/* =========================================================
   Quaternary — 季刊 暮らしの研究室
   Shared stylesheet (multi-page editorial magazine)
   ========================================================= */

:root {
  --ink:         #14181F;          /* main text — near black */
  --ink-soft:    #3C424E;
  --ink-mute:    #6B7280;
  --ink-faint:   #9CA3AF;
  --paper:       #F7F4ED;          /* warm off-white (cream paper) */
  --paper-deep:  #ECE6D6;          /* slightly darker tone */
  --line:        #DAD3C0;          /* hairline */
  --line-soft:   #E8E2D0;
  --accent:      #1A3553;          /* deep ink-blue */
  --accent-deep: #102540;
  --accent-soft: #C7D3DE;
  --highlight:   #B89A4A;          /* aged gold for ornaments */
  --serif:       "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", "ＭＳ Ｐ明朝", serif;
  --serif-en:    "Cormorant Garamond", "EB Garamond", "Noto Serif JP", serif;
  --sans:        "Inter Tight", "Hiragino Kaku Gothic ProN", "Yu Gothic", system-ui, sans-serif;
  --hand:        "Klee One", "Yu Mincho", "Noto Serif JP", serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-weight: 400;
  line-height: 1.85;
  font-size: 15.5px;
  letter-spacing: .03em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  /* faint paper grain */
  background-image:
    radial-gradient(rgba(140, 120, 80, .035) 1px, transparent 1px),
    radial-gradient(rgba(140, 120, 80, .025) 1px, transparent 1px);
  background-size: 3px 3px, 7px 7px;
  background-position: 0 0, 1px 2px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: .5px; }

img { max-width: 100%; display: block; }
hr { border: 0; height: 1px; background: var(--line); margin: 40px 0; }

::selection { background: var(--accent); color: var(--paper); }

/* ----- Container ----- */
.q-wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 36px;
}
@media (max-width: 720px) { .q-wrap { padding: 0 20px; } }

/* ============================================================
   Header (magazine masthead)
   ============================================================ */
.q-header {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}
.q-masthead {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: end;
  padding: 28px 36px 14px;
  max-width: 1180px;
  margin: 0 auto;
  gap: 24px;
}
.q-masthead-left,
.q-masthead-right {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.q-masthead-right { text-align: right; }
.q-masthead-right .q-issue {
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid var(--ink);
  color: var(--ink);
  letter-spacing: .18em;
  font-weight: 500;
}
.q-logo {
  text-align: center;
  font-family: var(--serif-en);
  font-weight: 500;
  font-style: italic;
  font-size: 38px;
  letter-spacing: .04em;
  color: var(--ink);
  line-height: 1;
  text-decoration: none;
}
.q-logo:hover { text-decoration: none; }
.q-logo small {
  display: block;
  font-family: var(--serif);
  font-style: normal;
  font-weight: 500;
  font-size: 11px;
  letter-spacing: .42em;
  margin-top: 8px;
  color: var(--ink-soft);
}

.q-nav {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}
.q-nav-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.q-nav ul {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0;
}
.q-nav li a {
  display: block;
  padding: 14px 18px;
  font-family: var(--serif);
  font-size: 14px;
  color: var(--ink);
  letter-spacing: .15em;
  border-right: 1px solid var(--line-soft);
  position: relative;
}
.q-nav li:first-child a { border-left: 1px solid var(--line-soft); }
.q-nav li a:hover { background: var(--paper-deep); text-decoration: none; }
.q-nav li a.is-active::after {
  content: "";
  position: absolute;
  left: 18px; right: 18px; bottom: 6px;
  height: 1px;
  background: var(--accent);
}
.q-nav-meta {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--ink-mute);
  display: flex;
  align-items: center;
  gap: 16px;
}
.q-nav-meta .q-search {
  cursor: pointer;
  background: none;
  border: 0;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 0;
  font-family: inherit;
  letter-spacing: inherit;
  font-size: inherit;
}
.q-nav-meta .q-search svg { width: 14px; height: 14px; }
.q-burger { display: none; }

