/* =========================================================
   埼玉起業家インタビュー — Media Site
   Design System: モノトーン / Noto Sans JP / 余白で構造を作る
   （StartWith Inc. コーポレートサイトのデザインを踏襲）
   ========================================================= */

/* ---------- Tokens ---------- */
:root {
  --color-paper: #ffffff;
  --color-ink: #0a0a0a;
  --color-text: #1a1a1a;
  --color-charcoal: #2a2a2a;
  --color-stone: #666666;
  --color-stone-light: #8a8a8a;
  --color-line: #d0d0d0;
  --color-line-light: #ececec;
  --color-mist: #f4f4f4;

  --font-jp: "Noto Sans JP", sans-serif;

  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 32px;
  --space-lg: 64px;
  --space-xl: 96px;
  --space-2xl: 128px;

  --container-max: 1080px;
  --container-pad: 32px;
  --header-h: 72px;

  --tracking-loose: 0.18em;
  --tracking-mid: 0.08em;
  --tracking-tight: 0.04em;
}

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: var(--header-h);
}
body {
  font-family: var(--font-jp);
  color: var(--color-text);
  background: var(--color-paper);
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 16px;
  line-height: 1.85;
  font-weight: 400;
  text-rendering: optimizeLegibility;
}
img,
svg {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
  transition: opacity 0.2s ease;
}
a:hover {
  opacity: 0.65;
}
a:focus-visible {
  outline: 2px solid var(--color-ink);
  outline-offset: 3px;
}
ul,
ol {
  list-style: none;
}
button {
  font-family: inherit;
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
}
p,
li {
  letter-spacing: 0.5px;
}

/* ---------- Container ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}
.container-narrow {
  max-width: 760px;
}

/* =========================================================
   Header
   ========================================================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--color-line-light);
  backdrop-filter: saturate(180%) blur(8px);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
}
.header-inner {
  height: 100%;
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 0 var(--container-pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-logo {
  font-size: 15px;
  font-weight: 400;
  letter-spacing: 0.15em;
  color: var(--color-ink);
}
.site-nav .nav-list {
  display: flex;
  align-items: center;
  gap: 36px;
}
.site-nav .nav-list a {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--color-charcoal);
  font-weight: 400;
  padding: 6px 0;
  display: inline-block;
}
.site-nav .nav-list a.nav-cta {
  background: var(--color-ink);
  color: #fff;
  padding: 10px 22px;
  letter-spacing: 0.18em;
}
.site-nav .nav-list a.nav-cta:hover {
  opacity: 0.85;
  color: #fff;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  position: relative;
}
.nav-toggle span {
  position: absolute;
  left: 8px;
  right: 8px;
  height: 1px;
  background: var(--color-ink);
  transition:
    transform 0.25s ease,
    opacity 0.2s ease,
    top 0.25s ease;
}
.nav-toggle span:nth-child(1) {
  top: 14px;
}
.nav-toggle span:nth-child(2) {
  top: 20px;
}
.nav-toggle span:nth-child(3) {
  top: 26px;
}
.nav-toggle.is-open span:nth-child(1) {
  top: 20px;
  transform: rotate(45deg);
}
.nav-toggle.is-open span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.is-open span:nth-child(3) {
  top: 20px;
  transform: rotate(-45deg);
}

.mobile-nav {
  position: fixed;
  inset: 0;
  height: 100vh;
  height: 100dvh;
  width: 100%;
  background: #fff;
  z-index: 99;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--header-h) var(--container-pad) 40px;
  overflow-y: auto;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
.mobile-nav.is-open {
  opacity: 1;
  pointer-events: auto;
}
.mobile-nav ul {
  width: 100%;
}
.mobile-nav li {
  border-bottom: 1px solid var(--color-line-light);
}
.mobile-nav li:first-child {
  border-top: 1px solid var(--color-line-light);
}
.mobile-nav a {
  display: block;
  padding: 24px 4px;
  font-size: 18px;
  letter-spacing: 0.14em;
  color: var(--color-ink);
}

