/* =========================================================
   Ruta Data Engineer AWS — hoja de estilos
   ========================================================= */

:root {
  --azul-aws: #232f3e;
  --naranja: #ff9900;
  --naranja-suave: #ffb84d;

  --bg: #0e1420;
  --bg-2: #141c2b;
  --panel: #18212f;
  --panel-2: #1e2939;
  --borde: #2a374a;
  --texto: #e7edf5;
  --texto-2: #a9b6c8;
  --texto-3: #74839a;

  --ok: #3ecf8e;
  --ok-bg: rgba(62, 207, 142, .12);
  --mal: #ff6b6b;
  --mal-bg: rgba(255, 107, 107, .12);
  --info: #58a6ff;
  --info-bg: rgba(88, 166, 255, .12);
  --warn: #ffc857;
  --warn-bg: rgba(255, 200, 87, .12);

  --r-s: 8px;
  --r-m: 12px;
  --r-l: 18px;
  --sombra: 0 10px 30px rgba(0, 0, 0, .35);
  --topbar-h: 62px;
  --sidebar-w: 288px;
  --mono: "JetBrains Mono", "Cascadia Code", "Fira Code", Consolas, monospace;
  --sans: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
}

html[data-theme="light"] {
  --bg: #f4f6fa;
  --bg-2: #eaeef5;
  --panel: #ffffff;
  --panel-2: #f7f9fc;
  --borde: #dde3ec;
  --texto: #16202e;
  --texto-2: #4c5a6e;
  --texto-3: #7d8b9e;
  --ok: #12805c;
  --ok-bg: rgba(18, 128, 92, .10);
  --mal: #c9372c;
  --mal-bg: rgba(201, 55, 44, .10);
  --info: #1f6feb;
  --info-bg: rgba(31, 111, 235, .10);
  --warn: #a86b00;
  --warn-bg: rgba(255, 179, 0, .14);
  --sombra: 0 8px 24px rgba(21, 34, 51, .10);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--texto);
  font-family: var(--sans);
  font-size: 15.5px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--info); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 .5em; font-weight: 700; letter-spacing: -.01em; }
h1 { font-size: 1.9rem; }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.08rem; }
p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.25em; }
li { margin-bottom: .35em; }
small { font-size: .84rem; }

code {
  font-family: var(--mono);
  font-size: .875em;
  background: var(--panel-2);
  border: 1px solid var(--borde);
  border-radius: 6px;
  padding: .1em .38em;
  color: var(--naranja-suave);
  white-space: nowrap;
}
html[data-theme="light"] code { color: #b45309; }

/* ================= BARRA SUPERIOR ================= */
.topbar {
  position: sticky; top: 0; z-index: 60;
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 14px;
  padding: 0 16px;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--borde);
}

.brand { display: flex; align-items: center; gap: 10px; color: inherit; flex-shrink: 0; }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 36px; height: 36px; border-radius: 10px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--naranja), #ff6a00);
  color: #1b1300; font-weight: 800; font-size: .9rem;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: .96rem; }
.brand-text small { color: var(--texto-3); font-size: .72rem; }

.search-wrap { position: relative; flex: 1; max-width: 460px; margin-left: auto; }
#buscador {
  width: 100%; height: 38px;
  padding: 0 12px;
  border-radius: 10px;
  border: 1px solid var(--borde);
  background: var(--panel);
  color: var(--texto);
  font-family: inherit; font-size: .88rem;
}
#buscador:focus { outline: 2px solid var(--naranja); outline-offset: 1px; }

