/* ============================================================
   Karel González — Portafolio
   Una sola idea: centrado, limpio, un acento. Light / Dark.
   ============================================================ */

:root {
  color-scheme: light;
  --bg: #fbfbf9;
  --surface: #ffffff;
  --surface-2: #f3f4f1;
  --text: #1b1d1c;
  --muted: #6b7280;
  --border: #e6e6e1;
  --accent: #0d9488;
  --accent-soft: rgba(13, 148, 136, 0.12);
  --on-accent: #ffffff;
  --shadow: 0 18px 50px rgba(20, 30, 28, 0.08);
  --radius: 14px;
  --maxw: 1080px;
  --narrow: 720px;
  --card-w: 480px;
  --font-body: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-head: "Space Grotesk", var(--font-body);
}

body.dark-mode {
  color-scheme: dark;
  --bg: #0a192f;
  --surface: #112240;
  --surface-2: #0f1f3d;
  --text: #e6f1ff;
  --muted: #8892b0;
  --border: #233554;
  --accent: #64ffda;
  --accent-soft: rgba(100, 255, 218, 0.12);
  --on-accent: #0a192f;
  --shadow: 0 22px 60px rgba(0, 0, 0, 0.42);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background-color 220ms ease, color 220ms ease;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* Resplandor que sigue el cursor (fondo) */
.cursor-glow {
  position: fixed;
  top: 0;
  left: 0;
  z-index: -1;
  width: 620px;
  height: 620px;
  border-radius: 50%;
  pointer-events: none;
  opacity: 0;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 22%, transparent), transparent 62%);
  transition: opacity 400ms ease;
}

body.dark-mode .cursor-glow {
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 16%, transparent), transparent 62%);
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- Layout helpers ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(1.2rem, 5vw, 2.5rem);
}

.narrow { max-width: var(--narrow); }

.center { text-align: center; }
.center .actions { justify-content: center; }

.section {
  position: relative;
  padding: clamp(4rem, 9vw, 7rem) 0;
}

/* Línea divisoria centrada entre secciones */
.section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(calc(100% - 2.4rem), var(--maxw));
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border) 12%, var(--border) 88%, transparent);
}

/* ---------- Typography ---------- */
h1, h2, h3 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0;
}

h1 { font-size: clamp(3rem, 9vw, 6rem); }
h2 { font-size: clamp(2rem, 4.5vw, 3rem); }
h3 { font-size: 1.25rem; letter-spacing: -0.01em; }

.kicker {
  margin: 0 0 0.9rem;
  color: var(--accent);
  font-family: var(--font-head);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.lead {
  max-width: 56ch;
  margin: 1.4rem auto 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.lead--wide { max-width: 62ch; }
.muted { color: var(--muted); margin: 0; }

.edu-link { margin-top: 1.3rem; }

.edu-card h3 a:hover { color: var(--accent); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid color-mix(in srgb, var(--border) 75%, transparent);
}

.header-inner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 1rem;
  min-height: 70px;
}

.section-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  min-width: 0;
}

.section-nav a {
  padding: 0.45rem 0.7rem;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--muted);
  font-family: var(--font-head);
  font-size: 0.78rem;
  font-weight: 600;
  white-space: nowrap;
  transition: border-color 160ms ease, background-color 160ms ease, color 160ms ease;
}

.section-nav a:hover {
  color: var(--accent);
}

.section-nav a.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

.section[id] { scroll-margin-top: 90px; }

.site-logo {
  display: inline-grid;
  place-items: center;
  width: 58px;
  height: 58px;
  padding: 0;
  border-radius: 50%;
  border: none;
  background: transparent;
  overflow: hidden;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.logo-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.logo-img--dark { display: none; }

body.dark-mode .logo-img--light { display: none; }
body.dark-mode .logo-img--dark { display: block; }

.site-logo:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 0 3px var(--accent-soft), var(--shadow);
}

.theme-toggle {
  grid-column: 3;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 160ms ease, color 160ms ease;
}

.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

.theme-toggle__icon {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

/* ---------- Hero ---------- */
.hero {
  min-height: calc(100vh - 70px);
  display: flex;
  align-items: center;
  padding: clamp(3rem, 8vw, 6rem) 0;
}

.hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero-role {
  margin: 1.2rem 0 0;
  color: var(--accent);
  font-family: var(--font-head);
  font-size: clamp(1.1rem, 2.4vw, 1.5rem);
  font-weight: 600;
}

.hero-lead {
  max-width: 56ch;
  margin: 1.4rem 0 0;
  color: var(--muted);
  font-size: 1.12rem;
}

/* ---------- Buttons ---------- */
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2.2rem;
}

.actions--center { justify-content: center; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 1.5rem;
  border-radius: 999px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.98rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 160ms ease, background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}

.btn--solid {
  background: var(--accent);
  color: var(--on-accent);
}

.btn--solid:hover { transform: translateY(-2px); filter: brightness(1.05); }

.btn--ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* ---------- Cards (shared) ---------- */
.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

