22px 20px;
  background: #ffffff;
  border: 1px solid #dbeafe;
  border-radius: 16px;
  box-shadow: 0 8px 22px rgba(15, 23, 42, 0.06);
}

.kitt-step-label {
  display: inline-flex;
  align-items: center;
  margin: 0 0 12px;
  padding: 4px 10px;
  color: #1d4ed8;
  background: #eff6ff;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 800;
}

.kitt-site-cta {
  padding: 36px 32px;
  background: #eef6ff;
  border: 2px solid #bfdbfe;
  border-radius: 20px;
}

.kitt-site-contact-box {
  padding: 32px;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 18px;
}

/* トップページの固定ページタイトル「トップページ」を非表示 */
body.home .entry-title,
body.front-page .entry-title {
  display: none;
}

/* スマホ調整 */
@media (max-width: 768px) {
  .kitt-site-page {
    padding: 24px 16px 48px;
    font-size: 15px;
    line-height: 1.85;
  }

  .kitt-site-hero {
    padding: 28px 20px;
    border-radius: 16px;
  }

  .kitt-site-section {
    margin-bottom: 32px;
    padding: 26px 0;
  }

  .kitt-site-section-soft,
  .kitt-site-cta,
  .kitt-site-contact-box {
    padding: 26px 20px;
    border-radius: 16px;
  }

  .kitt-step-flow {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .kitt-site-button-row {
    display: grid;
    grid-template-columns: 1fr;
  }

  .kitt-site-button {
    width: 100%;
  }
}

/* KITT公式ページ：本文HTMLの直前にある固定ページタイトルだけ消す */
body.page-id-234 .container > h2:first-child,
body.page-id-237 .container > h2:first-child,
body.page-id-240 .container > h2:first-child,
body.page-id-245 .container > h2:first-child,
body.page-id-247 .container > h2:first-child,
body.page-id-249 .container > h2:first-child,
body.page-id-251 .container > h2:first-child,
body.page-id-253 .container > h2:first-child,
body.page-id-258 .container > h2:first-child,
body.page-id-264 .container > h2:first-child {
  display: none;
}

@media (max-width: 600px) {
  .kitt-site-page h2 {
    font-size: 22px;
    line-height: 1.35;
    letter-spacing: 0;
  }
}

/* お問い合わせフォーム*/
.kitt-card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin: 24px 0;
}

.kitt-card {
  padding: 18px 20px;
  background: #ffffff;
  border: 1px solid #dbeafe;
  border-radius: 14px;
  box-shadow: 0 8px 22px rgba(15, 23, 42, 0.04);
}

.kitt-card h3 {
  margin-top: 0;
  font-size: 20px;
}

.kitt-card p:last-child {
  margin-bottom: 0;
}

.kitt-form-placeholder {
  padding: 20px;
  background: #f8fbff;
  border: 1px dashed #bfdbfe;
  border-radius: 14px;
}

@media (max-width: 700px) {
  .kitt-card-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .kitt-card {
    padding: 16px;
  }
}
/* ==================================================
   KITT英語 学習サイト 共通ヘッダー・フッター
   ================================================== */

.kitt-site-header {
  width: 100%;
  background: #ffffff;
  border-bottom: 1px solid #dbe4f0;
}

.kitt-site-header__inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.kitt-site-brand {
  flex: 0 0 auto;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
}

.kitt-site-brand a {
  color: #1f2937;
  text-decoration: none;
}

.kitt-site-nav__list {
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 8px 20px;
  list-style: none;
}

.kitt-site-nav__item {
  margin: 0;
  padding: 0;
}

.kitt-site-nav__item a {
  color: #334155;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
}

.kitt-site-nav__item a:hover,
.kitt-site-nav__item a:focus {
  color: #2563eb;
  text-decoration: underline;
}

.kitt-site-footer {
  width: 100%;
  margin-top: 56px;
  background: #f8fafc;
  border-top: 1px solid #dbe4f0;
}

.kitt-site-footer__inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 32px 24px 24px;
}

.kitt-site-footer-nav__list {
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px 24px;
  list-style: none;
}

.kitt-site-footer-nav__item {
  margin: 0;
  padding: 0;
}

.kitt-site-footer-nav__item a {
  color: #475569;
  font-size: 14px;
  text-decoration: none;
}

.kitt-site-footer-nav__item a:hover,
.kitt-site-footer-nav__item a:focus {
  color: #2563eb;
  text-decoration: underline;
}

.kitt-site-footer__copyright {
  margin: 24px 0 0;
  color: #64748b;
  font-size: 13px;
  text-align: center;
}

