/* ======================================================
   PHANTOM THERAPEUTICS — SHARED STYLESHEET
   ====================================================== */

/* RESET & VARIABLES */
:root {
  --ink: #080b10;
  --deep: #0d1117;
  --slate: #161b26;
  --panel: #1c2231;
  --silver-dark: #5a6580;
  --silver: #8d99b0;
  --silver-light: #b8c2d4;
  --silver-bright: #d4dce8;
  --cloud: #eef1f6;
  --white: #f7f8fb;
  --pure: #ffffff;
  --phantom: #00d2be;
  --phantom-deep: #00a89a;
  --phantom-glow: rgba(0, 210, 190, 0.12);
  --phantom-glow-strong: rgba(0, 210, 190, 0.25);
  --amber: #e8a840;
}

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

html {
  scroll-behavior: smooth;
  background: var(--ink);
  overflow-x: hidden;
}

body {
  font-family: 'DM Sans', sans-serif;
  color: var(--silver-light);
  background: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ===================== NAV ===================== */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 9999;
  padding: 1.5rem 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  backdrop-filter: blur(24px);
  background: rgba(8, 11, 16, 0.75);
  border-bottom: 1px solid rgba(0, 210, 190, 0.08);
  transition: all 0.4s ease;
}

.logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--pure);
  text-decoration: none;
}

.logo span { color: var(--phantom); }

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--silver);
  text-decoration: none;
  position: relative;
  transition: color 0.3s ease;
}

.nav-links a.active { color: var(--pure); }

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

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

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--pure);
  margin: 5px 0;
  transition: all 0.3s ease;
}

/* ===================== SHARED SECTION STYLES ===================== */
section { padding: 8rem 2rem; position: relative; }
.container { max-width: 900px; margin: 0 auto; }
.container-wide { max-width: 1100px; margin: 0 auto; }

.section-label {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--phantom);
  margin-bottom: 1rem;
}

.section-label-dark { color: var(--phantom-deep); }

.section-title {
  font-family: 'Cormorant Garamond', serif;
  font-weight: 600;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.2;
  margin-bottom: 3rem;
}

.section-title.on-dark { color: var(--pure); }
.section-title.on-light { color: var(--slate); }

/* RESEARCH BADGE */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.4rem 1rem;
  border-radius: 20px;
  margin-bottom: 2rem;
}

.badge.on-light {
  color: var(--phantom-deep);
  background: rgba(0,210,190,0.08);
  border: 1px solid rgba(0,210,190,0.15);
}

.badge.on-dark {
  color: var(--phantom);
  background: rgba(0,210,190,0.06);
  border: 1px solid rgba(0,210,190,0.12);
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--phantom);
  animation: badgePulse 2s ease-in-out infinite;
  display: inline-block;
}

/* ===================== GRID OVERLAY ===================== */
.grid-overlay::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,210,190,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,210,190,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

/* ===================== CTA BUTTON ===================== */
.cta-btn {
  display: inline-block;
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--phantom);
  padding: 1rem 2.5rem;
  border-radius: 4px;
  text-decoration: none;
  transition: all 0.3s ease;
  position: relative;
  border: none;
  cursor: pointer;
}

.cta-btn:hover {
  background: var(--phantom-deep);
  color: var(--pure);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--phantom-glow-strong);
}

.cta-btn-outline {
  display: inline-block;
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--phantom);
  background: transparent;
  padding: 1rem 2.5rem;
  border-radius: 4px;
  text-decoration: none;
  transition: all 0.3s ease;
  border: 1px solid rgba(0, 210, 190, 0.3);
}

.cta-btn-outline:hover {
  background: rgba(0, 210, 190, 0.06);
  border-color: var(--phantom);
  transform: translateY(-2px);
}

/* ===================== FOOTER ===================== */
footer {
  padding: 4rem 2rem 3rem;
  background: var(--ink);
  border-top: 1px solid rgba(0, 210, 190, 0.06);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
}

.footer-brand .logo {
  display: inline-block;
  margin-bottom: 1rem;
}

.footer-brand p {
  font-size: 0.85rem;
  font-weight: 300;
  color: var(--silver-dark);
  max-width: 300px;
  line-height: 1.6;
}

.footer-col h4 {
  font-family: 'Syne', sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--silver-light);
  margin-bottom: 1.2rem;
}

.footer-col a {
  display: block;
  font-size: 0.85rem;
  font-weight: 300;
  color: var(--silver-dark);
  text-decoration: none;
  margin-bottom: 0.6rem;
  transition: color 0.3s;
}

.footer-col a:hover { color: var(--phantom); }

.footer-bottom {
  max-width: 1100px;
  margin: 3rem auto 0;
  padding-top: 2rem;
  border-top: 1px solid rgba(0, 210, 190, 0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.72rem;
  color: var(--silver-dark);
  letter-spacing: 0.03em;
}

/* ===================== ANIMATIONS ===================== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0% { opacity: 0.5; transform: translateX(-50%) scale(1); }
  100% { opacity: 0.8; transform: translateX(-50%) scale(1.12); }
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

@keyframes badgePulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

@keyframes scanDown {
  0% { top: 0; opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}

/* REVEAL */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===================== RESPONSIVE ===================== */
@media (max-width: 768px) {
  nav { padding: 1rem 1.5rem; }

  .nav-toggle { display: block; }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    flex-direction: column;
    background: rgba(8, 11, 16, 0.95);
    padding: 1.5rem 2rem;
    gap: 1.2rem;
    border-bottom: 1px solid rgba(0, 210, 190, 0.08);
  }

  .nav-links.open { display: flex; }

  section { padding: 5rem 1.5rem; }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .logo { font-size: 0.9rem; letter-spacing: 0.2em; }
}