/* =========================================================
   Sections
   ========================================================= */
main {
  padding-top: var(--header-h);
}
.section {
  padding: var(--space-xl) 0;
  position: relative;
}
.section + .section {
  border-top: 1px solid var(--color-line-light);
}
.section-num {
  font-size: 11px;
  letter-spacing: var(--tracking-loose);
  color: var(--color-stone);
  font-weight: 300;
  margin-bottom: 14px;
}
.section-title {
  font-size: 32px;
  font-weight: 300;
  letter-spacing: var(--tracking-tight);
  line-height: 1.5;
  color: var(--color-ink);
  margin-bottom: var(--space-md);
}
.section-sub {
  font-size: 14px;
  color: var(--color-stone);
  font-weight: 300;
  letter-spacing: var(--tracking-tight);
  margin-top: -16px;
  margin-bottom: var(--space-lg);
}
.section-cta {
  background: #f8f8f8;
}
.list-more {
  text-align: right;
  margin-top: var(--space-md);
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-ink);
  padding-bottom: 4px;
}
.text-link i {
  font-size: 12px;
  transition: transform 0.2s ease;
}
.text-link:hover {
  opacity: 1;
}
.text-link:hover i {
  transform: translateX(4px);
}

/* =========================================================
   Hero
   ========================================================= */
.hero {
  padding-top: calc(var(--header-h) + 56px);
  background-color: var(--color-paper);
}
.hero-inner {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 48px 64px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 64px;
}
.hero-title {
  font-size: 56px;
  font-weight: 200;
  letter-spacing: var(--tracking-tight);
  line-height: 1.4;
  color: var(--color-ink);
}
.hero-sub {
  flex-shrink: 0;
  max-width: 540px;
  white-space: nowrap;
  font-size: 16px;
  font-weight: 300;
  line-height: 2;
  color: var(--color-charcoal);
  letter-spacing: 0.06em;
}
.hero-visual {
  width: 100%;
}
.hero-visual img {
  width: 100%;
  height: clamp(280px, 32vw, 520px);
  object-fit: cover;
  object-position: center 32%;
}

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-jp);
  font-weight: 400;
  font-size: 13px;
  letter-spacing: 0.18em;
  padding: 16px 36px;
  border: 1px solid var(--color-ink);
  transition:
    opacity 0.2s ease,
    background 0.2s ease,
    color 0.2s ease;
}
.btn-primary {
  background: var(--color-ink);
  color: #fff;
}
.btn-primary:hover {
  opacity: 0.82;
}
.btn-secondary {
  background: #fff;
  color: var(--color-ink);
}
.btn-secondary:hover {
  background: var(--color-ink);
  color: #fff;
  opacity: 1;
}

/* =========================================================
   Category filter
   ========================================================= */
.kw-search {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 40px;
}
.kw-box {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 320px;
  max-width: 100%;
  border: 1px solid var(--color-line);
  padding: 11px 16px;
  transition: border-color 0.2s ease;
}
.kw-box:focus-within {
  border-color: var(--color-ink);
}
.kw-box i {
  color: var(--color-stone);
  font-size: 13px;
}
.kw-box input {
  flex: 1;
  min-width: 0;
  font-family: var(--font-jp);
  font-size: 14px;
  color: var(--color-ink);
  background: transparent;
  border: none;
  letter-spacing: 0.04em;
}
.kw-box input::placeholder {
  color: var(--color-stone-light);
}
.kw-box input:focus {
  outline: none;
}
.cat-filter {
  margin-bottom: var(--space-lg);
}
.cat-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 16px 0;
  border-top: 1px solid var(--color-line-light);
}
.cat-row:last-child {
  border-bottom: 1px solid var(--color-line-light);
}
.cat-row-label {
  font-size: 11px;
  letter-spacing: var(--tracking-loose);
  color: var(--color-stone);
  font-weight: 400;
  min-width: 84px;
}
.chip {
  border: 1px solid var(--color-line);
  padding: 5px 16px;
  font-size: 12px;
  letter-spacing: var(--tracking-tight);
  color: var(--color-stone);
  transition:
    background 0.2s ease,
    color 0.2s ease,
    border-color 0.2s ease;
}
.chip:hover {
  border-color: var(--color-ink);
  color: var(--color-ink);
  opacity: 1;
}
.chip.active {
  background: var(--color-ink);
  color: #fff;
  border-color: var(--color-ink);
}

