/* ============================================
   eWitness — Dark Editorial Design System
   Syne display + DM Sans body + DM Mono code
   ============================================ */

:root {
  --bg:          #0a0b0d;
  --bg-2:        #0f1114;
  --bg-3:        #161820;
  --surface:     #1a1d24;
  --surface-2:   #21252e;
  --border:      rgba(255,255,255,0.07);
  --border-2:    rgba(255,255,255,0.12);

  --orange:      #e85d00;
  --orange-2:    #ff7520;
  --orange-glow: rgba(232,93,0,0.25);
  --gold:        #c8932a;
  --gold-2:      #f0b24a;

  --text:        #f0f0f0;
  --text-2:      #a0a4b0;
  --text-3:      #606470;

  --font-display: 'Syne', sans-serif;
  --font-body:    'DM Sans', sans-serif;
  --font-mono:    'DM Mono', monospace;

  --radius:      12px;
  --radius-lg:   20px;
  --transition:  0.25s cubic-bezier(0.4,0,0.2,1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ---- TYPOGRAPHY ---- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}
h1 { font-size: clamp(2.8rem, 7vw, 5.5rem); }
h2 { font-size: clamp(2rem, 4.5vw, 3.2rem); }
h3 { font-size: 1.3rem; font-weight: 600; }

em { font-style: italic; color: var(--orange-2); }

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-display);
  font-size: 0.95rem; font-weight: 600;
  padding: 0.75rem 1.75rem;
  border-radius: 50px;
  transition: all var(--transition);
  cursor: pointer; border: none;
}
.btn--primary {
  background: var(--orange);
  color: #fff;
}
.btn--primary:hover {
  background: var(--orange-2);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--orange-glow);
}
.btn--ghost {
  background: transparent;
  color: var(--text-2);
  border: 1.5px solid var(--border-2);
}
.btn--ghost:hover { color: var(--text); border-color: var(--text-3); }
.btn--outline {
  background: transparent;
  color: var(--orange-2);
  border: 1.5px solid var(--orange);
}
.btn--outline:hover {
  background: var(--orange-glow);
  transform: translateY(-2px);
}
.btn--large { padding: 1rem 2.25rem; font-size: 1rem; }

/* ---- SECTION HELPERS ---- */
.section-eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem; letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--orange-2);
  margin-bottom: 1rem;
  padding: 0.3rem 0.8rem;
  border: 1px solid rgba(255,117,32,0.3);
  border-radius: 4px;
  background: rgba(255,117,32,0.06);
}
.section-header { margin-bottom: 3.5rem; }
.section-header .section-title { color: var(--text); }
.section-header--light .section-title { color: var(--text); }

/* ========================
   NAVBAR
======================== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 1.2rem 2rem;
  transition: background var(--transition), backdrop-filter var(--transition);
}
.nav.scrolled {
  background: rgba(10,11,13,0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav__inner {
  max-width: 1280px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
}
.nav__logo {
  font-family: var(--font-display);
  font-size: 1.4rem; font-weight: 400;
  display: flex; align-items: center; gap: 0.5rem;
  color: var(--text);
}
.nav__logo strong { font-weight: 800; color: var(--orange-2); }
.nav__logo-icon { font-size: 1.5rem; }
.nav__links {
  display: flex; align-items: center; gap: 2rem;
}
.nav__link {
  font-size: 0.9rem; font-weight: 500; color: var(--text-2);
  transition: color var(--transition);
  position: relative;
}
.nav__link:hover, .nav__link.active { color: var(--text); }
.nav__link.active::after {
  content: ''; position: absolute; bottom: -4px; left: 0; right: 0;
  height: 2px; background: var(--orange); border-radius: 2px;
}
.nav__cta {
  font-family: var(--font-display);
  font-size: 0.85rem; font-weight: 700;
  padding: 0.5rem 1.2rem;
  background: var(--orange);
  color: #fff; border-radius: 50px;
  transition: all var(--transition);
}
.nav__cta:hover { background: var(--orange-2); transform: translateY(-1px); }
.nav__toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.nav__toggle span {
  display: block; width: 24px; height: 2px;
  background: var(--text); border-radius: 2px;
  transition: all var(--transition);
}

