:root {
  --color-header-color: #e3f1fc;
  --color-header-background: #00616e;
  --color-header-highlight: #ffffff;
  --color-content-color: #45474d;
  --color-content-background: #e5e8ee;
  --color-content-highlight: #ffffff;
  --color-scenery: #bec5d7;
  --font-family: 'Overpass', 'Open Sans', ui-sans-serif, system-ui, sans-serif;
}

html.dark {
  --color-header-color: #f4fcfe;
  --color-header-background: #00616e;
  --color-header-highlight: #dd9023;
  --color-content-color: #edeef1;
  --color-content-background: #81879c;
  --color-content-highlight: #dd9023;
  --color-scenery: #474d60;
}

* {
  transition-property: color, background-color, border-color;
  transition-duration: 200ms;
  transition-timing-function: ease-in-out;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  color: var(--color-content-color);
  background-color: var(--color-scenery);
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

h1, h2, h3, h4 {
  color: var(--color-content-color);
  margin-top: 0;
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  z-index: 10;
  background-color: var(--color-header-background);
  color: var(--color-header-color);
  padding: 1rem 0.5rem;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.header-branding {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.site-title {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--color-header-color);
  white-space: nowrap;
}

.menu-toggle,
.theme-toggle {
  background: none;
  border: none;
  color: var(--color-header-color);
  cursor: pointer;
  font-size: 1.5rem;
  padding: 0.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle i {
  font-size: 1.25rem;
}

.main-nav {
  width: 100%;
  display: none;
  margin-top: 0.5rem;
}

.main-nav.open {
  display: block;
}

.nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.nav-link {
  color: var(--color-header-color);
  font-size: 1rem;
  padding: 0.25rem 0;
  display: inline-block;
}

.nav-link.active {
  color: var(--color-header-highlight);
  font-weight: bold;
}

.desktop-only {
  display: none;
}

/* Main */
.site-main {
  max-width: 1200px;
  margin: 0 auto;
  background-color: var(--color-scenery);
}

.section {
  min-height: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 4px solid var(--color-scenery);
  background-color: var(--color-content-background);
}

.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem 1rem;
}

/* About */
.about-grid {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.about-profile {
  text-align: center;
  width: 100%;
  margin-bottom: 1.5rem;
}

.profile-img {
  width: 50%;
  max-width: 200px;
  height: auto;
  border-radius: 0.5rem;
}

.profile-name {
  font-size: 1.25rem;
  font-weight: 500;
  margin-top: 1rem;
  margin-bottom: 0.25rem;
}

.profile-role {
  font-size: 0.875rem;
  margin: 0;
}

.about-bio {
  width: 100%;
  padding-top: 1rem;
  border-top: 1px solid var(--color-content-color);
}

.about-bio p {
  font-size: 0.75rem;
  line-height: 1.625;
  margin-bottom: 1rem;
}

.about-bio p:last-child {
  margin-bottom: 0;
}

.section-experiences .section-header h2 {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.section-experiences .section-header h2 i {
  font-size: 1rem;
  color: var(--color-content-highlight);
}

.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 0 0 2.5rem;
}

.timeline-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 1.75rem;
  width: 3px;
  background-color: var(--color-content-highlight);
  border-radius: 3px;
}

.timeline-item {
  position: relative;
  display: flex;
  align-items: center;
  margin-bottom: 2rem;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: -2.125rem;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background-color: var(--color-content-highlight);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--color-header-background);
  box-shadow: 0 0 0 4px var(--color-content-background);
  z-index: 2;
  flex-shrink: 0;
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.timeline-item:hover .timeline-marker {
  transform: scale(1.15);
  box-shadow: 0 0 0 6px var(--color-content-background);
}

.timeline-card {
  position: relative;
  flex: 1;
  background-color: var(--color-content-highlight);
  border-radius: 0.5rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08), 0 1px 3px rgba(0, 0, 0, 0.06);
  transition: transform 250ms cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 250ms cubic-bezier(0.22, 1, 0.36, 1);
}