@media (max-width: 767px) {
  .kitt-site-header__inner {
    padding: 14px 18px;
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .kitt-site-brand {
    font-size: 20px;
  }

  .kitt-site-nav {
    width: 100%;
  }

  .kitt-site-nav__list {
    justify-content: flex-start;
    gap: 10px 18px;
  }

  .kitt-site-nav__item a {
    font-size: 14px;
  }

  .kitt-site-footer {
    margin-top: 40px;
  }

  .kitt-site-footer__inner {
    padding: 28px 18px 22px;
  }

  .kitt-site-footer-nav__list {
    justify-content: flex-start;
    gap: 10px 18px;
  }
}

/* ==================================================
   KITT英語 スマホ用ハンバーガーメニュー
   ================================================== */

.kitt-menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  background: #ffffff;
  cursor: pointer;
}

.kitt-menu-toggle__line {
  display: block;
  width: 22px;
  height: 2px;
  margin: 3px 0;
  background: #1f2937;
  border-radius: 2px;
}

@media (max-width: 767px) {
  .kitt-site-header__inner {
    position: relative;
    padding: 12px 18px;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0;
  }

  .kitt-site-brand {
    font-size: 20px;
  }

  .kitt-menu-toggle {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
  }

  .kitt-site-nav {
    display: none;
    width: 100%;
    margin-top: 12px;
    border-top: 1px solid #e2e8f0;
  }

  .kitt-site-nav.is-open {
    display: block;
  }

  .kitt-site-nav__list {
    display: block;
    margin: 0;
    padding: 8px 0 4px;
  }

  .kitt-site-nav__item {
    border-bottom: 1px solid #eef2f7;
  }

  .kitt-site-nav__item:last-child {
    border-bottom: 0;
  }

  .kitt-site-nav__item a {
    display: block;
    padding: 12px 4px;
    font-size: 15px;
  }
}

/* FAQページ：飾り見出し「FAQ」を非表示 */
body.page-id-264 .kitt-eyebrow {
  display: none;
}

/* ==================================================
   KITT Common Color Frame UI v0.3
   適用範囲：Lesson16以降の本文・Step確認・Gate共通UI

   正式版：KITT-APR-2026-L16D3-COLOR-v0.3
   問題UI＝無彩色
   構造青＝Stepヘッダーなど画面構造専用
   水色＝比較・変化・見分け専用
   ================================================== */

:root {
  --kitt-structure-blue-bg: #dce8f5;
  --kitt-structure-blue-border: #315a8a;
  --kitt-structure-blue-text: #173b67;

  --kitt-compare-aqua-bg: #e9f8fb;
  --kitt-compare-aqua-border: #2b8394;

  --kitt-question-bg: #f8f9fa;
  --kitt-question-border: #4b5563;
  --kitt-question-heading: #374151;
}

/* Stepヘッダー：Stepごとの旧4色を、構造青へ統一 */
.step1 .step-header,
.step2 .step-header,
.step3 .step-header,
.step4 .step-header {
  box-sizing: border-box;
  background: var(--kitt-structure-blue-bg);
  border: 2px solid var(--kitt-structure-blue-border);
  color: var(--kitt-structure-blue-text);
}

/* Lesson導入本文の外箱は無彩色にする */
.kitt-lesson-intro {
  background: #ffffff;
  border: 0;
}

/* Day導入帯：Lesson導入の先頭見出しだけを構造青にする */
.kitt-lesson-intro > h2:first-child {
  margin: 0 0 16px;
  padding: 10px 14px;
  background: var(--kitt-structure-blue-bg);
  border: 2px solid var(--kitt-structure-blue-border);
  border-radius: 8px;
  color: var(--kitt-structure-blue-text);
}

/* Step確認：PHP内インラインCSSより詳細度を上げて適用 */
.kitt-step-check.kitt-step-check-two-choice {
  background: var(--kitt-question-bg);
  border: 2px solid var(--kitt-question-border);
}

.kitt-step-check.kitt-step-check-two-choice .kitt-step-check-title {
  color: var(--kitt-question-heading);
  font-weight: 700;
}

/* Gate：1問分の問題カードを無彩色UIへ変更 */
.kitt-gate-card {
  background: var(--kitt-question-bg);
  border: 2px solid var(--kitt-question-border);
  color: var(--kitt-question-heading);
}

.kitt-gate-card .kitt-gate-question {
  color: var(--kitt-question-heading);
  font-weight: 700;
}

/* 比較・変化・見分け：水色へ統一 */
.kitt-box--compare,
.kitt-change-box,
.kitt-compare-box {
  background: var(--kitt-compare-aqua-bg);
  border: 2px solid var(--kitt-compare-aqua-border);
}


