/* ── Variables (Manami's Brand Colors) ── */
:root {
  --bg:        #f7f5f0;
  --surface:   #ffffff;
  --ink:       #1a1a1a;
  --muted:     #6b6b6b;
  --accent:    #2d6a4f;
  --accent2:   #b7d5c8;
  --tag-bg:    #eaf2ee;
  --border:    #e2ddd6;
  --serif:     'DM Serif Display', 'Noto Serif JP', Georgia, serif;
  --sans:      'DM Sans', 'Noto Sans JP', sans-serif;
  --radius:    12px;
  --transition: 0.3s ease;
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--sans); background: var(--bg); color: var(--ink); font-size: 16px; line-height: 1.7; font-weight: 300; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.container { max-width: 960px; margin: 0 auto; padding: 0 24px; }
section { padding: 80px 0; border-top: 1px solid var(--border); }

/* ── Navigation ── */
nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; background: rgba(247, 245, 240, 0.92); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.nav-inner { max-width: 960px; margin: 0 auto; padding: 0 24px; height: 60px; display: flex; align-items: center; justify-content: space-between; }
.nav-logo { font-family: var(--serif); font-size: 1.1rem; letter-spacing: 0.01em; }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a { font-size: 0.85rem; font-weight: 400; color: var(--muted); transition: color var(--transition); }
.nav-links a:hover { color: var(--ink); }
.btn-back { font-size: 0.82rem; font-weight: 500; color: var(--accent); border: 1px solid var(--accent2); border-radius: 6px; padding: 6px 16px; transition: all var(--transition); }
.btn-back:hover { background: var(--tag-bg); }
.lang-toggle { display: flex; align-items: center; gap: 4px; background: var(--surface); border: 1px solid var(--border); border-radius: 20px; padding: 4px 6px; }
.lang-btn { font-size: 0.75rem; font-weight: 500; padding: 3px 10px; border-radius: 16px; border: none; background: transparent; color: var(--muted); cursor: pointer; transition: all var(--transition); font-family: var(--sans); }
.lang-btn.active { background: var(--accent); color: #fff; }

/* ── Hero Sections (Index & Subpages) ── */
#hero, .hero { padding-top: 140px; padding-bottom: 100px; border-top: none; text-align: center;} 
#hero.index-hero { text-align: left; }

.hero-eyebrow { font-size: 0.8rem; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 20px; }
.hero-title, .hero-name { font-family: var(--serif); font-size: clamp(2.5rem, 6vw, 4.5rem); line-height: 1.1; margin-bottom: 16px; }
.hero-title em, .hero-name em { font-style: italic; color: var(--accent); }
.hero-desc, .hero-tagline { font-size: 1.05rem; color: var(--muted); max-width: 580px; margin: 0 auto 40px; line-height: 1.6; }
.index-hero .hero-tagline { margin-left: 0; margin-right: 0; }

.hero-meta { display: flex; gap: 24px; flex-wrap: wrap; margin-bottom: 36px; }
.hero-meta-item { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: var(--muted); font-weight: 500; }
.hero-meta-item span.dot { width: 6px; height: 6px; background: var(--accent); border-radius: 50%; flex-shrink: 0; }

.hero-flex { display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.hero-content { flex: 1; min-width: 300px; }
.hero-avatar { width: 180px; height: 180px; background: var(--surface); border: 1px solid var(--border); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 5rem; flex-shrink: 0; box-shadow: 0 10px 30px rgba(0,0,0,0.05); position: relative; }
.hero-avatar img { width: 100%; height: 100%; border-radius: 50%; object-fit: cover; }

/* ── Typography General ── */
.section-label { font-size: 0.75rem; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 12px; }
.section-title { font-family: var(--serif); font-size: clamp(1.8rem, 4vw, 2.5rem); line-height: 1.15; margin-bottom: 16px; }
.section-desc { color: var(--muted); max-width: 600px; margin-bottom: 48px; }

/* ── Beautiful Buttons ── */
.btn-group { display: flex; justify-content: center; flex-wrap: wrap; gap: 16px; }
.index-hero .btn-group { justify-content: flex-start; margin-top: 0; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 14px 32px; border-radius: 50px; font-size: 0.95rem; font-weight: 600; font-family: var(--sans); text-decoration: none; cursor: pointer; line-height: 1; transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1); border: 2px solid transparent; }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); box-shadow: 0 4px 12px rgba(45, 106, 79, 0.2); }
.btn-primary:hover { background: #1e4d38; border-color: #1e4d38; color: #fff; transform: translateY(-3px); box-shadow: 0 8px 24px rgba(45, 106, 79, 0.3); }
.btn-outline { background: var(--surface); color: var(--ink); border-color: var(--border); box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); background: var(--surface); transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08); }

