/* CSS / UTF-8 / LF
   TaK Consulting — site styles
   Palette
     primary  charcoal  #3D3D3D
     accent   teal      #3AAF8A
     base     white     #FFFFFF
*/

:root {
  --c-ink: #2c2c2c;
  --c-ink-2: #3d3d3d;
  --c-ink-3: #5b5b5b;
  --c-ink-4: #828282;
  --c-line: #e2e4e2;
  --c-line-2: #ededeb;
  --c-bg: #ffffff;
  --c-bg-2: #f7f8f6;
  --c-bg-3: #f2f3f0;
  --c-accent: #3aaf8a;
  --c-accent-d: #2f9676;
  --c-accent-l: #e7f5ef;

  --ff-jp: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif;
  --ff-en: "Cormorant Garamond", "Times New Roman", "Hiragino Mincho ProN", serif;
  --ff-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --maxw: 1120px;
  --maxw-narrow: 880px;
  --pad-x: clamp(20px, 5vw, 56px);

  --header-h: 72px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--ff-jp);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-ink);
  background: var(--c-bg);
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

/* ---- Header ---- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.94);
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--c-line);
}
.site-header__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  height: var(--header-h);
  padding: 0 var(--pad-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  display: inline-flex;
  align-items: center;
  color: var(--c-ink);
  line-height: 0;
}
.logo img {
  display: block;
  height: 44px;
  width: auto;
}
.site-footer .logo img { height: 48px; }

.nav { display: flex; align-items: center; gap: 28px; }
.nav__list { display: flex; align-items: center; gap: 26px; list-style: none; margin: 0; padding: 0; }
.nav__list a {
  display: inline-block;
  padding: 6px 0;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--c-ink-2);
  border-bottom: 1px solid transparent;
  transition: color .15s, border-color .15s;
}
.nav__list a:hover { color: var(--c-accent-d); }
.nav__list a.is-active { color: var(--c-ink); border-bottom-color: var(--c-accent); }
.nav__cta {
  display: inline-flex; align-items: center; gap: 8px;
  height: 40px; padding: 0 18px;
  background: var(--c-accent);
  color: #fff !important;
  font-size: 14px; font-weight: 500; letter-spacing: 0.04em;
  border-radius: 2px;
  transition: background .15s;
}
.nav__cta:hover { background: var(--c-accent-d); }

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  background: none; border: 1px solid var(--c-line);
  border-radius: 2px; cursor: pointer;
  padding: 0;
}
.nav-toggle__bars { display: block; width: 18px; height: 2px; background: var(--c-ink-2); margin: 0 auto; position: relative; }
.nav-toggle__bars::before, .nav-toggle__bars::after {
  content: ""; position: absolute; left: 0; width: 18px; height: 2px; background: var(--c-ink-2);
}
.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after  { top:  6px; }

@media (max-width: 880px) {
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .nav {
    position: fixed; inset: var(--header-h) 0 auto 0;
    background: #fff;
    border-bottom: 1px solid var(--c-line);
    flex-direction: column; align-items: stretch; gap: 0;
    padding: 8px 0 16px;
    transform: translateY(-110%);
    transition: transform .25s ease;
    box-shadow: 0 8px 24px rgba(0,0,0,0.04);
  }
  body.nav-open .nav { transform: translateY(0); }
  .nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav__list li { border-top: 1px solid var(--c-line-2); }
  .nav__list a { padding: 14px var(--pad-x); font-size: 15px; }
  .nav__cta { margin: 14px var(--pad-x) 0; height: 48px; justify-content: center; }
}

/* ---- Layout ---- */
main { display: block; }
.section {
  padding: clamp(64px, 9vw, 120px) var(--pad-x);
}
.section--tight { padding: clamp(48px, 7vw, 88px) var(--pad-x); }
.section--alt { background: var(--c-bg-2); }
.section--gray { background: #f5f5f5; }
.section--ink { background: var(--c-ink-2); color: #fff; }
.section--ink .eyebrow { color: rgba(255,255,255,0.55); }
.section--ink h2 { color: #fff; }
.section--ink p { color: rgba(255,255,255,0.82); }

