/* ── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --accent:       #6ee87a;
  --accent-hover: #4cd964;
  --bg:           #0a0a0a;
  --surface:      #111111;
  --surface-2:    #181818;
  --border:       #242424;
  --text:         #d8d8d8;
  --text-muted:   #888888;
  --heading:      #f5f5f5;
  --white:        #ffffff;
  --radius:       2px;
}

html { scroll-behavior: smooth; }

body {
  font-family: "Inter", system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
}

img { display: block; max-width: 100%; height: auto; }

/* ── Layout ───────────────────────────────────────────────── */
.container { max-width: 1140px; margin: 0 auto; padding: 0 32px; }
.narrow    { max-width: 720px; }
.center    { text-align: center; }

.section { padding: 100px 0; }
.section-gray { background: var(--surface); }
.section-dark { background: var(--surface-2); }

/* ── Typography ───────────────────────────────────────────── */
h1 {
  font-size: clamp(32px, 5vw, 60px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--white);
}
h2 {
  font-size: clamp(22px, 3vw, 36px);
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--heading);
  line-height: 1.2;
}
h3 {
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: .12em;
}
p { margin-bottom: 1em; }
p:last-child { margin-bottom: 0; }

.section-title { margin-bottom: 10px; }
.section-sub   { color: var(--text-muted); margin-bottom: 48px; }

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 10px 24px;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background .15s, border-color .15s, color .15s;
}
.btn-green {
  background: var(--accent);
  color: var(--white);
  border-color: var(--accent);
}
.btn-green:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}
.btn-white-outline {
  background: transparent;
  color: var(--text-muted);
  border-color: rgba(255,255,255,0.45);
}
.btn-white-outline:hover {
  border-color: var(--white);
  color: var(--white);
}
.btn-full { width: 100%; text-align: center; }

/* ── Nav ──────────────────────────────────────────────────── */
.nav {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
}
.nav-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 80px;
}
.logo-img { height: 52px; width: auto; filter: brightness(0) invert(1); }

.nav-left {
  display: flex;
  align-items: center;
  gap: 20px;
}
.nav-right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 20px;
}
.nav-left a,
.nav-right a:not(.btn) {
  font-size: 12px;
  font-weight: 500;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  letter-spacing: .07em;
  text-transform: uppercase;
  transition: color .15s;
}
.nav-left a:hover,
.nav-right a:not(.btn):hover { color: var(--white); }
.nav-right .btn { color: #0a0a0a; }

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  position: relative;
  background: url('https://images.unsplash.com/photo-1500382017468-9049fed747ef?w=1800&auto=format&fit=crop') center center / cover no-repeat;
  padding: 200px 0 100px;
  overflow: hidden;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(5,60,15,0.65) 0%, rgba(5,50,12,0.38) 50%, rgba(5,60,15,0.55) 100%);
}
.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 760px;
}
.hero h1 { margin-bottom: 24px; }
.hero-sub {
  font-size: clamp(15px, 1.8vw, 17px);
  color: rgba(255,255,255,0.75);
  margin-bottom: 40px;
  max-width: 540px;
  line-height: 1.65;
}
.hero-btns { display: flex; gap: 12px; flex-wrap: wrap; }

/* ── About / Split layout ─────────────────────────────────── */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.split-text h2 { margin-bottom: 20px; }
.split-img img {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  width: 100%;
  object-fit: cover;
}

.callout-stat {
  display: flex;
  align-items: baseline;
  gap: 14px;
  border-left: 2px solid var(--accent);
  padding: 16px 20px;
  margin-top: 32px;
}
.callout-num   { font-size: 28px; font-weight: 700; color: var(--accent); white-space: nowrap; letter-spacing: -0.02em; }
.callout-label { font-size: 13px; color: var(--text-muted); line-height: 1.5; }

/* ── Strip ────────────────────────────────────────────────── */
.strip {
  background: var(--surface);
  padding: 22px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.strip-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.strip span {
  color: var(--text-muted);
  font-size: 13px;
  letter-spacing: .02em;
}
.strip .btn-green { white-space: nowrap; }

/* ── Application cards ────────────────────────────────────── */
.app-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.app-card {
  background: var(--bg);
  display: flex;
  flex-direction: column;
}
.app-img-wrap { height: 200px; overflow: hidden; }
.app-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
  filter: grayscale(25%) brightness(.85);
}
.app-card:hover .app-img-wrap img { transform: scale(1.04); filter: grayscale(0%) brightness(1); }
.app-body { padding: 28px; flex: 1; }
.app-body ul { padding-left: 0; margin-top: 0; list-style: none; }
.app-body li {
  margin-bottom: 8px;
  font-size: 14px;
  color: var(--text-muted);
  padding-left: 16px;
  position: relative;
}
.app-body li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--border);
}

