:root {
  --bg-primary: #FAF6F0;
  --bg-secondary: #F3EDE3;
  --bg-card: #FFFFFF;
  --bg-card-hover: #FFF9F2;
  --accent-1: #D4A574;
  --accent-2: #8B7355;
  --accent-3: #C4956A;
  --text-primary: #3D3028;
  --text-secondary: #6B5D4F;
  --text-muted: #9B8E80;
  --correct: #5A8F5A;
  --correct-bg: #E8F3E8;
  --incorrect: #C45C5C;
  --incorrect-bg: #FAEAEA;
  --border: #E8DFD3;
  --shadow-sm: 0 1px 3px rgba(61,48,40,0.06);
  --shadow-md: 0 4px 12px rgba(61,48,40,0.08);
  --shadow-lg: 0 8px 30px rgba(61,48,40,0.12);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --past: #6B89A8;
  --past-light: #E4EDF5;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{font-family:'Noto Sans JP',sans-serif;background:var(--bg-primary);color:var(--text-primary);min-height:100dvh;-webkit-tap-highlight-color:transparent;overflow-x:hidden;}
a{color:inherit;text-decoration:none;}
.container{max-width:640px;margin:0 auto;padding:0 20px;}

/* Header */
.header{position:sticky;top:0;z-index:100;background:rgba(250,246,240,0.85);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border);padding:14px 0;transition:box-shadow .3s;}
.header.scrolled{box-shadow:var(--shadow-md);}
.header-inner{display:flex;align-items:center;gap:12px;}
.back-btn{display:flex;background:none;border:none;font-size:22px;color:var(--accent-2);cursor:pointer;padding:4px 8px;border-radius:8px;transition:background .2s;text-decoration:none;}
.back-btn:hover{background:var(--bg-secondary);}
.header-title{font-family:'Zen Maru Gothic',sans-serif;font-size:17px;font-weight:700;letter-spacing:.02em;}
.header-subtitle{font-size:11px;color:var(--text-muted);font-weight:400;}

/* Hero */
.home-hero{text-align:center;padding:48px 0 32px;}
.home-hero-icon{width:88px;height:88px;background:linear-gradient(155deg,#C4956A 0%,#D4A574 40%,#E8C9A0 100%);border-radius:26px;display:inline-flex;align-items:center;justify-content:center;margin-bottom:24px;box-shadow:0 8px 28px rgba(180,130,80,0.28),0 2px 8px rgba(180,130,80,0.12),inset 0 1px 0 rgba(255,255,255,0.3);position:relative;}
.home-hero-icon::after{content:'';position:absolute;inset:0;border-radius:26px;border:1.5px solid rgba(255,255,255,0.25);pointer-events:none;}
.home-hero-icon svg{width:44px;height:44px;filter:drop-shadow(0 1px 2px rgba(60,40,20,0.15));}
.home-hero h1{font-family:'Zen Maru Gothic',sans-serif;font-size:26px;font-weight:700;margin-bottom:8px;line-height:1.3;}
.home-hero p{font-size:14px;color:var(--text-secondary);line-height:1.6;}

/* Cards */
.cards{display:flex;flex-direction:column;gap:16px;padding-bottom:40px;}
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px 24px;cursor:pointer;transition:all .25s ease;position:relative;overflow:hidden;display:block;}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);background:var(--bg-card-hover);}
.card:active{transform:scale(0.98);}
.card::before{content:'';position:absolute;top:0;left:0;width:5px;height:100%;border-radius:4px 0 0 4px;}
.card.type1::before{background:linear-gradient(180deg,#D4A574,#C4956A);}
.card.type2::before{background:linear-gradient(180deg,#8B7355,#6B5D4F);}
.card.past-card::before{background:linear-gradient(180deg,#6B89A8,#8BABC8);}
.card.original-card::before{background:linear-gradient(180deg,#D4A574,#C4956A);}
.card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;}
.card-badge{font-size:11px;font-weight:600;padding:4px 12px;border-radius:20px;letter-spacing:.04em;}
.badge-type1{background:#FFF0E0;color:#B8854A;}
.badge-type2{background:#EDE8E0;color:#6B5D4F;}
.badge-past{background:var(--past-light);color:var(--past);}
.badge-original{background:#FFF0E0;color:#B8854A;}
.card-arrow{font-size:18px;color:var(--text-muted);transition:transform .2s;}
.card:hover .card-arrow{transform:translateX(4px);}
.card h2{font-family:'Zen Maru Gothic',sans-serif;font-size:20px;font-weight:700;margin-bottom:6px;}
.card h3{font-size:16px;font-weight:600;margin-bottom:3px;}
.card p{font-size:13px;color:var(--text-secondary);line-height:1.5;}
.card-meta{display:flex;gap:16px;margin-top:16px;font-size:12px;color:var(--text-muted);}
.card-meta span{display:flex;align-items:center;gap:4px;}
.card-meta svg{flex-shrink:0;}

