*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --navy:        #050d1a;
  --navy-2:      #0a1628;
  --navy-3:      #0f1f38;
  --accent:      #00d4ff;
  --accent-dim:  rgba(0, 212, 255, 0.12);
  --accent-bdr:  rgba(0, 212, 255, 0.28);
  --green:       #3dd68c;
  --green-dim:   rgba(61, 214, 140, 0.12);
  --green-bdr:   rgba(61, 214, 140, 0.28);
  --text:        #e8edf5;
  --text-mid:    #97aac8;
  --text-dim:    #627088;
  --border:      rgba(255, 255, 255, 0.07);
  --display:     'Barlow Condensed', sans-serif;
  --mono:        'IBM Plex Mono', monospace;
}

html { scroll-behavior: smooth; }

body {
  background: var(--navy);
  color: var(--text);
  font-family: var(--mono);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}


/* ── NAV ─────────────────────────────────────────── */

nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 3rem;
  background: linear-gradient(to bottom, rgba(5,13,26,0.96), transparent);
}

.nav-logo {
  font-family: var(--display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--accent);
  text-decoration: none;
  text-transform: uppercase;
}

.nav-links { display: flex; gap: 2rem; list-style: none; }

.nav-links a {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--text-mid);
  text-decoration: none;
  text-transform: uppercase;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--accent); }

.nav-cta {
  color: var(--accent) !important;
  border: 1px solid var(--accent-bdr);
  padding: 0.4rem 1rem;
  border-radius: 2px;
  transition: background 0.2s !important;
}

.nav-cta:hover { background: var(--accent-dim) !important; }


/* ── HERO ────────────────────────────────────────── */

#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 7rem 3rem 4rem;
  overflow: hidden;
  text-align: center;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 65% 35%, rgba(0,80,140,0.55) 0%, transparent 60%),
    radial-gradient(ellipse 45% 35% at 25% 75%, rgba(0,180,100,0.12) 0%, transparent 55%),
    linear-gradient(160deg, #050d1a 0%, #0a1e3a 50%, #071525 100%);
  animation: heroShift 14s ease-in-out infinite alternate;
}

/* To use a real simulation video, replace .hero-bg with:
   <video autoplay muted loop playsinline>
     <source src="simulation.mp4" type="video/mp4">
   </video>
   and add this CSS:
   #hero video { position:absolute; inset:0; width:100%; height:100%; object-fit:cover; z-index:0; }
*/

@keyframes heroShift {
  0%   { filter: hue-rotate(0deg)  brightness(1); }
  100% { filter: hue-rotate(12deg) brightness(1.08); }
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top,
    rgba(5,13,26,0.97) 0%,
    rgba(5,13,26,0.45) 45%,
    rgba(5,13,26,0.15) 100%);
  z-index: 1;
}

.hero-grid {
  position: absolute;
  inset: 0;
  z-index: 2;
  background-image:
    linear-gradient(rgba(0,212,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: linear-gradient(to top, rgba(0,0,0,0.5) 0%, transparent 55%);
}

.hero-content { position: relative; z-index: 3; max-width: 820px; width: 100%; }

.hero-tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.25em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeUp 0.8s 0.2s forwards;
}

.hero-h1 {
  font-family: var(--display);
  font-size: clamp(3rem, 6.5vw, 6rem);
  font-weight: 800;
  line-height: 0.95;
  color: var(--text);
  margin-bottom: 1.75rem;
  opacity: 0;
  animation: fadeUp 0.8s 0.4s forwards;
  text-transform: uppercase;
}

.hero-h1 em { font-style: normal; color: var(--accent); }

.hero-sub {
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-mid);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  opacity: 0;
  animation: fadeUp 0.8s 0.6s forwards;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  opacity: 0;
  animation: fadeUp 0.8s 0.8s forwards;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: none; }
}


/* ── BUTTONS ─────────────────────────────────────── */

.btn-primary {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--navy);
  background: var(--accent);
  border: none;
  padding: 0.85rem 2rem;
  border-radius: 2px;
  cursor: pointer;
  text-decoration: none;
  font-weight: 500;
  text-transform: uppercase;
  transition: opacity 0.2s, transform 0.2s;
  display: inline-block;
}

