/* =========================================================
   SITE NAVIGATION
   ========================================================= */

.site-nav {
    position: fixed;
    z-index: 50;
    top: 0;
    left: 0;
    width: 100%;
    height: 78px;

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

    padding: 0 var(--gutter);

    border-bottom: 1px solid transparent;

    transition:
        background .35s ease,
        border-color .35s ease,
        backdrop-filter .35s ease;
}

.site-nav.scrolled {
    background: color-mix(in srgb, var(--bg) 82%, transparent);
    backdrop-filter: blur(18px);
    border-color: var(--border);
}


/* =========================================================
   BRAND
   ========================================================= */

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;

    font: 600 .72rem/1 "JetBrains Mono", monospace;
    letter-spacing: .08em;
}

.brand-mark {
    width: 29px;
    height: 29px;

    display: grid;
    place-items: center;

    border: 1px solid var(--border-strong);
    border-radius: 6px;

    font-size: .62rem;
    color: var(--accent);
}


/* =========================================================
   DESKTOP NAVIGATION
   ========================================================= */

.desktop-nav {
    display: flex;
    align-items: center;
    gap: clamp(18px, 2.4vw, 38px);
}

.desktop-nav a {
    position: relative;

    padding: 8px 0;

    color: var(--muted);

    font: 500 .68rem/1 "JetBrains Mono", monospace;
    text-transform: uppercase;
    letter-spacing: .07em;

    transition: color .2s ease;
}

.desktop-nav a::before {
    content: "";

    position: absolute;

    width: 4px;
    height: 4px;

    border-radius: 50%;

    left: 50%;
    bottom: -4px;

    background: var(--accent);

    transform: translateX(-50%) scale(0);

    transition: transform .25s var(--ease);

    box-shadow:
        0 0 12px rgba(var(--accent-rgb), .5);
}

.desktop-nav a:hover,
.desktop-nav a.active {
    color: var(--text);
}

.desktop-nav a.active::before {
    transform: translateX(-50%) scale(1);
}


/* =========================================================
   NAV ACTIONS
   ========================================================= */

.nav-actions {
    display: flex;
    align-items: center;
    gap: 18px;
}


/* =========================================================
   THEME TOGGLE
   ========================================================= */

.theme-toggle {
    border: 0;
    background: transparent;

    color: var(--muted);

    display: flex;
    align-items: center;
    gap: 7px;

    padding: 5px;

    cursor: pointer;
}

.theme-icon {
    font-size: .9rem;
    line-height: 1;

    min-width: 12px;

    text-align: center;
}

.theme-toggle-track {
    width: 29px;
    height: 16px;

    border: 1px solid var(--border-strong);
    border-radius: 99px;

    padding: 2px;
}

.theme-toggle-thumb {
    display: block;

    width: 10px;
    height: 10px;

    border-radius: 50%;

    background: var(--text);

    transition:
        transform .3s var(--ease);
}

:root[data-theme="light"] .theme-toggle-thumb {
    transform: translateX(13px);
}


/* =========================================================
   MENU TOGGLE
   ========================================================= */

.menu-toggle {
    display: none;

    border: 0;
    background: transparent;

    width: 34px;

    padding: 7px 0;

    cursor: pointer;
}

.menu-toggle span {
    display: block;

    height: 1px;

    background: var(--text);

    margin: 5px 0;

    transition:
        transform .25s ease;
}


/* =========================================================
   SECTION INDEX
   ========================================================= */

.section-index {
    position: fixed;
    z-index: 40;

    right: 28px;
    top: 50%;

    transform: translateY(-50%);

    display: flex;
    flex-direction: column;
    align-items: center;

    gap: 10px;

    color: var(--muted);

    font: 500 .58rem/1 "JetBrains Mono", monospace;
}

.section-index-current {
    color: var(--text);
}

.section-index-line {
    width: 1px;
    height: 62px;

    background:
        linear-gradient(
            var(--accent),
            var(--border)
        );
}


/* =========================================================
   BACK TO PREVIOUS PAGE
   ========================================================= */

.back-link {
    position: fixed;

    left: var(--gutter);
    top: 92px;

    z-index: 90;

    display: inline-flex;
    align-items: center;

    gap: 9px;

    min-height: 40px;

    padding: 0 15px;

    border: 1px solid var(--border-strong);
    border-radius: 7px;

    background: var(--surface);
    color: var(--text-2);

    box-shadow:
        0 8px 28px rgba(0, 0, 0, .14);

    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);

    font: 500 .62rem/1 "JetBrains Mono", monospace;
    letter-spacing: .035em;

    text-decoration: none;

    transition:
        transform .22s var(--ease),
        border-color .22s,
        color .22s,
        box-shadow .22s;
}

.back-link::before {
    content: "←";

    font-size: .8rem;
    color: var(--accent);
}

.back-link:hover {
    color: var(--text);

    border-color: var(--accent);

    transform: translateX(-3px);

    box-shadow:
        0 8px 34px rgba(var(--accent-rgb), .14);
}


/* =========================================================
   MOBILE NAVIGATION PANEL
   ========================================================= */

.mobile-nav-panel {
    position: fixed;

    inset: 68px 0 auto 0;

    z-index: 49;

    display: none;

    padding: 10px var(--gutter) 22px;

    background:
        color-mix(
            in srgb,
            var(--bg) 96%,
            transparent
        );

    border-bottom: 1px solid var(--border);

    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);

    box-shadow:
        0 20px 45px rgba(0, 0, 0, .18);
}

.mobile-nav-panel nav {
    display: grid;

    border-top: 1px solid var(--border);
}

.mobile-nav-panel a {
    display: flex;
    align-items: center;
    justify-content: space-between;

    min-height: 54px;

    border-bottom: 1px solid var(--border);

    color: var(--text-2);

    font: 500 .7rem/1 "JetBrains Mono", monospace;
    letter-spacing: .08em;
    text-transform: uppercase;

    text-decoration: none;
}


/*
   Only numbered/index spans inside normal navigation
   items receive the small-number styling.