/* ========================
   HERO
======================== */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 4rem;
  padding: 8rem 2rem 5rem;
  max-width: 1280px;
  margin: 0 auto;
  position: relative;
}
.hero__bg-grid {
  position: fixed; inset: 0; z-index: -2;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.5;
}
.hero__orb {
  position: fixed; border-radius: 50%;
  filter: blur(100px); z-index: -1; pointer-events: none;
}
.hero__orb--1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(232,93,0,0.15) 0%, transparent 70%);
  top: -100px; right: -150px;
}
.hero__orb--2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(200,147,42,0.08) 0%, transparent 70%);
  bottom: 100px; left: -100px;
}
.hero__inner { padding-top: 2rem; }
.hero__eyebrow { display: flex; gap: 0.75rem; margin-bottom: 1.5rem; flex-wrap: wrap; }
.hero__badge {
  font-family: var(--font-mono);
  font-size: 0.72rem; letter-spacing: 0.1em;
  padding: 0.3rem 0.8rem;
  border-radius: 4px;
  border: 1px solid var(--border-2);
  color: var(--text-2);
  background: var(--surface);
}
.hero__badge--chain {
  color: var(--gold-2);
  border-color: rgba(200,147,42,0.4);
  background: rgba(200,147,42,0.08);
}
.hero__title { margin-bottom: 1.5rem; color: var(--text); }
.hero__title-accent {
  color: var(--orange);
  font-style: italic;
  font-weight: 800;
}
.hero__sub {
  font-size: 1.1rem; color: var(--text-2);
  max-width: 480px; margin-bottom: 2.5rem;
  line-height: 1.7;
}
.hero__actions { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 3rem; }
.hero__stats {
  display: flex; align-items: center; gap: 1.5rem;
  padding: 1.25rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: fit-content;
}
.hero__stat { text-align: center; }
.hero__stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 1.1rem; font-weight: 800;
  color: var(--orange-2);
}
.hero__stat-label {
  font-family: var(--font-mono);
  font-size: 0.65rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-3);
}
.hero__stat-divider {
  width: 1px; height: 36px; background: var(--border-2);
}

/* Phone Mockup */
.hero__visual {
  display: flex; flex-direction: column;
  align-items: center; gap: 2rem;
}
.phone-mockup { position: relative; }
.phone-mockup__frame {
  width: 260px;
  background: var(--surface-2);
  border: 2px solid var(--border-2);
  border-radius: 36px;
  padding: 16px 12px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.5);
  position: relative; z-index: 1;
}
.phone-mockup__glow {
  position: absolute; inset: -20px;
  background: radial-gradient(ellipse at center, var(--orange-glow) 0%, transparent 70%);
  z-index: 0; border-radius: 50%;
}
.phone-mockup__screen {
  background: #0a0c0f;
  border-radius: 24px;
  overflow: hidden;
  aspect-ratio: 9/16;
  display: flex; flex-direction: column;
}
.phone-screen__status {
  padding: 10px 14px 6px;
  display: flex; justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.65rem; color: var(--text-2);
}
.phone-screen__viewfinder {
  flex: 1;
  position: relative;
  background: linear-gradient(145deg, #0d1117 0%, #1a1f2e 100%);
  display: flex; align-items: flex-end; justify-content: center;
  padding-bottom: 16px;
}
.viewfinder__corner {
  position: absolute; width: 20px; height: 20px;
  border-color: var(--orange);
  border-style: solid;
}
.viewfinder__corner--tl { top: 12px; left: 12px; border-width: 2px 0 0 2px; }
.viewfinder__corner--tr { top: 12px; right: 12px; border-width: 2px 2px 0 0; }
.viewfinder__corner--bl { bottom: 40px; left: 12px; border-width: 0 0 2px 2px; }
.viewfinder__corner--br { bottom: 40px; right: 12px; border-width: 0 2px 2px 0; }
.viewfinder__center {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -60%);
  width: 40px; height: 40px;
  border: 1.5px solid rgba(232,93,0,0.5);
  border-radius: 50%;
}
.viewfinder__verified {
  display: flex; align-items: center; gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.6rem; color: #4ade80;
  background: rgba(74,222,128,0.1);
  border: 1px solid rgba(74,222,128,0.3);
  padding: 4px 8px; border-radius: 20px;
  animation: pulse-green 2s ease-in-out infinite;
}
.viewfinder__check { font-size: 0.7rem; }
@keyframes pulse-green {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}
.phone-screen__controls {
  padding: 10px 20px;
  display: flex; align-items: center; justify-content: space-between;
  background: #0a0c0f;
}
.phone-screen__btn {
  width: 28px; height: 28px;
  border-radius: 6px;
  background: var(--surface);
  border: 1px solid var(--border-2);
}
.phone-screen__shutter {
  width: 52px; height: 52px; border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 20px var(--orange-glow);
  border: 3px solid rgba(255,255,255,0.2);
}