/* Subject / Item cards */
.item-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:20px;transition:all .25s ease;display:flex;align-items:center;gap:16px;}
.item-card:hover{transform:translateY(-1px);box-shadow:var(--shadow-md);}
.item-card:active{transform:scale(0.98);}
.item-icon{width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0;}
.item-icon.law{background:#EDE3F5;}
.item-icon.hygiene{background:#E0F0E8;}
.item-icon.physiology{background:#E5EDF8;}
.item-icon.year{background:var(--past-light);font-size:14px;font-weight:700;color:var(--past);}
.item-icon.mode-past{background:var(--past-light);}
.item-icon.mode-original{background:#FFF0E0;}
.item-card-body{flex:1;}
.item-card-body h3{font-size:16px;font-weight:600;margin-bottom:2px;}
.item-card-body p{font-size:12px;color:var(--text-muted);line-height:1.5;}
.item-chevron{color:var(--text-muted);font-size:16px;}
.progress-bar-mini{width:100%;height:4px;background:var(--bg-secondary);border-radius:2px;margin-top:8px;overflow:hidden;}
.progress-bar-mini-fill{height:100%;border-radius:2px;transition:width .4s ease;}
.progress-bar-mini-fill.accent{background:var(--accent-1);}
.progress-bar-mini-fill.past-color{background:var(--past);}

/* Section header */
.section-header{padding:32px 0 20px;}
.section-header h2{font-family:'Zen Maru Gothic',sans-serif;font-size:22px;font-weight:700;margin-bottom:4px;}
.section-header p{font-size:13px;color:var(--text-secondary);}

/* Breadcrumb */
.breadcrumb{padding:16px 0 0;font-size:12px;color:var(--text-muted);display:flex;flex-wrap:wrap;gap:4px;}
.breadcrumb a{color:var(--accent-2);text-decoration:none;}
.breadcrumb a:hover{text-decoration:underline;}
.breadcrumb span{color:var(--text-muted);}

/* Quiz */
.quiz-top{padding:20px 0 12px;display:flex;align-items:center;justify-content:space-between;}
.quiz-progress-text{font-size:13px;font-weight:500;color:var(--text-secondary);}
.quiz-score{font-size:13px;font-weight:500;}
.quiz-score.accent{color:var(--accent-2);}
.quiz-score.past-color{color:var(--past);}
.quiz-progress-bar{width:100%;height:6px;background:var(--bg-secondary);border-radius:3px;overflow:hidden;margin-bottom:24px;}
.quiz-progress-fill{height:100%;border-radius:3px;transition:width .4s ease;}
.quiz-progress-fill.accent{background:linear-gradient(90deg,var(--accent-1),var(--accent-3));}
.quiz-progress-fill.past-color{background:linear-gradient(90deg,#6B89A8,#8BABC8);}
.question-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px 22px;margin-bottom:16px;box-shadow:var(--shadow-sm);}
.question-number{font-size:12px;font-weight:600;margin-bottom:10px;letter-spacing:.04em;}
.question-number.accent{color:var(--accent-1);}
.question-number.past-color{color:var(--past);}
.question-text{font-size:15px;font-weight:500;line-height:1.7;}
.choices{display:flex;flex-direction:column;gap:10px;margin-bottom:20px;padding-bottom:30px;}
.choice-btn{background:var(--bg-card);border:1.5px solid var(--border);border-radius:var(--radius-md);padding:16px 18px;font-size:14px;line-height:1.6;text-align:left;cursor:pointer;transition:all .2s ease;display:flex;gap:12px;align-items:flex-start;font-family:inherit;color:var(--text-primary);width:100%;}
.choice-btn:hover:not(.disabled){border-color:var(--accent-1);background:var(--bg-card-hover);}
.choice-btn:active:not(.disabled){transform:scale(0.98);}
.choice-label{width:26px;height:26px;border-radius:50%;background:var(--bg-secondary);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;color:var(--text-secondary);flex-shrink:0;transition:all .2s;}
.choice-btn.correct{border-color:var(--correct);background:var(--correct-bg);}
.choice-btn.correct .choice-label{background:var(--correct);color:#fff;}
.choice-btn.incorrect{border-color:var(--incorrect);background:var(--incorrect-bg);}
.choice-btn.incorrect .choice-label{background:var(--incorrect);color:#fff;}
.choice-btn.disabled{cursor:default;opacity:.7;}
.choice-btn.correct.disabled{opacity:1;}
.explanation-box{background:var(--bg-secondary);border-radius:var(--radius-md);padding:20px;margin-bottom:16px;display:none;animation:fadeIn .3s ease;}
.explanation-box.visible{display:block;}
.explanation-title{font-size:13px;font-weight:600;color:var(--accent-2);margin-bottom:8px;display:flex;align-items:center;gap:6px;}
.explanation-text{font-size:13px;line-height:1.8;color:var(--text-secondary);}
.next-btn{display:none;width:100%;padding:16px;color:#fff;border:none;border-radius:var(--radius-md);font-size:15px;font-weight:600;font-family:inherit;cursor:pointer;transition:all .2s;margin-bottom:40px;}
.next-btn.visible{display:block;}
.next-btn.accent{background:linear-gradient(145deg,var(--accent-1),var(--accent-3));box-shadow:0 4px 14px rgba(212,165,116,0.3);}
.next-btn.past-color{background:linear-gradient(145deg,#6B89A8,#8BABC8);box-shadow:0 4px 14px rgba(107,137,168,0.3);}
.next-btn:hover{transform:translateY(-1px);}
.next-btn:active{transform:scale(0.98);}

