/* ============================================================
   COMTRADE AI — style.css
   ============================================================ */

/* 1. CSS Custom Properties
   ============================================================ */
:root {
  --bg: #000000;
  --accent: #1BE6D1;
  --accent-dim: rgba(27, 230, 209, 0.15);
  --accent-border: rgba(27, 230, 209, 0.35);
  --text-primary: #ffffff;
  --text-muted: rgba(255, 255, 255, 0.55);
  --text-subtle: rgba(255, 255, 255, 0.35);
  --card-bg: rgba(255, 255, 255, 0.03);
  --border: rgba(255, 255, 255, 0.1);
  --radius-card: 24px;
  --radius-pill: 999px;
  --radius-arch: 200px 200px 0 0;
  --font-heading: 'DM Serif Display', 'Playfair Display', Georgia, serif;
  --font-body: 'DM Sans', 'Inter', system-ui, sans-serif;
  --nav-h: 72px;
  --max-w: 1200px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 2. Reset / Base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

ul { list-style: none; }

/* 3. Typography
   ============================================================ */
h1, h2, h3 {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(3rem, 6vw, 5.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3.75rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }

p { color: var(--text-muted); line-height: 1.7; }

/* 4. Layout Utilities
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: 48px;
}

.section { padding-block: 120px; }

.pill-label {
  display: inline-flex;
  align-items: center;
  padding: 8px 20px;
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  margin-bottom: 24px;
}

.section-header { text-align: center; margin-bottom: 72px; }
.section-header p { max-width: 560px; margin-inline: auto; margin-top: 16px; }

/* 5. Navbar
   ============================================================ */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: border var(--transition), backdrop-filter var(--transition), background var(--transition);
}

#navbar .nav-inner {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

#navbar.scrolled {
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--accent);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-logo-mark {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.nav-logo-ai {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 400;
  color: var(--accent);
  letter-spacing: -0.05em;
  line-height: 1;
}

.nav-logo-text {
  font-family: var(--font-body);
  font-size: 0.65rem;
  font-weight: 400;
  letter-spacing: 0.35em;
  color: var(--text-primary);
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width var(--transition);
}

.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { width: 100%; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--text-primary);
  transition: var(--transition);
}

/* 6. Hero
   ============================================================ */
#hero {
  min-height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: var(--nav-h);
}

/* Full-bleed background image */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transform: translateX(12%) scale(1.25);
  transform-origin: center center;
}

/* Dark overlay for text legibility */
.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: radial-gradient(ellipse 80% 100% at 50% 50%, rgba(0,0,0,0.35) 0%, rgba(0,0,0,0.65) 100%);
}

/* Dot grid on top of overlay */
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(27, 230, 209, 0.18) 1px, transparent 1px);
  background-size: 22px 22px;
  opacity: 0.4;
  pointer-events: none;
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 28px;
  max-width: 700px;
  padding: 0 32px;
}

.hero-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  margin-bottom: 20px;
}

.hero-content h1 {
  margin-bottom: 40px;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border: 1px solid var(--text-muted);
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-family: var(--font-body);
  color: var(--text-primary);
  cursor: pointer;
  background: transparent;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

.btn-outline .arrow { transition: transform var(--transition); }
.btn-outline:hover .arrow { transform: translateX(4px); }

.btn-solid {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 32px;
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: #000;
  font-weight: 600;
  font-size: 0.95rem;
  font-family: var(--font-body);
  cursor: pointer;
  border: none;
  width: 100%;
  justify-content: center;
  transition: opacity var(--transition), transform var(--transition);
}

.btn-solid:hover { opacity: 0.88; transform: translateY(-1px); }
.btn-solid .arrow { transition: transform var(--transition); }
.btn-solid:hover .arrow { transform: translateX(4px); }

/* 7. About
   ============================================================ */
#about {
  padding-block: 120px;
}

.about-icons {
  display: flex;
  justify-content: center;
  gap: 64px;
  margin-block: 64px;
  flex-wrap: wrap;
}

.about-icon-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
  max-width: 130px;
}

.about-icon-item img,
.about-icon-item svg {
  width: 48px;
  height: 48px;
}

.about-icon-item span {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.4;
}

.about-body {
  max-width: 640px;
  margin-inline: auto;
  text-align: center;
  font-size: 0.95rem;
}