   This deliberately excludes .nav-resume so that
   RESUME does not inherit the .55rem number size.
*/
.mobile-nav-panel a:not(.nav-resume) span {
    color: var(--muted);
    font-size: .55rem;
}


/* =========================================================
   RESUME NAV ACTION
   ========================================================= */

/*
   DARK THEME
   White CTA + dark text
*/

.nav-resume {
    display: inline-flex !important;

    align-items: center !important;
    justify-content: center !important;

    gap: 9px !important;

    width: auto !important;
    min-width: 0 !important;

    padding: 8px 13px 8px 15px !important;

    border: 1px solid #f2f4f7 !important;
    border-radius: 4px !important;

    background: #f2f4f7 !important;
    color: #101216 !important;

    /*
       Same typography as desktop nav.
    */
    font:
        500 .68rem/1
        "JetBrains Mono",
        monospace !important;

    text-transform: uppercase !important;
    letter-spacing: .07em !important;

    text-decoration: none !important;
    white-space: nowrap !important;

    box-sizing: border-box !important;

    transition:
        background .2s ease,
        color .2s ease,
        border-color .2s ease,
        transform .2s ease,
        box-shadow .2s ease !important;
}

.nav-resume .resume-arrow {
    display: inline-flex !important;

    align-items: center !important;
    justify-content: center !important;

    /*
       Do NOT let the generic mobile span rule
       shrink this arrow.
    */
    color: #101216 !important;

    font-family: Arial, sans-serif !important;
    font-size: .95rem !important;
    font-weight: 400 !important;
    line-height: 1 !important;

    transform: translateY(-1px);

    transition:
        transform .2s ease,
        color .2s ease;
}


/* =========================================================
   LIGHT THEME
   Black CTA + white text
   ========================================================= */

:root[data-theme="light"] .nav-resume {
    background: #101216 !important;
    border-color: #101216 !important;
    color: #f2f4f7 !important;
}

:root[data-theme="light"] .nav-resume .resume-arrow {
    color: #f2f4f7 !important;
}


/* =========================================================
   RESUME HOVER
   ========================================================= */

.nav-resume:hover {
    transform: translateY(-1px) !important;
}

:root:not([data-theme="light"]) .nav-resume:hover {
    background: #ffffff !important;
    border-color: #ffffff !important;

    color: #0b0d10 !important;

    box-shadow:
        0 6px 20px rgba(255, 255, 255, .10) !important;
}

:root:not([data-theme="light"]) .nav-resume:hover .resume-arrow {
    color: #0b0d10 !important;

    transform:
        translate(2px, -2px);
}

:root[data-theme="light"] .nav-resume:hover {
    background: #000000 !important;
    border-color: #000000 !important;

    color: #ffffff !important;

    box-shadow:
        0 6px 20px rgba(0, 0, 0, .12) !important;
}

:root[data-theme="light"] .nav-resume:hover .resume-arrow {
    color: #ffffff !important;

    transform:
        translate(2px, -2px);
}


/* =========================================================
   MOBILE MENU OPEN STATE
   ========================================================= */

body.menu-open .mobile-nav-panel {
    display: block;
}

body.menu-open .menu-toggle span:first-child {
    transform:
        translateY(6px)
        rotate(45deg);
}

body.menu-open .menu-toggle span:last-child {
    transform:
        translateY(-6px)
        rotate(-45deg);
}


/* =========================================================
   MOBILE RESUME
   ========================================================= */

@media (max-width: 700px) {

    .mobile-nav-panel .nav-resume {
        display: inline-flex !important;

        align-items: center !important;
        justify-content: center !important;

        width: fit-content !important;
        min-width: 0 !important;
        max-width: max-content !important;

        flex: 0 0 auto !important;
        align-self: flex-start !important;

        margin-top: 16px !important;

        padding: 11px 16px 11px 20px !important;

        border-radius: 5px !important;

        /*
           IMPORTANT:
           Exact same typography as the other mobile
           navigation items.
        */
        font:
            500 .7rem/1
            "JetBrains Mono",
            monospace !important;

        text-transform: uppercase !important;
        letter-spacing: .08em !important;

        white-space: nowrap !important;

        box-sizing: border-box !important;

        box-shadow: none !important;
    }

    .mobile-nav-panel .nav-resume .resume-arrow {
        font-family: Arial, sans-serif !important;
        font-size: .95rem !important;
        font-weight: 400 !important;
        line-height: 1 !important;

        transform: translateY(-1px);
    }

}


/* =========================================================
   DESKTOP / MOBILE BREAKPOINT
   ========================================================= */

@media (min-width: 1001px) {

    .mobile-nav-panel {
        display: none !important;
    }
}