:root {
    color-scheme: light;
    --color-fondo: #edf1f4;
    --color-superficie: #ffffff;
    --color-superficie-2: #f7f9fa;
    --color-borde: #d5dde3;
    --color-borde-fuerte: #b9c4cc;
    --color-texto: #17232d;
    --color-texto-suave: #64717b;
    --color-primario: #d97706;
    --color-primario-hover: #b45309;
    --color-primario-oscuro: #7c3d08;
    --color-error: #b42318;
    --color-error-fondo: #fff0ed;
    --color-exito: #16794a;
    --color-sidebar: #15222c;
    --color-sidebar-2: #1d2d38;
    --color-sidebar-texto: #dce5ea;
    --sombra-panel: 0 8px 24px rgba(22, 39, 52, .06);
    --radio: 10px;
    --espaciado: 16px;
    font-size: 15px;
}

* { box-sizing: border-box; }

html { min-width: 320px; background: var(--color-fondo); }

body {
    margin: 0;
    min-height: 100vh;
    font-family: Inter, "Segoe UI", Roboto, Arial, sans-serif;
    background-color: var(--color-fondo);
    background-image: linear-gradient(rgba(255,255,255,.4) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.4) 1px, transparent 1px);
    background-size: 28px 28px;
    color: var(--color-texto);
    line-height: 1.5;
}

button, input, select, textarea { font: inherit; }
button, a, input, select, textarea { -webkit-tap-highlight-color: transparent; }
a { color: var(--color-primario-oscuro); text-decoration: none; }
a:hover { color: var(--color-primario-hover); text-decoration: underline; }
::selection { color: #17232d; background: #f6c36b; }
:focus-visible { outline: 3px solid rgba(217,119,6,.35); outline-offset: 2px; }

h1, h2, h3 { color: var(--color-texto); line-height: 1.2; }
h2 { font-size: 1.12rem; margin: 0 0 14px; }
p { line-height: 1.6; }
small { color: var(--color-texto-suave); }

.contenedor-centrado {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(18px, 4vw, 48px);
    background: radial-gradient(ellipse at 50% 0%, rgba(217,119,6,.13), transparent 40%), #15222c;
}

.tarjeta {
    background: var(--color-superficie);
    border: 1px solid var(--color-borde);
    border-radius: var(--radio);
    padding: clamp(18px, 2vw, 26px);
    box-shadow: var(--sombra-panel);
}

.tarjeta--angosta { width: 100%; max-width: 440px; }
.titulo { margin: 0 0 6px; font-size: clamp(1.35rem, 2vw, 1.8rem); font-weight: 750; letter-spacing: -.035em; }
.subtitulo { margin: 0 0 22px; color: var(--color-texto-suave); font-size: .93rem; }

.contenedor-ancho { width: min(1180px, calc(100% - 40px)); margin: 36px auto; }
.encabezado {
    display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
    margin: 0 0 24px; padding: 0 0 16px; border-bottom: 1px solid var(--color-borde-fuerte);
}
.encabezado .titulo { margin: 0; }
.contenedor-ancho .encabezado > div, .contenedor-ancho .encabezado > nav { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; }
.contenedor-ancho .encabezado > div > a, .contenedor-ancho .encabezado > nav > a {
    display: inline-flex; align-items: center; min-height: 34px; color: #475965; font-size: .82rem; font-weight: 650;
}
.contenedor-ancho .encabezado > div > a:hover, .contenedor-ancho .encabezado > nav > a:hover { color: var(--color-primario-hover); }
.contenedor-ancho > .tarjeta { margin-bottom: 18px; }

.campo { margin-bottom: 15px; min-width: 0; }
.campo label { display: block; margin-bottom: 6px; color: #42515c; font-size: .78rem; font-weight: 700; letter-spacing: .035em; }
.campo input, .campo select, .campo textarea {
    width: 100%; min-height: 42px; padding: 9px 12px; border: 1px solid var(--color-borde-fuerte);
    border-radius: 6px; background: #fff; color: var(--color-texto); font-size: .94rem; transition: border-color .15s, box-shadow .15s;
}
.campo textarea { min-height: 100px; resize: vertical; }
.campo input::placeholder, .campo textarea::placeholder { color: #89949c; }
.campo input:focus, .campo select:focus, .campo textarea:focus { outline: none; border-color: var(--color-primario); box-shadow: 0 0 0 3px rgba(217,119,6,.14); }
.campo small { display: block; margin-top: 5px; font-size: .76rem; }

.mensaje-error { background: var(--color-error-fondo); color: var(--color-error); border: 1px solid #f3c0b9; padding: 10px 12px; border-radius: 7px; font-size: .86rem; margin-bottom: 14px; display: none; }
.mensaje-error.visible { display: block; }
.enlace-secundario { text-align: center; margin-top: 14px; font-size: .86rem; }

@media (max-width: 600px) {
    .contenedor-centrado { align-items: flex-start; padding: 22px 14px; }
    .tarjeta { padding: 18px; }
    .contenedor-ancho { width: calc(100% - 24px); margin: 20px auto; }
    .encabezado { align-items: flex-start; margin-bottom: 18px; }
}