/* ================================================================
 *  Letters Font — Neumorphic Design System
 *  对齐前端模板 design tokens | 新拟态 + 极光 + 动画网格 + Spotlight
 *  ================================================================ */

/* ===== Design Tokens ===== */
:root {
    --tw-ring-color: rgba(249,115,22,0.5);
    --background: #f8fafc;
    --foreground: #374151;
    --card: #ffffff;
    --card-foreground: #1f2937;
    --primary: #374151;
    --primary-foreground: #ffffff;
    --secondary: #f97316;
    --secondary-foreground: #ffffff;
    --muted: #f0f4f8;
    --muted-foreground: #6b7280;
    --accent: #f97316;
    --accent-foreground: #ffffff;
    --destructive: #b91c1c;
    --destructive-foreground: #ffffff;
    --border: #e5e7eb;
    --input: #ffffff;
    --ring: rgba(249,115,22,0.5);
    --radius: 0.75rem;
    --font-heading: 'Space Grotesk','Sora',system-ui,sans-serif;
    --font-body: 'DM Sans','Inter',system-ui,-apple-system,sans-serif;
    --brand: #f97316;
    --brand-light: #fb923c;
    --brand-dark: #ea580c;
    --shadow-neumorphic: 8px 8px 16px rgba(163,177,198,0.15),-8px -8px 16px rgba(255,255,255,0.7);
    --shadow-neumorphic-inset: inset 4px 4px 8px rgba(163,177,198,0.15),inset -4px -4px 8px rgba(255,255,255,0.7);
    --shadow-card: 0 1px 3px rgba(0,0,0,0.04);
    --shadow-card-hover: 12px 12px 24px rgba(163,177,198,0.2),-12px -12px 24px rgba(255,255,255,0.8);
    --px-margin-mobile: 1rem;
    --px-margin-desktop: 2rem;
    --transition-fast: 150ms;
    --transition-normal: 300ms;
}

.dark {
    --background: #1a1a1a;
    --foreground: #f1f5f9;
    --card: #2a2a2a;
    --card-foreground: #f1f5f9;
    --primary: #f1f5f9;
    --primary-foreground: #1a1a1a;
    --secondary: #ea580c;
    --secondary-foreground: #f8fafc;
    --muted: #262626;
    --muted-foreground: #a3a3a3;
    --accent: #ea580c;
    --accent-foreground: #f8fafc;
    --destructive: #dc2626;
    --destructive-foreground: #f8fafc;
    --border: #404040;
    --input: #2a2a2a;
    --ring: rgba(249,115,22,0.5);
    --shadow-neumorphic: 8px 8px 16px rgba(0,0,0,0.3),-8px -8px 16px rgba(255,255,255,0.03);
    --shadow-neumorphic-inset: inset 4px 4px 8px rgba(0,0,0,0.3),inset -4px -4px 8px rgba(255,255,255,0.03);
    --shadow-card: 0 1px 3px rgba(0,0,0,0.2);
    --shadow-card-hover: 12px 12px 24px rgba(0,0,0,0.4),-12px -12px 24px rgba(255,255,255,0.05);
}

/* ===== Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box}
html{font-size:110%;scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font-body);background:var(--background);color:var(--foreground);min-height:100vh;display:flex;flex-direction:column;transition:background var(--transition-normal),color var(--transition-normal);line-height:1.6;overflow-x:hidden}
a{color:var(--accent);text-decoration:none;transition:color var(--transition-fast)}
a:hover{color:var(--brand-dark)}

/* ===== HEADER ===== */
.header-brand{display:flex;align-items:center;gap:0.5rem;text-decoration:none;color:var(--foreground)}
.header-brand-icon{width:28px;height:28px;object-fit:contain}
.header-brand-name{font-size:1.9rem}
@media(max-width:640px){.header-brand-name{font-size:1.35rem}}
.header-brand span{font-size:1.25rem;font-weight:700;color:var(--brand);letter-spacing:-0.02em;font-family:var(--font-heading)}

.header-row{display:flex;align-items:center;justify-content:space-between;width:100%;padding:0.75rem 1rem;max-width:72rem;margin:0 auto}
.hamburger-btn{display:none;color:var(--muted-foreground);background:none;border:none;cursor:pointer;font-size:1.5rem}
.header-nav{display:flex;align-items:center;gap:1.5rem;margin-left:auto}
@media(max-width:768px){.hamburger-btn{display:block}.header-nav{display:none}.header-brand{position:absolute;left:50%;transform:translateX(-50%)}}
.theme-toggle-btn{display:flex;align-items:center;justify-content:center;width:2.25rem;height:2.25rem;border:none;background:transparent;color:var(--muted-foreground);cursor:pointer;transition:all var(--transition-fast);margin-left:0.5rem}
.theme-icon-light{display:block}.dark .theme-icon-light{display:none}
.theme-icon-dark{display:none}.dark .theme-icon-dark{display:block}
.theme-toggle-btn:hover{color:var(--accent)}

