/* ── Reset & base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --clr-amber: #c86e1b;
  --clr-amber-light: #e08a33;
  --clr-charcoal: #2c2c2c;
  --clr-charcoal-light: #3d3d3d;
  --clr-off-white: #f5f2ed;
  --clr-warm-gray: #a09888;
  --clr-link: #c86e1b;
  --ff-heading: Georgia, "Times New Roman", serif;
  --ff-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --max-w: 980px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--ff-body);
  color: var(--clr-charcoal);
  background: var(--clr-off-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a { color: var(--clr-link); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Header ── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  height: 56px;
  background: var(--clr-charcoal);
  color: #fff;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: #fff;
  font-family: var(--ff-heading);
  font-size: 1.125rem;
  letter-spacing: 0.02em;
}
.site-logo:hover { text-decoration: none; }
.site-logo img { border-radius: 4px; }

.site-nav { display: flex; gap: 1.5rem; }
.nav-link {
  color: rgba(255,255,255,.75);
  font-size: 0.9rem;
  letter-spacing: 0.03em;
  transition: color .2s;
}
.nav-link:hover, .nav-link.active { color: #fff; text-decoration: none; }

/* ── Hero ── */
.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  color: #fff;
  text-align: center;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.32);
}
.hero-content {
  position: relative;
  z-index: 1;
  padding: 2rem;
}
.hero-content h1 {
  font-family: var(--ff-heading);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 0.5rem;
}
.hero-content p {
  font-size: clamp(1rem, 2vw, 1.25rem);
  opacity: .9;
  max-width: 36em;
}

.scroll-cue {
  position: absolute;
  bottom: 2rem;
  z-index: 1;
  background: none;
  border: none;
  color: rgba(255,255,255,.6);
  cursor: pointer;
  animation: bob 2.4s ease-in-out infinite;
}
@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

/* ── Intro ── */
.intro {
  padding: 4.5rem 2rem;
  background: #fff;
}
.intro-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 3rem;
}
.intro-logo { flex-shrink: 0; }
.intro-text h2 {
  font-family: var(--ff-heading);
  font-size: 1.6rem;
  color: var(--clr-warm-gray);
  margin-bottom: 0.75rem;
  font-weight: 400;
}
.intro-text p {
  font-size: 1.05rem;
  line-height: 1.65;
}

/* ── Section rules ── */
.section-rule {
  border: none;
  border-top: 1px solid #ddd;
  max-width: var(--max-w);
  margin: 0 auto;
}

/* ── Video ── */
.video-section {
  padding: 3rem 2rem;
  background: #fff;
}
.video-wrap {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: 4px;
  box-shadow: 0 4px 24px rgba(0,0,0,.12);
}
.video-wrap iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* ── Features ── */
.features {
  padding: 3rem 2rem 4rem;
  background: #fff;
}
.feature-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem 3rem;
}
.feature-card {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
}
.feature-card img {
  width: 220px;
  flex-shrink: 0;
  border-radius: 3px;
  object-fit: cover;
  aspect-ratio: 1;
}
.feature-body h3 {
  font-family: var(--ff-heading);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
}
.feature-body p {
  font-size: 0.925rem;
  line-height: 1.6;
}

/* ── Concept sections ── */
.concept-section {
  padding: 3rem 2rem;
  background: #fff;
}
.concept-block {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  gap: 2.5rem;
  align-items: center;
}
.concept-block .video-wrap {
  flex: 1 1 55%;
  padding-bottom: 0;
  height: auto;
  aspect-ratio: 16/9;
  box-shadow: none;
}
.concept-text {
  flex: 1 1 40%;
}
.concept-text h3 {
  font-family: var(--ff-heading);
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}
.concept-text p {
  font-size: 0.95rem;
  line-height: 1.65;
}

/* ── Credits ── */
.credits {
  padding: 2.5rem 2rem;
  background: #fff;
  text-align: center;
}
.credits p {
  font-size: 0.875rem;
  color: #666;
  margin-bottom: 0.5rem;
}
.credits a { color: var(--clr-link); }

/* ── Contact form ── */
.contact-section {
  padding: 3.5rem 2rem;
  background: #fff;
}
.contact-section h2 {
  font-family: var(--ff-heading);
  font-size: 1.5rem;
  text-align: center;
  margin-bottom: 2rem;
  font-weight: 400;
  color: var(--clr-warm-gray);
}
.contact-form {
  max-width: 520px;
  margin: 0 auto;
}
.form-field {
  margin-bottom: 1.25rem;
}
.form-field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: var(--clr-charcoal);
}
.form-field input,
.form-field textarea {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid #ccc;
  border-radius: 3px;
  font-family: var(--ff-body);
  font-size: 0.95rem;
  background: var(--clr-off-white);
  transition: border-color .2s;
}
.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--clr-amber);
}
.form-field textarea { resize: vertical; }
.form-submit {
  display: inline-block;
  padding: 0.65rem 2rem;
  background: var(--clr-charcoal);
  color: #fff;
  border: none;
  border-radius: 3px;
  font-family: var(--ff-body);
  font-size: 0.9rem;
  cursor: pointer;
  transition: background .2s;
}
.form-submit:hover { background: var(--clr-charcoal-light); }
.form-submit:disabled { opacity: .6; cursor: default; }

.form-success {
  max-width: 520px;
  margin: 0 auto;
  text-align: center;
  padding: 2rem;
}
.form-success p {
  font-size: 1.05rem;
  color: var(--clr-charcoal);
}

/* ── Footer ── */
.site-footer {
  padding: 2rem 2rem;
  text-align: center;
  background: var(--clr-charcoal);
  color: rgba(255,255,255,.65);
  font-size: 0.85rem;
}

/* ── About page ── */
.page-heading {
  padding: 5rem 2rem 2rem;
  text-align: center;
  background: #fff;
}
.page-heading h1 {
  font-family: var(--ff-heading);
  font-size: 1.6rem;
  color: var(--clr-warm-gray);
  font-weight: 400;
}

.about-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 2rem 3rem;
  background: #fff;
}
.about-content h2 {
  font-family: var(--ff-heading);
  font-size: 1.25rem;
  font-weight: 700;
  text-align: center;
  margin: 2.5rem 0 1rem;
}
.about-content h2:first-child { margin-top: 0; }
.about-content p {
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 1rem;
}
.about-content a { color: var(--clr-link); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .site-header { padding: 0 1rem; }

  .intro-inner {
    flex-direction: column;
    text-align: center;
    gap: 1.5rem;
  }
  .intro-logo { width: 100px; height: 100px; }

  .feature-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .feature-card {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .feature-card img { width: 100%; max-width: 320px; }

  .concept-block {
    flex-direction: column;
  }
  .concept-block .video-wrap {
    width: 100%;
    padding-bottom: 56.25%;
    aspect-ratio: auto;
  }
  .concept-text { text-align: center; }
}

@media (max-width: 480px) {
  .hero-content h1 { font-size: 2rem; }
  .hero-content p { font-size: 0.95rem; }
  .site-header { height: 48px; }
}