/* ==================================================================
   Machala GPS — Componentes reutilizables
   Botones, scroll-top y página de error.
   ================================================================== */

/* ---------- Botones ---------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.7rem 1.4rem;
    border: 0;
    border-radius: var(--radius-pill);
    font-size: 0.9375rem;
    font-weight: 700;
    text-decoration: none;
    white-space: nowrap;
    cursor: pointer;
    transition:
        transform var(--dur-fast) var(--ease-out),
        box-shadow var(--dur-fast) var(--ease-out),
        background-color var(--dur-fast) ease;
}

.btn:active {
    transform: scale(0.97);
}

/* CTA principal: amarillo corporativo con relieve clay */
.btn--cta {
    background-color: var(--c-yellow-400);
    color: var(--c-navy);
    box-shadow: var(--shadow-clay-yellow);
}

@media (hover: hover) and (pointer: fine) {
    .btn--cta:hover {
        background-color: var(--c-yellow-300);
        transform: translateY(-1px);
        box-shadow:
            0 10px 22px rgba(222, 156, 10, 0.38),
            inset 0 1.5px 0 rgba(255, 255, 255, 0.6),
            inset 0 -3px 6px rgba(160, 110, 0, 0.16);
    }

    .btn--cta:hover:active {
        transform: scale(0.97);
    }
}

/* Botón navy: acción principal sobre fondos claros */
.btn--navy {
    background-color: var(--c-navy);
    color: #ffffff;
    padding: 0.85rem 1.9rem;
    box-shadow:
        inset 0 1.5px 0 rgba(255, 255, 255, 0.14),
        0 10px 24px rgba(12, 27, 63, 0.28);
}

@media (hover: hover) and (pointer: fine) {
    .btn--navy:hover {
        background-color: var(--c-blue-800);
        transform: translateY(-1px);
    }
}

/* ---------- Botón flotante "volver arriba" ---------- */

.scroll-top {
    position: fixed;
    right: clamp(1rem, 3vw, 2rem);
    bottom: clamp(1rem, 3vw, 2rem);
    z-index: var(--z-scroll-top);
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    border: 0;
    border-radius: var(--radius-md);
    background-color: var(--c-surface);
    color: var(--c-navy);
    box-shadow: var(--shadow-clay-sm);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(14px) scale(0.9);
    transition:
        opacity var(--dur-base) var(--ease-out),
        transform var(--dur-base) var(--ease-out),
        color var(--dur-fast) ease,
        visibility 0s linear var(--dur-base);
}

.scroll-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: none;
    transition:
        opacity var(--dur-base) var(--ease-out),
        transform var(--dur-base) var(--ease-out),
        color var(--dur-fast) ease;
}

@media (hover: hover) and (pointer: fine) {
    .scroll-top.is-visible:hover {
        color: var(--c-blue-600);
        transform: translateY(-2px);
    }
}

.scroll-top.is-visible:active {
    transform: scale(0.92);
}

/* ---------- Página de error 404 ---------- */

.error-page {
    display: grid;
    place-items: center;
    min-height: 60vh;
    padding-block: clamp(3rem, 8vw, 5rem);
}

.error-page__inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    text-align: center;
}

.error-page__code {
    color: var(--c-blue-600);
    font-size: clamp(3.5rem, 10vw, 5.5rem);
    font-weight: 800;
    line-height: 1;
}

.error-page__title {
    font-size: clamp(1.5rem, 4vw, 2rem);
}

.error-page__text {
    margin-bottom: 1.25rem;
}