/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-primary:    #080d1a;
  --bg-secondary:  #0d1526;
  --bg-card:       #111d35;
  --accent:        #00c2ff;
  --accent-dim:    #0077a8;
  --accent-glow:   rgba(0,194,255,0.15);
  --green:         #00e5a0;
  --orange:        #ff8c42;
  --text-primary:  #e8f0fe;
  --text-muted:    #7a8fad;
  --border:        rgba(0,194,255,0.12);
  --radius:        10px;
  --font:          'Inter', 'Segoe UI', sans-serif;
}

html { scroll-behavior: smooth; }

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

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--accent-dim); border-radius: 3px; }

/* ===== TYPOGRAPHY ===== */
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 600; }
p  { color: var(--text-muted); }

.accent    { color: var(--accent); }
.highlight { background: linear-gradient(135deg, var(--accent), var(--green)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }

/* ===== NAV ===== */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 6%;
  background: rgba(8,13,26,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-weight: 700; font-size: 1.1rem;
  color: var(--accent); text-decoration: none;
  letter-spacing: 0.02em;
}

.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a {
  color: var(--text-muted); text-decoration: none;
  font-size: 0.9rem; font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--accent); }

.nav-menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  background: rgba(0,194,255,0.06);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
}
.nav-menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 999px;
  transition: transform 0.2s, opacity 0.2s;
}
.nav-menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.nav-menu-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Language toggle */
.lang-toggle {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.lang-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-glow);
}
.lang-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ===== SECTIONS ===== */
section { padding: 6rem 6%; }
.section-label {
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.15em;
  text-transform: uppercase; color: var(--accent);
  margin-bottom: 0.75rem;
}
.section-title { margin-bottom: 0.5rem; }
.section-subtitle { color: var(--text-muted); max-width: 580px; margin-bottom: 3rem; }
.section-heading-row {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 0.55fr);
  gap: 2rem;
  align-items: end;
  margin-bottom: 3rem;
}
.section-heading-row .section-subtitle { margin-bottom: 0; }

/* ===== HERO ===== */
#hero {
  min-height: 100vh;
  display: flex; flex-direction: column; justify-content: center;
  position: relative; overflow: hidden;
  padding-top: 6rem;
}

.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(0,194,255,0.08) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 80% 60%, rgba(0,229,160,0.05) 0%, transparent 60%);
}

.hero-grid {
  position: absolute; inset: 0; z-index: 0;
  background-image:
    linear-gradient(rgba(0,194,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,194,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.75fr);
  gap: 4rem;
  align-items: center;
}

.hero-content { max-width: 780px; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: var(--accent-glow); border: 1px solid var(--border);
  padding: 0.35rem 0.9rem; border-radius: 999px;
  font-size: 0.8rem; font-weight: 600; color: var(--accent);
  margin-bottom: 1.5rem;
}
.hero-badge::before {
  content: ''; width: 6px; height: 6px;
  background: var(--green); border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%,100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.5; transform: scale(1.4); }
}

.hero-title { margin-bottom: 1.25rem; }
.hero-desc {
  font-size: 1.1rem; color: var(--text-muted);
  max-width: 560px; margin-bottom: 2.5rem; line-height: 1.7;
}

.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }

.btn {
  padding: 0.75rem 1.75rem; border-radius: var(--radius);
  font-size: 0.9rem; font-weight: 600;
  cursor: pointer; text-decoration: none;
  display: inline-flex; align-items: center; gap: 0.4rem;
  transition: all 0.2s;
}
.btn-primary {
  background: var(--accent); color: #080d1a;
  border: 2px solid var(--accent);
}
.btn-primary:hover { background: #33ccff; border-color: #33ccff; transform: translateY(-2px); }

.btn-secondary {
  background: transparent; color: var(--text-primary);
  border: 2px solid var(--border);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

.hero-stats {
  display: flex; gap: 3rem; margin-top: 4rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border);
  position: relative; z-index: 1;
}
.stat-value { font-size: 2rem; font-weight: 800; color: var(--accent); line-height: 1; }
.stat-label { font-size: 0.8rem; color: var(--text-muted); margin-top: 0.3rem; }