.timeline-item:hover .timeline-card {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(0, 0, 0, 0.08);
}

html.dark .timeline-card {
  background-color: var(--color-scenery);
}

.timeline-arrow {
  position: absolute;
  top: 50%;
  left: -8px;
  width: 0;
  height: 0;
  margin-top: -8px;
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
  border-right: 8px solid var(--color-content-highlight);
  transition: border-right-color 200ms ease;
}

html.dark .timeline-arrow {
  border-right-color: var(--color-scenery);
}

.timeline-content {
  padding: 1rem 1.25rem;
}

.timeline-content h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0 0 0.25rem;
  line-height: 1.3;
  color: var(--color-content-color);
}

.timeline-date {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-header-background);
  background-color: var(--color-scenery);
  padding: 0.15rem 0.6rem;
  border-radius: 9999px;
  margin-bottom: 0.5rem;
}

.timeline-content p {
  font-size: 0.85rem;
  line-height: 1.6;
  margin: 0 0 0.4rem;
  color: var(--color-content-color);
}

.timeline-content p:last-child {
  margin-bottom: 0;
}

.timeline-content a {
  color: var(--color-header-background);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: opacity 200ms ease;
}

.timeline-content a:hover {
  opacity: 0.7;
}

html.dark .timeline-marker {
  color: var(--color-header-background);
}

html.dark .timeline-date {
  color: var(--color-content-color);
  background-color: var(--color-header-background);
}

html.dark .timeline-content a {
  color: var(--color-content-highlight);
}

.section-header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.section-header h2 {
  font-size: 1.125rem;
  font-weight: 500;
}

.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  max-width: 1100px;
  margin: 0 auto;
}

.project-card {
  position: relative;
  border-radius: 0.75rem;
  overflow: hidden;
  background-color: var(--color-scenery);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  transition: transform 250ms cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 250ms cubic-bezier(0.22, 1, 0.36, 1);
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
}

.project-card-inner {
  position: relative;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-height: 240px;
  z-index: 1;
}

.project-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}

.project-icon {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: #ffffff;
  flex-shrink: 0;
}

.project-icon-fact { background-color: #00616e; }
.project-icon-infra { background-color: #dd9023; }
.project-icon-erp { background-color: #45474d; }
.project-icon-systec { background-color: #6c757d; }
.project-icon-auth { background-color: #198754; }
.project-icon-audit { background-color: #0d6efd; }

.project-status {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--color-content-color);
  opacity: 0.6;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.project-card-body {
  flex: 1;
}

.project-category {
  display: block;
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--color-content-color);
  opacity: 0.55;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.35rem;
}

.project-card-body h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  line-height: 1.3;
  color: var(--color-content-color);
}

.project-card-body p {
  font-size: 0.85rem;
  line-height: 1.55;
  margin: 0;
  color: var(--color-content-color);
  opacity: 0.85;
}

.project-card-footer {
  display: flex;
  gap: 0.5rem;
}

.project-card-footer a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.5rem;
  background-color: var(--color-content-background);
  color: var(--color-content-color);
  font-size: 1rem;
  transition: background-color 200ms ease, color 200ms ease, transform 200ms ease;
}

.project-card-footer a:hover {
  background-color: var(--color-header-background);
  color: var(--color-header-color);
  transform: scale(1.08);
}

.project-decoration {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 140px;
  height: 140px;
  opacity: 0.1;
  pointer-events: none;
  z-index: 0;
}

.decoration-waves {
  background: radial-gradient(circle at 100% 100%, var(--color-header-background) 0%, transparent 60%);
}

.decoration-dots {
  background: radial-gradient(circle, var(--color-header-background) 1.5px, transparent 2px);
  background-size: 10px 10px;
}

.decoration-lines {
  background: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 4px,
    var(--color-header-background) 4px,
    var(--color-header-background) 5px
  );
  clip-path: circle(70% at 100% 100%);
}

.decoration-circles {
  background: radial-gradient(circle at 100% 100%, var(--color-header-background) 0%, transparent 50%);
}

.decoration-grid {
  background-image:
    linear-gradient(var(--color-header-background) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-header-background) 1px, transparent 1px);
  background-size: 14px 14px;
  opacity: 0.06;
}

.decoration-zigzag {
  background:
    linear-gradient(135deg, var(--color-header-background) 20%, transparent 20%) -8px 0,
    linear-gradient(225deg, var(--color-header-background) 20%, transparent 20%) -8px 0;
  background-size: 16px 16px;
  opacity: 0.08;
}