.container { max-width: var(--maxw); margin: 0 auto; }
.container--narrow { max-width: var(--maxw-narrow); margin: 0 auto; }

/* ---- Type ---- */
.eyebrow {
  display: inline-block;
  font-family: var(--ff-en);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--c-ink-4);
  margin-bottom: 18px;
}
.eyebrow--accent { color: var(--c-accent-d); }

h1, h2, h3, h4 { color: var(--c-ink); font-weight: 500; letter-spacing: 0.02em; }
h1 {
  font-size: clamp(28px, 4.4vw, 46px);
  line-height: 1.45;
  margin: 0 0 28px;
  font-weight: 500;
  letter-spacing: 0.01em;
}
h2 {
  font-size: clamp(24px, 2.8vw, 32px);
  line-height: 1.55;
  margin: 0 0 24px;
  font-weight: 500;
}
h3 {
  font-size: clamp(17px, 1.6vw, 19px);
  line-height: 1.7;
  margin: 0 0 12px;
  font-weight: 600;
  color: var(--c-ink);
}
h4 {
  font-size: 15px;
  font-weight: 600;
  margin: 0 0 8px;
}
p { margin: 0 0 1.2em; color: var(--c-ink-2); }
p:last-child { margin-bottom: 0; }

.lead {
  font-size: clamp(16px, 1.4vw, 18px);
  line-height: 1.95;
  color: var(--c-ink-2);
}

.section-head { margin-bottom: clamp(32px, 4vw, 56px); }
.section-head h2 { margin-bottom: 12px; }
.section-head p { color: var(--c-ink-3); max-width: 60ch; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  height: 56px; padding: 0 32px;
  font-family: var(--ff-jp);
  font-size: 15px; font-weight: 500; letter-spacing: 0.06em;
  border-radius: 2px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s, transform .15s;
}
.btn--primary {
  background: var(--c-accent); color: #fff;
}
.btn--primary:hover { background: var(--c-accent-d); }
.btn--ghost {
  background: transparent; color: var(--c-ink); border-color: var(--c-line);
}
.btn--ghost:hover { border-color: var(--c-accent); color: var(--c-accent-d); }
.btn .arrow { display: inline-block; transition: transform .15s; }
.btn:hover .arrow { transform: translateX(4px); }

.cta-note {
  display: block;
  margin-top: 14px;
  font-size: 13px;
  color: var(--c-ink-4);
  letter-spacing: 0.04em;
}

/* ---- Hero ---- */
.hero {
  padding: clamp(48px, 7vw, 96px) var(--pad-x) clamp(64px, 9vw, 120px);
  border-bottom: 1px solid var(--c-line);
  background: linear-gradient(180deg, #fcfdfb 0%, #ffffff 100%);
}
.hero__grid {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
}
.hero__copy h1 {
  font-size: clamp(30px, 4.2vw, 48px);
  line-height: 1.5;
  letter-spacing: 0.005em;
}
.hero__copy h1 strong {
  font-weight: 500;
  background: linear-gradient(180deg, transparent 60%, rgba(58,175,138,0.22) 60%);
  padding: 0 0.05em;
}
.hero__copy .lead { margin-bottom: 36px; max-width: 32em; }
.hero__visual {
  position: relative;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--c-line);
  background: #fff;
  overflow: hidden;
}
.hero__visual::after {
  content: "";
  position: absolute; inset: auto 0 0 0;
  height: 4px;
  background: var(--c-accent);
  width: 56px;
}
@media (max-width: 880px) {
  .hero__grid { grid-template-columns: 1fr; }
}

/* ---- Card grids ---- */
.grid { display: grid; gap: 20px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 880px) {
  .grid--3, .grid--4, .grid--2 { grid-template-columns: 1fr; }
}

