/* 主菜单外壳样式（外置，类比 theme-eras.css，构建不合并进主 CSS）
   仅包含 #screen-menu 相关规则；CSS 变量（:root 中的 --orange/--bg-card/--border 等）
   定义于主内联 <style>，此处直接复用。menu.css 始终随主 HTML 加载，全局生效。
   级联顺序：主内联 <style> → menu.css → theme-eras.css（主题/时代层最后加载以覆盖）。 */
.navbar{display:flex;align-items:center;justify-content:center;padding:12px 18px 8px;position:sticky;top:0;z-index:50;background:rgba(250,245,235,0.97)}
.nav-logo{font-family:var(--font-display);font-size:clamp(17px,4.5vw,22px);font-weight:700;color:var(--text);letter-spacing:1px}
.nav-logo .hl{color:var(--orange);font-size:1.1em}.nav-pos-toggle,.nav-pos-btn{display:none}

.hero{text-align:center;padding:min(3vh,22px) 20px 10px;position:relative}
.hero::after{content:'';position:absolute;top:-60px;left:50%;transform:translateX(-50%);width:200px;height:200px;background:radial-gradient(circle,rgba(255,107,53,0.06)0%,transparent 70%);pointer-events:none}
.hero-title{font-family:var(--font-display);font-size:clamp(11px,3vw,14px);color:var(--orange);font-weight:700;letter-spacing:3px;margin-bottom:6px;text-transform:uppercase}
.hero-headline{font-size:clamp(32px,8vw,48px);font-weight:700;line-height:1.1;font-family:var(--font-display);color:var(--text)}
.hero-headline .hl{color:var(--orange)}
.hero-desc{font-size:clamp(13px,3.5vw,16px);color:var(--text-dim);margin-top:10px;line-height:1.5;max-width:320px;margin-left:auto;margin-right:auto}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:9px;padding:8px 13px 10px;align-items:stretch}
#draft-mode-host{padding:10px 14px 6px;margin-top:2px;border-top:1px solid var(--border-light)}
#draft-mode-host.locked{opacity:.42;filter:grayscale(.2);pointer-events:none;user-select:none}
#draft-mode-host.locked .draft-mode-title{color:var(--text-muted)!important}
.feature-card .fc-title{font-size:20px}
.feature-card .fc-sub{font-size:12px}
.feature-card{background:var(--bg-card);border:2px solid var(--border);border-radius:var(--radius);padding:14px 11px 12px;cursor:pointer;transition:all .15s;position:relative}
.feature-card:active{transform:scale(0.97)}.feature-card.selected{border-color:var(--orange);background:var(--orange-bg)}
.feature-card.disabled-card{opacity:.7;filter:grayscale(.3);cursor:default;pointer-events:none;border-style:dashed!important}
.feature-card.mode-muted{opacity:.55;filter:grayscale(.35)}
.feature-card.mode-muted .fc-btn,.feature-card.mode-muted #continue-activity-btn{background:#8aa0b5!important;box-shadow:0 4px 0 #6b7d8f!important;color:#fff}
.feature-card .fc-tag{display:inline-block;font-family:var(--font-display);font-size:12px;font-weight:600;padding:3px 11px;border-radius:20px;margin-bottom:8px}
.feature-card .fc-tag.gold{background:var(--orange-dim);color:var(--orange)}.feature-card .fc-tag.new{background:rgba(46,196,182,0.12);color:var(--green)}
.feature-card .fc-title{font-family:var(--font-display);font-size:18px;font-weight:700;margin-bottom:5px;line-height:1.2}
.feature-card .fc-sub{font-size:12px;color:var(--text-dim);margin-bottom:9px;line-height:1.45;min-height:3.3em}
.era-year-label{font-size:10px;font-weight:800;letter-spacing:.15px;white-space:nowrap}
.era-copy-label{font-size:10px;font-weight:400;color:var(--text-dim);margin-top:3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.feature-card .fc-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:11px 20px;background:var(--orange);color:#fff;border:none;border-radius:12px;font-family:var(--font-display);font-size:15px;font-weight:600;cursor:pointer;transition:all .1s;width:100%;box-shadow:0 4px 0 var(--orange-deep),0 6px 12px rgba(255,107,53,0.25)}
.feature-card .fc-btn:active{transform:translateY(3px);box-shadow:0 1px 0 var(--orange-deep),0 3px 8px rgba(255,107,53,0.2)}
.feature-card .fc-btn:disabled{opacity:.4;box-shadow:none;transform:none}
.fc-footer{margin-top:8px;font-size:12px;color:var(--text-muted);text-align:center}

.debug-btn{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;text-align:center;margin-top:12px}
.debug-btn button{background:var(--bg-card);border:none;color:var(--text-dim);padding:10px 18px;border-radius:12px;font-family:var(--font-display);font-size:12px;cursor:pointer}
.btn-help{display:inline-flex;align-items:center;justify-content:center;gap:6px;background:var(--bg-card);color:var(--text);border:2px solid var(--border);padding:10px 14px;border-radius:12px;font-family:var(--font-display);font-size:13px;cursor:pointer;font-weight:600;box-shadow:0 3px 0 var(--border);transition:all .1s ease;position:relative;top:0;min-height:40px}
.btn-help:hover{border-color:var(--orange);color:var(--orange)}
.btn-help:active{transform:translateY(2px);box-shadow:0 1px 0 var(--border)}