/* ============================================================
   RESONANCE 360 — DESIGN SYSTEM & GLOBAL STYLES
   ============================================================ */

/* ── Custom Properties ───────────────────────────────────── */
:root {
  /* Colours */
  --navy:         #0A1628;
  --navy-mid:     #112240;
  --navy-light:   #1E3A5F;
  --teal:         #0D9488;
  --teal-hover:   #0F766E;
  --teal-dim:     rgba(13, 148, 136, 0.12);
  --white:        #FFFFFF;
  --off-white:    #F8FAFC;
  --grey-100:     #F1F5F9;
  --grey-200:     #E2E8F0;
  --grey-400:     #94A3B8;
  --grey-600:     #475569;
  --grey-800:     #1E293B;
  --text-dark:    #0F172A;
  --text-mid:     #334155;
  --text-muted:   #64748B;

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  /* Layout */
  --container-max:     1160px;
  --container-pad:     1.5rem;
  --nav-height:        72px;

  /* Spacing scale */
  --sp-1:  0.25rem;
  --sp-2:  0.5rem;
  --sp-3:  0.75rem;
  --sp-4:  1rem;
  --sp-5:  1.25rem;
  --sp-6:  1.5rem;
  --sp-8:  2rem;
  --sp-10: 2.5rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-20: 5rem;
  --sp-24: 6rem;

  /* Radii */
  --r-sm:  4px;
  --r-md:  8px;
  --r-lg:  12px;
  --r-xl:  20px;

  /* Transitions */
  --t-fast:   150ms ease;
  --t-base:   250ms ease;
  --t-slow:   400ms cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

/* ── Container ───────────────────────────────────────────── */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  width: 100%;
}

/* ── Section labels (mono, teal) ─────────────────────────── */
.label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: var(--sp-3);
}

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 0.875rem 1.75rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  border-radius: var(--r-sm);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all var(--t-base);
  white-space: nowrap;
  line-height: 1;
}

.btn--teal {
  background: var(--teal);
  border-color: var(--teal);
  color: var(--white);
}
.btn--teal:hover {
  background: var(--teal-hover);
  border-color: var(--teal-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(13, 148, 136, 0.35);
}

.btn--outline-white {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.35);
  color: var(--white);
}
.btn--outline-white:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.65);
  transform: translateY(-1px);
}

.btn--outline-navy {
  background: transparent;
  border-color: var(--navy);
  color: var(--navy);
}
.btn--outline-navy:hover {
  background: var(--navy);
  color: var(--white);
  transform: translateY(-1px);
}

.btn--outline-teal {
  background: transparent;
  border-color: var(--teal);
  color: var(--teal);
}
.btn--outline-teal:hover {
  background: var(--teal);
  color: var(--white);
  transform: translateY(-1px);
}

/* ── Navigation ──────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  height: var(--nav-height);
  transition: background var(--t-base), box-shadow var(--t-base);
}

/* Homepage: transparent until scrolled */
.page-home .nav { background: transparent; }

/* All other pages: always solid */
.page-about   .nav,
.page-clinical .nav,
.page-ai       .nav,
.page-contact  .nav { background: var(--navy); }

/* Scrolled state */
.nav.is-scrolled {
  background: var(--navy) !important;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.07);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* Logo */
.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}
.nav__logo-text {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--white);
  letter-spacing: -0.015em;
}
.nav__logo-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--teal);
  flex-shrink: 0;
  margin-top: 1px;
}

/* Links */
.nav__links {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav__link {
  font-size: 0.875rem;
  font-weight: 450;
  color: rgba(255, 255, 255, 0.7);
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--r-sm);
  transition: color var(--t-fast);
  position: relative;
}
.nav__link:hover,
.nav__link.active { color: var(--white); }

.nav__link.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: var(--sp-3);
  right: var(--sp-3);
  height: 2px;
  background: var(--teal);
  border-radius: 1px;
}

.nav__link--cta {
  margin-left: var(--sp-4);
  padding: 0.5rem 1.1rem;
  border: 1px solid rgba(13, 148, 136, 0.4);
  background: rgba(13, 148, 136, 0.1);
  color: var(--teal) !important;
  border-radius: var(--r-sm);
}
.nav__link--cta:hover {
  background: rgba(13, 148, 136, 0.2);
}
.nav__link--cta.active::after { display: none; }

