:root {
  --bg: #0f172a;
  --card: #0b1220;
  --muted: #94a3b8;
  --accent: #0ea5a4;
  --glass: rgba(255, 255, 255, 0.04);
  --radius: 12px;
  --gap: 24px;
  --maxw: 1280px;
  --ff: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
    Arial;
  --dur: 320ms;
  --ease: cubic-bezier(0.2, 0.9, 0.2, 1);
}
* {
  box-sizing: border-box;
}
html,
body {
  height: 100%;
}
body {
  margin: 0;
  font-family: var(--ff);
  color: #e6eef6;
  /** background: linear-gradient(180deg, #071029 0%, #071a2a 100%); **/
  background: linear-gradient(90deg, #071029 0%, #071a2a 100%);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.45;
  -webkit-tap-highlight-color: transparent;
}
.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 40px 20px;
}
header {
  position: sticky;
  top: 16px;
  z-index: 60;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 10px;
  border-radius: 15px;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(10px);
  box-shadow: rgba(3, 3, 3, 0.5) 0px 4px 20px;
}
.brand {
  font-weight: 700;
  letter-spacing: 0.2px;
}
nav {
  display: flex;
  gap: 14px;
  align-items: center;
}
nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
}
.btn {
  background: var(--accent);
  color: #042026;
  padding: 10px 14px;
  border-radius: 10px;
  font-weight: 600;
  border: none;
  cursor: pointer;
}
.hero {
  /** display: grid;
        grid-template-columns: 1fr 520px; **/
  gap: 32px;
  /** align-items: center; **/
  margin-top: 28px;
  width: 100%;
  display: flex;
  flex-direction: row;
  height: 300px;
  align-items: stretch;
}
.hero h1 {
  font-size: 34px;
  margin: 0 0 8px;
}
.hero p.lead {
  margin: 0 0 18px;
  color: var(--muted);
}
.cta-row {
  display: flex;
  gap: 12px;
}
.card-hero {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent);
  padding: 24px;
  border-radius: var(--radius);
  box-shadow: 0 8px 28px rgba(2, 6, 23, 0.6);
  width: 65%;
}

.card-hero ul li {
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-top: 0;
  border-bottom: 0;
  padding: 4px 8px;
  border-radius: 5px;
}

/* hero canvas */
.hero-canvas {
  position: relative;
  /** height: 360px; **/
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(
    180deg,
    rgba(14, 165, 164, 0.05),
    rgba(2, 6, 23, 0.2)
  );
  width: 35%;
}
canvas#particles {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.code-typed {
  position: absolute;
  right: 20px;
  bottom: 18px;
  left: 20px;
  background: rgba(2, 6, 23, 0.4);
  padding: 12px;
  border-radius: 8px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, "Roboto Mono";
  font-size: 13px;
  color: #a7f0ec;
}

/* sections */
section {
  margin-top: 56px;
}
h2.section-title {
  font-size: 20px;
  margin: 0 0 18px;
}

/* skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.skill-card {
  background: var(--card);
  padding: 18px;
  border-radius: 12px;
}
.skill-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}
.skill-list {
  margin-top: 12px;
  color: var(--muted);
  font-size: 14px;
}

/* timeline */
.timeline {
  position: relative;
  padding-left: 28px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), transparent);
}
.entry {
  position: relative;
  margin-bottom: 28px;
  padding: 12px 18px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.01), transparent);
  border-radius: 10px;
}
.entry::before {
  content: "";
  position: absolute;
  left: -18px;
  top: 18px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px rgba(14, 165, 164, 0.25);
}
.entry h3 {
  margin: 0 0 6px;
  font-size: 15px;
}
.entry p.small {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}
.bullets {
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
}

/* projects */
.project-link-btn {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--accent);
  font-weight: 500;
  cursor: pointer;
}
.projects-filters {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.filter-btn {
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--muted);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  transition: all var(--dur) var(--ease);
  font-family: var(--ff);
}
.filter-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}
.filter-btn.active {
  background: rgba(14, 165, 164, 0.1);
  border-color: var(--accent);
  color: var(--accent);
}
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.proj {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  min-height: 240px;
  background-size: cover;
  background-position: center;
  cursor: pointer;
  transition: transform 350ms var(--ease), box-shadow 350ms var(--ease),
    opacity 300ms var(--ease);
  opacity: 1;
  transform: scale(1);
}
/* reemplazar la regla .proj.hidden actual */
.proj.hidden {
  /* Eliminar del layout para que el grid se reordene sin huecos */
  display: none !important;
  opacity: 0;
  transform: scale(0.95);
  pointer-events: none;
  /* limpiar propiedades que ya no necesitamos */
  height: auto;
  min-height: auto;
  margin: 0;
  overflow: hidden;
}
.proj::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    transparent 40%,
    rgba(2, 6, 23, 0.4) 100%
  );
  transition: opacity var(--dur) var(--ease);
}
.proj:hover {
  transform: scale(1.015);
  box-shadow: 0 12px 32px rgba(2, 6, 23, 0.5);
}
.proj:hover::after {
  background: linear-gradient(
    180deg,
    transparent 30%,
    rgba(2, 6, 23, 0.6) 100%
  );
}
.proj .meta {
  position: absolute;
  left: 18px;
  bottom: 18px;
  right: 18px;
  color: #fff;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 350ms var(--ease), transform 350ms var(--ease);
  z-index: 2;
}
.proj:hover .meta {
  opacity: 1;
  transform: translateY(0);
}
.proj .meta strong {
  display: block;
  font-size: 16px;
  margin-bottom: 8px;
  font-weight: 600;
}
.proj .category-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  background: rgba(2, 6, 23, 0.7);
  backdrop-filter: blur(8px);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--accent);
  z-index: 2;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 350ms var(--ease), transform 350ms var(--ease);
}
.proj:hover .category-badge {
  opacity: 1;
  transform: translateY(0);
}
.chips {
  display: flex;
  gap: 8px;
  margin-top: 8px;
  flex-wrap: wrap;
}
.chip {
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(4px);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 500;
}

