@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700;900&family=Inter:wght@400;500;600;700;800&display=swap');

/* =========================================================
   FOUNTEC Renewal Proposal — Design System
   Brand: Deep Green × Deep Navy × White (refined industrial)
   Fonts: Noto Sans JP (JP) / Inter (numerals & latin)
   ========================================================= */

:root {
  /* --- Brand tokens (locked) --- */
  --navy:        #13294B;
  --navy-deep:   #0C1C36;
  --green:       #1F7A4D;
  --green-deep:  #155C38;
  --ink:         #1A2230;
  --muted:       #5B6770;
  --surface:     #F4F6F5;
  --border:      #E2E8E5;
  --white:       #FFFFFF;

  /* --- Derived --- */
  --green-tint:  rgba(31,122,77,.08);
  --navy-tint:   rgba(19,41,75,.06);
  --shadow-sm:   0 1px 2px rgba(12,28,54,.06), 0 2px 8px rgba(12,28,54,.05);
  --shadow-md:   0 6px 18px rgba(12,28,54,.10), 0 2px 6px rgba(12,28,54,.06);
  --shadow-lg:   0 18px 40px rgba(12,28,54,.16);

  /* --- Type --- */
  --font-jp: "Noto Sans JP", system-ui, sans-serif;
  --font-num: "Inter", "Noto Sans JP", sans-serif;

  /* --- Layout --- */
  --maxw: 1160px;
  --gutter: clamp(20px, 5vw, 48px);
  --radius: 12px;
  --radius-sm: 8px;
  --header-h: 76px;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-jp);
  color: var(--ink);
  background: var(--white);
  line-height: 1.8;
  font-weight: 400;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--green); text-decoration: none; transition: color .2s; }
a:hover { color: var(--green-deep); text-decoration: underline; }
h1,h2,h3,h4 { color: var(--navy); line-height: 1.35; margin: 0; font-weight: 900; letter-spacing: .02em; }
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; list-style: none; }
.num { font-family: var(--font-num); font-feature-settings: "tnum" 1; }

/* --- Layout helpers --- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding-inline: var(--gutter); }
.section { padding: clamp(56px, 8vw, 104px) 0; }
.section--surface { background: var(--surface); }
.section--navy { background: var(--navy); color: rgba(255,255,255,.86); }
.section--navy h1, .section--navy h2, .section--navy h3 { color: #fff; }

/* --- Section heading kit (eyebrow + title + rule) --- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-num); font-weight: 700; font-size: .8rem;
  letter-spacing: .18em; text-transform: uppercase; color: var(--green);
}
.eyebrow::before { content:""; width: 28px; height: 2px; background: var(--green); }
.sec-title { font-size: clamp(1.5rem, 3.4vw, 2.3rem); margin: 14px 0 0; }
.sec-lead { color: var(--muted); max-width: 60ch; margin-top: 14px; }
.sec-head { margin-bottom: clamp(32px, 5vw, 56px); }

/* =========================================================
   Header / Nav
   ========================================================= */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-header__inner {
  max-width: var(--maxw); margin: 0 auto; padding-inline: var(--gutter);
  height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand svg { height: 52px; width: auto; display: block; }
.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  color: var(--navy); font-weight: 700; font-size: .92rem;
  padding: 10px 12px; border-radius: var(--radius-sm);
  position: relative; transition: background .2s, color .2s;
}
.nav a:hover { background: var(--green-tint); color: var(--green-deep); text-decoration: none; }
.nav a[aria-current="page"] { color: var(--green-deep); }
.nav a[aria-current="page"]::after {
  content:""; position:absolute; left:12px; right:12px; bottom:4px; height:2px; background: var(--green);
}
.header-actions { display: flex; align-items: center; gap: 12px; }
.lang { display: inline-flex; border: 1px solid var(--border); border-radius: 999px; overflow: hidden; font-family: var(--font-num); }
.lang span, .lang a { padding: 4px 12px; font-size: .78rem; font-weight: 600; }
.lang .on { background: var(--navy); color: #fff; }
.lang .off { color: var(--muted); }

