/* ════════════════════════════
   LogiCode by KATELIER
   style.css
════════════════════════════ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --ink: #1a1714;
  --ink2: #3d3830;
  --muted: #8c8070;
  --paper: #f5f2ed;
  --paper2: #eeeae3;
  --purple: #5b21b6;
  --purple2: #7c3aed;
  --lav: #c4b5fd;
  --accent: #e8e0d4;
  --charcoal: #1a1714;
  --line: rgba(26, 23, 20, 0.12);
  --f-serif: 'Shippori Mincho', serif;
  --f-roman: 'Cormorant Garamond', serif;
  --f-sans: 'Noto Sans JP', sans-serif;
  --f-mono: 'Space Mono', monospace;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--f-sans);
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

/* ── UTILITY ── */
.mono { font-family: var(--f-mono); font-size: 11px; letter-spacing: .08em; color: var(--muted); }
.serif { font-family: var(--f-serif); }
.roman { font-family: var(--f-roman); }

/* ── REVEAL ANIMATION ── */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s ease, transform .8s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ════════════════════════════
   HEADER
════════════════════════════ */
header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 99;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 6%;
  border-bottom: 1px solid var(--line);
  background: rgba(245, 242, 237, .94);
  backdrop-filter: blur(10px);
}

.h-logo {
  display: flex; flex-direction: column; gap: 1px;
  text-decoration: none; color: var(--ink);
}
.h-logo-main {
  font-family: var(--f-mono); font-size: 17px; font-weight: 700;
  letter-spacing: -.02em; line-height: 1;
}
.h-logo-main span { color: var(--purple2); }
.h-logo-sub { font-size: 9px; letter-spacing: .2em; color: var(--muted); text-transform: uppercase; }

nav { display: flex; gap: 36px; align-items: center; }
nav a {
  text-decoration: none; color: var(--ink2); font-size: 13px;
  font-weight: 400; letter-spacing: .04em;
  border-bottom: 1px solid transparent;
  transition: border-color .2s, color .2s;
  padding-bottom: 1px;
}
nav a:hover { color: var(--purple2); border-color: var(--purple2); }

.h-cta {
  display: inline-block;
  border: 1.5px solid var(--ink);
  color: var(--ink);
  text-decoration: none;
  font-size: 12px; font-weight: 500; letter-spacing: .08em;
  padding: 8px 20px;
  transition: all .25s;
  text-transform: uppercase;
}
.h-cta:hover { background: var(--ink); color: var(--paper); }

/* ════════════════════════════
   HERO
════════════════════════════ */
.hero {
  min-height: 100vh;
  padding: 140px 6% 80px;
  position: relative;
  display: grid;
  grid-template-rows: auto auto;
  overflow: hidden;
}

.hero-bg-text {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -54%);
  font-family: var(--f-roman);
  font-size: clamp(100px, 18vw, 240px);
  font-weight: 300; font-style: italic;
  color: rgba(91, 33, 182, .055);
  white-space: nowrap;
  pointer-events: none; user-select: none;
  letter-spacing: -.04em; line-height: 1;
}

.hero-eyebrow { display: flex; align-items: center; gap: 16px; margin: 32px 0; }
.hero-eyebrow-line { width: 40px; height: 1px; background: var(--muted); }
.hero-eyebrow span { font-size: 11px; letter-spacing: .18em; color: var(--muted); text-transform: uppercase; }

.hero-title {
  font-family: var(--f-serif);
  font-size: clamp(32px, 4vw, 58px);
  font-weight: 800; line-height: 1.15;
  letter-spacing: -.02em; color: var(--ink);
  max-width: 800px; position: relative; z-index: 1;
  white-space: nowrap;
}
.hero-title .hl {
  color: var(--purple2);
  font-style: italic; font-family: var(--f-roman); font-weight: 600;
}

.hero-bottom {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 60px; align-items: end;
  margin-top: 60px; padding-top: 40px;
  border-top: 1px solid var(--line);
  position: relative; z-index: 1;
}

.hero-desc { font-size: clamp(15px, 1.5vw, 17px); color: var(--ink2); line-height: 2; font-weight: 300; }

