/* ═══════════════════════════════════════════════════
   UDEC Light Glassmorphism — Tabs & Step Navigation
   ═══════════════════════════════════════════════════ */

/* ── Tab Bar ── */
.tab-bar {
    background: var(--bg-card);
    backdrop-filter: var(--blur-card);
    -webkit-backdrop-filter: var(--blur-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    margin-bottom: 1.25rem;
    overflow: hidden;
    display: flex;
    box-shadow: var(--shadow-card);
}

.tab-btn {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.75rem 0.5rem;
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--text-secondary);
    border: none;
    border-bottom: 2px solid transparent;
    background: none;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    font-family: var(--font-family);
}

    .tab-btn:hover {
        color: var(--text-primary);
        background: rgba(255, 255, 255, 0.3);
    }

    .tab-btn .tab-icon {
        font-size: 1rem;
        margin-bottom: 0.15rem;
        color: inherit;
    }

    .tab-btn .tab-label {
        display: none;
    }

@media (min-width: 640px) {
    .tab-btn .tab-label {
        display: inline;
    }
}

/* Active */
.tab-btn--active {
    border-bottom-color: var(--accent-primary);
    color: var(--accent-primary);
    background: rgba(59, 109, 219, 0.08);
    font-weight: 600;
}

/* Error */
.tab-btn--error {
    border-bottom-color: #dc2626;
    color: #dc2626;
    background: rgba(220, 38, 38, 0.04);
}

.tab-error-dot {
    width: 6px;
    height: 6px;
    background: #dc2626;
    border-radius: 50%;
    margin-top: 0.2rem;
}

@media (min-width: 640px) {
    .tab-error-dot {
        display: none;
    }
}

/* ── Step Navigation ── */
.step-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 1.5rem;
}

    .step-nav .step-counter {
        font-size: 0.72rem;
        color: var(--text-muted);
    }

.btn-prev {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.5rem 1.15rem;
    border-radius: var(--radius-md);
    font-size: 0.82rem;
    font-weight: 500;
    border: 1px solid var(--border-medium);
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font-family);
}

    .btn-prev:hover:not(:disabled) {
        color: var(--accent-primary);
        border-color: var(--accent-primary);
        background: rgba(59, 109, 219, 0.06);
    }

    .btn-prev:disabled {
        opacity: 0.35;
        cursor: not-allowed;
    }

.btn-next {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.5rem 1.15rem;
    border-radius: var(--radius-md);
    font-size: 0.82rem;
    font-weight: 600;
    border: none;
    background: var(--accent-primary);
    color: var(--text-white);
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 2px 12px rgba(59, 109, 219, 0.25);
    font-family: var(--font-family);
}

    .btn-next:hover {
        background: var(--accent-dark);
        box-shadow: 0 4px 18px rgba(59, 109, 219, 0.35);
        transform: translateY(-1px);
    }

.btn-submit {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 1.5rem;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 700;
    border: none;
    background: var(--accent-gradient);
    color: var(--text-white);
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 2px 14px rgba(59, 109, 219, 0.3);
    font-family: var(--font-family);
}

    .btn-submit:hover:not(:disabled) {
        box-shadow: 0 4px 20px rgba(59, 109, 219, 0.4);
        transform: translateY(-1px);
    }

    .btn-submit:disabled {
        opacity: 0.5;
        cursor: not-allowed;
        transform: none;
    }

/* ── Header Card ── */
.form-header {
    text-align: center;
    padding: 1.5rem;
    margin-bottom: 1.25rem;
}

    .form-header h1 {
        font-size: 1.35rem;
        font-weight: 800;
        margin: 0 0 0.25rem;
        color: var(--accent-primary);
    }

    .form-header p {
        color: var(--text-secondary);
        font-size: 0.82rem;
        margin: 0;
    }