/* =========================================================
   header.css – Header & Mobile Navigation
   ---------------------------------------------------------
   TABLE OF CONTENTS
   1) Header Container & Toggle (desktop)
   2) Desktop Dropdown Menu
   3) Menu Content & Columns
   4) Header Lower: Display Options
   5) Divider
   6) Body Lock (when menus are open)
   7) Mobile Bottom Bar (Logo + Hamburger)
   8) Mobile Overlay Menu
   9) Mobile Accordion (copy-paste sections)
  10) Responsive Tweaks (≤768px)
   ========================================================= */
/* =========================================================
   1) Header Container & Toggle (desktop)
   ========================================================= */
.hmenu-hcon {
    position: fixed;
    top: var(--spacing-md);
    left: var(--spacing-md);
    z-index: 1000;
}

.hmenu-toggle {
    width: 8rem;
    height: 8rem;
    /* background: var(--color-bg-alt); */
    background: white;
    border: 2px solid var(--color-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
    z-index: 1001;
    padding: 0;
    overflow: hidden;
    /* prevents hidden content from affecting layout */
}

/* Logo inside round toggle */
.hmenu-toggle .hicon-logo {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 6.8rem;
    height: 6.8rem;
    object-fit: contain;
    z-index: 1;
    opacity: 1;
    transition: opacity 0.2s ease;
}

/* Close icon inside round toggle */
.hmenu-toggle .hicon-close {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2rem;
    line-height: 1;
    cursor: pointer;
    z-index: 2;
    opacity: 0;
    transition: opacity 0.2s ease;
}

/* Toggle visibility */
.hmenu-hcon.open .hmenu-toggle .hicon-logo {
    opacity: 0;
}

.hmenu-hcon.open .hmenu-toggle .hicon-close {
    display: block !important;
    opacity: 1 !important;
    animation-name: fadeInhicon !important;
}

/* Small fade animation */
@keyframes fadeInhicon {
    from {
        opacity: 0;
        transform: scale(0.8) translate(-50%, -50%);
    }

    to {
        opacity: 1;
        transform: scale(1) translate(-50%, -50%);
    }
}

.hmenu-toggle .hicon-logo,
.hmenu-toggle .hicon-close {
    animation-duration: 0.2s;
    animation-fill-mode: forwards;
}

.hmenu-hcon.open .hmenu-toggle .hicon-close {
    animation-name: fadeInhicon;
}

.hmenu-hcon:not(.open) .hmenu-toggle .hicon-logo {
    display: block !important;
    opacity: 1 !important;
    animation-name: fadeInhicon !important;
}

/* =========================================================
   2) Desktop Dropdown Menu  (scrollable at all widths)
   ========================================================= */
.hdropdown-hmenu {
    position: fixed;
    inset: 0;
    background: var(--color-bg-alt);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    /* ✨ make the overlay itself scroll vertically */
    max-height: 100vh;
    overflow-y: auto;
    overscroll-behavior: contain;
    /* keep scroll inside the menu */
    scrollbar-gutter: stable both-edges;
    /* avoid layout shift when scrollbar appears */
    -webkit-overflow-scrolling: touch;
    /* smooth scrolling on trackpads/iOS */
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    z-index: 900;
    /* keep some breathing space at top/bottom so last links aren’t clipped */
    padding-top: calc(6rem + var(--spacing-md));
    padding-right: var(--spacing-lg);
    padding-left: var(--spacing-lg);
    padding-bottom: calc(var(--spacing-lg) + env(safe-area-inset-bottom, 0px));
    transform: translateY(-20px) scale(0.95);
    transform-origin: top left;
    transition:
        opacity 0.3s ease,
        transform 0.3s ease,
        visibility 0.3s ease;
    will-change: opacity, transform;
}

.hmenu-hcon.open .hdropdown-hmenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

/* =========================================================
   3) Menu Content & Columns
   ========================================================= */
#top-home {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: center;
    gap: var(--spacing-sm);
    width: 90vw;
    max-width: 95%;
    margin: 0 auto;
    padding: var(--spacing-sm);
    list-style: none;
    text-decoration: none;
    border-bottom: 2px solid var(--color-secondary);
    color: var(--text-primary);
}

#top-home a {
    font-family: var(--font-heading);
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s, border-color 0.2s;
}

#top-home a:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.hmenu-content {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: center;
    gap: var(--spacing-md);
    width: 90vw;
    max-width: 95%;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-xs);
}

.hmenu-hcol {
    list-style: none;
    margin: 0;
    padding: 0;
    min-width: 12rem;
}

