/* ==========================================================================
   互動衛教共用樣式（2026-10）
   只在 /interactive/ 底下的頁面引用。色彩一律吃 styles.css :root 變數。
   class 一律 ia- 前綴，避免和文章頁（.article-shell、.faq-question、.hero-grid 等）
   被 script.js 或全域 CSS 誤套。
   ========================================================================== */

.ia-page {
    --ia-radius: 14px;
    --ia-border: #e2e8f0;
    --ia-soft: #f1f6fb;
    --ia-accent-soft: #e6f4f4;
    --ia-ok: #276749;
    --ia-ok-soft: #f0fff4;
    --ia-no: #9b2c2c;
    --ia-no-soft: #fff5f5;
    max-width: 860px;
    margin: 0 auto;
    padding: calc(var(--header-height) + 24px) 20px 56px;
}

/* ---------- 麵包屑 ---------- */
.ia-breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: 18px;
}
.ia-breadcrumb a { color: var(--primary-color); text-decoration: none; }
.ia-breadcrumb a:hover { text-decoration: underline; }
.ia-breadcrumb .ia-sep { color: #a0aec0; }

/* ---------- 草稿標記（上線前整段移除） ---------- */
.ia-draft {
    border: 2px dashed var(--warning-color);
    background: #fffaf0;
    color: #7b341e;
    border-radius: 10px;
    padding: 10px 14px;
    font-size: 0.92rem;
    margin-bottom: 18px;
}

/* ---------- 頁首 ---------- */
.ia-hero h1 {
    font-size: clamp(1.6rem, 4.5vw, 2.1rem);
    color: var(--primary-color);
    line-height: 1.35;
    margin-bottom: 10px;
}
.ia-hero p { color: var(--text-color); margin-bottom: 8px; }
.ia-disclaimer {
    font-size: 0.9rem;
    color: #4a5568;
    background: var(--bg-light);
    border-left: 4px solid var(--text-light);
    border-radius: 6px;
    padding: 10px 14px;
    margin-top: 14px;
}

/* ---------- 單元導覽 ---------- */
.ia-modules {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin: 24px 0 14px;
}
.ia-modules a {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-height: 48px;
    padding: 8px 10px;
    border: 1.5px solid var(--ia-border);
    border-radius: 999px;
    background: var(--white);
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.95rem;
    text-align: center;
    text-decoration: none;
    line-height: 1.3;
}
.ia-modules a[aria-current="step"] {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--white);
}
.ia-modules .ia-mod-num {
    display: inline-flex;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    background: var(--ia-soft);
    color: var(--primary-color);
    flex-shrink: 0;
}
.ia-modules a[aria-current="step"] .ia-mod-num { background: rgba(255,255,255,0.2); color: var(--white); }

/* ---------- 進度 ---------- */
.ia-progress {
    display: none;
    margin-bottom: 14px;
    scroll-margin-top: calc(var(--header-height) + 12px);
}
.ia-js .ia-progress { display: block; }
.ia-progress-text {
    font-size: 0.92rem;
    color: var(--text-light);
    margin-bottom: 6px;
}
.ia-progress-text strong { color: var(--primary-color); }
.ia-progress-bar {
    height: 8px;
    border-radius: 999px;
    background: var(--ia-border);
    overflow: hidden;
}
.ia-progress-bar span {
    display: block;
    height: 100%;
    width: 0;
    background: var(--accent-color);
    border-radius: inherit;
}

/* ---------- 步驟 ---------- */
.ia-step {
    background: var(--white);
    border: 1px solid var(--ia-border);
    border-radius: var(--ia-radius);
    box-shadow: 0 2px 12px rgba(0, 51, 102, 0.06);
    padding: 26px 28px;
    margin-bottom: 20px;
    scroll-margin-top: calc(var(--header-height) + 12px);
}
.ia-js .ia-step { display: none; margin-bottom: 0; }
.ia-js .ia-step.is-current { display: block; }

.ia-step-kicker {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-color);
    letter-spacing: 1px;
    margin-bottom: 4px;
}
.ia-step h2 {
    font-size: clamp(1.3rem, 3.6vw, 1.55rem);
    color: var(--primary-color);
    line-height: 1.4;
    margin-bottom: 14px;
}
.ia-step h2:focus { outline: none; }
.ia-step h2:focus-visible { outline: 3px solid var(--accent-color); outline-offset: 4px; border-radius: 4px; }
.ia-step h3 { font-size: 1.08rem; color: var(--primary-color); margin: 18px 0 8px; }
.ia-step p { margin-bottom: 10px; }
.ia-step ul.ia-list { margin: 6px 0 12px 1.2em; }
.ia-step ul.ia-list li { margin-bottom: 6px; }

.ia-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 6px;
    font-size: 0.95rem;
    color: var(--primary-light);
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 3px;
}

/* 重點框 */
.ia-note {
    background: var(--ia-accent-soft);
    border-radius: 10px;
    padding: 12px 16px;
    margin: 12px 0;
}
.ia-warn {
    background: var(--ia-no-soft);
    border: 1.5px solid #feb2b2;
    border-radius: 10px;
    padding: 12px 16px;
    margin: 14px 0;
}
.ia-warn strong { color: var(--danger-color); }

