:root {
  --ink: #1c2430;
  --ink-soft: #4a5564;
  --paper: #f6f5f2;
  --paper-deep: #ebe8e2;
  --white: #ffffff;
  --accent: #0d5c63;
  --accent-deep: #08464b;
  --accent-soft: #d8ecee;
  --line: #d9d4cb;
  --danger: #9b2c2c;
  --success: #1f6b4a;
  --radius: 2px;
  --shadow: 0 18px 40px rgba(28, 36, 48, 0.08);
  --font-display: "Newsreader", Georgia, serif;
  --font-body: "Outfit", "Segoe UI", sans-serif;
  --max: 1120px;
  --header-h: 72px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--ink);
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(13, 92, 99, 0.08), transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(28, 36, 48, 0.05), transparent 50%),
    linear-gradient(180deg, var(--paper) 0%, #f3f1ec 100%);
  min-height: 100vh;
}

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

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

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

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 0.6em;
}

h1 {
  font-size: clamp(2.4rem, 5vw, 4rem);
}

h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.55rem);
}

p {
  margin: 0 0 1em;
  color: var(--ink-soft);
}

.container {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--white);
  padding: 0.75rem 1rem;
  z-index: 1000;
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(246, 245, 242, 0.88);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease, background 0.25s ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(246, 245, 242, 0.96);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: 1.5rem;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.03em;
}

.logo:hover {
  color: var(--accent);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.35rem;
}

.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 450;
}

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

.nav-cta {
  padding: 0.55rem 1rem;
  background: var(--accent);
  color: var(--white) !important;
  text-decoration: none !important;
  transition: background 0.2s ease, transform 0.2s ease;
}

.nav-cta:hover {
  background: var(--accent-deep);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0.5rem;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--ink);
  margin: 6px 0;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(4px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.4rem;
  font-family: var(--font-body);
  font-size: 0.98rem;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none !important;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

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

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

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

.btn-ghost {
  background: transparent;
  color: var(--ink) !important;
  border-color: var(--line);
}

.btn-ghost:hover {
  border-color: var(--ink);
  color: var(--ink) !important;
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.75rem;
}

/* Hero */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: grid;
  align-items: end;
  overflow: hidden;
  color: var(--white);
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  animation: heroZoom 18s ease-out forwards;
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, rgba(12, 28, 32, 0.82) 0%, rgba(12, 28, 32, 0.55) 48%, rgba(12, 28, 32, 0.28) 100%),
    linear-gradient(0deg, rgba(12, 28, 32, 0.5) 0%, transparent 45%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(100% - 2.5rem, var(--max));
  margin: 0 auto;
  padding: 5rem 0 4.5rem;
  max-width: 38rem;
  animation: riseIn 0.9s ease both;
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
  opacity: 0.9;
}

.hero h1 {
  color: var(--white);
  margin-bottom: 0.85rem;
}

.hero p {
  color: rgba(255, 255, 255, 0.86);
  font-size: 1.12rem;
  max-width: 32rem;
}

.hero .btn-primary {
  background: var(--white);
  color: var(--ink) !important;
}

.hero .btn-primary:hover {
  background: var(--paper);
}

.hero .btn-ghost {
  color: var(--white) !important;
  border-color: rgba(255, 255, 255, 0.45);
}

.hero .btn-ghost:hover {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

/* Sections */
.section {
  padding: 5.5rem 0;
}

.section-tight {
  padding: 3.5rem 0;
}

.section-alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.55), rgba(235, 232, 226, 0.65));
  border-block: 1px solid var(--line);
}

.section-head {
  max-width: 36rem;
  margin-bottom: 2.75rem;
}

.section-head p {
  font-size: 1.08rem;
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 0.75rem;
}

/* Split layout */
.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3.5rem;
  align-items: center;
}

