/* www.rmthreat.com — rmthreat family home.
   The "house" page: core family washi-paper system (see docs/design.md),
   Fraunces display + Hanken Grotesk body, family coral #DD5238 + blue #1366E0.
   Each product card carries its own crest in its own accent. */

:root {
  --paper: #FAF5EC; --paper2: #F3ECDD; --bg: #FFFFFF; --surface-warm: #FFFDF8;
  --ink: #23252E; --grey: #5E6170; --ink3: #8E909B;
  --border: #ECE3D2; --border2: #E0D5BF;
  --primary: #1366E0; --primary-ink: #0B3D8C; --primary-soft: #E8F0FC;
  --coral: #DD5238; --coral-ink: #8C2C19; --coral-soft: #FBEAE4;
  --safe: #1C9C68; --safe-soft: #E4F4EC;
  /* per-product accents (for card trim) */
  --sekisho: #1366E0; --metsuke: #DD5238; --kai: #C8341A;
  --dark: #21242E; --dark2: #191B23; --on-dark: #EFE9DC; --on-dark-mute: #A7A498; --on-dark-border: rgba(255,255,255,.10);
  --r-sm: 10px; --r-md: 14px; --r-lg: 18px;
  --shadow-sm: 0 6px 18px -12px rgba(74,54,28,.40);
  --shadow: 0 16px 40px -22px rgba(74,54,28,.45), 0 2px 6px -3px rgba(74,54,28,.16);
  --shadow-lg: 0 36px 70px -30px rgba(74,54,28,.50), 0 6px 16px -10px rgba(74,54,28,.20);
  --maxw: 1080px;
  --serif: "Fraunces", Georgia, "Songti TC", "Hiragino Mincho ProN", "Noto Serif CJK TC", serif;
  --sans: "Hanken Grotesk", system-ui, -apple-system, "Hiragino Sans", "PingFang TC", "Microsoft JhengHei", "Noto Sans CJK TC", "Noto Sans CJK JP", sans-serif;
  --mono: ui-monospace, Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; font-family: var(--sans); color: var(--ink); line-height: 1.62;
  background:
    radial-gradient(1100px 560px at 86% -8%, #FFF6E4, transparent 60%),
    radial-gradient(820px 520px at -6% 6%, #FCF8F0, transparent 55%),
    var(--paper);
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { max-width: 100%; display: block; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* header */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(250,245,236,.82); backdrop-filter: saturate(150%) blur(14px); -webkit-backdrop-filter: saturate(150%) blur(14px); border-bottom: 1px solid var(--border); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.brand { display: flex; align-items: center; gap: 11px; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand img { width: 30px; height: 30px; }
.brand-name { font-family: var(--serif); font-size: 20px; font-weight: 600; letter-spacing: -.01em; }
.brand-name .dot { color: var(--coral); }
.nav-links { display: flex; align-items: center; gap: 24px; }
.nav-links a:not(.btn) { color: var(--grey); font-size: 14.5px; font-weight: 500; }
.nav-links a:not(.btn):hover { color: var(--ink); text-decoration: none; }
.gh { display: inline-flex; align-items: center; gap: 7px; }
.gh svg { width: 17px; height: 17px; }

/* langsel */
.langsel { position: relative; }
.langsel-trigger { display: inline-flex; align-items: center; gap: 6px; font-family: inherit; font-size: 14px; font-weight: 500; color: var(--grey); background: var(--surface-warm); border: 1px solid var(--border2); border-radius: 999px; padding: 7px 12px; cursor: pointer; transition: .15s; }
.langsel-trigger:hover { color: var(--ink); border-color: var(--ink3); }
.langsel-trigger .chev { transition: transform .18s ease; opacity: .8; }
.langsel-trigger[aria-expanded="true"] { color: var(--primary); border-color: var(--primary); background: var(--primary-soft); }
.langsel-trigger[aria-expanded="true"] .chev { transform: rotate(180deg); }
.langsel-menu { position: absolute; top: calc(100% + 8px); right: 0; min-width: 150px; list-style: none; margin: 0; padding: 6px; background: var(--bg); border: 1px solid var(--border); border-radius: var(--r-sm); box-shadow: var(--shadow); z-index: 60; animation: pop .16s ease-out; }
.langsel-menu[hidden] { display: none; }
.langsel-menu li { display: flex; align-items: center; justify-content: space-between; padding: 9px 12px; font-size: 14px; border-radius: 7px; cursor: pointer; }
.langsel-menu li:hover { background: var(--paper2); }
.langsel-menu li.active { color: var(--primary); font-weight: 600; }
.langsel-menu li.active::after { content: "✓"; font-size: 13px; color: var(--primary); }
@keyframes pop { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: translateY(0); } }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-family: var(--sans); font-size: 15px; font-weight: 600; padding: 12px 22px; border-radius: 999px; border: 1px solid transparent; cursor: pointer; transition: background .15s, transform .08s, border-color .15s, color .15s; }
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 14px 26px -14px rgba(19,102,224,.7); }
.btn-primary:hover { background: var(--primary-ink); transform: translateY(-1px); }
.btn-ghost { background: var(--surface-warm); color: var(--ink); border-color: var(--border2); }
.btn-ghost:hover { background: var(--bg); border-color: var(--ink3); }
.btn svg { width: 18px; height: 18px; }