/* Chain Visual */
.hero__chain-visual {
  display: flex; align-items: center; gap: 0.5rem;
  flex-wrap: wrap; justify-content: center;
}
.chain-block {
  padding: 0.5rem 0.8rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  text-align: center;
  transition: all var(--transition);
}
.chain-block--active {
  border-color: var(--orange);
  background: rgba(232,93,0,0.08);
  box-shadow: 0 0 20px var(--orange-glow);
}
.chain-block__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.55rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-3);
}
.chain-block__hash {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem; color: var(--gold-2);
}
.chain-connector {
  color: var(--text-3); font-size: 1.2rem;
}

/* ========================
   FEATURES
======================== */
.features {
  padding: 7rem 2rem;
  background: var(--bg-2);
}
.features__inner { max-width: 1280px; margin: 0 auto; }
.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.feature-card {
  padding: 2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  animation: fadeUp 0.6s ease both;
  animation-delay: var(--delay);
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-2);
  box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}
.feature-card__icon { font-size: 2rem; margin-bottom: 1rem; }
.feature-card__title {
  font-family: var(--font-display);
  font-size: 1.1rem; font-weight: 700;
  margin-bottom: 0.75rem; color: var(--text);
}
.feature-card__desc { font-size: 0.9rem; color: var(--text-2); line-height: 1.7; }

/* ========================
   USE CASES
======================== */
.use-cases {
  padding: 7rem 2rem;
  background: linear-gradient(135deg, #0f1114 0%, #0d0f18 100%);
}
.use-cases__inner { max-width: 1280px; margin: 0 auto; }
.use-cases__grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem;
}
.use-case-card {
  padding: 2rem 1.5rem;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition);
}
.use-case-card:hover {
  transform: translateY(-4px);
  border-color: rgba(232,93,0,0.3);
}
.use-case-card__icon { font-size: 2.5rem; margin-bottom: 1rem; display: block; }
.use-case-card h3 {
  font-size: 1rem; font-weight: 700;
  margin-bottom: 0.6rem; color: var(--text);
}
.use-case-card p { font-size: 0.85rem; color: var(--text-2); line-height: 1.6; }

/* ========================
   TEASER
======================== */
.teaser { padding: 7rem 2rem; background: var(--bg); }
.teaser__inner {
  max-width: 1280px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 5rem; align-items: center;
}
.teaser__text h2 { margin-bottom: 1.25rem; }
.teaser__text p {
  color: var(--text-2); font-size: 1rem;
  line-height: 1.75; margin-bottom: 2rem;
}
.teaser__steps { display: flex; flex-direction: column; gap: 0.25rem; }
.mini-step {
  display: flex; align-items: center; gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.mini-step:hover { border-color: var(--border-2); }
.mini-step--highlight {
  border-color: var(--orange);
  background: rgba(232,93,0,0.07);
}
.mini-step__num {
  font-family: var(--font-mono);
  font-size: 0.75rem; font-weight: 500;
  color: var(--orange-2);
  min-width: 28px;
}
.mini-step__text { font-size: 0.9rem; font-weight: 500; color: var(--text); }
.mini-step__arrow {
  text-align: center; color: var(--text-3);
  font-size: 1rem; padding: 0.1rem 0;
}

/* ========================
   CTA SECTION
======================== */
.cta-section {
  padding: 6rem 2rem;
  background: linear-gradient(135deg, var(--bg-2) 0%, var(--bg-3) 100%);
  border-top: 1px solid var(--border);
}
.cta-section__inner {
  max-width: 700px; margin: 0 auto; text-align: center;
}
.cta-section h2 { margin-bottom: 1rem; }
.cta-section p { color: var(--text-2); font-size: 1.05rem; margin-bottom: 2.5rem; }
.cta-section__actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ========================
   PAGE HERO (inner pages)
======================== */
.page-hero {
  padding: 10rem 2rem 5rem;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.page-hero__inner { max-width: 800px; margin: 0 auto; }
.page-hero h1 { margin-bottom: 1.25rem; }
.page-hero p { font-size: 1.1rem; color: var(--text-2); max-width: 560px; margin: 0 auto; }