/* --- CTA buttons --- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: .92rem; line-height: 1;
  padding: 13px 22px; border-radius: 999px; border: 1px solid transparent;
  cursor: pointer; transition: transform .15s, box-shadow .2s, background .2s, color .2s;
  white-space: nowrap;
}
.btn--cta { background: var(--green); color: #fff; box-shadow: var(--shadow-sm); }
.btn--cta:hover { background: var(--green-deep); color: #fff; text-decoration: none; transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn--ghost { background: transparent; color: var(--navy); border-color: var(--border); }
.btn--ghost:hover { border-color: var(--green); color: var(--green-deep); text-decoration: none; transform: translateY(-2px); }
.btn--light { background: #fff; color: var(--navy); }
.btn--light:hover { color: var(--green-deep); text-decoration: none; transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn--lg { padding: 16px 28px; font-size: 1rem; }
.btn svg { width: 16px; height: 16px; }

/* --- Hamburger --- */
.hamburger { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--navy); margin: 5px 0; transition: .3s; }
.nav-backdrop { display: none; }

/* =========================================================
   Hero
   ========================================================= */
.hero {
  position: relative; background: var(--navy); color: #fff; overflow: hidden;
}
.hero::before { /* blueprint grid */
  content:""; position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(120% 90% at 80% 10%, #000 30%, transparent 75%);
}
.hero::after { /* molten green glow */
  content:""; position:absolute; right:-10%; top:-20%; width:60%; height:140%;
  background: radial-gradient(closest-side, rgba(31,122,77,.45), transparent 70%);
  filter: blur(20px); pointer-events:none;
}
.hero__inner {
  position: relative; z-index: 1;
  max-width: var(--maxw); margin: 0 auto; padding: clamp(56px,9vw,104px) var(--gutter);
  display: grid; grid-template-columns: 1.15fr .85fr; gap: clamp(32px,5vw,64px); align-items: center;
}
.hero__eyebrow { color: #8be0b0; }
.hero__eyebrow::before { background: #8be0b0; }
.hero h1 { color: #fff; font-size: clamp(2rem, 5.2vw, 3.6rem); line-height: 1.18; letter-spacing: .01em; }
.hero h1 .accent { color: #6ee7a8; }
.hero__sub { color: rgba(255,255,255,.78); font-size: clamp(1rem,1.6vw,1.2rem); margin-top: 22px; max-width: 36ch; }
.hero__cta { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; }

/* KPI badges */
.kpis { display: grid; grid-template-columns: repeat(2,1fr); gap: 1px; background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.12); border-radius: var(--radius); overflow: hidden; }
.kpi { background: var(--navy-deep); padding: 22px 20px; }
.kpi__num { font-family: var(--font-num); font-weight: 800; font-size: clamp(1.6rem,3vw,2.1rem); color: #fff; line-height: 1; }
.kpi__num small { font-size: .55em; font-weight: 700; color: #6ee7a8; margin-left: 2px; }
.kpi__label { font-size: .82rem; color: rgba(255,255,255,.62); margin-top: 8px; }

/* hero photo: subtle navy blend to tie into the dark hero */
.hero-shot { position: relative; }
.shot-grad { position: absolute; inset: 0; border-radius: var(--radius-sm); pointer-events: none;
  background: radial-gradient(120% 100% at 50% 0%, transparent 58%, rgba(12,28,54,.28)),
              linear-gradient(180deg, rgba(19,41,75,0) 60%, rgba(12,28,54,.30)); }

/* technical bracket frame for images */
.frame { position: relative; }
.frame::before, .frame::after {
  content:""; position:absolute; width: 26px; height: 26px; z-index: 2;
}
.frame::before { top:-1px; left:-1px; border-top: 2px solid var(--green); border-left: 2px solid var(--green); }
.frame::after { bottom:-1px; right:-1px; border-bottom: 2px solid var(--green); border-right: 2px solid var(--green); }