/* ---------- 開始畫面 ---------- */
.ia-start-list {
    list-style: none;
    display: grid;
    gap: 10px;
    margin: 6px 0 20px;
}
.ia-start-list li {
    display: flex;
    gap: 12px;
    align-items: center;
    background: var(--bg-light);
    border-radius: 10px;
    padding: 12px 14px;
}
.ia-start-list .ia-mod-num {
    display: inline-flex;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    color: var(--white);
    font-weight: 700;
    flex-shrink: 0;
}

/* ---------- 按鈕 ---------- */
.ia-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 48px;
    padding: 10px 22px;
    border-radius: 10px;
    border: 2px solid var(--primary-color);
    background: var(--primary-color);
    color: var(--white);
    font: inherit;
    font-weight: 700;
    font-size: 1rem;
    text-decoration: none;
    cursor: pointer;
}
.ia-btn:hover { background: var(--primary-dark); border-color: var(--primary-dark); }
.ia-btn-ghost {
    background: var(--white);
    color: var(--primary-color);
}
.ia-btn-ghost:hover { background: var(--ia-soft); border-color: var(--primary-color); }
.ia-btn-text {
    background: none;
    border-color: transparent;
    color: var(--primary-light);
    padding-left: 10px;
    padding-right: 10px;
    text-decoration: underline;
    text-underline-offset: 3px;
}
.ia-btn-text:hover { background: var(--ia-soft); border-color: transparent; }
.ia-btn[disabled] { opacity: 0.45; cursor: not-allowed; }
/* LINE 綠底白字對比不足（2.25:1），改白底＋LINE 綠框、深綠字 */
.ia-btn-line { background: var(--white); border-color: var(--line-green); color: #04692f; }
.ia-btn-line:hover { background: #effbf3; border-color: var(--line-green); }
.ia-btn-line i { color: var(--line-green); }
.ia-btn-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }

.ia-page button:focus-visible,
.ia-page a:focus-visible {
    outline: 3px solid var(--accent-color);
    outline-offset: 2px;
}

/* ---------- 上一步／下一步 ---------- */
.ia-nav {
    display: none;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-top: 14px;
}
.ia-js .ia-nav { display: flex; }
.ia-nav .ia-nav-main { display: flex; gap: 10px; margin-left: auto; }

/* ---------- 選擇面板（胃部圖解、檢查方式） ---------- */
.ia-choice-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 12px 0;
}
.ia-choice-buttons button {
    min-height: 44px;
    padding: 8px 14px;
    border-radius: 999px;
    border: 1.5px solid var(--ia-border);
    background: var(--white);
    color: var(--primary-color);
    font: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
}
.ia-choice-buttons button[aria-pressed="true"] {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: var(--white);
}
.ia-panel {
    background: var(--bg-light);
    border-radius: 10px;
    padding: 14px 16px;
    margin-top: 6px;
}
.ia-panel h3 { margin-top: 0; }
.ia-js .ia-panel { display: none; }
.ia-js .ia-panel.is-active { display: block; }

/* 胃部圖解 */
.ia-figure { margin: 8px 0 4px; }
.ia-figure svg { display: block; width: 100%; max-width: 440px; height: auto; margin: 0 auto; }
.ia-figure figcaption { font-size: 0.85rem; color: var(--text-light); text-align: center; margin-top: 4px; }
.ia-part { cursor: pointer; }
.ia-part .ia-hl { opacity: 0; }
.ia-part.is-active .ia-hl { opacity: 1; }
.ia-bugs { opacity: 0.35; }
.ia-figure.show-bugs .ia-bugs { opacity: 1; }
.ia-figure text { font-family: var(--font-main); font-size: 17px; font-weight: 700; fill: var(--primary-color); }

/* ---------- 疾病流程 ---------- */
.ia-flow {
    list-style: none;
    display: grid;
    gap: 10px;
    margin: 12px 0;
    counter-reset: flow;
}
.ia-flow li {
    position: relative;
    background: var(--bg-light);
    border-radius: 10px;
    padding: 12px 14px 12px 52px;
}
.ia-flow li::before {
    counter-increment: flow;
    content: counter(flow);
    position: absolute;
    left: 14px;
    top: 12px;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--white);
    font-size: 0.85rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ---------- 翻卡（迷思）與展開問答 ---------- */
.ia-cards { display: grid; gap: 10px; margin-top: 10px; }
.ia-reveal {
    border: 1.5px solid var(--ia-border);
    border-radius: 12px;
    background: var(--white);
    overflow: hidden;
}
.ia-reveal > button {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    min-height: 52px;
    padding: 12px 16px;
    background: none;
    border: 0;
    font: inherit;
    font-weight: 600;
    color: var(--primary-color);
    text-align: left;
    cursor: pointer;
}
.ia-reveal > button .ia-reveal-hint {
    flex-shrink: 0;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-color);
}
.ia-reveal > button[aria-expanded="true"] { background: var(--ia-soft); }
.ia-reveal-body { padding: 12px 16px 14px; border-top: 1px solid var(--ia-border); }
.ia-reveal-body p:last-child { margin-bottom: 0; }
.ia-verdict { font-weight: 700; color: var(--accent-color); }