.hero-right { display: flex; flex-direction: column; align-items: flex-end; gap: 28px; }
.hero-cta-wrap { display: flex; flex-direction: column; align-items: flex-end; gap: 12px; }

.btn-fill {
  display: inline-block;
  background: var(--purple); color: var(--paper);
  text-decoration: none;
  font-size: 14px; font-weight: 500; letter-spacing: .06em;
  padding: 16px 40px; transition: all .25s;
}
.btn-fill:hover { background: var(--purple2); transform: translateX(-4px); }

.btn-line {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--muted); text-decoration: none;
  font-size: 12px; letter-spacing: .08em;
  border-bottom: 1px solid var(--line); padding-bottom: 3px;
  transition: color .2s, border-color .2s;
}
.btn-line:hover { color: var(--purple2); border-color: var(--purple2); }

.hero-note { font-size: 11px; color: var(--muted); letter-spacing: .06em; line-height: 1.8; text-align: right; }

/* ════════════════════════════
   DIVIDER
════════════════════════════ */
.divider { padding: 0 6%; display: flex; align-items: center; overflow: hidden; }
.divider-text {
  white-space: nowrap; font-family: var(--f-roman); font-style: italic;
  font-size: 13px; color: var(--muted); letter-spacing: .12em;
  padding: 14px 32px 14px 0; border-right: 1px solid var(--line);
}
.divider-line { flex: 1; height: 1px; background: var(--line); }

/* ════════════════════════════
   CONCEPT
════════════════════════════ */
.concept {
  padding: 120px 6%;
  display: grid; grid-template-columns: 1fr 2fr;
  gap: 80px; align-items: start;
  border-bottom: 1px solid var(--line);
}

.concept-label { padding-top: 8px; }
.concept-label .mono { display: block; margin-bottom: 16px; }
.concept-num {
  font-family: var(--f-roman); font-size: 80px; font-weight: 300; font-style: italic;
  color: var(--accent); line-height: 1;
}

.concept-body h2 {
  font-family: var(--f-serif); font-size: clamp(22px, 2.8vw, 36px);
  font-weight: 700; line-height: 1.5; letter-spacing: -.01em; margin-bottom: 32px;
}
.concept-body p {
  font-size: 16px; color: var(--ink2); line-height: 2.1;
  font-weight: 300; max-width: 560px; margin-bottom: 20px;
}
.concept-pull {
  margin-top: 48px; padding: 32px 0;
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  font-family: var(--f-serif); font-size: clamp(20px, 2.5vw, 28px);
  font-weight: 600; line-height: 1.6; color: var(--purple);
}

/* ════════════════════════════
   PROBLEMS
════════════════════════════ */
.problems { padding: 120px 6%; background: var(--ink); color: var(--paper); }

.problems-header {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 60px; margin-bottom: 80px; padding-bottom: 60px;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}
.problems-header .mono { color: var(--lav); }
.problems-header h2 {
  font-family: var(--f-serif); font-size: clamp(22px, 2.8vw, 36px);
  font-weight: 700; line-height: 1.45; margin-top: 16px;
}
.problems-header p { font-size: 15px; color: rgba(255, 255, 255, .55); line-height: 2; font-weight: 300; margin-top: 16px; }

.problem-list { display: flex; flex-direction: column; }
.problem-item {
  display: grid; grid-template-columns: 80px 1fr;
  gap: 40px; align-items: baseline;
  padding: 36px 0; border-bottom: 1px solid rgba(255, 255, 255, .08);
  transition: background .3s;
}
.problem-item:hover { background: rgba(255, 255, 255, .03); padding-left: 12px; padding-right: 12px; margin: 0 -12px; }
.problem-item-num {
  font-family: var(--f-roman); font-size: 48px; font-weight: 300; font-style: italic;
  color: rgba(196, 181, 253, .3); line-height: 1;
}
.problem-item-body h3 { font-size: 20px; font-weight: 700; color: var(--paper); margin-bottom: 8px; font-family: var(--f-serif); }
.problem-item-body p { font-size: 14px; color: rgba(255, 255, 255, .5); line-height: 1.9; font-weight: 300; }

