/* =========================================================
   SITE NAV — brand (logo + SWIMTICS) left, Sign In + Tools right
   Reuses existing site values: the cyan-tinted glass bar, Michroma
   for the wordmark (as .hero-title), Exo 2 for nav labels (as the
   old .nav buttons), the .btn cyan→blue gradient, and the cream glass
   used by light mode. Loaded after phone-layout.css.
   ========================================================= */

.site-nav {
    position: relative;
    z-index: 9999;                 /* same stacking as the old .nav: above pages, below the entry gate */

    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;

    min-height: 74px;              /* the old bar's height, so Home content does not move */
    padding: 10px clamp(16px, 4vw, 48px);
    box-sizing: border-box;

    background:
        linear-gradient(180deg,
            rgba(4, 14, 30, 0.88),
            rgba(2, 8, 20, 0.80));
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);

    border-bottom: 1px solid rgba(0, 217, 255, 0.14);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
}

/* While the entry gate is up the bar sits behind it; keep it out of the
   Tab order too (same gate-state pattern as the floating controls in
   entry-gate-motion.css). It becomes visible the moment enterSwimtics()
   adds .exit, so it is revealed under the fading gate as before. */
#entryGate:not(.exit) ~ .site-nav {
    visibility: hidden;
}

/* reset the generic button look for every nav control */
.site-nav button {
    font: inherit;
    color: inherit;
    background: none;
    border: 0;
    margin: 0;
    cursor: pointer;
}

.site-nav button:focus-visible {
    outline: 2px solid #00d9ff;
    outline-offset: 3px;
}

/* ---------- Brand ---------- */
.site-nav-brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    min-height: 44px;
    padding: 4px 6px 4px 0;
    border-radius: 12px;
    min-width: 0;
}

/* favicon.png is a 1254×1254 square with the artwork in its middle band:
   crop to it rather than shrinking the whole square */
.site-nav-logo {
    display: block;
    width: 62px;
    height: 34px;
    object-fit: cover;
    object-position: 50% 52%;
    flex-shrink: 0;
    filter: drop-shadow(0 0 8px rgba(0, 170, 255, 0.35));
}

.site-nav-name {
    font-family: 'Michroma', sans-serif;
    font-size: 1.15rem;
    letter-spacing: 4px;
    color: #f4f8fb;
    text-shadow:
        0 0 10px rgba(0, 191, 255, 0.35),
        0 0 22px rgba(0, 140, 255, 0.2);
    white-space: nowrap;
}

/* ---------- Right-hand actions ---------- */
.site-nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.site-nav-signin,
.site-nav-tools-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    padding: 0 18px;
    border-radius: 14px;

    font-family: 'Exo 2', sans-serif;
    font-size: 0.92rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    white-space: nowrap;

    transition: background 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

/* Sign In: the site's primary .btn gradient, compact */
.site-nav .site-nav-signin {
    color: #fff;
    background: linear-gradient(135deg, rgba(0, 255, 255, 0.25), rgba(0, 120, 255, 0.35));
    border: 1px solid rgba(0, 217, 255, 0.35);
}

.site-nav .site-nav-signin:hover {
    box-shadow: 0 0 18px rgba(0, 217, 255, 0.3);
}

/* Tools: quiet glass button */
.site-nav .site-nav-tools-toggle {
    color: rgba(243, 247, 250, 0.92);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.site-nav .site-nav-tools-toggle:hover,
.site-nav .site-nav-tools-toggle[aria-expanded="true"] {
    color: #fff;
    border-color: rgba(0, 217, 255, 0.45);
    background: rgba(0, 217, 255, 0.08);
}

.site-nav-chevron {
    width: 8px;
    height: 8px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: translateY(-2px) rotate(45deg);
    transition: transform 0.25s ease;
}

.site-nav-tools-toggle[aria-expanded="true"] .site-nav-chevron {
    transform: translateY(2px) rotate(-135deg);
}

/* ---------- Tools menu ---------- */
.site-nav-tools {
    position: relative;
}

.site-nav-menu {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;

    width: 240px;
    max-width: calc(100vw - 24px);
    margin: 0;
    padding: 8px;
    list-style: none;
    box-sizing: border-box;

    background: linear-gradient(135deg, rgba(10, 18, 45, 0.97), rgba(5, 10, 30, 0.98));
    border: 1px solid rgba(0, 217, 255, 0.18);
    border-radius: 16px;
    box-shadow:
        0 18px 40px rgba(0, 0, 0, 0.45),
        0 0 30px rgba(0, 217, 255, 0.08);
}