.hmenu-hcol li {
    margin-bottom: var(--spacing-sm);
}

.hmenu-hcol.mcol_left,
.hmenu-hcol.mcol_right {
    text-align: left;
}

/* Unified anchor styles */
.hmenu-hcol a,
.hmenu-hcol li a.theme-option,
.hmenu-hcol li a.cb-option {
    font-family: var(--font-heading);
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s, border-color 0.2s;
}

.hmenu-hcol a:hover,
.hmenu-hcol li a.theme-option:hover,
.hmenu-hcol li a.cb-option:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
}

/* =========================================================
   4) Header Lower: Display Options
   ========================================================= */
#header-lower {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--color-bg-alt);
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    position: relative;
}

#header-lower::after {
    content: "";
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    border-top: 1px solid var(--color-secondary);
}

#header-lower .hmenu-hcol {
    display: flex;
    flex-direction: row;
    gap: var(--spacing-sm);
    align-items: center;
    justify-content: center;
}

#header-lower .hmenu-hcol li {
    margin: 0;
}

#header-lower .hmenu-hcol li strong {
    display: none;
}

#header-lower .hmenu-hcol a {
    font-size: var(--font-size-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    border: none;
    border-radius: var(--stn-radius);
    background-color: var(--color-secondary);
    color: var(--text-on-primary);
    transition: background-color 0.2s ease;
    text-decoration: none;
}

#header-lower .hmenu-hcol a:hover {
    background-color: var(--color-accent);
    color: var(--text-on-primary);
}

/* =========================================================
   5) Divider
   ========================================================= */
.hmenu-divider {
    width: 1px;
    height: auto;
    background: var(--text-primary);
    align-self: stretch;
    margin: 0 var(--spacing-sm);
}

/* =========================================================
   6) Body Lock (when menus are open)
   ========================================================= */
body.hmenu-open {
    overflow: hidden;
}

/* =========================================================
   7) Mobile Bottom Bar (Logo + Hamburger)
   - Pill container
   - Bigger circular logo button
   - Compact hamburger button
   - Centered close “✕” when open
   ========================================================= */
.mobile-bottom-nav {
    position: fixed;
    bottom: 0.5em;
    /* left: 50%; */
    left: 25%;
    transform: translateX(-50%);
    z-index: 1100;
    display: none;
    /* shown only on mobile in media query */
    align-items: center;
    gap: 0.6rem;
    padding: 0.35rem 0.5rem;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-secondary);
    border-radius: 9999px;
    box-shadow: var(--stn-shadow);
}

/* Bigger logo button */
.mbnav-logo-btn {
    width: 3rem;
    height: 3rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-secondary);
    border-radius: 9999px;
    padding: 0;
    cursor: pointer;
}

.mbnav-logo-btn img {
    width: 2.2rem;
    height: 2.2rem;
    object-fit: contain;
}

/* Fix hamburger: show 3 horizontal bars stacked vertically */
.mbnav-hamburger {
    display: inline-flex;
    flex-direction: column;
    /* stack the bars */
    align-items: center;
    justify-content: center;
    gap: 4px;
    /* space between bars */
    width: 3.2rem;
    height: 3rem;
    background: var(--color-bg-alt);
    border: 0px solid var(--color-secondary);
    border-radius: 10px;
    padding: 0;
}

/* The bars themselves */
.mbnav-hamburger .mbnav-bar {
    width: 22px;
    /* make them “banner” lines */
    height: 2px;
    background: var(--text-primary);
    border-radius: var(--stn-radius);
}

/* Neutralize any older margin-top rule */
.mbnav-hamburger .mbnav-bar+.mbnav-bar {
    margin-top: 0;
}

.mbnav-hamburger .mbnav-bar {
    width: calc(100% - 16px);
}

/* Centered close icon (visible when open) */
.mbnav-close {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.9rem;
    font-weight: 700;
    /* color: var(--text-primary); */
    opacity: 0;
    pointer-events: none;
    /* stays non-clickable when closed */
    transition: opacity 0.2s ease;
}

/* Fade bar controls when open, show X */
.mobile-bottom-nav.open .mbnav-logo-btn,
.mobile-bottom-nav.open .mbnav-hamburger {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.mobile-bottom-nav.open .mbnav-close {
    opacity: 1;
    pointer-events: auto;
}

/* =========================================================
   8) Mobile Overlay Menu
   - Hidden by default; shown when bottom bar has .open
   - Extra bottom padding so the X never overlaps links
   - Slim, readable column
   ========================================================= */
.mbnav-menu {
    position: fixed;
    inset: 0;
    background: var(--color-bg-alt);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    z-index: 1000;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    /* default padding; mobile override refines this */
    padding: 4rem 1rem;
}

/* Reveal overlay when the bar is .open (adjacent sibling) */
.mobile-bottom-nav.open+.mbnav-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

