/* RootTrax Shared Styles — Global Header, Navigation, and Responsive Layout */

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: Georgia, 'Times New Roman', serif;
    background: var(--c-bg);
    color: var(--c-text);
    min-height: 100vh;
    margin: 0;
    padding: 0;
    transition: background 0.3s, color 0.3s;
    overflow-x: hidden;
}

@supports (padding: max(0px)) {
    @media (max-width: 640px) {
        body {
            padding-top: env(safe-area-inset-top);
        }
    }
}

.header-wrapper {
    position: relative;
}

header {
    background: var(--c-header);
    color: var(--c-header-text);
    padding: 0 2rem;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
    gap: 1rem;
}
header h1 { font-size: 1.6rem; letter-spacing: 0.04em; }
header .tagline { font-size: 0.9rem; opacity: 0.6; font-style: italic; }

.main-nav {
    background: var(--c-nav);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    padding: 0.45rem;
    gap: 0.3rem;
    border: 1px solid var(--c-border);
    border-radius: 4px;
    margin-left: auto;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.08);
}
.main-nav a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0.68rem 0.95rem;
    font-family: Georgia, serif;
    font-size: 0.93rem;
    color: var(--c-header-text);
    text-decoration: none;
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 4px;
    background: rgba(255,255,255,0.04);
    transition: color 0.15s, border-color 0.15s, background 0.15s, transform 0.15s, box-shadow 0.15s;
    letter-spacing: 0.02em;
}
.main-nav a:hover {
    color: var(--c-header-text);
    background: rgba(255,255,255,0.12);
    border-color: rgba(255,255,255,0.22);
    transform: translateY(-1px);
}
.main-nav a.active {
    color: var(--c-bg);
    background: var(--c-accent);
    border-color: var(--c-accent);
    box-shadow: 0 8px 18px rgba(0, 0, 0, 0.16);
}
.main-nav a.nav-signout {
    color: var(--c-header-text);
    background: var(--c-header);
    border-color: var(--c-header-text);
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.08);
}
.main-nav a.nav-signout:hover {
    color: var(--c-header-text);
    background: var(--c-accent);
    border-color: var(--c-accent);
}
.main-nav a.nav-locked {
    color: var(--c-text-muted);
    background: rgba(255,255,255,0.02);
    border-color: rgba(255,255,255,0.04);
    cursor: not-allowed;
    opacity: 0.6;
}
.main-nav a.nav-locked:hover {
    color: var(--c-text-muted);
    background: rgba(255,255,255,0.02);
    border-color: rgba(255,255,255,0.04);
    transform: none;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--c-accent);
    color: var(--c-bg);
    padding: 8px;
    text-decoration: none;
    border-radius: 4px;
    font-weight: bold;
    z-index: 1000;
    transition: top 0.3s;
}
.skip-link:focus {
    top: 6px;
}

.main-nav a:focus-visible,
.hamburger:focus-visible {
    outline: 3px solid var(--c-accent);
    outline-offset: 2px;
    box-shadow: 0 0 0 2px var(--c-bg);
}

.hamburger {
    display: none;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 4px;
    cursor: pointer;
    padding: 0.5rem 0.7rem;
    color: var(--c-header-text);
    font-size: 1.5rem;
    line-height: 1;
}

@media (max-width: 640px) {
    header {
        height: auto;
        padding: 1rem 2rem;
        flex-direction: column;
        align-items: flex-start;
    }
    .hamburger {
        display: flex;
        position: absolute;
        top: 4rem;
        right: 1rem;
    }
    .main-nav {
        display: none;
        flex-direction: column;
        justify-content: flex-start;
        align-items: stretch;
        width: 100%;
        margin: 0;
        padding: 0.45rem;
        background: var(--c-nav);
        border: 1px solid var(--c-border);
        border-radius: 0;
        box-shadow: none;
        position: absolute;
        top: 56px;
        left: 0;
        z-index: 100;
    }
    .main-nav.open {
        display: flex;
    }
    .main-nav a { display: none; }
    .main-nav.open a {
        display: flex;
        width: 100%;
        justify-content: flex-start;
        font-size: 1rem;
        background: rgba(255,255,255,0.06);
        border-color: rgba(255,255,255,0.14);
        padding: 0.68rem 0.95rem;
        margin: 0;
        border: 1px solid rgba(255,255,255,0.08);
    }
    .main-nav.open a.active {
        color: var(--c-bg);
        background: var(--c-accent);
        border-color: var(--c-accent);
    }
}