/* =========================================================
   Wellry — 1ページ完結型コーポレートサイト
   Variant B「書店の光」を基準にした最終実装

   Section order:
     Hero → Issue → About → Difference → Process → Works
     → Corporate Program → Contact → News Releases → Founder
   ========================================================= */

:root {
  /* Base — ivory / cream / paper */
  --ivory:      #F7F3EA;
  --cream:      #FBF8F1;
  --paper:      #EFEAE0;
  --paper-2:    #E6DFD1;

  /* Green — deep + sage */
  --green:      #2E4A3B;
  --green-deep: #223829;
  --green-soft: #486A54;
  --sage:       #8FA48E;
  --sage-pale:  #B9C6B4;

  /* Accents */
  --orange:     #C97A4A;
  --terracotta: #B96A44;
  --gold:       #C9A85E;
  --gold-pale:  #E3CE9C;

  /* Text */
  --ink:        #2A2926;
  --ink-2:      #4A4744;
  --muted:      #6B6862;
  --muted-2:    #928E86;
  --line:       #D9D2C1;
  --line-soft:  #E7E0CE;

  /* Type */
  --sans:  "Zen Kaku Gothic New", "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  --serif: "Shippori Mincho", "Noto Serif JP", "Hiragino Mincho ProN", serif;
  --mono:  "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --hand:  "Klee One", "Kaisei Decol", cursive;

  --r-sm: 4px;
  --r-md: 8px;

  --ease: cubic-bezier(.22,.61,.36,1);
  --header-h: 70px;
}

/* ---------------- Reset / base ---------------- */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--cream);
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
  text-rendering: geometricPrecision;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}
body {
  font-feature-settings: "palt";
  overflow-x: hidden;
}
::selection { background: var(--green); color: var(--ivory); }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

section[id] { scroll-margin-top: var(--header-h); }

/* Page fade on load */
body { animation: pageFade .7s var(--ease); }
@keyframes pageFade { from { opacity: 0 } to { opacity: 1 } }
@media (prefers-reduced-motion: reduce) { body { animation: none; } }

/* ---------------- Typography helpers ---------------- */
.serif { font-family: var(--serif); letter-spacing: 0.04em; }
.mono  { font-family: var(--mono); letter-spacing: 0; }
.hand  { font-family: var(--hand); }

.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--green);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 24px; height: 1px; background: currentColor;
  display: inline-block;
}
.eyebrow-jp {
  font-size: 12px;
  letter-spacing: 0.32em;
  color: var(--green);
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.eyebrow-jp::before {
  content: "";
  width: 28px; height: 1px; background: currentColor;
}

/* ---------------- Layout wrappers ---------------- */
.wrap        { max-width: 1200px; margin: 0 auto; padding: 0 40px; }
.wrap-narrow { max-width: 880px;  margin: 0 auto; padding: 0 40px; }
.wrap-wide   { max-width: 1360px; margin: 0 auto; padding: 0 40px; }

.section     { padding: 120px 0; position: relative; }
.section-sm  { padding: 96px 0; }
.section-lg  { padding: 160px 0; }

/* ---------------- Buttons ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 16px 26px;
  border-radius: 999px;
  font-size: 14px;
  letter-spacing: 0.08em;
  transition: all .3s var(--ease);
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  min-height: 48px;
}
.btn .arr {
  width: 22px; height: 1px; background: currentColor;
  position: relative;
  transition: width .3s var(--ease);
}
.btn .arr::after {
  content: "";
  position: absolute;
  right: 0; top: -3px;
  width: 7px; height: 7px;
  border-top: 1px solid currentColor;
  border-right: 1px solid currentColor;
  transform: rotate(45deg);
}
.btn:hover .arr { width: 32px; }