/* ========================
   PROCESS (How It Works)
======================== */
.process-section { padding: 6rem 2rem; background: var(--bg); }
.process-section__inner { max-width: 760px; margin: 0 auto; }
.process-timeline { display: flex; flex-direction: column; }
.process-step {
  display: grid; grid-template-columns: 80px 1fr;
  gap: 2rem; margin-bottom: 0;
}
.process-step__left {
  display: flex; flex-direction: column; align-items: center;
}
.process-step__num {
  font-family: var(--font-display);
  font-size: 1.5rem; font-weight: 800;
  color: var(--orange);
  width: 56px; height: 56px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(232,93,0,0.1);
  border: 1.5px solid rgba(232,93,0,0.3);
  border-radius: 50%; flex-shrink: 0;
}
.process-step__line {
  flex: 1; width: 2px;
  background: linear-gradient(180deg, rgba(232,93,0,0.4) 0%, rgba(232,93,0,0.1) 100%);
  margin: 8px 0;
  min-height: 48px;
}
.process-step__right {
  padding-bottom: 3rem;
}
.process-step--last .process-step__right { padding-bottom: 0; }
.process-step__right h3 { margin-bottom: 0.5rem; color: var(--text); }
.process-step__right p { color: var(--text-2); line-height: 1.7; }

/* Explainer & About sections */
.blockchain-explainer { padding: 6rem 2rem; background: var(--bg-2); }
.blockchain-explainer__inner { max-width: 1280px; margin: 0 auto; }
.explainer-grid {
  display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem;
}
.explainer-card {
  padding: 2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.explainer-card__icon { font-size: 2rem; margin-bottom: 1rem; }
.explainer-card h3 { margin-bottom: 0.75rem; color: var(--text); font-size: 1.1rem; }
.explainer-card p { color: var(--text-2); font-size: 0.9rem; line-height: 1.7; }

.verification-demo { padding: 6rem 2rem; background: var(--bg); }
.verification-demo__inner {
  max-width: 1100px; margin: 0 auto; text-align: center;
}
.verification-demo h2 { margin-bottom: 0.75rem; }
.verification-demo > .verification-demo__inner > p {
  color: var(--text-2); margin-bottom: 3rem;
}
.verify-steps {
  display: flex; align-items: center;
  justify-content: center; gap: 1rem;
  flex-wrap: wrap; margin-top: 2.5rem;
}
.verify-step {
  padding: 1.25rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-width: 180px; text-align: center;
  transition: all var(--transition);
}
.verify-step--result {
  border-color: rgba(74,222,128,0.4);
  background: rgba(74,222,128,0.06);
}
.verify-step__icon { font-size: 1.8rem; display: block; margin-bottom: 0.5rem; }
.verify-step p { font-size: 0.8rem; color: var(--text-2); line-height: 1.5; }
.verify-arrow { font-size: 1.5rem; color: var(--text-3); }

/* About page */
.about-mission { padding: 6rem 2rem; background: var(--bg); }
.about-mission__inner {
  max-width: 1100px; margin: 0 auto;
  display: grid; grid-template-columns: 3fr 2fr; gap: 4rem; align-items: start;
}
.about-mission__text h2 { margin-bottom: 1.5rem; }
.about-mission__text p {
  color: var(--text-2); line-height: 1.8; margin-bottom: 1rem;
}
.about-mission__callout {
  padding: 2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius);
  margin-top: 2rem;
}
.about-mission__callout blockquote {
  font-family: var(--font-display);
  font-size: 1.1rem; font-style: italic;
  color: var(--text); margin-bottom: 0.75rem; line-height: 1.5;
}
.about-mission__callout cite {
  font-family: var(--font-mono);
  font-size: 0.75rem; color: var(--text-3);
}

.about-values { padding: 6rem 2rem; background: var(--bg-2); }
.about-values__inner { max-width: 1280px; margin: 0 auto; }
.values-grid {
  display: grid; grid-template-columns: repeat(4,1fr); gap: 1.5rem;
}
.value-card {
  padding: 2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}
.value-card:hover { transform: translateY(-4px); }
.value-card__icon { font-size: 2rem; margin-bottom: 1rem; display: block; }
.value-card h3 { margin-bottom: 0.6rem; font-size: 1rem; }
.value-card p { font-size: 0.87rem; color: var(--text-2); line-height: 1.7; }

.about-institution { padding: 6rem 2rem; background: var(--bg); }
.about-institution__inner { max-width: 760px; margin: 0 auto; }
.institution-card {
  padding: 3rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
}
.institution-card h2 { margin-bottom: 1.25rem; }
.institution-card p {
  color: var(--text-2); line-height: 1.75; margin-bottom: 1rem;
}
.institution-card strong { color: var(--text); }
.institution-card__actions {
  display: flex; gap: 1rem; justify-content: center;
  flex-wrap: wrap; margin-top: 2rem;
}