.btn-primary:hover { opacity: 0.85; transform: translateY(-1px); }

.btn-ghost {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--text-mid);
  background: transparent;
  border: 1px solid var(--border);
  padding: 0.85rem 2rem;
  border-radius: 2px;
  cursor: pointer;
  text-decoration: none;
  text-transform: uppercase;
  transition: border-color 0.2s, color 0.2s;
  display: inline-block;
}

.btn-ghost:hover { border-color: var(--accent-bdr); color: var(--text); }


/* ── CREDIBILITY STRIP ───────────────────────────── */

#credibility {
  background: var(--navy-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 3rem;
}

.cred-inner {
  display: flex;
  gap: 2.5rem;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}

.cred-item { display: flex; align-items: baseline; gap: 0.6rem; white-space: nowrap; }

.cred-num {
  font-family: var(--display);
  font-size: 22px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.cred-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--text-mid);
  text-transform: uppercase;
}

.cred-div { width: 1px; height: 26px; background: var(--border); }


/* ── TESTIMONIAL ─────────────────────────────────── */

#testimonial {
  background: var(--navy);
  padding: 5rem 3rem;
  border-bottom: 1px solid var(--border);
}

.testimonial-layout {
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  gap: 4rem;
  align-items: center;
}

.testimonial-video {
  border: 1px solid var(--accent-bdr);
  border-radius: 4px;
  overflow: hidden;
  background: var(--navy-3);
  position: relative;
  min-width: 0;
}

.testimonial-video::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(to right, var(--accent), transparent);
  z-index: 1;
}

.testimonial-video video {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
}

.testimonial-inner {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.testimonial-quote {
  font-family: var(--display);
  font-size: clamp(1.3rem, 2.4vw, 1.8rem);
  font-weight: 600;
  line-height: 1.3;
  color: var(--text);
  text-transform: uppercase;
  margin-bottom: 1.75rem;
}

.testimonial-source { display: flex; align-items: center; gap: 1rem; }

.testimonial-divider { width: 24px; height: 1px; background: var(--accent); opacity: 0.6; }

.testimonial-name {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--text);
  letter-spacing: 0.08em;
}

.testimonial-org {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 0.08em;
  margin-top: 2px;
}


/* ── SECTION COMMON ──────────────────────────────── */

section { padding: 6rem 3rem; }

.s-tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.25em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.s-h2 {
  font-family: var(--display);
  font-size: clamp(2rem, 3.8vw, 3.2rem);
  font-weight: 700;
  line-height: 1.0;
  text-transform: uppercase;
  max-width: 640px;
  margin-bottom: 1rem;
}

.s-lead {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--text-mid);
  max-width: 560px;
  line-height: 1.85;
  margin-bottom: 3.5rem;
}


/* ── SERVICES ────────────────────────────────────── */

#services { background: var(--navy-2); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.svc-card {
  background: var(--navy);
  padding: 2.5rem;
  position: relative;
  transition: background 0.25s;
}

.svc-card:hover { background: var(--navy-3); }

.svc-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(to right, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.25s;
}

.svc-card:hover::before { opacity: 1; }

.svc-num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 0.15em;
  margin-bottom: 1.5rem;
}

.svc-title {
  font-family: var(--display);
  font-size: 22px;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 1rem;
  line-height: 1.1;
}

.svc-body {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--text-mid);
  line-height: 1.85;
  margin-bottom: 1.75rem;
}

.svc-tags { display: flex; flex-wrap: wrap; gap: 6px; }

.stag {
  font-family: var(--mono);
  font-size: 10px;
  padding: 3px 9px;
  border: 1px solid var(--accent-bdr);
  border-radius: 2px;
  color: var(--accent);
  background: var(--accent-dim);
}

.stag-green {
  border-color: var(--green-bdr);
  color: var(--green);
  background: var(--green-dim);
}


/* ── OPEN SOURCE ─────────────────────────────────── */

#opensource { background: var(--navy); }

.oss-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.oss-card {
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2rem 2.25rem;
  background: var(--navy-2);
  position: relative;
  overflow: hidden;
  transition: border-color 0.25s;
}

.oss-card:hover { border-color: var(--accent-bdr); }

.oss-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: var(--accent);
  opacity: 0.5;
}

.oss-name {
  font-family: var(--display);
  font-size: 30px;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