.split-media {
  position: relative;
  overflow: hidden;
  min-height: 360px;
}

.split-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 360px;
}

/* Feature list */
.feature-list {
  list-style: none;
  padding: 0;
  margin: 2rem 0 0;
  display: grid;
  gap: 1.25rem;
}

.feature-list li {
  padding-left: 1.35rem;
  border-left: 2px solid var(--accent);
}

.feature-list strong {
  display: block;
  color: var(--ink);
  font-weight: 560;
  margin-bottom: 0.2rem;
}

.feature-list p {
  margin: 0;
  font-size: 0.98rem;
}

/* Course / content grids */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}

.course-item,
.blog-item,
.price-tier,
.review-block {
  background: transparent;
}

.course-item a,
.blog-item a {
  text-decoration: none;
  color: inherit;
  display: block;
}

.course-item img,
.blog-item img,
.page-hero-media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.course-item:hover img,
.blog-item:hover img {
  transform: scale(1.03);
}

.media-frame {
  overflow: hidden;
  margin-bottom: 1.1rem;
  background: var(--paper-deep);
}

.course-item h3,
.blog-item h3 {
  margin-bottom: 0.4rem;
  color: var(--ink);
}

.meta {
  font-size: 0.88rem;
  color: var(--ink-soft);
  margin-bottom: 0.55rem;
}

/* Trust strip */
.trust-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  padding: 2.5rem 0;
  border-block: 1px solid var(--line);
}

.trust-item strong {
  display: block;
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.03em;
}

.trust-item span {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

/* Testimonials */
.quote {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.2vw, 1.65rem);
  line-height: 1.4;
  color: var(--ink);
  margin: 0 0 1.25rem;
}

.quote-attr {
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.review-block {
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--line);
}

.review-block:last-child {
  border-bottom: 0;
}

.stars {
  letter-spacing: 0.12em;
  color: var(--accent);
  font-size: 0.85rem;
  margin-bottom: 0.65rem;
}

/* Pricing */
.price-tier {
  padding: 2rem 0;
  border-top: 1px solid var(--line);
}

.price-tier:last-child {
  border-bottom: 1px solid var(--line);
}

.price-tier-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}

.price-amount {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--ink);
}

.price-tier ul {
  margin: 1.25rem 0 1.5rem;
  padding-left: 1.1rem;
  color: var(--ink-soft);
}

.price-tier.featured {
  background: linear-gradient(90deg, var(--accent-soft), transparent);
  padding-inline: 1.25rem;
  margin-inline: -1.25rem;
}

/* Page hero (inner) */
.page-hero {
  padding: 4rem 0 2.5rem;
}

.page-hero h1 {
  max-width: 18ch;
}

.page-hero-lead {
  max-width: 38rem;
  font-size: 1.15rem;
}

.page-hero-media {
  margin-top: 2.5rem;
  overflow: hidden;
  max-height: 420px;
}

.page-hero-media img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  aspect-ratio: auto;
}

/* Forms */
.form {
  display: grid;
  gap: 1.15rem;
  max-width: 36rem;
}

.form-row {
  display: grid;
  gap: 0.4rem;
}

.form-row label {
  font-size: 0.92rem;
  font-weight: 520;
  color: var(--ink);
}

.form-row input,
.form-row select,
.form-row textarea {
  font: inherit;
  padding: 0.8rem 0.95rem;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--ink);
  border-radius: var(--radius);
  width: 100%;
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  outline: 2px solid var(--accent-soft);
  border-color: var(--accent);
}

.form-row textarea {
  min-height: 140px;
  resize: vertical;
}

.field-error {
  color: var(--danger);
  font-size: 0.88rem;
  min-height: 1.2em;
}

.form-status {
  padding: 0.85rem 1rem;
  font-size: 0.95rem;
  display: none;
}

.form-status.is-visible {
  display: block;
}

.form-status.success {
  background: #e8f5ee;
  color: var(--success);
}

.form-status.error {
  background: #f8eaea;
  color: var(--danger);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
}