/* =========================================================
   Post list (記事一覧)
   ========================================================= */
.post-list {
  border-top: 1px solid var(--color-line-light);
}
.post-item {
  border-bottom: 1px solid var(--color-line-light);
}
.post-link {
  display: grid;
  grid-template-columns: 132px 1fr auto;
  gap: 28px;
  align-items: baseline;
  padding: 28px 0;
}
.post-link:hover {
  opacity: 1;
}
.post-link:hover .post-title {
  color: var(--color-stone);
}
.post-date {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--color-stone);
  font-weight: 300;
}
.post-main {
  min-width: 0;
}
.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}
.tag {
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--color-charcoal);
  font-weight: 400;
  border: 1px solid var(--color-line);
  padding: 2px 10px;
}
.post-title {
  font-size: 19px;
  font-weight: 400;
  letter-spacing: var(--tracking-tight);
  line-height: 1.6;
  color: var(--color-ink);
  transition: color 0.2s ease;
}
.post-arrow {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--color-stone);
  white-space: nowrap;
}
.post-link.is-external .post-arrow::after {
  content: " ↗";
}
.post-link.is-internal .post-arrow::after {
  content: " →";
}
.post-source {
  font-size: 12px;
  color: var(--color-stone-light);
  margin-top: 8px;
}

/* =========================================================
   Support orgs
   ========================================================= */
.support-meta {
  font-size: 12px;
  color: var(--color-stone);
  margin-top: 6px;
  letter-spacing: 0.04em;
}

/* =========================================================
   Pitch / Accelerator
   ========================================================= */
.pitch-list {
  border-top: 1px solid var(--color-line-light);
}
.pitch-item {
  border-bottom: 1px solid var(--color-line-light);
  padding: 32px 0;
}
.pitch-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}
.pitch-name {
  font-size: 20px;
  font-weight: 400;
  letter-spacing: var(--tracking-tight);
  line-height: 1.5;
  color: var(--color-ink);
  margin-bottom: 12px;
}
.pitch-desc {
  font-size: 14px;
  line-height: 1.9;
  color: var(--color-charcoal);
  margin-bottom: 18px;
}
.pitch-meta {
  display: grid;
  gap: 8px;
  margin-bottom: 20px;
}
.pitch-meta > div {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 12px;
  align-items: baseline;
}
.pitch-meta dt {
  font-size: 11px;
  letter-spacing: var(--tracking-loose);
  color: var(--color-stone);
  font-weight: 400;
}
.pitch-meta dd {
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-charcoal);
}
.pitch-links {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
}
.pitch-links a {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-ink);
  padding-bottom: 3px;
}
.pitch-links a::after {
  content: " ↗";
}
.pitch-note {
  font-size: 13px;
  color: var(--color-stone);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}
@media (max-width: 767px) {
  .pitch-meta > div {
    grid-template-columns: 1fr;
    gap: 2px;
  }
}

