/* ==========================
   Header / Navigation
   ========================== */

.site-header {
    background: var(--header-bg);
    color: var(--text-on-header);
    width: 100%;
    box-shadow: var(--shadow-header);
    position: relative;
    z-index: 50;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--gutter);
    padding: 0 12px;
    box-sizing: border-box;
    height: var(--header-height-clamp);
    min-height: var(--header-min-height);
}

/* Logo area */
.logo-wrap {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    padding: 0 8px;
    color: inherit;
}

.logo {
    display: block;
    width: auto;
    height: auto;
    max-height: calc(var(--header-height-clamp) - 12px);
    max-width: clamp(var(--logo-min-width), var(--logo-width-scale), var(--logo-max-width));
    object-fit: contain;
    vertical-align: middle;
}

/* Site title */
.site-title {
    color: var(--text-on-header);
    font-weight: 800;
    font-family: var(--brand-font);
    font-size: var(--title-size);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    line-height: 1;
    display: inline-block;
    margin-left: 6px;
    text-decoration: none;
    text-shadow: 0 1px 0 rgba(0, 0, 0, 0.35);
}

/* Navigation container */
.header-nav {
    display: flex;
    align-items: center;
    gap: var(--nav-gap);
    padding-right: 12px;
    margin-left: auto;
}

/* Generic inline alignment for icons and links */
.header-nav .nav-link,
.header-nav .nav-icon,
.header-nav .camera-icon,
.header-nav .user-btn,
.header-nav .user-icon {
    vertical-align: middle;
}

/* Icon container */
.header-nav .nav-icon {
    width: var(--icon-container);
    height: var(--icon-container);
    padding: 4px;
    border-radius: var(--radius-md);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    color: var(--text-on-header);
    background: transparent;
    transition: background var(--transition-fast), transform var(--transition-fast);
}

/* SVG defaults inside header-nav */
.header-nav svg {
    width: var(--icon-small);
    height: var(--icon-small);
    display: block;
    stroke: currentColor;
    fill: none;
    vector-effect: non-scaling-stroke;
}

/* Links and buttons */
.header-nav .nav-link {
    color: var(--text-on-header);
    text-decoration: none;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    background: transparent;
    transition: background var(--transition-fast), color var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

/* Hover and active states */
.header-nav .nav-link:hover,
.header-nav .nav-icon:hover,
.user-btn:hover {
    background: rgba(255, 255, 255, 0.04);
    transform: translateY(-1px);
}

/* Focus styles for accessibility */
.header-nav .nav-link:focus,
.header-nav .nav-icon:focus,
.user-btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px var(--focus-ring);
    border-radius: var(--radius-md);
}

/* Reduce motion preference */
@media (prefers-reduced-motion: reduce) {

    .header-nav .nav-icon,
    .header-nav .nav-link,
    .user-btn {
        transition: none;
    }
}

/* User area */
.user-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: transparent;
    border: none;
    color: var(--text-on-header);
    cursor: pointer;
    padding: 6px;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    -webkit-appearance: none;
}

/* Visible focus for keyboard users only */
.user-btn:focus-visible,
.header-nav .nav-link:focus-visible,
.header-nav .nav-icon:focus-visible {
    outline: 2px solid var(--focus-ring);
    outline-offset: 2px;
}

/* Username text */
.nav-user {
    color: var(--text-on-header);
    margin-left: 4px;
    font-weight: 600;
    white-space: nowrap;
    display: inline-block;
}

/* Hidden logout form */
.logout-form {
    display: none !important;
    margin: 0;
    padding: 0;
    border: 0;
}

/* Responsive adjustments */
@media (min-width: 1000px) {
    .header-nav {
        gap: var(--nav-gap-wide);
        padding-right: 20px;
    }

    .header-nav .nav-link {
        padding: 10px 14px;
    }

    .header-nav .nav-icon {
        width: var(--icon-container-wide);
        height: var(--icon-container-wide);
        padding: 6px;
    }

    .header-nav svg {
        width: var(--icon-medium);
        height: var(--icon-medium);
    }

    .user-btn {
        gap: 8px;
        padding: 6px 8px;
    }
}

@media (max-width: 720px) {
    .header-inner {
        height: var(--header-height-mobile);
    }

    .header-nav {
        gap: 6px;
        padding-right: 8px;
    }

    .logo {
        max-height: calc(var(--header-height-mobile) - 8px);
    }

    .header-nav .nav-link {
        padding: 6px 8px;
        font-size: 0.95rem;
    }

    .nav-user {
        display: none;
    }

    .user-btn {
        padding: 6px;
        gap: 6px;
    }

    .header-nav .nav-icon {
        width: var(--icon-container-mobile);
        height: var(--icon-container-mobile);
        padding: 4px;
    }

    .header-nav svg {
        width: var(--icon-small);
        height: var(--icon-small);
    }
}

/* Small utility improvements */
/* Ensure links and buttons inherit color and are keyboard accessible */
.header-nav a,
.header-nav button {
    color: inherit;
    background: none;
    border: none;
    text-decoration: none;
}

/* Prevent layout shift for SVG icons */
.header-nav .nav-icon svg {
    display: inline-block;
    vertical-align: middle;
}

/* High contrast fallback for users who need it */
@media (forced-colors: active) {
    .site-header {
        background: Window;
        color: WindowText;
    }

    .header-nav .nav-link,
    .user-btn {
        background: transparent;
        color: WindowText;
    }

    .header-nav .nav-link:focus,
    .user-btn:focus {
        outline: 2px solid Highlight;
        outline-offset: 2px;
    }
}