/* ===== HERO / AURORA ===== */
.hero-section{position:relative;text-align:center;padding:5rem 1rem 4rem;margin-bottom:3rem;overflow:hidden}
.aurora-bg{position:absolute;inset:0;z-index:0;pointer-events:none;opacity:0.5}
.aurora-bg::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(249,115,22,0.10) 0%,rgba(234,88,12,0.05) 33%,rgba(249,115,22,0.10) 66%,rgba(234,88,12,0.05) 100%);background-size:400% 400%;animation:aurora 8s ease-in-out infinite}
@keyframes aurora{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}

/* ===== FLOATING PARTICLES ===== */
.p-particle{will-change:transform;opacity:0;filter:drop-shadow(0 0 6px currentColor)}
@keyframes p-fall{0%{transform:translateY(0) rotate(0deg) scale(0.6);opacity:0}8%{opacity:1}85%{opacity:1}100%{transform:translateY(112vh) rotate(360deg) scale(1);opacity:0}}
@media(prefers-reduced-motion:reduce){.p-particle{display:none}}

.hero-content{position:relative;z-index:1}
.hero-title{font-family:var(--font-heading);font-size:clamp(2.5rem,6vw,4rem);font-weight:700;line-height:1.1;color:var(--foreground);margin:0 0 0.75rem;letter-spacing:-0.03em}
.hero-subtitle{font-size:1.125rem;color:var(--muted-foreground);max-width:36rem;margin:0 auto;line-height:1.6}

.gradient-text{background:linear-gradient(135deg,#f97316 0%,#fb923c 50%,#fbbf24 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

/* ===== PIS TESTER — QUIZ STYLES ===== */
/* ===== View System ===== */
.quiz-view{opacity:1;transition:opacity 0.25s ease}
.quiz-view.hidden{display:none}

/* ===== Landing ===== */
.quiz-section-title{font-family:var(--font-heading);font-size:1.75rem;font-weight:700;color:var(--foreground);text-align:center;margin:0 0 2rem;padding-top:1.5rem}
/* How It Works — 分享栏下方内联水平排列（图标左 | 文字右，垂直居中） */
.quiz-how-cards{margin-bottom:2rem}
.quiz-how-inline{display:flex;flex-direction:row;gap:1.25rem;justify-content:center;flex-wrap:wrap}
.quiz-work-card-inline{display:flex;align-items:center;gap:1rem;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem 1.5rem;box-shadow:var(--shadow-neumorphic);transition:all var(--transition-normal);flex:1;min-width:250px;max-width:380px}
.quiz-work-card-inline:hover{box-shadow:var(--shadow-card-hover);border-color:var(--accent);transform:translateY(-2px)}
.quiz-work-icon-inline{font-size:2.25rem;flex-shrink:0;line-height:1}
.quiz-work-body{display:flex;flex-direction:column;gap:0.25rem}
.quiz-work-title-inline{font-family:var(--font-heading);font-size:1.05rem;font-weight:700;color:var(--foreground);margin:0}
.quiz-work-text-inline{font-size:0.85rem;color:var(--muted-foreground);line-height:1.4;margin:0}

.quiz-name-input-section{max-width:28rem;margin:2rem auto 3rem}
.quiz-input-wrapper{position:relative;margin-bottom:1.25rem}
.quiz-input{width:100%;padding:0.9rem 1.2rem;font-size:1.05rem;background:var(--card);border:1.5px solid var(--border);border-radius:100px;color:var(--foreground);font-family:var(--font-body);outline:none;box-shadow:var(--shadow-neumorphic-inset);transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}
.quiz-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--ring)}
.quiz-input::placeholder{color:var(--muted-foreground);opacity:0.55}
.quiz-char-counter{position:absolute;right:1rem;top:50%;transform:translateY(-50%);font-size:0.75rem;color:var(--muted-foreground);pointer-events:none}

