/* Houston Anesthesia Services -- theme: graphite & copper (energy-corridor industrial) */

:root {
  --color-graphite: #3a3f44;
  --color-graphite-dark: #262a2e;
  --color-graphite-darker: #16181a;
  --color-copper: #b6713f;
  --color-copper-light: #d49362;
  --color-paper: #f6f4f1;
  --color-cream: #ede8e1;
  --color-ink: #1c1f22;
  --color-muted: #6b7176;
  --color-border: #dcd6cc;
  --font-display: "Space Grotesk", "IBM Plex Sans", sans-serif;
  --font-body: "IBM Plex Sans", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-paper);
  line-height: 1.6;
}
h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  margin: 0 0 0.5em;
  line-height: 1.2;
  color: var(--color-graphite-darker);
}
p { margin: 0 0 1em; color: var(--color-muted); }
a { color: var(--color-copper); text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: 100%; max-width: 1140px; margin: 0 auto; padding: 0 24px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 0.7em 1.6em;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
}
.btn-primary { background: var(--color-copper); color: #fff; }
.btn-primary:hover { background: var(--color-copper-light); }
.btn-outline { border-color: rgba(255,255,255,0.5); color: #fff; }
.btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.1); }
.btn-sm { padding: 0.5em 1.2em; font-size: 0.85rem; }
.btn-secondary { background: transparent; border-color: var(--color-graphite); color: var(--color-graphite); }
.btn-secondary:hover { background: var(--color-graphite); color: #fff; }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: transparent;
  padding: 18px 0;
  transition: background 0.3s ease, padding 0.3s ease, box-shadow 0.3s ease;
}
.site-header.scrolled {
  background: var(--color-graphite-darker);
  padding: 10px 0;
  box-shadow: 0 2px 16px rgba(0,0,0,0.25);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.site-header__logo img { height: 38px; }
.site-nav {
  display: flex;
  gap: 28px;
  flex: 1;
  justify-content: center;
}
.site-nav a {
  color: #fff;
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  position: relative;
  padding: 4px 0;
}
.site-nav a.active, .site-nav a:hover { color: var(--color-copper-light); }
.site-header__actions { display: flex; gap: 10px; align-items: center; }

/* ---------- Mobile nav toggle ---------- */
.nav-toggle {
  display: none;
  position: relative;
  z-index: 101;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 32px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 100vh;
  background: var(--color-graphite-darker);
  z-index: 99;
  padding-top: 90px;
  overflow-y: auto;
}
.mobile-nav.is-open { display: block; }
.mobile-nav nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0 24px 40px;
}
.mobile-nav nav a {
  color: #fff;
  font-size: 1.1rem;
  font-weight: 500;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.mobile-nav nav a.active, .mobile-nav nav a:hover { color: var(--color-copper-light); }
.mobile-nav__contact { display: block; margin: 8px 24px 0; text-align: center; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  background-size: cover;
  background-position: center;
  background-color: var(--color-graphite-darker);
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(22,24,26,0.92) 0%, rgba(22,24,26,0.78) 45%, rgba(22,24,26,0.4) 100%);
}
.hero__inner {
  position: relative;
  z-index: 2;
  max-width: 620px;
  padding: 140px 0 110px;
}
.hero__kicker {
  display: inline-block;
  color: var(--color-copper-light);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.8rem;
  margin-bottom: 16px;
}
.hero h1 { color: #fff; font-size: 2.6rem; margin-bottom: 18px; }
.hero p.lead { color: #d8d4cd; font-size: 1.1rem; max-width: 520px; }
.hero__actions { display: flex; gap: 14px; margin-top: 28px; }

