/* ST Sites — design system & layout */

:root {
  --bg: #f8fafc;
  --bg-elev: #ffffff;
  --bg-muted: #f1f5f9;
  --text: #0f172a;
  --text-muted: #475569;
  --text-subtle: #64748b;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --accent: #0d9488;
  --accent-hover: #0f766e;
  --accent-soft: #ccfbf1;
  --accent-contrast: #ffffff;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow: 0 4px 12px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.08);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --container: 1120px;
  --header-h: 68px;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
svg {
  max-width: 100%;
  display: block;
}

a {
  color: var(--accent-hover);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover,
a:focus-visible {
  color: var(--accent-hover);
}

h1, h2, h3, h4 {
  margin: 0 0 var(--space-4);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text);
}

h1 {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.25rem);
}

h3 {
  font-size: 1.25rem;
}

p {
  margin: 0 0 var(--space-4);
  color: var(--text-muted);
}

ul {
  margin: 0 0 var(--space-4);
  padding-left: 1.25rem;
  color: var(--text-muted);
}

ul li {
  margin-bottom: var(--space-2);
}

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  z-index: 100;
  padding: var(--space-3) var(--space-4);
  background: var(--accent);
  color: var(--accent-contrast);
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top 0.15s ease;
}

.skip-link:focus {
  top: var(--space-4);
  color: var(--accent-contrast);
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: 0 var(--space-5);
  font: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease, transform 0.05s ease;
  white-space: nowrap;
}

.btn:active {
  transform: translateY(1px);
}

.btn--primary {
  background: var(--accent-hover);
  color: var(--accent-contrast);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--accent-hover);
  color: var(--accent-contrast);
}

.btn--secondary {
  background: var(--bg-elev);
  color: var(--text);
  border-color: var(--border-strong);
}

.btn--secondary:hover,
.btn--secondary:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

.btn--ghost {
  background: transparent;
  color: var(--text);
  padding-inline: var(--space-3);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  color: var(--accent);
}

/* ---------- Header / Nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(248, 250, 252, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  letter-spacing: -0.01em;
}

.brand:hover,
.brand:focus-visible {
  color: var(--text);
}

.brand__mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--accent-hover);
  color: var(--accent-contrast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text);
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

.nav-toggle__bar,
.nav-toggle__bar::before,
.nav-toggle__bar::after {
  content: '';
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  position: relative;
  transition: transform 0.2s ease, opacity 0.2s ease, top 0.2s ease, bottom 0.2s ease;
}

.nav-toggle__bar::before {
  position: absolute;
  top: -6px;
  left: 0;
}

.nav-toggle__bar::after {
  position: absolute;
  bottom: -6px;
  left: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar::after {
  bottom: 0;
  transform: rotate(-45deg);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 var(--space-3);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
}

.site-nav__list a:hover,
.site-nav__list a:focus-visible {
  color: var(--text);
}

.site-nav__list a[aria-current="page"] {
  color: var(--accent);
  font-weight: 600;
}

.site-nav__cta {
  margin-left: var(--space-2);
}

/* ---------- Sections ---------- */

section {
  padding-block: var(--space-9);
}

section + section {
  padding-top: 0;
}

.section__eyebrow {
  display: inline-block;
  margin-bottom: var(--space-3);
  padding: 4px 10px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #115e59;
  background: var(--accent-soft);
  border-radius: 999px;
}

.section__head {
  max-width: 720px;
  margin-bottom: var(--space-7);
}

.section__head--center {
  margin-inline: auto;
  text-align: center;
}

.section__head p {
  font-size: 1.05rem;
  color: var(--text-muted);
}

.lede {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 60ch;
}

/* ---------- Hero ---------- */

.hero {
  padding-block: var(--space-9);
  text-align: center;
  background:
    radial-gradient(circle at 20% 0%, rgba(13, 148, 136, 0.08), transparent 40%),
    radial-gradient(circle at 80% 10%, rgba(13, 148, 136, 0.06), transparent 40%);
}

.hero__inner {
  max-width: 760px;
  margin-inline: auto;
}

.hero h1 {
  margin-bottom: var(--space-5);
}

.hero__accent {
  color: var(--accent);
}

.hero__ctas {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--space-6);
}

.hero__meta {
  margin-top: var(--space-6);
  font-size: 0.9rem;
  color: var(--text-subtle);
}

/* ---------- Cards / Grids ---------- */

.grid {
  display: grid;
  gap: var(--space-5);
}

.grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: var(--border-strong);
}

.feature {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.feature__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent-hover);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.feature h3 {
  margin: 0;
  font-size: 1.1rem;
}

.feature p {
  margin: 0;
  font-size: 0.95rem;
}

/* ---------- Demo cards ---------- */

.demo-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.demo-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.demo-card__shot {
  aspect-ratio: 16 / 9;
  background: var(--bg-muted);
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}

.demo-card__shot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
}

.demo-card__shot--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-hover);
  background: linear-gradient(135deg, var(--bg-muted), var(--bg));
}

.demo-card__body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}

.demo-card__title {
  margin: 0;
  font-size: 1.15rem;
}

.demo-card__tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #115e59;
  background: var(--accent-soft);
  padding: 3px 8px;
  border-radius: 999px;
  align-self: flex-start;
}

.demo-card__desc {
  margin: 0;
  font-size: 0.95rem;
}

.demo-card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 600;
  font-size: 0.95rem;
  margin-top: auto;
}

.demo-card__link svg {
  transition: transform 0.2s ease;
}

.demo-card__link:hover svg,
.demo-card__link:focus-visible svg {
  transform: translateX(2px);
}