/* ===== Buttons ===== */
.quiz-btn-primary{display:flex;align-items:center;justify-content:center;gap:0.4rem;width:100%;max-width:28rem;margin:0 auto;padding:0.9rem 1.5rem;border:none;border-radius:100px;font-size:1rem;font-weight:700;font-family:var(--font-heading);color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand-dark));cursor:pointer;transition:all var(--transition-fast);box-shadow:0 4px 16px rgba(249,115,22,0.3)}
.quiz-btn-primary svg{flex-shrink:0;vertical-align:middle}
.quiz-btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(249,115,22,0.4)}
.quiz-btn-primary:active{transform:translateY(0)}
.quiz-btn-primary:disabled{opacity:0.7;cursor:not-allowed;transform:none}
.quiz-btn-secondary{display:inline-flex;align-items:center;justify-content:center;gap:0.4rem;width:100%;max-width:28rem;margin:0 auto;padding:0.8rem 1.5rem;border:1.5px solid var(--border);border-radius:100px;font-size:0.95rem;font-weight:700;font-family:var(--font-body);background:var(--card);color:var(--foreground);cursor:pointer;transition:all var(--transition-fast)}
.quiz-btn-secondary svg{flex-shrink:0;vertical-align:middle}
.quiz-btn-secondary:hover{background:var(--muted);border-color:var(--accent)}
.quiz-btn-destructive{display:inline-flex;align-items:center;justify-content:center;gap:0.4rem;width:100%;max-width:28rem;margin:0 auto;padding:0.8rem 1.5rem;border:1.5px solid var(--destructive);border-radius:100px;font-size:0.95rem;font-weight:600;font-family:var(--font-body);background:transparent;color:var(--destructive);cursor:pointer;transition:all var(--transition-fast)}
.quiz-btn-destructive svg{flex-shrink:0;vertical-align:middle}
.quiz-btn-destructive:hover{background:var(--destructive);color:var(--destructive-foreground)}

/* ===== Create ===== */
.quiz-create-header{text-align:center;margin-bottom:2rem}
.quiz-page-title{font-family:var(--font-heading);font-size:2rem;font-weight:700;color:var(--foreground);margin:0 0 0.5rem;text-align:center}
.quiz-page-subtitle{font-size:1rem;color:var(--muted-foreground);text-align:center;max-width:30rem;margin:0 auto}
.quiz-questions-list{display:flex;flex-direction:column;gap:1.25rem;margin-bottom:2rem;max-width:40rem;margin-left:auto;margin-right:auto}
.quiz-question-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem 1.5rem;box-shadow:var(--shadow-neumorphic);overflow:visible!important;height:auto!important}
.quiz-question-item .quiz-question-text{font-size:1.05rem;line-height:1.5;color:var(--foreground);margin:0 0 0.25rem;min-height:3.15rem;white-space:normal;word-break:break-word}
.quiz-question-card .quiz-question-text{display:block;font-size:1.1rem;line-height:1.65;font-weight:600;color:var(--foreground);margin:0 0 1.5rem;overflow:visible!important}
.quiz-options-container{display:flex;flex-direction:column;gap:0.6rem;margin:0}
.quiz-option-btn{display:block;width:100%;padding:0.75rem 1rem;text-align:left;font-size:0.95rem;background:var(--muted);border:1.5px solid var(--border);border-radius:0.6rem;color:var(--foreground);font-family:var(--font-body);cursor:pointer;transition:all var(--transition-fast)}
.quiz-option-btn:hover{border-color:var(--accent);background:var(--card);transform:translateX(2px)}
.quiz-option-btn.selected{background:var(--accent);color:var(--accent-foreground);border-color:var(--accent);font-weight:600}

/* ===== Success ===== */
.quiz-success-header{text-align:center;margin-bottom:2rem}
.quiz-live-badge{display:inline-block;padding:0.3rem 1rem;background:linear-gradient(135deg,#22c55e,#10b981);color:#fff;border-radius:100px;font-size:0.85rem;font-weight:700;letter-spacing:0.05em;margin:0.5rem 0;animation:quiz-pulse-badge 2s ease-in-out infinite}
@keyframes quiz-pulse-badge{0%,100%{opacity:1}50%{opacity:0.7}}
.quiz-link-card{max-width:28rem;margin:0 auto 1.5rem}
.quiz-link-header{display:flex;align-items:center;gap:0.5rem;margin-bottom:1rem}
.quiz-link-icon{font-size:1.5rem}
.quiz-link-display{padding:0.8rem 1rem;background:var(--muted);border:1.5px solid var(--border);border-radius:0.5rem;font-size:0.9rem;color:var(--muted-foreground);text-align:center;font-family:monospace;margin-bottom:0.75rem;word-break:break-all}
.quiz-social-buttons{display:flex;flex-wrap:wrap;gap:0.5rem;margin-top:0.75rem}
.quiz-social-btn{display:inline-flex;align-items:center;padding:0.5rem 0.85rem;border:1px solid var(--border);border-radius:100px;font-size:0.8rem;font-weight:600;background:var(--card);color:var(--foreground);cursor:pointer;transition:all var(--transition-fast)}
.quiz-social-btn:hover{background:var(--accent);color:var(--accent-foreground);border-color:var(--accent)}