@media (max-width: 860px) {
  .q-masthead { grid-template-columns: 1fr; padding: 22px 20px 12px; gap: 8px; text-align: center; }
  .q-masthead-left, .q-masthead-right { text-align: center; }
  .q-nav-inner { padding: 0 20px; }
  .q-nav ul {
    display: none;
    position: absolute;
    left: 0; right: 0; top: 100%;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    z-index: 50;
  }
  .q-nav ul.is-open { display: flex; }
  .q-nav li a { border-right: 0; border-bottom: 1px solid var(--line-soft); padding: 14px 20px; }
  .q-nav li:first-child a { border-left: 0; }
  .q-nav { position: relative; }
  .q-burger {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: 0;
    color: var(--ink);
    font-family: var(--sans);
    font-size: 11px;
    letter-spacing: .22em;
    padding: 14px 0;
    cursor: pointer;
  }
  .q-burger span {
    display: inline-block;
    width: 18px; height: 1px; background: var(--ink);
    box-shadow: 0 -5px 0 var(--ink), 0 5px 0 var(--ink);
  }
}

/* ============================================================
   Breadcrumbs
   ============================================================ */
.q-crumbs {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ink-mute);
  padding: 18px 0;
}
.q-crumbs a { color: var(--ink-mute); }
.q-crumbs a:hover { color: var(--accent); }
.q-crumbs .sep { margin: 0 8px; opacity: .6; }

/* ============================================================
   Footer
   ============================================================ */
.q-footer {
  background: #0F1419;
  color: rgba(247, 244, 237, .72);
  padding: 64px 36px 28px;
  font-family: var(--serif);
}
.q-footer-inner {
  max-width: 1180px; margin: 0 auto;
}
.q-footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(247, 244, 237, .12);
}
.q-footer h4 {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: rgba(247, 244, 237, .55);
  margin: 0 0 18px;
  font-weight: 500;
}
.q-footer .q-foot-logo {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 28px;
  color: var(--paper);
  margin-bottom: 12px;
  letter-spacing: .04em;
}
.q-footer ul { list-style: none; margin: 0; padding: 0; }
.q-footer li { margin: 0 0 10px; font-size: 14px; }
.q-footer a { color: rgba(247, 244, 237, .72); }
.q-footer a:hover { color: var(--paper); }
.q-foot-news input {
  width: 100%;
  background: transparent;
  border: 0;
  border-bottom: 1px solid rgba(247, 244, 237, .25);
  color: var(--paper);
  font-family: var(--serif);
  font-size: 13px;
  padding: 8px 0;
  margin-top: 8px;
}
.q-foot-news input::placeholder { color: rgba(247, 244, 237, .35); }
.q-foot-bot {
  display: flex; justify-content: space-between; gap: 12px;
  padding-top: 22px;
  font-family: var(--sans);
  font-size: 10.5px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: rgba(247, 244, 237, .45);
}
@media (max-width: 860px) {
  .q-footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .q-foot-bot { flex-direction: column; gap: 8px; }
}
@media (max-width: 480px) {
  .q-footer-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   Page number / colophon stamp at page bottom
   ============================================================ */
.q-folio {
  display: flex; justify-content: space-between; align-items: baseline;
  border-top: 1px solid var(--line);
  padding: 16px 0 28px;
  font-family: var(--sans);
  font-size: 10.5px;
  letter-spacing: .25em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.q-folio strong { color: var(--ink); font-weight: 500; letter-spacing: .25em; }

/* ============================================================
   Reusable atoms
   ============================================================ */
.q-kicker {
  font-family: var(--sans);
  font-size: 10.5px;
  letter-spacing: .35em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  display: inline-block;
}
.q-divider {
  display: flex; align-items: center; gap: 14px;
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 18px;
  color: var(--highlight);
  margin: 56px 0 28px;
}
.q-divider::before, .q-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--line), transparent);
}
.q-section-title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: .14em;
  margin: 0;
}
.q-section-title em {
  font-family: var(--serif-en);
  font-style: italic;
  font-weight: 400;
  color: var(--ink-mute);
  letter-spacing: .04em;
  font-size: 17px;
  margin-left: 12px;
}

/* CSS-only "photo" — replicates layered editorial photography */
.q-photo {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 20% 10%, rgba(255, 240, 215, .55), transparent 60%),
    radial-gradient(80% 70% at 80% 80%, rgba(26, 53, 83, .35), transparent 65%),
    linear-gradient(135deg, #2A3340 0%, #51545A 40%, #8C8678 70%, #C8B98C 100%);
}
.q-photo::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.95' numOctaves='2'/><feColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 .08 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  mix-blend-mode: overlay;
  pointer-events: none;
}
.q-photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 50%, transparent 50%, rgba(0,0,0,.18) 100%);
  pointer-events: none;
}
.q-photo .q-caption {
  position: absolute;
  left: 14px; bottom: 14px;
  font-family: var(--hand);
  font-size: 12.5px;
  color: rgba(247, 244, 237, .92);
  background: rgba(20, 24, 31, .45);
  padding: 4px 10px;
  letter-spacing: .04em;
  -webkit-backdrop-filter: blur(4px);
          backdrop-filter: blur(4px);
}

