/* ============================================================
   Apuntes AWS — arquitechthor.github.io/aws-cert-study
   Paleta y componentes base copiados de kopi-web/styles.css (los
   repos son independientes). Reutiliza las variables de :root en
   vez de escribir colores a mano.
   ============================================================ */

:root {
  --bg: #070a14;
  --bg-alt: #0b0f20;
  --surface: #10142a;
  --surface-2: #161b38;
  --border: rgba(148, 163, 184, 0.14);
  --border-strong: rgba(148, 163, 184, 0.28);
  --text: #f1f5f9;
  --text-muted: #a3adc2;
  --text-faint: #6b7490;

  --cyan: #22d3ee;
  --cyan-strong: #67e8f9;
  --violet: #a855f7;
  --violet-strong: #c084fc;
  --magenta: #fb7185;
  --green: #4ade80;
  --amber: #fbbf24;

  --gradient-brand: linear-gradient(135deg, var(--cyan) 0%, var(--violet) 55%, var(--magenta) 100%);
  --gradient-radial: radial-gradient(circle at 30% 20%, rgba(34, 211, 238, 0.18), transparent 45%),
                     radial-gradient(circle at 80% 0%, rgba(168, 85, 247, 0.16), transparent 40%),
                     radial-gradient(circle at 60% 80%, rgba(251, 113, 133, 0.10), transparent 45%);

  --shadow-glow: 0 0 0 1px var(--border), 0 20px 60px -20px rgba(34, 211, 238, 0.25);
  --radius: 16px;
  --radius-sm: 10px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--cyan-strong); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; }

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

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}
@media (max-width: 560px) { .container { padding: 0 16px; } }

section { padding: 72px 0; position: relative; }
section + section { border-top: 1px solid var(--border); }

.eyebrow {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan-strong);
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.25);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 18px;
}

h1, h2, h3 { line-height: 1.15; margin: 0 0 16px; font-weight: 800; letter-spacing: -0.01em; }
h1 { font-size: clamp(30px, 5vw, 44px); }
h2 { font-size: clamp(24px, 3.4vw, 32px); }
h3 { font-size: 18px; }
p { color: var(--text-muted); margin: 0 0 16px; }

.section-head { max-width: 680px; margin: 0 auto 40px; text-align: center; }
.section-head p { font-size: 16px; }

.gradient-text {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ── Nav ─────────────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(7, 10, 20, 0.82);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  max-width: 1120px;
  margin: 0 auto;
  position: relative;
}
.nav-brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 15px; color: var(--text); }
.nav-brand:hover { text-decoration: none; }
.nav-logo {
  width: 32px; height: 32px; background: #fff; border-radius: 8px;
  padding: 3px; object-fit: contain; flex-shrink: 0;
}
.nav-links { display: flex; align-items: center; gap: 24px; }
.nav-links a { color: var(--text-muted); font-size: 14px; font-weight: 500; }
.nav-links a:hover, .nav-links a[aria-current] { color: var(--text); text-decoration: none; }
.nav-toggle { display: none; }

@media (max-width: 760px) {
  .nav-inner { padding: 12px 16px; }
  .nav-links { display: none; }
  .nav-links.nav-links-open {
    display: flex; flex-direction: column; align-items: flex-start; gap: 14px;
    position: absolute; top: 58px; right: 16px;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: 12px; padding: 16px 20px;
  }
  .nav-toggle {
    display: inline-flex; background: none; border: 1px solid var(--border-strong);
    color: var(--text); border-radius: 8px; padding: 8px 10px; cursor: pointer;
  }
}

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 20px; border-radius: 10px; font-size: 14.5px; font-weight: 700;
  border: 1px solid transparent; cursor: pointer; white-space: nowrap; font-family: inherit;
  transition: transform .15s ease, box-shadow .15s ease, opacity .15s ease;
}
.btn:hover { text-decoration: none; }
.btn-primary {
  background: var(--gradient-brand); color: #04060c;
  box-shadow: 0 10px 30px -10px rgba(34, 211, 238, 0.5);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 14px 34px -10px rgba(168, 85, 247, 0.55); }
.btn-secondary {
  background: var(--surface-2); color: var(--text); border-color: var(--border-strong);
}
.btn-secondary:hover { border-color: var(--cyan); }
.btn-sm { padding: 8px 14px; font-size: 13px; }
.btn[disabled] { opacity: 0.5; cursor: default; transform: none; }

/* ── Hero ────────────────────────────────────────────────── */
.hero {
  padding: 72px 0 64px;
  background: var(--gradient-radial), var(--bg);
  border-top: none;
}
.hero h1 { font-size: clamp(34px, 6vw, 56px); }
.hero-desc { font-size: 17px; max-width: 680px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 8px; }

