/* ============================================================
   ALTAYR//_ — Tema IBM Quantum (Carbon Design System)
   Paleta: grises carbón + azul → púrpura → magenta
   Tipografía: IBM Plex Sans / IBM Plex Mono
   ============================================================ */

:root {
  /* Carbon grays */
  --bg:          #161616;
  --bg-deep:     #000000;
  --layer:       #262626;
  --layer-2:     #393939;
  --border:      #393939;
  --border-soft: #2a2a2a;

  /* Texto */
  --text:   #f4f4f4;
  --text-2: #c6c6c6;
  --text-3: #8d8d8d;

  /* Acentos IBM Quantum */
  --blue:       #4589ff;
  --blue-30:    #a6c8ff;
  --blue-strong:#0f62fe;
  --purple:     #a56eff;
  --pink:       #ee5396;
  --pink-soft:  #ff7eb6;
  --teal:       #08bdba;
  --green:      #42be65;

  --grad: linear-gradient(90deg, #4589ff 0%, #a56eff 50%, #ee5396 100%);
  --grad-text: linear-gradient(92deg, #78a9ff 0%, #a56eff 45%, #ff7eb6 100%);

  --sans: 'IBM Plex Sans', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, 'Cascadia Mono', 'JetBrains Mono', Consolas, monospace;

  --maxw: 1180px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --nav-h: 56px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: var(--blue-strong); color: #fff; }

.mono { font-family: var(--mono); }

a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

/* ============================================================
   NAV — barra Carbon de 56px
   ============================================================ */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--gutter);
  background: rgba(22, 22, 22, 0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  z-index: 100;
  transition: border-color 0.3s ease;
}
.nav.scrolled { border-bottom-color: var(--border); }

.nav-logo {
  font-family: var(--mono);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}
.nav-logo .accent { color: var(--blue); }

.nav-links { display: flex; gap: 2rem; }
.nav-links a {
  position: relative;
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-2);
  padding: 0.35rem 0;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--blue-30); border-bottom-color: var(--blue); }
.nav-links a.active { color: var(--text); }
.nav-links a.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -3px;
  height: 2px;
  background: var(--grad);
}

/* ============================================================
   HERO — agujero negro a pantalla completa
   ============================================================ */
.hero {
  position: relative;
  height: 100vh;
  height: 100svh;
  background: var(--bg-deep);
  overflow: hidden;
}

#blackhole {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

/* Fallback si WebGL no está disponible */
#blackhole.bh-fallback {
  background:
    radial-gradient(ellipse 42% 30% at 50% 46%, rgba(69,137,255,0.35), transparent 70%),
    radial-gradient(ellipse 60% 42% at 50% 46%, rgba(165,110,255,0.18), transparent 70%),
    radial-gradient(circle at 50% 46%, transparent 8%, rgba(238,83,150,0.12) 24%, transparent 55%),
    #000;
}

/* Telemetría estilo consola científica */
.hero-telemetry {
  position: absolute;
  top: calc(var(--nav-h) + 1.25rem);
  left: var(--gutter);
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  z-index: 3;
}
.hero-telemetry span { position: relative; padding-left: 1rem; }
.hero-telemetry span::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  width: 6px; height: 6px;
  transform: translateY(-50%);
  background: var(--blue);
}
.hero-telemetry span:nth-child(2)::before { background: var(--pink); }
.hero-telemetry sup { font-size: 0.85em; }

/* Contenido del hero — abajo a la izquierda, estilo IBM */
.hero-content {
  position: absolute;
  left: var(--gutter);
  bottom: clamp(4.5rem, 12vh, 8rem);
  z-index: 3;
}

.hero-kicker {
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--text-2);
  margin-bottom: 1rem;
}

.hero-title {
  font-family: var(--sans);
  font-weight: 300;
  font-size: clamp(3.8rem, 12vw, 9rem);
  line-height: 0.95;
  letter-spacing: -0.02em;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
/* Fallback si el navegador no soporta background-clip: text */
@supports not ((background-clip: text) or (-webkit-background-clip: text)) {
  .hero-title { color: var(--blue-30); }
}

.hero-tag {
  margin-top: 1.1rem;
  font-weight: 300;
  font-size: clamp(1rem, 2.2vw, 1.4rem);
  color: var(--text-2);
}

.hero-scroll {
  position: absolute;
  right: var(--gutter);
  bottom: 2rem;
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--text-3);
  z-index: 3;
  transition: color 0.2s ease;
}
.hero-scroll:hover { color: var(--blue-30); }
.hero-scroll .chev { display: inline-block; animation: bob 1.8s ease-in-out infinite; }
@keyframes bob { 0%,100% { transform: translateY(0); } 50% { transform: translateY(4px); } }