/* ---------- 檢查前準備清單 ---------- */
.ia-checklist { list-style: none; display: grid; gap: 10px; margin: 10px 0; }
.ia-checklist li {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 12px;
    align-items: start;
    background: var(--bg-light);
    border-radius: 10px;
    padding: 12px 14px;
}
.ia-checklist .ia-when {
    min-width: 76px;
    padding: 4px 8px;
    border-radius: 8px;
    background: var(--primary-color);
    color: var(--white);
    font-size: 0.85rem;
    font-weight: 700;
    text-align: center;
}

/* ---------- 測驗 ---------- */
.ia-quiz-count { font-size: 0.92rem; color: var(--text-light); margin-bottom: 6px; }
.ia-quiz-q { font-size: 1.12rem; font-weight: 700; color: var(--text-color); margin-bottom: 12px; }
.ia-quiz-options { display: grid; gap: 10px; }
.ia-quiz-options button {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    min-height: 52px;
    padding: 10px 16px;
    border-radius: 10px;
    border: 2px solid var(--ia-border);
    background: var(--white);
    color: var(--text-color);
    font: inherit;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
}
.ia-quiz-options button:hover:not([disabled]) { border-color: var(--primary-light); }
.ia-quiz-options button[disabled] { cursor: default; }
.ia-quiz-options button.is-correct { border-color: var(--ia-ok); background: var(--ia-ok-soft); }
.ia-quiz-options button.is-wrong { border-color: var(--ia-no); background: var(--ia-no-soft); }
.ia-quiz-tag { font-size: 0.85rem; font-weight: 700; flex-shrink: 0; }
.is-correct .ia-quiz-tag { color: var(--ia-ok); }
.is-wrong .ia-quiz-tag { color: var(--ia-no); }
.ia-quiz-feedback {
    margin-top: 14px;
    padding: 12px 16px;
    border-radius: 10px;
    background: var(--bg-light);
}
.ia-quiz-feedback:focus { outline: none; }
.ia-quiz-feedback:focus-visible { outline: 3px solid var(--accent-color); }
.ia-quiz-feedback strong { display: block; margin-bottom: 4px; }
.ia-quiz-feedback.is-ok strong { color: var(--ia-ok); }
.ia-quiz-feedback.is-no strong { color: var(--ia-no); }
.ia-quiz-done { text-align: center; padding: 10px 0; }

/* ---------- 摘要 ---------- */
.ia-summary-list { list-style: none; display: grid; gap: 10px; margin: 12px 0; counter-reset: sum; }
.ia-summary-list li {
    position: relative;
    padding: 12px 14px 12px 50px;
    border-radius: 10px;
    background: var(--ia-accent-soft);
}
.ia-summary-list li::before {
    counter-increment: sum;
    content: counter(sum);
    position: absolute;
    left: 14px;
    top: 12px;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--accent-color);
    color: var(--white);
    font-weight: 700;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    justify-content: center;
}
.ia-print-only { display: none; }

/* ---------- 手機 ---------- */
@media (max-width: 640px) {
    .ia-page { padding-left: 16px; padding-right: 16px; }
    .ia-step { padding: 20px 18px; }
    .ia-modules { gap: 6px; }
    .ia-modules a { font-size: 0.85rem; padding: 6px; flex-direction: column; gap: 2px; border-radius: 12px; }
    .ia-nav { flex-wrap: wrap; }
    .ia-nav .ia-nav-main { width: 100%; }
    .ia-nav .ia-nav-main .ia-btn { flex: 1; }
    .ia-btn-row .ia-btn { flex: 1 1 100%; }
}

/* ---------- 動態效果：只在使用者未要求減少動態時啟用 ---------- */
@media (prefers-reduced-motion: no-preference) {
    .ia-js .ia-step.is-current { animation: ia-fade 0.25s ease-out; }
    .ia-progress-bar span { transition: width 0.3s ease; }
    .ia-part .ia-hl, .ia-bugs { transition: opacity 0.2s ease; }
    @keyframes ia-fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
}

/* ---------- 列印：只印重點摘要 ---------- */
@media print {
    header, footer, .mobile-cta-bar, .article-fab, .skip-link,
    .ia-breadcrumb, .ia-draft, .ia-hero, .ia-modules, .ia-progress, .ia-nav,
    .ia-step, .ia-no-print { display: none !important; }
    body { padding: 0 !important; background: #fff; font-size: 12pt; }
    .ia-page { padding: 0; max-width: none; }
    .ia-js .ia-step.ia-summary-step,
    .ia-step.ia-summary-step { display: block !important; border: 0; box-shadow: none; padding: 0; animation: none; }
    .ia-summary-list li { background: none; border: 1px solid #cbd5e0; }
    .ia-print-only { display: block; }
}