/* Explain: Industrial navigation, cards, forms, and section components */
.apex-header {
    background: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.04);
    backdrop-filter: blur(18px);
}

.apex-brand-mark {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.22);
}

.nav-link {
    color: var(--text-muted);
    border-bottom: 2px solid transparent;
    transition: color 180ms ease, border-color 180ms ease, background-color 180ms ease;
}

.nav-link:hover,
.nav-link.is-active {
    color: var(--secondary-color);
    border-bottom-color: var(--accent-color);
    background: rgba(255, 107, 53, 0.08);
}

.apex-btn-primary {
    background: var(--accent-color);
    color: var(--white-color);
    border: 1px solid var(--accent-color);
    box-shadow: 0 14px 28px rgba(255, 107, 53, 0.24);
}

.apex-btn-primary:hover {
    background: #E85D2C;
    border-color: #E85D2C;
    transform: translateY(-1px);
}

.apex-btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: var(--white-color);
    border: 1px solid rgba(255, 255, 255, 0.34);
}

.apex-btn-secondary:hover {
    background: rgba(255, 255, 255, 0.16);
    border-color: rgba(255, 255, 255, 0.58);
}

.engineering-grid {
    background-image:
        linear-gradient(rgba(37, 99, 235, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.08) 1px, transparent 1px);
    background-size: 34px 34px;
}

.metal-panel {
    background:
        radial-gradient(circle at 20% 0%, rgba(255, 107, 53, 0.18), transparent 32%),
        linear-gradient(135deg, #1e293b 0%, #0f172a 46%, #334155 100%);
    color: var(--white-color);
}

.apex-card {
    background: var(--white-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--soft-shadow);
    transition: transform 220ms ease, box-shadow 220ms ease, border-color 220ms ease;
}

.apex-card:hover {
    transform: translateY(-3px);
    border-color: color-mix(in srgb, var(--accent-color) 48%, var(--border-color));
    box-shadow: var(--metal-shadow);
}

.apex-kicker {
    color: var(--primary-color);
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.metal-panel .apex-kicker {
    color: var(--accent-color);
}

.apex-section-title {
    color: var(--secondary-color);
    font-family: var(--font-heading);
    letter-spacing: -0.02em;
}

.apex-rule {
    width: 4rem;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-color), var(--primary-color));
}

.apex-input {
    background: var(--white-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-color);
    min-height: 3rem;
}

.apex-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
    outline: none;
}

.apex-status-success {
    background: rgba(37, 99, 235, 0.1);
    border: 1px solid rgba(37, 99, 235, 0.28);
    color: var(--primary-hover);
}

.apex-status-error {
    background: rgba(255, 107, 53, 0.12);
    border: 1px solid rgba(255, 107, 53, 0.36);
    color: var(--secondary-color);
}