/* ==========================================================================
   Cátedra Dr. Picasso · UBA — Obligaciones Civiles y Comerciales
   Sistema visual derivado de las presentaciones de la cátedra.
   ========================================================================== */

:root {
  /* Color */
  --navy-900: #1c1a51;
  --navy-800: #232069;
  --navy-700: #2b2882;
  --navy-600: #3a389c;
  --navy-500: #4a48b0;
  --red: #de3226;
  --red-dark: #b8261c;
  --paper: #f3f5fb;
  --white: #ffffff;
  --ink: #14133b;
  --muted: #5d6183;
  --line: #dfe3f0;
  --marker: #fbf28e;

  /* Tipografía */
  --display: "Archivo Black", "Arial Black", "Helvetica Neue", sans-serif;
  --body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  /* Medidas */
  --wrap: 1180px;
  --gutter: clamp(20px, 5vw, 56px);
  --radius: 4px;
  --shadow: 0 18px 40px -24px rgba(20, 19, 59, 0.45);
}

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

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 16.5px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: var(--navy-700); }

:focus-visible {
  outline: 3px solid var(--red);
  outline-offset: 3px;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--red);
  color: #fff;
  padding: 10px 16px;
  z-index: 99;
}
.skip:focus { left: 8px; top: 8px; }

/* --------------------------------------------------------------------------
   Tipografía base
   -------------------------------------------------------------------------- */

h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.04;
  margin: 0;
}

p { margin: 0 0 1em; }

.eyebrow {
  font-family: var(--body);
  font-weight: 700;
  font-size: 0.68rem;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--red);
  margin: 0 0 14px;
}
.eyebrow.on-navy { color: #b9bcdf; }

.rule {
  width: 74px;
  height: 6px;
  background: var(--red);
  border: 0;
  margin: 0 0 26px;
}

.lead {
  font-size: 1.08rem;
  color: var(--muted);
  max-width: 62ch;
}

.mono {
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.01em;
}

.mark {
  background: linear-gradient(transparent 58%, var(--marker) 58%);
  padding-bottom: 1px;
}

/* --------------------------------------------------------------------------
   Encabezado y navegación
   -------------------------------------------------------------------------- */

.topbar {
  background: var(--navy-800);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 3px solid var(--red);
}

.topbar__inner {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 74px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: #fff;
  text-decoration: none;
  margin-right: auto;
}
.brand__mark {
  width: 46px;
  height: 46px;
  flex: none;
  filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.35));
}
.brand__name {
  font-family: var(--display);
  font-size: 1.02rem;
  letter-spacing: -0.01em;
  line-height: 1.1;
}
.brand__sub {
  font-size: 0.63rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: #a9adda;
}

.nav { display: flex; align-items: center; gap: 4px; }

.nav a {
  color: #dfe1f5;
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 9px 13px;
  border-radius: var(--radius);
  border-bottom: 2px solid transparent;
}
.nav a:hover { color: #fff; background: rgba(255, 255, 255, 0.09); }
.nav a[aria-current="page"] {
  color: #fff;
  border-bottom-color: var(--red);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #fff;
  border-radius: var(--radius);
  padding: 9px 12px;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}

@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    flex-direction: column;
    align-items: stretch;
    background: var(--navy-900);
    padding: 10px var(--gutter) 18px;
    border-bottom: 3px solid var(--red);
  }
  .nav.is-open { display: flex; }
  .nav a { padding: 12px 4px; border-bottom: 1px solid rgba(255, 255, 255, 0.08); }
}

/* --------------------------------------------------------------------------
   Portada (réplica del cover de las presentaciones)
   -------------------------------------------------------------------------- */

.hero {
  background: var(--navy-600);
  color: #fff;
  display: grid;
  grid-template-columns: 1fr 400px;
  min-height: 520px;
}

.hero__text {
  padding: clamp(44px, 7vw, 92px) var(--gutter);
  max-width: calc(var(--wrap) * 0.72);
  margin-left: auto;
  align-self: center;
}

.hero__seal {
  background: var(--navy-900);
  display: grid;
  place-items: center;
  padding: 40px;
}
.hero__seal svg,
.hero__seal img {
  width: min(300px, 78%);
  height: auto;
  filter: drop-shadow(0 22px 34px rgba(0, 0, 0, 0.45));
}

.hero h1 {
  font-size: clamp(2.9rem, 7vw, 5.1rem);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.hero__claim {
  font-family: var(--display);
  color: var(--red);
  font-size: clamp(1.35rem, 3.1vw, 2.15rem);
  line-height: 1.12;
  margin: 0 0 22px;
}

.hero__meta {
  font-size: 0.95rem;
  color: #c9cbe8;
  border-left: 3px solid var(--red);
  padding-left: 16px;
  margin-bottom: 30px;
}
.hero__meta strong { color: #fff; font-weight: 600; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; min-height: 0; }
  .hero__text { margin-left: 0; max-width: none; }
  .hero__seal { order: -1; padding: 34px; }
  .hero__seal svg,
  .hero__seal img { width: 156px; }
}

