/* Shared shell geometry and the four canonical backdrop materials. */
:root {
    --site-theme-transition: 180ms ease;
    --Darkblur-background: transparent;
    --Darkblur-backdrop: blur(30px);
    --Darkblur-border: rgba(255, 255, 255, 0.08);

    --Darkblur_darker-background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), rgba(255, 255, 255, 0.10);
    --Darkblur_darker-backdrop: blur(28px) saturate(180%);
    --Darkblur_darker-border: rgba(255, 255, 255, 0.08);
    --Darkblur_darker-shadow: 0 16px 40px -10px rgba(0, 0, 0, 0.6);
    --Darkblur_darker-hover: rgba(255, 255, 255, 0.08);

    --Lightblur-background: transparent;
    --Lightblur-backdrop: blur(30px);
    --Lightblur-border: rgba(0, 0, 0, 0.08);

    --Lightblur_lighter-background: rgba(0, 0, 0, 0.10);
    --Lightblur_lighter-backdrop: blur(28px) saturate(180%);
    --Lightblur_lighter-border: rgba(0, 0, 0, 0.08);
    --Lightblur_lighter-shadow: 0 16px 40px -10px rgba(0, 0, 0, 0.1);
    --Lightblur_lighter-hover: rgba(0, 0, 0, 0.06);
}

html.theme-dark {
    --site-blur-normal-background: var(--Darkblur-background);
    --site-blur-normal-backdrop: var(--Darkblur-backdrop);
    --site-blur-normal-border: var(--Darkblur-border);
    --site-blur-strong-background: var(--Darkblur_darker-background);
    --site-blur-strong-backdrop: var(--Darkblur_darker-backdrop);
    --site-blur-strong-border: var(--Darkblur_darker-border);
    --site-blur-strong-shadow: var(--Darkblur_darker-shadow);
    --site-blur-strong-hover: var(--Darkblur_darker-hover);
}

html.theme-light {
    --site-blur-normal-background: var(--Lightblur-background);
    --site-blur-normal-backdrop: var(--Lightblur-backdrop);
    --site-blur-normal-border: var(--Lightblur-border);
    --site-blur-strong-background: var(--Lightblur_lighter-background);
    --site-blur-strong-backdrop: var(--Lightblur_lighter-backdrop);
    --site-blur-strong-border: var(--Lightblur_lighter-border);
    --site-blur-strong-shadow: var(--Lightblur_lighter-shadow);
    --site-blur-strong-hover: var(--Lightblur_lighter-hover);
}

/* Theme changes are deliberately brief and only animate visual color/material shifts. */
:root,
.site-home,
.site-page {
    transition: background-color var(--site-theme-transition), color var(--site-theme-transition);
}

/* Cached documents keep theme-loading until pageshow reapplies the full root
   state; the page-local loading rules suppress only transitions during that
   handoff, so navigation never leaves a blank page. */

html.theme-light .site-home .popup-overlay::before,
html.theme-light .site-page .popup-overlay::before {
    background: rgba(255, 255, 255, 0.34);
}

/* Shared shell text and its currentColor icons always follow the active foreground. */
.site-home .glass-btn,
.site-page .glass-btn,
.site-home .lang-option,
.site-page .lang-option,
.site-home .page-title,
.site-page .page-title,
.site-home .popup-title,
.site-page .popup-title,
.site-home .popup-tm,
.site-page .popup-tm,
.site-home .webring-btn,
.site-page .webring-btn,
.site-home .webring-label-bottom,
.site-page .webring-label-bottom,
.site-home .popup-footer-text,
.site-page .popup-footer-text,
.site-home .popup-close-btn,
.site-page .popup-close-btn,
.site-home .copyright,
.site-page .copyright {
    color: var(--text-color);
}

.site-home .glass-btn,
.site-page .glass-btn {
    transition: background-color var(--site-theme-transition), color var(--site-theme-transition), transform 0.1s cubic-bezier(0.4, 0, 0.2, 1);
}

.site-home .lang-option,
.site-page .lang-option {
    transition: background-color var(--site-theme-transition), border-color var(--site-theme-transition), color var(--site-theme-transition);
}

.site-home .popup-title,
.site-page .popup-title,
.site-home .popup-tm,
.site-page .popup-tm,
.site-home .webring-label-bottom,
.site-page .webring-label-bottom,
.site-home .popup-footer-text,
.site-page .popup-footer-text,
.site-home .copyright,
.site-page .copyright,
.site-page .page-title {
    transition: color var(--site-theme-transition);
}