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--sp-2);
  z-index: 10;
}
.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  border-radius: 1px;
  transition: all var(--t-base);
}
.nav__hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger.is-open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav__hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--navy);
  overflow: hidden;
}

/* Background layers */
.hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero__bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 90% 60% at 50% -10%, rgba(13, 148, 136, 0.1) 0%, transparent 65%),
    radial-gradient(ellipse 50% 70% at 95% 100%, rgba(30, 58, 95, 0.7) 0%, transparent 60%);
}
/* Dot grid */
.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: radial-gradient(ellipse 85% 75% at 50% 50%, black 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 85% 75% at 50% 50%, black 30%, transparent 100%);
}

.hero .container {
  position: relative;
  z-index: 1;
  padding-top: var(--nav-height);
  padding-bottom: var(--sp-24);
}

.hero__content { max-width: 760px; }

.hero__label {
  opacity: 0;
  animation: fadeUp 0.6s ease forwards 0.1s;
}

.hero__heading {
  display: flex;
  flex-direction: column;
  font-size: clamp(2.4rem, 6vw, 4.25rem);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--white);
  margin-bottom: var(--sp-8);
  opacity: 0;
  animation: fadeUp 0.6s ease forwards 0.25s;
}
.hero__heading-line { display: block; }
.hero__heading-line--accent { color: var(--teal); }

.hero__mission {
  font-size: clamp(1rem, 2vw, 1.125rem);
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
  max-width: 600px;
  margin-bottom: var(--sp-10);
  opacity: 0;
  animation: fadeUp 0.6s ease forwards 0.4s;
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-4);
  opacity: 0;
  animation: fadeUp 0.6s ease forwards 0.55s;
}

/* Scroll hint */
.hero__scroll {
  position: absolute;
  bottom: var(--sp-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-2);
  color: rgba(255, 255, 255, 0.25);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  opacity: 0;
  animation: fadeIn 0.8s ease forwards 1.4s;
}
.hero__scroll svg {
  animation: arrowBounce 2s ease-in-out infinite;
}

/* ── Pillars (homepage "What We Do") ─────────────────────── */
.pillars {
  padding: var(--sp-24) 0;
  background: var(--off-white);
}

.pillars__intro {
  text-align: center;
  margin-bottom: var(--sp-16);
}
.pillars__heading {
  font-size: clamp(1.75rem, 3vw, 2.4rem);
  font-weight: 600;
  color: var(--navy);
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.pillars__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-8);
}

.pillar {
  background: var(--white);
  padding: var(--sp-12) var(--sp-10);
  border-radius: var(--r-lg);
  border: 1px solid var(--grey-200);
  display: flex;
  flex-direction: column;
  transition: transform var(--t-slow), box-shadow var(--t-slow);
}
.pillar:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.08);
}
.pillar--ai {
  border-top: 3px solid var(--teal);
}

.pillar__icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-md);
  background: var(--grey-100);
  color: var(--navy);
  margin-bottom: var(--sp-6);
}
.pillar--ai .pillar__icon {
  background: var(--teal-dim);
  color: var(--teal);
}

.pillar__label {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--sp-3);
}
.pillar__label--mono {
  font-family: var(--font-mono);
  color: var(--teal);
}

.pillar__heading {
  font-size: 1.45rem;
  font-weight: 600;
  color: var(--navy);
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: var(--sp-4);
}
.pillar__heading--mono {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 500;
}

.pillar__body {
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--text-muted);
  flex: 1;
  margin-bottom: var(--sp-8);
}

.pillar__link {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--navy);
  transition: gap var(--t-fast), color var(--t-fast);
}
.pillar__link:hover { gap: var(--sp-3); }
.pillar__link--teal { color: var(--teal); }
.pillar__link--teal:hover { color: var(--teal-hover); }

/* ── Inner page hero (shared across non-home pages) ──────── */
.page-hero {
  background: var(--navy);
  padding: calc(var(--nav-height) + var(--sp-20)) 0 var(--sp-20);
}
.page-hero .label { margin-bottom: var(--sp-4); }
.page-hero__heading {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 600;
  color: var(--white);
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--sp-6);
}
.page-hero__sub {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.58);
  max-width: 560px;
}