/* ---------- Education ---------- */
.edu-card {
  margin: 2.2rem auto 0;
  max-width: 560px;
  padding: 2rem;
}

.edu-degree { margin: 0.4rem 0 0.8rem; color: var(--text); font-weight: 600; }

/* ---------- Skills ---------- */
.chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
  margin: 2.2rem 0 0;
  padding: 0;
  list-style: none;
}

.chips li {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 500;
  transition: border-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.chips li:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* ---------- Certification ---------- */
.certifications-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
  margin-top: 2.2rem;
}

.cert-card {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  min-width: 0;
  padding: 1.5rem;
  text-align: left;
}

.cert-badge { width: 92px; height: 92px; object-fit: contain; flex-shrink: 0; }

.cert-meta { min-width: 0; flex: 1; }

.cert-meta h3 { margin-bottom: 0.3rem; }

.cert-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  justify-content: center;
  gap: 0.7rem;
  width: 100%;
  max-width: 620px;
  margin-top: 1rem;
}

.cert-actions .btn {
  width: 100%;
  min-width: 0;
  padding-inline: 0.7rem;
  font-size: 0.86rem;
  text-align: center;
  line-height: 1.2;
  white-space: normal;
}

/* ---------- Projects ---------- */
.projects {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 3rem;
  text-align: left;
}

/* Todas las tarjetas de proyecto miden lo mismo en cualquier página. */
.project {
  display: flex;
  flex-direction: column;
  flex: 0 1 var(--card-w);
  width: var(--card-w);
  max-width: 100%;
  overflow: hidden;
  transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
}

.project:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
}

.project__media {
  display: grid;
  place-items: center;
  height: 240px;
  padding: 14px;
  overflow: hidden;
  background:
    radial-gradient(130% 130% at 0% 0%, var(--accent-soft), transparent 55%),
    var(--surface-2);
  border-bottom: 1px solid var(--border);
}

.project__media img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  border-radius: 6px;
  box-shadow: 0 8px 24px rgba(20, 30, 28, 0.12);
  transition: transform 320ms ease;
}

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

.project__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 1.6rem;
}

.project__label {
  margin: 0 0 0.45rem;
  color: var(--accent);
  font-family: var(--font-head);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.project__body h3 { margin-bottom: 0.6rem; }

.stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 1.1rem 0 0;
  padding: 0;
  list-style: none;
}

.stack li {
  padding: 0.28rem 0.6rem;
  border-radius: 6px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 500;
  white-space: nowrap;
}

.project__links {
  display: flex;
  gap: 1.2rem;
  margin-top: auto;
  padding-top: 1.3rem;
}

.project__links a {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--text);
  border-bottom: 1px solid transparent;
  transition: color 160ms ease, border-color 160ms ease;
}

.project__links a:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- Catálogo: botón "volver" y títulos de subpáginas ---------- */
.catalog-cta { margin-top: 3rem; }

/* Título de subpáginas (catálogo y materias): cabe en una sola línea */
.page-title { font-size: clamp(2.2rem, 6vw, 3.4rem); }

/* ---------- Catálogo: tarjetas de materias ---------- */
.subjects {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
  text-align: left;
}

.subject-card {
  display: flex;
  flex-direction: column;
  padding: 1.8rem;
  transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
}

.subject-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
}

.subject-card__count {
  align-self: flex-start;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--font-head);
  font-size: 0.78rem;
  font-weight: 600;
}

.subject-card h3 { margin: 1rem 0 0.5rem; }

.subject-card .muted { flex: 1; }

.subject-card__go {
  margin-top: 1.3rem;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--accent);
}

/* Una sola tarjeta de proyecto: mismo tamaño que las demás y centrada. */
.projects--single {
  justify-content: center;
}

/* ---------- Footer ---------- */
.site-footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
  color: var(--muted);
}

.footer-inner { display: grid; gap: 0.6rem; }
.footer-name { margin: 0; font-family: var(--font-head); font-weight: 600; color: var(--text); }

.footer-nav {
  display: flex;
  justify-content: center;
  gap: 0.6rem;
  font-weight: 500;
}

.footer-nav a:hover { color: var(--accent); }

/* ---------- Reveal on scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 600ms ease, transform 600ms ease;
}

.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .header-inner {
    grid-template-columns: auto 1fr auto;
    padding-block: 0.35rem;
  }

  .section-nav {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 0.35rem;
    scrollbar-width: none;
  }

  .section-nav::-webkit-scrollbar { display: none; }
  .section[id] { scroll-margin-top: 125px; }
  .certifications-grid { grid-template-columns: 1fr; }
  .cert-card { width: min(100%, 760px); margin-inline: auto; }
}

@media (max-width: 768px) {
  .cert-actions { max-width: 100%; }
  .hero { min-height: auto; }
  .subjects { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .cert-card { flex-direction: column; text-align: center; }
  .cert-actions { grid-template-columns: 1fr; }

  .theme-toggle__text {
    max-width: 90px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation: none !important;
  }
  .reveal { opacity: 1; transform: none; }
}