/* 8. Featured Projects
   ============================================================ */
#projects {
  padding-block: 120px;
}

.projects-grid {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.project-card {
  border: 1px solid var(--accent);
  border-radius: var(--radius-card);
  background: var(--card-bg);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 380px;
  position: relative;
}

.project-card-body {
  padding: 52px 52px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  gap: 20px;
}

.project-card-body .pill-label { margin-bottom: 8px; }

/* Project tags — replaces pill-label inside project cards */
.project-tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.project-tag::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.project-tag--featured {
  background: rgba(27, 230, 209, 0.1);
  border: 1px solid rgba(27, 230, 209, 0.35);
  color: var(--accent);
}

.project-tag--featured::before {
  background: var(--accent);
  box-shadow: 0 0 6px rgba(27, 230, 209, 0.7);
}

.project-tag--case {
  background: rgba(27, 230, 209, 0.1);
  border: 1px solid rgba(27, 230, 209, 0.35);
  color: var(--accent);
}

.project-tag--case::before {
  background: var(--accent);
  box-shadow: 0 0 6px rgba(27, 230, 209, 0.7);
}

/* Visit site link inside project card */
.project-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.85rem;
  color: var(--accent);
  border-bottom: 1px solid rgba(27, 230, 209, 0.3);
  padding-bottom: 2px;
  transition: border-color var(--transition), opacity var(--transition);
  align-self: flex-start;
  margin-top: 4px;
}

.project-link:hover {
  border-color: var(--accent);
  opacity: 0.8;
}

.project-card-body h3 {
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-family: var(--font-heading);
  font-weight: 400;
}

.project-card-body p {
  font-size: 0.95rem;
  max-width: 360px;
  text-align: center;
}

.project-card-visual {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-card-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

/* HyperSharp — padlock floating over uniform card background */
.hypersharp-visual {
  background: transparent;
}

.padlock-bg {
  position: absolute !important;
  width: auto !important;
  height: 80% !important;
  object-fit: contain !important;
  right: 8% !important;
  top: 50% !important;
  transform: translateY(-50%) !important;
  filter: drop-shadow(0 0 32px rgba(27,230,209,0.25));
}

/* Squirro card — dark teal gradient on right side */
.project-card.squirro .project-card-visual {
  background: linear-gradient(135deg, #041a18 0%, #082e28 50%, #0d3d35 100%);
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  padding: 24px;
}

.arc-decoration {
  position: absolute;
  right: -40px;
  bottom: -40px;
  width: 300px;
  height: 300px;
  opacity: 0.6;
}

.arc-decoration svg { width: 100%; height: 100%; }

/* 9. Research & Publications — Accordion
   ============================================================ */
#publications {
  padding-block: 120px;
}

.accordion {
  max-width: 800px;
  margin-inline: auto;
}

/* The item wrapper has no border/overflow — it just spaces items */
.accordion-item {
  margin-bottom: 10px;
}

/* The pill lives only on the button */
.accordion-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  background: transparent;
  border: 1px solid var(--accent-border);
  border-radius: 999px;
  cursor: pointer;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 400;
  text-align: left;
  transition: border-color var(--transition), border-radius 0.3s ease,
              background var(--transition);
}

.accordion-btn:hover { border-color: var(--accent); }

/* When open: top of a card — flat bottom edge, corner radius on top only */
.accordion-item.open .accordion-btn {
  border-radius: 20px 20px 0 0;
  border-bottom-color: rgba(27, 230, 209, 0.12);
}

.accordion-arrow {
  width: 26px;
  height: 26px;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.accordion-item.open .accordion-arrow {
  transform: rotate(90deg);
}

/* Content panel: border is transparent when closed so no stray lines show */
.accordion-content {
  max-height: 0;
  overflow: hidden;
  border: 1px solid transparent;
  border-top: none;
  border-radius: 0 0 20px 20px;
  transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1),
              border-color 0.25s ease;
}

/* When open: border becomes visible and content slides in */
.accordion-item.open .accordion-content {
  max-height: 3200px;
  border-color: var(--accent-border);
}

.accordion-inner {
  padding: 24px 36px 32px;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.8;
}

.accordion-inner p { margin-bottom: 12px; }
.accordion-inner p:last-child { margin-bottom: 0; }