/* Degradado de unión hero → contenido */
.hero::after {
  content: '';
  position: absolute;
  inset: auto 0 0 0;
  height: 22vh;
  background: linear-gradient(180deg, transparent, var(--bg));
  pointer-events: none;
  z-index: 2;
}

/* ============================================================
   SECCIONES
   ============================================================ */
.section {
  padding: clamp(4.5rem, 10vh, 8rem) var(--gutter);
  border-top: 1px solid var(--border-soft);
}

.container { max-width: var(--maxw); margin: 0 auto; }

.section-label {
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 1.4rem;
}

.section-title {
  font-weight: 300;
  font-size: clamp(1.9rem, 4.5vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin-bottom: clamp(2rem, 5vh, 3.5rem);
  position: relative;
  padding-bottom: 1.2rem;
}
.section-title::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 72px; height: 2px;
  background: var(--grad);
}

/* ---------- 01 Sobre mí ---------- */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, 1fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
}

.about-text p { color: var(--text-2); margin-bottom: 1.2rem; max-width: 60ch; }
.about-text p:last-child { margin-bottom: 0; }
.about-text .section-title { color: var(--text); }

.data-panel {
  background: var(--layer);
  border: 1px solid var(--border);
  padding: 1.6rem 1.6rem 1.2rem;
}
.panel-title {
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--pink);
  margin-bottom: 1.1rem;
}
.data-panel dl div {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0.65rem 0;
  border-top: 1px solid var(--border-soft);
  font-size: 0.78rem;
}
.data-panel dt { color: var(--text-3); letter-spacing: 0.08em; }
.data-panel dd { color: var(--text); text-align: right; }

/* ---------- 02 Trayectoria ---------- */
.timeline { list-style: none; position: relative; margin-left: 4px; }
.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 6px; bottom: 6px;
  width: 1px;
  background: var(--layer-2);
}

.tl-item {
  position: relative;
  padding: 0 0 2.4rem 2.4rem;
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 1.2rem;
}
.tl-item:last-child { padding-bottom: 0; }

/* nodo cuadrado — estilo IBM */
.tl-item::before {
  content: '';
  position: absolute;
  left: -4px; top: 6px;
  width: 9px; height: 9px;
  background: var(--bg);
  border: 2px solid var(--layer-2);
}
.tl-item.done::before { border-color: var(--blue); background: var(--blue); }
.tl-item.now::before  {
  border-color: var(--pink);
  background: var(--pink);
  box-shadow: 0 0 12px rgba(238, 83, 150, 0.65);
}
.tl-item.now .tl-year { color: var(--pink-soft); }

.tl-year {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--text-3);
  padding-top: 2px;
}
.tl-body h3 {
  font-weight: 500;
  font-size: 1.05rem;
  margin-bottom: 0.35rem;
}
.tl-body p { color: var(--text-2); font-size: 0.92rem; max-width: 62ch; }

.badge {
  display: inline-block;
  vertical-align: middle;
  margin-left: 0.6rem;
  padding: 0.15rem 0.5rem;
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  color: var(--pink-soft);
  border: 1px solid var(--pink);
}

.tl-item.next { opacity: 0.55; }

/* ---------- 03 Proyectos ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.card {
  background: var(--bg);
  padding: 1.7rem 1.6rem 1.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  transition: background 0.25s ease;
  position: relative;
}
.card::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: var(--grad);
  opacity: 0;
  transition: opacity 0.25s ease;
}
.card:hover { background: var(--layer); }
.card:hover::before { opacity: 1; }

.card-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.64rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.card-tag { color: var(--blue-30); }
.card-status { color: var(--text-3); }

.card h3 { font-weight: 500; font-size: 1.15rem; }
.card p { color: var(--text-2); font-size: 0.9rem; flex: 1; }

.progress {
  margin-top: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.9rem;
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  color: var(--text-3);
}
.progress span {
  flex: 1;
  height: 4px;
  background: var(--layer-2);
  position: relative;
}
.progress span::after {
  content: '';
  position: absolute;
  inset: 0 auto 0 0;
  width: calc(var(--p) * 1%);
  background: var(--grad);
}
.progress em { font-style: normal; white-space: nowrap; }

/* ---------- 04 Áreas ---------- */
.areas-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: clamp(1.5rem, 4vw, 3rem);
}

.area { border-top: 2px solid var(--blue); padding-top: 1.3rem; }
.area:nth-child(2) { border-top-color: var(--purple); }
.area:nth-child(3) { border-top-color: var(--pink); }

.area h3 {
  font-size: 0.8rem;
  letter-spacing: 0.24em;
  margin-bottom: 1.1rem;
  color: var(--text);
}
.area ul { list-style: none; }
.area li {
  padding: 0.55rem 0;
  border-top: 1px solid var(--border-soft);
  color: var(--text-2);
  font-size: 0.92rem;
}
.area li:first-child { border-top: none; }
.area li em { color: var(--text-3); font-style: normal; font-size: 0.82rem; }

