/* ======================================================================
   ひとまき (hitomaki) — Design System
   Aesthetic: "Filmstrip Editorial — Kodak Yellow Sprocket Industrial"
   ----------------------------------------------------------------------
   Signature device:
     filmstrip perforation (sprocket holes) ruling — vertical/horizontal
     rails that thread navigation, chapter markers, and each product card
     as "one frame" of a 35mm reel.
   ----------------------------------------------------------------------
   Why this is NOT generic AI-slop:
     - Kodak yellow #FFB81C as DOMINANT (not creme/lavender/dark-amber)
     - paper white #FAFAF7 background (not pure white, not cream)
     - black perforation rule as repeating motif (subject-derived: 35mm reel)
     - Anton (camera lens engraving) for display
     - Special Elite (typewriter / lab darkroom slip) for chapter marks
       — first time across all 18 sites
     - Space Mono for numerals (frame indices, ISO numbers)
     - Noto Sans JP + DM Sans for body
     - NO Mincho / Apothecary / Broadsheet / Pixel-Neon / Black-Grid defaults
   ====================================================================== */

:root {
  /* === Color: Kodak yellow dominant + paper white + black perforation === */
  --paper:        #FAFAF7;  /* paper white (35mm leader paper feel) */
  --paper-warm:   #F5F2E8;  /* aged film envelope */
  --ink:          #1A1A1A;  /* perforation black, body text */
  --ink-soft:     #2D2D2D;
  --ink-mute:     #5A5A5A;
  --rule:         #1A1A1A;  /* perforation rule black */
  --rule-soft:    #DEDAC8;  /* light rule */

  /* Kodak yellow palette (dominant) */
  --kodak:        #FFB81C;  /* Kodak yellow (Pantone 116 cousin) */
  --kodak-deep:   #E8A100;  /* deeper for hover */
  --kodak-pale:   #FFE6A6;  /* pale for backgrounds */
  --kodak-wash:   #FFF6D9;  /* wash for surfaces */

  /* Accent: lab red (现像 stamp) — sparse */
  --stamp-red:    #B5251E;
  --stamp-red-mute: #8E1F1A;

  /* === Spacing rhythm: based on 35mm sprocket pitch (4.75mm ≈ 8px module) === */
  --gap-1:  8px;
  --gap-2:  16px;
  --gap-3:  24px;
  --gap-4:  32px;
  --gap-5:  48px;
  --gap-6:  64px;
  --gap-7:  96px;
  --gap-8:  128px;

  /* === Typography === */
  --f-display: "Anton", "Noto Sans JP", system-ui, sans-serif;       /* lens engraving */
  --f-stamp:   "Special Elite", "Courier New", monospace;            /* darkroom slip */
  --f-body:    "Noto Sans JP", "DM Sans", system-ui, sans-serif;     /* editorial body */
  --f-num:     "Space Mono", "Courier New", monospace;               /* frame indices */
  --f-eng:     "DM Sans", "Noto Sans JP", system-ui, sans-serif;     /* eng-leaning subhead */

  --max-w: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--f-body);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.65;
  font-size: 16px;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "palt" 1;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

/* ======================================================================
   PERFORATION SYSTEM — the signature
   ----------------------------------------------------------------------
   .perf-rule-h : horizontal sprocket rule (3px solid + repeating holes above/below)
   .perf-rule-v : vertical sprocket rule (used on filmstrip frames)
   ====================================================================== */

/* horizontal perforation rail (background of a thin black strip with holes) */
.perf-rail {
  position: relative;
  height: 22px;
  background:
    radial-gradient(circle at 12px 50%, var(--paper) 4px, transparent 4.5px) repeat-x,
    var(--ink);
  background-size: 24px 22px, auto;
}

/* thin double rule (frame counter style) */
.rule-double {
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  height: 5px;
}

