/* ============================================================
   PROBLEMAS QUE RESOLVEMOS — selector interactivo de síntomas
   ============================================================ */

.problems {
    background: var(--ink);
    color: var(--text-on-ink);
}

.problems-header {
    max-width: 600px;
    margin-bottom: 56px;
}

.problems-layout {
    display: grid;
    grid-template-columns: 0.85fr 1.15fr;
    gap: 48px;
    align-items: start;
}

.problem-chips {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.problem-chip {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 16px 20px;
    border: 1px solid var(--border-on-ink);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-on-ink-muted);
    font-family: var(--font-body);
    font-size: 0.96rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.problem-chip:hover {
    border-color: var(--border-on-ink);
    color: var(--text-on-ink);
    background: var(--ink-raised);
}

.problem-chip.active {
    border-color: var(--copper);
    color: var(--text-on-ink);
    background: var(--ink-raised);
}

.problem-chip .num {
    font-size: 0.78rem;
    color: var(--text-on-ink-dim);
}

.problem-chip.active .num { color: var(--copper-light); }

/* Panel de diagnóstico dinámico */
.problem-panel {
    background: var(--ink-raised);
    border: 1px solid var(--border-on-ink);
    border-radius: var(--radius-lg);
    padding: 40px;
    min-height: 360px;
    position: relative;
    overflow: hidden;
}

.problem-panel-content {
    display: none;
    flex-direction: column;
    gap: 22px;
}

.problem-panel-content.active {
    display: flex;
    animation: panelFade 0.4s var(--ease);
}

@keyframes panelFade {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

.problem-panel-tag {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--circuit);
}

.problem-panel h3 {
    font-family: var(--font-display);
    font-size: 1.9rem;
    font-weight: 400;
    color: var(--text-on-ink);
}

.problem-panel p {
    color: var(--text-on-ink-muted);
    margin: 0;
}

/* Barra de "lectura" — refuerza el lenguaje de diagnóstico */
.problem-gauge {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-top: 4px;
}

.problem-gauge-track {
    flex: 1;
    height: 6px;
    background: var(--border-on-ink);
    border-radius: 3px;
    overflow: hidden;
}

.problem-gauge-fill {
    height: 100%;
    background: var(--circuit);
    border-radius: 3px;
    width: 0%;
    transition: width 0.6s var(--ease) 0.1s;
}

.problem-panel-content.active .problem-gauge-fill { width: var(--fill, 50%); }

.problem-gauge-label {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-on-ink-dim);
    white-space: nowrap;
}

.problem-solution {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding-top: 18px;
    border-top: 1px solid var(--border-on-ink);
    margin-top: 4px;
}

.problem-solution-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--mint-dim);
    margin-top: 7px;
    flex-shrink: 0;
}

.problem-solution p { color: var(--text-on-ink); font-size: 0.94rem; }

@media (max-width: 860px) {
    .problems-layout { grid-template-columns: 1fr; gap: 28px; }
    .problem-panel { padding: 28px; min-height: auto; }
}