/* ── One Liner (Sub pages) ── */
.one-liner { background: var(--accent); border-radius: var(--radius); padding: 32px; text-align: center; margin-bottom: 32px; box-shadow: 0 10px 30px rgba(45, 106, 79, 0.15); }
.one-liner p { font-family: var(--serif); font-size: clamp(1.1rem, 2.5vw, 1.5rem); color: #fff; line-height: 1.45; margin-bottom: 0;}
.one-liner em { font-style: italic; opacity: 0.9; }

/* ── Index Page Components ── */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.about-text p { color: var(--muted); margin-bottom: 16px; }
.about-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.stat-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; transition: border-color var(--transition); opacity: 0; transform: translateY(16px); }
.stat-card.visible { opacity: 1; transform: translateY(0); }
.stat-card:hover { border-color: var(--accent2); }
.stat-number { font-family: var(--serif); font-size: 2.2rem; color: var(--accent); line-height: 1; margin-bottom: 4px; }
.stat-label { font-size: 0.8rem; color: var(--muted); line-height: 1.4; }

.projects-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.project-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; display: flex; flex-direction: column; transition: all var(--transition); position: relative; overflow: hidden; opacity: 0; transform: translateY(16px); }
.project-card.visible { opacity: 1; transform: translateY(0); }
.project-card::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--accent); transform: scaleY(0); transition: transform var(--transition); }
.project-card:hover { border-color: var(--accent2); transform: translateY(-2px); box-shadow: 0 8px 32px rgba(45, 106, 79, 0.08); }
.project-card:hover::before { transform: scaleY(1); }
.project-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; margin-bottom: 12px; }
.project-title-wrap { flex: 1; }
.project-number { font-family: var(--serif); font-size: 0.8rem; color: var(--accent); letter-spacing: 0.08em; margin-bottom: 8px; }
.project-title { font-family: var(--serif); font-size: 1.5rem; margin-bottom: 0; line-height: 1.2; }
.project-badge-inline { display: flex; align-items: center; gap: 10px; background: var(--tag-bg); padding: 8px 12px; border-radius: 8px; border: 1px solid var(--accent2); flex-shrink: 0; }
.project-badge-inline .badge-icon { font-size: 1.4rem; line-height: 1; margin: 0; }
.project-badge-inline .badge-label { font-size: 0.7rem; color: var(--accent); font-weight: 600; line-height: 1.3; text-align: left; }
.project-subtitle { font-size: 0.85rem; color: var(--accent); font-weight: 500; margin-bottom: 16px; }
.project-desc { font-size: 0.9rem; color: var(--muted); margin-bottom: 24px; line-height: 1.7; flex: 1; }
.project-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.tag { font-size: 0.72rem; font-weight: 500; padding: 4px 10px; background: var(--tag-bg); color: var(--accent); border-radius: 20px; letter-spacing: 0.02em; }
.project-links { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 0; }
.project-link { font-size: 0.8rem; font-weight: 600; padding: 8px 16px; border-radius: 20px; background: var(--surface); color: var(--ink); border: 1px solid var(--border); transition: all 0.2s ease; display: inline-flex; align-items: center; gap: 6px; box-shadow: 0 2px 4px rgba(0,0,0,0.02); }
.project-link:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(45, 106, 79, 0.1); }

.skills-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.skill-group { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; transition: border-color var(--transition); opacity: 0; transform: translateY(16px); }
.skill-group.visible { opacity: 1; transform: translateY(0); }
.skill-group:hover { border-color: var(--accent2); }
.skill-group-icon { font-size: 1.4rem; margin-bottom: 12px; }
.skill-group-title { font-family: var(--serif); font-size: 1rem; margin-bottom: 16px; }
.skill-list { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.skill-list li { font-size: 0.85rem; color: var(--muted); display: flex; align-items: center; gap: 8px; }
.skill-list li::before { content: ''; width: 4px; height: 4px; background: var(--accent); border-radius: 50%; flex-shrink: 0; }

