/* =========================================================
   KEOTEACH · KEO BRAIN
   Usa las variables de style.css (oscuro y claro). Se enlaza después de style.css.
========================================================= */

.is-guest .brain-home {
    display: none;
}

.brain-home {
    margin-top: 6px;
}

.brain-stats {
    display: grid;
    grid-template-columns: auto minmax(220px, 1fr);
    gap: 14px 24px;
    align-items: center;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: linear-gradient(145deg, var(--surface), var(--surface-2));
}

.brain-stats:empty {
    display: none;
}

.brain-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.brain-chip {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 6px 12px;
    border: 1px solid var(--border);
    border-radius: 100px;
    background: var(--surface-3);
    color: var(--text);
    font-size: 13px;
    font-weight: 700;
    white-space: nowrap;
}

.brain-chip.streak i { color: var(--orange); }
.brain-chip.level i { color: var(--primary-2); }
.brain-chip.stars i { color: var(--yellow); }

.brain-xp-head {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 6px;
    color: var(--text-soft);
    font-size: 12.5px;
}

.brain-xp-head strong {
    color: var(--text);
}

.brain-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 14px;
    margin-top: 14px;
    align-items: start;
}

.brain-today {
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-height: 220px;
    border-color: rgba(118, 103, 255, .3);
    background:
        radial-gradient(circle at 100% 0%, rgba(118, 103, 255, .10), transparent 45%),
        linear-gradient(145deg, var(--surface), var(--surface-2));
}

.brain-topic {
    margin: 0;
    font-family: var(--font-display);
    font-size: clamp(20px, 2.4vw, 26px);
    line-height: 1.2;
    overflow-wrap: anywhere;
}

.brain-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
}

.brain-minutes {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-soft);
    font-size: 13px;
    font-weight: 600;
}

.brain-reason {
    margin: 0;
    color: var(--text-soft);
    font-size: 14px;
    line-height: 1.6;
}

.brain-warn {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
    padding: 8px 12px;
    border: 1px solid rgba(255, 157, 92, .4);
    border-radius: 10px;
    background: rgba(255, 157, 92, .08);
    color: var(--text);
    font-size: 13px;
}

.brain-warn i {
    color: var(--orange);
}

.brain-progress {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 10px;
}

.brain-progress small {
    color: var(--text-soft);
    font-weight: 700;
}

.brain-today > .btn {
    align-self: flex-start;
    margin-top: 4px;
}

.brain-empty {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
}

.brain-empty h3 {
    margin: 0;
    font-family: var(--font-display);
    font-size: 18px;
}

.brain-empty p {
    margin: 0;
    color: var(--text-soft);
    font-size: 14px;
}

/* Dificultad: color + icono + texto (nunca solo color) */

.diff-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 3px 10px;
    border: 1px solid currentColor;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 800;
    white-space: nowrap;
}

.diff-badge.diff-easy { color: var(--green); }
.diff-badge.diff-normal { color: var(--yellow); }
.diff-badge.diff-hard { color: var(--orange); }
.diff-badge.diff-expert { color: var(--pink); }

/* Panel lateral */

.brain-side {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.brain-goal,
.brain-week,
.brain-lock {
    display: flex;
    align-items: center;
    gap: 9px;
    margin: 0;
    color: var(--text-soft);
    font-size: 13.5px;
    line-height: 1.5;
}

.brain-goal i { color: var(--green); }
.brain-week i { color: var(--text-muted); }

.brain-lock {
    flex-wrap: wrap;
    padding: 10px 12px;
    border: 1px solid rgba(247, 201, 93, .3);
    border-radius: 10px;
    background: rgba(247, 201, 93, .06);
}

.brain-lock i {
    color: var(--yellow);
}

.brain-lock span {
    flex: 1 1 200px;
}

.brain-block h4 {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 0 8px;
    font-family: var(--font-display);
    font-size: 14px;
}

.brain-block h4 i {
    color: var(--primary-2);
}

.brain-list,
.brain-exam-list {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 6px;
}

.brain-list li,
.brain-exam-list li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 8px 11px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface-2);
    font-size: 13px;
}

.brain-list small,
.brain-exam-list small {
    display: block;
    color: var(--text-muted);
    font-size: 11.5px;
}

.brain-list li > span,
.brain-exam-list li > div:first-child {
    min-width: 0;
    overflow-wrap: anywhere;
}

.brain-exam-list .brain-none {
    justify-content: flex-start;
    border-style: dashed;
    color: var(--text-muted);
}

.brain-exam-actions {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

/* Formulario y plan (dentro de la ventana general) */

.brain-form-error {
    min-height: 18px;
    margin: 0;
    color: var(--red);
    font-size: 13px;
    font-weight: 600;
}

.brain-plan {
    margin: 12px 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 8px;
    max-height: 52vh;
    overflow-y: auto;
}

.brain-plan-day {
    display: grid;
    grid-template-columns: 130px minmax(0, 1fr);
    gap: 12px;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface-2);
}

.brain-plan-day.kind-simulation {
    border-color: rgba(255, 107, 131, .45);
}

.brain-plan-day.kind-review {
    border-color: rgba(67, 217, 255, .35);
}

.brain-plan-date strong {
    display: block;
    font-size: 13px;
}

.brain-plan-date small {
    color: var(--text-muted);
    font-size: 11.5px;
}

.brain-kind {
    display: inline-block;
    margin-bottom: 4px;
    color: var(--primary-2);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: .06em;
    text-transform: uppercase;
}

.brain-plan-body ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 4px;
}

.brain-plan-body li {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    overflow-wrap: anywhere;
}

/* Responsive */

@media (max-width: 900px) {
    .brain-grid,
    .brain-stats {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .brain-plan-day {
        grid-template-columns: 1fr;
        gap: 6px;
    }

    .brain-exam-list li {
        flex-direction: column;
        align-items: flex-start;
    }

    .brain-today > .btn {
        width: 100%;
    }
}