.search-results {
  position: absolute; top: 44px; left: 0; right: 0;
  background: var(--panel); border: 1px solid var(--borde);
  border-radius: var(--r-m); box-shadow: var(--sombra);
  max-height: 60vh; overflow: auto; padding: 6px;
  z-index: 70;
}
.sr-item { display: block; padding: 8px 10px; border-radius: var(--r-s); color: var(--texto); }
.sr-item:hover, .sr-item.activo { background: var(--panel-2); text-decoration: none; }
.sr-item b { color: var(--naranja); }
.sr-tag {
  font-size: .68rem; text-transform: uppercase; letter-spacing: .06em;
  color: var(--texto-3); border: 1px solid var(--borde);
  padding: 1px 6px; border-radius: 20px; margin-right: 8px;
}
.sr-vacio { padding: 14px; color: var(--texto-3); text-align: center; }

.topbar-right { display: flex; align-items: center; gap: 10px; margin-left: auto; }

.icon-btn {
  width: 38px; height: 38px; border-radius: 10px;
  border: 1px solid var(--borde); background: var(--panel);
  color: var(--texto); font-size: 1rem; cursor: pointer;
  display: grid; place-items: center;
}
.icon-btn:hover { border-color: var(--naranja); }

.ring-wrap { position: relative; width: 40px; height: 40px; flex-shrink: 0; }
.ring { width: 40px; height: 40px; transform: rotate(-90deg); }
.ring circle { fill: none; stroke-width: 4; }
.ring-bg { stroke: var(--borde); }
.ring-fg {
  stroke: var(--naranja); stroke-linecap: round;
  stroke-dasharray: 100.5; stroke-dashoffset: 100.5;
  transition: stroke-dashoffset .6s ease;
}
.ring-label {
  position: absolute; inset: 0; display: grid; place-items: center;
  font-size: .6rem; font-weight: 700; color: var(--texto-2);
}

/* ================= LAYOUT ================= */
.layout { display: flex; align-items: flex-start; }

.sidebar {
  width: var(--sidebar-w); flex-shrink: 0;
  position: sticky; top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  overflow-y: auto;
  border-right: 1px solid var(--borde);
  background: var(--bg-2);
  display: flex; flex-direction: column; justify-content: space-between;
  padding: 14px 12px;
}
.nav { display: flex; flex-direction: column; gap: 2px; }
.nav-title {
  margin: 18px 0 6px; padding: 0 10px;
  font-size: .68rem; text-transform: uppercase; letter-spacing: .1em;
  color: var(--texto-3); font-weight: 700;
}
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px; border-radius: var(--r-s);
  color: var(--texto-2); font-size: .9rem;
}
.nav-item:hover { background: var(--panel); color: var(--texto); text-decoration: none; }
.nav-item.activo { background: var(--panel); color: var(--texto); box-shadow: inset 3px 0 0 var(--naranja); }
.nav-ico { width: 18px; text-align: center; }

.nav-mod { display: flex; align-items: center; gap: 10px; padding: 7px 10px; border-radius: var(--r-s); color: var(--texto-2); font-size: .875rem; }
.nav-mod:hover { background: var(--panel); color: var(--texto); text-decoration: none; }
.nav-mod.activo { background: var(--panel); color: var(--texto); box-shadow: inset 3px 0 0 var(--naranja); }
.nav-num {
  width: 22px; height: 22px; flex-shrink: 0; border-radius: 7px;
  display: grid; place-items: center; font-size: .7rem; font-weight: 700;
  background: var(--panel-2); border: 1px solid var(--borde); color: var(--texto-2);
}
.nav-mod.completo .nav-num { background: var(--ok-bg); border-color: var(--ok); color: var(--ok); }
.nav-mod-txt { flex: 1; min-width: 0; }
.nav-mod-txt span { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nav-mini-bar { height: 3px; border-radius: 3px; background: var(--borde); margin-top: 4px; overflow: hidden; }
.nav-mini-bar i { display: block; height: 100%; background: var(--naranja); border-radius: 3px; transition: width .4s; }

.sidebar-foot { padding: 10px; border-top: 1px solid var(--borde); margin-top: 16px; }
.tiny { font-size: .72rem; color: var(--texto-3); margin: 8px 0 0; }