/* ════════════════════════════
   FEATURES
════════════════════════════ */
.features { padding: 120px 6%; border-bottom: 1px solid var(--line); }

.features-header { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; margin-bottom: 80px; }
.features-header h2 {
  font-family: var(--f-serif); font-size: clamp(22px, 2.8vw, 36px);
  font-weight: 700; line-height: 1.45; margin-top: 16px;
}
.features-header p { font-size: 15px; color: var(--ink2); line-height: 2; font-weight: 300; padding-top: 8px; align-self: center; }

.feature-list {
  display: grid; grid-template-columns: 1fr 1fr 1fr;
  border-top: 1px solid var(--line); border-left: 1px solid var(--line);
}
.feature-item {
  padding: 40px 32px;
  border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
  transition: background .25s;
}
.feature-item:hover { background: var(--paper2); }
.feature-item-index {
  font-family: var(--f-mono); font-size: 10px; letter-spacing: .1em;
  margin-bottom: 20px; display: inline-block;
  background: var(--purple); padding: 3px 8px; color: #fff;
}
.feature-item h3 { font-family: var(--f-serif); font-size: 19px; font-weight: 700; line-height: 1.4; margin-bottom: 12px; }
.feature-item p { font-size: 13px; color: var(--ink2); line-height: 1.9; font-weight: 300; }

/* ════════════════════════════
   HOW
════════════════════════════ */
.how { padding: 120px 6%; background: var(--paper2); border-bottom: 1px solid var(--line); }
.how-inner { max-width: 900px; }
.how h2 {
  font-family: var(--f-serif); font-size: clamp(22px, 2.8vw, 36px);
  font-weight: 700; line-height: 1.4; margin-top: 16px; margin-bottom: 72px;
}

.step-list { display: flex; flex-direction: column; }
.step-item {
  display: grid; grid-template-columns: 200px 1fr;
  gap: 48px; padding: 48px 0;
  border-top: 1px solid var(--line); align-items: start;
}
.step-num {
  font-family: var(--f-roman); font-size: 72px; font-weight: 300; font-style: italic;
  color: var(--purple2); opacity: .25; line-height: 1; display: block; margin-bottom: 4px;
}
.step-label { font-size: 11px; letter-spacing: .15em; color: var(--muted); text-transform: uppercase; }
.step-right h3 { font-family: var(--f-serif); font-size: 22px; font-weight: 700; margin-bottom: 12px; margin-top: 8px; }
.step-right p { font-size: 14px; color: var(--ink2); line-height: 2; font-weight: 300; }
.step-tag {
  display: inline-block; background: var(--purple); color: #fff;
  font-size: 10px; letter-spacing: .1em; padding: 3px 10px; margin-bottom: 12px; text-transform: uppercase;
}

/* ════════════════════════════
   VOICES
════════════════════════════ */
.voices { padding: 120px 6%; border-bottom: 1px solid var(--line); }
.voices-header {
  display: flex; align-items: baseline; justify-content: space-between;
  margin-bottom: 64px; padding-bottom: 32px; border-bottom: 1px solid var(--line);
  flex-wrap: wrap; gap: 20px;
}
.voices-header h2 { font-family: var(--f-serif); font-size: clamp(22px, 2.5vw, 34px); font-weight: 700; line-height: 1.3; }
.voices-header h2 em { font-style: italic; font-family: var(--f-roman); color: var(--purple2); }

.voice-list { display: flex; flex-direction: column; }
.voice-item {
  display: grid; grid-template-columns: 140px 1fr 200px;
  gap: 48px; align-items: baseline;
  padding: 40px 0; border-bottom: 1px solid var(--line);
  transition: background .2s;
}
.voice-item:hover { background: var(--paper2); padding-left: 16px; padding-right: 16px; margin: 0 -16px; }
.voice-meta-top .mono { display: block; margin-bottom: 6px; }
.voice-name { font-size: 14px; font-weight: 500; color: var(--ink); }
.voice-detail { font-size: 11px; color: var(--muted); margin-top: 2px; }
.voice-body {
  font-family: var(--f-serif); font-size: clamp(16px, 1.8vw, 20px);
  font-weight: 600; line-height: 1.7; color: var(--ink);
}
.voice-body::before {
  content: '"'; font-family: var(--f-roman); font-size: 40px;
  font-weight: 300; font-style: italic; color: var(--lav);
  display: block; line-height: 1; margin-bottom: 8px;
}
.voice-tag { text-align: right; align-self: center; }
.voice-tag span {
  display: inline-block; border: 1px solid var(--purple); color: var(--purple);
  font-size: 11px; letter-spacing: .08em; padding: 4px 12px;
}