/* ===== Subsection title (Leaderboard / Tier List) ===== */
.quiz-section-block{margin-bottom:1.5rem}
.quiz-section-subtitle{font-family:var(--font-heading);font-size:1.15rem;font-weight:700;color:var(--foreground);margin:0 0 1rem;text-align:center}

.quiz-leaderboard{max-width:32rem;margin:0 auto}
.quiz-leaderboard-subtitle,.quiz-leaderboard-title{text-align:center;font-size:0.95rem;color:var(--muted-foreground);margin:0.5rem 0 1rem}
.quiz-leaderboard-body{display:flex;flex-direction:column}
.quiz-leaderboard-row{display:flex;align-items:center;gap:0;padding:0.75rem 0;border-bottom:1px solid var(--border)}.quiz-lb-rank{font-weight:700;min-width:3rem;text-align:center;flex-shrink:0}.quiz-lb-name{flex:1;font-weight:600;text-align:center;padding:0 0.5rem}.quiz-lb-score{font-weight:700;min-width:3.5rem;text-align:right;flex-shrink:0}.quiz-lb-tier{font-size:0.75rem;color:var(--muted-foreground);min-width:4rem;text-align:right;padding-right:0.5rem;flex-shrink:0}.quiz-del-row-btn{flex-shrink:0;background:none;border:none;color:var(--destructive);cursor:pointer;font-size:1.1rem;line-height:1;padding:0 0.25rem}

.quiz-tier-map{max-width:32rem;margin:0 auto 1.5rem}
.quiz-tier-row{display:flex;align-items:center;gap:0;padding:0.6rem 0;margin-bottom:0.35rem;border-left:4px solid;border-radius:0 0.5rem 0.5rem 0;background:var(--card);overflow:hidden;transition:transform var(--transition-fast)}.quiz-tier-row:hover{transform:translateX(3px)}.quiz-tier-label{display:flex;flex-direction:column;align-items:center;gap:0.15rem;padding:0.4rem 0.75rem;width:6.5rem;min-width:6.5rem;flex-shrink:0}.quiz-tier-head{display:flex;align-items:center;gap:0.35rem}.quiz-tier-icon{width:20px;height:20px;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}.quiz-tier-letter{font-weight:900;font-size:1.2rem;color:var(--foreground);line-height:1}.quiz-tier-sub{font-size:0.6rem;color:var(--muted-foreground);text-transform:uppercase;letter-spacing:0.05em;text-align:center;line-height:1.2;white-space:nowrap}.quiz-tier-divider{width:1px;height:2.5rem;background:var(--border);margin:0 0.6rem;flex-shrink:0}.quiz-tier-names{flex:1;display:flex;align-items:center;font-size:0.85rem;color:var(--foreground);padding:0.25rem 0.5rem 0.25rem 0}.quiz-tier-empty{color:var(--muted-foreground);font-style:italic;font-size:0.8rem}.tier-s{border-left-color:#FFD700!important}.tier-a{border-left-color:#10b981!important}.tier-b{border-left-color:#f97316!important}
.tier-c{border-left-color:#f59e0b!important}.tier-d{border-left-color:#ef4444!important}.tier-f{border-left-color:#6b7280!important}

/* ===== Questions (Answer View) ===== */
.quiz-answer-title{font-family:var(--font-heading);font-size:1.5rem;font-weight:700;color:var(--foreground);text-align:center;margin:0 0 1.25rem;line-height:1.3}
.quiz-progress-bar{width:100%;max-width:32rem;height:0.5rem;background:var(--muted);border-radius:100px;overflow:hidden;margin:0 auto 1rem;border:1px solid var(--border)}
.quiz-progress-fill{height:100%;background:linear-gradient(90deg,var(--brand),var(--brand-light));border-radius:100px;transition:width 0.3s ease}
.quiz-question-counter{text-align:center;font-size:0.9rem;color:var(--muted-foreground);font-weight:600;margin-bottom:1rem}
.quiz-question-card{display:block;width:36rem;max-width:100%;margin:0 auto;padding:2rem 1.75rem;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-neumorphic);overflow:visible!important}

/* ===== Score ===== */
.quiz-score-container{max-width:32rem;margin:0 auto;text-align:center}
.quiz-score-card{padding:2rem 1.5rem}
.quiz-score-tag{font-family:var(--font-heading);font-size:1.5rem;font-weight:700;margin:0 0 1.5rem;text-transform:uppercase;letter-spacing:0.05em}
.quiz-circular-meter{position:relative;width:200px;height:200px;margin:0 auto 1.5rem}
.quiz-progress-ring{display:block}
.quiz-ring-bg{stroke:var(--muted)}
.quiz-ring-fill{stroke:var(--brand);transition:stroke-dashoffset 1.5s ease-out}
.quiz-meter-content{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.quiz-meter-number{font-family:var(--font-heading);font-size:3rem;font-weight:700;color:var(--foreground);line-height:1}
.quiz-meter-label{font-size:1rem;color:var(--muted-foreground);margin-top:0.25rem}
.quiz-score-text{font-size:1.1rem;color:var(--foreground);font-weight:600;margin:0.5rem 0}
.quiz-score-message{font-size:0.95rem;color:var(--muted-foreground);font-style:italic;margin:0.5rem 0;line-height:1.5}
.quiz-leaderboard-name{font-weight:700}