.hero-visual {
  display: grid;
  gap: 1rem;
  min-width: 0;
}
.hero-visual-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(0,194,255,0.2);
  border-radius: 16px;
  background: var(--bg-card);
  box-shadow: 0 22px 70px rgba(0,0,0,0.3);
}
.hero-visual-frame img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  object-position: center top;
  background: #fff;
}
.hero-visual-caption {
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  display: grid;
  gap: 0.1rem;
  padding: 0.8rem 1rem;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 10px;
  background: rgba(8,13,26,0.82);
  backdrop-filter: blur(10px);
}
.hero-visual-caption span {
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.hero-visual-caption strong {
  color: var(--text-primary);
  font-size: 0.95rem;
}
.proof-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}
.proof-strip div {
  min-width: 0;
  padding: 0.85rem;
  background: rgba(17,29,53,0.82);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.proof-strip strong {
  display: block;
  color: var(--accent);
  font-size: 1rem;
  line-height: 1.1;
}
.proof-strip span {
  display: block;
  color: var(--text-muted);
  font-size: 0.72rem;
  margin-top: 0.25rem;
}

/* ===== IMPACT ===== */
#impact {
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}
.impact-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}
.impact-card {
  min-height: 260px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.5rem;
  background:
    linear-gradient(180deg, rgba(0,194,255,0.02), rgba(0,229,160,0.04)),
    var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s, transform 0.2s;
}
.impact-card:hover {
  border-color: rgba(0,194,255,0.45);
  transform: translateY(-4px);
}
.impact-kicker {
  color: var(--green);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.impact-card h3 {
  font-size: 1.25rem;
  line-height: 1.35;
  margin-bottom: 0.75rem;
}
.impact-card p {
  font-size: 0.9rem;
  line-height: 1.7;
}
.signal-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 1.5rem;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--border);
}
.signal-row div {
  min-width: 0;
  padding: 1rem 1.25rem;
  background: rgba(8,13,26,0.75);
}
.signal-row strong {
  display: block;
  color: var(--accent);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.35rem;
}
.signal-row span {
  display: block;
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.55;
}

/* ===== ABOUT ===== */
#about { background: var(--bg-secondary); }
.about-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: start;
}
.about-text p { margin-bottom: 1rem; line-height: 1.8; }
.about-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1.5rem; }
.tag {
  background: var(--accent-glow); border: 1px solid var(--border);
  color: var(--accent); font-size: 0.78rem; font-weight: 600;
  padding: 0.3rem 0.75rem; border-radius: 999px;
}

.value-cards { display: grid; gap: 1rem; }
.value-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.25rem 1.5rem;
  transition: border-color 0.2s, transform 0.2s;
}
.value-card:hover { border-color: var(--accent); transform: translateX(4px); }
.value-card h4 { font-size: 0.85rem; font-weight: 700; color: var(--accent); margin-bottom: 0.35rem; }
.value-card p { font-size: 0.85rem; }

/* ===== SKILLS ===== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}
.skill-category {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.5rem;
}
.skill-category h3 { font-size: 0.85rem; color: var(--accent); margin-bottom: 1rem; letter-spacing: 0.08em; text-transform: uppercase; }
.skill-items { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.skill-item {
  background: rgba(0,194,255,0.06); border: 1px solid rgba(0,194,255,0.15);
  color: var(--text-primary); font-size: 0.8rem; font-weight: 500;
  padding: 0.3rem 0.7rem; border-radius: 6px;
}
.skill-item.primary { background: rgba(0,194,255,0.15); border-color: var(--accent); color: var(--accent); }

/* ===== EXPERIENCE ===== */
#experience { background: var(--bg-secondary); }
.timeline { position: relative; padding-left: 2rem; }
.timeline::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0;
  width: 2px; background: linear-gradient(to bottom, var(--accent), transparent);
}
.timeline-item {
  position: relative; margin-bottom: 2.5rem; padding-left: 1.5rem;
}
.timeline-item::before {
  content: ''; position: absolute; left: -2.6rem; top: 0.4rem;
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 10px var(--accent);
}
.timeline-date { font-size: 0.78rem; color: var(--accent); font-weight: 700; margin-bottom: 0.25rem; }
.timeline-role { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.1rem; }
.timeline-company { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0.75rem; }
.timeline-desc { font-size: 0.875rem; line-height: 1.7; }
.timeline-desc li { margin-bottom: 0.4rem; color: var(--text-muted); }