.oss-subtitle {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.oss-body {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--text-mid);
  line-height: 1.85;
  margin-bottom: 1.5rem;
}

.oss-links { display: flex; gap: 0.75rem; flex-wrap: wrap; }

.oss-link {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--accent);
  text-decoration: none;
  border: 1px solid var(--accent-bdr);
  padding: 4px 12px;
  border-radius: 2px;
  transition: background 0.2s;
}

.oss-link:hover { background: var(--accent-dim); }


/* ── WORK ────────────────────────────────────────── */

#work { background: var(--navy-2); }

.work-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.work-card {
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  transition: border-color 0.25s;
}

.work-card:hover { border-color: var(--accent-bdr); }

.work-visual {
  height: 342px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.wv-wind  { background: linear-gradient(135deg, #030e20 0%, #052a1a 50%, #083828 100%); }
.wv-wave  { background: linear-gradient(135deg, #030e20 0%, #0a2a4a 50%, #003355 100%); }
.wv-space { background: linear-gradient(135deg, #050f22 0%, #0d1e38 50%, #081830 100%); }
.wv-wind2 { background: linear-gradient(135deg, #030d1c 0%, #071e3a 50%, #0a3040 100%); }

.wv-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: rgba(0, 212, 255, 0.35);
  text-transform: uppercase;
}

.work-info { padding: 1.5rem; background: var(--navy); }

.work-client {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--green);
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.work-title {
  font-family: var(--display);
  font-size: 18px;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  line-height: 1.15;
}

.work-desc {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--text-mid);
  line-height: 1.75;
  margin-bottom: 1rem;
}

.work-links { display: flex; gap: 0.6rem; flex-wrap: wrap; }

.work-link {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--accent);
  text-decoration: none;
  border: 1px solid var(--accent-bdr);
  padding: 3px 10px;
  border-radius: 2px;
  transition: background 0.2s;
}

.work-link:hover { background: var(--accent-dim); }


/* ── ABOUT ───────────────────────────────────────── */

#about { background: var(--navy); }

.about-layout {
  display: grid;
  grid-template-columns: 1fr 1.7fr;
  gap: 5rem;
  align-items: start;
}

.about-photo {
  width: 100%;
  aspect-ratio: 3/4;
  display: block;
  border-radius: 4px;
  border: 1px solid var(--border);
  object-fit: cover;
  object-position: center top;
}

.about-bio {
  font-family: var(--mono);
  font-size: 15px;
  color: var(--text-mid);
  line-height: 1.9;
  margin-bottom: 1.25rem;
}

.about-bio strong { color: var(--text); font-weight: 500; }

.about-links { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2rem; }

.about-link {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-mid);
  text-decoration: none;
  border: 1px solid var(--border);
  padding: 0.5rem 1rem;
  border-radius: 2px;
  transition: color 0.2s, border-color 0.2s;
}

.about-link:hover { color: var(--accent); border-color: var(--accent-bdr); }


/* ── PUBLICATIONS ────────────────────────────────── */

#publications { background: var(--navy-2); }

.pub-list {
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  max-width: 880px;
}

.pub-item {
  display: grid;
  grid-template-columns: 72px 1fr auto;
  gap: 1.5rem;
  align-items: center;
  padding: 1.2rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--navy);
  transition: background 0.2s;
}

.pub-item:last-child { border-bottom: none; }
.pub-item:hover { background: var(--navy-3); }

.pub-year {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
  letter-spacing: 0.08em;
}

.pub-title {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--text);
}

.pub-journal {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-mid);
  margin-top: 3px;
}

.pub-link {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--accent);
  text-decoration: none;
  white-space: nowrap;
  padding: 4px 10px;
  border: 1px solid var(--accent-bdr);
  border-radius: 2px;
  transition: background 0.2s;
}

.pub-link:hover { background: var(--accent-dim); }

.pub-more {
  display: block;
  text-align: center;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-mid);
  padding: 1rem;
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 4px 4px;
  text-decoration: none;
  max-width: 880px;
  transition: color 0.2s, border-color 0.2s;
}

.pub-more:hover { color: var(--accent); border-color: var(--accent-bdr); }


/* ── CONTACT ─────────────────────────────────────── */

#contact { background: var(--navy); border-top: 1px solid var(--border); }

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.contact-detail { display: flex; flex-direction: column; gap: 1rem; margin-top: 2rem; }