/* ===== Loading ===== */
.quiz-loading-spinner{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:4rem 1rem}
.quiz-spinner{width:2.5rem;height:2.5rem;border:3px solid var(--muted);border-top-color:var(--accent);border-radius:50%;animation:quiz-spin 0.8s linear infinite}
@keyframes quiz-spin{to{transform:rotate(360deg)}}
.quiz-loading-text{font-size:1rem;color:var(--muted-foreground);margin-top:1rem}

/* ===== Error ===== */
.quiz-error-message{font-size:1.1rem;color:var(--destructive);font-weight:600;padding:1rem}

/* ===== Toast ===== */
.quiz-toast{position:fixed;bottom:2rem;left:50%;transform:translateX(-50%)translateY(100px);background:var(--card);color:var(--foreground);border:1px solid var(--border);padding:0.75rem 1.5rem;border-radius:100px;font-size:0.9rem;font-weight:600;box-shadow:var(--shadow-card-hover);z-index:9999;opacity:0;transition:all .3s cubic-bezier(.68,-.55,.265,1.55);pointer-events:none;white-space:nowrap}
.quiz-toast.show{opacity:1;transform:translateX(-50%)translateY(0)}

/* ===== No attempts message ===== */
.no-attempts-message{text-align:center;padding:2rem;color:var(--muted-foreground)}

/* ===== Tier row (for tier map) ===== */
.quiz-tier-row{transition:transform var(--transition-fast)}
.quiz-tier-row:hover{transform:translateX(3px)}

/* ===== Responsive ===== */
@media(max-width:640px){
    .quiz-how-grid{grid-template-columns:1fr}
    .quiz-page-title{font-size:1.5rem}
    .quiz-social-buttons{justify-content:center}
    .quiz-option-btn{font-size:0.9rem;padding:0.65rem 0.85rem}
    .quiz-circular-meter{width:160px;height:160px}
    .quiz-meter-number{font-size:2.4rem}
}

/* ===== SECTION TITLE ===== */
.section-title{font-family:var(--font-heading);font-size:1.1rem;font-weight:700;color:var(--foreground);padding:1rem 0 0.5rem;margin:0;grid-column:1/-1;border-bottom:2px solid var(--border);display:flex;align-items:center;gap:0.4rem}
.section-title svg{flex-shrink:0}
.section-title:first-child{padding-top:0}

/* ===== FONT GRID (single column) ===== */
.font-grid{display:grid;grid-template-columns:1fr;gap:1.375rem;padding-bottom:2rem}

.font-card{position:relative;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1rem;display:flex;flex-direction:column;gap:0.5rem;transition:all var(--transition-normal);box-shadow:var(--shadow-neumorphic);overflow:hidden}
.font-card::before{content:'';position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(249,115,22,0.06),transparent);transition:left 0.5s ease;pointer-events:none}
.font-card:hover::before{left:100%}
.font-card:hover{box-shadow:var(--shadow-card-hover);border-color:var(--accent);transform:translateY(-2px)}

.font-preview{font-size:1.15rem;line-height:1.4;color:var(--foreground);word-break:break-all;min-height:2.5rem;padding:0.5rem;background:var(--muted);border-radius:0.5rem;transition:font-size var(--transition-fast);box-shadow:var(--shadow-neumorphic-inset)}

.card-wrapper{display:flex;flex-direction:column}
.card-badge{font-size:1.3rem;font-weight:600;color:var(--muted-foreground);font-family:var(--font-heading);margin-bottom:0;padding-left:0.15rem;line-height:1.2}
.card-badge::before{content:'· ';opacity:0.5}
.font-actions{display:flex;gap:0.25rem;align-self:flex-end}

.btn-icon{display:flex;align-items:center;justify-content:center;width:2rem;height:2rem;border-radius:0.5rem;border:1px solid var(--border);background:var(--card);color:var(--muted-foreground);cursor:pointer;font-size:0.9rem;transition:all var(--transition-fast);box-shadow:var(--shadow-neumorphic)}
.btn-icon:hover{background:var(--muted);color:var(--foreground);border-color:var(--accent);box-shadow:var(--shadow-neumorphic-inset)}
.btn-icon.faved{color:var(--accent-foreground);border-color:var(--accent);background:var(--accent)}.dark .btn-icon.faved{color:var(--accent-foreground);border-color:var(--accent);background:var(--accent)}