.main {
  flex: 1; min-width: 0;
  padding: 28px clamp(16px, 4vw, 48px) 90px;
  max-width: 1080px;
  margin: 0 auto;
}
.main:focus { outline: none; }

.backdrop {
  position: fixed; inset: 0; background: rgba(0, 0, 0, .5);
  z-index: 55; display: none;
}
.only-mobile { display: none; }

/* ================= COMPONENTES ================= */
.card {
  background: var(--panel); border: 1px solid var(--borde);
  border-radius: var(--r-l); padding: 20px 22px; margin-bottom: 18px;
}
.card-tight { padding: 14px 16px; }

.grid { display: grid; gap: 14px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 18px; border-radius: 10px; border: 1px solid transparent;
  font-family: inherit; font-size: .9rem; font-weight: 600;
  cursor: pointer; background: var(--naranja); color: #1b1300;
  transition: transform .08s, filter .15s;
}
.btn:hover { filter: brightness(1.07); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn[disabled] { opacity: .45; cursor: not-allowed; }
.btn-sec { background: var(--panel-2); color: var(--texto); border-color: var(--borde); }
.btn-ghost { background: transparent; color: var(--texto-2); border-color: var(--borde); }
.btn-ghost:hover { color: var(--texto); border-color: var(--naranja); }
.btn-sm { padding: 6px 12px; font-size: .8rem; }
.btn-block { width: 100%; }

.chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: .74rem; font-weight: 600; padding: 3px 10px;
  border-radius: 20px; background: var(--panel-2);
  border: 1px solid var(--borde); color: var(--texto-2);
}
.chip-ok { background: var(--ok-bg); border-color: var(--ok); color: var(--ok); }
.chip-warn { background: var(--warn-bg); border-color: var(--warn); color: var(--warn); }
.chip-info { background: var(--info-bg); border-color: var(--info); color: var(--info); }
.chip-mal { background: var(--mal-bg); border-color: var(--mal); color: var(--mal); }

.bar { height: 8px; border-radius: 8px; background: var(--bg-2); border: 1px solid var(--borde); overflow: hidden; }
.bar i { display: block; height: 100%; background: linear-gradient(90deg, var(--naranja), var(--naranja-suave)); transition: width .5s; }

.migas { display: flex; align-items: center; gap: 8px; font-size: .8rem; color: var(--texto-3); margin-bottom: 12px; flex-wrap: wrap; }
.migas a { color: var(--texto-2); }

/* --- Portada --- */
.hero {
  background:
    radial-gradient(900px 300px at 12% -20%, rgba(255, 153, 0, .22), transparent),
    linear-gradient(160deg, var(--panel), var(--panel-2));
  border: 1px solid var(--borde); border-radius: 22px;
  padding: 34px clamp(20px, 4vw, 40px); margin-bottom: 22px;
}
.hero h1 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); margin-bottom: .35em; }
.hero p { color: var(--texto-2); max-width: 70ch; }
.hero-acciones { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }

.stat { background: var(--panel); border: 1px solid var(--borde); border-radius: var(--r-m); padding: 14px 16px; }
.stat-num { font-size: 1.6rem; font-weight: 800; line-height: 1.1; }
.stat-lbl { font-size: .76rem; color: var(--texto-3); text-transform: uppercase; letter-spacing: .06em; }

/* --- Tarjeta de módulo --- */
.mod-card {
  display: flex; flex-direction: column; gap: 10px;
  background: var(--panel); border: 1px solid var(--borde);
  border-radius: var(--r-l); padding: 18px; color: inherit;
  transition: transform .15s, border-color .15s;
}
.mod-card:hover { transform: translateY(-3px); border-color: var(--naranja); text-decoration: none; }
.mod-card-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.mod-sem { font-size: .7rem; text-transform: uppercase; letter-spacing: .1em; color: var(--naranja); font-weight: 700; }
.mod-card h3 { margin: 0; font-size: 1.02rem; }
.mod-card p { margin: 0; font-size: .85rem; color: var(--texto-2); }
.mod-card-foot { display: flex; align-items: center; gap: 8px; font-size: .74rem; color: var(--texto-3); margin-top: auto; }