.site-nav-menu[hidden] {
    display: none;
}

.site-nav-menu button {
    display: flex;
    align-items: center;
    width: 100%;
    min-height: 44px;
    padding: 0 14px;
    border-radius: 10px;
    text-align: left;

    font-family: 'Exo 2', sans-serif;
    font-size: 0.98rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: rgba(243, 247, 250, 0.9);

    transition: background 0.2s ease, color 0.2s ease;
}

.site-nav-menu button:hover,
.site-nav-menu button:focus-visible {
    background: rgba(0, 217, 255, 0.1);
    color: #fff;
}

/* the generic light-mode button hover lift would make menu items jump */
.site-nav button:hover {
    transform: none;
}

/* ---------- Light mode: the existing cream glass ---------- */
body.light-mode .site-nav {
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(248, 244, 232, 0.86));
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: 0 6px 22px rgba(0, 0, 0, 0.06);
}

body.light-mode .site-nav-name {
    color: #111;
    text-shadow: none;
}

body.light-mode .site-nav .site-nav-signin {
    color: #fff;
    background: linear-gradient(135deg, #0aa7e6, #0062d6);
    border-color: transparent;
}

body.light-mode .site-nav .site-nav-signin:hover {
    box-shadow: 0 8px 20px rgba(0, 98, 214, 0.25);
}

body.light-mode .site-nav .site-nav-tools-toggle {
    color: #111;
    background: rgba(255, 255, 255, 0.85);
    border-color: rgba(0, 0, 0, 0.1);
}

body.light-mode .site-nav .site-nav-tools-toggle:hover,
body.light-mode .site-nav .site-nav-tools-toggle[aria-expanded="true"] {
    color: #0062d6;
    border-color: rgba(0, 98, 214, 0.35);
    background: #fff;
}

body.light-mode .site-nav-menu {
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.98), rgba(248, 244, 232, 0.97));
    border-color: rgba(0, 0, 0, 0.08);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.12);
}

body.light-mode .site-nav-menu button {
    color: #111;
}

body.light-mode .site-nav-menu button:hover,
body.light-mode .site-nav-menu button:focus-visible {
    background: rgba(0, 98, 214, 0.08);
    color: #0062d6;
}

body.light-mode .site-nav button:hover {
    box-shadow: none;
}

body.light-mode .site-nav .site-nav-signin:hover {
    box-shadow: 0 8px 20px rgba(0, 98, 214, 0.25);
}

/* ---------- Phones ---------- */
@media (max-width: 600px) {
    .site-nav {
        min-height: 64px;
        gap: 8px;
        padding: 8px 12px;
    }

    .site-nav-brand {
        gap: 8px;
    }

    .site-nav-logo {
        width: 40px;
        height: 22px;
    }

    .site-nav-name {
        font-size: 0.82rem;
        letter-spacing: 2px;
    }

    .site-nav-actions {
        gap: 6px;
    }

    .site-nav-signin,
    .site-nav-tools-toggle {
        padding: 0 12px;
        font-size: 0.8rem;
        letter-spacing: 0.5px;
    }

    /* the Tools button sits 12px from the right edge, so a right-aligned
       menu of at most 100vw - 24px always stays inside the viewport */
    .site-nav-menu {
        width: min(260px, calc(100vw - 24px));
    }

    /* Keep page content where it was. The previous phone bar wrapped to
       two rows (107px); this one-row bar is 65px. Give back the 42px below
       it so content positions are unchanged:
       - Home: as a black top border on #home, continuing the hero video's
         own black letterbox (a margin would show a blank strip of page
         background in light mode). content-box keeps the hero's 100vh.
       - Other pages: on the first .glass card (16px phone margin + 42px).
         The #analyzer/#profile margin-top: 0 !important rules rule out
         putting it on the page itself. */
    .site-nav ~ #home.page {
        border-top: 42px solid #000;
        box-sizing: content-box !important;
    }

    .site-nav ~ .page > .glass:first-child {
        margin-top: 58px;
    }
}

/* narrow phones (~360px): keep logo, name and both actions on one row */
@media (max-width: 380px) {
    .site-nav-brand {
        gap: 6px;
    }

    .site-nav-logo {
        width: 36px;
        height: 20px;
    }

    .site-nav-name {
        font-size: 0.74rem;
        letter-spacing: 1px;
    }

    .site-nav-signin,
    .site-nav-tools-toggle {
        padding: 0 10px;
    }
}

/* very narrow phones (~320px) */
@media (max-width: 340px) {
    .site-nav {
        padding: 8px 10px;
    }

    .site-nav-logo {
        width: 32px;
        height: 18px;
    }

    .site-nav-name {
        font-size: 0.64rem;
        letter-spacing: 1px;
    }

    .site-nav-actions {
        gap: 4px;
    }

    .site-nav-signin,
    .site-nav-tools-toggle {
        padding: 0 6px;
        font-size: 0.74rem;
        gap: 6px;
    }
}