/* ==========================================================================
   AH HealthCare — Design Tokens
   ========================================================================== */
:root {
  --color-primary: #0e7c86;
  --color-primary-dark: #0a5c64;
  --color-primary-light: #e4f5f4;
  --color-accent: #2dd4bf;
  --color-ink: #0f2027;
  --color-ink-soft: #48606a;
  --color-bg: #ffffff;
  --color-bg-alt: #f4f9f9;
  --color-bg-dark: #0b1f22;
  --color-border: #e1ecec;
  --color-white: #ffffff;
  --color-success: #1b8a5a;
  --color-error: #d64545;

  --font-heading: "Sora", "Manrope", system-ui, sans-serif;
  --font-body: "Manrope", system-ui, sans-serif;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 28px;
  --radius-pill: 999px;

  --shadow-sm: 0 2px 8px rgba(15, 32, 39, 0.06);
  --shadow-md: 0 12px 32px rgba(15, 32, 39, 0.10);
  --shadow-lg: 0 24px 60px rgba(15, 32, 39, 0.16);

  --container-w: 1180px;
  --transition: 220ms cubic-bezier(0.4, 0, 0.2, 1);
  --header-h: 78px;
}

/* ==========================================================================
   Reset
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, ul, ol, dl, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: none; }

body {
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 { font-family: var(--font-heading); line-height: 1.2; font-weight: 700; }

.container {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-primary);
  color: #fff;
  padding: 12px 20px;
  z-index: 999;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ==========================================================================
   Preloader
   ========================================================================== */
#preloader {
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 500ms ease, visibility 500ms ease;
}
#preloader.is-hidden { opacity: 0; visibility: hidden; }
.loader-ring {
  width: 44px; height: 44px;
  border: 4px solid var(--color-primary-light);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 800ms linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
  white-space: nowrap;
}
.btn-sm { padding: 10px 20px; font-size: 0.85rem; }
.btn-lg { padding: 17px 34px; font-size: 1rem; }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--color-primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }

.btn-outline {
  border: 1.5px solid rgba(255,255,255,0.6);
  color: #fff;
}
.btn-outline:hover { background: rgba(255,255,255,0.12); transform: translateY(-2px); }

.btn-dark {
  background: var(--color-ink);
  color: #fff;
}
.btn-dark:hover { background: var(--color-primary-dark); transform: translateY(-2px); }

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 500;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition), height var(--transition);
}
.site-header.is-scrolled {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  height: 68px;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 42px; height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.05rem;
  flex-shrink: 0;
}
.brand-text {
  display: flex;
  flex-direction: column;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-ink);
  transition: color var(--transition);
}
.site-header:not(.is-scrolled) .brand-text { color: #fff; }
.brand-text small {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.68rem;
  letter-spacing: 0.03em;
  opacity: 0.75;
  text-transform: uppercase;
}

.main-nav ul { display: flex; gap: 32px; }
.main-nav a {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-ink);
  position: relative;
  padding: 6px 0;
  transition: color var(--transition);
}
.site-header:not(.is-scrolled) .main-nav a { color: #fff; }
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: 0;
  height: 2px;
  background: var(--color-accent);
  transition: right var(--transition);
}
.main-nav a:hover::after, .main-nav a.active::after { right: 0; }
.main-nav a:hover, .main-nav a.active { color: var(--color-accent); }

.header-actions { display: flex; align-items: center; gap: 16px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px; height: 40px;
}
.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--color-ink);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition), background var(--transition);
}
.site-header:not(.is-scrolled) .nav-toggle span { background: #fff; }
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  color: #fff;
  overflow: hidden;
}
.hero-media { position: absolute; inset: 0; z-index: 0; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(10,25,29,0.78) 0%, rgba(10,25,29,0.72) 45%, rgba(10,25,29,0.9) 100%);
}
.hero-content { position: relative; z-index: 1; padding-top: var(--header-h); max-width: 760px; }

.eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 14px;
}

.hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.6rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}

.hero-lead {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.85);
  max-width: 620px;
  margin-bottom: 32px;
}

.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 56px; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
  border-top: 1px solid rgba(255,255,255,0.18);
  padding-top: 28px;
  max-width: 720px;
}
.hero-stats dt {
  font-family: var(--font-heading);
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  font-weight: 800;
  color: #fff;
}
.hero-stats dd {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.72);
  margin-top: 4px;
}

