/* ============================================================
   DESIGN I — 和モダン (Wa Modern)
   Scoped entirely under .I. Washi ground, mincho headings,
   tategaki labels, hairline brand rules, generous "ma".
   Brand navy / gold used only via theme vars.
   ============================================================ */

.I {
  --wa-washi: #f6f3ec;      /* warm paper ground (neutral literal, OK) */
  --wa-washi-2: #efe9dc;    /* slightly deeper paper */
  --wa-mincho: "Shippori Mincho", var(--serif-jp);
  background: var(--wa-washi);
  color: var(--text);
  font-family: var(--sans-jp);
  padding-top: 0;           /* control bar removed (now bottom-right FAB) */
  overflow-x: hidden;
}

.I .wa-en {
  font-family: var(--display);
  letter-spacing: .34em;
  font-size: 12px;
  text-transform: uppercase;
  color: var(--accent);
}
.I .wa-en.small { font-size: 10.5px; letter-spacing: .28em; }
.I .wa-en.on { color: var(--accent-2); }

/* thin brand rule / gold hairline */
.I .wa-rule {
  width: 54px; height: 1px; margin: 26px 0;
  background: var(--accent);
}
.I .wa-rule.center { margin: 20px auto 0; }
.I .wa-hairline { height: 1px; background: var(--brand-line); }

/* tategaki (vertical writing) */
.I .wa-tate {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-family: var(--wa-mincho);
  letter-spacing: .28em;
  white-space: nowrap;
}

/* generic arrow */
.I .ar {
  display: inline-block; width: 20px; height: 1px; margin-left: 12px;
  background: currentColor; vertical-align: middle; position: relative;
}
.I .ar::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);
}

/* ---------------- header ---------------- */
.I .wa-header { padding: 0 46px; }
.I .wa-head-in {
  max-width: 1180px; margin: 0 auto;
  display: flex; align-items: center; gap: 30px;
  padding: 8px 0 22px;
}
.I .wa-brand { display: flex; align-items: center; gap: 14px; color: var(--brand); }
.I .wa-brand .name {
  font-family: var(--wa-mincho); font-weight: 600;
  font-size: 21px; letter-spacing: .08em; line-height: 1.2;
  color: var(--brand);
}
.I .wa-brand .name small {
  display: block; font-family: var(--display);
  font-size: 9px; letter-spacing: .4em; color: var(--accent);
  margin-top: 5px;
}
.I .wa-nav {
  margin-left: auto; display: flex; gap: 30px;
}
.I .wa-nav a {
  font-family: var(--wa-mincho); font-size: 14.5px;
  letter-spacing: .06em; color: var(--text); position: relative;
  padding-bottom: 4px; transition: color .25s;
}
.I .wa-nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 0; height: 1px; background: var(--accent); transition: width .3s;
}
.I .wa-nav a:hover { color: var(--brand); }
.I .wa-nav a:hover::after { width: 100%; }
.I .wa-head-tel { display: flex; align-items: center; gap: 10px; color: var(--brand); }
.I .wa-head-tel .num {
  font-family: var(--display); font-size: 19px;
  letter-spacing: .04em; color: var(--brand); font-weight: 600;
}
.I .wa-head-tel .hrs { font-size: 11px; color: var(--text-soft); letter-spacing: .04em; }

/* ---------------- hero ---------------- */
.I .wa-hero { padding: 74px 46px 96px; }
.I .wa-hero-in {
  max-width: 1180px; margin: 0 auto;
  display: grid; grid-template-columns: 1.02fr .98fr; gap: 56px; align-items: center;
}
.I .wa-eyebrow {
  font-family: var(--wa-mincho); font-size: 13px;
  letter-spacing: .12em; color: var(--text-soft); margin-bottom: 26px;
}
.I .wa-eyebrow .sp { color: var(--accent); margin: 0 10px; }
.I .wa-hero h1 {
  font-family: var(--wa-mincho); font-weight: 600;
  font-size: 40px; line-height: 1.7; letter-spacing: .06em;
  color: var(--brand);
}
.I .wa-lead {
  font-family: var(--wa-mincho); font-size: 15px;
  line-height: 2.2; color: var(--text-soft); letter-spacing: .04em;
}
.I .wa-btn {
  display: inline-flex; align-items: center;
  margin-top: 34px; font-family: var(--wa-mincho);
  font-size: 14px; letter-spacing: .1em; color: var(--brand);
}
.I .wa-btn .ar { transition: margin-left .25s; }
.I .wa-btn:hover .ar { margin-left: 18px; }