.site-home .webring-btn,
.site-page .webring-btn {
    transition: background var(--site-theme-transition), border-color var(--site-theme-transition), color var(--site-theme-transition), transform 0.2s ease;
}

.site-home .popup-close-btn,
.site-page .popup-close-btn {
    transition: background-color var(--site-theme-transition), border-color var(--site-theme-transition), color var(--site-theme-transition);
}

.site-home #theme-toggle svg,
.site-page #theme-toggle svg {
    color: currentColor;
    fill: currentColor;
}

.site-home > header,
.site-page > header,
.site-blur-normal {
    background: var(--site-blur-normal-background);
    backdrop-filter: var(--site-blur-normal-backdrop);
    -webkit-backdrop-filter: var(--site-blur-normal-backdrop);
}

.site-home .niche-glass,
.site-page .niche-glass,
.site-home .lang-popup,
.site-page .lang-popup,
.site-home .bottom-footer,
.site-page .bottom-footer,
.site-home .side-bubble::before,
.site-page .side-bubble::before {
    background: var(--site-blur-strong-background);
    backdrop-filter: var(--site-blur-strong-backdrop);
    -webkit-backdrop-filter: var(--site-blur-strong-backdrop);
}

/* Every non-Index page shares this upper-shell geometry. */
.site-page > header {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
    height: 60px;
    flex-shrink: 0;
    z-index: 1500;
}

.site-page > header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100vw;
    height: 1.5px;
    background: var(--rain-chroma);
    background-size: 200% 100%;
    animation: rainbowFlow 1.2s linear infinite;
    box-shadow: 0 0 12px var(--glow-color), 0 0 24px var(--glow-color);
    z-index: 1000;
    pointer-events: none;
}

.site-page .page-title {
    position: absolute;
    left: 120px;
    bottom: 8px;
    z-index: 1501;
    margin: 0;
    padding: 0;
    line-height: 1;
    font-family: 'Nerdropol', sans-serif;
    font-size: 2rem;
    color: var(--text-color);
    text-transform: uppercase;
    white-space: nowrap;
    -webkit-font-smoothing: none;
    -moz-osx-font-smoothing: auto;
    text-rendering: optimizeSpeed;
    font-synthesis: none;
    transition: color var(--site-theme-transition);
}

.site-page .logo-wrapper {
    position: absolute;
    right: 2px;
    top: 50%;
    transform: translateY(-50%);
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    text-decoration: none;
    z-index: 1501;
}

.site-page .logo {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: opacity 0.3s ease;
}

.site-page .glass-btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 4px 0;
    border: 0;
    border-radius: 4px;
    background-color: transparent;
    color: var(--text-color);
    cursor: pointer;
    font: inherit;
    font-size: 0.7rem;
    text-decoration: none;
    text-transform: uppercase;
    white-space: nowrap;
    transition: background-color var(--site-theme-transition), color var(--site-theme-transition), transform 0.1s cubic-bezier(0.4, 0, 0.2, 1);
}

.site-page .glass-btn:hover { background-color: var(--site-blur-strong-hover); }
.site-page .glass-btn:active { transform: scale(0.95); }
.site-page .glass-btn.icon-btn { width: 24px; height: 24px; padding: 2px; border-radius: 50%; }

.site-page .services-back-divider:not(.is-visible),
.site-page .services-back-btn:not(.is-visible) { display: none; }

.site-page .services-back-divider.is-visible { display: block; }
.site-page .services-back-btn.is-visible { display: inline-flex; }

.site-page .pill-divider {
    width: 1px;
    height: 14px;
    flex-shrink: 0;
    margin: 0 10px;
    border-radius: 1px;
    background-color: var(--site-blur-strong-border);
    transition: background-color var(--site-theme-transition);
}

.site-page .top-niche-wrapper {
    position: relative;
    width: 100%;
    height: 0;
    flex-shrink: 0;
    z-index: 1000;
}

.site-page .niche-container {
    position: absolute;
    top: 0;
    height: 50px;
    display: flex;
    z-index: 102;
}

.site-page .left-niche { left: 0; }
.site-page .right-niche { right: 0; }

.site-page .niche-glass {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    transition: background var(--site-theme-transition);
}

.site-page .niche-stroke {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    overflow: visible;
    pointer-events: none;
    z-index: 2;
}

.site-page .niche-stroke path {
    stroke: var(--site-blur-strong-border);
    transition: stroke var(--site-theme-transition);
}

.site-page .niche-content {
    position: relative;
    display: inline-flex;
    align-items: center;
    width: max-content;
    height: 42px;
    pointer-events: auto;
    z-index: 4;
}