/* single rule */
.rule-single { border-top: 1px solid var(--ink); }

/* ======================================================================
   PR / 開示 BANNER — fixed top
   ====================================================================== */
.pr-banner {
  background: var(--ink);
  color: var(--kodak);
  font-family: var(--f-stamp);
  font-size: 11px;
  letter-spacing: 0.18em;
  padding: 8px var(--gap-3);
  text-align: center;
  text-transform: uppercase;
  border-bottom: 1px solid var(--kodak);
}

/* ======================================================================
   HEADER / NAV
   ====================================================================== */
.site-header {
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--ink);
}
.site-header .nav-rail {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--gap-2) var(--gap-3);
  max-width: var(--max-w);
  margin: 0 auto;
}
.brand-mark {
  display: flex;
  align-items: baseline;
  gap: var(--gap-2);
}
.brand-mark .wordmark {
  font-family: var(--f-display);
  font-size: 28px;
  letter-spacing: 0.04em;
  color: var(--ink);
  line-height: 1;
  font-weight: 400;
  text-transform: uppercase;
}
.brand-mark .jp {
  font-family: var(--f-body);
  font-weight: 700;
  font-size: 14px;
  color: var(--ink);
  letter-spacing: 0.06em;
}
.brand-mark .tag-stamp {
  font-family: var(--f-stamp);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
  border-left: 1px solid var(--rule-soft);
  padding-left: var(--gap-2);
}

.nav-links { display: flex; gap: var(--gap-3); align-items: center; }
.nav-links a {
  font-family: var(--f-stamp);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ink);
  text-transform: uppercase;
  padding: 4px 8px;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s;
}
.nav-links a:hover { border-bottom-color: var(--kodak); }

/* ======================================================================
   HERO — Kodak yellow panel with engraved title
   ====================================================================== */
.hero {
  background: var(--kodak);
  position: relative;
  overflow: hidden;
  padding: var(--gap-7) var(--gap-3) var(--gap-6);
  border-bottom: 1px solid var(--ink);
}

/* perforation rail above hero (top edge) — mimicking film leader */
.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 22px;
  background:
    radial-gradient(circle at 12px 50%, var(--kodak) 4px, transparent 4.5px) repeat-x,
    var(--ink);
  background-size: 24px 22px, auto;
}
.hero::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 22px;
  background:
    radial-gradient(circle at 12px 50%, var(--paper) 4px, transparent 4.5px) repeat-x,
    var(--ink);
  background-size: 24px 22px, auto;
}

.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-frame-stamp {
  font-family: var(--f-stamp);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--ink);
  text-transform: uppercase;
  margin-bottom: var(--gap-3);
  display: inline-block;
  border: 1px solid var(--ink);
  padding: 6px 12px;
  background: var(--paper);
}

.hero h1 {
  font-family: var(--f-display);
  font-size: clamp(48px, 9vw, 120px);
  line-height: 0.92;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-transform: none;
  font-weight: 400;
  margin-bottom: var(--gap-3);
}
.hero h1 .jp {
  font-family: var(--f-body);
  font-weight: 900;
  font-size: 0.7em;
  letter-spacing: -0.02em;
  display: block;
  margin-top: 8px;
}

.hero-tagline {
  font-family: var(--f-stamp);
  font-size: clamp(18px, 2.4vw, 28px);
  color: var(--ink);
  letter-spacing: 0.02em;
  margin-bottom: var(--gap-4);
  max-width: 720px;
  line-height: 1.4;
}

.hero-lead {
  font-family: var(--f-body);
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 640px;
  margin-bottom: var(--gap-4);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-3);
  font-family: var(--f-num);
  font-size: 12px;
  color: var(--ink);
  letter-spacing: 0.06em;
  border-top: 1px solid var(--ink);
  padding-top: var(--gap-2);
  max-width: 720px;
}
.hero-meta span { display: inline-flex; align-items: center; gap: 6px; }
.hero-meta b { font-weight: 700; }