.btn-primary   { background: var(--green); color: var(--ivory); }
.btn-primary:hover { background: var(--green-deep); }
.btn-secondary { background: transparent; color: var(--green); border-color: var(--green); }
.btn-secondary:hover { background: var(--green); color: var(--ivory); }
.btn-onDark {
  background: transparent; color: var(--ivory);
  border: 1px solid color-mix(in oklab, var(--ivory) 60%, transparent);
}
.btn-onDark:hover { background: var(--ivory); color: var(--green-deep); }

/* ---------------- Header ---------------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--header-h);
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: color-mix(in oklab, var(--cream) 85%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}
.site-header.scrolled {
  border-bottom-color: var(--line-soft);
  background: color-mix(in oklab, var(--cream) 92%, transparent);
}
.site-header .brand {
  font-family: var(--serif);
  font-size: 20px;
  letter-spacing: 0.14em;
  color: var(--green);
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.site-header .brand small {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.2em;
}
.site-nav {
  display: flex; align-items: center;
  gap: 28px;
  font-size: 13px;
  color: var(--ink-2);
}
.site-nav a { position: relative; padding: 6px 0; transition: color .2s var(--ease); }
.site-nav a:hover { color: var(--green); }
.site-nav a.is-active { color: var(--green); }
.site-nav a.is-active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 1px; background: var(--terracotta);
}
.site-nav .cta {
  padding: 10px 18px;
  border: 1px solid var(--green);
  color: var(--green);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.1em;
  transition: background .25s var(--ease), color .25s var(--ease);
}
.site-nav .cta:hover { background: var(--green); color: var(--ivory); }
.site-nav .cta.is-active::after { display: none; }

/* Hamburger */
.hamburger {
  display: none;
  width: 44px; height: 44px;
  align-items: center; justify-content: center;
  position: relative;
  z-index: 110;
}
.hamburger .bar {
  position: absolute; left: 12px;
  width: 20px; height: 1px;
  background: var(--ink);
  transition: transform .3s var(--ease), opacity .3s var(--ease), top .3s var(--ease);
}
.hamburger .bar:nth-child(1) { top: 17px; }
.hamburger .bar:nth-child(2) { top: 22px; }
.hamburger .bar:nth-child(3) { top: 27px; }
body.nav-open .hamburger .bar:nth-child(1) { top: 22px; transform: rotate(45deg); }
body.nav-open .hamburger .bar:nth-child(2) { opacity: 0; }
body.nav-open .hamburger .bar:nth-child(3) { top: 22px; transform: rotate(-45deg); }

/* Mobile nav overlay */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--cream);
  z-index: 90;
  padding: calc(var(--header-h) + 20px) 24px 40px;
  opacity: 0;
  transform: translateY(-10px);
  pointer-events: none;
  transition: opacity .3s var(--ease), transform .3s var(--ease);
  overflow-y: auto;
}
body.nav-open .mobile-nav {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
.mobile-nav ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.mobile-nav a {
  display: flex;
  align-items: baseline;
  gap: 20px;
  padding: 22px 4px;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--serif);
  font-size: 22px;
  color: var(--ink);
  letter-spacing: 0.08em;
  line-height: 1.4;
}
.mobile-nav a .num {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--terracotta);
  letter-spacing: 0.2em;
  min-width: 32px;
}
.mobile-nav .cta-block {
  margin-top: 36px;
  display: grid;
  gap: 12px;
}
.mobile-nav .cta-block .btn {
  width: 100%;
  justify-content: center;
}

@media (max-width: 900px) {
  .site-header { padding: 0 20px; }
  .site-nav { display: none; }
  .hamburger { display: flex; }
  .mobile-nav { display: block; }
  .site-header .brand { font-size: 18px; }
  .site-header .brand small { display: none; }
}