/* Clean typography for links */
.mbnav-menu ul,
.mbnav-menu li,
.mbnav-menu a {
    font-family: var(--font-heading);
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s, border-color 0.2s;
}

.mbnav-menu a:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
}

/* =========================================================
   9) Mobile Accordion (copy-paste sections)
   - Drop-in: duplicate .mb-acc-toggle + next .mb-acc-panel
   - Works with JS that sets max-height for smooth open/close
   ========================================================= */
.mb-accordion {
    display: block;
}

.mb-acc-toggle {
    width: 100%;
    text-align: left;
    padding: 0.5rem 0.6rem;
    margin: 0 0 0.5rem 0;
    font-size: 0.9rem;
    /* refined on mobile via variables */
    line-height: 1.35;
    color: var(--text-primary);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-secondary);
    border-radius: var(--stn-radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 600;
    --mbacc-size: 1.05em;
    /* icon square relative to text size */
    --mbacc-stroke: 2px;
}

.mb-acc-toggle:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* .mb-acc-caret {
    width: 0.75rem;
    height: 0.75rem;
    border-right: 2px solid var(--text-primary);
    border-bottom: 2px solid var(--text-primary);
    transform: rotate(-45deg);
    transition: transform 0.2s ease;
    flex: 0 0 auto;
    margin-left: 0.5rem;
} */
.mb-acc-caret {
    position: relative;
    flex: 0 0 auto;
    width: var(--mbacc-size);
    height: var(--mbacc-size);
    margin-left: 0.5rem;
    color: currentColor;
    /* follows text color in light/dark modes */
}

.mb-acc-caret::before,
.mb-acc-caret::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    background: currentColor;
    transform: translate(-50%, -50%);
    border-radius: var(--stn-radius);
}

.mb-acc-caret::before {
    width: 100%;
    height: var(--mbacc-stroke);
}

.mb-acc-caret::after {
    width: var(--mbacc-stroke);
    height: 100%;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

/* .mb-acc-toggle[aria-expanded="true"] .mb-acc-caret {
    transform: rotate(45deg);
} */
.mb-acc-toggle[aria-expanded="true"] .mb-acc-caret::after {
    transform: translate(-50%, -50%) scaleY(0);
    opacity: 0;
}

.mb-acc-panel {
    overflow: hidden;
    max-height: 0;
    /* collapsed by default */
    transition: max-height 0.25s ease;
    margin: 0 0 0.75rem 0;
    padding-left: 2%;
}

.mbnav-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.mbnav-list li {
    margin: 0.25rem 0;
}

.mbnav-list a {
    display: block;
    font-size: 0.875rem;
    /* refined on mobile via variables */
    line-height: 1.35;
    /* padding: 0.35rem 0; */
    /* slim click area */
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--stn-radius);
    transition: background-color 0.2s ease, color 0.2s ease;
}

.mbnav-list a:hover,
.mbnav-list a:focus {
    background: var(--color-secondary);
    color: var(--text-on-primary);
    outline: none;
}

/* Make theme links look consistent */
.mbnav-menu .theme-option {
    font-weight: 500;
}

/* =========================================================
  10) Responsive Tweaks (≤768px)
   - Show mobile bar
   - Hide desktop header block
   - Slim UI variables for overlay
   - Additional desktop dropdown & layout tweaks for phones
   ========================================================= */


/* =========================================================
   Floating Buttons – Uniform Design (Menu bar + Back to Top)
   Uses the text icon ⬆︎
 (no pseudo-lines)
   ========================================================= */
/* Back-to-top FAB */
.uifab {
    --fab-size: 3.25rem;
    position: fixed;
    right: 5%;
    bottom: 2em;
    z-index: 1200;
    width: var(--fab-size);
    height: var(--fab-size);
    border-radius: 9999px;
    display: grid;
    place-items: center;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-secondary);
    color: var(--text-primary);
    box-shadow: var(--stn-shadow);
    /* hidden by default; JS toggles .uifab--show */
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity .2s ease, visibility .2s ease, transform .2s ease;
}

/* Text arrow icon ⬆︎
 */
.uifab .uifab-icon {
    font-size: 2rem;
    /* scales nicely in the circle */
    line-height: 1;
    display: inline-block;
    transform: translateY(-1px);
    /* optical centering */
}

/* show/hide states toggled by JS */
.uifab.uifab--show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.uifab.uifab--hidden,
.mobile-bottom-nav.is-hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(8px);
}

.mobile-bottom-nav.is-visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
    transition: opacity .2s ease, visibility .2s ease, transform .2s ease;
}

/* When the mobile menu overlay is open, hide the back-to-top to avoid overlap */
.mobile-bottom-nav.open~.mbnav-menu~.uifab,
.mobile-bottom-nav.open+.mbnav-menu+.uifab {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}