/* floating stat bar overlapping hero/about seam */
.stat-bar-wrap { position: relative; z-index: 3; }
.stat-bar {
  position: relative;
  margin-top: -56px;
  background: var(--color-graphite);
  border-radius: 8px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  box-shadow: 0 18px 40px rgba(0,0,0,0.25);
}
.stat-bar__item {
  padding: 26px 20px;
  text-align: center;
  color: #fff;
  border-right: 1px solid rgba(255,255,255,0.12);
}
.stat-bar__item:last-child { border-right: none; }
.stat-bar__item span {
  display: block;
  font-family: var(--font-display);
  color: var(--color-copper-light);
  font-weight: 600;
  font-size: 0.95rem;
}

/* ---------- Section basics ---------- */
.section { padding: 120px 0 90px; }
.section--light { background: var(--color-cream); }
.section--dark { background: var(--color-graphite-darker); color: #fff; }
.section--dark h2, .section--dark h3, .section--dark h4 { color: #fff; }
.section--dark p { color: #c7c2ba; }
.section-head { max-width: 640px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section h2 { font-size: 2rem; }

/* ---------- About: icon-card grid ---------- */
.pillar-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
}
.pillar-card {
  background: var(--color-paper);
  padding: 38px 34px;
}
.pillar-icon {
  width: 64px; height: 64px;
  border-radius: 50%;
  background: var(--color-cream);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.pillar-icon img { width: 32px; height: 32px; }
.pillar-card h4 { font-size: 1.15rem; margin-bottom: 10px; }
.pillar-card p { font-size: 0.95rem; margin-bottom: 0; }

/* ---------- Services: numbered accordion with connecting line ---------- */
.service-accordion { max-width: 760px; margin: 0 auto; }
.service-row { position: relative; }
.service-row::before {
  content: "";
  position: absolute;
  left: 27px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
  z-index: 0;
}
.service-row:first-child::before { top: 48px; }
.service-row:last-child::before { bottom: auto; height: 48px; }
.service-row__trigger {
  position: relative;
  z-index: 1;
  width: 100%;
  display: grid;
  grid-template-columns: 56px 1fr 24px;
  align-items: center;
  gap: 20px;
  padding: 20px 0;
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
  font-family: inherit;
}
.service-row__num {
  position: relative;
  z-index: 2;
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--color-copper);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.35s ease;
}
.service-row__trigger[aria-expanded="true"] .service-row__num {
  transform: scale(1.08);
  box-shadow: 0 0 0 5px rgba(182, 113, 63, 0.18);
}
.service-row__trigger h4 {
  font-size: 1.2rem;
  margin: 0;
  color: var(--color-graphite-darker);
  transition: color 0.25s ease;
}
.service-row__trigger[aria-expanded="true"] h4 { color: var(--color-copper); }
.service-row__chevron {
  width: 12px; height: 12px;
  border-right: 2px solid var(--color-graphite);
  border-bottom: 2px solid var(--color-graphite);
  transform: rotate(45deg);
  transition: transform 0.35s cubic-bezier(0.65, 0, 0.35, 1), border-color 0.25s ease;
}
.service-row__trigger[aria-expanded="true"] .service-row__chevron {
  transform: rotate(-135deg);
  border-color: var(--color-copper);
}
.service-row__panel {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.4s cubic-bezier(0.65, 0, 0.35, 1);
}
.service-row__panel.is-open { grid-template-rows: 1fr; }
.service-row__panel-inner {
  min-height: 0;
  overflow: hidden;
  padding: 0 0 24px 76px;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.service-row__panel.is-open .service-row__panel-inner {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.3s ease 0.1s, transform 0.3s ease 0.1s;
}
.service-row__panel p { font-size: 0.95rem; margin: 0; }

@media (max-width: 720px) {
  .service-row::before { left: 21px; }
  .service-row:first-child::before { top: 42px; }
  .service-row:last-child::before { height: 42px; }
  .service-row__trigger { grid-template-columns: 44px 1fr 20px; gap: 14px; }
  .service-row__num { width: 44px; height: 44px; font-size: 1rem; }
  .service-row__panel-inner { padding-left: 58px; }
}