/* ── Testimonial ──────────────────────────────────────────── */
.testimonial-section {
  background: var(--bg);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.testimonial-inner {
  display: flex;
  align-items: center;
  gap: 40px;
  max-width: 720px;
  margin: 0 auto;
}
.testimonial-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  filter: grayscale(30%);
  border: 1px solid var(--border);
}
.testimonial-quote p {
  font-size: 17px;
  font-style: italic;
  color: var(--heading);
  margin-bottom: 12px;
  line-height: 1.6;
}
.testimonial-quote cite {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: .1em;
  text-transform: uppercase;
  font-style: normal;
}

/* ── Contact form ─────────────────────────────────────────── */
.contact-form {
  margin-top: 40px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 48px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}
.form-group:last-of-type { margin-bottom: 28px; }
label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: .1em;
  text-transform: uppercase;
}
.req { color: var(--accent); }
input, select, textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid #333;
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  color: var(--heading);
  background: #222;
  transition: border-color .15s;
}
input::placeholder, textarea::placeholder { color: #555; }
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
}
select option { background: var(--surface); }
textarea { resize: vertical; }

/* ── Footer ───────────────────────────────────────────────── */
.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  padding: 40px 0;
  font-size: 13px;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-logo { height: 30px; width: auto; filter: brightness(0) invert(1); opacity: .5; }
.footer-info { display: flex; flex-direction: column; gap: 2px; }
.footer a { color: var(--text-muted); text-decoration: none; transition: color .15s; }
.footer a:hover { color: var(--white); }

/* ── Contact form: honeypot + status ─────────────────────── */
.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.form-status { margin-top: 0.75rem; font-size: 14px; }
.form-status.success { color: var(--accent); }
.form-status.error   { color: #ff6b6b; }

/* ── Nav: solid variant for inner pages ───────────────────── */
.nav-solid {
  position: sticky;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

/* ── Eyebrow label ────────────────────────────────────────── */
.eyebrow {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

/* ── Page hero (inner pages) ──────────────────────────────── */
.page-hero {
  background: var(--surface);
  padding: 80px 0 64px;
  border-bottom: 1px solid var(--border);
}
.page-hero h1 {
  font-size: clamp(28px, 4vw, 48px);
  color: var(--heading);
  margin-bottom: 16px;
}
.page-hero p {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 600px;
}
.page-hero .tags { margin-top: 28px; }

/* ── Stats strip ──────────────────────────────────────────── */
.stats-strip {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

/* ── Stats row ────────────────────────────────────────────── */
.stats-row {
  display: flex;
}
.stat-item {
  flex: 1;
  padding: 28px 24px;
  text-align: center;
}
.stat-num {
  display: block;
  font-size: 40px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 8px;
}
.stat-label {
  font-size: 12px;
  color: rgba(255,255,255,0.35);
  text-transform: uppercase;
  letter-spacing: .08em;
}

/* ── Market grid (4-up homepage) ──────────────────────────── */
.market-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.market-card {
  background: var(--bg);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
}
.market-desc {
  font-size: 14px;
  color: var(--text-muted);
  flex: 1;
  margin-bottom: 24px;
  margin-top: 10px;
}
.market-link {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent);
  text-decoration: none;
}
.market-link:hover { color: var(--accent-hover); }

/* ── Steps (01 02 03 04) ──────────────────────────────────── */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 48px;
}
.step { background: var(--bg); padding: 36px 28px; }
.step-num {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.step h3 { font-size: 15px; color: var(--heading); text-transform: none; letter-spacing: 0; margin-bottom: 10px; }
.step p { font-size: 14px; color: var(--text-muted); margin-bottom: 0; }

/* ── Pillars (McLaughlin Method) ──────────────────────────── */
.pillars {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 48px;
}
.pillar { background: var(--bg); padding: 32px 28px; }
.pillar-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.pillar h3 {
  font-size: 18px;
  color: var(--heading);
  text-transform: none;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}
.pillar p { font-size: 13px; color: var(--text-muted); margin-bottom: 0; }

/* ── Certification tags ───────────────────────────────────── */
.tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 24px; }
.tag {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
}
.tag-accent { border-color: var(--accent); color: var(--accent); }