/* --- Bloques de lección --- */
.leccion { border: 1px solid var(--borde); border-radius: var(--r-l); background: var(--panel); margin-bottom: 12px; overflow: hidden; }
.leccion-head {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 18px; cursor: pointer; user-select: none;
}
.leccion-head:hover { background: var(--panel-2); }
.leccion-head h3 { margin: 0; font-size: 1rem; flex: 1; }
.leccion-flecha { color: var(--texto-3); transition: transform .2s; }
.leccion.abierta .leccion-flecha { transform: rotate(90deg); }
.leccion-body { display: none; padding: 4px 22px 20px; border-top: 1px solid var(--borde); }
.leccion.abierta .leccion-body { display: block; animation: aparece .25s ease; }
.leccion-check {
  width: 22px; height: 22px; border-radius: 50%; flex-shrink: 0;
  border: 2px solid var(--borde); background: transparent;
  display: grid; place-items: center; cursor: pointer;
  font-size: .7rem; color: transparent; padding: 0;
}
.leccion-check.hecho { border-color: var(--ok); background: var(--ok); color: #06281c; }
.leccion-min { font-size: .72rem; color: var(--texto-3); flex-shrink: 0; }

@keyframes aparece { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: none; } }

.callout {
  border-radius: var(--r-m); padding: 12px 16px; margin: 0 0 14px;
  border-left: 3px solid var(--info); background: var(--info-bg);
  font-size: .92rem;
}
.callout p:last-child { margin-bottom: 0; }
.callout-titulo { font-weight: 700; display: block; margin-bottom: 2px; }
.callout.tip { border-color: var(--ok); background: var(--ok-bg); }
.callout.alerta { border-color: var(--mal); background: var(--mal-bg); }
.callout.ojo { border-color: var(--warn); background: var(--warn-bg); }
.callout.analogia { border-color: var(--naranja); background: rgba(255, 153, 0, .1); }

/* --- Código --- */
.code-box { position: relative; margin: 0 0 16px; border: 1px solid var(--borde); border-radius: var(--r-m); overflow: hidden; background: var(--bg-2); }
.code-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 10px 6px 14px; background: var(--panel-2);
  border-bottom: 1px solid var(--borde);
  font-size: .72rem; color: var(--texto-3); text-transform: uppercase; letter-spacing: .08em;
}
.code-box pre { margin: 0; padding: 14px 16px; overflow-x: auto; }
.code-box code {
  background: none; border: none; padding: 0; white-space: pre;
  font-size: .82rem; color: var(--texto); line-height: 1.6;
}
.tk-kw { color: #ff7bd5; font-weight: 600; }
.tk-str { color: #8fe388; }
.tk-num { color: #f7c67f; }
.tk-com { color: var(--texto-3); font-style: italic; }
.tk-fn { color: #6bc7ff; }
html[data-theme="light"] .tk-kw { color: #a626a4; }
html[data-theme="light"] .tk-str { color: #0a7d34; }
html[data-theme="light"] .tk-num { color: #b45309; }
html[data-theme="light"] .tk-fn { color: #0550ae; }

.pre-plano {
  font-family: var(--mono); font-size: .8rem; line-height: 1.55;
  background: var(--bg-2); border: 1px solid var(--borde); border-radius: var(--r-m);
  padding: 14px 16px; overflow-x: auto; margin: 0 0 16px; color: var(--texto-2);
}

