/* DeHos — hos.deinv.in
   Design: clinical editorial. Warm paper ground, deep pine ink, mint signal. */

:root {
  --paper:      #f4f3ee;
  --paper-2:    #eceae2;
  --ink:        #0d1b16;
  --ink-soft:   #33443d;
  --muted:      #6b7a72;
  --line:       #d6d4c9;
  --mint:       #0f9d68;
  --mint-soft:  #d8f0e4;
  --amber:      #c07a1c;
  --dark:       #0d1b16;
  --dark-2:     #12241d;
  --dark-line:  #264036;
  --radius:     14px;
  --shadow:     0 1px 2px rgba(13,27,22,.05), 0 12px 32px -18px rgba(13,27,22,.35);
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, monospace;
  --sans: "Inter Tight", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: "Instrument Serif", Georgia, "Times New Roman", serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -.02em; line-height: 1.08; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: inherit; }

.wrap { width: min(1180px, 100% - 2.5rem); margin-inline: auto; }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--ink); color: var(--paper); padding: .7rem 1rem; border-radius: 0 0 8px 0;
}
.skip:focus { left: 0; }

/* ── header ───────────────────────────────────────────── */
.site-head {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(14px) saturate(1.2);
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease, background .3s ease;
}
.site-head.scrolled { border-bottom-color: var(--line); }
.head-inner { display: flex; align-items: center; gap: 1.25rem; height: 68px; }

.brand { display: flex; align-items: center; gap: .6rem; text-decoration: none; font-weight: 700; letter-spacing: -.01em; }
.brand-mark {
  display: grid; place-items: center; width: 30px; height: 30px; border-radius: 9px;
  background: var(--ink); color: #37e0a0;
}

/* Premium Education logo lockup */
.brand-badge {
  display: grid; place-items: center; padding: .22rem .45rem;
  background: var(--ink); border-radius: 8px; line-height: 0;
}
.brand-badge img { display: block; height: 22px; width: auto; }
.brand-mark.small { width: 22px; height: 22px; border-radius: 7px; display: inline-grid; vertical-align: -4px; margin-right: .35rem; }
.brand-sub { font-size: .74rem; font-weight: 500; color: var(--muted); letter-spacing: .04em; text-transform: uppercase; }

.nav { margin-left: auto; display: flex; gap: 1.4rem; }
.nav a {
  text-decoration: none; font-size: .92rem; font-weight: 500; color: var(--ink-soft);
  padding: .3rem 0; border-bottom: 2px solid transparent; transition: color .2s, border-color .2s;
}
.nav a:hover { color: var(--ink); }
.nav a.active { color: var(--ink); border-bottom-color: var(--mint); }

.nav-toggle { display: none; background: none; border: 0; padding: .5rem; cursor: pointer; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 5px 0; transition: transform .25s ease, opacity .2s ease; }
.nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }

/* ── buttons ──────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--ink); color: var(--paper);
  padding: .78rem 1.3rem; border-radius: 999px;
  font-size: .95rem; font-weight: 600; text-decoration: none; white-space: nowrap;
  border: 1px solid var(--ink);
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 10px 22px -14px rgba(13,27,22,.7); }
.btn-sm { padding: .55rem 1rem; font-size: .88rem; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink); }

/* ── hero ─────────────────────────────────────────────── */
.hero { position: relative; padding: 5.5rem 0 3rem; overflow: hidden; }
.hero-grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 68px 68px;
  mask-image: radial-gradient(120% 70% at 78% 8%, #000 0%, transparent 62%);
  opacity: .55;
}
.hero-inner { position: relative; max-width: 900px; }

.eyebrow {
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: var(--mono); font-size: .74rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 1.4rem;
}
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 0 4px var(--mint-soft); }

.hero h1 { font-size: clamp(2.6rem, 6.4vw, 4.9rem); letter-spacing: -.035em; }
.hero h1 em { font-family: var(--serif); font-style: italic; font-weight: 400; letter-spacing: -.01em; color: var(--mint); }

.lede { margin-top: 1.6rem; font-size: clamp(1.03rem, 1.6vw, 1.2rem); color: var(--ink-soft); max-width: 62ch; }
.hero-cta { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 2rem; }

.hero-stats {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.5rem;
  margin: 3.4rem 0 0; padding-top: 1.8rem; border-top: 1px solid var(--line);
}
.hero-stats dt { font-family: var(--serif); font-size: 1.9rem; letter-spacing: -.02em; }
.hero-stats dd { margin: .25rem 0 0; font-size: .88rem; color: var(--muted); line-height: 1.45; }