/* ════════════════════════════
   TARGETS
════════════════════════════ */
.targets {
  padding: 120px 6%; display: grid; grid-template-columns: 1fr 1fr;
  border-bottom: 1px solid var(--line);
}
.target-block { padding: 0 60px 0 0; border-right: 1px solid var(--line); }
.target-block:last-child { padding: 0 0 0 60px; border-right: none; }
.target-block .mono { margin-bottom: 16px; display: block; }
.target-block h3 { font-family: var(--f-serif); font-size: 28px; font-weight: 700; margin-bottom: 32px; line-height: 1.4; }
.target-block ul { list-style: none; display: flex; flex-direction: column; gap: 16px; }
.target-block li {
  font-size: 14px; color: var(--ink2); line-height: 1.8; font-weight: 300;
  display: flex; align-items: flex-start; gap: 12px;
  padding-bottom: 16px; border-bottom: 1px solid var(--line);
}
.target-block li:last-child { border-bottom: none; }
.target-block li::before { content: '→'; color: var(--purple2); font-family: var(--f-mono); font-size: 12px; flex-shrink: 0; margin-top: 2px; }

/* ════════════════════════════
   CTA
════════════════════════════ */
.cta-sec {
  padding: 120px 6%;
  background: var(--ink);
  color: var(--paper);
}

.cta-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.cta-left .mono { color: var(--lav); margin-bottom: 20px; display: block; }
.cta-left h2 {
  font-family: var(--f-serif); font-size: clamp(26px, 3.2vw, 42px);
  font-weight: 800; line-height: 1.3; margin-bottom: 24px;
}
.cta-left h2 em { font-style: italic; font-family: var(--f-roman); color: var(--lav); font-weight: 300; }
.cta-left p { font-size: 14px; color: rgba(255, 255, 255, .55); line-height: 2; font-weight: 300; }

.cta-right { display: flex; flex-direction: column; gap: 16px; }
.btn-cta-main {
  display: block; text-align: center; background: var(--paper); color: var(--ink);
  text-decoration: none; font-size: 15px; font-weight: 500; letter-spacing: .06em;
  padding: 22px 40px; transition: all .25s;
}
.btn-cta-main:hover { background: var(--lav); transform: translateX(6px); }
.btn-cta-sub {
  display: block; text-align: center;
  border: 1px solid rgba(255, 255, 255, .25); color: rgba(255, 255, 255, .7);
  text-decoration: none; font-size: 13px; letter-spacing: .06em;
  padding: 16px 40px; transition: all .25s;
}
.btn-cta-sub:hover { border-color: rgba(255, 255, 255, .6); color: var(--paper); }
.cta-note { font-size: 11px; color: rgba(255, 255, 255, .3); letter-spacing: .06em; text-align: center; margin-top: 8px; }

/* ════════════════════════════
   FOOTER
════════════════════════════ */
footer {
  padding: 40px 6%;
  background: var(--charcoal);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.f-logo { text-decoration: none; }
footer p { font-size: 11px; color: rgba(255,255,255,.35); letter-spacing: .04em; }

/* ════════════════════════════
   RESPONSIVE
════════════════════════════ */
@media (max-width: 900px) {
  nav { display: none; }
  .hero-bottom { grid-template-columns: 1fr; }
  .hero-right { align-items: flex-start; }
  .hero-note { text-align: left; }
  .concept { grid-template-columns: 1fr; gap: 40px; }
  .problems-header { grid-template-columns: 1fr; }
  .features-header { grid-template-columns: 1fr; }
  .feature-list { grid-template-columns: 1fr 1fr; }
  .step-item { grid-template-columns: 100px 1fr; gap: 24px; }
  .voice-item { grid-template-columns: 1fr; gap: 12px; }
  .voice-tag { text-align: left; }
  .targets { grid-template-columns: 1fr; }
  .target-block { padding: 0 0 60px 0; border-right: none; border-bottom: 1px solid var(--line); }
  .target-block:last-child { padding: 60px 0 0 0; border-bottom: none; }
  .cta-inner { grid-template-columns: 1fr; gap: 48px; }
}