/* photo theme variants */
.q-photo--soba {
  background:
    radial-gradient(110% 90% at 25% 15%, rgba(255, 232, 195, .5), transparent 60%),
    radial-gradient(90% 80% at 80% 85%, rgba(40, 30, 18, .55), transparent 65%),
    linear-gradient(160deg, #322820 0%, #594A35 35%, #9F8B66 70%, #D9C9A0 100%);
}
.q-photo--pottery {
  background:
    radial-gradient(100% 80% at 30% 20%, rgba(220, 225, 232, .6), transparent 55%),
    radial-gradient(85% 75% at 80% 80%, rgba(26, 53, 83, .55), transparent 65%),
    linear-gradient(150deg, #1F2A38 0%, #3D4858 40%, #7A8090 70%, #B8B6AE 100%);
}
.q-photo--cover {
  background:
    radial-gradient(120% 95% at 35% 25%, rgba(248, 240, 220, .5), transparent 60%),
    radial-gradient(85% 70% at 75% 75%, rgba(26, 53, 83, .6), transparent 65%),
    linear-gradient(165deg, #1A2335 0%, #3D4860 30%, #7E8076 60%, #B5A578 85%, #DCC78C 100%);
}
.q-photo--spring {
  background:
    radial-gradient(120% 85% at 25% 20%, rgba(255, 240, 220, .55), transparent 60%),
    radial-gradient(80% 75% at 80% 80%, rgba(98, 120, 92, .5), transparent 65%),
    linear-gradient(150deg, #3B4738 0%, #6C7458 40%, #ADA776 70%, #E2D2A4 100%);
}
.q-photo--travel {
  background:
    radial-gradient(120% 90% at 30% 25%, rgba(220, 230, 235, .55), transparent 60%),
    radial-gradient(85% 80% at 80% 80%, rgba(50, 65, 78, .55), transparent 65%),
    linear-gradient(155deg, #2A3138 0%, #57636A 40%, #8B9098 65%, #CDCCC4 100%);
}
.q-photo--craft {
  background:
    radial-gradient(110% 85% at 25% 20%, rgba(245, 220, 180, .5), transparent 55%),
    radial-gradient(85% 80% at 80% 85%, rgba(50, 25, 15, .55), transparent 65%),
    linear-gradient(160deg, #2B1E15 0%, #573D28 35%, #93724B 65%, #C9A877 100%);
}
.q-photo--note {
  background:
    radial-gradient(110% 80% at 30% 20%, rgba(255, 250, 230, .55), transparent 55%),
    radial-gradient(85% 70% at 80% 85%, rgba(170, 155, 95, .35), transparent 65%),
    linear-gradient(160deg, #B8AC8C 0%, #D3C5A0 35%, #E8DBB6 70%, #F1E8C9 100%);
}

/* ============================================================
   Article cards
   ============================================================ */
.q-card {
  display: block;
  color: var(--ink);
  text-decoration: none;
}
.q-card:hover { text-decoration: none; }
.q-card:hover .q-card-title { color: var(--accent); }
.q-card-thumb {
  width: 100%;
  aspect-ratio: 4 / 3;
}
.q-card-meta {
  font-family: var(--sans);
  font-size: 10.5px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 16px 0 10px;
  display: flex;
  gap: 12px;
}
.q-card-meta .q-num { color: var(--accent); font-weight: 600; }
.q-card-title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 19px;
  line-height: 1.55;
  margin: 0 0 10px;
  letter-spacing: .04em;
  transition: color .25s;
}
.q-card-lead {
  font-size: 13.5px;
  color: var(--ink-soft);
  line-height: 1.85;
  margin: 0;
}
.q-card-foot {
  font-family: var(--sans);
  font-size: 10.5px;
  letter-spacing: .18em;
  color: var(--ink-mute);
  margin-top: 12px;
}

/* utility */
.q-text-center { text-align: center; }