/* Bullet list — all sections except ABOUT use <ul> */
.accordion-inner ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 11px;
  padding: 0;
  margin: 0;
}

.accordion-inner ul li {
  padding-left: 22px;
  position: relative;
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.65;
}

.accordion-inner ul li::before {
  content: '▸';
  position: absolute;
  left: 2px;
  top: 1px;
  color: var(--accent);
  font-size: 0.7rem;
}

.accordion-inner .pub-section-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 28px 0 14px;
}

/* 10. Why Comtrade AI
   ============================================================ */
#why {
  padding-block: 120px;
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 16px;
}

.why-card {
  border-radius: var(--radius-card);
  overflow: hidden;
  position: relative;
  min-height: 480px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.why-card-img {
  position: absolute;
  inset: 0;
  object-fit: cover;
  width: 100%;
  height: 100%;
}

/* Oval clip for the image */
.why-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  height: 72%;
  border-radius: 200px 200px 0 0;
  overflow: hidden;
  z-index: 1;
  pointer-events: none;
}

.why-card-img-wrap {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 72%;
  border-radius: 200px 200px 0 0;
  overflow: hidden;
}

.why-card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Placeholder images for why cards */
.why-card-img-wrap.placeholder-scientist {
  background: linear-gradient(180deg, #1a2a28 0%, #0a1a18 100%);
}

.why-card-img-wrap.placeholder-chip {
  background: linear-gradient(180deg, #1a1a2e 0%, #0a0a1a 100%);
}

.why-card-img-wrap.placeholder-code {
  background: linear-gradient(180deg, #1a2810 0%, #0a1808 100%);
}

.why-card-body {
  position: relative;
  z-index: 2;
  padding: 28px 28px 32px;
  background: var(--bg);
}

.why-card-body h3 {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.why-card-body p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* 11. Team
   ============================================================ */
#team {
  padding-block: 120px;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  max-width: 960px;
  margin-inline: auto;
  align-items: stretch;
}

.team-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 16px;
}

.team-photo-wrap {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--accent-border);
  background: #0d1f1d;
  flex-shrink: 0;
}

.team-photo-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

.team-card h3 {
  font-size: 1.3rem;
  font-weight: 400;
}

.team-role {
  font-size: 0.875rem;
  color: var(--accent);
  margin-top: -12px;
}

.team-affiliation {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: -10px;
}

.team-btn-row {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-bio {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, #0a2a24 0%, #051510 100%);
  border: 1px solid var(--accent-border);
  font-size: 0.875rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}

.btn-bio:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.btn-linkedin {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.07);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0;
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
  flex-shrink: 0;
}

.btn-linkedin:hover {
  border-color: #0A66C2;
  color: #0A66C2;
  background: rgba(10, 102, 194, 0.1);
}

/* 12. Contact
   ============================================================ */
#contact {
  padding-block: 120px;
}

.contact-form {
  max-width: 640px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.form-field input,
.form-field textarea {
  background: transparent;
  border: 1px solid var(--accent-border);
  border-radius: 16px;
  padding: 18px 22px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition);
  resize: none;
}

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

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

.form-field input.error,
.form-field textarea.error {
  border-color: #ff4d4d;
}

.form-error-msg {
  font-size: 0.78rem;
  color: #ff4d4d;
  margin-top: 6px;
  min-height: 1em;
}

.form-field textarea { min-height: 160px; }

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.875rem;
  color: var(--text-muted);
  cursor: pointer;
}

.form-checkbox input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border: 1px solid var(--accent-border);
  border-radius: 50%;
  flex-shrink: 0;
  cursor: pointer;
  margin-top: 2px;
  transition: background var(--transition), border-color var(--transition);
}

.form-checkbox input[type="checkbox"]:checked {
  background: var(--accent);
  border-color: var(--accent);
}

.form-checkbox a { color: var(--accent); text-decoration: underline; }

/* 13. Footer
   ============================================================ */
#footer {
  border-top: 1px solid var(--border);
  padding-block: 64px 40px;
}

.footer-top {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 48px;
}

.footer-logo-col {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-address {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.footer-email {
  color: var(--accent);
  font-size: 0.875rem;
  transition: opacity var(--transition);
}

.footer-email:hover { opacity: 0.75; }

.footer-nav {
  display: flex;
  justify-content: flex-end;
  gap: 40px;
  flex-wrap: wrap;
  padding-top: 8px;
}

