/* Medicina en resumen · sitio. Una columna de lectura (máx. 1040 px), barra superior fija, tarjetas solo donde hay un objeto descargable. Dark-first como los videos. */
:root {
  --bg: #06152B;
  --bg2: #0A2140;
  --surface: #0D2747;
  --line: #1D3A5E;
  --fg: #E8F0F7;
  --muted: #94AAC2;
  --accent: #5EEAD4;
  --accent-ink: #06152B;
  --amber: #FBBF24;
  --red: #FF7A86;
  --green: #4ADE9B;
  --display: "Montserrat", "Segoe UI", system-ui, sans-serif;
  --body: "Inter", "Segoe UI", system-ui, sans-serif;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #F4F7FB; --bg2: #E9F0F7; --surface: #FFFFFF; --line: #D6E0EB; --fg: #0B1F38; --muted: #4E647C;
    --accent: #0B7F78; --accent-ink: #FFFFFF; --amber: #A16207; --red: #C53030; --green: #1F7A5A; color-scheme: light;
  }
}
:root[data-theme="light"] {
  --bg: #F4F7FB; --bg2: #E9F0F7; --surface: #FFFFFF; --line: #D6E0EB; --fg: #0B1F38; --muted: #4E647C;
  --accent: #0B7F78; --accent-ink: #FFFFFF; --amber: #A16207; --red: #C53030; --green: #1F7A5A; color-scheme: light;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--bg); color: var(--fg); font-family: var(--body); font-size: 16px; line-height: 1.55; }
a { color: var(--accent); }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.wrap { max-width: 1040px; margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }

/* barra superior */
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 10; background: var(--bg); }
.top { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 5; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 12px; flex-wrap: wrap; }
.brand { display: flex; flex-direction: column; text-decoration: none; color: var(--fg); line-height: 1.05; }
.brand b { font-family: var(--display); font-weight: 800; font-size: 18px; letter-spacing: -0.2px; }
.brand span { font-family: var(--display); font-size: 11px; font-weight: 600; color: var(--accent); letter-spacing: 1.5px; text-transform: uppercase; }
nav.main { display: flex; gap: 4px; flex-wrap: wrap; }
nav.main a { font-family: var(--display); font-weight: 600; font-size: 14px; color: var(--muted); text-decoration: none; padding: 7px 11px; border-radius: 8px; }
nav.main a:hover { color: var(--fg); background: var(--bg2); }
nav.main a[aria-current="page"] { color: var(--accent); background: var(--bg2); }

/* tipografía */
h1, h2, h3 { font-family: var(--display); margin: 0; text-wrap: balance; }
.kicker { font-family: var(--display); font-weight: 700; font-size: 12px; letter-spacing: 2px; text-transform: uppercase; color: var(--accent); }
.page-head { padding-block: 44px 20px; display: flex; flex-direction: column; gap: 10px; }
.page-head h1 { font-size: clamp(30px, 5vw, 44px); font-weight: 800; letter-spacing: -0.8px; line-height: 1.08; }
.page-head p { color: var(--muted); max-width: 64ch; margin: 0; font-size: 17px; }
.section { padding-block: 26px; display: flex; flex-direction: column; gap: 14px; }
.section > h2 { font-size: 22px; font-weight: 800; }
.muted { color: var(--muted); }

/* hero */
.hero { padding-block: 56px 30px; display: grid; grid-template-columns: 1.3fr 1fr; gap: 32px; align-items: center; }
.hero h1 { font-size: clamp(38px, 7vw, 64px); font-weight: 800; letter-spacing: -1.6px; line-height: 1.0; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p { color: var(--muted); font-size: 18px; max-width: 52ch; margin: 14px 0 22px; }
.hero .strike { font-family: var(--display); font-weight: 800; font-size: 22px; color: var(--muted); position: relative; display: inline-block; }
.hero .strike::after { content: ""; position: absolute; left: -6px; right: -6px; top: 52%; height: 5px; border-radius: 4px; background: var(--red); transform: rotate(-4deg); }
.hero-side { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 20px; display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.hero-side .row { display: flex; justify-content: space-between; gap: 12px; border-bottom: 1px solid var(--line); padding-bottom: 10px; }
.hero-side .row:last-child { border-bottom: 0; padding-bottom: 0; }
.hero-side .n { font-family: var(--display); font-weight: 800; font-size: 26px; color: var(--accent); font-variant-numeric: tabular-nums; }
@media (max-width: 760px) { .hero { grid-template-columns: 1fr; padding-top: 36px; } }

.btns { display: flex; gap: 10px; flex-wrap: wrap; }
.btn { font-family: var(--display); font-weight: 700; font-size: 15px; text-decoration: none; padding: 11px 18px; border-radius: 10px; border: 2px solid var(--accent); color: var(--accent); background: transparent; cursor: pointer; display: inline-flex; align-items: center; gap: 8px; }
.btn.primary { background: var(--accent); color: var(--accent-ink); }
.btn.small { font-size: 13px; padding: 7px 12px; border-width: 1.5px; }