/* =========================================================
   Placeholder media
   ========================================================= */
.ph {
  position: relative; display: flex; flex-direction: column; gap: 8px;
  align-items: center; justify-content: center; text-align: center;
  background:
    repeating-linear-gradient(135deg, var(--green-tint) 0 12px, transparent 12px 24px),
    var(--surface);
  border: 1px dashed var(--border);
  color: var(--muted); border-radius: var(--radius-sm);
  aspect-ratio: 16/10; padding: 16px;
}
.ph svg { width: 34px; height: 34px; opacity: .5; }
.ph small { font-size: .78rem; letter-spacing: .04em; }
.ph[data-ratio="1/1"] { aspect-ratio: 1/1; }
.ph[data-ratio="4/3"] { aspect-ratio: 4/3; }
.ph[data-ratio="3/4"] { aspect-ratio: 3/4; }

/* =========================================================
   Cards / grids
   ========================================================= */
.grid { display: grid; gap: clamp(18px, 2.4vw, 28px); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; transition: transform .2s, box-shadow .25s, border-color .2s;
  position: relative;
}
.card::before { content:""; position:absolute; top:0; left:0; right:0; height:3px; background: var(--green); transform: scaleX(0); transform-origin: left; transition: transform .3s; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: #d3ddd7; }
.card:hover::before { transform: scaleX(1); }
.card__body { padding: 22px 22px 24px; }
.card__tag { font-family: var(--font-num); font-size: .72rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--green); }
.card__title { font-size: 1.15rem; margin: 8px 0 8px; }
.card__desc { color: var(--muted); font-size: .92rem; margin: 0 0 16px; }

/* feature value cards (home) */
.feature { padding: 28px; border: 1px solid var(--border); border-radius: var(--radius); background:#fff; transition: transform .2s, box-shadow .25s; }
.feature:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.feature__ico { width: 48px; height: 48px; border-radius: 12px; display:grid; place-items:center; background: var(--green-tint); color: var(--green); margin-bottom: 16px; }
.feature__ico svg { width: 24px; height: 24px; }
.feature h3 { font-size: 1.1rem; }
.feature p { color: var(--muted); font-size: .92rem; margin: 10px 0 0; }

/* =========================================================
   Tabs (products)
   ========================================================= */
.tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 36px; }
.tab {
  font-family: var(--font-jp); font-weight: 700; font-size: .9rem;
  padding: 10px 18px; border-radius: 999px; border: 1px solid var(--border);
  background: #fff; color: var(--navy); cursor: pointer; transition: all .2s;
}
.tab:hover { border-color: var(--green); color: var(--green-deep); }
.tab.is-active { background: var(--navy); color: #fff; border-color: var(--navy); }
.tab .num { font-size: .8em; opacity: .7; margin-left: 4px; }
.is-hidden { display: none !important; }

/* =========================================================
   Tables / data (about, clients, locations)
   ========================================================= */
.spec { width: 100%; border-collapse: collapse; }
.spec th, .spec td { text-align: left; padding: 14px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
.spec th { width: 160px; color: var(--navy); font-weight: 700; white-space: nowrap; }
.spec .num { color: var(--ink); }

.timeline { position: relative; padding-left: 28px; }
.timeline::before { content:""; position:absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: var(--border); }
.timeline li { position: relative; padding: 0 0 22px; }
.timeline li::before { content:""; position:absolute; left:-25px; top:7px; width:12px; height:12px; border-radius:50%; background:#fff; border:3px solid var(--green); }
.timeline .yr { font-family: var(--font-num); font-weight: 700; color: var(--navy); margin-right: 12px; }
.timeline .txt { color: var(--ink); }

