/* ============================================
   COMPONENTS — Nav, section header, section variants
   Shared across index.html, jobs.html, roadmap.html and psd.html
   ============================================ */

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: var(--nav-height);
    background: rgba(0, 0, 0, 0.8);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    backdrop-filter: saturate(180%) blur(20px);
    border-bottom: var(--border-dark);
}

.nav__inner {
    max-width: var(--container-max);
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 22px;
}

.nav__back {
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-body);
    font-size: 13px;
    color: var(--color-blue);
    text-decoration: none;
    transition: opacity 0.3s;
}

.nav__back:hover { opacity: 0.7; }

.nav__back svg {
    width: 16px;
    height: 16px;
}

.nav__title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 14px;
    color: var(--color-gray-50);
    letter-spacing: -0.01em;
}

.nav__links {
    display: flex;
    gap: 20px;
    list-style: none;
}

.nav__link {
    font-size: 12px;
    color: var(--color-gray-400);
    text-decoration: none;
    transition: color 0.3s;
}

.nav__link:hover { color: var(--color-gray-50); }

.nav__toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 20px;
    height: 16px;
    position: relative;
}

.nav__toggle-bar {
    display: block;
    width: 100%;
    height: 1px;
    background: var(--color-gray-200);
    position: absolute;
    left: 0;
    transition: all 0.3s;
}

.nav__toggle-bar:nth-child(1) { top: 0; }
.nav__toggle-bar:nth-child(2) { top: 7px; }
.nav__toggle-bar:nth-child(3) { top: 14px; }

/* ============================================
   SECTION HEADER — eyebrow + headline + description
   ============================================ */
.section-eyebrow {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 16px;
}

.section-headline {
    font-family: var(--font-display);
    font-size: clamp(32px, 5vw, 52px);
    font-weight: 700;
    letter-spacing: -0.035em;
    line-height: 1.1;
    margin-bottom: 20px;
}

.section-desc {
    font-size: 18px;
    line-height: 1.6;
    max-width: 640px;
    font-weight: 300;
    letter-spacing: -0.01em;
}

/* ============================================
   SECTION VARIANTS
   ============================================ */
.s-dark {
    background: var(--color-black);
    color: var(--color-gray-50);
}

.s-dark .section-eyebrow { color: var(--color-blue); }
.s-dark .section-desc { color: var(--color-gray-400); }

.s-light {
    background: var(--color-gray-50);
    color: var(--color-gray-900);
}

.s-light .section-eyebrow { color: var(--color-blue-dark); }
.s-light .section-desc { color: var(--color-gray-500); }

/* ============================================
   RESPONSIVE — Mobile nav
   ============================================ */
@media (max-width: 640px) {
    .nav__links { display: none; }
    .nav__toggle { display: block; }

    .nav__links.is-open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: rgba(0, 0, 0, 0.96);
        -webkit-backdrop-filter: blur(20px);
        backdrop-filter: blur(20px);
        padding: 24px;
        gap: 16px;
        border-bottom: var(--border-dark);
    }

    .nav__links.is-open .nav__link { font-size: 14px; }
}

/* ============================================
   PRINT
   ============================================ */
@media print {
    .s-dark { background: #fff; color: #000; }
    .s-dark .section-desc { color: #333; }
}