.I .wa-hero-art { position: relative; display: flex; justify-content: flex-end; align-items: stretch; }
.I .wa-tate-hero {
  font-size: 26px; color: var(--brand);
  align-self: center; margin-right: 30px;
  padding: 30px 0; border-top: 1px solid var(--accent); border-bottom: 1px solid var(--accent);
}
.I .wa-frame {
  position: relative; padding: 9px; background: #fff;
  border: 1px solid var(--brand-line);
  box-shadow: 0 22px 50px rgba(13, 24, 38, .12);
  flex: 1;
}
.I .wa-frame::after {
  content: ""; position: absolute; inset: 4px;
  border: 1px solid var(--accent-soft); pointer-events: none;
}
.I .wa-frame .ph { width: 100%; height: 440px; }
.I .wa-frame-tall .ph { height: 100%; min-height: 380px; }

/* ---------------- greeting / philosophy ---------------- */
.I .wa-intro { position: relative; padding: 104px 46px; background: var(--wa-washi-2); overflow: hidden; }
.I .wa-seigaiha {
  position: absolute; inset: 0; opacity: .10; pointer-events: none;
  background-image:
    radial-gradient(circle at 50% 100%, transparent 15px, var(--brand-line) 16px 17px, transparent 18px),
    radial-gradient(circle at 50% 100%, transparent 8px, var(--brand-line) 9px 10px, transparent 11px);
  background-size: 44px 22px; background-position: 0 0;
}
.I .wa-intro-in {
  position: relative; max-width: 1120px; margin: 0 auto;
  display: grid; grid-template-columns: auto 1fr .8fr; gap: 48px; align-items: center;
}
.I .wa-side { display: flex; justify-content: center; }
.I .wa-tate-label {
  font-size: 18px; color: var(--brand); letter-spacing: .5em;
  padding-left: 18px; border-left: 1px solid var(--accent);
}
.I .wa-intro-body h2 {
  font-family: var(--wa-mincho); font-weight: 600;
  font-size: 32px; line-height: 1.85; letter-spacing: .07em;
  color: var(--brand); margin: 16px 0 26px;
}
.I .wa-intro-body p {
  font-family: var(--wa-mincho); font-size: 15px;
  line-height: 2.4; color: var(--text-soft); letter-spacing: .03em;
  max-width: 30em;
}
.I .wa-sign { margin-top: 30px; display: flex; align-items: baseline; gap: 14px; }
.I .wa-sign .co {
  font-family: var(--wa-mincho); font-size: 16px;
  color: var(--brand); letter-spacing: .08em;
}
.I .wa-sign .en {
  font-family: var(--display); font-size: 11px;
  letter-spacing: .3em; color: var(--accent);
}
.I .wa-intro-art { align-self: stretch; }