/* ---------------- Image placeholders ---------------- */
.ph {
  position: relative;
  background:
    repeating-linear-gradient(
      135deg,
      color-mix(in oklab, var(--paper) 92%, var(--sage-pale)) 0 12px,
      color-mix(in oklab, var(--paper) 96%, transparent) 12px 24px
    );
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  overflow: hidden;
  color: var(--muted);
}
.ph::before {
  content: attr(data-label);
  position: absolute;
  top: 14px; left: 14px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  background: color-mix(in oklab, var(--cream) 90%, transparent);
  padding: 4px 8px;
  border-radius: 2px;
  max-width: calc(100% - 28px);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.ph::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 30% 30%, color-mix(in oklab, var(--gold-pale) 30%, transparent), transparent 40%),
    radial-gradient(circle at 70% 70%, color-mix(in oklab, var(--sage-pale) 25%, transparent), transparent 40%);
  pointer-events: none;
}
.ph-dark {
  background:
    repeating-linear-gradient(135deg,
      color-mix(in oklab, var(--green) 85%, #000) 0 12px,
      color-mix(in oklab, var(--green) 78%, #000) 12px 24px);
  border-color: var(--green-deep);
  color: var(--sage-pale);
}
.ph-dark::before { background: color-mix(in oklab, var(--green-deep) 85%, transparent); color: var(--sage-pale); }
.ph img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.ph.has-img::before, .ph.has-img::after { display: none; }

/* ---------------- Note card (問いカード) ---------------- */
.note-card {
  background: var(--cream);
  border: 1px solid var(--line);
  padding: 22px 20px 20px;
  box-shadow: 0 1px 0 var(--paper-2), 0 12px 30px -20px rgba(46,74,59,.18);
  position: relative;
  font-family: var(--hand);
  color: var(--ink-2);
  font-size: 15px;
  line-height: 1.9;
  transform: rotate(-1.2deg);
  animation: noteFloat 7s ease-in-out infinite;
}
.note-card::before {
  content: "";
  position: absolute;
  top: 0; bottom: 0; left: 38px;
  width: 1px;
  background: color-mix(in oklab, var(--terracotta) 30%, transparent);
}
.note-card .q-mark {
  font-family: var(--serif);
  color: var(--terracotta);
  font-size: 22px;
  margin-right: 6px;
}
@keyframes noteFloat {
  0%,100% { transform: rotate(-1.2deg) translateY(0); }
  50%     { transform: rotate(-1.4deg) translateY(-4px); }
}
@media (prefers-reduced-motion: reduce) {
  .note-card { animation: none; }
}

/* ---------------- Reveal ---------------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: .08s; }
.reveal-delay-2 { transition-delay: .16s; }
.reveal-delay-3 { transition-delay: .24s; }
.reveal-delay-4 { transition-delay: .32s; }
.reveal-delay-5 { transition-delay: .40s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------------- Footer ---------------- */
.site-footer {
  background: var(--green-deep);
  color: var(--sage-pale);
  padding: 80px 40px 40px;
  font-size: 13px;
}
.site-footer a { color: var(--sage-pale); transition: color .2s var(--ease); }
.site-footer a:hover { color: var(--ivory); }
.site-footer .foot-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 60px;
  align-items: start;
}
.site-footer h4 {
  color: var(--ivory);
  font-size: 13px;
  letter-spacing: 0.2em;
  margin: 0 0 20px;
  font-weight: 500;
}
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.site-footer .brand-block .name {
  font-family: var(--serif);
  color: var(--ivory);
  font-size: 24px;
  letter-spacing: 0.2em;
  margin-bottom: 16px;
}
.site-footer .brand-block p {
  margin: 0;
  line-height: 1.9;
  color: color-mix(in oklab, var(--sage-pale) 85%, transparent);
}
.site-footer .foot-bottom {
  max-width: 1200px;
  margin: 60px auto 0;
  padding-top: 28px;
  border-top: 1px solid color-mix(in oklab, var(--sage-pale) 20%, transparent);
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: color-mix(in oklab, var(--sage-pale) 70%, transparent);
}
@media (max-width: 900px) {
  .site-footer { padding: 56px 20px 30px; }
  .site-footer .foot-grid { grid-template-columns: 1fr; gap: 30px; }
  .site-footer .foot-bottom { flex-direction: column; gap: 10px; margin-top: 40px; }
}