/* ── Cards y grids ───────────────────────────────────────── */
.grid { display: grid; gap: 20px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 960px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .grid-4 { grid-template-columns: 1fr; } }

.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; transition: border-color .15s ease, transform .15s ease;
}
.card h3 { margin-bottom: 8px; }
.card p { margin: 0; font-size: 14.5px; }

/* Tarjeta de certificación */
.cert-card { display: flex; flex-direction: column; gap: 10px; }
.cert-card .cert-code { font-family: var(--font-mono); font-size: 13px; color: var(--cyan-strong); }
.cert-card h3 { font-size: 16.5px; margin: 0; }
.cert-card .cert-meta { font-size: 13px; color: var(--text-faint); margin: 0; }
.cert-card .cert-actions { margin-top: auto; display: flex; gap: 10px; flex-wrap: wrap; }

/* ── Chips y badges ──────────────────────────────────────── */
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12.5px; font-weight: 600; line-height: 1;
  padding: 6px 10px; border-radius: 999px;
  background: var(--surface-2); color: var(--text-muted); border: 1px solid var(--border-strong);
  font-family: inherit;
}
a.chip:hover { color: var(--text); border-color: var(--cyan); text-decoration: none; }
button.chip { cursor: pointer; }
button.chip:hover { color: var(--text); border-color: var(--cyan); }
button.chip[aria-pressed="true"] {
  background: rgba(34, 211, 238, 0.14); color: var(--cyan-strong); border-color: rgba(34, 211, 238, 0.55);
}
.chip-cert { font-family: var(--font-mono); font-size: 12px; }
.chip-kopi { color: var(--violet-strong); border-color: rgba(168, 85, 247, 0.45); }
button.chip-kopi[aria-pressed="true"] { background: rgba(168, 85, 247, 0.16); color: var(--violet-strong); border-color: rgba(168, 85, 247, 0.6); }

.badge {
  display: inline-block; font-size: 11.5px; font-weight: 700; letter-spacing: 0.04em;
  text-transform: uppercase; padding: 4px 9px; border-radius: 6px; line-height: 1.2;
}
.badge-pendiente { background: rgba(148, 163, 184, 0.12); color: var(--text-faint); }
.badge-publicado { background: rgba(74, 222, 128, 0.12); color: var(--green); }
.badge-finalizado { background: rgba(34, 211, 238, 0.14); color: var(--cyan-strong); }
.badge-vigente { background: rgba(74, 222, 128, 0.12); color: var(--green); }
.badge-retirandose { background: rgba(251, 191, 36, 0.14); color: var(--amber); }
.badge-guia-pendiente { background: rgba(168, 85, 247, 0.16); color: var(--violet-strong); }

.cat-en { color: var(--text-faint); font-style: italic; font-weight: 400; }
/* Siglas con tooltip (assets/siglas.js). La explicación de la primera aparición (.sigla-exp)
   solo la leen los lectores de pantalla. */
abbr.sigla { position: relative; /* contiene .sigla-exp dentro de las tablas con scroll */ text-decoration: underline dotted; text-decoration-color: var(--text-faint); text-underline-offset: 3px; cursor: help; }
abbr.sigla:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; border-radius: 3px; }
.sigla-exp { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.sigla-tip {
  position: fixed; z-index: 100; max-width: min(320px, calc(100vw - 16px)); padding: 8px 10px;
  background: var(--surface-2); color: var(--text); border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm); box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  font-size: 13px; line-height: 1.45; pointer-events: none;
}
.sigla-tip[hidden] { display: none; }
.sigla-tip em { color: var(--cyan-strong); }
.sigla-tip span { display: block; color: var(--text-muted); margin-top: 2px; }

/* Iconos oficiales de AWS: se muestran tal cual, sin recolorear ni recortar. */
.cat-icon { display: inline-block; width: 18px; height: 18px; border-radius: 3px; vertical-align: -4px; margin-right: 6px; }
.service-icon { width: 36px; height: 36px; flex: none; border-radius: 6px; }
.service-icon-lg { width: 56px; height: 56px; flex: none; border-radius: 8px; }