/* ========================
   FOOTER
======================== */
.footer {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  padding: 4rem 2rem 0;
}
.footer__inner {
  max-width: 1280px; margin: 0 auto;
  display: grid; grid-template-columns: 2fr 1fr 1fr 2fr;
  gap: 3rem; padding-bottom: 3rem;
}
.footer__logo {
  font-family: var(--font-display);
  font-size: 1.5rem; display: block; margin-bottom: 0.5rem;
}
.footer__logo strong { color: var(--orange-2); }
.footer__tagline { color: var(--text-2); font-size: 0.9rem; margin-bottom: 0.5rem; }
.footer__cuny { font-size: 0.8rem; color: var(--text-3); }
.footer__cuny a { color: var(--orange-2); }
.footer__links h4 {
  font-family: var(--font-mono);
  font-size: 0.7rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-3);
  margin-bottom: 1.25rem;
}
.footer__links ul { display: flex; flex-direction: column; gap: 0.6rem; }
.footer__links a {
  font-size: 0.9rem; color: var(--text-2);
  transition: color var(--transition);
}
.footer__links a:hover { color: var(--text); }
.footer__contact h4 {
  font-family: var(--font-mono);
  font-size: 0.7rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-3);
  margin-bottom: 1.25rem;
}
.footer__contact p {
  font-size: 0.87rem; color: var(--text-2);
  line-height: 1.7; margin-bottom: 1.25rem;
}
.footer__btn {
  display: inline-block;
  font-size: 0.85rem; font-weight: 600;
  font-family: var(--font-display);
  color: var(--orange-2);
  border: 1px solid rgba(255,117,32,0.4);
  padding: 0.5rem 1rem; border-radius: 6px;
  transition: all var(--transition);
}
.footer__btn:hover { background: var(--orange-glow); }
.footer__bottom {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  display: flex; justify-content: space-between; align-items: center;
  max-width: 1280px; margin: 0 auto;
}
.footer__bottom p { font-size: 0.8rem; color: var(--text-3); }
.footer__blockchain-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem !important; letter-spacing: 0.1em;
  color: var(--gold-2) !important;
  border: 1px solid rgba(200,147,42,0.3);
  padding: 0.2rem 0.6rem; border-radius: 4px;
}

/* ========================
   ANIMATIONS
======================== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ========================
   RESPONSIVE
======================== */
@media (max-width: 1100px) {
  .features__grid { grid-template-columns: repeat(2,1fr); }
  .use-cases__grid { grid-template-columns: repeat(2,1fr); }
  .values-grid { grid-template-columns: repeat(2,1fr); }
  .footer__inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; padding-top: 7rem; }
  .hero__visual { display: none; }
  .teaser__inner { grid-template-columns: 1fr; gap: 3rem; }
  .about-mission__inner { grid-template-columns: 1fr; }
  .explainer-grid { grid-template-columns: 1fr; }
  .nav__links { display: none; flex-direction: column; position: fixed;
    top: 0; right: 0; bottom: 0; width: 280px; z-index: 200;
    background: var(--surface); padding: 5rem 2rem 2rem;
    border-left: 1px solid var(--border);
    transition: transform var(--transition);
    transform: translateX(100%);
  }
  .nav__links.open { display: flex; transform: translateX(0); }
  .nav__toggle { display: flex; }
  .footer__inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 560px) {
  .features__grid { grid-template-columns: 1fr; }
  .use-cases__grid { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: 1fr; }
  .footer__inner { grid-template-columns: 1fr; }
  .footer__bottom { flex-direction: column; gap: 0.75rem; }
  .hero__stats { flex-direction: column; gap: 1rem; width: 100%; }
  .hero__stat-divider { width: 100%; height: 1px; }
  .verify-steps { flex-direction: column; }
  .verify-arrow { transform: rotate(90deg); }
}