@media (max-width: 600px) {
  .feature-list { grid-template-columns: 1fr; }
  .hero-bg-text { display: none; }
}

/* ════════════════════════════
   SKIP LINK
════════════════════════════ */
.skip-link {
  position: absolute; top: -40px; left: 0;
  background: var(--purple); color: #fff;
  padding: 8px 16px; z-index: 9999;
  transition: top .2s; text-decoration: none; font-size: 13px;
}
.skip-link:focus { top: 0; }

/* ════════════════════════════
   CASES
════════════════════════════ */
.cases {
  padding: 120px 6%;
  background: var(--ink);
  color: var(--paper);
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.cases-header {
  margin-bottom: 64px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,.1);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: end;
}

.cases-header .mono { color: var(--lav); display: block; margin-bottom: 16px; grid-column: 1 / -1; }

.cases-header h2 {
  font-family: var(--f-serif);
  font-size: clamp(22px, 2.8vw, 36px);
  font-weight: 700; line-height: 1.4;
}

.cases-header p {
  font-size: 15px; color: rgba(255,255,255,.55);
  line-height: 2; font-weight: 300;
  align-self: end;
}

.case-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid rgba(255,255,255,.08);
  border-left: 1px solid rgba(255,255,255,.08);
}

.case-item {
  padding: 40px 32px;
  border-right: 1px solid rgba(255,255,255,.08);
  border-bottom: 1px solid rgba(255,255,255,.08);
  transition: background .25s;
}
.case-item:hover { background: rgba(255,255,255,.04); }

.case-tag {
  display: flex; flex-direction: column; gap: 4px;
  margin-bottom: 20px;
}
.case-tag .mono { color: var(--lav); }
.case-label {
  font-size: 11px; color: rgba(255,255,255,.4);
  letter-spacing: .06em;
}

.case-item h3 {
  font-family: var(--f-serif);
  font-size: 19px; font-weight: 700;
  line-height: 1.5; margin-bottom: 14px;
  color: var(--paper);
}

.case-item p {
  font-size: 13px; color: rgba(255,255,255,.5);
  line-height: 1.9; font-weight: 300;
}

/* ════════════════════════════
   LESSONS
════════════════════════════ */
.lessons {
  padding: 120px 6%;
  background: var(--paper2);
  border-bottom: 1px solid var(--line);
}

.lessons-inner { max-width: 1100px; }

.lessons-inner .mono { display: block; margin-bottom: 16px; }

.lessons-inner h2 {
  font-family: var(--f-serif);
  font-size: clamp(22px, 2.8vw, 36px);
  font-weight: 700; line-height: 1.4;
  margin-bottom: 64px;
}

.lesson-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.lesson-item {
  padding: 36px 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: background .25s;
}
.lesson-item:hover { background: var(--paper); }

.lesson-item-label {
  display: block; margin-bottom: 12px;
}

.lesson-item h3 {
  font-family: var(--f-serif);
  font-size: 20px; font-weight: 700;
  margin-bottom: 10px; line-height: 1.3;
}

.lesson-item p {
  font-size: 13px; color: var(--ink2);
  line-height: 1.9; font-weight: 300;
}

/* ════════════════════════════
   FAQ
════════════════════════════ */
.faq {
  padding: 120px 6%;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.faq .how-inner { max-width: 900px; }

.faq h2 {
  font-family: var(--f-serif);
  font-size: clamp(22px, 2.8vw, 36px);
  font-weight: 700; line-height: 1.4;
  margin-top: 16px; margin-bottom: 72px;
}

.faq-q {
  font-family: var(--f-roman);
  font-size: 56px !important;
  font-weight: 300;
  font-style: italic;
  opacity: .25 !important;
  color: var(--purple2) !important;
  line-height: 1;
}

