/* Smart Neural AI — Charter Ink theme */
:root {
  --ink: #1a2e28;
  --ink-soft: #3d524a;
  --paper: #e8ece6;
  --mist: #d4dbd2;
  --surface: #f7f9f5;
  --forest: #1e4d3a;
  --forest-mid: #2d6a4f;
  --sage: #7a9e8c;
  --slate: #4a5c72;
  --line: rgba(26, 46, 40, 0.14);
  --danger: #8b3a3a;
  --ok: #1e4d3a;
  --shadow: 0 20px 48px rgba(26, 46, 40, 0.1);
  --radius: 3px;
  --font-display: "Newsreader", "Georgia", serif;
  --font-ui: "Karla", "Segoe UI", sans-serif;
  --max: 70rem;
  --header-h: 4.25rem;
  --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-ui);
  font-size: 1.0625rem;
  line-height: 1.65;
  background-color: var(--paper);
  background-image:
    linear-gradient(160deg, rgba(125, 158, 140, 0.18) 0%, transparent 38%),
    linear-gradient(340deg, rgba(74, 92, 114, 0.1) 0%, transparent 42%),
    repeating-linear-gradient(
      -12deg,
      transparent,
      transparent 36px,
      rgba(26, 46, 40, 0.03) 36px,
      rgba(26, 46, 40, 0.03) 37px
    );
  min-height: 100vh;
}

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

a {
  color: var(--forest);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--ink);
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.18;
  color: var(--ink);
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.4rem, 5.8vw, 4.1rem);
  margin: 0 0 0.75rem;
}

h2 {
  font-size: clamp(1.75rem, 3.2vw, 2.45rem);
  margin: 0 0 0.65rem;
}

h3 {
  font-size: 1.3rem;
  margin: 0 0 0.45rem;
}

p {
  margin: 0 0 1rem;
}

.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;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 1000;
  background: var(--ink);
  color: var(--surface);
  padding: 0.6rem 1rem;
  text-decoration: none;
}

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

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

.inline-error {
  background: #f3dede;
  color: var(--danger);
  padding: 0.85rem 1.1rem;
  border-left: 3px solid var(--danger);
  margin: 0.5rem 1rem;
  font-size: 0.95rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 249, 245, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--ink);
}

.brand-mark {
  width: 1.35rem;
  height: 1.35rem;
  background: linear-gradient(135deg, var(--forest) 40%, var(--sage) 100%);
  clip-path: polygon(50% 0%, 100% 38%, 82% 100%, 18% 100%, 0% 38%);
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--line);
  width: 2.6rem;
  height: 2.6rem;
  border-radius: var(--radius);
  cursor: pointer;
  position: relative;
}

.nav-toggle-bar,
.nav-toggle-bar::before,
.nav-toggle-bar::after {
  content: "";
  display: block;
  width: 1.1rem;
  height: 2px;
  background: var(--ink);
  margin: 0 auto;
  position: relative;
}

.nav-toggle-bar::before {
  position: absolute;
  top: -5px;
  left: 0;
}

.nav-toggle-bar::after {
  position: absolute;
  top: 5px;
  left: 0;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 0.15rem 1.15rem;
}

.nav-list a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.95rem;
  font-weight: 500;
}

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

.nav-cta {
  background: var(--forest);
  color: var(--surface) !important;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius);
}

.nav-cta:hover {
  background: var(--ink);
  color: var(--surface) !important;
}

/* Hero — full-bleed */
.hero-bleed {
  position: relative;
  min-height: min(92vh, 52rem);
  display: grid;
  align-items: end;
  color: var(--surface);
  overflow: hidden;
}

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

.hero-bleed-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  animation: heroRise 1.4s var(--ease) both;
}

.hero-bleed::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(180deg, rgba(26, 46, 40, 0.25) 0%, rgba(26, 46, 40, 0.72) 55%, rgba(26, 46, 40, 0.92) 100%);
}

.hero-bleed-content {
  position: relative;
  z-index: 2;
  width: min(100% - 2.5rem, var(--max));
  margin: 0 auto 3.5rem;
  animation: fadeUp 0.9s var(--ease) 0.15s both;
}

.hero-brand-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 9vw, 6.5rem);
  font-weight: 600;
  line-height: 0.95;
  margin: 0 0 1.25rem;
  letter-spacing: -0.03em;
  max-width: 12ch;
}

.hero-bleed .lede {
  color: rgba(247, 249, 245, 0.9);
  max-width: 36rem;
  font-size: 1.15rem;
}

.hero-bleed .btn-primary {
  background: var(--surface);
  color: var(--ink);
}

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

.page-hero {
  padding: 3.5rem 0 2rem;
}

.page-hero .eyebrow {
  margin-bottom: 0.75rem;
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--slate);
  margin: 0;
}

.lede {
  font-size: 1.12rem;
  color: var(--ink-soft);
  max-width: 40rem;
}

.section {
  padding: 4rem 0;
}

.section-tight {
  padding: 2.5rem 0;
}

/* Buttons */
.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.25rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), transform 0.2s var(--ease);
}