/* =========================================================
   Article detail
   ========================================================= */
.article-head {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-md);
}
.breadcrumb {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--color-stone);
  margin-bottom: 28px;
}
.breadcrumb a {
  border-bottom: 1px solid transparent;
}
.breadcrumb a:hover {
  border-bottom-color: var(--color-stone);
}
.article-title {
  font-size: 34px;
  font-weight: 300;
  letter-spacing: var(--tracking-tight);
  line-height: 1.55;
  color: var(--color-ink);
  margin: 16px 0 20px;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 12px;
  color: var(--color-stone);
  letter-spacing: 0.08em;
}
.article-body {
  padding-bottom: var(--space-lg);
}
.article-body p {
  font-size: 16px;
  font-weight: 400;
  line-height: 2.05;
  color: var(--color-charcoal);
  margin-bottom: 28px;
  letter-spacing: 0.04em;
}
.article-body h2 {
  font-size: 22px;
  font-weight: 400;
  letter-spacing: var(--tracking-tight);
  color: var(--color-ink);
  margin: 48px 0 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-line-light);
}
.article-quote {
  border-left: 2px solid var(--color-ink);
  padding: 6px 0 6px 24px;
  margin: 36px 0;
  font-size: 19px;
  font-weight: 300;
  line-height: 1.9;
  color: var(--color-ink);
}
.interviewer {
  border: 1px solid var(--color-line-light);
  padding: 28px 30px;
  margin-top: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.interviewer .label {
  font-size: 11px;
  letter-spacing: var(--tracking-loose);
  color: var(--color-stone);
  margin-bottom: 10px;
}
.interviewer .org {
  font-size: 13px;
  color: var(--color-stone);
}
.interviewer .name {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: var(--tracking-tight);
}
.interviewer .sns {
  font-size: 12px;
  color: var(--color-stone);
  margin-top: 6px;
}
.interviewer .sns a {
  border-bottom: 1px solid var(--color-line);
}

.article-back {
  margin-top: var(--space-lg);
}

/* =========================================================
   Contact
   ========================================================= */
.contact-lead {
  font-size: 18px;
  font-weight: 400;
  line-height: 1.95;
  color: var(--color-ink);
  letter-spacing: var(--tracking-tight);
  margin-bottom: 36px;
}
.contact-meta {
  border-top: 1px solid var(--color-line);
  padding-top: 24px;
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 20px;
  align-items: baseline;
}
.contact-meta dt {
  font-size: 11px;
  letter-spacing: var(--tracking-loose);
  color: var(--color-stone);
  font-weight: 400;
}
.contact-meta dd {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: var(--tracking-tight);
  color: var(--color-ink);
}
.contact-meta a {
  border-bottom: 1px solid var(--color-ink);
  padding-bottom: 2px;
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  border-top: 1px solid var(--color-line-light);
  padding: 40px 0;
}
.site-footer .footer-inner {
  width: 90%;
  max-width: none;
  padding-left: 0;
  padding-right: 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}
.footer-link {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--color-stone);
  font-weight: 400;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition:
    border-color 0.2s ease,
    color 0.2s ease;
}
.footer-link:hover {
  border-bottom-color: var(--color-ink);
  color: var(--color-ink);
  opacity: 1;
}
.footer-copy {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--color-stone);
  font-weight: 300;
}

/* =========================================================
   Responsive
   ========================================================= */
/* タブレット以下：フッターは縦並びにし、コピーライトをメニューの下に */
@media (max-width: 1024px) {
  .footer-inner {
    flex-direction: column-reverse;
    align-items: flex-start;
    gap: 16px;
  }
}
@media (max-width: 1200px) {
  :root {
    --container-pad: 20px;
  }
  .site-nav {
    display: none;
  }
  .nav-toggle {
    display: block;
  }
  .header-inner {
    width: 100%;
    padding: 0 var(--container-pad);
  }
  .site-footer .footer-inner {
    width: 100%;
    padding: 0 var(--container-pad);
  }
  .hero {
    padding-top: calc(var(--header-h) + 32px);
  }
  .hero-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
    padding: 0 var(--container-pad) 40px;
  }
  .hero-title {
    font-size: 34px;
  }
  .hero-sub {
    max-width: none;
    white-space: normal;
  }
  .hero-visual img {
    height: clamp(220px, 56vw, 360px);
  }
  .section {
    padding: var(--space-lg) 0;
  }
  .section-title {
    font-size: 26px;
  }
  .kw-box {
    width: 100%;
  }
  .post-link {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 22px 0;
  }
  .post-arrow {
    justify-self: start;
  }
  .article-title {
    font-size: 26px;
  }
  .contact-meta {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .footer-inner {
    flex-direction: column-reverse;
    align-items: flex-start;
  }
}