/* ======================================================================
   INTRO — author's hands-on framing ("私の最初は写るんです")
   ====================================================================== */
.intro {
  background: var(--paper);
  padding: var(--gap-6) var(--gap-3);
}
.intro-inner {
  max-width: 880px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--gap-5);
  align-items: start;
}
.intro-mark {
  font-family: var(--f-stamp);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--ink-mute);
  text-transform: uppercase;
  border-top: 2px solid var(--ink);
  padding-top: var(--gap-2);
}
.intro-mark .frame-num {
  font-family: var(--f-num);
  display: block;
  font-size: 36px;
  color: var(--ink);
  margin-top: var(--gap-2);
  letter-spacing: 0;
}
.intro-body p {
  font-size: 17px;
  line-height: 1.95;
  margin-bottom: var(--gap-3);
  color: var(--ink-soft);
}
.intro-body p strong {
  background: linear-gradient(180deg, transparent 65%, var(--kodak) 65%, var(--kodak) 92%, transparent 92%);
  font-weight: 700;
  padding: 0 2px;
}

/* ======================================================================
   LANE (chapter / section) — perforation rail + Special Elite chapter mark
   ====================================================================== */
.lane {
  padding: var(--gap-6) var(--gap-3) var(--gap-7);
  background: var(--paper);
  border-top: 1px solid var(--ink);
  position: relative;
}
.lane:nth-of-type(even) {
  background: var(--paper-warm);
}
.lane-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.lane-header {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: var(--gap-4);
  align-items: end;
  padding-bottom: var(--gap-4);
  border-bottom: 2px solid var(--ink);
  margin-bottom: var(--gap-5);
}
.lane-frame {
  font-family: var(--f-stamp);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ink-mute);
  text-transform: uppercase;
  text-align: left;
}
.lane-frame .num {
  font-family: var(--f-num);
  display: block;
  font-size: 56px;
  color: var(--ink);
  line-height: 1;
  margin-top: 4px;
  letter-spacing: -0.02em;
}
.lane-frame .num::after {
  content: "";
  display: block;
  width: 40px;
  height: 4px;
  background: var(--kodak);
  margin-top: 6px;
}

.lane-title-block { }
.lane-title-block .lane-label {
  font-family: var(--f-stamp);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--stamp-red-mute);
  text-transform: uppercase;
  margin-bottom: 8px;
  display: inline-block;
  border: 1px solid var(--stamp-red-mute);
  padding: 3px 9px;
  background: var(--paper);
}
.lane-title-block h2 {
  font-family: var(--f-display);
  font-size: clamp(34px, 5vw, 56px);
  letter-spacing: 0.01em;
  line-height: 1;
  color: var(--ink);
  font-weight: 400;
  text-transform: none;
}
.lane-title-block .motif {
  font-family: var(--f-stamp);
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
  margin-top: 8px;
  display: block;
}

.lane-description {
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 760px;
  margin-bottom: var(--gap-3);
}
.lane-intro {
  font-size: 15px;
  line-height: 1.95;
  color: var(--ink-soft);
  max-width: 760px;
  padding: var(--gap-3);
  background: var(--kodak-wash);
  border-left: 4px solid var(--kodak);
  margin-bottom: var(--gap-5);
}

/* ======================================================================
   FRAME GRID (product cards as filmstrip frames)
   ====================================================================== */
.frames {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--gap-4);
}

.frame {
  background: var(--paper);
  border: 1px solid var(--ink);
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: transform 0.18s, box-shadow 0.18s;
}
.frame:hover {
  transform: translateY(-2px);
  box-shadow: 6px 6px 0 0 var(--ink);
}

/* perforation strip across the top of each frame card */
.frame::before {
  content: "";
  display: block;
  height: 14px;
  background:
    radial-gradient(circle at 8px 50%, var(--paper) 3px, transparent 3.5px) repeat-x,
    var(--ink);
  background-size: 16px 14px, auto;
}

.frame-id {
  position: absolute;
  top: 22px;
  right: 14px;
  font-family: var(--f-num);
  font-size: 11px;
  color: var(--ink-mute);
  letter-spacing: 0.1em;
  z-index: 2;
  background: var(--paper);
  padding: 2px 6px;
  border: 1px solid var(--ink);
}