/* ---------- Contact ---------- */
.contact-wrap {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 50px;
  align-items: start;
}
.pin-card {
  background: var(--color-graphite-darker);
  color: #fff;
  border-radius: 8px;
  padding: 32px;
  margin-bottom: 18px;
  border-left: 3px solid var(--color-copper);
}
.pin-card h4 { color: var(--color-copper-light); font-size: 1rem; margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.04em; }
.pin-card a, .pin-card span { color: #f0ece6; display: block; }
.topic-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 24px; }
.topic-tags span {
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 30px;
  padding: 8px 18px;
  font-size: 0.85rem;
  color: #e7e3dc;
}

/* ---------- Inquiry / contact form ---------- */
.inquiry-form__label {
  display: block;
  color: #e7e3dc;
  font-weight: 600;
  margin-bottom: 10px;
}
.inquiry-form__select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 4px;
  border: 1px solid rgba(255,255,255,0.25);
  background: var(--color-graphite);
  color: #fff;
  font-size: 0.95rem;
  margin-bottom: 8px;
}
.inquiry-panel {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.12);
}
.inquiry-panel__title {
  font-size: 1.05rem;
  color: #fff;
  margin-bottom: 16px;
}
.form-row { margin-bottom: 16px; }
.form-row label {
  display: block;
  color: #e7e3dc;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 6px;
}
.form-row .req { color: var(--color-copper-light); margin-left: 2px; }
.form-row input[type="text"],
.form-row input[type="tel"],
.form-row input[type="email"],
.form-row input[type="file"],
.form-row textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 4px;
  border: 1px solid rgba(255,255,255,0.25);
  background: rgba(255,255,255,0.05);
  color: #fff;
  font-family: var(--font-body);
  font-size: 0.92rem;
}
.form-row textarea { resize: vertical; }
.form-row--consent label {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-weight: 400;
  color: #e7e3dc;
  font-size: 0.88rem;
}
.form-row--consent input[type="checkbox"] {
  margin-top: 3px;
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}
.form-row--consent a { color: var(--color-copper-light); }
.inquiry-form__submit { margin-top: 8px; }
.inquiry-form [hidden] { display: none !important; }
.inquiry-form__confirmation {
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 4px;
  background: rgba(182,113,63,0.18);
  border: 1px solid var(--color-copper);
  color: #fff;
  font-size: 0.92rem;
}

/* ---------- Footer (stacked/centered) ---------- */
.site-footer {
  background: var(--color-graphite-darker);
  color: #c7c2ba;
  padding: 60px 0 0;
  text-align: center;
}
.site-footer__logo img { height: 34px; margin: 0 auto 14px; }
.site-footer p.tagline { max-width: 420px; margin: 0 auto 26px; font-size: 0.92rem; }
.site-footer__nav { display: flex; justify-content: center; gap: 26px; margin-bottom: 26px; flex-wrap: wrap; }
.site-footer__nav a { color: #e7e3dc; font-size: 0.9rem; }
.site-footer__nav a:hover { color: var(--color-copper-light); }
.site-footer__social { display: flex; justify-content: center; gap: 14px; margin-bottom: 36px; }
.site-footer__social a {
  width: 38px; height: 38px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-size: 0.85rem;
}
.site-footer__social a:hover { border-color: var(--color-copper-light); color: var(--color-copper-light); }
.site-footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 22px 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.82rem;
  color: #8c8780;
}
.site-footer__bottom a { color: #8c8780; }
.site-footer__bottom a:hover { color: var(--color-copper-light); }

/* ---------- Page hero (privacy / blog) ---------- */
.page-hero {
  background: var(--color-graphite-darker);
  padding: 160px 0 60px;
  text-align: center;
}
.page-hero h1 { color: #fff; }