.card {
  background: #fff;
  border: 1px solid var(--c-line);
  padding: clamp(24px, 2.6vw, 36px);
  display: flex; flex-direction: column; gap: 12px;
  position: relative;
}
.card__num {
  font-family: var(--ff-en);
  font-size: 20px;
  letter-spacing: 0.18em;
  color: var(--c-accent-d);
  margin-bottom: 4px;
  white-space: nowrap;
}
.card__title { font-size: 17px; font-weight: 600; line-height: 1.6; margin: 0 0 6px; color: var(--c-ink); }
.card__body { font-size: 15px; line-height: 1.9; color: var(--c-ink-3); margin: 0; }

.card--feat { border-top: 3px solid var(--c-accent); }
.card--soft { background: #fff; border: 1px solid var(--c-line); }

/* ---- Issue (problem) cards ---- */
.issue-card {
  padding: clamp(24px, 2.6vw, 36px);
  background: #fff;
  border: 1px solid var(--c-line);
}
.issue-card__num {
  display: inline-block;
  font-family: var(--ff-en);
  font-size: 21px; letter-spacing: 0.16em;
  color: var(--c-ink-4);
  margin-bottom: 14px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--c-line);
}
.issue-card__icon {
  width: 44px; height: 44px;
  color: var(--c-accent);
  margin-bottom: 18px;
}
.issue-card__icon svg { width: 100%; height: 100%; display: block; }

/* ---- Step list ---- */
.steps { display: grid; gap: 16px; }
.step {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: clamp(20px, 4vw, 48px);
  padding: 28px 0;
  border-top: 1px solid var(--c-line);
  align-items: start;
}
.step:last-child { border-bottom: 1px solid var(--c-line); }
.step__num {
  font-family: var(--ff-en);
  font-size: 20px; letter-spacing: 0.32em; text-transform: uppercase;
  color: var(--c-accent-d);
  padding-top: 6px;
}
.step__num strong { display: block; font-size: 32px; letter-spacing: 0.02em; color: var(--c-ink); margin-top: 6px; font-weight: 500; }
.step__title { font-size: 19px; font-weight: 600; margin: 0 0 8px; color: var(--c-ink); }
.step__body { font-size: 15px; color: var(--c-ink-3); margin: 0; line-height: 1.9; }
@media (max-width: 720px) {
  .step { grid-template-columns: 1fr; gap: 8px; }
  .step__num strong { display: inline; font-size: 22px; margin-left: 8px; }
}

/* ---- Reasons ---- */
.reason {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 24px;
  padding: 28px 0;
  border-top: 1px solid var(--c-line);
}
.reason:last-child { border-bottom: 1px solid var(--c-line); }
.reason__num {
  font-family: var(--ff-en);
  font-size: 28px; line-height: 1;
  color: var(--c-accent-d);
  padding-top: 4px;
}
.reason__title { font-size: 19px; font-weight: 600; margin: 0 0 8px; color: var(--c-ink); }
.reason__body { font-size: 15px; line-height: 1.95; color: var(--c-ink-3); margin: 0; }

/* ---- Service / Areas ---- */
.area-grid { display: grid; gap: 1px; background: var(--c-line); border: 1px solid var(--c-line); }
.area-grid--3 { grid-template-columns: repeat(3, 1fr); }
.area-grid--2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 880px) { .area-grid--3, .area-grid--2 { grid-template-columns: 1fr; } }
.area {
  background: #fff;
  padding: clamp(24px, 2.6vw, 36px);
  display: flex; flex-direction: column; gap: 8px;
}
.area__label {
  font-family: var(--ff-en);
  font-size: 17px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--c-accent-d);
  margin-bottom: 4px;
}
.area__title { font-size: 20px; font-weight: 600; margin: 0 0 10px; color: var(--c-ink); }
.area__body { font-size: 15px; line-height: 1.9; color: var(--c-ink-3); margin: 0; }

/* ---- Checklist ---- */
.checklist { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.checklist li {
  display: grid; grid-template-columns: 28px 1fr; gap: 8px;
  padding: 16px 0;
  border-bottom: 1px solid var(--c-line-2);
  font-size: 15.5px; line-height: 1.85;
  color: var(--c-ink-2);
}
.checklist li::before {
  content: "✓";
  width: 18px; height: 18px;
  margin-top: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 600;
  color: var(--c-accent);
  line-height: 1;
}