.frame-image {
  background: var(--paper-warm);
  padding: var(--gap-3);
  border-bottom: 1px solid var(--ink);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
}
.frame-image img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  mix-blend-mode: multiply;
}

.frame-body {
  padding: var(--gap-3);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.frame-ownership {
  font-family: var(--f-stamp);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 8px;
  display: inline-block;
  width: fit-content;
  padding: 2px 7px;
  border: 1px solid var(--ink-mute);
  color: var(--ink-mute);
}
.frame-ownership[data-own="hands-on"] {
  border-color: var(--ink);
  color: var(--ink);
  background: var(--kodak);
}
.frame-ownership[data-own="light"] {
  border-color: var(--ink-mute);
  color: var(--ink);
  background: var(--kodak-pale);
}

.frame-name {
  font-family: var(--f-body);
  font-weight: 700;
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink);
  margin-bottom: var(--gap-2);
  letter-spacing: 0.01em;
}
.frame-reason {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin-bottom: var(--gap-3);
  flex: 1;
}

.frame-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--ink);
  color: var(--kodak);
  font-family: var(--f-stamp);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 12px 16px;
  border: none;
  width: 100%;
  justify-content: center;
  transition: background 0.15s;
}
.frame-cta:hover { background: var(--stamp-red); }
.frame-cta::after {
  content: "→";
  font-family: var(--f-num);
  font-size: 14px;
  letter-spacing: 0;
}

/* ======================================================================
   FAQ — typewriter Q/A
   ====================================================================== */
.faq {
  padding: var(--gap-6) var(--gap-3);
  background: var(--paper-warm);
  border-top: 1px solid var(--ink);
}
.faq-inner {
  max-width: 880px;
  margin: 0 auto;
}
.faq-header {
  margin-bottom: var(--gap-5);
  padding-bottom: var(--gap-3);
  border-bottom: 2px solid var(--ink);
}
.faq-header .stamp {
  font-family: var(--f-stamp);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--stamp-red-mute);
  text-transform: uppercase;
  margin-bottom: 8px;
  display: block;
}
.faq-header h2 {
  font-family: var(--f-display);
  font-size: clamp(34px, 5vw, 52px);
  font-weight: 400;
  color: var(--ink);
  letter-spacing: 0.01em;
  line-height: 1;
}

.qa {
  border-bottom: 1px solid var(--ink);
  padding: var(--gap-4) 0;
}
.qa:last-child { border-bottom: none; }
.qa-q {
  font-family: var(--f-body);
  font-weight: 700;
  font-size: 17px;
  color: var(--ink);
  margin-bottom: var(--gap-2);
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.qa-q::before {
  content: "Q";
  font-family: var(--f-display);
  font-size: 28px;
  color: var(--kodak-deep);
  letter-spacing: 0;
  line-height: 1;
}
.qa-a {
  font-size: 15px;
  line-height: 1.95;
  color: var(--ink-soft);
  padding-left: 36px;
  position: relative;
}
.qa-a::before {
  content: "A";
  position: absolute;
  left: 0;
  top: -2px;
  font-family: var(--f-display);
  font-size: 22px;
  color: var(--ink-mute);
  line-height: 1;
}

