:root {
  --bg: #0b0d10;
  --surface: #11151a;
  --surface-hover: #171c22;
  --text: #f2f4f7;
  --muted: #9ba5b1;
  --border: #252c34;
  --accent: #dce7f2;

  --max-width: 1180px;
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  border-bottom: 1px solid var(--border);
}

.brand {
  font-weight: 700;
  letter-spacing: 0.08em;
  font-size: 15px;
  white-space: nowrap;
}

.nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav a {
  color: var(--muted);
  font-size: 14px;
  transition: color 0.2s ease;
}

.nav a:hover {
  color: var(--text);
}

.hero {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 120px 28px 90px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
}

.hero h1 {
  max-width: 900px;
  margin: 0;
  font-size: clamp(48px, 8vw, 88px);
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.hero-description {
  max-width: 720px;
  margin: 30px 0 0;
  color: var(--muted);
  font-size: 19px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 35px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  background: var(--surface);
  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    transform 0.2s ease;
}

.button:hover {
  background: var(--surface-hover);
  border-color: #3a434e;
  transform: translateY(-2px);
}

.button.primary {
  background: var(--accent);
  color: #0b0d10;
  border-color: var(--accent);
}

.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 30px 28px 100px;
}

.section-heading {
  margin-bottom: 28px;
}

.section-heading h2 {
  margin: 0;
  font-size: 32px;
  letter-spacing: -0.03em;
}

.section-heading p {
  margin: 8px 0 0;
  color: var(--muted);
}

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

.card {
  display: block;
  padding: 28px;
  min-height: 190px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition:
    transform 0.2s ease,
    background 0.2s ease,
    border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  background: var(--surface-hover);
  border-color: #343d47;
}

.card-number {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.card h3 {
  margin: 20px 0 8px;
  font-size: 22px;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.site-footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 30px 28px 50px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 800px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    justify-content: flex-start;
    gap: 16px;
  }

  .hero {
    padding-top: 80px;
  }

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

.about-text {
  max-width: 760px;
}

.about-text p {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 18px;
}


.education-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.education-card h3 {
  margin: 16px 0 4px;
  font-size: 25px;
}

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

.education-status {
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}

.record-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.record {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 26px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  transition:
    background 0.2s ease,
    transform 0.2s ease;
}

.record:hover {
  background: var(--surface-hover);
  transform: translateX(5px);
}

.record h3 {
  margin: 5px 0 0;
  font-size: 18px;
}

.record-arrow {
  color: var(--muted);
  font-size: 20px;
}

@media (max-width: 600px) {
  .education-card {
    align-items: flex-start;
    flex-direction: column;
  }
}

.record p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.record-disabled {
  cursor: default;
}

.record-disabled:hover {
  transform: none;
}

.record-label {
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  white-space: nowrap;
}

.document-note {
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.document-note h2 {
  margin: 14px 0 8px;
  font-size: 25px;
  letter-spacing: -0.03em;
}

.document-note p {
  max-width: 700px;
  margin: 0;
  color: var(--muted);
}

@media (max-width: 600px) {
  .record {
    align-items: flex-start;
    gap: 20px;
  }

  .record-label {
    margin-top: 4px;
  }

  .document-note {
    padding: 26px;
  }
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.project-card {
  padding: 30px;
  min-height: 280px;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition:
    transform 0.2s ease,
    background 0.2s ease,
    border-color 0.2s ease;
}

.project-card:hover {
  transform: translateY(-4px);
  background: var(--surface-hover);
  border-color: #343d47;
}

.project-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.project-status {
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.project-card h3 {
  margin: 28px 0 10px;
  font-size: 25px;
  letter-spacing: -0.03em;
}

.project-card > p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.project-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
  padding-top: 28px;
}

.project-meta span {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 11px;
}

@media (max-width: 700px) {
  .project-grid {
    grid-template-columns: 1fr;
  }
}

/* =========================================
   CERTIFICATES
   ========================================= */

.certificate-hero {
  padding-bottom: 70px;
}

.certificate-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.certificate-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 430px;
  padding: 30px;
  overflow: hidden;
  background:
    linear-gradient(
      145deg,
      var(--surface),
      #0e1216
    );
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition:
    transform 0.25s ease,
    border-color 0.25s ease,
    background 0.25s ease;
}

.certificate-card::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -100px;
  width: 220px;
  height: 220px;
  border: 1px solid var(--border);
  border-radius: 50%;
  opacity: 0.5;
  pointer-events: none;
}

.certificate-card:hover {
  transform: translateY(-5px);
  border-color: #3a434e;
  background:
    linear-gradient(
      145deg,
      var(--surface-hover),
      #10151a
    );
}

.certificate-top {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.certificate-status {
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.certificate-icon {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 58px;
  height: 58px;
  margin-top: 38px;
  border: 1px solid var(--border);
  border-radius: 16px;
  color: var(--accent);
  font-size: 25px;
}

.certificate-content {
  position: relative;
  z-index: 1;
}

.certificate-type {
  margin: 26px 0 8px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.certificate-card h3 {
  margin: 0;
  font-size: 27px;
  line-height: 1.15;
  letter-spacing: -0.035em;
}

.certificate-description {
  max-width: 520px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.certificate-details {
  display: flex;
  gap: 45px;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.certificate-details div {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.certificate-details span {
  color: var(--muted);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.13em;
}

.certificate-details strong {
  font-size: 13px;
  font-weight: 600;
}

.certificate-link {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: auto;
  padding-top: 25px;
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  border-top: 1px solid var(--border);
}

.certificate-link span {
  color: var(--muted);
  font-size: 18px;
  transition: transform 0.2s ease;
}

.certificate-link:hover span {
  transform: translate(3px, -3px);
}

.certificate-link-disabled {
  color: var(--muted);
}

.certificate-link-disabled:hover span {
  transform: none;
}

.certificate-summary {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 50px;
  padding: 42px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.certificate-summary h2 {
  margin: 15px 0 0;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.045em;
}

.certificate-summary > p {
  max-width: 360px;
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

@media (max-width: 800px) {
  .certificate-grid {
    grid-template-columns: 1fr;
  }

  .certificate-summary {
    align-items: flex-start;
    flex-direction: column;
    padding: 30px;
  }
}

@media (max-width: 600px) {
  .certificate-card {
    min-height: 400px;
    padding: 25px;
  }

  .certificate-details {
    gap: 25px;
  }

  .certificate-summary h2 {
    font-size: 30px;
  }
}