/* =========================================================
   TTWORBYTES MASTER HEADER
   ========================================================= */

:root {
    --header-background:
        rgba(35, 48, 78, 0.94);

    --header-background-scrolled:
        rgba(30, 42, 70, 0.98);

    --header-border:
        rgba(255, 255, 255, 0.12);

    --header-text:
        rgba(255, 255, 255, 0.9);

    --header-muted:
        rgba(255, 255, 255, 0.72);

    --header-gold:
        #d6a94a;

    --header-height:
        78px;

    --header-content-width:
        1200px;

    --header-transition:
        220ms ease;
}

/* Prevent page content from sitting beneath the sticky header. */

body {
    padding-top: var(--header-height);
}

/* Stops the page moving while the mobile menu is open. */

body.menu-open {
    overflow: hidden;
}

/* Main header */

.master-header {
    position: fixed;
    z-index: 1000;
    top: 0;
    right: 0;
    left: 0;

    height: var(--header-height);

    background:
        linear-gradient(
            to bottom,
            rgba(45, 60, 95, 0.96),
            var(--header-background)
        );

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

    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);

    transition:
        background var(--header-transition),
        box-shadow var(--header-transition),
        border-color var(--header-transition);
}

/* Slightly stronger appearance after scrolling */

.master-header.has-scrolled {
    background:
        var(--header-background-scrolled);

    border-bottom-color:
        rgba(214, 169, 74, 0.25);

    box-shadow:
        0 12px 35px rgba(0, 0, 0, 0.28);
}

/* Header content area */

.master-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;

    width: min(
        calc(100% - 48px),
        var(--header-content-width)
    );

    height: 100%;
    margin-inline: auto;
}

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

.master-brand {
    display: inline-flex;
    flex-shrink: 0;
    align-items: center;
    gap: 12px;

    color: #ffffff;
    text-decoration: none;

    transition:
        opacity var(--header-transition),
        transform var(--header-transition);
}

.master-brand:hover {
    transform: translateY(-1px);
}

.master-brand:focus-visible {
    outline: 2px solid var(--header-gold);
    outline-offset: 5px;
    border-radius: 6px;
}

.master-brand__logo {
    display: block;

    width: 104px;
    height: 104px;

    object-fit: contain;
}

.master-brand__name {
    font-size: 1.08rem;
    font-weight: 750;
    line-height: 1;
    letter-spacing: 0.12em;
}

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

.master-nav__list {
    display: flex;
    align-items: center;
    gap: clamp(18px, 2vw, 29px);

    margin: 0;
    padding: 0;

    list-style: none;
}

.master-nav__link {
    position: relative;

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

    min-height: 44px;

    color: var(--header-text);

    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1;
    text-decoration: none;

    transition:
        color var(--header-transition),
        opacity var(--header-transition);
}

/* Animated underline */

.master-nav__link::after {
    position: absolute;
    right: 0;
    bottom: 5px;
    left: 0;

    height: 2px;

    content: "";

    background: var(--header-gold);
    border-radius: 999px;

    transform: scaleX(0);
    transform-origin: center;

    transition:
        transform var(--header-transition);
}

.master-nav__link:hover {
    color: #ffffff;
}

.master-nav__link:hover::after {
    transform: scaleX(1);
}

/* Current page */

.master-nav__link.is-current {
    color: var(--header-gold);
}

.master-nav__link.is-current::after {
    transform: scaleX(1);
}

.master-nav__link:focus-visible {
    color: var(--header-gold);

    outline: 2px solid var(--header-gold);
    outline-offset: 5px;
    border-radius: 3px;
}

/* =========================================================
   MOBILE MENU BUTTON
   ========================================================= */

.master-menu-button {
    display: none;
    place-content: center;

    width: 46px;
    height: 46px;
    padding: 0;

    cursor: pointer;

    background:
        rgba(255, 255, 255, 0.035);

    border:
        1px solid rgba(255, 255, 255, 0.11);

    border-radius: 12px;

    transition:
        background-color var(--header-transition),
        border-color var(--header-transition);
}