.btn-copy{background:var(--accent);color:var(--accent-foreground);border-color:var(--accent);font-size:0.75rem;font-weight:600;padding:0.35rem 0.75rem;border-radius:0.5rem;border:none;cursor:pointer;transition:all var(--transition-fast);white-space:nowrap;box-shadow:var(--shadow-neumorphic)}
.btn-copy:hover{background:var(--brand-dark);transform:scale(1.03);box-shadow:var(--shadow-card-hover)}
.btn-copy.copied{background:#22c55e}

.font-grid-empty{grid-column:1/-1;text-align:center;padding:3rem 1rem;color:var(--muted-foreground);font-size:1rem}
.font-grid-empty .empty-icon{font-size:3rem;margin-bottom:1rem;display:block}

.font-card.highlight{border-color:var(--accent);box-shadow:0 0 0 3px var(--ring);animation:card-pulse 2s ease-in-out}
@keyframes card-pulse{0%,100%{box-shadow:0 0 0 3px var(--ring)}50%{box-shadow:0 0 0 10px transparent}}

/* ===== TOAST ===== */
.toast{position:fixed;bottom:2rem;left:50%;transform:translateX(-50%)translateY(100px);background:var(--card);color:var(--foreground);border:1px solid var(--border);padding:0.75rem 1.5rem;border-radius:100px;font-size:0.9rem;font-weight:600;box-shadow:var(--shadow-card-hover);z-index:9999;opacity:0;transition:all .3s cubic-bezier(.68,-.55,.265,1.55);pointer-events:none}
.toast.show{opacity:1;transform:translateX(-50%)translateY(0)}
.toast.success{border-color:#22c55e;color:#166534}.dark .toast.success{color:#86efac}
.toast.error{border-color:#ef4444;color:#991b1b}.dark .toast.error{color:#fca5a5}

/* ===== SHARE MODAL ===== */
.modal-overlay{position:fixed;inset:0;z-index:9998;background:rgba(0,0,0,0.5);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity var(--transition-normal)}
.modal-overlay.active{opacity:1;pointer-events:auto}
.modal-dialog{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;max-width:420px;width:90%;box-shadow:var(--shadow-card-hover);text-align:center}
.modal-dialog h3{margin:0 0 0.5rem;font-size:1.1rem;color:var(--foreground);font-family:var(--font-heading)}
.modal-dialog .preview-text{background:var(--muted);padding:0.75rem;border-radius:0.5rem;font-size:0.9rem;color:var(--foreground);word-break:break-all;margin-bottom:1rem;max-height:200px;overflow-y:auto}
.share-btn-group{display:flex;justify-content:space-evenly;flex-wrap:nowrap}
.share-btn-social{display:flex;flex-direction:column;align-items:center;gap:0.35rem;padding:0.5rem 0.6rem;border:none;background:transparent;color:var(--muted-foreground);cursor:pointer;font-size:0.7rem;font-weight:600;transition:all var(--transition-fast);min-width:64px}
.share-btn-social:hover{color:var(--foreground)}
.share-btn-icon{width:3rem;height:3rem;border-radius:50%;background:var(--muted);display:flex;align-items:center;justify-content:center;margin-bottom:0.1rem}
.modal-close{margin-top:1rem;padding:0.5rem 1.5rem;border-radius:100px;border:1px solid var(--border);background:var(--muted);color:var(--muted-foreground);cursor:pointer;font-size:0.85rem;font-weight:600;transition:all var(--transition-fast)}
.modal-close:hover{background:var(--border);color:var(--foreground)}

/* ===== SCROLL TO TOP ===== */
.scroll-top-btn{position:fixed;bottom:2rem;right:1.5rem;z-index:50;width:2.75rem;height:2.75rem;border-radius:50%;border:1px solid var(--border);background:var(--card);color:var(--foreground);cursor:pointer;font-size:1.2rem;box-shadow:var(--shadow-neumorphic);display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:all var(--transition-fast)}
.scroll-top-btn.visible{opacity:1;pointer-events:auto}
.scroll-top-btn:hover{background:var(--accent);color:var(--accent-foreground);border-color:var(--accent);box-shadow:var(--shadow-card-hover)}