/* ── hero mock ────────────────────────────────────────── */
.hero-mock {
  position: relative; margin-top: 4rem;
  background: var(--dark); border-radius: 18px; padding: 0;
  box-shadow: 0 40px 80px -50px rgba(13,27,22,.9);
  border: 1px solid var(--dark-line);
  overflow: hidden;
}
.mock-bar { display: flex; align-items: center; gap: 1rem; padding: .7rem 1rem; border-bottom: 1px solid var(--dark-line); }
.mock-dots { display: flex; gap: .35rem; }
.mock-dots i { width: 9px; height: 9px; border-radius: 50%; background: #33544a; }
.mock-url { font-family: var(--mono); font-size: .74rem; color: #7fa294; }
.mock-pill { margin-left: auto; font-family: var(--mono); font-size: .68rem; color: #37e0a0; border: 1px solid #2c5c48; background: #123125; padding: .1rem .5rem; border-radius: 999px; }
.mock-body { display: grid; grid-template-columns: 58px 1fr; min-height: 260px; }
.mock-rail { display: flex; flex-direction: column; align-items: center; gap: 1rem; padding: 1rem 0; border-right: 1px solid var(--dark-line); }
.mock-logo { width: 26px; height: 26px; border-radius: 8px; background: #37e0a0; color: var(--dark); display: grid; place-items: center; font-weight: 700; font-size: .8rem; }
.mock-rail i { width: 18px; height: 4px; border-radius: 2px; background: #2c4a3f; }
.mock-rail i.on { background: #37e0a0; }
.mock-main { padding: 1.1rem; }
.mock-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: .75rem; }
.mock-card { background: #14291f; border: 1px solid var(--dark-line); border-radius: 10px; padding: .7rem .8rem; display: flex; flex-direction: column; gap: .15rem; }
.mock-card b { font-size: .8rem; color: #cfe6db; font-weight: 600; }
.mock-card span { font-family: var(--mono); font-size: .95rem; color: #37e0a0; }
.mock-table { width: 100%; border-collapse: collapse; margin-top: 1rem; font-size: .84rem; }
.mock-table th { text-align: left; font-family: var(--mono); font-size: .66rem; letter-spacing: .1em; text-transform: uppercase; color: #6f8d80; font-weight: 500; padding: .35rem .5rem; }
.mock-table td { padding: .5rem .5rem; border-top: 1px solid var(--dark-line); color: #bcd3c8; }
.tag { font-size: .7rem; padding: .12rem .5rem; border-radius: 999px; background: #1d3a2e; color: #9dc4b1; border: 1px solid #2c4a3f; }
.tag.green { background: #12382a; color: #57e2a6; border-color: #276b4d; }
.tag.amber { background: #3a2c12; color: #e5b567; border-color: #6b5027; }

/* ── sections ─────────────────────────────────────────── */
.section { padding: 6rem 0; border-top: 1px solid var(--line); }
.section-tint { background: var(--paper-2); }
.section-dark { background: var(--dark); color: #dfece6; border-top-color: var(--dark-line); }

.section-head { max-width: 760px; margin-bottom: 3.2rem; }
.section-head .num {
  font-family: var(--mono); font-size: .72rem; letter-spacing: .16em; color: var(--muted);
  display: block; margin-bottom: .9rem;
}
.section-dark .section-head .num { color: #6f8d80; }
.section-head h2 { font-size: clamp(1.85rem, 3.6vw, 2.7rem); }
.section-head .sub { margin-top: .9rem; color: var(--ink-soft); font-size: 1.05rem; max-width: 60ch; }
.section-dark .section-head .sub { color: #a9c2b7; }

/* ── problem ──────────────────────────────────────────── */
.problem-list { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.problem { background: var(--paper); padding: 1.8rem 1.9rem; display: grid; grid-template-columns: 56px 1fr; gap: 0 1rem; }
.problem .p-idx { font-family: var(--mono); font-size: .74rem; color: var(--mint); padding-top: .35rem; }
.problem h3 { font-size: 1.22rem; grid-column: 2; }
.problem p { grid-column: 2; margin-top: .55rem; color: var(--ink-soft); font-size: .98rem; max-width: 78ch; }
.mini-flow { grid-column: 2; display: flex; flex-wrap: wrap; align-items: center; gap: .4rem; margin-top: 1rem; }
.mini-flow li {
  font-family: var(--mono); font-size: .7rem; letter-spacing: .04em;
  background: var(--paper-2); border: 1px solid var(--line); border-radius: 6px; padding: .25rem .55rem; color: var(--ink-soft);
}
.mini-flow li + li::before { content: "→ "; color: var(--muted); }