/* ========================
   RESEARCH CALLOUT (Home)
======================== */
.research-callout {
  padding: 6rem 2rem;
  background: linear-gradient(135deg, var(--bg-3) 0%, #0d0f1a 100%);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.research-callout__inner { max-width: 1280px; margin: 0 auto; }
.research-callout__badge { margin-bottom: 2rem; }
.research-callout__content {
  display: grid; grid-template-columns: 3fr 2fr; gap: 4rem; align-items: start;
}
.research-callout__paper {
  padding: 2.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius-lg);
}
.research-callout__paper h3 {
  font-size: 1.3rem; margin-bottom: 0.6rem; color: var(--text);
  line-height: 1.35;
}
.research-callout__authors {
  font-family: var(--font-mono);
  font-size: 0.8rem; color: var(--orange-2);
  margin-bottom: 0.4rem;
}
.research-callout__venue {
  font-size: 0.82rem; color: var(--text-3);
  margin-bottom: 1rem; font-style: italic;
}
.research-callout__desc {
  font-size: 0.9rem; color: var(--text-2);
  line-height: 1.75; margin-bottom: 1.25rem;
}
.research-callout__meta {
  display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.5rem;
}
.research-meta-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem; letter-spacing: 0.08em;
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--border-2);
  border-radius: 4px; color: var(--gold-2);
  background: rgba(200,147,42,0.06);
}
.research-callout__institutions {
  display: flex; flex-direction: column; gap: 1rem;
}
.inst-badge {
  display: flex; align-items: center; gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.inst-badge:hover { border-color: var(--border-2); }
.inst-badge--nsf { border-color: rgba(200,147,42,0.2); }
.inst-badge__icon { font-size: 1.5rem; flex-shrink: 0; }
.inst-badge div { display: flex; flex-direction: column; gap: 0.15rem; }
.inst-badge strong { font-size: 0.9rem; color: var(--text); font-weight: 600; }
.inst-badge span { font-family: var(--font-mono); font-size: 0.68rem; color: var(--text-3); }
.footer__algo {
  font-size: 0.82rem; color: var(--text-3); margin-bottom: 0.4rem;
}
.footer__algo strong { color: var(--orange-2); }

/* ========================
   SMARTHASH VARIANTS
======================== */
.variants-section {
  padding: 6rem 2rem;
  background: var(--bg-2);
}
.variants-section__inner { max-width: 1280px; margin: 0 auto; }
.section-sub {
  font-size: 1rem; color: var(--text-2);
  max-width: 620px; margin-top: 0.75rem; line-height: 1.7;
}
.variants-grid {
  display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem;
  margin-bottom: 1.5rem;
}
.variant-card {
  padding: 2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  position: relative; overflow: hidden;
  transition: all var(--transition);
}
.variant-card:hover { transform: translateY(-4px); }
.variant-card--best {
  border-color: var(--orange);
  background: rgba(232,93,0,0.05);
}
.variant-card__ribbon {
  position: absolute; top: 16px; right: -28px;
  background: var(--orange);
  color: #fff; font-family: var(--font-mono);
  font-size: 0.62rem; letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 40px;
  transform: rotate(35deg);
  transform-origin: center;
  box-shadow: 0 2px 8px rgba(232,93,0,0.4);
}
.variant-card__name {
  font-size: 1.1rem; margin-bottom: 0.75rem; color: var(--text);
}
.variant-card__desc {
  font-size: 0.88rem; color: var(--text-2);
  line-height: 1.7; margin-bottom: 1.5rem;
}
.variant-card__stats {
  display: flex; gap: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}
.variant-stat { display: flex; flex-direction: column; gap: 0.2rem; }
.variant-stat__val {
  font-family: var(--font-display);
  font-size: 1rem; font-weight: 700; color: var(--orange-2);
}
.variant-stat__label {
  font-family: var(--font-mono);
  font-size: 0.62rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-3);
}
.variants-note {
  font-size: 0.9rem; color: var(--text-2);
  padding: 1rem 1.25rem;
  background: rgba(200,147,42,0.06);
  border: 1px solid rgba(200,147,42,0.2);
  border-radius: var(--radius);
  max-width: 700px;
}
.variants-note strong { color: var(--gold-2); }

/* ========================
   PERFORMANCE TABLE
======================== */
.perf-section {
  padding: 6rem 2rem;
  background: var(--bg);
}
.perf-section__inner { max-width: 1100px; margin: 0 auto; }
.perf-table-wrap {
  overflow-x: auto; margin-bottom: 1.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}
.perf-table {
  width: 100%; border-collapse: collapse;
  font-size: 0.87rem;
}
.perf-table th {
  padding: 1rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.7rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-3);
  background: var(--surface);
  border-bottom: 1px solid var(--border-2);
  text-align: left; white-space: nowrap;
}
.perf-table td {
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-2);
}
.perf-table__section-header td {
  padding: 0.6rem 1.25rem;
  font-family: var(--font-display);
  font-size: 0.82rem; font-weight: 700;
  color: var(--orange-2);
  background: rgba(232,93,0,0.06);
  border-bottom: 1px solid rgba(232,93,0,0.2);
}
.perf-table__highlight td {
  background: rgba(74,222,128,0.04);
  color: var(--text);
}
.perf-table__highlight strong { color: #4ade80; }
.perf-table tr:last-child td { border-bottom: none; }
.perf-table tr:hover td { background: rgba(255,255,255,0.02); }
.perf-note {
  font-size: 0.88rem; color: var(--text-2);
  padding: 1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