/* ════════════════════════════
   RESPONSIVE
   320 / 375 / 425 / 768 / 1024 / 1440
════════════════════════════ */

/* ── 1440px以上: 余白を広げる ── */
@media (min-width: 1440px) {
  header { padding: 20px 8%; }
  .hero { padding: 160px 8% 100px; }
  section, .concept, .problems, .features,
  .how, .faq, .cases, .targets, .lessons,
  .voices, .cta-sec { padding-left: 8%; padding-right: 8%; }
  .hero-title { font-size: 84px; }
}

/* ── 1024px以下: 少し締める ── */
@media (max-width: 1024px) {
  .hero-title { font-size: clamp(32px, 5.5vw, 64px); }
  .step-item { grid-template-columns: 160px 1fr; }
  .cases-header { grid-template-columns: 1fr; }
  .case-list { grid-template-columns: 1fr 1fr; }
}

/* ── 768px以下: タブレット縦 ── */
@media (max-width: 768px) {
  /* ヘッダー */
  nav { display: none; }
  .h-cta { font-size: 11px; padding: 7px 14px; }

  /* ヒーロー */
  .hero { padding: 120px 5% 60px; }
  .hero-title { font-size: clamp(28px, 6.5vw, 44px); white-space: normal; line-height: 1.2; }
  .hero-bottom { grid-template-columns: 1fr; gap: 32px; }
  .hero-right { align-items: flex-start; }
  .hero-note { text-align: left; }
  .hero-desc { font-size: 15px; }
  .hero-bg-text { font-size: clamp(80px, 20vw, 140px); }

  /* コンセプト */
  .concept { grid-template-columns: 1fr; gap: 32px; padding: 80px 5%; }
  .concept-num { font-size: 60px; }
  .concept-body h2 { font-size: clamp(24px, 4vw, 36px); }
  .concept-body p { font-size: 15px; }
  .concept-pull { font-size: clamp(18px, 3vw, 24px); }

  /* フィロソフィー */
  .features { padding: 80px 5%; }
  .features-header { grid-template-columns: 1fr; gap: 20px; margin-bottom: 48px; }
  .feature-list { grid-template-columns: 1fr 1fr; }
  .feature-item h3 { font-size: 16px; line-height: 1.4; }
  .feature-item { padding: 28px 20px; }

  /* ケーススタディ */
  .cases { padding: 80px 5%; }
  .case-list { grid-template-columns: 1fr; }

  /* ターゲット */
  .targets { grid-template-columns: 1fr; padding: 80px 5%; }
  .target-block { padding: 0 0 48px 0; border-right: none; border-bottom: 1px solid var(--line); }
  .target-block:last-child { padding: 48px 0 0 0; border-bottom: none; }

  /* レッスン情報 */
  .lessons { padding: 80px 5%; }
  .lesson-grid { grid-template-columns: 1fr 1fr; }
  .lesson-item { padding: 24px 16px; }
  .lesson-item h3 { font-size: 16px; line-height: 1.4; }

  /* ステップ */
  .how { padding: 80px 5%; }
  .step-item { grid-template-columns: 80px 1fr; gap: 20px; padding: 36px 0; }
  .step-num { font-size: 52px; }
  .step-right h3 { font-size: 18px; }

  /* FAQ */
  .faq { padding: 80px 5%; }

  /* CTA */
  .cta-sec { grid-template-columns: 1fr; gap: 40px; padding: 80px 5%; }
  .cta-left h2 { font-size: clamp(28px, 5vw, 44px); }

  /* problems */
  .problems { padding: 80px 5%; }
  .problems-header { grid-template-columns: 1fr; gap: 24px; margin-bottom: 48px; padding-bottom: 40px; }
  .problem-item { grid-template-columns: 60px 1fr; gap: 24px; padding: 28px 0; }
  .problem-item-num { font-size: 36px; }
}

/* ── 425px以下: 大きめスマホ ── */
@media (max-width: 425px) {
  header { padding: 14px 5%; }
  .h-logo-main { font-size: 15px; }
  .h-cta { display: none; }