.timeline { display: flex; flex-direction: column; gap: 0; }
.timeline-item { display: grid; grid-template-columns: 120px 1fr; gap: 24px; padding: 28px 0; border-bottom: 1px solid var(--border); opacity: 0; transform: translateY(16px); transition: all var(--transition); }
.timeline-item.visible { opacity: 1; transform: translateY(0); }
.timeline-item:last-child { border-bottom: none; }
.timeline-year { font-size: 0.8rem; color: var(--muted); font-weight: 400; padding-top: 3px; }
.timeline-role { font-family: var(--serif); font-size: 1.1rem; margin-bottom: 4px; }
.timeline-detail { font-size: 0.85rem; color: var(--muted); }

.offer-box { background: var(--tag-bg); padding: 48px; border-radius: var(--radius); border: 1px solid var(--accent2); text-align: center; max-width: 800px; margin: 0 auto; }

/* ── Common Sub-Page Components ── */
.tech-cards { display: grid; gap: 18px; }
.tech-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; display: grid; grid-template-columns: 52px 1fr; gap: 20px; align-items: start; transition: all var(--transition); opacity: 0; transform: translateY(14px); }
.tech-card.visible { opacity: 1; transform: translateY(0); }
.tech-card:hover { border-color: var(--accent2); box-shadow: 0 8px 24px rgba(0,0,0,0.04); }
.tech-icon { width: 52px; height: 52px; background: var(--tag-bg); border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 1.4rem; flex-shrink: 0; }
.tech-label { font-size: 0.68rem; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); margin-bottom: 3px; }
.tech-title { font-family: var(--serif); font-size: 1.15rem; margin-bottom: 7px; }
.tech-desc { font-size: 0.86rem; color: var(--muted); line-height: 1.7; }
.tech-pill { display: inline-block; margin-top: 10px; font-size: 0.7rem; font-weight: 500; background: var(--tag-bg); color: var(--accent); border-radius: 20px; padding: 4px 12px; }

.biz-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.biz-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; opacity: 0; transform: translateY(12px); transition: opacity .5s ease, transform .5s ease; }
.biz-card.visible { opacity: 1; transform: translateY(0); }
.biz-card:hover { border-color: var(--accent2); }
.biz-icon { font-size: 1.6rem; margin-bottom: 10px; }
.biz-industry { font-size: 0.68rem; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); margin-bottom: 4px; }
.biz-title { font-family: var(--serif); font-size: 1.05rem; margin-bottom: 8px; }
.biz-desc { font-size: 0.84rem; color: var(--muted); line-height: 1.7; }
.biz-result { margin-top: 12px; font-size: 0.78rem; font-weight: 500; color: var(--accent); background: var(--tag-bg); border-radius: 6px; padding: 6px 12px; display: inline-block; }

.why-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.why-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; opacity: 0; transform: translateY(10px); transition: opacity .5s ease, transform .5s ease; }
.why-card.visible { opacity: 1; transform: translateY(0); }
.why-card:hover { border-color: var(--accent2); }
.why-icon { font-size: 1.3rem; margin-bottom: 8px; }
.why-title { font-family: var(--serif); font-size: 0.95rem; margin-bottom: 6px; }
.why-desc { font-size: 0.83rem; color: var(--muted); line-height: 1.65; }

/* ── Flow/Code Components (Life-Value, Prompt Builder, Shift) ── */
.flow { display: flex; flex-direction: column; }
.flow-step { display: grid; grid-template-columns: 44px 1fr; gap: 18px; padding: 22px 0; border-bottom: 1px solid var(--border); opacity: 0; transform: translateX(-10px); transition: opacity .5s ease, transform .5s ease; }
.flow-step.visible { opacity: 1; transform: translateX(0); }
.flow-step:last-child { border-bottom: none; }
.flow-num { width: 38px; height: 38px; background: var(--accent); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: var(--serif); font-size: 0.95rem; color: #fff; flex-shrink: 0; }
.flow-title { font-family: var(--serif); font-size: 1rem; margin-bottom: 5px; }
.flow-desc { font-size: 0.85rem; color: var(--muted); line-height: 1.65; }
.flow-code { margin-top: 10px; background: #1a1a1a; border-radius: 8px; padding: 14px 18px; font-family: 'Courier New', monospace; font-size: 0.76rem; color: #b7d5c8; line-height: 1.65; overflow-x: auto; }
.flow-code .cm { color: #6b9c7a; }
.flow-code .kw { color: #f5c96e; }
.flow-code .nu { color: #7ec8e3; }
.flow-code .st { color: #98d4a0; }