/* ==================================================
   KITT Common Color Frame UI v0.3
   fine tuning after visual check
   ヘッダー内側 / 問題枠内側の見え方調整
   ================================================== */

/* Stepヘッダー：
   内側にもう1枚枠が入った見え方を避け、
   構造青の面＋下線で整える */
.step1 .step-header,
.step2 .step-header,
.step3 .step-header,
.step4 .step-header {
  border-top: 0;
  border-left: 0;
  border-right: 0;
  border-bottom: 2px solid var(--kitt-structure-blue-border);
  border-radius: 0;
  background: var(--kitt-structure-blue-bg);
  color: var(--kitt-structure-blue-text);
}

/* 問題カード本体：
   中の余白も含めて無彩色として見えるようにする */
.kitt-step-check.kitt-step-check-two-choice,
.kitt-gate-card {
  background: var(--kitt-question-bg);
}

/* 問題文エリア */
.kitt-step-check.kitt-step-check-two-choice .kitt-step-check-question,
.kitt-gate-card .kitt-gate-question {
  color: var(--kitt-question-heading);
  background: transparent;
}

/* 選択肢：
   Gate内側に残っていた青みを抑え、無彩色UIへ寄せる */
.kitt-gate-choice {
  background: #ffffff;
  border-color: #cbd5e1;
  box-shadow: none;
  color: #1f2937;
}

.kitt-gate-choice:hover,
.kitt-gate-choice:focus {
  background: #ffffff;
  border-color: var(--kitt-question-border);
}

.kitt-gate-choice:disabled {
  background: #f8fafc;
  color: #64748b;
  border-color: #cbd5e1;
}

/* Step確認の選択肢も、通常時は無彩色寄せ */
.kitt-step-check-choice {
  background: #ffffff;
  border-color: #cbd5e1;
  color: #1f2937;
}

/* 正解・不正解表示は既存仕様を優先して維持 */
.kitt-step-check-choice.is-correct {
  border-color: #2f7a3e;
  background: #eaf6ec;
}

.kitt-step-check-choice.is-wrong {
  border-color: #f87171;
  background: #fef2f2;
}


/* Gate問題枠：外枠と内容の間に余白を確保 */
.kitt-gate-card {
  box-sizing: border-box;
  padding: 14px;
  border-radius: 12px;
}

/* 問題番号と問題文の間隔 */
.kitt-gate-progress {
  margin-bottom: 10px;
}

/* ヒント欄の下側に不要な余白を残さない */
.kitt-gate-card .kitt-gate-hint-area {
  margin-bottom: 0;
}

@media (max-width: 640px) {
  .kitt-gate-card {
    padding: 12px;
  }
}


/* ==================================================
   KITT Lesson Intro Neutral Frame Trial
   外枠＝範囲整理。意味色は持たせない。
================================================== */
.kitt-lesson-intro {
  box-sizing: border-box;
  background: #f7f8fa;
  border: 1px solid #d9dde3;
  border-radius: 8px;
  padding: 16px;
  box-shadow: none;
}


/* KITT Gate common hint modal */
body.kitt-gate-modal-open {
  overflow: hidden;
}

.kitt-gate-common-hint-modal {
  position: fixed;
  inset: 0;
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  padding: 16px;
  background: rgba(17, 24, 39, 0.58);
}

.kitt-gate-common-hint-dialog {
  box-sizing: border-box;
  width: min(560px, 100%);
  max-height: calc(100vh - 32px);
  overflow-y: auto;
  padding: 24px;
  background: #ffffff;
  border-radius: 12px;
  box-shadow: 0 16px 40px
    rgba(17, 24, 39, 0.24);
}

.kitt-gate-common-hint-dialog h3 {
  margin: 0 0 18px;
}

.kitt-gate-common-hint-dialog p {
  margin: 14px 0;
}

.kitt-gate-common-hint-dialog ul {
  margin: 10px 0 18px;
  padding-left: 1.5em;
}

.kitt-gate-common-hint-close {
  margin-top: 8px;
}


/* ==================================================
   KITT Gate question image
   ================================================== */

.kitt-gate-image {
  margin: 14px 0 16px;
  text-align: center;
}

.kitt-gate-image img {
  display: block;
  width: 100%;
  max-width: 520px;
  height: auto;
  margin: 0 auto;
  border-radius: 10px;
}

@media (max-width: 640px) {
  .kitt-gate-image {
    margin: 12px 0 14px;
  }

  .kitt-gate-image img {
    max-width: 100%;
  }
}