/* ==========================================================================
   區塊內容樣式 (Block Document Content)
   前台呈現與工作台編輯器所見即所得共用核心樣式
   所有尺寸、色彩、圓角均對接 tokens.css (--ed-*)
   ========================================================================== */

.bk-doc {
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    box-sizing: border-box;
    font-size: var(--ed-content-size, 16.5px);
    line-height: var(--ed-content-line, 1.8);
    font-family: -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
    color: var(--ed-text, #e2e8f0);
    word-break: break-word;
    overflow-wrap: anywhere;
    caret-color: var(--ed-accent, #38bdf8);
}

/* 區塊基本間距 */
.bk-doc > * {
    margin-top: 0;
    margin-bottom: 0.55em;
    box-sizing: border-box;
}

/* 標題字級與樣式 (H1–H6) */
.bk-doc h1 {
    font-size: 2.0em;
    font-weight: 700;
    line-height: 1.3;
    margin-top: 0.2em;
    margin-bottom: 0.6em;
    letter-spacing: -0.01em;
    color: var(--ed-text, #e2e8f0);
}

.bk-doc h2 {
    font-size: 1.6em;
    font-weight: 700;
    line-height: 1.35;
    margin-top: 1.4em;
    margin-bottom: 0.5em;
    border-bottom: 1px solid var(--ed-border, rgba(255, 255, 255, 0.08));
    padding-bottom: 0.3em;
    color: var(--ed-text, #e2e8f0);
}

.bk-doc h3 {
    font-size: 1.3em;
    font-weight: 650;
    line-height: 1.4;
    margin-top: 1.2em;
    margin-bottom: 0.4em;
    color: var(--ed-text, #e2e8f0);
}

.bk-doc h4 {
    font-size: 1.12em;
    font-weight: 650;
    line-height: 1.45;
    margin-top: 1.0em;
    margin-bottom: 0.35em;
    color: var(--ed-text, #e2e8f0);
}

.bk-doc h5 {
    font-size: 1.0em;
    font-weight: 650;
    line-height: 1.5;
    margin-top: 0.9em;
    margin-bottom: 0.3em;
    color: var(--ed-text, #e2e8f0);
}

.bk-doc h6 {
    font-size: 0.9em;
    font-weight: 600;
    line-height: 1.5;
    margin-top: 0.9em;
    margin-bottom: 0.3em;
    color: var(--ed-text-muted, #94a3b8);
    letter-spacing: 0.04em;
}

/* 段落與清單 */
.bk-doc p {
    margin-top: 0;
    margin-bottom: 0.55em;
    min-height: 1.8em;
}

.bk-doc ul,
.bk-doc ol {
    margin-top: 0.2em;
    margin-bottom: 0.55em;
    padding-left: 1.6em;
}

.bk-doc li {
    margin-bottom: 0.25em;
    line-height: 1.75;
}

/* 引用區塊 */
.bk-doc blockquote {
    margin: 0.8em 0;
    padding: 0.6em 1.1em;
    border-left: 3px solid var(--ed-accent, #38bdf8);
    color: var(--ed-text-muted, #94a3b8);
    background: var(--ed-accent-soft, rgba(56, 189, 248, 0.15));
    border-radius: 0 var(--ed-radius-sm, 6px) var(--ed-radius-sm, 6px) 0;
    font-style: normal;
}

/* 分隔線 */
.bk-doc hr {
    border: none;
    border-top: 1px solid var(--ed-border, rgba(255, 255, 255, 0.08));
    margin: 1.6em 0;
    height: 0;
}

/* 行內格式 */
.bk-doc strong {
    font-weight: 700;
    color: inherit;
}

.bk-doc em {
    font-style: italic;
}

.bk-doc u {
    text-decoration: underline;
    text-underline-offset: 3px;
}

.bk-doc s {
    text-decoration: line-through;
    opacity: 0.75;
}

.bk-doc code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.88em;
    padding: 0.18em 0.4em;
    border-radius: var(--ed-radius-sm, 6px);
    background: var(--ed-border, rgba(255, 255, 255, 0.08));
    color: var(--ed-accent, #38bdf8);
    border: 1px solid var(--ed-border, rgba(255, 255, 255, 0.08));
}

.bk-doc mark {
    background: rgba(250, 204, 21, 0.28);
    color: inherit;
    padding: 0.1em 0.25em;
    border-radius: 3px;
}

.bk-doc a {
    color: var(--ed-accent, #38bdf8);
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: color var(--ed-transition, 0.15s cubic-bezier(0.4, 0, 0.2, 1));
}

.bk-doc a:hover {
    color: var(--ed-accent-strong, #00d9ff);
}

/* 響應式手機設定 */
@media (max-width: 768px) {
    .bk-doc {
        font-size: 15.5px;
        line-height: 1.75;
        overflow-x: hidden;
    }

    .bk-doc h1 { font-size: 1.75em; }
    .bk-doc h2 { font-size: 1.45em; }
    .bk-doc h3 { font-size: 1.22em; }
    .bk-doc h4 { font-size: 1.08em; }
}