/* ---------------- services ---------------- */
.I .wa-serv { padding: 106px 46px; }
.I .wa-sec-head { text-align: center; margin-bottom: 58px; }
.I .wa-sec-head h2 {
  font-family: var(--wa-mincho); font-weight: 600;
  font-size: 30px; letter-spacing: .14em; color: var(--brand); margin-top: 12px;
}
.I .wa-serv-grid {
  max-width: 1120px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px;
}
.I .wa-card {
  position: relative; display: flex; gap: 20px;
  background: #fff; border: 1px solid var(--brand-line);
  padding: 40px 32px 36px; transition: transform .3s, box-shadow .3s, border-color .3s;
}
.I .wa-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 26px 50px rgba(13, 24, 38, .12);
  border-color: var(--accent);
}
.I .wa-num {
  font-family: var(--wa-mincho);
  writing-mode: vertical-rl; text-orientation: upright;
  font-size: 20px; letter-spacing: .32em; color: var(--accent);
  padding-right: 18px; border-right: 1px solid var(--accent-soft);
}
.I .wa-card-in { flex: 1; }
.I .wa-ic { display: inline-flex; margin-bottom: 14px; opacity: .9; }
.I .wa-card h3 {
  font-family: var(--wa-mincho); font-weight: 600;
  font-size: 19px; letter-spacing: .06em; color: var(--brand); line-height: 1.6;
}
.I .wa-card .wa-en { margin: 8px 0 16px; }
.I .wa-card p {
  font-size: 13.5px; line-height: 2; color: var(--text-soft); letter-spacing: .02em;
}
.I .wa-more {
  display: inline-flex; align-items: center;
  font-family: var(--wa-mincho); font-size: 13px;
  letter-spacing: .08em; color: var(--brand);
}
.I .wa-card .wa-more { margin-top: 22px; }
.I .wa-more .ar { transition: margin-left .25s; }
.I .wa-card:hover .wa-more .ar { margin-left: 18px; }

/* ---------------- news ---------------- */
.I .wa-news { padding: 0 46px 106px; }
.I .wa-news-in { max-width: 1000px; margin: 0 auto; }
.I .wa-news-head {
  display: flex; align-items: baseline; gap: 22px;
  padding-bottom: 20px; border-bottom: 1px solid var(--brand-line);
}
.I .wa-news-head h2 {
  font-family: var(--wa-mincho); font-weight: 600;
  font-size: 24px; letter-spacing: .12em; color: var(--brand);
}
.I .wa-news-head .wa-more { margin-left: auto; }
.I .wa-news-head .wa-more:hover .ar { margin-left: 18px; }
.I .wa-news-row {
  display: flex; align-items: center; gap: 26px;
  padding: 24px 6px; border-bottom: 1px solid var(--brand-line);
  transition: background .25s, padding-left .25s;
}
.I .wa-news-row:hover { background: #fff; padding-left: 16px; }
.I .wa-news-row .date {
  font-family: var(--display); font-size: 15px;
  letter-spacing: .06em; color: var(--accent); min-width: 108px;
}
.I .wa-news-row .ttl {
  font-family: var(--wa-mincho); font-size: 15px;
  color: var(--text); letter-spacing: .04em; flex: 1;
}
.I .wa-news-row .chev { color: var(--brand-line); transition: color .25s, transform .25s; }
.I .wa-news-row:hover .chev { color: var(--accent); transform: translateX(4px); }

/* ---------------- contact band ---------------- */
.I .wa-contact {
  position: relative; overflow: hidden;
  background: var(--brand); color: var(--on-brand);
  padding: 96px 46px;
}
.I .wa-tate-contact {
  position: absolute; top: 50%; right: 40px; transform: translateY(-50%);
  font-size: 30px; letter-spacing: .6em;
  color: var(--on-brand); opacity: .07;
}
.I .wa-contact-in {
  position: relative; max-width: 1080px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center;
}
.I .wa-contact-head h2 {
  font-family: var(--wa-mincho); font-weight: 600;
  font-size: 30px; line-height: 1.6; letter-spacing: .08em;
  color: var(--on-brand); margin: 14px 0 18px;
}
.I .wa-contact-head p {
  font-size: 14px; line-height: 2.1; letter-spacing: .04em;
  color: rgba(255, 255, 255, .82);
}
.I .wa-contact-actions { display: flex; flex-direction: column; gap: 16px; }
.I .wa-cbtn {
  display: flex; align-items: center; gap: 18px; color: var(--accent-2);
  padding: 22px 26px; background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .18);
  transition: background .25s, border-color .25s;
}
.I .wa-cbtn:hover { background: rgba(255, 255, 255, .11); border-color: var(--accent-2); }
.I .wa-cbtn .big {
  display: block; font-family: var(--display); font-weight: 600;
  font-size: 27px; letter-spacing: .04em; color: var(--on-brand);
}
.I .wa-cbtn .lab {
  display: block; font-family: var(--wa-mincho);
  font-size: 17px; letter-spacing: .06em; color: var(--on-brand);
}
.I .wa-cbtn .sub { display: block; font-size: 11.5px; letter-spacing: .05em; color: rgba(255, 255, 255, .7); margin-top: 5px; }
.I .wa-cbtn.form .ar { margin-left: auto; color: var(--accent-2); }
.I .wa-cbtn.form:hover .ar { margin-left: auto; }