/* --- Tabla --- */
.tabla-wrap { overflow-x: auto; margin-bottom: 16px; border: 1px solid var(--borde); border-radius: var(--r-m); }
table { border-collapse: collapse; width: 100%; font-size: .86rem; }
th, td { padding: 9px 13px; text-align: left; border-bottom: 1px solid var(--borde); vertical-align: top; }
th { background: var(--panel-2); font-size: .75rem; text-transform: uppercase; letter-spacing: .05em; color: var(--texto-2); }
tbody tr:last-child td { border-bottom: none; }

/* --- Pasos --- */
.pasos { list-style: none; padding: 0; counter-reset: paso; margin-bottom: 16px; }
.pasos li { counter-increment: paso; position: relative; padding-left: 38px; margin-bottom: 12px; }
.pasos li::before {
  content: counter(paso); position: absolute; left: 0; top: 0;
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--panel-2); border: 1px solid var(--borde);
  display: grid; place-items: center; font-size: .78rem; font-weight: 700; color: var(--naranja);
}

/* --- Término del glosario --- */
.term {
  border-bottom: 1px dashed var(--naranja); color: inherit;
  cursor: help; font-weight: 600;
}
.term:hover { background: rgba(255, 153, 0, .12); }

.tooltip-term {
  position: absolute; z-index: 90; max-width: 340px;
  background: var(--panel); border: 1px solid var(--naranja);
  border-radius: var(--r-m); padding: 12px 14px; box-shadow: var(--sombra);
  font-size: .85rem; line-height: 1.55;
}
.tooltip-term h4 { margin: 0 0 4px; font-size: .92rem; color: var(--naranja); }
.tooltip-term p { margin: 0 0 6px; color: var(--texto-2); }
.tooltip-term p:last-child { margin: 0; }
.tooltip-term .tt-ej { font-size: .8rem; color: var(--texto-3); border-top: 1px dashed var(--borde); padding-top: 6px; }

/* ================= TESTS ================= */
.test-cards { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
.test-card {
  border: 1px solid var(--borde); border-radius: var(--r-l);
  padding: 18px; background: var(--panel); display: flex; flex-direction: column; gap: 8px;
}
.test-card.bloqueado { opacity: .72; }
.test-card h4 { margin: 0; font-size: 1rem; display: flex; align-items: center; gap: 8px; }
.test-card p { font-size: .82rem; color: var(--texto-2); margin: 0; flex: 1; }
.nivel-punto { width: 10px; height: 10px; border-radius: 50%; }
.n-basico { background: var(--ok); }
.n-intermedio { background: var(--warn); }
.n-avanzado { background: var(--mal); }

.quiz-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; flex-wrap: wrap; margin-bottom: 8px;
}
.quiz-progreso { font-size: .8rem; color: var(--texto-3); }
.pregunta { font-size: 1.12rem; font-weight: 600; margin: 6px 0 18px; line-height: 1.45; }
.opciones { display: flex; flex-direction: column; gap: 10px; margin-bottom: 18px; }
.opcion {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 13px 16px; border: 1px solid var(--borde); border-radius: var(--r-m);
  background: var(--panel-2); cursor: pointer; text-align: left;
  font-family: inherit; font-size: .93rem; color: var(--texto);
  transition: border-color .12s, background .12s;
}
.opcion:hover:not(.desactivada) { border-color: var(--naranja); }
.opcion.marcada { border-color: var(--naranja); background: rgba(255, 153, 0, .1); }
.opcion.desactivada { cursor: default; }
.opcion.correcta { border-color: var(--ok); background: var(--ok-bg); }
.opcion.incorrecta { border-color: var(--mal); background: var(--mal-bg); }
.opcion-letra {
  width: 24px; height: 24px; flex-shrink: 0; border-radius: 7px;
  background: var(--bg-2); border: 1px solid var(--borde);
  display: grid; place-items: center; font-size: .76rem; font-weight: 700; color: var(--texto-2);
}
.opcion.correcta .opcion-letra { background: var(--ok); border-color: var(--ok); color: #06281c; }
.opcion.incorrecta .opcion-letra { background: var(--mal); border-color: var(--mal); color: #2b0606; }

