/*
 * Header & Navigation
 * pomsy.space — Editorial Personal Portfolio (Matching updated_ui.jpeg & Prompt Section 1)
 */

.site-header {
    position: relative;
    width: 100%;
    z-index: 100;
    padding: var(--space-40) var(--page-padding) var(--space-20);
    background: transparent;
}

.site-header__inner {
    max-width: 1080px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
}

/* ── Left: Brand Lockup (pomsy.space) ── */
.header-brand {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-decoration: none;
    color: var(--color-text);
}

.header-brand__main {
    display: inline-flex;
    align-items: center;
    gap: var(--space-8);
}

.header-brand__sparkle {
    font-size: 1.15rem;
    color: var(--color-text);
    line-height: 1;
}

.header-brand__title {
    font-family: var(--font-serif-sub);
    font-size: 1.65rem;
    font-weight: 500;
    letter-spacing: -0.01em;
    color: var(--color-text);
    line-height: 1.1;
    transition: color var(--duration-fast) var(--ease-out);
}

.header-brand__subtitle {
    font-family: var(--font-sans);
    font-size: 0.6875rem;
    letter-spacing: 0.18em;
    color: var(--color-text-muted);
    margin-top: 3px;
    padding-left: 20px;
    text-transform: lowercase;
}

@media (hover: hover) and (pointer: fine) {
    .header-brand:hover .header-brand__title {
        color: var(--color-kombu-green);
    }
}

/* ── Right: Navigation Links ── */
.header-nav {
    display: flex;
    align-items: center;
    gap: var(--space-24);
}

.header-nav__link {
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: 400;
    letter-spacing: 0.16em;
    text-transform: lowercase;
    color: var(--color-text);
    text-decoration: none;
    position: relative;
    padding: var(--space-4) 0;
    transition: color var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-out);
}

.header-nav__dot {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    user-select: none;
    opacity: 0.6;
}

/* Thin animated underline on hover (Section 11) */
.header-nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-text);
    transition: width var(--duration-normal) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
    .header-nav__link:hover {
        color: var(--color-kombu-green);
    }
    .header-nav__link:hover::after {
        width: 100%;
    }
}

.header-nav__link.is-active {
    color: var(--color-kombu-green);
    font-weight: 500;
}

.header-nav__link.is-active::after {
    width: 100%;
    background-color: var(--color-kombu-green);
}

.header-nav__link:active {
    transform: scale(0.97);
}

/* ── Mobile Hamburger Toggle ── */
.nav-toggle {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--space-8);
    width: 36px;
    height: 36px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    z-index: 105;
}

.nav-toggle__line {
    width: 22px;
    height: 1.5px;
    background-color: var(--color-text);
    transition: transform var(--duration-normal) var(--ease-out), opacity var(--duration-fast) ease;
}

.nav-toggle:active {
    transform: scale(0.95);
}

/* ── Mobile Menu Overlay ── */
.nav-mobile-drawer {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(237, 229, 216, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    z-index: 105;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-28);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--duration-normal) var(--ease-out);
}

.nav-mobile-drawer.is-open {
    opacity: 1;
    pointer-events: auto;
}

/* Dedicated Close Button inside Drawer (Top Right) */
.nav-mobile-close {
    position: absolute;
    top: clamp(16px, 4vw, 24px);
    right: clamp(16px, 4vw, 24px);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(53, 64, 36, 0.08);
    border: 1px solid rgba(53, 64, 36, 0.16);
    border-radius: 50%;
    color: var(--color-text);
    cursor: pointer;
    transition: transform 160ms var(--ease-out), background 160ms var(--ease-out);
    z-index: 106;
}

.nav-mobile-close:active {
    transform: scale(0.92);
    background: rgba(53, 64, 36, 0.18);
}

@media (hover: hover) and (pointer: fine) {
    .nav-mobile-close:hover {
        background: rgba(53, 64, 36, 0.14);
        transform: rotate(90deg);
    }
}

.nav-mobile-drawer .header-nav__link {
    font-size: 1.25rem;
    letter-spacing: 0.2em;
    color: var(--color-text);
    padding: 8px 16px;
    border-radius: 6px;
    transition: transform var(--duration-fast) var(--ease-out), color var(--duration-fast) ease;
}

.nav-mobile-drawer .header-nav__link:active {
    transform: scale(0.96);
    color: var(--color-kombu-green);
}

/* ── Responsive ── */
@media (max-width: 860px) {
    .site-header {
        padding: var(--space-24) var(--page-padding) var(--space-16);
    }

    .header-nav {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-mobile-drawer {
        display: flex;
    }
}