/* secciones del inicio */
.grid4 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
@media (max-width: 680px) { .grid4 { grid-template-columns: 1fr; } }
.tile { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 18px; text-decoration: none; color: var(--fg); display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.tile:hover { border-color: var(--accent); }
.tile h3 { font-size: 18px; }
.tile p { margin: 0; color: var(--muted); font-size: 15px; }
.tile .state { font-family: var(--display); font-size: 12px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; color: var(--accent); }
.tile .state.soon { color: var(--amber); }

/* filtros y buscador */
.tools { display: flex; flex-direction: column; gap: 12px; }
.tools input[type="search"] { width: 100%; font: inherit; color: var(--fg); background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip { font-family: var(--display); font-weight: 600; font-size: 13px; padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line); background: transparent; color: var(--fg); cursor: pointer; }
.chip[aria-pressed="true"] { border-color: var(--accent); color: var(--accent); background: var(--bg2); }

/* tarjetas de artículo */
.list { display: flex; flex-direction: column; gap: 14px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 18px; display: grid; grid-template-columns: 1fr auto; gap: 14px 20px; align-items: start; }
@media (max-width: 680px) { .card { grid-template-columns: 1fr; } }
.card .meta { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; font-size: 13px; color: var(--muted); }
.card h3 { font-size: 19px; line-height: 1.25; margin: 6px 0 4px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; min-width: 0; }
.card .acts { display: flex; flex-direction: column; gap: 8px; align-items: stretch; }
@media (max-width: 680px) { .card .acts { flex-direction: row; flex-wrap: wrap; } }
.pill { font-family: var(--display); font-weight: 800; font-size: 11px; letter-spacing: 1px; text-transform: uppercase; padding: 4px 9px; border-radius: 6px; }
.pill.no { background: color-mix(in srgb, var(--red) 18%, transparent); color: var(--red); }
.pill.si { background: color-mix(in srgb, var(--green) 18%, transparent); color: var(--green); }
.pill.ref { background: color-mix(in srgb, var(--amber) 18%, transparent); color: var(--amber); }
.tag { border: 1px solid var(--line); border-radius: 6px; padding: 2px 8px; }
.empty { color: var(--muted); padding: 20px 0; }

/* registro */
.signup { background: var(--bg2); border: 1px solid var(--line); border-radius: 16px; padding: 22px; display: grid; grid-template-columns: 1fr 1.2fr; gap: 20px; align-items: center; }
@media (max-width: 760px) { .signup { grid-template-columns: 1fr; } }
.signup h2 { font-size: 22px; }
.signup p { margin: 6px 0 0; color: var(--muted); font-size: 15px; }
.signup form { display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.signup label { font-size: 13px; color: var(--muted); font-weight: 600; }
.signup input, .signup select, .signup textarea { width: 100%; font: inherit; color: var(--fg); background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 11px 12px; }
.signup .fine { font-size: 12px; color: var(--muted); }
.hidden-field { position: absolute; left: -9999px; }

/* bloque de método */
.method { border-left: 4px solid var(--accent); padding: 4px 0 4px 16px; color: var(--muted); max-width: 72ch; }
.method b { color: var(--fg); }

/* fuentes */
.serie { border-top: 1px solid var(--line); padding-top: 22px; display: flex; flex-direction: column; gap: 12px; scroll-margin-top: 90px; }
.serie h2 { font-size: 22px; }
.videos { display: flex; flex-wrap: wrap; gap: 6px; margin: 0; padding: 0; list-style: none; }
.videos li { font-size: 14px; background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: 4px 10px; }
.videos li b { color: var(--muted); margin-right: 6px; font-weight: 600; }
ol.refs { margin: 0; padding: 0; list-style: none; counter-reset: r; display: flex; flex-direction: column; gap: 10px; }
ol.refs li { counter-increment: r; display: grid; grid-template-columns: 2.2em 1fr; gap: 4px; }
ol.refs li::before { content: counter(r) "."; color: var(--muted); font-size: 14px; padding-top: 2px; font-variant-numeric: tabular-nums; }
.cita { min-width: 0; overflow-wrap: anywhere; }
.cita a { color: var(--fg); text-decoration-color: var(--accent); text-underline-offset: 3px; }
.uso { display: block; font-size: 14px; color: var(--muted); }
mark { background: color-mix(in srgb, var(--amber) 35%, transparent); color: inherit; border-radius: 2px; }

/* pie */
footer.site { border-top: 1px solid var(--line); margin-top: 40px; }
footer.site .wrap { padding-block: 24px 40px; display: flex; flex-direction: column; gap: 10px; font-size: 14px; color: var(--muted); }
footer.site .social { display: flex; gap: 14px; flex-wrap: wrap; }
footer.site .social a { color: var(--fg); text-decoration: none; font-weight: 600; }
.hero .strike { align-self: flex-start; }
.signup .btn { justify-content: center; }

.signup textarea { resize: vertical; min-height: 110px; }
footer.site a { color: inherit; text-decoration: underline; }

.signup .fine a { color: inherit; text-decoration: underline; }
.section h2 + p, .section p + h2, .section ul + h2 { margin-top: 14px; }
.section ul { padding-left: 22px; line-height: 1.6; }