.master-menu-button:hover {
    background:
        rgba(214, 169, 74, 0.08);

    border-color:
        rgba(214, 169, 74, 0.42);
}

.master-menu-button:focus-visible {
    outline: 2px solid var(--header-gold);
    outline-offset: 4px;
}

.master-menu-button__line {
    display: block;

    width: 21px;
    height: 2px;
    margin: 3px auto;

    background: #ffffff;
    border-radius: 999px;

    transition:
        transform var(--header-transition),
        opacity var(--header-transition);
}

/* Turn the three lines into a close symbol */

.master-menu-button.is-open
.master-menu-button__line:nth-child(1) {
    transform: translateY(5px) rotate(45deg);
}

.master-menu-button.is-open
.master-menu-button__line:nth-child(2) {
    opacity: 0;
}

.master-menu-button.is-open
.master-menu-button__line:nth-child(3) {
    transform: translateY(-5px) rotate(-45deg);
}

/* =========================================================
   MOBILE AND TABLET
   ========================================================= */

@media (max-width: 980px) {
    :root {
        --header-height: 70px;
    }

    .master-header__inner {
        width: min(
            calc(100% - 32px),
            var(--header-content-width)
        );
    }

    .master-brand__logo {
        width: 42px;
        height: 42px;
    }

    .master-brand__name {
        font-size: 1rem;
    }

    .master-menu-button {
        display: grid;
    }

    .master-nav {
        position: fixed;
        top: var(--header-height);
        right: 0;
        bottom: 0;
        left: 0;

        visibility: hidden;
        overflow-y: auto;

        padding:
            24px
            24px
            48px;

        background:
            rgba(11, 16, 32, 0.97);

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

        opacity: 0;
        transform: translateY(-12px);

        transition:
            opacity var(--header-transition),
            transform var(--header-transition),
            visibility var(--header-transition);
    }

    .master-nav.is-open {
        visibility: visible;

        opacity: 1;
        transform: translateY(0);
    }

    .master-nav__list {
        flex-direction: column;
        align-items: stretch;
        gap: 6px;

        width: min(100%, 560px);
        margin-inline: auto;
    }

    .master-nav__link {
        justify-content: space-between;

        min-height: 57px;
        padding-inline: 18px;

        font-size: 1.05rem;

        background:
            rgba(255, 255, 255, 0.025);

        border:
            1px solid rgba(255, 255, 255, 0.07);

        border-radius: 12px;
    }

    .master-nav__link::after {
        top: 50%;
        right: 18px;
        bottom: auto;
        left: auto;

        width: 7px;
        height: 7px;

        border-radius: 50%;

        transform:
            translateY(-50%)
            scale(0);
    }

    .master-nav__link:hover {
        background:
            rgba(255, 255, 255, 0.05);
    }

    .master-nav__link:hover::after,
    .master-nav__link.is-current::after {
        transform:
            translateY(-50%)
            scale(1);
    }

    .master-nav__link.is-current {
        background:
            rgba(214, 169, 74, 0.08);

        border-color:
            rgba(214, 169, 74, 0.3);
    }
}

@media (max-width: 520px) {
    .master-header__inner {
        width: calc(100% - 24px);
    }

    .master-brand {
        gap: 9px;
    }

    .master-brand__logo {
        width: 39px;
        height: 39px;
    }

    .master-brand__name {
        font-size: 0.91rem;
        letter-spacing: 0.09em;
    }

    .master-menu-button {
        width: 43px;
        height: 43px;
    }
}

/* =========================================================
   REDUCED MOTION
   ========================================================= */

@media (prefers-reduced-motion: reduce) {
    .master-header,
    .master-brand,
    .master-nav,
    .master-nav__link,
    .master-nav__link::after,
    .master-menu-button,
    .master-menu-button__line {
        transition: none;
    }
}