/* ═══════════════════════════════════════════
   TrainControl — Footer
   ═══════════════════════════════════════════ */

.app-footer {
    height: var(--footer-h);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-footer);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-top: 1px solid var(--border-light);
    position: relative;
}

/* Add button */
.btn-add {
    position: absolute;
    left: var(--gap-lg);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--tc-blue);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-on-accent);
    box-shadow: 0 4px 14px rgba(67,89,144,0.35);
    transition: all var(--duration-fast) var(--ease-spring);
}
.btn-add:hover {
    transform: scale(1.08);
    box-shadow: 0 6px 20px rgba(67,89,144,0.4);
}
.btn-add:active {
    transform: scale(0.95);
}

/* Tabs */
.footer-tabs {
    display: flex;
    gap: var(--gap-xl);
}

.tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-tertiary);
    font-size: 0.7rem;
    font-weight: 500;
    font-family: var(--font-sans);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    transition: color var(--duration-fast) ease;
}
.tab:hover {
    color: var(--text-secondary);
}
.tab.active {
    color: var(--tc-blue);
}
.tab.active svg {
    stroke: var(--tc-blue);
}