/* ---- Profile section ---- */
.profile-block {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}
.profile-block__photo {
  aspect-ratio: 5 / 6;
  background: #f4f5f2;
  border: 1px solid var(--c-line);
  overflow: hidden;
}
.profile-block__name {
  font-size: 22px; font-weight: 600; margin: 0 0 4px;
  letter-spacing: 0.04em;
}
.profile-block__name .en {
  font-family: var(--ff-en);
  font-size: 16px;
  font-weight: 400;
  color: var(--c-ink-3);
  margin-left: 10px;
  letter-spacing: 0.04em;
}
.profile-block__role {
  font-size: 13px; letter-spacing: 0.18em;
  color: var(--c-accent-d);
  margin-bottom: 20px;
  font-family: var(--ff-jp);
}
.profile-block__body p { font-size: 15.5px; line-height: 1.95; color: var(--c-ink-2); }

@media (max-width: 720px) {
  .profile-block { grid-template-columns: 1fr; }
  .profile-block__photo { max-width: 240px; }
}

/* ---- Tables ---- */
.info-table {
  width: 100%;
  border-collapse: collapse;
  border-top: 1px solid var(--c-line);
  font-size: 15.5px;
}
.info-table th, .info-table td {
  text-align: left;
  padding: 22px 8px;
  border-bottom: 1px solid var(--c-line);
  vertical-align: top;
  line-height: 1.85;
}
.info-table th {
  width: 220px;
  font-weight: 500;
  color: var(--c-ink-3);
  letter-spacing: 0.06em;
}
.info-table td { color: var(--c-ink-2); }
@media (max-width: 720px) {
  .info-table, .info-table tbody, .info-table tr, .info-table th, .info-table td { display: block; width: 100%; }
  .info-table th { padding: 18px 0 4px; border-bottom: none; }
  .info-table td { padding: 0 0 18px; }
}

/* ---- Project cards (profile page) ---- */
.project {
  padding: 32px 0;
  border-top: 1px solid var(--c-line);
}
.project:last-child { border-bottom: 1px solid var(--c-line); }
.project__label {
  font-family: var(--ff-en);
  font-size: 17px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--c-accent-d);
  margin-bottom: 8px;
  white-space: nowrap;
}
.project__title { font-size: 19px; font-weight: 600; margin: 0 0 10px; color: var(--c-ink); }
.project__body { font-size: 15px; line-height: 1.95; color: var(--c-ink-3); margin: 0; }
.project__list { margin: 12px 0 0; padding: 0; list-style: none; display: grid; gap: 6px; }
.project__list li {
  font-size: 14.5px;
  color: var(--c-ink-3);
  padding-left: 14px;
  position: relative;
  line-height: 1.8;
}
.project__list li::before {
  content: ""; position: absolute; left: 0; top: 12px;
  width: 6px; height: 1px; background: var(--c-accent);
}

/* ---- Narrative blocks ---- */
.narrative {
  border-left: 2px solid var(--c-accent);
  padding: 8px 0 8px 28px;
}
.narrative p { font-size: 15.5px; line-height: 2; color: var(--c-ink-2); }
.narrative p + p { margin-top: 1em; }

/* ---- Form ---- */
.form { display: grid; gap: 24px; }
.field { display: grid; gap: 8px; }
.field__label {
  font-size: 14px; font-weight: 500; color: var(--c-ink-2);
  display: flex; align-items: center; gap: 10px;
}
.field__label .req {
  font-family: var(--ff-en);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--c-accent-d);
  border: 1px solid var(--c-accent);
  border-radius: 2px;
  padding: 1px 6px;
}
.field__label .opt {
  font-family: var(--ff-en);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--c-ink-4);
  border: 1px solid var(--c-line);
  border-radius: 2px;
  padding: 1px 6px;
}
.field input, .field textarea {
  width: 100%;
  font: inherit;
  font-family: var(--ff-jp);
  font-size: 15px;
  padding: 14px 16px;
  border: 1px solid var(--c-line);
  border-radius: 2px;
  background: #fff;
  color: var(--c-ink);
  transition: border-color .15s, box-shadow .15s;
}
.field textarea { min-height: 160px; resize: vertical; line-height: 1.85; }
.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(58,175,138,0.12);
}
.form__submit {
  margin-top: 8px;
  display: flex; flex-direction: column; align-items: flex-start; gap: 8px;
}