/* ── Divider ─────────────────────────────────────────────── */
.divider {
  height: 1px;
  background: var(--grey-200);
  margin: 0;
}

/* ── Under Construction (stub pages) ─────────────────────── */
.under-construction {
  padding: var(--sp-24) 0;
  text-align: center;
}
.under-construction__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  background: var(--teal-dim);
  border: 1px solid rgba(13, 148, 136, 0.2);
  color: var(--teal);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: var(--sp-2) var(--sp-4);
  border-radius: 100px;
  margin-bottom: var(--sp-8);
}
.under-construction__badge::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
  animation: pulse 2s ease-in-out infinite;
}
.under-construction h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  color: var(--navy);
  letter-spacing: -0.02em;
  margin-bottom: var(--sp-4);
}
.under-construction p {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 460px;
  margin: 0 auto var(--sp-8);
  line-height: 1.75;
}

/* ── Footer ──────────────────────────────────────────────── */
.footer {
  background: var(--navy);
  padding: var(--sp-12) 0 var(--sp-8);
}
.footer .container {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: start;
  gap: var(--sp-8);
}
.footer__brand {}
.footer__logo {
  display: block;
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
  letter-spacing: -0.01em;
  margin-bottom: var(--sp-2);
}
.footer__location {
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.35);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

.footer__nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-3);
}
.footer__nav a {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.45);
  transition: color var(--t-fast);
}
.footer__nav a:hover { color: var(--white); }

.footer__contact {
  text-align: right;
}
.footer__contact-label {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.3);
  margin-bottom: var(--sp-2);
}
.footer__contact-email {
  font-size: 0.875rem;
  color: var(--teal);
  transition: color var(--t-fast);
}
.footer__contact-email:hover { color: #14B8A6; }

.footer__bottom {
  grid-column: 1 / -1;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: var(--sp-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer__copy {
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.2);
}
.footer__tagline {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.15);
  letter-spacing: 0.06em;
}

/* ── Scroll Reveal ───────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* ── Keyframes ───────────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes arrowBounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(5px); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

/* ── Responsive — Tablet ─────────────────────────────────── */
@media (max-width: 900px) {
  .footer .container {
    grid-template-columns: 1fr 1fr;
  }
  .footer__contact { text-align: left; }
  .footer__nav { flex-direction: row; flex-wrap: wrap; align-items: flex-start; gap: var(--sp-4); }
  .footer__bottom { grid-column: 1 / -1; }
}

/* ── Responsive — Mobile ─────────────────────────────────── */
@media (max-width: 768px) {
  :root {
    --container-pad: 1.25rem;
  }

  /* Nav mobile */
  .nav__hamburger { display: flex; }

  .nav__links {
    position: fixed;
    top: var(--nav-height);
    left: 0; right: 0;
    background: var(--navy);
    flex-direction: column;
    align-items: stretch;
    padding: var(--sp-4) var(--sp-6) var(--sp-8);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: all var(--t-base);
    gap: 0;
    box-shadow: 0 24px 48px rgba(0,0,0,0.4);
  }
  .nav__links.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav__link {
    padding: var(--sp-6) var(--sp-4);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    font-size: 1rem;
  }
  .nav__link.active::after { display: none; }
  .nav__link--cta {
    margin-left: 0;
    margin-top: var(--sp-4);
    text-align: center;
    border-radius: var(--r-sm);
    justify-content: center;
  }

  /* Hero */
  .hero__ctas { flex-direction: column; }
  .hero__ctas .btn { justify-content: center; width: 100%; }
  .hero__scroll { display: none; }

  /* Pillars */
  .pillars { padding: var(--sp-16) 0; }
  .pillars__grid { grid-template-columns: 1fr; gap: var(--sp-6); }
  .pillar { padding: var(--sp-8) var(--sp-6); }

  /* Footer */
  .footer .container {
    grid-template-columns: 1fr;
    gap: var(--sp-8);
  }
  .footer__contact { text-align: left; }
  .footer__nav { flex-direction: row; flex-wrap: wrap; gap: var(--sp-4); }
  .footer__bottom { flex-direction: column; align-items: flex-start; gap: var(--sp-3); }
}

@media (max-width: 480px) {
  :root { --container-pad: 1rem; }
}