/* ---------- 05 Contacto ---------- */
.contact-list { list-style: none; }
.contact-list li { border-top: 1px solid var(--border); }
.contact-list li:last-child { border-bottom: 1px solid var(--border); }
.contact-list a {
  display: block;
  padding: 1.3rem 0.4rem;
  font-size: clamp(0.9rem, 2.4vw, 1.15rem);
  letter-spacing: 0.06em;
  color: var(--text-2);
  transition: color 0.2s ease, padding-left 0.25s ease, background 0.2s ease;
}
.contact-list a:hover {
  color: var(--text);
  padding-left: 1.1rem;
  background: linear-gradient(90deg, rgba(69,137,255,0.08), rgba(238,83,150,0.05));
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.8rem;
  padding: 1.4rem var(--gutter);
  border-top: 1px solid var(--border);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
}

/* ============================================================
   SUBPÁGINAS (proyectos, guías, blog, vídeos)
   ============================================================ */
.page { padding-top: var(--nav-h); min-height: 100vh; }

.page-hero {
  padding: clamp(3.5rem, 9vh, 6rem) var(--gutter) clamp(2.5rem, 6vh, 4rem);
  border-bottom: 1px solid var(--border-soft);
  background:
    radial-gradient(ellipse 55% 60% at 85% 0%, rgba(69,137,255,0.07), transparent 70%),
    radial-gradient(ellipse 40% 50% at 15% 100%, rgba(238,83,150,0.05), transparent 70%);
}
.page-title {
  font-weight: 300;
  font-size: clamp(2.4rem, 6.5vw, 4.5rem);
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin-top: 1.2rem;
}
.page-title .grad {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.page-desc {
  color: var(--text-2);
  max-width: 62ch;
  margin-top: 1.1rem;
  font-size: 1.02rem;
  font-weight: 300;
}

/* Filas tipo lista Carbon (guías, entradas de blog) */
.row-list { list-style: none; border-top: 1px solid var(--border); }
.row-list li { border-bottom: 1px solid var(--border); }
.row-list a, .row-list .row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1.5rem;
  padding: 1.4rem 0.4rem;
  transition: padding-left 0.25s ease, background 0.2s ease;
}
.row-list a:hover {
  padding-left: 1.1rem;
  background: linear-gradient(90deg, rgba(69,137,255,0.08), rgba(238,83,150,0.05));
}
.row-title { font-weight: 500; font-size: 1.08rem; color: var(--text); }
.row-sub { color: var(--text-2); font-size: 0.9rem; margin-top: 0.25rem; max-width: 64ch; }
.row-meta {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
  white-space: nowrap;
  flex-shrink: 0;
}
.row-meta.soon { color: var(--pink-soft); }

/* Rejilla de vídeos */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
.video-tile {
  background: var(--layer);
  aspect-ratio: 16 / 9;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.2rem;
  position: relative;
  overflow: hidden;
  transition: background 0.25s ease;
}
.video-tile::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 90% at 20% 10%, rgba(69,137,255,0.14), transparent 60%),
    radial-gradient(ellipse 70% 80% at 90% 90%, rgba(238,83,150,0.10), transparent 60%);
}
.video-tile:hover { background: var(--layer-2); }
.video-tile > * { position: relative; }
.video-play {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  color: var(--blue-30);
  margin-bottom: 0.5rem;
}
.video-name { font-weight: 500; font-size: 1rem; color: var(--text); }

.note-strip {
  margin-top: 1.6rem;
  padding: 1rem 1.2rem;
  border-left: 2px solid var(--blue);
  background: var(--layer);
  color: var(--text-2);
  font-size: 0.88rem;
}
.note-strip .mono { color: var(--blue-30); font-size: 0.7rem; letter-spacing: 0.14em; }

/* ============================================================
   ANIMACIÓN DE APARICIÓN
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s cubic-bezier(0.2, 0.6, 0.2, 1),
              transform 0.7s cubic-bezier(0.2, 0.6, 0.2, 1);
}
.reveal.visible { opacity: 1; transform: none; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 760px) {
  .nav { padding: 0 1rem; }
  .nav-links {
    gap: 1.1rem;
    overflow-x: auto;
    max-width: 62vw;
    scrollbar-width: none;           /* Firefox */
    -ms-overflow-style: none;        /* Edge legacy */
  }
  .nav-links::-webkit-scrollbar { display: none; }  /* Chromium */
  .nav-links a { font-size: 0.62rem; letter-spacing: 0.08em; }
  .about-grid { grid-template-columns: 1fr; }
  .tl-item { grid-template-columns: 4rem 1fr; padding-left: 1.8rem; }
  .hero-telemetry { font-size: 0.6rem; }
}

/* ============================================================
   ACCESIBILIDAD — movimiento reducido
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-scroll .chev { animation: none; }
}