/* ============================================================
   SERA DESIGN SYSTEM — styles.css
   Shared across all pages
   ============================================================ */

/* --- CSS Variables --- */
:root {
  --green: #0D9B6A;
  --green-hover: #0B8A5E;
  --green-light: #ECFDF5;
  --green-glow: rgba(13, 155, 106, 0.12);
  --green-dark: #064E3B;
  --teal: #10B981;
  --dark: #0A1A14;
  --dark-mid: #0D1F17;
  --dark-gradient: linear-gradient(180deg, #0A1A14 0%, #0D1F17 100%);

  --text-primary: #111827;
  --text-secondary: #6B7280;
  --text-muted: #9CA3AF;
  --bg-white: #FFFFFF;
  --bg-off-white: #F9FAFB;
  --bg-green-tint: #F0FDF4;

  --border: rgba(0, 0, 0, 0.06);
  --border-light: rgba(0, 0, 0, 0.04);

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.04);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
  --shadow-glow: 0 0 60px var(--green-glow);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-pill: 100px;

  --font-heading: 'Cabinet Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'IBM Plex Mono', monospace;

  --positive: #0D9B6A;
  --negative: #DC2626;
  --yellow: #F59E0B;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text-secondary);
  background: var(--bg-white);
  letter-spacing: -0.01em;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading); color: var(--text-primary); }

/* --- Utilities --- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* Section labels */
.eyebrow {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--green);
  margin-bottom: 1rem;
}

/* Section headline */
.section-headline {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1.1;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

.section-sub {
  color: var(--text-secondary);
  font-size: 1.0625rem;
  line-height: 1.65;
  max-width: 640px;
  margin-top: 1.25rem;
}

/* Section spacing */
.section { padding: 6.5rem 0; }
.section--sm { padding: 4rem 0; }
.section--off-white { background: var(--bg-off-white); }
.section--green-tint { background: var(--bg-green-tint); }
.section--dark {
  background: var(--dark-gradient);
  color: #fff;
}
.section--dark .eyebrow { color: var(--teal); }
.section--dark .section-headline { color: #fff; }
.section--dark .section-sub { color: rgba(255,255,255,0.65); }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.85rem 2rem;
  transition: all 0.2s ease;
  white-space: nowrap;
  cursor: pointer;
}

.btn--primary {
  background: var(--green);
  color: #fff;
  box-shadow: 0 2px 8px rgba(13,155,106,0.25);
}
.btn--primary:hover {
  background: var(--green-hover);
  transform: scale(1.02);
  box-shadow: 0 4px 12px rgba(13,155,106,0.3);
}

.btn--outline {
  background: var(--bg-white);
  border: 1px solid var(--border);
  color: var(--text-primary);
}
.btn--outline:hover {
  border-color: rgba(0,0,0,0.12);
  background: var(--bg-off-white);
  transform: translateY(-1px);
}

.btn--white {
  background: #fff;
  color: var(--dark);
  font-weight: 700;
}
.btn--white:hover {
  background: var(--bg-green-tint);
  transform: scale(1.02);
}

.btn--ghost {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.25);
  color: #fff;
}
.btn--ghost:hover {
  border-color: rgba(255,255,255,0.5);
  background: rgba(255,255,255,0.06);
}

.btn--green-outline {
  background: #fff;
  border: 1px solid var(--green);
  color: var(--green);
}
.btn--green-outline:hover {
  background: var(--green);
  color: #fff;
}

.btn--full { width: 100%; justify-content: center; }

.green-link { color: var(--green); font-weight: 600; font-size: 0.95rem; transition: color 0.2s; }
.green-link:hover { color: var(--green-hover); }

/* --- Card System --- */
.card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* --- Badge --- */
.badge {
  font-size: 0.7rem;
  padding: 0.25rem 0.7rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
}
.badge--green { background: var(--green-light); color: var(--green); }
.badge--teal { background: #ECFDF5; color: var(--teal); }

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0);
  transition: all 0.3s ease;
}
.nav.scrolled {
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 8px rgba(0,0,0,0.04);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  height: 64px;
}

.nav__logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--green);
  letter-spacing: -0.03em;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav__link {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color 0.2s;
  position: relative;
  padding: 0.25rem 0;
}
.nav__link:hover { color: var(--text-primary); }
.nav__link.active { color: var(--green); font-weight: 600; }
.nav__link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--green);
  border-radius: 1px;
}