/* Contact */
.contact-header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.contact-header h2 {
  font-size: 1.125rem;
  font-weight: 500;
  margin-bottom: 1rem;
}

.contact-header p {
  font-size: 0.875rem;
  line-height: 1.625;
  max-width: 600px;
  margin: 0 auto;
}

.contact-form {
  max-width: 600px;
  margin: 0 auto 1.5rem;
}

.contact-form iframe {
  display: block;
  width: 100%;
  border: none;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.social-links a {
  font-size: 1.5rem;
  color: var(--color-content-color);
  transition: opacity 200ms ease;
}

.social-links a:hover {
  opacity: 0.7;
}

/* Responsive */
@media (min-width: 768px) {
  .site-header {
    padding: 1.5rem 6rem;
  }

  .header-inner {
    flex-direction: row;
    justify-content: space-between;
  }

  .header-branding {
    width: auto;
    justify-content: flex-start;
    gap: 1rem;
  }

  .site-title {
    font-size: 1.5rem;
  }

  .menu-toggle {
    display: none;
  }

  .mobile-only {
    display: none;
  }

  .desktop-only {
    display: flex;
  }

  .main-nav {
    display: block;
    width: auto;
    margin-top: 0;
  }

  .nav-list {
    flex-direction: row;
    gap: 1.5rem;
  }

  .nav-link {
    font-size: 1.125rem;
  }

  .container {
    padding: 5rem 1.5rem;
  }

  .section-about .container,
  .section-projects .container {
    padding-top: 2.5rem;
  }

  .section {
    min-height: 100vh;
  }

  .about-grid {
    flex-direction: row;
    align-items: center;
    margin: 0 2rem;
  }

  .about-profile {
    width: 33.333%;
    margin-bottom: 0;
  }

  .profile-img {
    width: auto;
    max-width: 100%;
  }

  .about-bio {
    width: 66.667%;
    padding-top: 0;
    padding-left: 2rem;
    border-top: none;
    border-left: 1px solid var(--color-content-color);
  }

  .about-bio p {
    font-size: 1rem;
  }

  .section-experiences .section-header h2 {
    font-size: 1.25rem;
  }

  .timeline {
    padding: 0;
  }

  .timeline-line {
    left: 50%;
    transform: translateX(-50%);
  }

  .timeline-item {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-bottom: 3rem;
  }

  .timeline-left {
    flex-direction: row-reverse;
  }

  .timeline-right {
    flex-direction: row;
  }

  .timeline-marker {
    position: relative;
    left: auto;
    width: 3rem;
    height: 3rem;
    font-size: 1.25rem;
    box-shadow: 0 0 0 5px var(--color-content-background);
  }

  .timeline-item:hover .timeline-marker {
    box-shadow: 0 0 0 8px var(--color-content-background);
  }

  .timeline-card {
    width: calc(50% - 2.5rem);
  }

  .timeline-left .timeline-card {
    margin-right: auto;
  }

  .timeline-right .timeline-card {
    margin-left: auto;
  }

  .timeline-left .timeline-arrow {
    left: auto;
    right: -8px;
    border-right: none;
    border-left: 8px solid var(--color-content-highlight);
  }

  html.dark .timeline-left .timeline-arrow {
    border-left-color: var(--color-scenery);
  }

  .timeline-right .timeline-arrow {
    left: -8px;
    right: auto;
    border-left: none;
    border-right: 8px solid var(--color-content-highlight);
  }

  html.dark .timeline-right .timeline-arrow {
    border-right-color: var(--color-scenery);
  }

  .timeline-content {
    padding: 1.25rem 1.5rem;
  }

  .timeline-content h3 {
    font-size: 1.05rem;
  }

  .timeline-date {
    font-size: 0.8rem;
    padding: 0.2rem 0.7rem;
  }

  .timeline-content p {
    font-size: 0.9rem;
  }

  .section-header h2,
  .contact-header h2 {
    font-size: 1.25rem;
  }

  .contact-header p {
    font-size: 1rem;
  }

  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .site-title {
    font-size: 1.875rem;
  }

  .nav-link {
    font-size: 1.25rem;
  }

  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}