/* ── Life-Value Optimizer Specifics ── */
.example-box { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.example-header { background: var(--accent); padding: 20px 28px; color: #fff; }
.example-header h3 { font-family: var(--serif); font-size: 1.15rem; margin-bottom: 0; color: #fff;}
.example-header p { font-size: 0.8rem; opacity: 0.8; margin-top: 3px; margin-bottom: 0; }
.example-body { padding: 28px; }
.item-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 20px; }
.item-card { border: 1px solid var(--border); border-radius: 10px; padding: 18px; transition: border-color var(--transition); }
.item-card.winner { border-color: var(--accent); background: var(--tag-bg); }
.item-name { font-family: var(--serif); font-size: 0.95rem; margin-bottom: 10px; }
.item-scores { display: flex; flex-direction: column; gap: 7px; }
.score-row { display: flex; align-items: center; gap: 8px; font-size: 0.78rem; margin-bottom: 0; color: var(--ink); }
.score-label { width: 68px; color: var(--muted); flex-shrink: 0; }
.score-bar-wrap { flex: 1; background: var(--border); border-radius: 4px; height: 5px; overflow: hidden; }
.score-bar { height: 100%; background: var(--accent); border-radius: 4px; transition: width 1.2s ease; }
.score-num { width: 18px; text-align: right; font-weight: 500; color: var(--accent); font-size: 0.76rem; }
.winner-badge { display: inline-block; margin-top: 10px; background: var(--accent); color: #fff; font-size: 0.7rem; font-weight: 500; border-radius: 20px; padding: 3px 12px; }
.formula-box { background: #1a1a1a; border-radius: 10px; padding: 18px 22px; }
.formula-title { font-size: 0.7rem; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; color: #6b9c7a; margin-bottom: 10px; }
.formula { font-family: 'Courier New', monospace; font-size: 0.78rem; color: #e8e4dc; line-height: 1.8; }
.formula .hi { color: #f5c96e; }
.formula .val { color: #7ec8e3; }
.formula .result { color: #b7d5c8; font-weight: 700; }

/* ── Prompt Builder Specifics ── */
.prompt-anatomy { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; margin-bottom: 24px; }
.anatomy-header { padding: 16px 24px; color: #fff; }
.anatomy-header h3 { font-family: var(--serif); font-size: 1.05rem; margin-bottom: 0; color: #fff; }
.anatomy-body { padding: 0; }
.anatomy-row { display: grid; grid-template-columns: 130px 1fr; border-bottom: 1px solid var(--border); }
.anatomy-row:last-child { border-bottom: none; }
.anatomy-label { padding: 14px 16px; font-size: 0.76rem; font-weight: 500; color: var(--accent); background: var(--tag-bg); border-right: 1px solid var(--border); display: flex; align-items: flex-start; }
.anatomy-content { padding: 14px 18px; font-size: 0.82rem; color: var(--muted); line-height: 1.6; }
.anatomy-content strong { color: var(--ink); font-weight: 500; }
.category-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.category-card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 16px; transition: all var(--transition); opacity: 0; transform: translateY(8px); }
.category-card.visible { opacity: 1; transform: translateY(0); }
.category-card:hover { border-color: var(--accent2); }
.cat-icon { font-size: 1.2rem; margin-bottom: 6px; }
.cat-name { font-family: var(--serif); font-size: 0.88rem; margin-bottom: 3px; }
.cat-role { font-size: 0.72rem; color: var(--accent); font-weight: 500; }
.cat-desc { font-size: 0.72rem; color: var(--muted); margin-top: 4px; line-height: 1.5; }

/* ── Shift Optimizer Specifics ── */
.constraint-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.constraint-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; opacity: 0; transform: translateY(12px); transition: opacity .5s ease, transform .5s ease; }
.constraint-card.visible { opacity: 1; transform: translateY(0); }
.constraint-card:hover { border-color: var(--accent2); }
.constraint-type { font-size: 0.65rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; padding: 4px 10px; border-radius: 20px; display: inline-block; margin-bottom: 12px; }
.constraint-type.hard { background: #fdecea; color: #c0392b; }
.constraint-type.soft { background: var(--tag-bg); color: var(--accent); }
.constraint-title { font-family: var(--serif); font-size: 1.05rem; margin-bottom: 8px; }
.constraint-desc { font-size: 0.84rem; color: var(--muted); line-height: 1.6; }

