/* Hero */
.hero {
  min-height: 650px;

  display: grid;
  grid-template-columns: 1fr 0.9fr;
  align-items: center;
  gap: 80px;

  padding-block: 100px;
}

.eyebrow {
  margin-bottom: 14px;

  color: var(--blue);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 650px;

  font-size: clamp(3.5rem, 8vw, 5rem);
  line-height: 0.95;
  letter-spacing: -0.06em;
}

.hero h1 span {
  display: block;
}

.hero-text {
  max-width: 530px;
  margin-top: 28px;

  color: var(--text-muted);
  font-size: 1.1rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.calculator-preview {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.preview-slide[hidden] {
  display: none;
}

.preview-screenshot {
  display: block;
  width: 100%;
  height: 360px;
  object-fit: cover;
  object-position: top;
}

.preview-placeholder {
  min-height: 360px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 32px;
  background:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px),
    var(--surface-muted);
  background-size: 28px 28px;
  text-align: center;
}

.preview-placeholder-icon {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
  color: var(--blue);
  font-size: 2rem;
}

.preview-placeholder h2 {
  font-size: 1.35rem;
}

.preview-placeholder p {
  color: var(--text-muted);
}

.calculator-preview-link {
  color: var(--blue);
  font-weight: 700;
}

.preview-placeholder-footer {
  color: var(--text-muted);
}

.preview-controls {
  min-height: 62px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  border-top: 1px solid var(--border);
}

.preview-arrow {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  font-size: 1.1rem;
}

.preview-arrow:hover,
.preview-dot:hover {
  border-color: var(--blue);
}

.preview-pagination {
  display: flex;
  align-items: center;
  gap: 8px;
}

.preview-dot {
  width: 9px;
  height: 9px;
  padding: 0;
  border: 1px solid var(--text-muted);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
}

.preview-dot[aria-pressed="true"] {
  border-color: var(--blue);
  background: var(--blue);
}

.preview-count {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

/* Structural illustration */
.structure-card {
  overflow: hidden;

  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);

  transform: rotate(2deg);
  transition: transform 0.3s ease;
}

.structure-card:hover {
  transform: rotate(0deg) translateY(-5px);
}

.card-label,
.card-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;

  color: var(--text-muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
}

.card-label {
  padding: 18px 20px;
  border-bottom: 1px solid var(--border);
}

.card-footer {
  padding: 18px 20px;
  border-top: 1px solid var(--border);
}

.structure-drawing {
  display: block;
  width: 100%;
  min-height: 300px;
  padding: 25px;
}

.structure-drawing line {
  fill: none;
  stroke: var(--drawing);
  stroke-width: 4;
  stroke-linecap: round;
}

.structure-drawing .light-line {
  stroke: var(--drawing-light);
  stroke-width: 2;
}

.structure-drawing circle {
  fill: var(--surface);
  stroke: var(--drawing);
  stroke-width: 4;
}

/* Sections */
.section {
  padding-block: 90px;
}

.section-heading {
  margin-bottom: 32px;
  text-align: center;
}

.section h2,
.about-section h2,
.contact-section h2 {
  max-width: 600px;
  margin-inline: auto;

  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -0.07em;
}

/* Project cards */
.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.project-card {
  min-height: 330px;

  display: flex;
  flex-direction: column;
  align-items: flex-start;

  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);

  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    transform 0.2s ease;
}

.project-card:hover {
  border-color: var(--blue);
  box-shadow: var(--shadow);
  transform: translateY(-5px);
}

.project-top {
  width: 100%;

  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;

  margin-bottom: 42px;
}

.project-type,
.project-number {
  color: var(--blue);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.project-card h3 {
  font-size: 1.25rem;
}

.project-card p {
  margin-top: 10px;

  color: var(--text-muted);
  font-size: 0.92rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.project-tags span,
.skills span {
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--blue-soft);
  color: var(--blue);
  font-size: 0.72rem;
  font-weight: 700;
}

.project-link {
  margin-top: auto;
  padding-top: 24px;

  color: var(--blue);
  font-size: 0.9rem;
  font-weight: 700;
}

.project-link:hover {
  color: var(--blue-dark);
}

/* About */
.about-section {
  border-block: 1px solid var(--border);
  background: var(--surface);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 80px;

  padding-block: 90px;
}

.about-text {
  max-width: 520px;
  color: var(--text-muted);
}

.skills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

/* Contact */
.contact-section {
  text-align: center;
}

.contact-section .eyebrow {
  margin-bottom: 20px;
}

.contact-section > p:not(.eyebrow) {
  max-width: 500px;
  margin: 20px auto 28px;
  color: var(--text-muted);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
}

.footer-content {
  min-height: 80px;

  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;

  color: var(--text-muted);
  font-size: 0.85rem;
}

.social-links {
  display: flex;
  gap: 18px;
}

.social-links a:hover {
  color: var(--blue);
}

/* Tablet */
@media (max-width: 850px) {
  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 55px;
    padding-block: 80px;
  }

  .structure-card {
    width: min(100%, 620px);
    margin-inline: auto;
  }

  .calculator-preview {
    width: min(100%, 620px);
    margin-inline: auto;
  }

  .preview-placeholder {
    min-height: 300px;
  }

  .preview-screenshot {
    height: 300px;
    object-fit: contain;
    background: var(--surface-muted);
  }

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

  .project-card {
    min-height: 280px;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: 25px;
    padding-block: 70px;
  }
}

/* Mobile */
@media (max-width: 560px) {
  .hero {
    padding-block: 70px;
  }

  .hero h1 {
    font-size: clamp(2.5rem, 12vw, 3.5rem);
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .structure-drawing {
    min-height: 230px;
    padding: 15px;
  }

  .card-label,
  .card-footer {
    font-size: 0.6rem;
  }

  .section {
    padding-block: 65px;
  }

  .footer-content {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding-block: 20px;
  }
}