/* Hoja propia de la pantalla de login.
 *
 * No reutiliza style.css a propósito: esa hoja se sirve detrás de la puerta y
 * traerla aquí obligaría a abrirla a cualquiera. Son cien líneas; duplicar el
 * puñado de variables sale más barato que agujerear el control de acceso.
 *
 * Tampoco carga Google Fonts: la tipografía del sistema evita una petición a un
 * tercero antes de que nadie se haya identificado. */

:root {
    --bg-primary: #0b0f19;
    --bg-card: rgba(26, 31, 46, 0.72);
    --border-color: rgba(255, 255, 255, 0.08);
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --color-primary: #6366f1;
    --color-primary-light: #818cf8;
    --color-error: #ef4444;
    --radius-md: 12px;
    --radius-lg: 18px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 1.5rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Plus Jakarta Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
    font-size: 15px;
    line-height: 1.5;
    /* Los mismos halos del dashboard, sin necesitar su hoja ni sus elementos. */
    background-image:
        radial-gradient(60rem 40rem at 15% -10%, rgba(99, 102, 241, 0.18), transparent 60%),
        radial-gradient(50rem 35rem at 95% 110%, rgba(13, 148, 136, 0.15), transparent 60%);
}

.card {
    width: min(100%, 26rem);
    padding: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: 0 24px 60px -20px rgba(0, 0, 0, 0.75);
}

.brand { display: flex; align-items: center; gap: 0.85rem; margin-bottom: 1.75rem; }

.mark {
    display: grid;
    place-items: center;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: #fff;
}

.mark svg { width: 1.5rem; height: 1.5rem; }

h1 { font-size: 1.25rem; font-weight: 600; letter-spacing: -0.01em; }
.subtitle { font-size: 0.8rem; color: var(--text-secondary); }

label {
    display: block;
    margin-bottom: 0.4rem;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-secondary);
}

input[type="email"],
input[type="password"],
input[type="text"] {
    width: 100%;
    margin-bottom: 1.1rem;
    padding: 0.7rem 0.85rem;
    background: rgba(11, 15, 25, 0.7);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.18);
}

#code { letter-spacing: 0.25em; font-variant-numeric: tabular-nums; }

.hint { margin: -0.7rem 0 1.1rem; font-size: 0.75rem; color: var(--text-muted); }

.checkbox {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    margin-bottom: 1.4rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.checkbox input { width: 1rem; height: 1rem; accent-color: var(--color-primary); }

button {
    width: 100%;
    padding: 0.75rem;
    border: 0;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: #fff;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    transition: filter 0.2s ease, opacity 0.2s ease;
}

button:hover:not(:disabled) { filter: brightness(1.1); }
button:disabled { opacity: 0.6; cursor: progress; }

.error {
    margin-top: 1rem;
    padding: 0.7rem 0.85rem;
    border: 1px solid rgba(239, 68, 68, 0.35);
    border-radius: var(--radius-md);
    background: rgba(239, 68, 68, 0.1);
    color: #fca5a5;
    font-size: 0.85rem;
}

footer {
    margin-top: 1.75rem;
    padding-top: 1.15rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
}

:where(button, input):focus-visible {
    outline: 2px solid var(--color-primary-light);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    * { transition-duration: 0.001ms !important; }
}