  .hero { padding: 100px 5% 48px; }
  .hero-title { font-size: clamp(36px, 9vw, 52px); line-height: 1.15; }
  .hero-bg-text { display: none; }
  .hero-desc { font-size: 14px; line-height: 1.9; }
  .btn-fill { padding: 14px 28px; font-size: 13px; }

  .concept { padding: 64px 5%; gap: 24px; }
  .concept-body h2 { font-size: clamp(22px, 6vw, 30px); margin-bottom: 20px; }

  .features { padding: 64px 5%; }
  .feature-list { grid-template-columns: 1fr; }
  .feature-item { padding: 28px 20px; }

  .cases { padding: 64px 5%; }
  .case-item { padding: 28px 20px; }
  .case-item h3 { font-size: 17px; }

  .targets { padding: 64px 5%; }
  .target-block h3 { font-size: 22px; margin-bottom: 20px; }

  .lessons { padding: 64px 5%; }
  .lesson-grid { grid-template-columns: 1fr; }
  .lesson-item { padding: 24px 20px; }
  .lesson-item h3 { font-size: 18px; line-height: 1.3; }

  .how { padding: 64px 5%; }
  .step-item { grid-template-columns: 1fr; gap: 8px; padding: 28px 0; }
  .step-left { display: flex; align-items: baseline; gap: 12px; }
  .step-num { font-size: 40px; display: inline-block; margin-bottom: 0; }

  .faq { padding: 64px 5%; }
  .faq .step-item { grid-template-columns: 40px 1fr; gap: 12px; }
  .faq-q { font-size: 36px !important; }

  .cta-sec { padding: 64px 5%; }
  .cta-left h2 { font-size: clamp(26px, 7vw, 36px); }
  .btn-cta-main { padding: 18px 24px; font-size: 14px; }

  .footer-inner { flex-direction: column; align-items: flex-start; gap: 16px; }
}

/* ── 375px以下: 標準スマホ ── */
@media (max-width: 375px) {
  .hero-title { font-size: clamp(32px, 9vw, 44px); }
  .concept-body h2 { font-size: 20px; }
  .concept-pull { font-size: 17px; padding: 20px 0; }
  .voices-header h2 { font-size: 24px; }
  .voice-item { gap: 8px; }
  .voice-body { font-size: 15px; }
  .step-right h3 { font-size: 16px; }
  .step-right p { font-size: 13px; }
  .feature-item h3 { font-size: 14px; }
  .lesson-item h3 { font-size: 14px; }
  section { padding-left: 4%; padding-right: 4%; }
}

/* ── 320px以下: 最小スマホ ── */
@media (max-width: 320px) {
  .hero-title { font-size: 28px; }
  .hero-desc { font-size: 13px; }
  .concept-body h2 { font-size: 18px; }
  .btn-fill { padding: 12px 20px; font-size: 12px; width: 100%; text-align: center; }
  .btn-cta-main { font-size: 13px; }
  .feature-item h3 { font-size: 16px; }
  .case-item h3 { font-size: 15px; }
  .target-block h3 { font-size: 18px; }
  .lesson-item h3 { font-size: 16px; }
}

/* ════════════════════════════
   CASE SECTION LABEL
════════════════════════════ */
.case-section-label {
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: .12em;
  color: var(--lav);
  text-transform: uppercase;
  margin-top: 20px;
  margin-bottom: 6px;
  display: block;
}

.case-item p + p { margin-top: 0; }

/* ════════════════════════════
   CASE LINK（※リンク）
════════════════════════════ */
.case-link {
  color: var(--lav);
  text-decoration: none;
  border-bottom: 1px solid var(--lav);
  font-size: 11px;
  vertical-align: super;
  transition: color .2s, border-color .2s;
}
.case-link:hover { color: #fff; border-color: #fff; }

/* ════════════════════════════
   CASE NOTE（※注釈）
════════════════════════════ */
.case-note {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,.08);
  font-size: 11px;
  color: rgba(255,255,255,.3);
  line-height: 1.8;
  font-family: var(--f-sans);
  font-weight: 300;
}

