:root {
  --navy: #000080;
  --navy-light: #1a1a9e;
  --navy-glow: rgba(0, 0, 128, 0.45);
  --accent-soft: #4d4dff;
  --negro: #0d0d12;
  --negro-suave: #16161f;
  --card: #1c1c28;
  --card-border: rgba(77, 77, 255, 0.15);
  --text: #e8e8f0;
  --text-muted: #a8a8bc;
  --white: #ffffff;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --header-h: 72px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
  background: var(--negro);
  color: var(--text);
  min-height: 100vh;
  padding-top: var(--header-h);
  line-height: 1.6;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--navy-glow), transparent),
    radial-gradient(ellipse 60% 40% at 100% 50%, rgba(0, 0, 128, 0.12), transparent),
    radial-gradient(ellipse 50% 30% at 0% 80%, rgba(0, 0, 128, 0.08), transparent);
  pointer-events: none;
  z-index: -1;
}

.text-accent,
.about-highlight {
  color: var(--accent-soft);
  font-weight: 600;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(13, 13, 18, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
  transition: box-shadow var(--transition), background var(--transition);
}

.site-header.scrolled {
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

.nav {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
}

.logo {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--white);
  text-decoration: none;
  letter-spacing: -0.02em;
  transition: color var(--transition);
}

.logo:hover {
  color: var(--accent-soft);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.75rem;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  transition: color var(--transition);
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--navy);
  transition: width var(--transition);
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--white);
}

.nav-links a:hover::after,
.nav-links a:focus-visible::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Layout */
main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 1.25rem 3rem;
}

.section {
  margin-bottom: 4.5rem;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: clamp(1.6rem, 4vw, 2rem);
  font-weight: 700;
  color: var(--white);
  margin-bottom: 2rem;
  letter-spacing: -0.02em;
}

.section-icon {
  color: var(--navy);
  filter: drop-shadow(0 0 8px var(--navy-glow));
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.25rem;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition), color var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--navy);
  color: var(--white);
  border: 2px solid var(--navy);
  box-shadow: 0 4px 16px var(--navy-glow);
}

.btn-primary:hover {
  background: var(--navy-light);
  border-color: var(--navy-light);
  box-shadow: 0 6px 24px var(--navy-glow);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 2px solid var(--card-border);
}

.btn-outline:hover {
  border-color: var(--navy);
  color: var(--white);
  background: rgba(0, 0, 128, 0.15);
}

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.75rem;
  box-shadow: var(--shadow);
  transition: border-color var(--transition), transform var(--transition);
}

.card:hover {
  border-color: rgba(77, 77, 255, 0.35);
}

/* Hero */
.about {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--header-h) - 2rem);
  margin-bottom: 2rem;
  padding: 2rem 0;
}

.about-container {
  display: flex;
  align-items: center;
  gap: 3rem;
  width: 100%;
}

.avatar-ring {
  position: relative;
  border-radius: 20px;
  padding: 4px;
  background: linear-gradient(135deg, var(--navy), var(--accent-soft), var(--navy));
  animation: ringPulse 4s ease-in-out infinite;
}

@keyframes ringPulse {
  0%, 100% { box-shadow: 0 0 20px var(--navy-glow); }
  50% { box-shadow: 0 0 36px rgba(77, 77, 255, 0.5); }
}

.avatar-ring img {
  display: block;
  width: min(280px, 70vw);
  height: auto;
  border-radius: 16px;
  object-fit: cover;
  animation: floatAvatar 6s ease-in-out infinite;
}

@keyframes floatAvatar {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.about-content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  flex: 1;
}

.about-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  width: fit-content;
  background: rgba(0, 0, 128, 0.25);
  color: var(--accent-soft);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.35rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--card-border);
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  animation: pulseDot 2s ease-in-out infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}

.about-content h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.about-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 540px;
}

.about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

/* Experience timeline */
.timeline {
  position: relative;
  margin-left: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--navy), transparent);
  opacity: 0.6;
}

.timeline-item {
  position: relative;
  padding-left: 2rem;
}

.timeline-marker {
  position: absolute;
  left: -5px;
  top: 1.25rem;
  width: 12px;
  height: 12px;
  background: var(--navy);
  border-radius: 50%;
  border: 3px solid var(--negro);
  box-shadow: 0 0 12px var(--navy-glow);
  z-index: 1;
}

.timeline-title {
  color: var(--white);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.15rem;
}

.timeline-company {
  color: var(--accent-soft);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0.75rem;
}

.timeline-subrole {
  margin: 1rem 0 0.5rem;
}

.timeline-subrole h4 {
  color: var(--white);
  font-size: 1.05rem;
  font-weight: 600;
}

.timeline-date {
  display: inline-block;
  margin-top: 0.25rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  background: rgba(0, 0, 128, 0.2);
  padding: 0.2rem 0.65rem;
  border-radius: 6px;
}