/* ===== PROCESS ===== */
#process { background: var(--bg-primary); }
.process-rail {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  counter-reset: process;
}
.process-step {
  position: relative;
  min-height: 260px;
  padding: 1.35rem;
  background: rgba(17,29,53,0.78);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.process-step::before {
  content: '';
  position: absolute;
  left: 1.35rem;
  right: 1.35rem;
  top: 4.5rem;
  height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
}
.process-num {
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  margin-bottom: 2.3rem;
}
.process-step h3 {
  font-size: 1rem;
  line-height: 1.35;
  margin-bottom: 0.65rem;
}
.process-step p {
  font-size: 0.85rem;
  line-height: 1.65;
}

/* ===== DEMO PROJECT ===== */
.demo-intro {
  display: grid; grid-template-columns: 1fr 1fr; gap: 3rem;
  margin-bottom: 3rem; align-items: center;
}
.demo-stack { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1rem; }

/* ----- Repo callout ----- */
.repo-callout {
  display: grid; grid-template-columns: 1fr auto; gap: 2.5rem;
  background: linear-gradient(135deg, rgba(0,194,255,0.06), rgba(0,229,160,0.04));
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 2rem;
  margin-bottom: 2rem;
  align-items: center;
}
.repo-callout-text { min-width: 0; }
.repo-callout-actions {
  display: flex; flex-direction: column; gap: 0.75rem;
  min-width: 200px;
}

.repo-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 0.75rem; margin-top: 0.5rem;
}
.repo-stat {
  background: rgba(8,13,26,0.6);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 0.75rem;
  display: flex; flex-direction: column; gap: 0.15rem;
}
.repo-stat-num {
  color: var(--accent);
  font-weight: 800; font-size: 1.05rem;
  line-height: 1.1;
}
.repo-stat-label {
  color: var(--text-muted);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}

/* ----- Showcase grid (real notebook figures) ----- */
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-bottom: 1rem;
}
.showcase-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  display: flex; flex-direction: column;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.showcase-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,194,255,0.08);
}
.showcase-card img {
  width: 100%; height: 200px;
  object-fit: cover; object-position: center top;
  background: #fff;
  border-bottom: 1px solid var(--border);
  display: block;
}
.showcase-body {
  padding: 1.1rem 1.25rem 1.25rem;
}
.showcase-body h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}
.showcase-body p {
  font-size: 0.82rem;
  line-height: 1.55;
  color: var(--text-muted);
}
.showcase-card--ghost {
  background: linear-gradient(135deg, rgba(0,194,255,0.04), rgba(0,229,160,0.03));
  border-style: dashed;
}
.showcase-card--ghost:hover {
  background: linear-gradient(135deg, rgba(0,194,255,0.08), rgba(0,229,160,0.05));
}

.chart-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem;
  margin-bottom: 1.5rem;
}
.chart-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.25rem;
  transition: border-color 0.2s;
}
.chart-card:hover { border-color: rgba(0,194,255,0.3); }
.chart-card h3 { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); margin-bottom: 1rem; }
.chart-card.wide { grid-column: span 2; }
.chart-loading {
  min-height: 100%;
  display: grid;
  place-items: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  border: 1px dashed var(--border);
  border-radius: 8px;
  background: rgba(0,194,255,0.03);
}