/* ===== SHARE BAR ===== */
.share-btn{width:44px;height:44px;border-radius:50%;border:1px solid var(--border);background:color-mix(in srgb,var(--card) 85%,transparent);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);color:var(--muted-foreground);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1rem;transition:all var(--transition-fast);box-shadow:var(--shadow-neumorphic)}
.share-btn:hover{background:var(--accent);color:var(--accent-foreground);border-color:var(--accent)}
.share-toast{position:fixed;bottom:2rem;left:50%;transform:translateX(-50%)translateY(100px);background:var(--card);color:var(--foreground);border:1px solid var(--border);padding:0.75rem 1.5rem;border-radius:100px;font-size:0.9rem;font-weight:600;box-shadow:var(--shadow-card-hover);z-index:9999;opacity:0;transition:all .3s cubic-bezier(.68,-.55,.265,1.55);pointer-events:none}
.share-toast.show{opacity:1;transform:translateX(-50%)translateY(0)}

/* ===== COLLAPSIBLE NAV ===== */
.tool-card{background:color-mix(in srgb,var(--card) 85%,transparent);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);border:1px solid var(--border);box-shadow:var(--shadow-neumorphic);border-radius:var(--radius)}
.collapse-trigger{cursor:pointer;user-select:none}
.collapse-nav{max-height:0;overflow:hidden;transition:max-height .35s ease}
.collapse-nav.open{max-height:600px}
.collapse-arrow{transition:transform .3s ease}.collapse-arrow.open{transform:rotate(180deg)}

/* ===== FAQ ===== */
.faq-item{cursor:pointer;padding:1rem;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);transition:all var(--transition-fast);box-shadow:var(--shadow-neumorphic)}
.faq-item:hover{border-color:var(--accent)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-icon{transition:transform .3s ease;flex-shrink:0}

/* ===== SEO / FEATURES ===== */
.seo-section{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:2rem;margin:2rem 0;box-shadow:var(--shadow-neumorphic)}
.seo-section h2{font-family:var(--font-heading);font-size:1.5rem;font-weight:700;color:var(--foreground);margin-top:0}
.seo-section h3{font-size:1.15rem;font-weight:600;color:var(--foreground);margin:1.5rem 0 0.5rem}
.seo-section p{font-size:0.95rem;line-height:1.7;color:var(--muted-foreground)}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.5rem;margin:1.5rem 0}
.feature-item{background:var(--muted);padding:1.25rem;border-radius:var(--radius);border:1px solid var(--border);box-shadow:var(--shadow-neumorphic-inset)}
.feature-item h4{font-size:1rem;font-weight:600;color:var(--foreground);margin:0 0 0.5rem;font-family:var(--font-heading)}
.feature-item p{font-size:0.85rem;color:var(--muted-foreground);margin:0}

/* ===== TEAM CARD ===== */
.team-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:2rem;display:flex;flex-direction:column;align-items:center;gap:1.5rem;box-shadow:var(--shadow-neumorphic)}
@media(min-width:768px){.team-card{flex-direction:row;text-align:left}}
.team-avatar{width:5rem;height:5rem;border-radius:50%;overflow:hidden;flex-shrink:0}

/* ===== FOOTER ===== */
.site-footer{position:relative;z-index:10;background:var(--card);border-top:1px solid var(--border);padding:1.5rem 1rem;margin-top:auto}
.footer-inner{display:flex;flex-direction:column;align-items:center;gap:0.75rem;max-width:72rem;margin:0 auto}
@media(min-width:768px){.footer-inner{flex-direction:row;justify-content:space-between}}
.footer-brand{font-size:1.25rem;font-weight:700;color:var(--brand);font-family:var(--font-heading)}
.footer-copy{font-size:0.85rem;color:var(--muted-foreground)}
.footer-email{font-size:0.85rem;color:var(--muted-foreground);text-decoration:none;transition:color var(--transition-fast)}
.footer-email:hover{color:var(--accent)}

/* ===== RESPONSIVE ===== */
@media(max-width:640px){
    .hero-section{padding:2.5rem 1rem 1.5rem}
    .font-gen-container{padding:0 0.5rem}
    .font-grid{gap:0.5rem}
    .control-actions{flex-direction:column;align-items:center}
    #toggleGroup{justify-content:center}
    .search-wrapper{width:100%}
    .search-wrapper .font-search{width:100%}
    .seo-section{padding:1.25rem}
    .feature-grid{grid-template-columns:1fr}
    /* 移动端：为 main 下所有内容区补充左右安全边距，避免贴满视口边缘 */
    main.max-w-4xl{padding-left:var(--px-margin-mobile);padding-right:var(--px-margin-mobile)}
    main.max-w-4xl > section{max-width:100%}
    .quiz-view{padding-left:0;padding-right:0}
}
@media(max-width:639px){
}