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

.btn-primary {
  background: var(--forest);
  color: var(--surface);
}

.btn-primary:hover {
  background: var(--ink);
  color: var(--surface);
}

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

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

/* Journey / benefits */
.journey-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 2rem;
}

@media (min-width: 720px) {
  .journey-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.journey-step {
  padding: 1.5rem 0;
  border-top: 2px solid var(--forest);
}

.journey-step .step-num {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--sage);
  display: block;
  margin-bottom: 0.5rem;
}

.journey-step p {
  color: var(--ink-soft);
  margin: 0;
}

/* Course tiles */
.course-rail {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 800px) {
  .course-rail {
    grid-template-columns: repeat(3, 1fr);
  }
}

.course-tile {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--surface);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: box-shadow 0.25s var(--ease), transform 0.25s var(--ease);
}

.course-tile:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.course-tile img {
  width: 100%;
  height: 11rem;
  object-fit: cover;
}

.course-tile-body {
  padding: 1.15rem 1.25rem 1.4rem;
}

.course-tile h3 {
  color: var(--ink);
}

.course-tile p {
  color: var(--ink-soft);
  font-size: 0.95rem;
  margin: 0;
}

/* Split / quote */
.split-band {
  background: var(--ink);
  color: var(--surface);
  padding: 3.5rem 0;
}

.split-band h2 {
  color: var(--surface);
}

.split-band .lede {
  color: rgba(247, 249, 245, 0.78);
}

.split-inner {
  display: grid;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 800px) {
  .split-inner {
    grid-template-columns: 1.1fr 0.9fr;
  }
}

.split-band img {
  width: 100%;
  height: 18rem;
  object-fit: cover;
  border-radius: var(--radius);
}

.quote-wide {
  padding: 3.5rem 0;
  border-block: 1px solid var(--line);
}

.quote-wide blockquote {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.5vw, 1.85rem);
  line-height: 1.4;
  font-style: italic;
  max-width: 48rem;
}

.quote-wide cite {
  display: block;
  margin-top: 1.25rem;
  font-style: normal;
  font-size: 0.95rem;
  color: var(--ink-soft);
}

/* Proof */
.proof-row {
  display: grid;
  gap: 1.5rem;
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--line);
}

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

.proof-item strong {
  display: block;
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 600;
  color: var(--forest);
  line-height: 1.1;
}

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

/* Pricing */
.price-grid {
  display: grid;
  gap: 1.25rem;
  margin-top: 2rem;
}

@media (min-width: 800px) {
  .price-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.price-tier {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 1.75rem 1.5rem;
}

.price-tier.is-featured {
  border-color: var(--forest);
  box-shadow: var(--shadow);
}

.price-tier .tier-name {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin: 0 0 0.35rem;
}

.price-tier .tier-price {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--forest);
  margin: 0.75rem 0;
}

.price-tier .tier-note {
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin-bottom: 1.25rem;
}

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

.price-tier li {
  margin-bottom: 0.4rem;
}

.price-note {
  margin-top: 1.5rem;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

/* Reviews */
.review-stack {
  display: grid;
  gap: 1.5rem;
  margin-top: 2rem;
}

.review-item {
  background: var(--surface);
  border-left: 3px solid var(--forest-mid);
  padding: 1.4rem 1.5rem;
}

.review-item.alt {
  border-left-color: var(--slate);
}

.review-item .stars {
  color: var(--forest);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.review-item p {
  margin-bottom: 0.75rem;
}

.review-item footer {
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.case-study {
  margin-top: 3rem;
  padding: 2rem;
  background: var(--ink);
  color: var(--surface);
}

.case-study h3 {
  color: var(--surface);
}

.case-study p {
  color: rgba(247, 249, 245, 0.85);
}

/* Blog */
.blog-list {
  display: grid;
  gap: 1.75rem;
  margin-top: 2rem;
}

.blog-card {
  display: grid;
  gap: 1.25rem;
  text-decoration: none;
  color: inherit;
  background: var(--surface);
  border: 1px solid var(--line);
  overflow: hidden;
}

@media (min-width: 720px) {
  .blog-card {
    grid-template-columns: 16rem 1fr;
  }
}

.blog-card img {
  width: 100%;
  height: 100%;
  min-height: 11rem;
  object-fit: cover;
}

.blog-card-body {
  padding: 1.25rem 1.35rem 1.5rem;
}

.blog-card time {
  font-size: 0.82rem;
  color: var(--slate);
}

.article-body {
  max-width: 42rem;
}

.article-body h2 {
  margin-top: 2.25rem;
}

.article-cover {
  margin: 1.5rem 0 2rem;
  width: 100%;
  max-height: 24rem;
  object-fit: cover;
}

/* Contact */
.contact-grid {
  display: grid;
  gap: 2.5rem;
  margin-top: 2rem;
}