/* Result */
.result-container{text-align:center;padding:48px 0 40px;}
.result-circle{width:140px;height:140px;border-radius:50%;background:var(--bg-card);display:inline-flex;flex-direction:column;align-items:center;justify-content:center;margin-bottom:24px;box-shadow:var(--shadow-lg);}
.result-circle.accent{border:4px solid var(--accent-1);}
.result-circle.past-color{border:4px solid var(--past);}
.result-score{font-family:'Zen Maru Gothic',sans-serif;font-size:38px;font-weight:700;line-height:1;}
.result-score.accent{color:var(--accent-2);}
.result-score.past-color{color:var(--past);}
.result-total{font-size:13px;color:var(--text-muted);margin-top:4px;}
.result-message{font-family:'Zen Maru Gothic',sans-serif;font-size:20px;font-weight:700;margin-bottom:8px;}
.result-sub{font-size:14px;color:var(--text-secondary);margin-bottom:32px;line-height:1.6;}
.result-actions{display:flex;flex-direction:column;gap:12px;}
.btn-primary{padding:16px;color:#fff;border:none;border-radius:var(--radius-md);font-size:15px;font-weight:600;font-family:inherit;cursor:pointer;transition:all .2s;display:block;text-align:center;}
.btn-primary.accent{background:linear-gradient(145deg,var(--accent-1),var(--accent-3));box-shadow:0 4px 14px rgba(212,165,116,0.3);}
.btn-primary.past-color{background:linear-gradient(145deg,#6B89A8,#8BABC8);box-shadow:0 4px 14px rgba(107,137,168,0.3);}
.btn-secondary{padding:16px;background:var(--bg-card);color:var(--text-primary);border:1.5px solid var(--border);border-radius:var(--radius-md);font-size:15px;font-weight:500;font-family:inherit;cursor:pointer;transition:all .2s;display:block;text-align:center;}
.btn-primary:hover,.btn-secondary:hover{transform:translateY(-1px);}

/* Footer */
.site-footer{border-top:1px solid var(--border);padding:24px 0;margin-top:40px;text-align:center;font-size:12px;color:var(--text-muted);}

@keyframes fadeIn{from{opacity:0;transform:translateY(8px);}to{opacity:1;transform:translateY(0);}}
@media(max-width:480px){.container{padding:0 16px;}.home-hero{padding:36px 0 24px;}.home-hero h1{font-size:22px;}.card{padding:22px 18px;}.question-card{padding:22px 18px;}.choice-btn{padding:14px 14px;}}
@media(min-width:641px){.cards.two-col{flex-direction:row;}.cards.two-col .card{flex:1;}}