/* ── ecosystem ────────────────────────────────────────── */
.eco {
  border: 1px solid var(--dark-line); border-radius: 18px; padding: 2.2rem 1.6rem;
  background: linear-gradient(180deg, #12241d, #0f1f19);
}
.eco-row { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: .6rem; }
.eco-row-2 { margin-top: 1rem; }
.node {
  border: 1px solid var(--dark-line); background: #16291f; color: #d8ece2;
  padding: .55rem 1rem; border-radius: 999px; font-size: .9rem; font-weight: 500;
}
.node-patient, .node-app, .node-doctor, .node-lab, .node-pharmacy, .node-billing, .node-insurance, .node-ambulance, .node-gov { border-color: #2f5c48; }
.node-app { background: #14382a; color: #7ff0bd; border-color: #2f7a58; }
.node-server { background: #1c3328; }
.arrow { font-family: var(--mono); color: #5f8273; }
.eco-tail { display: flex; flex-direction: column; align-items: center; gap: .3rem; margin-top: 1.2rem; }
.eco-note { font-size: .82rem; color: #7fa294; font-style: italic; font-family: var(--serif); font-size: 1rem; }

.promise-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; margin-top: 2.4rem; }
.promise { border-top: 1px solid var(--dark-line); padding-top: 1.1rem; }
.promise b { display: block; font-size: 1.02rem; color: #eaf6f0; }
.promise span { display: block; margin-top: .45rem; font-size: .93rem; color: #a9c2b7; line-height: 1.55; }

/* ── modules ──────────────────────────────────────────── */
.modules { display: grid; grid-template-columns: repeat(auto-fit, minmax(258px, 1fr)); gap: 1rem; }
.module {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.5rem 1.5rem 1.3rem; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.module:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: #bfc4b8; }
.module header { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; margin-bottom: 1rem; }
.module h3 { font-size: 1.14rem; }
.module-tag { font-family: var(--mono); font-size: .64rem; letter-spacing: .1em; text-transform: uppercase; color: var(--mint); background: var(--mint-soft); border-radius: 999px; padding: .18rem .5rem; white-space: nowrap; }
.module ul { display: grid; gap: .42rem; }
.module li { font-size: .94rem; color: var(--ink-soft); padding-left: 1.05rem; position: relative; }
.module li::before { content: ""; position: absolute; left: 0; top: .62em; width: 5px; height: 5px; border-radius: 50%; background: var(--mint); opacity: .7; }
.module-wide { grid-column: 1 / -1; }
.inline-list { display: flex !important; flex-wrap: wrap; gap: .5rem !important; }
.inline-list li { background: var(--paper-2); border: 1px solid var(--line); border-radius: 999px; padding: .3rem .8rem .3rem 1.1rem; font-size: .88rem; }
.inline-list li::before { top: .85em; left: .55rem; }

/* ── workflow steps ───────────────────────────────────── */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(215px, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.steps li { background: var(--paper-2); padding: 1.15rem 1.2rem; position: relative; }
.step-n { font-family: var(--mono); font-size: .68rem; color: var(--muted); letter-spacing: .1em; }
.steps b { display: block; margin-top: .35rem; font-size: 1rem; }
.steps p { margin-top: .3rem; font-size: .88rem; color: var(--muted); line-height: 1.5; }
.steps li::after { content: ""; position: absolute; right: -1px; top: 0; bottom: 0; width: 1px; background: var(--line); }

/* ── architecture ─────────────────────────────────────── */
.arch { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.arch-col { border: 1px solid var(--line); border-radius: var(--radius); padding: 1.4rem; background: #fff; }
.arch-col h3 { font-size: .78rem; font-family: var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); font-weight: 500; margin-bottom: 1rem; }
.chips { display: flex; flex-wrap: wrap; gap: .45rem; }
.chips li { font-size: .88rem; border: 1px solid var(--line); background: var(--paper); border-radius: 8px; padding: .3rem .65rem; }
.chips-dark li { background: #16291f; border-color: var(--dark-line); color: #cfe6db; }