/* process */
.process {
  display: flex;
  gap: 12px;
}
.step {
  flex: 1;
  background: var(--card);
  padding: 18px;
  border-radius: 10px;
  transition: transform var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}
.step .num {
  font-weight: 700;
  color: var(--accent);
}

/* footer cta */
.cta-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: linear-gradient(
    180deg,
    rgba(14, 165, 164, 0.06),
    rgba(2, 6, 23, 0.1)
  );
  padding: 22px;
  border-radius: 12px;
}
header nav #downloadCv {
  display: none;
}
#sobre {
  margin-top: 90px;
}

.cta-footer .col-1-f {
  width: 55%;
}

/* skills microinteractions */
.skill-card {
  transition: transform var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
  transform-style: preserve-3d;
}
.skill-card:hover,
.skill-card:focus {
  transform: translateY(-2px) rotateX(2deg) rotateY(1deg);
  box-shadow: 0 10px 28px rgba(2, 6, 23, 0.45);
}

/* timeline progress */
.timeline {
  position: relative;
  padding-left: 28px;
  --tl-progress: 0;
}
.timeline::after {
  content: "";
  position: absolute;
  left: 8px;
  top: 0;
  width: 2px;
  height: 100%;
  background: var(--accent);
  transform: scaleY(var(--tl-progress));
  transform-origin: top;
  opacity: 0.7;
  filter: drop-shadow(0 0 6px rgba(14, 165, 164, 0.35));
}
.entry::before {
  transform: scale(0.85);
  opacity: 0.7;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.entry.seen::before {
  transform: scale(1);
  opacity: 1;
}

/* responsive */
@media (max-width: 980px) {
  .cta-footer .col-2-f {
    display: grid !important;
    grid-auto-columns: 2fr;
    width: 45%;
  }
  header {
    flex-direction: column;
    align-items: flex-start;
  }
  nav {
    flex-wrap: wrap;
    row-gap: 6px;
  }
  .hero {
    flex-direction: column;
    align-items: stretch;
    min-height: auto;
  }
  .card-hero,
  .hero-canvas {
    width: 100%;
  }
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 640px) {
  .container {
    padding: 20px 14px;
  }
  header {
    gap: 8px;
    position: static;
    top: auto;
  }
  .brand {
    font-size: 14px;
  }
  nav {
    justify-content: flex-start;
    overflow-x: auto;
  }
  nav a {
    font-size: 14px;
  }
  section {
    margin-top: 42px;
  }
  /* hero ajustes extra */
  .projects-grid {
    grid-template-columns: 1fr;
  }
  .skills-grid {
    grid-template-columns: 1fr;
  }
  .hero-canvas {
    /** height: 220px; **/
  }
  .card-hero {
    padding: 18px;
  }
  .hero h1 {
    font-size: 26px;
  }
  .cta-row {
    flex-wrap: wrap;
    gap: 10px;
  }
  #inicio .card-hero ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  /* SOBRE MÍ: apilar imagen y texto */
  #sobre > div {
    display: grid;
    grid-template-columns: 1fr !important;
    row-gap: 16px;
  }
  #sobre img {
    margin: 0 auto 8px;
  }
  #sobre p {
    font-size: 14px;
  }
  #sobre div[style*="display: flex"] {
    flex-wrap: wrap;
    row-gap: 8px;
  }
  /* PROYECTOS: filtros y chips más fluidos */
  .projects-filters {
    justify-content: flex-start;
  }
  .chips {
    gap: 6px;
  }
  .proj {
    min-height: 200px;
  }
  .projects-filters {
    gap: 8px;
  }
  .filter-btn {
    padding: 6px 12px;
    font-size: 13px;
  }
  #contacto .cta-footer {
    flex-direction: column !important;
  }
  .cta-footer .col-1-f {
    width: 100%;
    flex-direction: column;
  }
  .cta-footer .col-2-f {
    width: 100%;
  }
  #proceso .process {
    flex-direction: column !important;
  }
}

/* accessibility: focus */
:focus {
  outline: 2px solid rgba(14, 165, 164, 0.18);
  outline-offset: 3px;
}

/* reduced motion */
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
  }
}