/* --------------------------------------------------------------------------
   Botones
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--body);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  padding: 13px 22px;
  border-radius: var(--radius);
  border: 2px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease;
}
.btn:hover { transform: translateY(-2px); }

.btn--red { background: var(--red); color: #fff; }
.btn--red:hover { background: var(--red-dark); }

.btn--ghost { border-color: rgba(255, 255, 255, 0.55); color: #fff; }
.btn--ghost:hover { background: rgba(255, 255, 255, 0.12); }

.btn--navy { background: var(--navy-700); color: #fff; }
.btn--navy:hover { background: var(--navy-800); }

.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }

/* --------------------------------------------------------------------------
   Secciones y cabeceras internas
   -------------------------------------------------------------------------- */

.section { padding: clamp(52px, 8vw, 96px) 0; }
.section--tight { padding: clamp(38px, 5vw, 60px) 0; }
.section--navy { background: var(--navy-800); color: #fff; }
.section--navy h2 { color: #fff; }
.section--navy .lead { color: #c3c6e6; }
.section--white { background: var(--white); }

.section__head { margin-bottom: 42px; }
.section__head h2 { font-size: clamp(1.9rem, 4vw, 2.9rem); margin-bottom: 14px; }

.pagehead {
  background: var(--navy-800);
  color: #fff;
  padding: clamp(46px, 7vw, 82px) 0 clamp(38px, 6vw, 64px);
  border-bottom: 6px solid var(--red);
}
.pagehead h1 { font-size: clamp(2.2rem, 5.5vw, 3.6rem); margin-bottom: 16px; }
.pagehead .lead { color: #c3c6e6; }

/* --------------------------------------------------------------------------
   Recorrido numerado (hilo conductor)
   -------------------------------------------------------------------------- */

.steps { list-style: none; margin: 0; padding: 0; }

.step {
  display: grid;
  grid-template-columns: 74px 1fr;
  gap: 22px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
  align-items: start;
}
.step:first-child { border-top: 0; }

.step__num {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--navy-700);
  color: #fff;
  display: grid;
  place-items: center;
  font-family: var(--display);
  font-size: 1.5rem;
}
.step:last-child .step__num { background: var(--red); }

.step h3 { font-size: 1.22rem; margin-bottom: 6px; }
.step p { margin: 0; color: var(--muted); font-size: 0.96rem; }

@media (max-width: 620px) {
  .step { grid-template-columns: 52px 1fr; gap: 16px; }
  .step__num { width: 46px; height: 46px; font-size: 1.15rem; }
}

/* --------------------------------------------------------------------------
   Grillas y tarjetas
   -------------------------------------------------------------------------- */

.grid { display: grid; gap: 22px; }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); }

.split {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(300px, 1fr);
  gap: 44px;
  align-items: start;
}
@media (max-width: 880px) {
  .split { grid-template-columns: 1fr; gap: 34px; }
}

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 6px solid var(--navy-700);
  border-radius: var(--radius);
  padding: 26px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: var(--shadow);
}
.card--accent { border-top-color: var(--red); }
.card h3 { font-size: 1.18rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.card__foot { margin-top: auto; padding-top: 14px; }

.card-link {
  text-decoration: none;
  color: inherit;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.card-link:hover {
  transform: translateY(-3px);
  box-shadow: 0 24px 44px -26px rgba(20, 19, 59, 0.6);
}
.card-link .go {
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--red);
}

.go {
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--red);
  text-decoration: none;
}
a.go:hover { text-decoration: underline; }

.tag {
  display: inline-block;
  font-family: var(--body);
  font-weight: 700;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 5px 10px;
  border-radius: 999px;
  background: #e9ebf7;
  color: var(--navy-700);
}
.tag--red { background: rgba(222, 50, 38, 0.12); color: var(--red-dark); }

/* --------------------------------------------------------------------------
   Fallos (tira de jurisprudencia)
   -------------------------------------------------------------------------- */

.fallo {
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 5px solid var(--red);
  border-radius: var(--radius);
  padding: 20px 22px;
}
.fallo h3 { font-size: 1.05rem; margin-bottom: 4px; }
.fallo .mono { color: var(--muted); display: block; margin-bottom: 10px; }
.fallo p { margin: 0; font-size: 0.93rem; color: var(--muted); }

/* --------------------------------------------------------------------------
   Tabla de comisiones
   -------------------------------------------------------------------------- */

.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }

table.data {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
  font-size: 0.94rem;
}
table.data th {
  background: var(--navy-800);
  color: #fff;
  text-align: left;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 13px 16px;
  font-weight: 700;
}
table.data td { padding: 14px 16px; border-top: 1px solid var(--line); vertical-align: top; }
table.data tbody tr:hover { background: #f7f8fd; }
table.data .num { font-family: var(--display); color: var(--navy-700); }