.contact-row { display: flex; gap: 1rem; align-items: baseline; }

.contact-key {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--text-dim);
  text-transform: uppercase;
  min-width: 60px;
}

.contact-val { font-family: var(--mono); font-size: 14px; color: var(--text-mid); }
.contact-val a { color: var(--accent); text-decoration: none; }

.contact-form { display: flex; flex-direction: column; gap: 1rem; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

.form-field { display: flex; flex-direction: column; gap: 0.4rem; }

.form-field label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--text-dim);
  text-transform: uppercase;
}

.form-field input,
.form-field textarea,
.form-field select {
  background: var(--navy-3);
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--text);
  font-family: var(--mono);
  font-size: 14px;
  padding: 0.7rem 0.9rem;
  outline: none;
  transition: border-color 0.2s;
  resize: none;
  -webkit-appearance: none;
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus { border-color: var(--accent-bdr); }

.form-field input::placeholder,
.form-field textarea::placeholder { color: var(--text-dim); }


/* ── FOOTER ──────────────────────────────────────── */

footer {
  background: var(--navy-2);
  border-top: 1px solid var(--border);
  padding: 2rem 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-logo {
  font-family: var(--display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--text-dim);
  text-transform: uppercase;
}

.footer-note {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-dim);
  text-align: right;
  line-height: 1.8;
  max-width: 480px;
}


/* ── SCROLL REVEAL ───────────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.visible { opacity: 1; transform: none; }


/* ── RESPONSIVE ──────────────────────────────────── */

@media (max-width: 900px) {
  nav { padding: 1.25rem 1.5rem; }
  .nav-links { display: none; }
  section, #testimonial { padding: 4rem 1.5rem; }
  .testimonial-layout { grid-template-columns: 1fr; gap: 2rem; }
  #hero { padding: 5rem 1.5rem 3rem; }
  .hero-video-box { margin-bottom: 2rem; }
  #credibility { padding: 1.5rem; }
  .services-grid,
  .oss-grid,
  .work-grid { grid-template-columns: 1fr; }
  .about-layout { grid-template-columns: 1fr; gap: 2.5rem; }
  .about-photo { aspect-ratio: 1/1; }
  .contact-layout { grid-template-columns: 1fr; gap: 3rem; }
  .form-row { grid-template-columns: 1fr; }
  footer { flex-direction: column; gap: 1rem; text-align: center; }
  .footer-note { text-align: center; }
  .cred-inner { gap: 1.5rem; }
  .pub-item { grid-template-columns: 56px 1fr; }
  .pub-link { display: none; }
}


/* ── VIDEO BOX ───────────────────────────────────── */

.hero-video-box {
  position: relative;
  z-index: 3;
  width: 100%;
  max-width: 820px;
  margin: 0 auto 3rem;
  border: 1px solid var(--accent-bdr);
  border-radius: 4px;
  overflow: hidden;
  background: var(--navy-3);
}

.hero-video-box video {
  width: 100%;
  height: auto;
  display: block;
}

.hero-video-box-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: rgba(0,212,255,0.3);
  text-transform: uppercase;
  position: absolute;
  inset: 0;
}

/* Thin accent line above the box */
.hero-video-box::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(to right, var(--accent), transparent);
  z-index: 1;
}

/* ── CONTACT FORM ─────────────────────────────── */
.form-required { color: var(--accent); font-size: 0.85em; }

#form-result {
  padding: 0.85rem 1.2rem;
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.6;
}
#form-result.result-ok {
  background: var(--green-dim);
  border: 1px solid var(--green-bdr);
  color: var(--green);
}
#form-result.result-err {
  background: rgba(255,80,80,0.08);
  border: 1px solid rgba(255,80,80,0.25);
  color: #ff8080;
}
.form-field input.field-error,
.form-field textarea.field-error {
  border-color: rgba(255,80,80,0.5);
}

.wv-twophase {
  background: url('twophaseflow.png') center/cover no-repeat;
}

.wv-floatlab {
  background: url('windturbine.jpg') center/cover no-repeat;
}

.wv-porousiso {
  background: url('porousisoadvector.png') center/cover no-repeat;
}

.wv-floatstep {
  background: url('mooredbox.png') center/cover no-repeat;
}