/* ── Catálogo: filtros ───────────────────────────────────── */
.filters {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; display: grid; gap: 16px; margin-bottom: 20px;
}
.filter-row { display: grid; grid-template-columns: 2fr 1.4fr 1fr; gap: 14px; }
@media (max-width: 760px) { .filter-row { grid-template-columns: 1fr; } }
.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.field-label { font-size: 12.5px; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; }
.input, .select {
  width: 100%; font: inherit; font-size: 14.5px; color: var(--text);
  background: var(--bg-alt); border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  padding: 10px 12px;
}
.select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--text-muted) 50%), linear-gradient(135deg, var(--text-muted) 50%, transparent 50%);
  background-position: calc(100% - 18px) 55%, calc(100% - 13px) 55%; background-size: 5px 5px; background-repeat: no-repeat; padding-right: 32px; }
.select-wrap { position: relative; display: block; }
.select-icono { position: absolute; left: 12px; top: 50%; width: 20px; height: 20px; transform: translateY(-50%); border-radius: 3px; pointer-events: none; }
.select-icono[hidden] { display: none; }
.select.select-con-icono { padding-left: 42px; }
.input:focus, .select:focus { outline: none; border-color: var(--cyan); }
.field-head { display: flex; align-items: center; justify-content: space-between; gap: 8px 12px; flex-wrap: wrap; }
.field-hint { font-size: 13px; color: var(--text-faint); margin: 0; }
.segmented { display: inline-flex; border: 1px solid var(--border-strong); border-radius: 999px; padding: 2px; background: var(--bg-alt); }
.segmented button {
  font: inherit; font-size: 12.5px; font-weight: 600; line-height: 1; cursor: pointer;
  padding: 6px 12px; border: 0; border-radius: 999px; background: transparent; color: var(--text-muted);
}
.segmented button:hover { color: var(--text); }
.segmented button[aria-checked="true"] { background: rgba(34, 211, 238, 0.14); color: var(--cyan-strong); }
.segmented button:focus-visible { outline: 2px solid var(--cyan); outline-offset: 1px; }
.filters-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.result-count { font-size: 14px; color: var(--text-muted); margin: 0; }

/* ── Catálogo: tarjetas de servicio ──────────────────────── */
.service-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
@media (max-width: 560px) { .service-grid { grid-template-columns: 1fr; } }
.service-card {
  display: flex; flex-direction: column; gap: 10px; color: inherit;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; transition: border-color .15s ease, transform .15s ease;
}
.service-card:hover { border-color: var(--border-strong); transform: translateY(-2px); text-decoration: none; }
.service-card-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.service-card-title { display: flex; align-items: center; gap: 12px; min-width: 0; }
.service-card h3 { font-size: 16px; margin: 0; color: var(--text); }
.service-card .service-cat { font-size: 13px; color: var(--text-muted); margin: 0; }
.service-card .service-resumen { font-size: 13.5px; margin: 0; }
.empty-state { text-align: center; padding: 40px 16px; color: var(--text-muted); }

/* ── Página de servicio ──────────────────────────────────── */
.page-header { padding: 32px 0 8px; border-top: none; }
.page-section { padding: 24px 0 72px; border-top: none; }
.back-link { display: inline-block; margin-bottom: 20px; font-size: 14px; }
.service-head { display: grid; gap: 12px; margin-bottom: 28px; }
.service-head h1 { margin: 0; }
.service-title { display: flex; align-items: center; gap: 16px; }
@media (max-width: 560px) { .service-title { gap: 12px; } .service-icon-lg { width: 44px; height: 44px; } }
.service-head .full-name { font-size: 15px; color: var(--text-faint); margin: 0; }
.meta-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; font-size: 14px; color: var(--text-muted); }
.meta-row strong { color: var(--text); font-weight: 600; }
.meta-row.meta-frase { display: block; font-size: 15px; color: var(--text-muted); }

.coming-soon {
  background: var(--surface); border: 1px dashed var(--border-strong); border-radius: var(--radius);
  padding: 36px 24px; text-align: center;
}
.coming-soon .coming-icon { font-size: 40px; margin-bottom: 12px; }

.doc { max-width: 820px; overflow-wrap: break-word; } /* palabras largas (nombres de error, API) no desbordan en móvil */
.doc h2 { font-size: 22px; margin: 40px 0 12px; }
.doc h3 { font-size: 17px; margin: 24px 0 10px; }
.doc p, .doc li { color: var(--text-muted); font-size: 15.5px; }
.doc ul, .doc ol { padding-left: 1.4em; margin: 0 0 16px; }
.doc li { margin: 4px 0; }
.doc strong { color: var(--text); }
.doc code { font-family: var(--font-mono); font-size: 0.88em; background: var(--surface-2); padding: 2px 6px; border-radius: 5px; color: var(--cyan-strong); }
.doc blockquote {
  margin: 0 0 16px; padding: 10px 16px; border-left: 3px solid var(--violet);
  background: var(--surface); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.doc blockquote p { margin: 0 0 6px; color: var(--text); }
.doc blockquote cite { font-size: 13px; color: var(--text-faint); font-style: normal; }
.table-wrap { overflow-x: auto; margin: 0 0 16px; }
.doc table { border-collapse: collapse; width: 100%; font-size: 14.5px; }
.doc th, .doc td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
.doc th { color: var(--text); font-weight: 700; background: var(--surface); }
.doc td { color: var(--text-muted); }
.callout {
  background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  padding: 14px 16px; margin: 0 0 16px; font-size: 14.5px; color: var(--text-muted);
}
.callout-warn { border-color: rgba(251, 191, 36, 0.45); }
.callout strong { color: var(--text); }