/* ---------- Pricing ---------- */

.pricing-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
  box-shadow: var(--shadow);
  max-width: 640px;
  margin-inline: auto;
  text-align: center;
}

.pricing-card__price {
  font-size: 3rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.03em;
  line-height: 1;
  margin: var(--space-3) 0 var(--space-1);
}

.pricing-card__price small {
  font-size: 1.1rem;
  color: var(--text-muted);
  font-weight: 500;
}

.pricing-card__sub {
  color: var(--text-muted);
  margin-bottom: var(--space-6);
}

.pricing-card__list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-6);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3) var(--space-5);
  text-align: left;
}

.pricing-card__list li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin: 0;
  color: var(--text);
  font-size: 0.95rem;
.pricing-card__list svg {
  color: var(--accent-hover);
  flex-shrink: 0;
}
}

/* ---------- Contact form ---------- */

.contact {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-7);
  align-items: start;
}

.contact__info h2 {
  margin-bottom: var(--space-4);
}

.contact__details {
  list-style: none;
  padding: 0;
  margin: var(--space-5) 0 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.contact__details li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--text);
  font-size: 0.95rem;
.contact__details svg {
  color: var(--accent-hover);
  flex-shrink: 0;
}
}

.form {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
}

.form__field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.form__field label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

.form__field input,
.form__field textarea {
  font: inherit;
  padding: 12px 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
  min-height: 44px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form__field textarea {
  min-height: 140px;
  resize: vertical;
  line-height: 1.5;
}

.form__field input:focus,
.form__field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}

.form__field input[aria-invalid="true"],
.form__field textarea[aria-invalid="true"] {
  border-color: #dc2626;
}

.form__field .visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.form__honeypot {
  position: absolute;
  left: -9999px;
  top: -9999px;
  opacity: 0;
  pointer-events: none;
}

.form__submit {
  width: 100%;
}

.form__status {
  margin-top: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  display: none;
}

.form__status[data-state="success"] {
  display: block;
  background: #ecfdf5;
  color: #065f46;
  border: 1px solid #a7f3d0;
}

.form__status[data-state="error"] {
  display: block;
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

/* ---------- CTA strip ---------- */

.cta-strip {
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  color: var(--accent-contrast);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: var(--space-5);
  box-shadow: var(--shadow-lg);
  margin-block: var(--space-7);
}

.cta-strip h2 {
  margin: 0 0 var(--space-2);
  color: var(--accent-contrast);
}

.cta-strip p {
  margin: 0;
  color: rgba(255, 255, 255, 0.9);
}

.cta-strip .btn--secondary {
  background: var(--bg-elev);
  color: var(--accent-hover);
  border: 1px solid rgba(255, 255, 255, 0.4);
}

.cta-strip .btn--secondary:hover,
.cta-strip .btn--secondary:focus-visible {
  background: var(--bg);
  color: var(--accent-hover);
}

/* ---------- Page header (non-home) ---------- */

.page-header {
  padding-block: var(--space-8);
  text-align: center;
  background:
    radial-gradient(circle at 50% 0%, rgba(13, 148, 136, 0.08), transparent 50%);
}

.page-header h1 {
  margin-bottom: var(--space-3);
}

.page-header p {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 60ch;
  margin-inline: auto;
}

/* ---------- About ---------- */

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: var(--space-7);
  align-items: start;
}

.about-photo {
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--accent-soft), var(--bg-muted));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  border: 1px solid var(--border);
}

.about-photo svg {
  width: 64px;
  height: 64px;
}

.about-body h2 {
  margin-top: var(--space-6);
}

.about-body h2:first-child {
  margin-top: 0;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-elev);
  padding-block: var(--space-7);
  margin-top: var(--space-9);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--space-6);
}

.site-footer__brand p {
  font-size: 0.9rem;
  max-width: 32ch;
}

.site-footer__heading {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text);
  font-weight: 600;
  margin: 0 0 var(--space-3);
}

.site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.site-footer a {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--accent);
}

.site-footer__contact {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  font-size: 0.95rem;
  color: var(--text-muted);
}

.site-footer__contact a {
  color: var(--text-muted);
}

.site-footer__bottom {
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: 0.85rem;
  color: var(--text-subtle);
}

/* ---------- Visually hidden (utility) ---------- */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- Reveal animation ---------- */

.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .contact {
    grid-template-columns: 1fr;
  }

  .about-grid {
    grid-template-columns: 1fr;
  }

  .about-photo {
    max-width: 320px;
    margin-inline: auto;
  }

  .site-footer__inner {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --header-h: 60px;
  }

  section {
    padding-block: var(--space-7);
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-elev);
    border-bottom: 1px solid var(--border);
    padding: var(--space-4) var(--space-5);
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-2);
    box-shadow: var(--shadow);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.15s ease, opacity 0.15s ease;
  }

  .site-nav.is-open {
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav__list li {
    border-bottom: 1px solid var(--border);
  }

  .site-nav__list li:last-child {
    border-bottom: none;
  }

  .site-nav__list a {
    width: 100%;
    padding: var(--space-3) 0;
  }

  .site-nav__cta {
    margin-left: 0;
    margin-top: var(--space-2);
  }

  .grid--3 {
    grid-template-columns: 1fr;
  }

  .grid--2 {
    grid-template-columns: 1fr;
  }

  .pricing-card__list {
    grid-template-columns: 1fr;
  }

  .cta-strip {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero {
    padding-block: var(--space-7);
  }

  .hero__ctas .btn {
    width: 100%;
  }

  .pricing-card,
  .form,
  .cta-strip,
  .card {
    padding: var(--space-5);
  }

  .pricing-card__price {
    font-size: 2.5rem;
  }
}