@media (min-width: 800px) {
  .contact-grid {
    grid-template-columns: 1fr 1.1fr;
  }
}

.contact-details address {
  font-style: normal;
  margin-bottom: 1rem;
  color: var(--ink-soft);
}

.form-field {
  margin-bottom: 1.1rem;
}

.form-field label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  font: inherit;
  color: var(--ink);
}

.form-field textarea {
  min-height: 9rem;
  resize: vertical;
}

.form-field.has-error input,
.form-field.has-error select,
.form-field.has-error textarea {
  border-color: var(--danger);
}

.field-error {
  display: none;
  color: var(--danger);
  font-size: 0.85rem;
  margin-top: 0.3rem;
}

.form-field.has-error .field-error {
  display: block;
}

.form-status {
  display: none;
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius);
}

.form-status.is-success {
  display: block;
  background: #dce8e1;
  color: var(--ok);
}

.form-status.is-error {
  display: block;
  background: #f3dede;
  color: var(--danger);
}

/* Legal */
.legal-body {
  max-width: 46rem;
}

.legal-body h2 {
  margin-top: 2.25rem;
  font-size: 1.45rem;
}

.legal-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.92rem;
}

.legal-body th,
.legal-body td {
  border: 1px solid var(--line);
  padding: 0.65rem 0.75rem;
  text-align: left;
  vertical-align: top;
}

.legal-body th {
  background: var(--mist);
}

/* Modules / FAQ */
.module-list {
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.module-list li {
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
}

.module-list strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin-bottom: 0.3rem;
}

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

.faq-list summary {
  cursor: pointer;
  font-weight: 600;
}

.faq-list p {
  margin-top: 0.65rem;
  color: var(--ink-soft);
}

.instructor {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.5rem;
  align-items: center;
}

@media (min-width: 600px) {
  .instructor {
    grid-template-columns: 8rem 1fr;
  }
}

.instructor img {
  width: 8rem;
  height: 8rem;
  object-fit: cover;
  border-radius: 50%;
}

/* Footer */
.site-footer {
  background: var(--ink);
  color: rgba(247, 249, 245, 0.82);
  padding: 3.5rem 0 0;
  margin-top: 4rem;
}

.footer-grid {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
  display: grid;
  gap: 2rem;
}

@media (min-width: 800px) {
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  }
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--surface);
  margin: 0 0 0.75rem;
}

.footer-tag {
  font-size: 0.92rem;
  line-height: 1.55;
}

.footer-heading {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--sage);
  margin: 0 0 0.85rem;
}

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

.footer-links a {
  color: rgba(247, 249, 245, 0.82);
  text-decoration: none;
  font-size: 0.95rem;
}

.footer-links a:hover {
  color: var(--surface);
}

.footer-links li {
  margin-bottom: 0.4rem;
}

.footer-address {
  font-style: normal;
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
}

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

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

.footer-base {
  width: min(100% - 2.5rem, var(--max));
  margin: 2.5rem auto 0;
  padding: 1.25rem 0 1.75rem;
  border-top: 1px solid rgba(247, 249, 245, 0.12);
  font-size: 0.88rem;
}

/* Cookie banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: var(--surface);
  border-top: 1px solid var(--line);
  box-shadow: 0 -8px 32px rgba(26, 46, 40, 0.12);
  transform: translateY(110%);
  transition: transform 0.4s var(--ease);
  padding: 1.15rem 1.25rem;
}

.cookie-banner.is-visible {
  transform: translateY(0);
}

.cookie-banner-inner {
  width: min(100%, var(--max));
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}

.cookie-banner p {
  margin: 0;
  flex: 1 1 18rem;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.cookie-actions {
  display: flex;
  gap: 0.6rem;
}

.cookie-accept,
.cookie-reject {
  font: inherit;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.55rem 1rem;
  border-radius: var(--radius);
  cursor: pointer;
  border: 1px solid var(--line);
}

.cookie-accept {
  background: var(--forest);
  color: var(--surface);
  border-color: var(--forest);
}

.cookie-reject {
  background: transparent;
  color: var(--ink);
}

/* 404 */
.error-page {
  text-align: center;
  padding: 6rem 0 4rem;
}

.error-page .code {
  font-family: var(--font-display);
  font-size: clamp(4rem, 12vw, 7rem);
  color: var(--sage);
  line-height: 1;
  margin: 0;
}

/* Animations */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(1.25rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes heroRise {
  from {
    transform: scale(1.06);
  }
  to {
    transform: scale(1);
  }
}

.reveal {
  animation: fadeUp 0.8s var(--ease) both;
}

/* Mobile nav */
@media (max-width: 860px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s var(--ease);
  }

  .site-nav.is-open {
    max-height: 24rem;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    padding: 1rem 1.25rem 1.25rem;
    gap: 0;
  }

  .nav-list a {
    display: block;
    padding: 0.7rem 0;
  }

  .nav-cta {
    display: inline-block;
    margin-top: 0.5rem;
    text-align: center;
  }
}