/* ── Feature grid (3-col: asset-light, quality, revenue) ──── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 48px;
}
.feature-card { background: var(--surface-2); padding: 36px 28px; }
.feature-card h3 { margin-bottom: 12px; }
.feature-card p { font-size: 14px; color: var(--text-muted); margin-bottom: 0; }

/* ── Revenue grid (triple stack) ──────────────────────────── */
.revenue-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 48px;
}
.revenue-card { background: var(--bg); padding: 36px 28px; }
.revenue-stream {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.revenue-card h3 {
  font-size: 16px;
  color: var(--heading);
  text-transform: none;
  letter-spacing: 0;
  margin-bottom: 12px;
}
.revenue-card p { font-size: 14px; color: var(--text-muted); margin-bottom: 0; }

/* ── Sub-application grid (4-col, market detail pages) ────── */
.sub-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 48px;
}
.sub-grid-3 { grid-template-columns: repeat(3, 1fr); }
.sub-grid-5 { grid-template-columns: repeat(5, 1fr); }
.sub-card { background: var(--bg); padding: 32px 28px; }
.sub-grid-5 .sub-card { padding: 28px 20px; }
.sub-card h3 { margin-bottom: 12px; }
.sub-card ul { padding-left: 0; list-style: none; margin-top: 0; }
.sub-card li {
  font-size: 13px;
  color: var(--text-muted);
  padding-left: 14px;
  position: relative;
  margin-bottom: 6px;
}
.sub-card li::before { content: '●'; position: absolute; left: 0; color: var(--accent); font-size: 7px; top: 6px; }

/* ── Research papers grid ─────────────────────────────────── */
.papers-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.papers-grid-2 { grid-template-columns: repeat(2, 1fr); }
.papers-grid-1 { grid-template-columns: 1fr; max-width: 440px; }
.paper-card { background: var(--bg); padding: 32px 28px; }
.paper-cat {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.paper-card h3 {
  font-size: 15px;
  color: var(--heading);
  text-transform: none;
  letter-spacing: 0;
  margin-bottom: 4px;
}
.paper-journal {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 12px;
  font-style: italic;
}
.paper-card p { font-size: 13px; color: var(--text-muted); margin-bottom: 0; }
.paper-doi { margin-top: 14px; }
.paper-doi a { font-size: 11px; color: var(--accent); opacity: .7; text-decoration: none; }
.paper-doi a:hover { opacity: 1; text-decoration: underline; }
.paper-oa {
  display: inline-block;
  font-size: 9px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 2px;
  padding: 1px 4px;
  margin-left: 6px;
  opacity: .65;
  vertical-align: middle;
}

/* ── Team grid ────────────────────────────────────────────── */
.team-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.team-card { background: var(--bg); padding: 32px 24px; }
.team-card h3 {
  font-size: 15px;
  color: var(--heading);
  text-transform: none;
  letter-spacing: 0;
  margin-bottom: 4px;
}
.team-role {
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 12px;
  display: block;
}
.team-card p { font-size: 13px; color: var(--text-muted); margin-bottom: 0; }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 1100px) {
  .market-grid  { grid-template-columns: repeat(2, 1fr); }
  .steps        { grid-template-columns: repeat(2, 1fr); }
  .pillars      { grid-template-columns: repeat(2, 1fr); }
  .sub-grid     { grid-template-columns: repeat(2, 1fr); }
  .team-grid    { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 900px) {
  .app-grid       { grid-template-columns: 1fr; }
  .papers-grid    { grid-template-columns: repeat(2, 1fr); }
  .papers-grid-2  { grid-template-columns: 1fr; }
  .revenue-grid   { grid-template-columns: 1fr; }
  .feature-grid   { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .section        { padding: 72px 0; }
  .split          { grid-template-columns: 1fr; gap: 40px; }
  .form-row       { grid-template-columns: 1fr; }
  .contact-form   { padding: 28px 24px; }
  .strip-inner    { flex-direction: column; align-items: flex-start; }
  .footer-inner   { flex-direction: column; align-items: flex-start; }
  .market-grid    { grid-template-columns: 1fr; }
  .steps          { grid-template-columns: 1fr; }
  .pillars        { grid-template-columns: repeat(2, 1fr); }
  .sub-grid       { grid-template-columns: 1fr; }
  .papers-grid, .papers-grid-2 { grid-template-columns: 1fr; }
  .team-grid      { grid-template-columns: repeat(2, 1fr); }
  .stats-row      { flex-direction: column; }
  .nav-left, .nav-right { display: none; }
}