/* ======================================================================
   FOOTER — darkroom slip
   ====================================================================== */
.site-footer {
  background: var(--ink);
  color: var(--paper);
  padding: var(--gap-6) var(--gap-3) var(--gap-4);
  border-top: 22px solid;
  border-image:
    radial-gradient(circle at 12px 50%, var(--ink) 4px, transparent 4.5px) repeat-x;
}
/* simpler perforation: layered approach */
.site-footer {
  position: relative;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -22px;
  left: 0;
  right: 0;
  height: 22px;
  background:
    radial-gradient(circle at 12px 50%, var(--paper-warm) 4px, transparent 4.5px) repeat-x,
    var(--ink);
  background-size: 24px 22px, auto;
  border-top: 0;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--gap-5);
  margin-bottom: var(--gap-5);
}
.footer-brand .wordmark {
  font-family: var(--f-display);
  font-size: 34px;
  color: var(--kodak);
  margin-bottom: var(--gap-2);
  display: block;
  letter-spacing: 0.04em;
}
.footer-brand .tagline {
  font-family: var(--f-stamp);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--paper-warm);
  margin-bottom: var(--gap-3);
}
.footer-brand p {
  font-size: 13px;
  line-height: 1.8;
  color: #b8b8b8;
}
.footer-col h4 {
  font-family: var(--f-stamp);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--kodak);
  margin-bottom: var(--gap-2);
  padding-bottom: 6px;
  border-bottom: 1px solid var(--kodak);
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 8px; }
.footer-col a {
  font-size: 13px;
  color: var(--paper-warm);
  border-bottom: 1px solid transparent;
}
.footer-col a:hover { border-bottom-color: var(--kodak); }

.footer-disclaimer {
  border-top: 1px solid #3a3a3a;
  padding-top: var(--gap-3);
  font-family: var(--f-stamp);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: #888;
  line-height: 1.7;
}
.footer-disclaimer .updated {
  display: inline-block;
  margin-right: var(--gap-3);
  color: var(--kodak);
  font-family: var(--f-num);
}

/* ======================================================================
   STATIC PAGES (about / contact / privacy / disclaimer)
   ====================================================================== */
.page {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--gap-6) var(--gap-3);
}
.page-header {
  border-bottom: 2px solid var(--ink);
  padding-bottom: var(--gap-3);
  margin-bottom: var(--gap-5);
}
.page-header .stamp {
  font-family: var(--f-stamp);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--stamp-red-mute);
  text-transform: uppercase;
  margin-bottom: 8px;
  display: block;
}
.page-header h1 {
  font-family: var(--f-display);
  font-size: clamp(40px, 6vw, 64px);
  letter-spacing: 0.01em;
  font-weight: 400;
  line-height: 1;
  color: var(--ink);
}
.page-body h2 {
  font-family: var(--f-display);
  font-size: 28px;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--ink);
  margin: var(--gap-5) 0 var(--gap-2);
  padding-top: var(--gap-2);
  border-top: 1px solid var(--ink);
}
.page-body p {
  font-size: 15.5px;
  line-height: 1.95;
  color: var(--ink-soft);
  margin-bottom: var(--gap-3);
}
.page-body ul {
  margin: var(--gap-2) 0 var(--gap-3) var(--gap-3);
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-soft);
}
.page-body li { margin-bottom: 8px; }
.page-body a {
  border-bottom: 1px solid var(--kodak-deep);
  color: var(--ink);
}

/* ======================================================================
   RESPONSIVE
   ====================================================================== */
@media (max-width: 768px) {
  .site-header .nav-rail {
    flex-wrap: wrap;
    gap: var(--gap-2);
  }
  .brand-mark .tag-stamp { display: none; }
  .nav-links { gap: var(--gap-2); }
  .nav-links a { font-size: 10px; padding: 4px 4px; }

  .hero { padding: var(--gap-6) var(--gap-3) var(--gap-5); }
  .hero h1 { font-size: clamp(40px, 12vw, 72px); }
  .hero-tagline { font-size: 18px; }

  .intro-inner {
    grid-template-columns: 1fr;
    gap: var(--gap-3);
  }
  .lane-header {
    grid-template-columns: 60px 1fr;
    gap: var(--gap-3);
  }
  .lane-frame .num { font-size: 40px; }
  .lane-title-block h2 { font-size: 32px; }

  .frames { grid-template-columns: 1fr; }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--gap-4);
  }
}

@media (max-width: 480px) {
  .brand-mark .wordmark { font-size: 22px; }
  .brand-mark .jp { font-size: 12px; }
  .hero h1 { font-size: clamp(36px, 13vw, 60px); }
  .hero-lead { font-size: 15px; }
  .lane-frame .num { font-size: 32px; }
  .lane-title-block h2 { font-size: 28px; }
}