:root {
  --ink: #14202b;
  --muted: #4a5d6e;
  --line: #c8d5e0;
  --accent: #0b4f6c;
  --accent-deep: #063748;
  --accent-soft: #d7e8f0;
  --surface: #f2f7fa;
  --white: #ffffff;
  --focus: #0a7ea4;
  --danger: #8b2e2e;
  --shadow: 0 18px 48px rgba(10, 40, 58, 0.14);
  --font-display: "Fraunces", "Georgia", serif;
  --font-body: "Source Sans 3", "Segoe UI", sans-serif;
  --header-h: 4.25rem;
  --max: 70rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  background: var(--white);
}

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

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent-deep);
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 1000;
  background: var(--accent);
  color: var(--white);
  padding: 0.6rem 1rem;
  border-radius: 0.35rem;
}

.skip-link:focus {
  top: 1rem;
}

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  isolation: isolate;
  overflow: hidden;
  background: transparent;
  border-bottom: 1px solid rgba(200, 213, 224, 0.75);
  transform: translateY(-100%);
  animation: headerIn 0.7s var(--ease) 0.1s forwards;
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-color: var(--surface);
  background-image:
    linear-gradient(
      105deg,
      rgba(242, 247, 250, 0.88) 0%,
      rgba(215, 232, 240, 0.78) 45%,
      rgba(242, 247, 250, 0.86) 100%
    ),
    url("../assets/images-ergometer.jpg"),
    url("../assets/cpet-machine.jpg"),
    url("../assets/cpet-test.jpg");
  background-size:
    auto,
    34% 160%,
    34% 160%,
    34% 160%;
  background-position:
    center,
    left center,
    center center,
    right center;
  background-repeat: no-repeat;
}

@keyframes headerIn {
  to {
    transform: translateY(0);
  }
}

.header-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-h);
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  text-decoration: none;
  color: var(--ink);
  min-width: 0;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.brand-tag {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--white);
  border-radius: 0.4rem;
  padding: 0.55rem 0.7rem;
  cursor: pointer;
  color: var(--ink);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem 1.1rem;
}

.site-nav a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.95rem;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--accent-deep);
}

.header-phone {
  white-space: nowrap;
  color: var(--accent-deep) !important;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.85rem 1.25rem;
  border-radius: 0.4rem;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.2s var(--ease), background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
  text-decoration: none;
}

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

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

.btn-secondary {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.55);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--white);
}

.btn-outline {
  background: transparent;
  color: var(--accent-deep);
  border-color: var(--accent);
}

.btn-outline:hover {
  background: var(--accent-soft);
  color: var(--accent-deep);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

/* Hero */
.hero {
  position: relative;
  min-height: 0;
  display: grid;
  align-items: end;
  color: var(--white);
  overflow: hidden;
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background-color: var(--accent-deep);
  background-image:
    linear-gradient(
      115deg,
      rgba(6, 40, 55, 0.72) 0%,
      rgba(11, 79, 108, 0.62) 48%,
      rgba(8, 55, 74, 0.55) 100%
    ),
    url("../assets/images-ergometer.jpg"),
    url("../assets/cpet-machine.jpg");
  background-size:
    auto,
    34% 100%,
    48% 100%;
  background-position:
    center,
    left center,
    36% center;
  background-repeat: no-repeat;
}

.hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 34%;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(
      rgba(11, 79, 108, 0.6),
      rgba(11, 79, 108, 0.6)
    ),
    url("../assets/cpet-test.jpg");
  background-size: auto, cover;
  background-position: center, center;
  background-repeat: no-repeat;
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 12%, black 100%);
  mask-image: linear-gradient(to right, transparent 0%, black 12%, black 100%);
}

.hero-inner {
  width: min(100% - 2rem, var(--max));
  margin: 0 auto;
  padding: clamp(1.75rem, 4vh, 2.75rem) 0;
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.5vw, 2.35rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin: 0 0 0.55rem;
  max-width: 18ch;
  opacity: 0;
  transform: translateY(1.25rem);
  animation: riseIn 0.9s var(--ease) 0.25s forwards;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.6vw, 1.75rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0 0 0.55rem;
  max-width: 22ch;
  opacity: 0;
  transform: translateY(1.25rem);
  animation: riseIn 0.9s var(--ease) 0.4s forwards;
}

.hero-sub {
  margin: 0 0 1rem;
  max-width: 38rem;
  font-size: 1.02rem;
  line-height: 1.45;
  color: rgba(255, 255, 255, 0.9);
  opacity: 0;
  transform: translateY(1.25rem);
  animation: riseIn 0.9s var(--ease) 0.55s forwards;
}

.hero .cta-row {
  opacity: 0;
  transform: translateY(1.25rem);
  animation: riseIn 0.9s var(--ease) 0.7s forwards;
}

/* Compact home page vertical rhythm */
.page-home .btn {
  padding: 0.65rem 1.05rem;
  font-size: 0.95rem;
}

.page-home .section {
  padding: clamp(1.5rem, 3.5vh, 2.25rem) 0;
}

.page-home .section-title {
  font-size: clamp(1.35rem, 2.4vw, 1.75rem);
  margin-bottom: 0.4rem;
}

.page-home .section-lead {
  margin-bottom: 0.9rem;
  font-size: 1.02rem;
}

.page-home .feature-list {
  gap: 0.55rem;
}

.page-home .panel {
  padding: 1rem 1.15rem;
}

.page-home .stat-strip {
  grid-template-columns: repeat(3, 1fr);
  gap: 0.65rem;
}

