:root {
    color-scheme: dark;
    --fondo: #071422;
    --fondo-2: #0b1c2e;
    --panel: #10263c;
    --panel-2: #16324d;
    --borde: rgba(46, 230, 166, 0.22);
    --texto: #e8f1f8;
    --muted: #93adc4;
    --acento: #2ee6a6;
    --acento-2: #38bdf8;
    --aviso: #fbbf24;
    --peligro: #f87171;
    --sombra: 0 18px 50px rgba(0, 0, 0, 0.35);
    --radio: 18px;
    --fuente: "Segoe UI", system-ui, sans-serif;
    --mono: "Cascadia Code", "Fira Code", Consolas, monospace;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--fuente);
    background:
        radial-gradient(circle at 12% 8%, rgba(46, 230, 166, 0.12), transparent 28%),
        radial-gradient(circle at 88% 0%, rgba(56, 189, 248, 0.12), transparent 32%),
        linear-gradient(160deg, var(--fondo), var(--fondo-2) 55%, #0a1828);
    color: var(--texto);
    line-height: 1.6;
}

a {
    color: var(--acento-2);
    text-decoration: none;
}

a:hover {
    color: var(--acento);
}

.envoltorio {
    width: min(1180px, calc(100% - 2rem));
    margin: 0 auto;
    padding: 1.2rem 0 3rem;
}

.cabecera {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: flex-start;
    margin-bottom: 1.2rem;
}

.marca {
    display: flex;
    gap: 0.9rem;
    align-items: center;
}

.marca svg {
    width: 52px;
    height: 52px;
    flex-shrink: 0;
}

.marca h1 {
    margin: 0;
    font-size: clamp(1.4rem, 3vw, 2.1rem);
    letter-spacing: 0.04em;
}

.marca p {
    margin: 0.15rem 0 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.acciones-cabecera {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.boton,
.boton-tema,
.boton-copiar {
    border: 1px solid var(--borde);
    background: rgba(16, 38, 60, 0.8);
    color: var(--texto);
    border-radius: 999px;
    padding: 0.45rem 0.9rem;
    cursor: pointer;
    font: inherit;
    font-size: 0.85rem;
}

.boton:hover,
.boton-tema:hover,
.boton-copiar:hover,
.nav-enlace:hover,
.nav-enlace.activo {
    border-color: var(--acento);
    color: var(--acento);
    background: rgba(46, 230, 166, 0.1);
}

.nav-principal {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    margin: 0 0 1.3rem;
}

.nav-enlace {
    padding: 0.55rem 0.85rem;
    border-radius: 12px;
    border: 1px solid transparent;
    color: var(--texto);
    background: rgba(16, 38, 60, 0.55);
    font-size: 0.88rem;
}

.panel {
    background: rgba(16, 38, 60, 0.78);
    border: 1px solid var(--borde);
    border-radius: var(--radio);
    padding: 1.3rem 1.4rem;
    box-shadow: var(--sombra);
    margin-bottom: 1.1rem;
}

.rejilla {
    display: grid;
    gap: 1rem;
}

.rejilla-2 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.rejilla-3 {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.tarjeta {
    background: var(--panel-2);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 16px;
    padding: 1rem 1.1rem;
}

.tarjeta h3,
.panel h2 {
    margin: 0 0 0.55rem;
    color: var(--acento);
}

.etiqueta {
    display: inline-block;
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--acento);
    border: 1px solid var(--borde);
    border-radius: 999px;
    padding: 0.15rem 0.55rem;
    margin-bottom: 0.5rem;
}

.lista-limpia {
    margin: 0;
    padding-left: 1.1rem;
}

.lista-limpia li {
    margin: 0.25rem 0;
}

.aviso,
.nota,
.peligro {
    border-radius: 12px;
    padding: 0.85rem 1rem;
    margin: 0.9rem 0;
}

.aviso {
    background: rgba(251, 191, 36, 0.12);
    border: 1px solid rgba(251, 191, 36, 0.35);
}

.nota {
    background: rgba(56, 189, 248, 0.1);
    border: 1px solid rgba(56, 189, 248, 0.3);
}

.peligro {
    background: rgba(248, 113, 113, 0.1);
    border: 1px solid rgba(248, 113, 113, 0.35);
}

.bloque-codigo {
    position: relative;
    margin: 0.9rem 0;
    border: 1px solid var(--borde);
    border-radius: 12px;
    background: #071018;
    overflow: auto;
}

.bloque-codigo pre {
    margin: 0;
    padding: 1rem 1.1rem 1.1rem;
    font-family: var(--mono);
    font-size: 0.84rem;
    line-height: 1.5;
    white-space: pre-wrap;
}

.boton-copiar {
    position: absolute;
    top: 8px;
    right: 8px;
    z-index: 1;
}

.tabla-envoltorio {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
}

th,
td {
    border: 1px solid rgba(46, 230, 166, 0.18);
    padding: 0.65rem 0.7rem;
    vertical-align: top;
    text-align: left;
}

th {
    background: rgba(46, 230, 166, 0.12);
    color: var(--acento);
}

tr:nth-child(even) td {
    background: rgba(255, 255, 255, 0.02);
}

.svg-figura {
    width: 100%;
    height: auto;
    display: block;
    background: #071018;
    border-radius: 14px;
    border: 1px solid var(--borde);
}

.pasos {
    counter-reset: paso;
    list-style: none;
    padding: 0;
    margin: 0;
}

.pasos li {
    counter-increment: paso;
    margin: 0.7rem 0;
    padding-left: 2.4rem;
    position: relative;
}

.pasos li::before {
    content: counter(paso);
    position: absolute;
    left: 0;
    top: 0;
    width: 1.7rem;
    height: 1.7rem;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: rgba(46, 230, 166, 0.15);
    color: var(--acento);
    font-size: 0.8rem;
}

.pregunta {
    margin: 0.8rem 0 1.1rem;
}

.pregunta label {
    display: block;
    margin: 0.25rem 0;
    cursor: pointer;
}

.resultado-quiz {
    font-weight: 700;
    color: var(--acento);
}

.formulario {
    display: grid;
    gap: 0.7rem;
}

.formulario input,
.formulario textarea,
.formulario select {
    width: 100%;
    padding: 0.65rem 0.75rem;
    border-radius: 10px;
    border: 1px solid var(--borde);
    background: #071018;
    color: var(--texto);
    font: inherit;
}

.indicadores {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 0.8rem;
}

.indicador b {
    display: block;
    font-size: 1.6rem;
    color: var(--acento);
}

.pie {
    color: var(--muted);
    text-align: center;
    font-size: 0.85rem;
    margin-top: 1.5rem;
}

body.tema-claro {
    color-scheme: light;
    --fondo: #e8f4f1;
    --fondo-2: #d5e8f3;
    --panel: #ffffff;
    --panel-2: #f4fbf8;
    --borde: rgba(13, 92, 78, 0.2);
    --texto: #123041;
    --muted: #4b6576;
    --sombra: 0 10px 30px rgba(16, 50, 70, 0.12);
}

body.tema-claro .bloque-codigo,
body.tema-claro .formulario input,
body.tema-claro .formulario textarea,
body.tema-claro .svg-figura {
    background: #0e1a22;
    color: #e8f1f8;
}

@media (max-width: 720px) {
    .cabecera {
        flex-direction: column;
    }

    .panel {
        padding: 1rem;
    }
}