:root {
  --primary-color: #069ec6;
  --primary-dark: #057fa0;
  --text-color: #1f2937;
  --muted-color: #5f6b7a;
  --background-color: #f5f7fa;
  --surface-color: #ffffff;
  --border-color: #dce3ea;
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--background-color);
  color: var(--text-color);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
}

a {
  color: var(--primary-color);
  text-decoration: none;
}

a:hover {
  color: var(--primary-dark);
}

/* Header dan navigasi */

.site-header,
body > header {
  position: sticky;
  top: 0;
  z-index: 10;
  background-color: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--border-color);
}

.navbar,
body > header nav {
  width: min(100% - 40px, var(--max-width));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  color: var(--text-color);
  font-size: 20px;
  font-weight: 700;
}

.nav-links,
body > header nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-links a,
body > header nav a {
  color: var(--text-color);
  font-weight: 600;
}

.nav-links a:hover,
body > header nav a:hover {
  color: var(--primary-color);
}

/* Konten utama */

main {
  width: 100%;
}

.hero {
  width: min(100% - 40px, var(--max-width));
  margin: 0 auto;
  padding: 112px 0 96px;
  text-align: center;
}

.eyebrow,
.section-label {
  margin-bottom: 12px;
  color: var(--primary-color);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 850px;
  margin: 0 auto 24px;
  font-size: clamp(40px, 6vw, 68px);
  line-height: 1.1;
}

.hero-description {
  max-width: 720px;
  margin: 0 auto;
  color: var(--muted-color);
  font-size: 20px;
}

.hero-actions {
  margin-top: 36px;
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.primary-button,
.secondary-button {
  display: inline-block;
  min-width: 160px;
  padding: 13px 22px;
  border-radius: 10px;
  font-weight: 700;
  text-align: center;
}

.primary-button {
  background-color: var(--primary-color);
  color: #ffffff;
}

.primary-button:hover {
  background-color: var(--primary-dark);
  color: #ffffff;
}

.secondary-button {
  background-color: var(--surface-color);
  color: var(--text-color);
  border: 1px solid var(--border-color);
}

.secondary-button:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

/* Section umum */

.services-section,
.about-preview,
.javascript-demo,
.contact-section {
  width: min(100% - 40px, var(--max-width));
  margin: 0 auto;
  padding: 80px 0;
}

.services-section,
.javascript-demo,
.contact-section {
  text-align: center;
}

.services-section h2,
.about-preview h2,
.javascript-demo h2,
.contact-section h2 {
  margin: 0 0 20px;
  font-size: clamp(30px, 4vw, 42px);
  line-height: 1.2;
}

/* Card layanan */

.services-grid {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  padding: 32px;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  text-align: left;
}

.service-card h3 {
  margin: 0 0 12px;
  font-size: 22px;
}

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

/* Tentang saya */

.about-preview {
  display: flex;
  align-items: center;
}

.about-preview > div {
  max-width: 760px;
  padding: 48px;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 18px;
}

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

/* Demo JavaScript */

.javascript-demo {
  max-width: 760px;
}

.javascript-demo button {
  margin-top: 12px;
  padding: 13px 24px;
  border: none;
  border-radius: 10px;
  background-color: var(--primary-color);
  color: #ffffff;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
}

.javascript-demo button:hover {
  background-color: var(--primary-dark);
}

#message {
  min-height: 28px;
  margin-top: 18px;
  font-weight: 600;
}

/* Kontak */

.contact-section {
  margin-bottom: 80px;
  padding: 56px 24px;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 18px;
}

.contact-section p {
  max-width: 680px;
  margin-right: auto;
  margin-left: auto;
  color: var(--muted-color);
}

/* Halaman Tentang Saya */

main > section:not([class]) {
  width: min(100% - 40px, 820px);
  margin: 72px auto;
  padding: 48px;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 18px;
}

main > section:not([class]) h1 {
  margin-top: 0;
  color: var(--primary-color);
  font-size: clamp(36px, 5vw, 52px);
}

main > section:not([class]) p {
  color: var(--muted-color);
}

/* Footer */

.site-footer,
body > footer {
  padding: 28px 20px;
  background-color: #17212b;
  color: #ffffff;
  text-align: center;
}

.site-footer p,
body > footer p {
  margin: 0;
}

/* Tampilan tablet dan mobile */

@media (max-width: 768px) {
  .navbar,
  body > header nav {
    padding: 18px 0;
    flex-direction: column;
  }

  .nav-links,
  body > header nav {
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero {
    padding: 72px 0 64px;
  }

  .hero h1 {
    font-size: 42px;
  }

  .hero-description {
    font-size: 18px;
  }

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

  .service-card {
    text-align: center;
  }

  .about-preview > div,
  main > section:not([class]) {
    padding: 32px 24px;
  }

  .services-section,
  .about-preview,
  .javascript-demo,
  .contact-section {
    padding-top: 60px;
    padding-bottom: 60px;
  }
}

/* Form lead */

.contact-description {
  max-width: 680px;
  margin: 0 auto 36px;
  color: var(--muted-color);
}

.lead-form {
  max-width: 820px;
  margin: 40px auto 0;
  text-align: left;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-color);
  font-size: 15px;
  font-weight: 700;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  background-color: #ffffff;
  color: var(--text-color);
  font: inherit;
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #9199a5;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary-color);
  outline: none;
  box-shadow: 0 0 0 3px rgba(6, 158, 198, 0.14);
}

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

.consent-group {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin: 4px 0 28px;
}

.consent-group input {
  width: 18px;
  height: 18px;
  margin-top: 3px;
  accent-color: var(--primary-color);
  flex-shrink: 0;
}

.consent-group label {
  color: var(--muted-color);
  font-size: 14px;
  line-height: 1.6;
}

.submit-button {
  width: 100%;
  padding: 15px 24px;
  border: none;
  border-radius: 10px;
  background-color: var(--primary-color);
  color: #ffffff;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition:
    background-color 0.2s ease,
    transform 0.2s ease;
}

.submit-button:hover {
  background-color: var(--primary-dark);
  transform: translateY(-1px);
}

.submit-button:disabled {
  background-color: #9aa5af;
  cursor: not-allowed;
  transform: none;
}

.form-status {
  min-height: 24px;
  margin: 18px 0 0;
  text-align: center;
  font-size: 15px;
  font-weight: 600;
}

.form-status.success {
  color: #08783e;
}

.form-status.error {
  color: #c62828;
}

/* Form versi mobile */

@media (max-width: 768px) {
  .form-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .lead-form {
    margin-top: 32px;
  }

  .contact-section {
    padding-right: 20px;
    padding-left: 20px;
  }

  .contact-section h2 {
    font-size: 30px;
  }
}