/* accordion (clients) */
.acc { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background:#fff; margin-bottom: 14px; }
.acc__head { width: 100%; text-align: left; background: #fff; border: 0; cursor: pointer; padding: 18px 20px; font-family: var(--font-jp); font-weight: 700; color: var(--navy); font-size: 1.02rem; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.acc__head:hover { background: var(--green-tint); }
.acc__head .count { font-family: var(--font-num); font-size: .8rem; color: var(--muted); font-weight: 600; }
.acc__head .chev { transition: transform .25s; color: var(--green); }
.acc.is-open .acc__head .chev { transform: rotate(180deg); }
.acc__body { display: none; padding: 4px 20px 22px; }
.acc.is-open .acc__body { display: block; }
.acc__group { margin-top: 14px; }
.acc__group h4 { font-size: .9rem; color: var(--green-deep); margin-bottom: 8px; }
.company-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px 24px; }
.company-grid li { color: var(--ink); font-size: .9rem; padding: 4px 0; border-bottom: 1px dotted var(--border); }

/* locations */
.loc { display: grid; grid-template-columns: 180px 1fr; gap: 8px 24px; padding: 22px 0; border-bottom: 1px solid var(--border); }
.loc__name { font-weight: 700; color: var(--navy); }
.loc__name .badge { display:inline-block; margin-top:6px; font-family:var(--font-num); font-size:.7rem; font-weight:700; letter-spacing:.08em; padding:2px 8px; border-radius:999px; background:var(--green-tint); color:var(--green-deep); }
.loc__data { color: var(--ink); font-size: .94rem; }
.loc__data .num { letter-spacing: .02em; }
.loc-cat { font-size: 1.1rem; color: var(--green-deep); margin: 34px 0 4px; padding-bottom: 8px; border-bottom: 2px solid var(--green); }

/* =========================================================
   Contact form
   ========================================================= */
.form { display: grid; gap: 18px; }
.field { display: grid; gap: 6px; }
.field label { font-weight: 700; color: var(--navy); font-size: .9rem; }
.field .req { color: var(--green); font-family: var(--font-num); font-size: .75rem; margin-left: 6px; }
.field input, .field select, .field textarea {
  font-family: var(--font-jp); font-size: .98rem; color: var(--ink);
  padding: 12px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: #fff; transition: border-color .2s, box-shadow .2s; width: 100%;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--green); box-shadow: 0 0 0 3px var(--green-tint); }
.field textarea { min-height: 140px; resize: vertical; }
.demo-note { font-size: .82rem; color: var(--muted); background: var(--green-tint); border-left: 3px solid var(--green); padding: 10px 14px; border-radius: 6px; }

/* contact list */
.contact-list { display: grid; gap: 14px; }
.contact-item { padding: 16px 18px; border: 1px solid var(--border); border-radius: var(--radius-sm); }
.contact-item h4 { font-size: .98rem; }
.contact-item p { margin: 6px 0 0; font-size: .9rem; color: var(--ink); }
.contact-item .num { color: var(--navy); font-weight: 600; }

/* =========================================================
   Footer
   ========================================================= */
.site-footer { background: var(--navy-deep); color: rgba(255,255,255,.7); padding: 56px 0 28px; }
.site-footer .brand svg { height: 50px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; padding-bottom: 36px; border-bottom: 1px solid rgba(255,255,255,.12); }
.footer-cta { background: var(--green); color:#fff; border-radius: var(--radius); padding: 28px 32px; display:flex; align-items:center; justify-content:space-between; gap:20px; flex-wrap:wrap; margin-bottom: 48px; }
.footer-cta h3 { color:#fff; font-size: 1.3rem; }
.footer-cta p { color: rgba(255,255,255,.85); margin: 6px 0 0; }
.footer-nav h4 { color:#fff; font-size:.9rem; margin-bottom: 14px; letter-spacing:.05em; }
.footer-nav a { display:block; color: rgba(255,255,255,.7); padding: 5px 0; font-size:.9rem; }
.footer-nav a:hover { color:#6ee7a8; text-decoration:none; }
.footer-bottom { display:flex; justify-content:space-between; align-items:center; gap:16px; padding-top:22px; font-size:.82rem; color: rgba(255,255,255,.5); flex-wrap:wrap; }
.footer-bottom .num { font-family: var(--font-num); }

/* =========================================================
   Reveal animation
   ========================================================= */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity:1; transform:none; transition:none; }
  html { scroll-behavior: auto; }
}