/* ========================
   TEAM SECTION (About)
======================== */
.team-section {
  padding: 6rem 2rem;
  background: var(--bg);
}
.team-section__inner { max-width: 1100px; margin: 0 auto; }
.team-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 2rem; margin-bottom: 2.5rem;
}
.team-card {
  padding: 2.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}
.team-card:hover { transform: translateY(-4px); border-color: var(--border-2); }
.team-card__avatar {
  width: 64px; height: 64px; border-radius: 50%;
  background: linear-gradient(135deg, var(--orange) 0%, var(--gold) 100%);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-size: 1.8rem; font-weight: 800; color: #fff;
  margin-bottom: 1.25rem;
}
.team-card__name {
  font-size: 1.2rem; margin-bottom: 0.3rem; color: var(--text);
}
.team-card__role {
  font-family: var(--font-mono);
  font-size: 0.72rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--orange-2);
  margin-bottom: 0.4rem;
}
.team-card__affil {
  font-size: 0.87rem; color: var(--text-2);
  margin-bottom: 0.75rem; line-height: 1.5;
}
.team-card__email {
  font-family: var(--font-mono);
  font-size: 0.78rem; color: var(--text-3);
  transition: color var(--transition);
}
.team-card__email:hover { color: var(--orange-2); }
.team-acknowledgement {
  padding: 1.5rem;
  background: rgba(200,147,42,0.06);
  border: 1px solid rgba(200,147,42,0.2);
  border-radius: var(--radius);
  font-size: 0.9rem; color: var(--text-2); line-height: 1.7;
}
.team-acknowledgement strong { color: var(--gold-2); }

/* ========================
   PUBLICATION SECTION
======================== */
.publication-section {
  padding: 6rem 2rem;
  background: var(--bg-2);
}
.publication-section__inner { max-width: 1100px; margin: 0 auto; }
.publication-card {
  display: flex; gap: 2.5rem; align-items: flex-start;
  padding: 2.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.publication-card__left { flex-shrink: 0; }
.publication-card__badge {
  width: 72px; height: 72px;
  background: linear-gradient(135deg, #e00 0%, #900 100%);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-size: 1.3rem; font-weight: 800; color: #fff;
  box-shadow: 0 8px 24px rgba(200,0,0,0.25);
}
.publication-card__right h3 {
  font-size: 1.2rem; margin-bottom: 0.5rem; color: var(--text); line-height: 1.35;
}
.pub-authors {
  font-family: var(--font-mono);
  font-size: 0.8rem; color: var(--orange-2);
  margin-bottom: 0.3rem;
}
.pub-venue {
  font-size: 0.83rem; color: var(--text-3);
  font-style: italic; margin-bottom: 0.4rem;
}
.pub-doi {
  font-family: var(--font-mono);
  font-size: 0.75rem; color: var(--text-3);
  margin-bottom: 1rem;
}
.pub-doi a { color: var(--orange-2); }
.pub-doi a:hover { text-decoration: underline; }
.pub-stats {
  display: flex; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 1.25rem;
}
.pub-stat {
  font-family: var(--font-mono);
  font-size: 0.68rem; letter-spacing: 0.08em;
  padding: 0.2rem 0.7rem;
  border: 1px solid var(--border-2);
  border-radius: 4px; color: var(--gold-2);
  background: rgba(200,147,42,0.06);
}
.pub-abstract {
  font-size: 0.9rem; color: var(--text-2);
  line-height: 1.75; margin-bottom: 1.5rem;
}
.value-card__role-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--orange-2);
  margin-bottom: 0.5rem;
}
.value-card__link {
  display: inline-block; margin-top: 0.75rem;
  font-size: 0.85rem; font-weight: 600;
  color: var(--orange-2); transition: color var(--transition);
}
.value-card__link:hover { color: var(--text); }
.values-grid--3 { grid-template-columns: repeat(3,1fr); }

/* Responsive additions */
@media (max-width: 1100px) {
  .research-callout__content { grid-template-columns: 1fr; }
  .variants-grid { grid-template-columns: 1fr; }
  .values-grid--3 { grid-template-columns: repeat(2,1fr); }
  .publication-card { flex-direction: column; gap: 1.5rem; }
  .team-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .values-grid--3 { grid-template-columns: 1fr; }
}