.feedback { border-radius: var(--r-m); padding: 14px 16px; margin-bottom: 16px; font-size: .9rem; }
.feedback.bien { background: var(--ok-bg); border-left: 3px solid var(--ok); }
.feedback.mal { background: var(--mal-bg); border-left: 3px solid var(--mal); }
.feedback strong { display: block; margin-bottom: 4px; }

.quiz-foot { display: flex; gap: 10px; justify-content: flex-end; flex-wrap: wrap; }

.marcador { text-align: center; padding: 12px 0 4px; }
.marcador-num { font-size: 3.4rem; font-weight: 800; line-height: 1; }
.marcador-num.bien { color: var(--ok); }
.marcador-num.regular { color: var(--warn); }
.marcador-num.mal { color: var(--mal); }
.marcador p { color: var(--texto-2); }

.revision-item { border: 1px solid var(--borde); border-radius: var(--r-m); padding: 12px 14px; margin-bottom: 10px; font-size: .88rem; }
.revision-item.ok { border-left: 3px solid var(--ok); }
.revision-item.no { border-left: 3px solid var(--mal); }
.revision-item .ri-p { font-weight: 600; margin-bottom: 6px; }
.revision-item .ri-r { color: var(--texto-2); margin: 0; }

/* ================= GLOSARIO ================= */
.glos-filtros { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.filtro {
  padding: 6px 14px; border-radius: 20px; border: 1px solid var(--borde);
  background: var(--panel); color: var(--texto-2); font-size: .82rem;
  cursor: pointer; font-family: inherit;
}
.filtro.activo { background: var(--naranja); color: #1b1300; border-color: var(--naranja); font-weight: 600; }

.glos-item { border: 1px solid var(--borde); border-radius: var(--r-m); padding: 14px 16px; background: var(--panel); }
.glos-item h3 { margin: 0 0 2px; font-size: .98rem; }
.glos-item .glos-cat { font-size: .68rem; text-transform: uppercase; letter-spacing: .08em; color: var(--naranja); font-weight: 700; }
.glos-item p { margin: 6px 0 0; font-size: .87rem; color: var(--texto-2); }
.glos-item .glos-ej { font-size: .82rem; color: var(--texto-3); margin-top: 8px; border-top: 1px dashed var(--borde); padding-top: 8px; }

/* ================= AVISOS ================= */
.toast-zone { position: fixed; bottom: 20px; right: 20px; z-index: 100; display: flex; flex-direction: column; gap: 8px; }
.toast {
  background: var(--panel); border: 1px solid var(--borde); border-left: 3px solid var(--naranja);
  border-radius: var(--r-m); padding: 12px 16px; box-shadow: var(--sombra);
  font-size: .87rem; max-width: 320px; animation: entra .25s ease;
}
@keyframes entra { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: none; } }

.vacio { text-align: center; padding: 40px 20px; color: var(--texto-3); }

/* ================= RESPONSIVE ================= */
@media (max-width: 900px) {
  .only-mobile { display: grid; }
  .brand-text { display: none; }
  .sidebar {
    position: fixed; top: var(--topbar-h); left: 0; z-index: 58;
    transform: translateX(-100%); transition: transform .22s ease;
    box-shadow: var(--sombra);
  }
  body.menu-abierto .sidebar { transform: none; }
  body.menu-abierto .backdrop { display: block; }
  .main { padding: 20px 16px 80px; }
  .search-wrap { max-width: none; }
}

@media (max-width: 620px) {
  body { font-size: 15px; }
  .search-wrap { display: none; }
  .card { padding: 16px; border-radius: var(--r-m); }
  .hero { padding: 24px 18px; }
  .quiz-foot .btn { flex: 1; }
}

@media print {
  .topbar, .sidebar, .toast-zone { display: none; }
  .main { max-width: none; }
}