/* ── Quiz ────────────────────────────────────────────────── */
.quiz { display: grid; gap: 16px; }
.quiz-question {
  min-width: 0; /* un fieldset crece por defecto hasta su palabra más larga */
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; margin: 0;
}
/* float + width: saca el <legend> del borde del fieldset para que quede dentro de la tarjeta. */
.quiz-question legend { float: left; width: 100%; padding: 0; margin-bottom: 12px; }
.quiz-question legend + * { clear: both; }
.quiz-num { font-size: 12.5px; font-weight: 700; color: var(--cyan-strong); text-transform: uppercase; letter-spacing: 0.06em; }
.quiz-stem { color: var(--text); font-size: 15.5px; margin: 6px 0 0; font-weight: 600; }
.quiz-hint { font-size: 13px; color: var(--text-faint); margin: 4px 0 0; }
.quiz-options { display: grid; gap: 8px; margin: 0 0 14px; }
.quiz-option {
  display: flex; gap: 10px; align-items: flex-start; cursor: pointer;
  padding: 10px 12px; border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--bg-alt); color: var(--text-muted); font-size: 14.5px;
}
.quiz-option:hover { border-color: var(--border-strong); }
.quiz-option input { margin-top: 4px; accent-color: var(--cyan); flex-shrink: 0; }
.quiz-option.is-correct { border-color: rgba(74, 222, 128, 0.6); color: var(--text); }
.quiz-option.is-wrong { border-color: rgba(251, 113, 133, 0.6); }
.quiz-feedback { margin-top: 12px; padding: 12px 14px; border-radius: var(--radius-sm); background: var(--bg-alt); font-size: 14.5px; }
.quiz-feedback p { margin: 0 0 8px; }
.quiz-feedback .ok { color: var(--green); font-weight: 700; }
.quiz-feedback .ko { color: var(--magenta); font-weight: 700; }
.quiz-feedback ul { margin: 0; padding-left: 1.2em; font-size: 13.5px; }
.quiz-progreso {
  display: grid; gap: 10px; justify-items: start; padding: 14px 16px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm);
}
.quiz-progreso-texto { margin: 0; font-size: 14.5px; color: var(--text-muted); }
.quiz-progreso-texto.ok { color: var(--cyan-strong); font-weight: 700; }
.quiz-acciones { display: flex; flex-wrap: wrap; gap: 8px; }
.quiz-barra { width: 100%; height: 6px; border-radius: 999px; background: var(--bg-alt); overflow: hidden; }
.quiz-barra span { display: block; height: 100%; background: var(--gradient-brand); transition: width .3s ease; }
.chip-ok { display: none; color: var(--green); border-color: rgba(74, 222, 128, 0.45); }
.quiz-question.is-acertada .chip-ok { display: inline-flex; }
.quiz-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }

/* ── Footer ──────────────────────────────────────────────── */
footer { padding: 36px 0; border-top: 1px solid var(--border); }
.footer-top { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-size: 13.5px; color: var(--text-faint); }
.footer-links { display: flex; gap: 8px 20px; flex-wrap: wrap; }
.footer-links a { font-size: 13.5px; color: var(--text-muted); }
.footer-legal { margin: 20px 0 0; font-size: 12.5px; color: var(--text-faint); line-height: 1.55; max-width: 900px; }
.footer-legal a { color: var(--text-muted); text-decoration: underline; }
/* Línea común de webs al final del pie (igual en kopi-web, aws-cert-study y arquitechthor.github.io) */
.footer-sitios {
  flex-basis: 100%; display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px;
  margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--border); font-size: 13.5px;
}
.footer-sitios a { color: var(--text-muted); }
.footer-sitios a + a::before { content: "·"; display: inline-block; margin-right: 12px; color: var(--text-faint); }
.footer-sitios a[aria-current] { color: var(--text); font-weight: 600; }

/* ── Utilities ───────────────────────────────────────────── */
.center { text-align: center; }
.text-faint { color: var(--text-faint); }
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}