.page-home .stat strong {
  font-size: 1.2rem;
}

.page-home .stat span {
  font-size: 0.88rem;
}

.page-home .metro-list {
  margin-top: 0.25rem;
  margin-bottom: 0.75rem;
}

.page-home .metro-list + .feature-list {
  margin-top: 0;
}

.page-home .site-footer {
  padding: 1.75rem 0 1.25rem;
}

.page-home .footer-bottom {
  margin-top: 1.25rem;
  padding-top: 0.85rem;
}

@media (max-width: 700px) {
  .page-home .stat-strip {
    grid-template-columns: 1fr;
  }
}

@keyframes riseIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Page hero (inner pages) */
.page-hero {
  background:
    linear-gradient(120deg, #0a3a50 0%, #0b4f6c 55%, #165f72 100%);
  color: var(--white);
  padding: clamp(2.75rem, 7vh, 4.5rem) 0;
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 0.75rem;
  line-height: 1.15;
}

.page-hero p {
  margin: 0;
  max-width: 38rem;
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.1rem;
}

/* Sections */
.section {
  padding: clamp(3rem, 7vh, 4.75rem) 0;
}

.section-alt {
  background:
    linear-gradient(180deg, var(--surface) 0%, #eaf2f6 100%);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.2rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 0.75rem;
  line-height: 1.2;
}

.section-lead {
  margin: 0 0 2rem;
  max-width: 40rem;
  color: var(--muted);
  font-size: 1.1rem;
}

.metro-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.metro-list li {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  font-weight: 600;
  color: var(--accent-deep);
  font-size: 0.95rem;
}

.feature-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1rem;
}

.feature-list li {
  position: relative;
  padding-left: 1.5rem;
  max-width: 40rem;
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--accent);
}

.split {
  display: grid;
  gap: 2rem;
}

@media (min-width: 800px) {
  .split {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: start;
    gap: 3rem;
  }
}

.panel {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.panel h2,
.panel h3 {
  font-family: var(--font-display);
  margin: 0 0 0.75rem;
  letter-spacing: -0.02em;
}

.panel p:last-child,
.panel ul:last-child {
  margin-bottom: 0;
}

.stat-strip {
  display: grid;
  gap: 1rem;
}

@media (min-width: 700px) {
  .stat-strip {
    grid-template-columns: repeat(3, 1fr);
  }
}

.stat {
  border-top: 3px solid var(--accent);
  padding-top: 0.85rem;
}

.stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.55rem;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 0.35rem;
}

.stat span {
  color: var(--muted);
  font-size: 0.98rem;
}

.steps {
  counter-reset: step;
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1.25rem;
}

.steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.9rem;
  align-items: start;
}

.steps li::before {
  content: counter(step);
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--white);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.95rem;
}

.steps h3 {
  margin: 0 0 0.25rem;
  font-size: 1.1rem;
}

.steps p {
  margin: 0;
  color: var(--muted);
}

/* FAQ */
.faq {
  display: grid;
  gap: 0.65rem;
}

.faq details {
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  background: var(--white);
  padding: 0.15rem 1rem;
}

.faq summary {
  cursor: pointer;
  font-weight: 700;
  padding: 0.95rem 0;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  color: var(--accent);
  font-size: 1.35rem;
  font-weight: 500;
  transition: transform 0.2s var(--ease);
}

.faq details[open] summary::after {
  content: "–";
}

.faq details p {
  margin: 0 0 1rem;
  color: var(--muted);
}

/* Forms */
.form {
  display: grid;
  gap: 1rem;
}

.form-row {
  display: grid;
  gap: 1rem;
}

@media (min-width: 700px) {
  .form-row.two {
    grid-template-columns: 1fr 1fr;
  }
}

label {
  display: grid;
  gap: 0.35rem;
  font-weight: 600;
  font-size: 0.95rem;
}

input,
select,
textarea {
  font: inherit;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 0.4rem;
  padding: 0.75rem 0.85rem;
  background: var(--white);
  width: 100%;
}

textarea {
  min-height: 7rem;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--focus);
  outline-offset: 1px;
  border-color: var(--focus);
}

.form-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.form-error {
  color: var(--danger);
  font-size: 0.92rem;
  margin: 0;
  display: none;
}

.form-error.visible {
  display: block;
}

.form-success {
  display: none;
  margin: 0;
  padding: 0.85rem 1rem;
  border-radius: 0.45rem;
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-weight: 600;
}

.form-success.visible {
  display: block;
}

.contact-details {
  margin: 0;
  display: grid;
  gap: 1rem;
}

.contact-details div {
  display: grid;
  gap: 0.2rem;
}

.contact-details dt {
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
}

.contact-details dd {
  margin: 0;
  font-weight: 600;
}

.contact-details a {
  text-decoration: none;
}

/* Footer */
.site-footer {
  background: var(--accent-deep);
  color: rgba(255, 255, 255, 0.88);
  padding: 2.75rem 0 2rem;
  margin-top: 0;
}

.footer-grid {
  display: grid;
  gap: 1.75rem;
}

@media (min-width: 800px) {
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr;
  }
}

.site-footer h2 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin: 0 0 0.65rem;
  color: var(--white);
}

.site-footer p,
.site-footer li {
  margin: 0 0 0.45rem;
  font-size: 0.98rem;
}

.site-footer a {
  color: #d7eef7;
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--white);
  text-decoration: underline;
}

.site-footer ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-bottom {
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
}

/* Utility */
.muted {
  color: var(--muted);
}

.stack > * + * {
  margin-top: 0.85rem;
}

/* Mobile nav */
@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--white);
    border-bottom: 1px solid var(--line);
    padding: 0.5rem 1rem 1rem;
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 0.75rem 0.25rem;
    border-bottom: 1px solid var(--surface);
  }

  .header-phone {
    border-bottom: none !important;
  }
}