.scroll-cue {
  position: absolute;
  bottom: 28px; left: 50%;
  transform: translateX(-50%);
  width: 26px; height: 42px;
  border: 2px solid rgba(255,255,255,0.55);
  border-radius: var(--radius-pill);
  z-index: 1;
}
.scroll-cue span {
  position: absolute;
  top: 8px; left: 50%;
  width: 4px; height: 8px;
  background: #fff;
  border-radius: 2px;
  transform: translateX(-50%);
  animation: scrollCue 1.6s ease infinite;
}
@keyframes scrollCue {
  0% { opacity: 1; top: 8px; }
  70% { opacity: 0; top: 20px; }
  100% { opacity: 0; top: 20px; }
}

/* ==========================================================================
   Trust strip
   ========================================================================== */
.trust-strip {
  background: var(--color-bg-dark);
  padding: 18px 0;
  overflow: hidden;
}
.trust-track {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
  justify-content: center;
  color: rgba(255,255,255,0.65);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

/* ==========================================================================
   Section shared
   ========================================================================== */
section { padding: 108px 0; }
.section-head { max-width: 640px; margin: 0 auto 56px; text-align: center; }
.section-head.light .eyebrow { color: var(--color-accent); }
.section-head h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); margin-bottom: 14px; }
.section-lead { color: var(--color-ink-soft); font-size: 1.02rem; }

/* ==========================================================================
   About
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 72px;
  align-items: center;
}
.about-media { position: relative; }
.about-media img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  aspect-ratio: 4/5;
  object-fit: cover;
}
.about-badge {
  position: absolute;
  bottom: -24px; right: -24px;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-md);
  padding: 20px 24px;
  box-shadow: var(--shadow-md);
  text-align: center;
}
.about-badge strong { display: block; font-family: var(--font-heading); font-size: 1.8rem; }
.about-badge span { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.04em; opacity: 0.85; }

.about-copy h2 { margin-bottom: 18px; }
.about-copy > p { color: var(--color-ink-soft); margin-bottom: 24px; }

.check-list { display: grid; gap: 12px; margin-bottom: 32px; }
.check-list li {
  position: relative;
  padding-left: 30px;
  color: var(--color-ink);
  font-weight: 500;
  font-size: 0.95rem;
}
.check-list li::before {
  content: "\2713";
  position: absolute;
  left: 0; top: 0;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-size: 0.7rem;
  font-weight: 800;
  display: grid;
  place-items: center;
}

/* ==========================================================================
   Products
   ========================================================================== */
.products { background: var(--color-bg-alt); }
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}
.product-card {
  background: #fff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
  padding-bottom: 26px;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.product-img { aspect-ratio: 16/11; overflow: hidden; }
.product-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 500ms ease; }
.product-card:hover .product-img img { transform: scale(1.06); }
.product-card h3 { font-size: 1.12rem; margin: 20px 24px 8px; }
.product-card p { color: var(--color-ink-soft); font-size: 0.9rem; margin: 0 24px 14px; }
.card-link { margin: 0 24px; color: var(--color-primary); font-weight: 700; font-size: 0.88rem; }
.card-link:hover { color: var(--color-primary-dark); }

/* ==========================================================================
   Why us
   ========================================================================== */
.why { background: var(--color-bg-dark); color: #fff; }
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.why-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: transform var(--transition), background var(--transition);
}
.why-card:hover { transform: translateY(-6px); background: rgba(255,255,255,0.07); }
.why-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: grid; place-items: center;
  font-size: 1.3rem;
  margin-bottom: 18px;
}
.why-card h3 { font-size: 1.08rem; margin-bottom: 10px; }
.why-card p { color: rgba(255,255,255,0.68); font-size: 0.9rem; }

/* ==========================================================================
   Quality / timeline
   ========================================================================== */
.quality-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 72px;
  align-items: center;
}
.quality-copy h2 { margin-bottom: 12px; }
.quality-copy .section-lead { margin-bottom: 40px; }

.timeline { display: grid; gap: 28px; }
.timeline li { display: flex; gap: 20px; }
.timeline-num {
  flex-shrink: 0;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 0.85rem;
  display: grid;
  place-items: center;
}
.timeline h3 { font-size: 1.02rem; margin-bottom: 4px; }
.timeline p { color: var(--color-ink-soft); font-size: 0.9rem; }

.quality-media img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  aspect-ratio: 3/4;
  object-fit: cover;
}