.site-page .left-niche .niche-content { padding-left: 20px; padding-right: 4px; }
.site-page .right-niche .niche-content { padding-left: 50px; padding-right: 10px; justify-content: flex-end; }
.site-page .lang-wrapper { position: relative; display: flex; align-items: center; }

.site-page .lang-popup {
    border-color: var(--site-blur-strong-border);
    box-shadow: var(--site-blur-strong-shadow);
}

/* WebRing and footer are one shared stronger material on every page. */
.site-home .side-bubble,
.site-page .side-bubble {
    position: fixed;
    right: auto;
    bottom: 55px;
    left: 0;
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    isolation: isolate;
    border: 0;
    border-radius: 0 24px 24px 0;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    box-shadow: none;
    cursor: pointer;
    transform: none;
    transform-origin: left center;
    transition: none;
    z-index: 100;
}

.site-home .side-bubble::before,
.site-page .side-bubble::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 0;
    border: 1px solid var(--site-blur-strong-border);
    border-left: 0;
    border-radius: inherit;
    box-shadow: var(--site-blur-strong-shadow);
    pointer-events: none;
    transition: background var(--site-theme-transition), border-color var(--site-theme-transition), box-shadow var(--site-theme-transition), opacity var(--site-theme-transition);
}

.site-home .side-bubble:hover,
.site-page .side-bubble:hover { transform: none; }

.site-home .side-bubble:hover::before,
.site-page .side-bubble:hover::before { background: var(--site-blur-strong-hover); }

.site-home .side-bubble img,
.site-page .side-bubble img {
    position: relative;
    width: 63px;
    height: 63px;
    object-fit: contain;
    opacity: 0.8;
    transition: opacity var(--site-theme-transition);
    z-index: 1;
}

html.theme-light .site-home .side-bubble img,
html.theme-light .site-page .side-bubble img { opacity: 0.7; }

html.theme-light .site-home .side-bubble:hover img,
html.theme-light .site-page .side-bubble:hover img { opacity: 0.9; }

.site-home .bottom-footer,
.site-page .bottom-footer {
    position: fixed;
    right: 0;
    bottom: 0;
    left: 0;
    width: 100vw;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 20px;
    border-top: 1px solid var(--site-blur-strong-border);
    box-shadow: none;
    transform: none;
    will-change: auto;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    z-index: 200;
}

.site-home .copyright,
.site-page .copyright {
    color: var(--text-color);
    font: inherit;
    font-size: 0.75rem;
    opacity: 0.5;
    pointer-events: none;
}

.site-page-links .links-wrapper {
    border-color: var(--site-blur-normal-border);
}

@media (max-width: 768px) {
    .site-page > header { height: 54px; }

    .site-page .logo-wrapper {
        right: 2px;
        width: 46px;
        height: 46px;
        z-index: 1501;
    }

    .site-page .page-title {
        top: auto;
        right: auto;
        bottom: 15px;
        left: 50%;
        max-width: calc(100vw - 106px);
        overflow: hidden;
        font-size: 1.28rem;
        line-height: 1;
        text-align: center;
        text-overflow: clip;
        transform: translateX(-50%);
    }

    .site-page .top-niche-wrapper {
        display: block;
        height: 0;
        border: 0;
        background: transparent;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }

    .site-page .niche-container { top: 0; height: 34px; z-index: 106; }
    .site-page .niche-content { height: 34px; }
    .site-page .left-niche .niche-content { height: 34px; padding-left: 14px; padding-right: 4px; }
    .site-page .right-niche .niche-content { height: 34px; padding-left: 40px; padding-right: 5px; gap: 6px; }
    .site-page #lang-btn { padding: 2px 6px; font-size: 0.6rem; }
    .site-page .glass-btn.icon-btn { width: 22px; height: 22px; padding: 3px; }
    .site-page .glass-btn.icon-btn svg { width: 14px; height: 14px; }
    .site-page .right-niche .pill-divider { height: 12px; margin: 0 4px; }

    .site-home .bottom-footer,
    .site-page .bottom-footer { height: 25px; }

    .site-home .copyright,
    .site-page .copyright { font-size: 0.65rem; }

    .site-home .side-bubble,
    .site-page .side-bubble {
        bottom: 45px;
        width: 60px;
        height: 60px;
        border-radius: 0 16px 16px 0;
    }

    .site-home .side-bubble img,
    .site-page .side-bubble img { width: 39px; height: 39px; }
}

@media (prefers-reduced-motion: reduce) {
    :root { --site-theme-transition: 0ms linear; }
}

@media (max-width: 360px) {
    .site-page .page-title { font-size: 1.05rem; }
}