/* ════════════════════════════
   CASE FOOTNOTES
════════════════════════════ */
.case-footnotes {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,.06);
}
.case-footnote {
  font-size: 10px;
  color: rgba(255,255,255,.25);
  line-height: 1.8;
  font-family: var(--f-sans);
  font-weight: 300;
  letter-spacing: .04em;
}

/* ════════════════════════════
   LESSON FOOTNOTES
════════════════════════════ */
.lesson-footnotes {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.lesson-footnote {
  font-size: 10px;
  color: var(--muted);
  line-height: 1.8;
  font-family: var(--f-sans);
  font-weight: 300;
  letter-spacing: .04em;
}

/* ════════════════════════════
   HOW FOOTNOTES
════════════════════════════ */
.how-footnotes {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.how-footnote {
  font-size: 10px;
  color: var(--muted);
  line-height: 1.8;
  font-family: var(--f-sans);
  font-weight: 300;
  letter-spacing: .04em;
}
.how-link {
  color: var(--purple2);
  text-decoration: none;
  border-bottom: 1px solid var(--lav);
  font-size: 11px;
  vertical-align: super;
  transition: color .2s, border-color .2s;
}
.how-link:hover { color: var(--purple); border-color: var(--purple); }

/* ════════════════════════════
   FAQ LINK
════════════════════════════ */
.faq-link {
  color: var(--purple2);
  text-decoration: none;
  border-bottom: 1px solid var(--lav);
  transition: color .2s, border-color .2s;
}
.faq-link:hover { color: var(--purple); border-color: var(--purple); }

/* ════════════════════════════
   ABOUT
════════════════════════════ */
.about {
  padding: 120px 6%;
  background: var(--paper2);
  border-bottom: 1px solid var(--line);
}

.about-inner { max-width: 1100px; }
.about-inner .mono { display: block; margin-bottom: 40px; }

.about-grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 72px;
  align-items: start;
}

.about-photo-wrap {
  position: relative;
  aspect-ratio: 3 / 4;
  background: var(--accent);
  border-radius: 4px;
  overflow: hidden;
}

.about-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* 写真が未設定の場合のプレースホルダー */
.about-photo-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: var(--muted);
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .1em;
}

/* imgが読み込めた場合はプレースホルダーを隠す */
.about-img + .about-photo-placeholder { display: none; }

.about-body h2 {
  font-family: var(--f-serif);
  font-size: clamp(22px, 2.8vw, 36px);
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 8px;
}

.about-name {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: .08em;
  margin-bottom: 20px;
}

.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.about-tag {
  display: inline-block;
  border: 1px solid var(--purple);
  color: var(--purple);
  font-size: 11px;
  letter-spacing: .06em;
  padding: 4px 12px;
  border-radius: 2px;
}

.about-body p {
  font-size: 15px;
  color: var(--ink2);
  line-height: 2;
  font-weight: 300;
  margin-bottom: 16px;
}

.about-body p:last-child { margin-bottom: 0; }

/* レスポンシブ */
@media (max-width: 768px) {
  .about { padding: 80px 5%; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-photo-wrap { max-width: 280px; }
}

@media (max-width: 425px) {
  .about { padding: 64px 5%; }
  .about-photo-wrap { max-width: 240px; }
  .about-tags { gap: 6px; }
}

/* ════════════════════════════
   横幅統一
════════════════════════════ */
.hero > *,
.concept,
.about-inner,
.features-header,
.feature-list,
.cases-header,
.case-list,
.case-footnotes,
.lessons-inner,
.how-inner,
.faq .how-inner,
.cta-inner {
  max-width: 1200px;
}

.concept,
.features,
.cases,
.lessons,
.how,
.faq,
.about,
.cta-sec {
  box-sizing: border-box;
}

/* セクション内コンテンツを中央揭げ */
.features-header,
.feature-list,
.cases-header,
.case-list,
.case-footnotes {
  margin-left: auto;
  margin-right: auto;
  width: 100%;
}

/* ════════════════════════════
   FOOTER NAV
════════════════════════════ */
.footer-nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  align-items: center;
}

.footer-nav a {
  font-size: 12px;
  color: rgba(255, 255, 255, .45);
  text-decoration: none;
  transition: color .2s;
}

.footer-nav a:hover {
  color: rgba(255, 255, 255, .8);
}