/* Nav dropdown */
.nav__dropdown {
  position: relative;
}
.nav__dropdown-menu {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 0.5rem;
  min-width: 220px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
  z-index: 100;
}
.nav__dropdown-menu::before {
  content: '';
  position: absolute;
  top: -8px;
  left: 0;
  right: 0;
  height: 8px;
}
.nav__dropdown:hover .nav__dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.nav__dropdown-item {
  display: block;
  padding: 0.55rem 1rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
}
.nav__dropdown-item:hover {
  background: var(--bg-green-tint);
  color: var(--green);
}

.nav__right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav__login {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color 0.2s;
}
.nav__login:hover { color: var(--text-primary); }

.nav__cta {
  background: var(--green);
  color: #fff;
  border-radius: var(--radius-pill);
  padding: 0.55rem 1.5rem;
  font-weight: 600;
  font-size: 0.85rem;
  transition: all 0.2s ease;
  box-shadow: 0 2px 8px rgba(13,155,106,0.2);
}
.nav__cta:hover {
  background: var(--green-hover);
  transform: scale(1.02);
  box-shadow: 0 4px 12px rgba(13,155,106,0.3);
}

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s;
}

/* Mobile menu */
.nav__mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 2rem 2rem;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  z-index: 999;
}
.nav__mobile-menu.open {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.nav__mobile-menu a {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 500;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-light);
}
.nav__mobile-menu a.active { color: var(--green); font-weight: 600; }
.nav__mobile-menu .btn {
  margin-top: 0.5rem;
  text-align: center;
  justify-content: center;
}

/* ============================================================
   FOOTER (dark)
   ============================================================ */
.footer {
  background: var(--dark-gradient);
  color: rgba(255,255,255,0.7);
  padding: 5rem 2rem 2rem;
}

.footer__inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 3rem;
  max-width: 1100px;
  margin: 0 auto;
}

.footer__logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  display: inline-block;
  margin-bottom: 1rem;
}

.footer__brand-desc {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.5);
  line-height: 1.65;
  margin-bottom: 1.5rem;
  max-width: 280px;
}

.footer__hipaa {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(13,155,106,0.15);
  color: var(--teal);
  border-radius: var(--radius-pill);
  padding: 0.35rem 0.9rem;
  font-size: 0.72rem;
  font-weight: 600;
}

.footer__social {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}
.footer__social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  color: rgba(255,255,255,0.5);
}
.footer__social a:hover {
  border-color: var(--teal);
  color: var(--teal);
  background: rgba(13,155,106,0.1);
}
.footer__social svg { width: 16px; height: 16px; }

.footer__col-title {
  font-size: 0.72rem;
  font-weight: 600;
  color: rgba(255,255,255,0.4);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1.2rem;
}

.footer__col-links {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}
.footer__col-links a {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.6);
  transition: color 0.2s;
}
.footer__col-links a:hover {
  color: #fff;
}

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 2rem;
  margin-top: 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
}
.footer__bottom p {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.35);
}

/* ============================================================
   SCROLL REVEAL ANIMATION SYSTEM
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
/* Stagger children in grids */
.reveal-group .reveal:nth-child(1) { transition-delay: 0ms; }
.reveal-group .reveal:nth-child(2) { transition-delay: 80ms; }
.reveal-group .reveal:nth-child(3) { transition-delay: 160ms; }
.reveal-group .reveal:nth-child(4) { transition-delay: 240ms; }
.reveal-group .reveal:nth-child(5) { transition-delay: 320ms; }
.reveal-group .reveal:nth-child(6) { transition-delay: 400ms; }

/* Hero float animation */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

/* FAQ accordion */
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item__question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  gap: 1rem;
  width: 100%;
  text-align: left;
  padding: 1.5rem 0;
}
.faq-item__question-text {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--text-primary);
  font-size: 1rem;
}
.faq-item__chevron {
  transition: transform 0.3s ease;
  flex-shrink: 0;
  color: var(--text-muted);
}
.faq-item.open .faq-item__chevron { transform: rotate(180deg); }
.faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.faq-item.open .faq-item__answer { max-height: 500px; }
.faq-item__answer-text {
  padding: 0 0 1.5rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  .nav__links, .nav__right .nav__login { display: none; }
  .nav__hamburger { display: flex; }
  .nav__dropdown-menu { display: none !important; }

  .footer__inner { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .footer__bottom { flex-direction: column; gap: 0.5rem; text-align: center; }

  .section { padding: 4.5rem 0; }
  .section-headline { font-size: clamp(1.75rem, 5vw, 2.2rem); }

  .container { padding: 0 1.5rem; }
}

@media (max-width: 480px) {
  .footer__inner { grid-template-columns: 1fr; }
  .container { padding: 0 1.25rem; }
}