.arch-flow { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; margin-top: 1.6rem; font-family: var(--mono); font-size: .78rem; color: var(--ink-soft); }
.arch-flow span { background: var(--paper-2); border: 1px solid var(--line); border-radius: 6px; padding: .28rem .6rem; }
.arch-flow i { color: var(--muted); font-style: normal; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; margin-top: 3rem; }
.h3-sm { font-size: 1.05rem; margin-bottom: 1rem; }
.check-list { display: grid; gap: .6rem; }
.check-list li { position: relative; padding-left: 1.6rem; font-size: .96rem; color: var(--ink-soft); }
.check-list li::before {
  content: "✓"; position: absolute; left: 0; top: 0; color: var(--mint); font-size: .82rem; font-weight: 700;
}

/* ── roadmap ──────────────────────────────────────────── */
.roadmap { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 1.2rem; }
.roadmap li { border-top: 1px solid var(--dark-line); padding-top: 1rem; }
.r-year { font-family: var(--mono); font-size: .7rem; letter-spacing: .12em; color: #37e0a0; text-transform: uppercase; }
.roadmap b { display: block; margin-top: .4rem; font-size: 1.05rem; color: #eaf6f0; }
.roadmap p { margin-top: .35rem; font-size: .9rem; color: #a9c2b7; line-height: 1.5; }
.future { margin-top: 3rem; }
.future h3 { font-size: .78rem; font-family: var(--mono); letter-spacing: .14em; text-transform: uppercase; color: #6f8d80; font-weight: 500; margin-bottom: 1rem; }

/* ── contact ──────────────────────────────────────────── */
.contact-wrap { display: grid; grid-template-columns: 1.35fr .85fr; gap: 3rem; align-items: start; }
.section-head.left { margin-bottom: 2rem; }
.contact-actions { display: flex; flex-wrap: wrap; gap: .7rem; }
.team { margin-top: 2rem; font-family: var(--mono); font-size: .74rem; color: var(--muted); letter-spacing: .03em; line-height: 1.8; }
.contact-card { background: var(--dark); color: #dfece6; border-radius: 18px; padding: 1.8rem; }
.cc-label { font-family: var(--mono); font-size: .7rem; letter-spacing: .14em; text-transform: uppercase; color: #6f8d80; margin-bottom: 1rem; }
.contact-card ul { display: grid; gap: .6rem; }
.contact-card li { font-size: .95rem; padding-left: 1.4rem; position: relative; }
.contact-card li::before { content: "→"; position: absolute; left: 0; color: #37e0a0; }
.cc-foot { margin-top: 1.4rem; padding-top: 1.2rem; border-top: 1px solid var(--dark-line); font-size: .88rem; color: #a9c2b7; }

/* ── footer ───────────────────────────────────────────── */
.site-foot { border-top: 1px solid var(--line); padding: 2rem 0; }
.foot-inner { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; align-items: center; font-size: .86rem; color: var(--muted); }
.foot-brand { font-weight: 600; color: var(--ink); display: flex; align-items: center; gap: .6rem; }
.foot-logo { height: 22px; width: auto; display: block; background: var(--ink); border-radius: 6px; padding: .18rem .4rem; }

/* ── reveal ───────────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ── responsive ───────────────────────────────────────── */
@media (max-width: 980px) {
  .promise-grid, .arch, .two-col, .contact-wrap { grid-template-columns: 1fr; }
  .promise-grid { gap: 1.6rem; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  body { font-size: 16px; }
  .nav {
    position: fixed; inset: 68px 0 auto; flex-direction: column; gap: 0;
    background: var(--paper); border-bottom: 1px solid var(--line);
    padding: .5rem 1.25rem 1.25rem; margin: 0;
    transform: translateY(-8px); opacity: 0; pointer-events: none; transition: opacity .2s ease, transform .2s ease;
  }
  .nav.open { opacity: 1; transform: none; pointer-events: auto; }
  .nav a { padding: .8rem 0; border-bottom: 1px solid var(--line); font-size: 1rem; }
  .nav-toggle { display: block; margin-left: auto; }
  .head-inner .btn-sm { display: none; }
  .section { padding: 4rem 0; }
  .hero { padding: 3.4rem 0 2rem; }
  .problem { grid-template-columns: 1fr; padding: 1.5rem; }
  .problem h3, .problem p, .mini-flow { grid-column: 1; }
  .problem .p-idx { padding-top: 0; margin-bottom: .3rem; }
  .mock-body { grid-template-columns: 44px 1fr; }
  .mock-cards { grid-template-columns: 1fr; }
  .mock-table th:nth-child(3), .mock-table td:nth-child(3) { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { transition-duration: .01ms !important; }
}