/* ========================================
   LAYER 3 — SECTION LAYOUT (DESKTOP)
   Base styles = Mobile Layout
   ======================================== */

/* --- 3.1 Navbar --- */

nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;

    display: flex;
    align-items: center;
    justify-content: space-between;

    /* Fluid Container Layout: Matches section content boundaries */
    padding-block: 0;
    padding-inline: max(var(--space-md), calc((100vw - 1200px) / 2));

    min-height: 100px;

    background-color: rgba(10, 10, 20, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);

    border-bottom: 1px solid var(--border-subtle);
    z-index: 50;
    overflow: visible;
    transition: min-height 0.4s ease;
}

nav.scrolled {
    min-height: 64px;
}

.mobile-navbar-brand {
    display: none;
}

.mobile-nav-brand {
    display: none;
}

.nav-links {
    list-style: none;
    display: none;
    flex-direction: column;
    gap: var(--space-md);
    flex-basis: 100%;
    margin-top: 2rem;
    padding-bottom: 1rem;
}

nav.nav-open .nav-links {
    display: flex;
}

/* ---------------------------- */
/* Pill Buttons */
/* ---------------------------- */

.nav-links a {
    display: block;
    max-width: none !important;
    /* CRUISERS: Explicitly rejecting global paragraph text limits */
    padding: 12px 22px;
    font-size: 1.05rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: 30px;
    background: transparent;
    border: 1px solid var(--border-highlight);
    color: var(--text-primary);
    transition: transform 0.25s ease, background 0.25s ease, color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.nav-links a:hover {
    background: var(--brand-primary);
    color: #09090b;
    border-color: var(--brand-secondary);
    transform: translateY(-1px);
    box-shadow: 0 0 20px var(--glow-soft);
}

.nav-links a:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

.nav-links a.active {
    background: rgba(var(--brand-primary-rgb), 0.1);
    border-color: var(--brand-primary);
    color: var(--brand-primary);
}

/* -------------------------------- */
/* CENTER PLACE ORDER BUTTON (NOTCH) */
/* -------------------------------- */

.nav-center-action {
    /* ARCHITECTURE OPTION B: Static Flow Placeholder */
    /* This element establishes an immutable Grid track width so siblings NEVER overlap or shift on scroll. */
    position: relative;
    display: flex;
    justify-content: center;
    width: 200px;
    height: 100%;
    /* Spans the available height of the flex/grid wrapper safely */
}

.center-btn {
    /* Visiual Button is completely decoupled from Grid flow geometry */
    position: absolute;
    top: 0;

    /* Hero State 1: Floating Out Of Bounds */
    display: flex;
    align-items: center;
    justify-content: center;
    width: clamp(200px, 20vw, 240px);
    height: 150px;

    font-size: 1.15rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #09090b;
    background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
    border-radius: 0 0 26px 26px;
    box-shadow: 0 8px 30px var(--glow-soft), inset 0 1px 0 rgba(255, 255, 255, 0.2);

    animation: pulseGlow 3s ease-in-out infinite;

    /* Strict hardware-accelerated transition orchestrations */
    transition:
        width 0.4s cubic-bezier(0.16, 1, 0.3, 1),
        height 0.4s cubic-bezier(0.16, 1, 0.3, 1),
        top 0.4s cubic-bezier(0.16, 1, 0.3, 1),
        border-radius 0.4s ease,
        font-size 0.4s ease,
        transform 0.25s ease,
        background 0.25s ease,
        box-shadow 0.25s ease;

    pointer-events: auto;
}

.center-btn:hover {
    transform: translateY(-2px);
    background: linear-gradient(135deg, var(--brand-secondary), var(--brand-primary));
    box-shadow: 0 12px 35px rgba(96, 165, 250, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.center-btn:active {
    transform: translateY(0);
}

/* -------------------------------- */
/* SCROLLED STATE */
/* -------------------------------- */

nav.scrolled .center-btn {
    /* State 2 (Anchored): Compresses strictly into the placeholder footprint */
    top: 50%;
    /* Center relative to scrolled nav bar height */
    transform: translateY(-50%);
    /* Absolute Y centering offset */

    width: 200px;
    height: 46px;

    border-radius: 14px;
    font-size: 1rem;
    animation: none;
    box-shadow: 0 6px 20px var(--glow-soft);
}

/* Override transform offsets correctly to maintain vertical centering during interaction */
nav.scrolled .center-btn:hover {
    transform: translateY(calc(-50% - 2px));
    background: linear-gradient(135deg, var(--brand-secondary), var(--brand-primary));
    box-shadow: 0 8px 25px rgba(96, 165, 250, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

nav.scrolled .center-btn:active {
    transform: translateY(-50%);
}

/* -------------------------------- */
/* GLOW ANIMATION */
/* -------------------------------- */

@keyframes pulseGlow {
    0% {
        box-shadow: 0 8px 25px rgba(56, 189, 248, 0.25);
    }

    50% {
        box-shadow: 0 14px 40px rgba(96, 165, 250, 0.45);
    }

    100% {
        box-shadow: 0 8px 25px rgba(56, 189, 248, 0.25);
    }
}

@media (prefers-reduced-motion: reduce) {
    .nav-center-action .center-btn {
        animation: none;
    }

    .nav-links a {
        transition: none;
    }

    nav {
        transition: none;
    }
}

.menu-toggle {
    display: block;
    background: transparent;
    border: none;
    cursor: pointer;
}

.menu-icon {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--text-primary);
    transition: background-color 200ms ease;
}

.menu-toggle:hover .menu-icon {
    background-color: var(--brand-primary);
}