/*
 * base.css
 * ------------------------------------------------------------
 * Fundaciones globales: design tokens, reset, tipografía.
 * Cargar ANTES que layout, components y admin.
 *
 * Estilo: monocromo refinado. Inspirado en Linear/Vercel/Stripe.
 * Cambiar --color-accent para sumar marca; el resto se adapta.
 * ------------------------------------------------------------
 */

:root {
    /* Texto — escala neutra cálida */
    --color-text:           #0f0f10;
    --color-text-strong:    #000000;
    --color-text-muted:     #6b6b73;
    --color-text-subtle:    #a3a3ab;

    /* Fondos */
    --color-bg:             #ffffff;
    --color-bg-alt:         #fafafa;
    --color-bg-hover:       #f5f5f5;
    --color-bg-app:         #f7f7f8;

    /* Bordes */
    --color-border:         #ececef;
    --color-border-strong:  #d8d8de;

    /* Marca / acento (placeholder: monocromo) */
    --color-primary:        #0f0f10;
    --color-primary-hover:  #000000;
    --color-primary-text:   #ffffff;
    --color-accent:         #0f0f10;       /* aliasable */
    --color-accent-soft:    #f5f5f5;

    /* Estados */
    --color-success:        #15803d;
    --color-success-soft:   #f0fdf4;
    --color-warn:           #b45309;
    --color-warn-soft:      #fffbeb;
    --color-danger:         #b91c1c;
    --color-danger-soft:    #fef2f2;

    /* Tipografía */
    --font-family:        "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
    --font-family-mono:   ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
    --font-size-base:     15px;
    --line-height-base:   1.6;
    --font-feature:       "cv11", "ss01", "ss03";
    --font-numeric:       tabular-nums;

    /* Accesibilidad: factor global de escala de tipografía. Lo modifica el
       widget .a11y-fab (componente public_a11y.php) y se aplica vía html
       font-size, por lo que todos los tamaños en rem se escalan. */
    --a11y-scale:         1;

    /* Espaciado */
    --space-xs:  0.25rem;
    --space-sm:  0.5rem;
    --space-md:  1rem;
    --space-lg:  1.5rem;
    --space-xl:  2.5rem;
    --space-2xl: 4rem;

    /* Sizing */
    --container-max: 1040px;
    --radius-sm:     6px;
    --radius:        8px;
    --radius-lg:     12px;
    --radius-xl:     16px;

    /* Elevación */
    --shadow-xs: 0 1px 0 rgba(15,15,16,0.02);
    --shadow-sm: 0 1px 2px rgba(15,15,16,0.04), 0 1px 1px rgba(15,15,16,0.02);
    --shadow-md: 0 4px 12px -2px rgba(15,15,16,0.06), 0 2px 4px -2px rgba(15,15,16,0.04);
    --shadow-lg: 0 12px 32px -8px rgba(15,15,16,0.1),  0 4px 12px -4px rgba(15,15,16,0.06);

    /* Focus ring (accesible y elegante) */
    --ring:        0 0 0 3px rgba(15,15,16,0.08);
    --ring-strong: 0 0 0 3px rgba(15,15,16,0.16);

    /* Motion */
    --transition:        150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow:   250ms cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out-quart:    cubic-bezier(0.25, 1, 0.5, 1);
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ==========================================================
   Reset
   ========================================================== */
*, *::before, *::after { box-sizing: border-box; }

html {
    -webkit-text-size-adjust: 100%;
    font-size: calc(var(--font-size-base) * var(--a11y-scale, 1));
}

body {
    margin: 0;
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: var(--line-height-base);
    font-feature-settings: var(--font-feature);
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

img, video, svg { max-width: 100%; height: auto; }

::selection {
    background: var(--color-text);
    color: var(--color-primary-text);
}

/* ==========================================================
   Tipografía
   ========================================================== */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    margin: 0 0 var(--space-md);
    font-weight: 600;
    letter-spacing: -0.015em;
    color: var(--color-text);
}

h1 { font-size: 1.875rem; letter-spacing: -0.025em; font-weight: 600; }
h2 { font-size: 1.375rem; letter-spacing: -0.02em; }
h3 { font-size: 1.05rem; letter-spacing: -0.01em; }
h4 { font-size: 0.95rem; }

p { margin: 0 0 var(--space-md); }

a {
    color: var(--color-text);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-decoration-color: var(--color-border-strong);
    text-underline-offset: 0.22em;
    transition: color var(--transition), text-decoration-color var(--transition);
}
a:hover {
    color: var(--color-text);
    text-decoration-color: var(--color-text);
}

small {
    font-size: 0.85em;
    color: var(--color-text-muted);
}

code {
    font-family: var(--font-family-mono);
    font-size: 0.88em;
    background: var(--color-bg-hover);
    padding: 0.12em 0.4em;
    border-radius: 4px;
    color: var(--color-text);
}

pre {
    font-family: var(--font-family-mono);
    font-size: 0.88rem;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: var(--space-md);
    overflow-x: auto;
    margin: 0 0 var(--space-md);
    white-space: pre-wrap;
    line-height: 1.5;
}

hr {
    border: 0;
    border-top: 1px solid var(--color-border);
    margin: var(--space-lg) 0;
}

/* ==========================================================
   Utilities
   ========================================================== */
.text-muted    { color: var(--color-text-muted); }
.text-subtle   { color: var(--color-text-subtle); }
.text-tabular  { font-variant-numeric: tabular-nums; }
.visually-hidden {
    position: absolute; width: 1px; height: 1px;
    padding: 0; margin: -1px; overflow: hidden;
    clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

/* ==========================================================
   Accesibilidad: control flotante de tamaño de texto
   Pildora con A−, A (reset), A+. Modifica --a11y-scale en :root.
   ========================================================== */
.a11y-fab {
    position: fixed;
    right: 14px;
    bottom: 14px;
    z-index: 9000;
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 5px;
    background: var(--color-primary, #0f0f10);
    color: var(--color-primary-text, #fff);
    border-radius: 999px;
    box-shadow: 0 6px 24px rgba(0,0,0,0.18), 0 2px 6px rgba(0,0,0,0.12);
    font-family: var(--font-family);
    line-height: 1;
    /* No depende de --a11y-scale: el propio widget no debe agrandarse. */
    font-size: 14px;
}
.a11y-fab__btn {
    appearance: none;
    border: 0;
    background: transparent;
    color: inherit;
    width: 34px;
    height: 34px;
    border-radius: 999px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    padding: 0;
    transition: background 150ms ease;
}
.a11y-fab__btn:hover { background: rgba(255,255,255,0.15); }
.a11y-fab__btn:focus-visible {
    outline: 2px solid #fff;
    outline-offset: 2px;
    background: rgba(255,255,255,0.15);
}
.a11y-fab__btn[disabled] { opacity: 0.4; cursor: not-allowed; }
.a11y-fab__btn--minus { font-size: 12px; }
.a11y-fab__btn--reset { font-size: 14px; }
.a11y-fab__btn--plus  { font-size: 17px; }

/* No tapar el drawer móvil ni el botón de WhatsApp/topbar al imprimir. */
body.nav-open .a11y-fab { display: none; }
@media print { .a11y-fab { display: none; } }