/* COGNILAB - SISTEMA DE BOTONES (COLORES GLOBALES COHERENTES) */

/* Botones base */
.btn{
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--s2);
    padding: var(--s3) var(--s6);
    border-radius: var(--r2);
    font-weight: 600;
    font-size: var(--font-size-base);
    text-decoration: none;
    border: 1px solid rgba(255,255,255,0.12);
    cursor: pointer;
    transition:
        background var(--t1, 0.4s ease),
        border-color var(--t1, 0.4s ease),
        box-shadow var(--t1, 0.35s ease),
        transform var(--t1, 0.25s ease);
    will-change: transform, box-shadow, background, border-color;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

/* Efecto hover simple de color para botones */
.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0.06);
    opacity: 0;
    transition: opacity 0.25s ease;
    z-index: 1;
}

.btn:hover::before {
    opacity: 1;
}

/* Botones primarios */
.btn-primary{
    background: linear-gradient(135deg,
        color-mix(in oklab, var(--btn-azul-medio, #3B82F6) 30%, rgba(255,255,255,0.06)) 0%,
        color-mix(in oklab, var(--btn-indigo, #4F46E5) 22%, rgba(255,255,255,0.04)) 100%
    );
    color: var(--txt);
    box-shadow: 0 10px 28px rgba(0,0,0,0.35);
    border: 1px solid color-mix(in oklab, var(--btn-indigo, #4F46E5) 32%, rgba(255,255,255,0.18));
    -webkit-backdrop-filter: blur(10px) saturate(110%);
    backdrop-filter: blur(10px) saturate(110%);
}
/* Overlay simple para botones primarios */
.btn-primary::before {
    background: rgba(255,255,255,0.08);
}

.btn-primary:hover{
    border-color: rgba(255,255,255,0.28);
    box-shadow:
        0 8px 24px rgba(0,0,0,.38),
        0 0 0 1px rgba(255,255,255,.06) inset,
        0 0 0 3px color-mix(in oklab, var(--btn-indigo, #4F46E5) 22%, transparent);
}

/* Botones outline */
.btn-outline{
    background: transparent;
    color: var(--txt);
    border: 1px solid rgba(255,255,255,.22);
    box-shadow: none;
}
/* Overlay simple para botones outline */
.btn-outline::before {
    background: rgba(255,255,255,0.05);
}

.btn-outline:hover{
    border-color: rgba(255,255,255,0.34);
    box-shadow:
        0 6px 18px rgba(0,0,0,.35),
        0 0 0 3px color-mix(in oklab, var(--btn-azul-medio, #3B82F6) 18%, transparent);
}

/* Tamaños */
.btn-sm{
    padding: var(--s2) var(--s4);
    font-size: .875rem;
}
.btn-primary:not(.btn-sm){
    padding: var(--s4) var(--s8);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--r4);
}

/* Botones de autenticación */
.auth-btn{
    width: 100% !important;
    padding: 12px 24px !important;
    background: linear-gradient(135deg, rgba(7,7,10,.56), rgba(7,7,10,.38)) !important;
    color: var(--txt) !important;
    border: 1px solid rgba(255,255,255,0.12) !important;
    border-radius: var(--r2) !important;
    font-weight: 600 !important;
    font-size: var(--font-size-base) !important;
    font-family: var(--font-body, "Inter", sans-serif) !important;
    cursor: pointer !important;
    transition: background .35s ease, border-color .35s ease, box-shadow .35s ease, transform .25s ease !important;
    will-change: transform, box-shadow, background, border-color !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: var(--s2) !important;
}
.auth-btn:hover{
    background: linear-gradient(135deg, rgba(7,7,10,.64), rgba(7,7,10,.48)) !important;
    border-color: rgba(255,255,255,0.20) !important;
    box-shadow:
        0 8px 24px rgba(0,0,0,.38),
        0 0 0 1px rgba(255,255,255,.06) inset,
        0 0 0 3px color-mix(in oklab, var(--btn-azul-medio, #3B82F6) 16%, transparent) !important;
    transform: translateY(-1px) !important;
}

/* Estados de botones */
.btn:disabled{
    opacity: 0.6;
    cursor: not-allowed;
}
.btn:focus{
    outline: 2px solid var(--btn-magenta-oscuro);
    outline-offset: 2px;
}

/* Responsive */
@media(max-width: 480px){
    .btn{
        padding: var(--s2) var(--s4);
        font-size: 0.875rem;
    }
}

/* Botones dentro de tarjetas de plan: respetan el acento del plan */
.plan-card .btn-primary{
    background: linear-gradient(135deg,
        color-mix(in oklab, var(--accent, #4F46E5) 30%, rgba(255,255,255,0.06)) 0%,
        color-mix(in oklab, var(--accent, #4F46E5) 18%, rgba(255,255,255,0.04)) 100%
    );
    border: 1px solid color-mix(in oklab, var(--accent, #4F46E5) 42%, rgba(255,255,255,0.18));
    -webkit-backdrop-filter: blur(10px) saturate(110%);
    backdrop-filter: blur(10px) saturate(110%);
}
.plan-card .btn-primary:hover{
    background: linear-gradient(135deg,
        color-mix(in oklab, var(--accent, #4F46E5) 36%, rgba(255,255,255,0.07)) 0%,
        color-mix(in oklab, var(--accent, #4F46E5) 24%, rgba(255,255,255,0.05)) 100%
    );
    border-color: color-mix(in oklab, var(--accent, #4F46E5) 54%, rgba(255,255,255,0.22));
    box-shadow:
        0 8px 24px rgba(0,0,0,.38),
        0 0 0 1px rgba(255,255,255,.06) inset,
        0 0 0 3px color-mix(in oklab, var(--accent, #4F46E5) 22%, transparent);
}