.footer-nav a {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer-nav a:hover { color: var(--text-primary); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border);
  padding-top: 28px;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-legal {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-subtle);
  flex-wrap: wrap;
}

.footer-legal span { color: var(--text-subtle); }
.footer-legal a { color: var(--text-subtle); transition: color var(--transition); }
.footer-legal a:hover { color: var(--text-muted); }

.footer-socials {
  display: flex;
  gap: 12px;
}

.social-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: 700;
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition);
  text-decoration: none;
}

.social-btn:hover { border-color: var(--text-muted); color: var(--text-primary); }

/* 14. Animations & Transitions
   ============================================================ */

/* Load animation */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-up.delay-1 { transition-delay: 0.1s; }
.fade-up.delay-2 { transition-delay: 0.2s; }
.fade-up.delay-3 { transition-delay: 0.3s; }
.fade-up.delay-4 { transition-delay: 0.4s; }
.fade-up.delay-5 { transition-delay: 0.5s; }

/* Hero load animation — triggered by JS adding .loaded to body */
.hero-load {
  opacity: 0;
  transform: translateY(20px);
}

body.loaded .hero-load {
  opacity: 1;
  transform: translateY(0);
}

body.loaded .hero-load-1 { transition: opacity 0.8s ease 0.2s, transform 0.8s ease 0.2s; }
body.loaded .hero-load-2 { transition: opacity 0.8s ease 0.45s, transform 0.8s ease 0.45s; }
body.loaded .hero-load-3 { transition: opacity 0.8s ease 0.65s, transform 0.8s ease 0.65s; }
body.loaded .hero-load-4 { transition: opacity 0.8s ease 0.8s, transform 0.8s ease 0.8s; }

/* 15. Bio pages
   ============================================================ */
.bio-hero {
  min-height: 50vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--nav-h) + 64px) 48px 64px;
  position: relative;
}

.bio-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(27, 230, 209, 0.2) 1px, transparent 1px);
  background-size: 22px 22px;
  opacity: 0.35;
  pointer-events: none;
}

.bio-photo-wrap {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--accent-border);
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.bio-photo-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

.bio-hero h1 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  position: relative;
  z-index: 1;
  margin-bottom: 8px;
}

.bio-role {
  color: var(--accent);
  font-size: 1rem;
  letter-spacing: 0.04em;
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.bio-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.bio-content {
  max-width: 720px;
  margin-inline: auto;
  padding: 80px 48px;
}

.bio-content p {
  margin-bottom: 20px;
  font-size: 1rem;
  line-height: 1.8;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color var(--transition);
  margin-bottom: 48px;
}

.back-link:hover { color: var(--accent); }

/* 16. Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .container { padding-inline: 32px; }
  .hero-content { padding-left: 32px; }
  .why-grid { grid-template-columns: 1fr 1fr; }
  .why-card:last-child { grid-column: 1 / -1; max-width: 460px; margin-inline: auto; }
}

@media (max-width: 768px) {
  :root { --nav-h: 60px; }
  h1 { font-size: 2.8rem; }
  h2 { font-size: 2.2rem; }
  .section { padding-block: 80px; }

  .nav-links { display: none; flex-direction: column; gap: 0; }
  .nav-links.open {
    display: flex;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: rgba(0,0,0,0.97);
    padding: 24px 32px;
    border-bottom: 1px solid var(--accent-border);
    gap: 0;
  }
  .nav-links.open a {
    display: block;
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
    font-size: 1rem;
  }
  .nav-toggle { display: flex; }

  #hero { grid-template-columns: 1fr; min-height: auto; padding-bottom: 60px; }
  .hero-content { padding: 48px 32px 0; max-width: 100%; margin: 0; }
  .hero-visual { display: none; }

  .about-icons { gap: 32px; }
  .project-card { grid-template-columns: 1fr; }
  .project-card-visual { min-height: 240px; }
  .why-grid { grid-template-columns: 1fr; }
  .why-card:last-child { grid-column: auto; max-width: 100%; }
  .team-grid { grid-template-columns: 1fr; max-width: 360px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-nav { justify-content: flex-start; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 20px; }
  .container { padding-inline: 24px; }
  .nav-inner { padding-inline: 24px; }
  .hero-content { padding-inline: 24px; }
}