/* --------------------------------------------------------------------------
   Filtros
   -------------------------------------------------------------------------- */

.filters { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 26px; }

.chip {
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--navy-700);
  cursor: pointer;
}
.chip[aria-pressed="true"] { background: var(--navy-700); border-color: var(--navy-700); color: #fff; }

/* --------------------------------------------------------------------------
   Docentes
   -------------------------------------------------------------------------- */

.person { display: grid; grid-template-columns: 78px 1fr; gap: 18px; align-items: start; }
.person__avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--navy-700);
  color: #fff;
  display: grid;
  place-items: center;
  font-family: var(--display);
  font-size: 1.35rem;
  letter-spacing: 0;
}
.person__role {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--red);
  margin-bottom: 4px;
}
.person h3 { font-size: 1.1rem; margin-bottom: 6px; }
.person p { font-size: 0.92rem; color: var(--muted); margin: 0; }

/* --------------------------------------------------------------------------
   Material
   -------------------------------------------------------------------------- */

.resource {
  display: grid;
  grid-template-columns: 52px 1fr auto;
  gap: 18px;
  align-items: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.resource:hover { border-color: var(--navy-500); transform: translateX(3px); }
.resource__icon {
  width: 46px;
  height: 46px;
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  background: #eef0fa;
  color: var(--navy-700);
}
.resource__icon svg { width: 22px; height: 22px; }
.resource--video .resource__icon { background: rgba(222, 50, 38, 0.12); color: var(--red); }
.resource h3 { font-size: 1rem; margin-bottom: 3px; }
.resource p { margin: 0; font-size: 0.86rem; color: var(--muted); }
.resource__go { color: var(--red); font-weight: 700; font-size: 0.85rem; }

.stack { display: grid; gap: 12px; }

@media (max-width: 620px) {
  .resource { grid-template-columns: 44px 1fr; }
  .resource__go { display: none; }
}

/* --------------------------------------------------------------------------
   Formularios
   -------------------------------------------------------------------------- */

.form {
  background: #fff;
  border: 1px solid var(--line);
  border-top: 6px solid var(--red);
  border-radius: var(--radius);
  padding: 28px 26px;
  box-shadow: var(--shadow);
}

.field { margin-bottom: 18px; }
.field label {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--navy-700);
  margin-bottom: 7px;
}
.field input,
.field select {
  width: 100%;
  font: inherit;
  font-size: 0.95rem;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fbfcff;
  color: var(--ink);
}
.field input:focus,
.field select:focus { border-color: var(--navy-500); background: #fff; }

.form__note { font-size: 0.82rem; color: var(--muted); margin: 14px 0 0; }

.status { margin: 16px 0 0; font-size: 0.9rem; font-weight: 600; min-height: 1.2em; }
.status--ok { color: #1c7a4a; }
.status--error { color: var(--red-dark); }

/* --------------------------------------------------------------------------
   Newsletter
   -------------------------------------------------------------------------- */

.issue {
  border-top: 1px solid var(--line);
  padding: 22px 0;
  display: grid;
  grid-template-columns: 132px 1fr;
  gap: 22px;
}
.issue:first-of-type { border-top: 0; }
.issue__date { font-family: var(--mono); font-size: 0.8rem; color: var(--red); padding-top: 4px; }
.issue h3 { font-size: 1.14rem; margin-bottom: 6px; }
.issue p { margin: 0 0 10px; color: var(--muted); font-size: 0.94rem; }

@media (max-width: 620px) {
  .issue { grid-template-columns: 1fr; gap: 6px; }
}

/* --------------------------------------------------------------------------
   Avisos y estados
   -------------------------------------------------------------------------- */

.callout {
  border: 1px dashed var(--navy-500);
  background: #eef0fa;
  border-radius: var(--radius);
  padding: 16px 18px;
  font-size: 0.9rem;
  color: var(--navy-800);
}
.callout code {
  font-family: var(--mono);
  font-size: 0.82rem;
  background: #fff;
  padding: 2px 6px;
  border-radius: 3px;
}

.empty {
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  color: var(--muted);
  font-size: 0.94rem;
}

/* --------------------------------------------------------------------------
   Pie
   -------------------------------------------------------------------------- */

.footer {
  background: var(--navy-900);
  color: #b9bcdf;
  padding: 54px 0 30px;
  border-top: 6px solid var(--red);
  font-size: 0.9rem;
}
.footer__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
  margin-bottom: 34px;
}
.footer__seal {
  width: 62px;
  height: 62px;
  margin-bottom: 14px;
  opacity: 0.95;
}

.footer h4 {
  font-family: var(--body);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #fff;
  margin-bottom: 12px;
}
.footer ul { list-style: none; margin: 0; padding: 0; }
.footer li { margin-bottom: 7px; }
.footer a { color: #b9bcdf; text-decoration: none; }
.footer a:hover { color: #fff; text-decoration: underline; }
.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  padding-top: 20px;
  font-size: 0.8rem;
  color: #8d91be;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: space-between;
}