/* ==========================================================================
   Testimonials
   ========================================================================== */
.testimonial-slider { max-width: 760px; margin: 0 auto; text-align: center; }
.testimonial-track { position: relative; min-height: 160px; }
.testimonial-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 400ms ease, transform 400ms ease;
  pointer-events: none;
}
.testimonial-slide.is-active { opacity: 1; transform: translateY(0); pointer-events: auto; position: relative; }
.testimonial-slide p {
  font-family: var(--font-heading);
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 20px;
}
.testimonial-slide footer { color: var(--color-ink-soft); font-size: 0.9rem; font-weight: 600; }

.testimonial-controls { display: flex; align-items: center; justify-content: center; gap: 22px; margin-top: 32px; }
.testimonial-controls button {
  width: 42px; height: 42px;
  border-radius: 50%;
  border: 1.5px solid var(--color-border);
  display: grid; place-items: center;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.testimonial-controls button:hover { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.testimonial-dots { display: flex; gap: 8px; }
.testimonial-dots button {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-border);
  padding: 0;
}
.testimonial-dots button.is-active { background: var(--color-primary); width: 22px; border-radius: var(--radius-pill); }

/* ==========================================================================
   CTA banner
   ========================================================================== */
.cta-banner {
  background: linear-gradient(120deg, var(--color-primary-dark), var(--color-primary));
  color: #fff;
  padding: 80px 0;
}
.cta-inner { text-align: center; }
.cta-inner h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: 12px; }
.cta-inner p { color: rgba(255,255,255,0.85); margin-bottom: 32px; }

/* ==========================================================================
   Contact
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 72px;
}
.contact-info h2 { margin: 10px 0 14px; font-size: clamp(1.6rem, 3vw, 2.1rem); }
.contact-details { margin-top: 36px; display: grid; gap: 20px; }
.contact-details li { display: flex; flex-direction: column; gap: 2px; }
.contact-details strong { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--color-primary); }
.contact-details span { font-weight: 600; }

.contact-form {
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-field { margin-bottom: 20px; position: relative; }
.form-field label { display: block; font-size: 0.85rem; font-weight: 700; margin-bottom: 8px; }
.form-field input, .form-field select, .form-field textarea {
  width: 100%;
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-border);
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-light);
}
.form-error {
  display: none;
  color: var(--color-error);
  font-size: 0.78rem;
  margin-top: 6px;
}
.form-field.has-error input,
.form-field.has-error textarea { border-color: var(--color-error); }
.form-field.has-error .form-error { display: block; }

.form-success {
  display: none;
  margin-top: 18px;
  padding: 14px 18px;
  background: rgba(27, 138, 90, 0.1);
  color: var(--color-success);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
}
.form-success.is-visible { display: block; }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer { background: var(--color-bg-dark); color: rgba(255,255,255,0.7); padding: 72px 0 0; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.8fr 0.8fr 0.8fr;
  gap: 40px;
  padding-bottom: 56px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand p { margin-top: 16px; font-size: 0.88rem; max-width: 280px; }
.footer-links h4 { color: #fff; font-size: 0.9rem; margin-bottom: 18px; }
.footer-links ul { display: grid; gap: 11px; font-size: 0.88rem; }
.footer-links a:hover { color: var(--color-accent); }
.footer-bottom { padding: 22px 0; text-align: center; font-size: 0.8rem; }

/* ==========================================================================
   Back to top
   ========================================================================== */
.back-to-top {
  position: fixed;
  right: 24px; bottom: 24px;
  width: 46px; height: 46px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: grid; place-items: center;
  box-shadow: var(--shadow-md);
  opacity: 0; visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition), background var(--transition);
  z-index: 400;
}
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--color-primary-dark); }

/* ==========================================================================
   Reveal animation
   ========================================================================== */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 700ms ease, transform 700ms ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 980px) {
  .about-grid, .quality-grid, .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .quality-media { order: -1; }
  .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .why-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  section { padding: 76px 0; }
  .main-nav {
    position: fixed;
    top: var(--header-h); left: 0; right: 0; bottom: 0;
    background: #fff;
    padding: 32px 24px;
    transform: translateX(100%);
    transition: transform var(--transition);
    z-index: 400;
  }
  .main-nav.is-open { transform: translateX(0); }
  .main-nav ul { flex-direction: column; gap: 8px; }
  .main-nav a { color: var(--color-ink) !important; display: block; padding: 14px 4px; font-size: 1.05rem; border-bottom: 1px solid var(--color-border); }
  .nav-toggle { display: flex; }
  .header-actions .btn-sm { display: none; }
  .hero-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .product-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .about-badge { position: static; margin-top: -40px; margin-left: 20px; width: fit-content; }
}