.timeline-body {
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.65;
}

.timeline-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.timeline-list li {
  position: relative;
  padding-left: 1.25rem;
  color: var(--text-muted);
  font-size: 0.98rem;
}

.timeline-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background: var(--navy);
  border-radius: 50%;
}

/* Projects */
.project-list {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.project-card {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) 1fr;
  align-items: stretch;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow), 0 0 0 1px rgba(77, 77, 255, 0.2);
  border-color: rgba(77, 77, 255, 0.3);
}

.project-img {
  position: relative;
  margin: 0;
  padding: 0;
  min-height: 220px;
  overflow: hidden;
  background: var(--negro-suave);
  align-self: stretch;
}

.project-img img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  border: none;
  object-fit: cover;
  object-position: top center;
  transition: transform 0.5s ease;
}

.project-card:hover .project-img img {
  transform: scale(1.03);
}

.project-img--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(145deg, rgba(0, 0, 128, 0.35), var(--negro-suave));
  position: relative;
}

.project-img--placeholder::after {
  content: attr(data-label);
  position: absolute;
  bottom: 1rem;
  left: 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.project-placeholder-icon {
  font-size: 3rem;
  opacity: 0.5;
}

.project-info {
  padding: 1.5rem 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.75rem;
}

.project-info h3 {
  color: var(--white);
  font-size: 1.25rem;
  font-weight: 700;
}

.project-info p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.project-links {
  margin-top: 0.25rem;
}

/* Tools */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.tools-category {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
  transition: transform var(--transition), border-color var(--transition);
}

.tools-category:hover {
  transform: translateY(-3px);
  border-color: rgba(77, 77, 255, 0.3);
}

.tools-category--wide {
  grid-column: 1 / -1;
}

.tools-category h3 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent-soft);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.85rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--card-border);
}

.tools-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tools-tags li {
  font-size: 0.875rem;
  color: var(--text);
  background: rgba(0, 0, 128, 0.2);
  border: 1px solid var(--card-border);
  padding: 0.35rem 0.75rem;
  border-radius: 8px;
  transition: background var(--transition), transform var(--transition);
}

.tools-tags li:hover {
  background: rgba(0, 0, 128, 0.4);
  transform: scale(1.04);
}

/* About me */
.aboutme-text {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  width: 100%;
  max-width: none;
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Contact */
.contact .section-title {
  margin-bottom: 1.75rem;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 2.5rem;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 2rem 2.25rem;
}

.contact-copy {
  text-align: left;
}

.contact-text {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin: 0;
}

.contact-channels {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  flex-shrink: 0;
}

.contact-icon {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  min-width: 160px;
  padding: 0.85rem 1.15rem;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 600;
  transition: transform var(--transition), background var(--transition), border-color var(--transition), color var(--transition);
}

.contact-icon svg {
  color: var(--accent-soft);
  transition: transform var(--transition), color var(--transition);
}

.contact-icon:hover {
  transform: translateY(-6px) scale(1.03);
  background: rgba(0, 0, 128, 0.25);
  border-color: var(--navy);
  color: var(--white);
}

.contact-icon:hover svg {
  color: var(--white);
  transform: scale(1.1);
}

/* Scroll reveal animations */
.reveal,
.reveal-child {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
    transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
  transition-delay: var(--delay, 0s);
}

.reveal.visible,
.reveal-child.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Footer */
footer {
  background: var(--negro-suave);
  border-top: 1px solid var(--card-border);
  color: var(--text-muted);
  text-align: center;
  padding: 1.25rem;
  font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(13, 13, 18, 0.98);
    backdrop-filter: blur(12px);
    padding: 1rem 0;
    border-bottom: 1px solid var(--card-border);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-links li {
    border-bottom: 1px solid var(--card-border);
  }

  .nav-links a {
    display: block;
    padding: 1rem 1.5rem;
  }

  .about-container {
    flex-direction: column;
    text-align: center;
    gap: 2rem;
  }

  .about-badge,
  .about-links {
    margin-left: auto;
    margin-right: auto;
  }

  .about-desc {
    margin: 0 auto;
  }

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

  .project-img {
    min-height: 200px;
    aspect-ratio: 16 / 10;
  }

  .project-img img {
    min-height: 100%;
  }

  .timeline {
    margin-left: 0.75rem;
  }

  .tools-category--wide {
    grid-column: auto;
  }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: 1.75rem;
    padding: 1.5rem;
  }

  .contact-copy {
    text-align: center;
  }

  .contact-channels {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
  }

  .contact-icon {
    width: calc(50% - 0.375rem);
    min-width: 140px;
  }
}

@media (max-width: 480px) {
  .contact-channels {
    flex-direction: column;
    align-items: stretch;
  }

  .contact-icon {
    width: 100%;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal,
  .reveal-child {
    opacity: 1;
    transform: none;
  }
}