/* ── Promo ROI Specifics ── */
.uplift-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 32px; }
.compare-box { border-radius: var(--radius); padding: 24px; border: 1px solid var(--border); }
.compare-box.traditional { background: #fff8f0; border-color: #e8c09a; }
.compare-box.uplift-box { background: var(--tag-bg); border-color: var(--accent2); }
.compare-title { font-family: var(--serif); font-size: 1rem; margin-bottom: 12px; }
.compare-title.trad { color: #c0392b; }
.compare-title.up { color: var(--accent); }
.compare-row { display: flex; align-items: center; gap: 8px; font-size: 0.83rem; margin-bottom: 6px; color: var(--ink); }
.dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.dot-red { background: #c0392b; }
.dot-green { background: var(--accent); }

.quadrant-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; margin-bottom: 32px; }
.quadrant-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3px; background: #ddd; border-radius: 8px; overflow: hidden; margin-bottom: 12px; }
.quad { padding: 20px; display: flex; flex-direction: column; gap: 5px; }
.quad-sure { background: var(--tag-bg); }
.quad-persuade { background: #e8f0f8; }
.quad-sleeping { background: #fdecea; }
.quad-lost { background: #f5f5f5; }
.quad-name { font-family: var(--serif); font-size: 1rem; font-weight: bold; }
.quad-ja { font-size: 0.75rem; color: var(--muted); font-style: italic; }
.quad-desc { font-size: 0.8rem; color: var(--muted); line-height: 1.5; }
.quad-action { font-size: 0.75rem; font-weight: 500; margin-top: 2px; }
.quad-name.sure, .quad-action.sure { color: var(--accent); }
.quad-name.persuade, .quad-action.persuade { color: #1a4a7a; }
.quad-name.sleeping, .quad-action.sleeping { color: #c0392b; }
.quad-name.lost, .quad-action.lost { color: #666; }
.axis-label { display: flex; justify-content: space-between; font-size: 0.7rem; color: var(--muted); }
.quad-wrap-inner { display: flex; gap: 8px; }
.axis-y { writing-mode: vertical-rl; font-size: 0.7rem; color: var(--muted); text-align: center; flex-shrink: 0; }

/* ── Back to Top Button ── */
.back-to-top { position: fixed; bottom: 30px; right: 30px; width: 50px; height: 50px; border-radius: 50%; background: var(--surface); color: var(--accent); border: 2px solid var(--accent); font-size: 1.2rem; font-weight: bold; cursor: pointer; box-shadow: 0 4px 12px rgba(0,0,0,0.1); opacity: 0; visibility: hidden; transition: all 0.3s ease; z-index: 999; display: flex; align-items: center; justify-content: center; }
.back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--accent); color: #fff; transform: translateY(-5px); box-shadow: 0 8px 24px rgba(45, 106, 79, 0.3); }

/* ── Footer & CTA ── */
.cta-section { padding: 80px 0; text-align: center; border-top: 1px solid var(--border); }
footer { border-top: 1px solid var(--border); padding: 32px 0; text-align: center; font-size: 0.8rem; color: var(--muted); }

/* ── Responsive ── */
@media(max-width: 860px) { .projects-grid  { grid-template-columns: 1fr; } }
@media(max-width: 768px) {
  .hero-flex { flex-direction: column-reverse; align-items: flex-start; gap: 24px; }
  .hero-avatar { width: 120px; height: 120px; font-size: 3.5rem; }
  .tech-card { grid-template-columns: 1fr; gap: 12px; }
  .why-grid, .constraint-grid { grid-template-columns: 1fr; }
  .project-header { flex-direction: column; }
}
@media (max-width: 700px) {
  .about-grid     { grid-template-columns: 1fr; }
  .skills-grid    { grid-template-columns: 1fr 1fr; }
  .timeline-item  { grid-template-columns: 80px 1fr; gap: 16px; }
  .item-compare { grid-template-columns: 1fr; }
  .anatomy-row { grid-template-columns: 1fr; }
  .anatomy-label { border-right: none; border-bottom: 1px solid var(--border); }
  .category-grid { grid-template-columns: 1fr 1fr; }
  .uplift-compare, .quadrant-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .skills-grid { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .back-to-top { bottom: 20px; right: 20px; width: 44px; height: 44px; }
  .category-grid { grid-template-columns: 1fr; }
}