.contact-aside {
  padding-top: 0.5rem;
}

.contact-aside address {
  font-style: normal;
  color: var(--ink-soft);
  margin-bottom: 1.25rem;
}

/* FAQ */
.faq details {
  border-bottom: 1px solid var(--line);
  padding: 1.15rem 0;
}

.faq summary {
  cursor: pointer;
  font-weight: 520;
  color: var(--ink);
  list-style: none;
}

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

.faq details[open] summary {
  color: var(--accent);
}

.faq details p {
  margin: 0.75rem 0 0;
}

/* Legal */
.legal {
  max-width: 44rem;
  padding-bottom: 4rem;
}

.legal h2 {
  margin-top: 2.25rem;
  font-size: 1.55rem;
}

.legal table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}

.legal th,
.legal td {
  border: 1px solid var(--line);
  padding: 0.7rem 0.8rem;
  text-align: left;
  vertical-align: top;
}

.legal th {
  background: var(--paper-deep);
  color: var(--ink);
}

/* Modules */
.module-list {
  counter-reset: module;
  list-style: none;
  padding: 0;
  margin: 0;
}

.module-list li {
  counter-increment: module;
  padding: 1.35rem 0 1.35rem 3.5rem;
  border-bottom: 1px solid var(--line);
  position: relative;
}

.module-list li::before {
  content: counter(module, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1.35rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--accent);
}

/* Footer */
.site-footer {
  background: #12181f;
  color: rgba(255, 255, 255, 0.72);
  padding: 4rem 0 2rem;
  margin-top: 2rem;
}

.site-footer .logo {
  color: var(--white);
}

.site-footer a {
  color: rgba(255, 255, 255, 0.78);
  text-decoration: none;
}

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

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.3fr;
  gap: 2rem;
}

.footer-heading {
  font-family: var(--font-body);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.55rem;
}

.footer-brand p,
.footer-address {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.62);
  font-style: normal;
}

.footer-bottom {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.88rem;
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.45);
  margin: 0;
}

/* Cookie banner */
.cookie-banner {
  position: fixed;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  z-index: 200;
  max-width: 520px;
  margin-inline: auto;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 1.35rem 1.4rem;
  display: none;
  animation: riseIn 0.4s ease both;
}

.cookie-banner.is-visible {
  display: block;
}

.cookie-banner p {
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.cookie-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.cookie-actions .btn {
  padding: 0.65rem 1.05rem;
  font-size: 0.92rem;
}

/* 404 */
.error-page {
  min-height: 60vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 4rem 0;
}

.error-page .code {
  font-family: var(--font-display);
  font-size: clamp(4rem, 12vw, 7rem);
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.5rem;
}

/* Instructor */
.instructor {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 1.5rem;
  align-items: start;
}

.instructor img {
  width: 140px;
  height: 140px;
  object-fit: cover;
  border-radius: 50%;
}

/* Case study */
.case-study {
  padding: 2rem 0;
  border-top: 1px solid var(--line);
}

.case-study + .case-study {
  margin-top: 1rem;
}

/* Motion */
@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes heroZoom {
  from {
    transform: scale(1.08);
  }
  to {
    transform: scale(1);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.inline-error {
  background: #f8eaea;
  color: var(--danger);
  padding: 0.75rem 1rem;
  margin: 0.75rem 0;
  font-size: 0.92rem;
}

/* Responsive */
@media (max-width: 900px) {
  .split,
  .grid-3,
  .grid-2,
  .contact-grid,
  .footer-grid,
  .trust-strip {
    grid-template-columns: 1fr;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    background: rgba(246, 245, 242, 0.98);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    padding: 1rem 1.25rem 1.35rem;
    gap: 0;
    display: none;
  }

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

  .site-nav a {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--line);
  }

  .site-nav .nav-cta {
    margin-top: 0.75rem;
    text-align: center;
    border: 0;
  }

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

  .hero {
    min-height: 85vh;
  }

  .price-tier.featured {
    margin-inline: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

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