/* ---------- Blog ---------- */
.blog-disclaimer {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--color-cream);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-copper);
  border-radius: 6px;
  padding: 18px 22px;
  margin-bottom: 40px;
}
.blog-disclaimer__icon { color: var(--color-copper); flex-shrink: 0; margin-top: 2px; }
.blog-disclaimer__text { font-size: 0.94rem; line-height: 1.6; color: var(--color-muted); margin: 0; }
.blog-disclaimer__text a { color: var(--color-copper); font-weight: 600; text-decoration: underline; }
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.blog-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.blog-card:hover { box-shadow: 0 14px 32px rgba(0,0,0,0.12); transform: translateY(-2px); }
.blog-card__img { width: 100%; height: 190px; object-fit: cover; }
.blog-card__body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.blog-card__date { color: var(--color-copper); font-size: 0.78rem; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; margin-bottom: 8px; }
.blog-card__title { font-size: 1.1rem; margin-bottom: 10px; color: var(--color-graphite-darker); }
.blog-card__excerpt { font-size: 0.9rem; flex: 1; }
.blog-card__link { font-weight: 600; font-size: 0.88rem; color: var(--color-copper); }
.pagination { display: flex; justify-content: center; gap: 10px; margin-top: 50px; flex-wrap: wrap; }
.pagination a, .pagination span {
  padding: 8px 14px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 0.9rem;
  color: var(--color-graphite);
}
.pagination span.current { background: var(--color-copper); color: #fff; border-color: var(--color-copper); }
.pagination a:hover { border-color: var(--color-copper); color: var(--color-copper); }

.post-content { max-width: 760px; margin: 0 auto; }
.post-back { display: inline-block; margin-bottom: 24px; font-weight: 600; font-size: 0.9rem; }
.post-meta { color: var(--color-copper); font-weight: 600; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 10px; }
.post-hero-img { width: 100%; border-radius: 8px; margin: 20px 0 30px; max-height: 420px; object-fit: cover; }
.post-content h2, .post-content h3 { margin-top: 1.4em; }
.post-content p { color: var(--color-ink); }
.legal-content p, .legal-content li { color: var(--color-ink); }
.legal-content h2 { margin-top: 1.6em; font-size: 1.4rem; }

/* ---------- Post prev/next nav ---------- */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 50px;
  padding-top: 30px;
  border-top: 1px solid var(--color-border);
}
.post-nav__link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-ink);
  transition: border-color 0.2s ease, background 0.2s ease;
}
.post-nav__link--older { text-align: right; }
.post-nav__link:hover { border-color: var(--color-copper); background: var(--color-cream); }
.post-nav__link--older:only-child { grid-column: 2; }
.post-nav__label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-copper);
}
.post-nav__title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-graphite-darker);
}

/* ---------- Scroll-reveal animation ---------- */
[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}
[data-animate-group] > [data-animate] {
  transition-delay: calc(var(--reveal-index, 0) * 80ms);
}
@media (prefers-reduced-motion: reduce) {
  [data-animate] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .service-row__num,
  .service-row__trigger h4,
  .service-row__chevron,
  .service-row__panel,
  .service-row__panel-inner {
    transition: none;
  }
  .service-row__panel-inner { transform: none; }
}

@media (max-width: 900px) {
  .site-nav { display: none; }
  .site-header__actions { display: none; }
  .nav-toggle { display: flex; }
  .pillar-grid { grid-template-columns: 1fr; }
  .contact-wrap { grid-template-columns: 1fr; }
  .blog-grid { grid-template-columns: repeat(2, 1fr); }
  .hero h1 { font-size: 2rem; }
  .stat-bar { grid-template-columns: 1fr; }
  .stat-bar__item { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.12); }
  .stat-bar__item:last-child { border-bottom: none; }
  .post-nav { grid-template-columns: 1fr; }
  .post-nav__link--older { text-align: left; }
}
@media (max-width: 600px) {
  .blog-grid { grid-template-columns: 1fr; }
  .site-footer__bottom { flex-direction: column; text-align: center; }
}