/* hero */
.hero { padding: 92px 0 70px; text-align: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-family: var(--mono); font-size: 12px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--coral-ink); background: var(--coral-soft); border: 1px solid #F1C9BF; padding: 6px 14px; border-radius: 999px; }
.hero h1 { font-family: var(--serif); font-size: 52px; line-height: 1.08; font-weight: 600; letter-spacing: -.025em; margin: 22px auto 16px; max-width: 16ch; color: var(--ink); }
.hero p.lead { font-size: 19px; color: var(--grey); margin: 0 auto 30px; max-width: 56ch; }
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* products */
.products { padding: 30px 0 80px; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 44px; }
.section-head .cap { font-family: var(--mono); font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--coral); display: block; margin-bottom: 12px; }
.section-head h2 { font-family: var(--serif); font-size: 32px; font-weight: 600; letter-spacing: -.02em; margin: 0 0 10px; }
.section-head p { font-size: 16.5px; color: var(--grey); margin: 0; }
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.pcard { position: relative; overflow: hidden; display: flex; flex-direction: column; background: var(--bg); border: 1px solid var(--border); border-radius: var(--r-lg); box-shadow: var(--shadow-sm); padding: 26px 24px; transition: box-shadow .18s, transform .18s; }
/* fading top accent instead of a solid single-side bar (see docs/design.md §5) */
.pcard::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 2px; background: linear-gradient(90deg, transparent, var(--accent, var(--coral)), transparent); opacity: .85; }
.pcard:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
.pcard .crest { width: 56px; height: 56px; margin-bottom: 16px; }
.pcard .pname { font-family: var(--serif); font-size: 21px; font-weight: 600; }
.pcard .pname .jp { margin-right: 7px; }
.pcard .role { font-family: var(--mono); font-size: 11px; letter-spacing: .04em; text-transform: uppercase; color: var(--accent, var(--coral)); margin: 4px 0 12px; }
.pcard p { font-size: 14.5px; color: var(--grey); margin: 0 0 16px; flex: 1; }
.pcard .stops { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }
.pcard .chip { font-size: 11.5px; color: var(--ink); background: var(--paper2); border: 1px solid var(--border); border-radius: 999px; padding: 3px 10px; }
.pcard .plinks { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding-top: 14px; border-top: 1px solid var(--border); }
.pcard .visit { font-weight: 600; font-size: 14px; color: var(--accent, var(--coral)); }
.pcard .visit:hover { text-decoration: none; }
.pcard .src { display: inline-flex; align-items: center; gap: 5px; font-size: 13px; color: var(--ink3); }
.pcard .src:hover { color: var(--ink); text-decoration: none; }
.pcard .src svg { width: 15px; height: 15px; }

/* principles */
.principles { background: var(--paper2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.prin-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.prin { text-align: center; padding: 8px; }
.prin .pi { width: 44px; height: 44px; margin: 0 auto 12px; border-radius: 12px; background: var(--primary-soft); color: var(--primary); display: flex; align-items: center; justify-content: center; }
.prin h3 { font-family: var(--serif); font-size: 16.5px; font-weight: 600; margin: 0 0 5px; }
.prin p { font-size: 13.5px; color: var(--grey); margin: 0; }

/* footer */
.site-footer { background: var(--dark2); color: var(--on-dark-mute); padding: 60px 0 38px; }
.footer-grid { display: flex; justify-content: space-between; gap: 52px; flex-wrap: wrap; padding-bottom: 36px; border-bottom: 1px solid var(--on-dark-border); }
.footer-brand { max-width: 300px; }
.footer-brand .brand { color: #fff; margin-bottom: 13px; }
.footer-brand .brand-name { color: #fff; }
.footer-brand p { margin: 0; color: var(--on-dark-mute); font-size: 13.5px; line-height: 1.65; }
.footer-cols { display: flex; gap: 56px; flex-wrap: wrap; }
.footer-col h5 { margin: 0 0 13px; font-family: var(--mono); font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: var(--on-dark); }
.footer-col a { display: block; color: var(--on-dark-mute); margin-bottom: 10px; font-size: 14px; }
.footer-col a:hover { color: #fff; text-decoration: none; }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; padding-top: 24px; font-size: 12.5px; }
.footer-bottom .mono { font-family: var(--mono); }

/* responsive */
@media (max-width: 880px) {
  .hero { padding: 56px 0 50px; }
  .hero h1 { font-size: 38px; }
  .product-grid { grid-template-columns: 1fr; max-width: 440px; margin: 0 auto; }
  .prin-grid { grid-template-columns: repeat(2, 1fr); gap: 24px 16px; }
  .nav-links { gap: 14px; }
  .nav-links a.hide-sm { display: none; }
  .section-head h2 { font-size: 27px; }
}
@media (max-width: 520px) {
  .nav { height: auto; flex-wrap: wrap; gap: 10px; padding: 12px 0; }
  .hero h1 { font-size: 32px; }
}