/* ---- Brand strip ---- */
.brand-strip { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--c-line); border: 1px solid var(--c-line); }
@media (max-width: 720px) { .brand-strip { grid-template-columns: 1fr; } }
.brand-strip__item { background: #fff; padding: 28px clamp(20px, 2.6vw, 36px); }
.brand-strip__name { font-size: 17px; font-weight: 600; margin: 0 0 6px; }
.brand-strip__desc { font-size: 14.5px; color: var(--c-ink-3); margin: 0; line-height: 1.85; }

/* ---- CTA section ---- */
.cta-block { text-align: center; max-width: 720px; margin: 0 auto; }
.cta-block h2 { margin-bottom: 28px; }
.cta-block .actions { display: inline-flex; flex-direction: column; align-items: center; gap: 6px; }

/* ---- Footer ---- */
.site-footer {
  border-top: 1px solid var(--c-line);
  padding: 56px var(--pad-x) 40px;
  background: #fff;
}
.site-footer__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.site-footer__about p {
  font-size: 13.5px; color: var(--c-ink-3); margin: 12px 0 0; line-height: 1.85;
}
.site-footer__col h4 {
  font-family: var(--ff-en);
  font-size: 11px; font-weight: 500; letter-spacing: 0.32em; text-transform: uppercase;
  color: var(--c-ink-4);
  margin: 0 0 14px;
}
.site-footer__col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.site-footer__col a { font-size: 14px; color: var(--c-ink-2); }
.site-footer__col a:hover { color: var(--c-accent-d); }
.site-footer__copy {
  max-width: var(--maxw);
  margin: 40px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--c-line-2);
  font-family: var(--ff-en);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-ink-4);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
@media (max-width: 720px) {
  .site-footer__inner { grid-template-columns: 1fr; gap: 28px; }
}

/* ---- Page intro band ---- */
.page-head {
  padding: clamp(72px, 9vw, 120px) var(--pad-x) clamp(40px, 6vw, 72px);
  border-bottom: 1px solid var(--c-line);
  background: var(--c-bg-2);
}
.page-head .container { max-width: var(--maxw); }
.page-head h1 {
  font-size: clamp(28px, 3.6vw, 40px);
  margin-bottom: 18px;
}
.page-head .lead { max-width: 36em; }
.breadcrumb {
  font-family: var(--ff-en);
  font-size: 11px; letter-spacing: 0.24em; text-transform: uppercase;
  color: var(--c-ink-4);
  margin-bottom: 18px;
}
.breadcrumb a { color: var(--c-ink-4); }
.breadcrumb .sep { margin: 0 8px; }

/* ---- Misc ---- */
.divider {
  height: 1px; background: var(--c-line);
  max-width: var(--maxw); margin: 0 auto;
}
.text-link {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px;
  color: var(--c-accent-d);
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}
.text-link:hover { color: var(--c-ink); }

.anchor-list {
  list-style: none; margin: 0 0 32px; padding: 0;
  display: flex; flex-wrap: wrap; gap: 8px;
}
.anchor-list a {
  font-size: 13px;
  padding: 8px 14px;
  border: 1px solid var(--c-line);
  color: var(--c-ink-3);
  border-radius: 2px;
}
.anchor-list a:hover { border-color: var(--c-accent); color: var(--c-accent-d); }

/* ---- d-pc helper ---- */
@media (max-width: 880px) {
  .d-pc { display: none; }
}