/* =========================================================
   Proposal cover page
   ========================================================= */
.cover { min-height: 100vh; background: var(--navy); color:#fff; position:relative; overflow:hidden; }
.cover::before { content:""; position:absolute; inset:0; background-image: linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px), linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px); background-size:48px 48px; mask-image: radial-gradient(130% 100% at 70% 0%, #000 40%, transparent 80%); }
.cover__inner { position:relative; z-index:1; max-width: 980px; margin:0 auto; padding: clamp(48px,8vw,90px) var(--gutter); }
.cover .tag { font-family:var(--font-num); letter-spacing:.2em; text-transform:uppercase; color:#6ee7a8; font-weight:700; font-size:.8rem; }
.cover h1 { color:#fff; font-size: clamp(1.8rem,5vw,3rem); margin:16px 0 0; }
.cover .lead { color: rgba(255,255,255,.8); margin-top: 18px; max-width: 60ch; }
.issue { display:grid; grid-template-columns: repeat(3,1fr); gap:16px; margin: 40px 0; }
.issue__card { background: rgba(255,255,255,.06); border:1px solid rgba(255,255,255,.12); border-radius: var(--radius); padding: 22px; }
.issue__card .n { font-family:var(--font-num); font-weight:800; font-size:1.4rem; color:#ff8a8a; }
.issue__card h3 { color:#fff; font-size:1.05rem; margin:10px 0 8px; }
.issue__card p { color: rgba(255,255,255,.7); font-size:.88rem; margin:0; }
.ba { display:grid; grid-template-columns:1fr 1fr; gap:20px; margin-top: 18px; }
.ba__col { background:#fff; border-radius: var(--radius); overflow:hidden; }
.ba__label { padding:10px 16px; font-weight:700; font-size:.85rem; letter-spacing:.04em; }
.ba__before .ba__label { background:#f0d4d4; color:#8a3030; }
.ba__after .ba__label { background: var(--green); color:#fff; }
.ba__col .ph { border-radius:0; border:0; aspect-ratio: 4/3; }
.improve { background:#fff; color: var(--ink); border-radius: var(--radius); padding: clamp(24px,4vw,40px); margin-top: 40px; }
.improve h2 { margin-bottom: 18px; }
.improve ul { display:grid; grid-template-columns: repeat(2,1fr); gap: 12px 28px; }
.improve li { padding-left: 28px; position:relative; color: var(--ink); }
.improve li::before { content:""; position:absolute; left:0; top:9px; width:14px; height:14px; border-radius:4px; background: var(--green-tint); border:2px solid var(--green); }
.cover__actions { margin-top: 36px; display:flex; gap:14px; flex-wrap:wrap; }

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 1024px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hero__media { max-width: 520px; }
  .grid--3 { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .company-grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 760px) {
  :root { --header-h: 64px; }
  .nav {
    position: fixed; inset: var(--header-h) 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background:#fff; border-bottom:1px solid var(--border);
    padding: 8px var(--gutter) 20px; transform: translateY(-120%); transition: transform .3s;
    box-shadow: var(--shadow-md); max-height: calc(100vh - var(--header-h)); overflow:auto;
  }
  .nav.is-open { transform: translateY(0); }
  .nav a { padding: 14px 8px; border-bottom: 1px solid var(--border); border-radius:0; }
  .nav a[aria-current="page"]::after { display:none; }
  .hamburger { display: block; }
  .header-actions .btn--cta { display:none; }
  .nav-backdrop.is-open { display:block; position:fixed; inset:var(--header-h) 0 0 0; background:rgba(12,28,54,.4); z-index:40; }
  .grid--3, .grid--2 { grid-template-columns: 1fr; }
  .kpis { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .company-grid { grid-template-columns: 1fr; }
  .issue { grid-template-columns: 1fr; }
  .ba { grid-template-columns: 1fr; }
  .improve ul { grid-template-columns: 1fr; }
  .loc { grid-template-columns: 1fr; gap: 4px; }
  .spec th { width: 110px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}