/* ===== ARCHITECTURE ===== */
#architecture { background: var(--bg-secondary); }
.arch-diagram {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 2rem; overflow-x: auto;
}
.arch-row {
  display: flex; gap: 1rem; align-items: center;
  margin-bottom: 1.5rem; flex-wrap: wrap;
}
.arch-stage {
  background: rgba(0,194,255,0.06); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 0.75rem 1.25rem;
  text-align: center; min-width: 120px; flex: 1;
}
.arch-stage .stage-icon { font-size: 1.5rem; margin-bottom: 0.25rem; }
.arch-stage .stage-name { font-size: 0.78rem; font-weight: 700; color: var(--accent); }
.arch-stage .stage-tech { font-size: 0.7rem; color: var(--text-muted); margin-top: 0.2rem; }
.arch-arrow {
  color: var(--accent); font-size: 1.2rem; flex-shrink: 0;
}
.arch-label {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-muted);
  margin-bottom: 0.75rem;
}

/* ===== CONTACT ===== */
#contact { text-align: center; }
.role-fit {
  max-width: 980px;
  margin: 0 auto 1.5rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--border);
  text-align: left;
}
.role-fit div {
  min-width: 0;
  padding: 1rem 1.15rem;
  background: rgba(17,29,53,0.78);
}
.role-fit span {
  display: block;
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.35rem;
}
.role-fit strong {
  display: block;
  color: var(--text-primary);
  font-size: 0.88rem;
  line-height: 1.45;
}
.contact-card {
  max-width: 560px; margin: 0 auto;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 16px; padding: 3rem;
}
.contact-links { display: flex; justify-content: center; gap: 1.5rem; margin-top: 2rem; flex-wrap: wrap; }
.contact-link {
  display: flex; align-items: center; gap: 0.5rem;
  color: var(--text-muted); text-decoration: none;
  font-size: 0.9rem; font-weight: 500;
  padding: 0.6rem 1.2rem; border-radius: 8px;
  border: 1px solid var(--border);
  transition: all 0.2s;
}
.contact-link:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-2px); }

/* ===== FOOTER ===== */
footer {
  text-align: center; padding: 2rem 6%;
  border-top: 1px solid var(--border);
  font-size: 0.8rem; color: var(--text-muted);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  section { padding: 4rem 5%; }
  nav { gap: 0.75rem; }
  .nav-menu-toggle { display: inline-flex; order: 2; }
  .lang-toggle { order: 3; padding: 0.35rem 0.7rem; font-size: 0.72rem; }
  .nav-links {
    position: absolute;
    top: calc(100% + 1px);
    left: 0;
    right: 0;
    display: grid;
    gap: 0;
    padding: 0.75rem 5% 1rem;
    background: rgba(8,13,26,0.96);
    border-bottom: 1px solid var(--border);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s, transform 0.2s;
  }
  .nav-links.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-links a {
    display: block;
    padding: 0.75rem 0;
    font-size: 0.95rem;
  }
  .section-heading-row { grid-template-columns: 1fr; gap: 0.75rem; }
  .hero-inner { grid-template-columns: 1fr; gap: 2rem; }
  .hero-visual { order: 2; }
  .impact-grid { grid-template-columns: 1fr; }
  .impact-card { min-height: 220px; }
  .signal-row { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .process-rail { grid-template-columns: 1fr; }
  .process-step { min-height: auto; }
  .demo-intro  { grid-template-columns: 1fr; }
  .chart-grid  { grid-template-columns: 1fr; }
  .chart-card.wide { grid-column: span 1; }
  .hero-stats  { gap: 2rem; flex-wrap: wrap; }
  .repo-callout { grid-template-columns: 1fr; gap: 1.5rem; padding: 1.5rem; }
  .repo-callout-actions { flex-direction: row; min-width: 0; flex-wrap: wrap; }
  .repo-callout-actions .btn { flex: 1; }
  .showcase-grid { grid-template-columns: 1fr; }
  .proof-strip { grid-template-columns: 1fr; }
  .chart-card.wide[style] { grid-template-columns: 1fr !important; }
  .role-fit { grid-template-columns: 1fr; }
}

@media (max-width: 1080px) {
  .nav-links { gap: 1rem; }
  .nav-links a { font-size: 0.82rem; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { max-width: 680px; }
  .impact-grid { grid-template-columns: 1fr; }
  .process-rail { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 768px) {
  .process-rail { grid-template-columns: 1fr; }
}