/* ========================
   PRIVACY POLICY PAGE
======================== */
.privacy-section {
  padding: 4rem 2rem 7rem;
  background: var(--bg);
}
.privacy-section__inner {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.privacy-block {
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--border);
}
.privacy-block:last-child {
  border-bottom: none;
}
.privacy-block h2 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--orange-2);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}
.privacy-block p {
  color: var(--text-2);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 0.9rem;
}
.privacy-block p:last-child { margin-bottom: 0; }
.privacy-block ul {
  margin: 0.75rem 0 0.9rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  list-style: disc;
}
.privacy-block ul li {
  color: var(--text-2);
  font-size: 0.95rem;
  line-height: 1.75;
  padding-left: 0.25rem;
}
.privacy-block ul li::marker { color: var(--orange); }
.privacy-block strong { color: var(--text); }
.privacy-block a {
  color: var(--orange-2);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition);
}
.privacy-block a:hover { color: var(--gold-2); }

/* ========================
   LIVE BLOCKCHAIN SECTION
======================== */
.blockchain-live {
  padding: 6rem 2rem;
  background: var(--bg-2);
  border-top: 1px solid var(--border);
}
.blockchain-live__inner {
  max-width: 1280px;
  margin: 0 auto;
}
.contract-info {
  margin-bottom: 2.5rem;
}
.contract-info__card {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.contract-stat {
  flex: 1 1 200px;
  padding: 1.25rem 1.75rem;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.contract-stat:last-child { border-right: none; }
.contract-stat__label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
}
.contract-stat__address {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--orange-2);
  word-break: break-all;
  line-height: 1.5;
  transition: color var(--transition);
}
.contract-stat__address:hover { color: var(--gold-2); }
.contract-stat__val {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-2);
}
.contract-stat__val--tag {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  background: rgba(232,93,0,0.1);
  border: 1px solid rgba(232,93,0,0.3);
  border-radius: 4px;
  color: var(--orange-2);
  font-size: 0.75rem;
  width: fit-content;
}
.contract-stat__val--highlight {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--orange-2);
}
.contract-stat__link {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--orange-2);
  transition: color var(--transition);
}
.contract-stat__link:hover { color: var(--gold-2); }

.blockchain-live__embed-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  padding: 0 0.25rem;
}
.blockchain-live__open-link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--orange-2);
  letter-spacing: 0.05em;
  transition: color var(--transition);
}
.blockchain-live__open-link:hover { color: var(--gold-2); }
.blockchain-live__iframe {
  width: 100%;
  height: 640px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  display: block;
  filter: invert(0.92) hue-rotate(180deg) brightness(0.88) contrast(1.05);
}

@media (max-width: 860px) {
  .contract-info__card { flex-direction: column; }
  .contract-stat { border-right: none; border-bottom: 1px solid var(--border); }
  .contract-stat:last-child { border-bottom: none; }
  .blockchain-live__iframe { height: 480px; }
}
@media (max-width: 560px) {
  .blockchain-live__iframe { height: 380px; }
}

/* ========================
   HELP / FAQ PAGE
======================== */
.help-section {
  padding: 4rem 2rem 7rem;
  background: var(--bg);
}
.help-section__inner {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.faq-item {
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--border);
}
.faq-item:last-of-type {
  border-bottom: none;
}
.faq-item__question {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 1.25rem;
  padding-left: 1.1rem;
  border-left: 3px solid var(--orange);
  line-height: 1.4;
  letter-spacing: -0.01em;
}
.faq-item__answers {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-left: 1.1rem;
  list-style: disc;
  padding-left: 1.25rem;
}
.faq-item__answers li {
  color: var(--text-2);
  font-size: 0.95rem;
  line-height: 1.8;
}
.faq-item__answers li::marker { color: var(--orange); }
.faq-item__answers a {
  color: var(--orange-2);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition);
}
.faq-item__answers a:hover { color: var(--gold-2); }
.faq-item__answers strong { color: var(--text); }
.help-license {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 2rem;
  margin-top: 2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  flex-wrap: wrap;
}
.help-license img {
  flex-shrink: 0;
  border-radius: 4px;
}
.help-license p {
  font-size: 0.85rem;
  color: var(--text-3);
  line-height: 1.7;
}
.help-license a {
  color: var(--orange-2);
  text-decoration: underline;
  text-underline-offset: 3px;
}