/* ---------------- responsive: 1280 down ---------------- */
@media (max-width: 1120px) {
  .I .wa-hero h1 { font-size: 34px; }
  .I .wa-tate-hero { font-size: 22px; margin-right: 20px; }
  .I .wa-intro-in { grid-template-columns: auto 1fr; }
  .I .wa-intro-art { display: none; }
  .I .wa-nav { gap: 20px; }
}

/* ---------------- responsive: mobile ≤720 (1 column) ---------------- */
@media (max-width: 720px) {
  .I { padding-top: 0; }

  .I .wa-header { padding: 0 20px; }
  .I .wa-head-in { flex-wrap: wrap; gap: 14px; padding-bottom: 16px; }
  .I .wa-nav { width: 100%; margin-left: 0; order: 3; flex-wrap: wrap; gap: 14px 18px; }
  .I .wa-nav a { font-size: 13.5px; }
  .I .wa-head-tel { margin-left: auto; }

  .I .wa-hero { padding: 44px 20px 64px; }
  .I .wa-hero-in { grid-template-columns: 1fr; gap: 40px; }
  .I .wa-hero h1 { font-size: 27px; line-height: 1.85; }
  .I .wa-hero-art { flex-direction: column; align-items: stretch; }
  /* tategaki back to horizontal so it never breaks on mobile */
  .I .wa-tate-hero {
    writing-mode: horizontal-tb; text-orientation: mixed;
    align-self: flex-start; margin: 0 0 18px; padding: 12px 0;
    font-size: 20px; letter-spacing: .18em; text-align: center; width: 100%;
  }
  .I .wa-frame .ph { height: 300px; }

  .I .wa-intro { padding: 64px 20px; }
  .I .wa-intro-in { grid-template-columns: 1fr; gap: 24px; }
  .I .wa-side { justify-content: flex-start; }
  .I .wa-tate-label {
    writing-mode: horizontal-tb; letter-spacing: .18em;
    padding: 0 0 0 14px; border-left: 2px solid var(--accent); font-size: 15px;
  }
  .I .wa-intro-body h2 { font-size: 25px; }
  .I .wa-intro-art { display: none; }

  .I .wa-serv { padding: 64px 20px; }
  .I .wa-sec-head { margin-bottom: 40px; }
  .I .wa-serv-grid { grid-template-columns: 1fr; gap: 18px; }
  .I .wa-card { padding: 30px 24px; }
  /* keep the vertical numeral but make cards safe on narrow screens */
  .I .wa-num { font-size: 17px; padding-right: 14px; }

  .I .wa-news { padding: 0 20px 64px; }
  .I .wa-news-row { gap: 4px 16px; flex-wrap: wrap; padding: 18px 4px; }
  .I .wa-news-row .date { min-width: 92px; font-size: 13.5px; }
  .I .wa-news-row .ttl { font-size: 14px; flex: 1 1 100%; order: 3; }
  .I .wa-news-row .chev { display: none; }

  .I .wa-contact { padding: 60px 20px; }
  .I .wa-contact-in { grid-template-columns: 1fr; gap: 28px; }
  .I .wa-contact-head h2 { font-size: 24px; }
  .I .wa-tate-contact { display: none; }
  .I .wa-cbtn .big { font-size: 23px; }
}