/* ===== UTILITIES + LEGACY SUPPORT ===== */
.text-center{text-align:center}.w-full{width:100%}.max-w-4xl{max-width:56rem}.max-w-3xl{max-width:48rem}.max-w-7xl{max-width:72rem}
.mx-auto{margin-left:auto;margin-right:auto}.relative{position:relative}
.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}
.gap-sm{gap:0.5rem}.gap-md{gap:1rem}.gap-lg{gap:1.5rem}
.py-lg{padding-top:1.5rem;padding-bottom:1.5rem}.py-20{padding-top:5rem;padding-bottom:5rem}.py-12{padding-top:3rem;padding-bottom:3rem}
.pt-2{padding-top:0.5rem}.pt-4{padding-top:1rem}.mt-1{margin-top:0.25rem}.mt-4{margin-top:1rem}.mt-8{margin-top:2rem}.mt-16{margin-top:4rem}
.mb-3{margin-bottom:0.75rem}.mb-4{margin-bottom:1rem}.mb-6{margin-bottom:1.5rem}.mb-8{margin-bottom:2rem}.mb-16{margin-bottom:4rem}
.space-y-2>*+*{margin-top:0.5rem}.space-y-4{display:flex;flex-direction:column;gap:1rem}.space-y-8>*+*{margin-top:2rem}.space-x-8>*+*{margin-left:2rem}
.list-none{list-style:none;padding:0;margin:0}.list-disc{list-style:disc}.pl-8{padding-left:2rem}.pl-lg{padding-left:1.5rem}
.no-underline{text-decoration:none}.transition-colors{transition:color var(--transition-fast)}.transition-all{transition:all var(--transition-fast)}.duration-200{transition-duration:.2s}.duration-300{transition-duration:.3s}
.font-bold{font-weight:700}.font-semibold{font-weight:600}.font-medium{font-weight:500}
.text-sm{font-size:.875rem}.text-lg{font-size:1.125rem}.text-xl{font-size:1.25rem}.text-2xl{font-size:1.5rem}.text-3xl{font-size:1.875rem}.text-4xl{font-size:2.25rem}.text-5xl{font-size:3rem}
.tracking-tight{letter-spacing:-0.025em}.leading-relaxed{line-height:1.625}
.rounded-xl{border-radius:.75rem}.rounded-lg{border-radius:.5rem}.rounded-full{border-radius:9999px}
.overflow-hidden{overflow:hidden}.hidden{display:none}.block{display:block}.inline-flex{display:inline-flex}
.p-4{padding:1rem}.p-md{padding:1rem}.p-lg{padding:1.5rem}.p-8{padding:2rem}.p-0{padding:0}.m-0{margin:0}
.cursor-pointer{cursor:pointer}.flex-shrink-0{flex-shrink:0}.whitespace-nowrap{white-space:nowrap}.select-none{user-select:none}.pointer-events-none{pointer-events:none}
.z-10{z-index:10}.z-40{z-index:40}.z-50{z-index:50}

/* Legacy color passthrough */
.text-purple-900,.text-purple-600,.text-purple-500,.text-purple-400,.text-purple-300,.text-gray-700,.text-gray-600,.text-gray-500,.text-gray-400,.text-gray-200,.text-white\/70,.text-white\/80,.text-white\/60,.text-white\/50{color:var(--foreground)}
.hover\:text-purple-600:hover,.hover\:text-purple-700:hover,.hover\:text-purple-300:hover{color:var(--accent)}
.bg-purple-100{background:var(--muted)}.border-purple-200{border-color:var(--accent)}.border-t{border-top:1px solid var(--border)}.border-t.border-gray-200{border-color:var(--border)!important}.border-b{border-bottom:1px solid var(--border)}.border-border{border-color:var(--border)}.glow-box{box-shadow:var(--shadow-neumorphic)}
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1rem}
.tool-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem}
.tool-item h3{font-size:1.1rem;font-weight:700;margin:0 0 0.5rem;color:var(--foreground)}
.tool-desc{font-size:.875rem;line-height:1.5;color:var(--muted-foreground);margin:0;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden;min-height:2.625rem}

.material-symbols-outlined{font-family:'Material Symbols Outlined';font-weight:400;font-style:normal;font-size:24px;line-height:1;letter-spacing:normal;text-transform:none;display:inline-block;white-space:nowrap;word-wrap:normal;direction:ltr;-webkit-font-smoothing:antialiased}
.hero-header{padding-top:160px}
@media(max-width:640px){.hero-header{padding-top:80px}.hero-header h1{font-size:2.44rem;overflow:hidden}}
footer .gradient-text{background:linear-gradient(135deg,var(--brand)0%,var(--brand-light)50%,#fbbf24 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

/* ===== ACCESSIBILITY: Reduced Motion ===== */
@media(prefers-reduced-motion:reduce){
    *,*::before,*::after{animation-duration:0.001ms!important;animation-iteration-count:1!important;transition-duration:0.001ms!important;scroll-behavior:auto!important}
    .aurora-bg::before{animation:none!important;background-position:0% 50%!important}
    .floating-particles,.particle{animation:none!important;opacity:0!important}
}