/* StructureStyles.css - Panel structure and layout */

/* Reset */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    block-size: 100vh;
    inline-size: 100vw;
    overflow: hidden;
}

body {
    block-size: 100vh;
    inline-size: 100vw;
    overflow: hidden;
    background-color: var(--unb-bg-primary, #0a0a12);
    color: var(--unb-text-primary, #e8e8f0);
    font-family: var(--unb-font-family, system-ui, sans-serif);
    font-size: var(--unb-font-size, 15px);
    line-height: var(--unb-line-height, 1.5);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Panel root */
.UnB-Panel {
    display: grid;
    grid-template-columns: auto 1fr auto;
    grid-template-rows: auto 1fr auto;
    grid-template-areas:
        "header header header"
        "sidebar-start display sidebar-end"
        "footer footer footer";
    block-size: 100vh;
    inline-size: 100vw;
    overflow: hidden;
}

/* Header zone */
.UnB-Header {
    grid-area: header;
    display: flex;
    align-items: center;
    justify-content: space-between;
    block-size: var(--unb-header-height, calc(var(--unb-vh-unit) * 1.5));
    padding-inline: var(--unb-panel-padding, 1em);
    padding-block: var(--unb-panel-gap, 0.5em);
    gap: var(--unb-panel-gap, 1em);
}

.UnB-Header-Zone {
    display: flex;
    align-items: center;
    gap: var(--unb-panel-gap, 1em);
}

.UnB-Header-Start {
    justify-content: flex-start;
}

.UnB-Header-Center {
    justify-content: center;
    flex: 1;
}

.UnB-Header-End {
    justify-content: flex-end;
}

/* Sidebars */
.UnB-Sidebar {
    display: flex;
    flex-direction: column;
    block-size: 100%;
    inline-size: var(--unb-sidebar-width, calc(var(--unb-vw-unit) * 4));
    overflow-x: hidden;
    overflow-y: auto;
    padding: var(--unb-panel-padding, 1em);
    gap: var(--unb-panel-gap, 1em);
    transition: inline-size var(--unb-transition-duration, 300ms) ease-out,
                opacity var(--unb-transition-duration, 300ms) ease-out;
}

.UnB-Sidebar-Start {
    grid-area: sidebar-start;
    border-inline-end: 1px solid var(--unb-border-color, rgba(255, 255, 255, 0.1));
}

.UnB-Sidebar-End {
    grid-area: sidebar-end;
    border-inline-start: 1px solid var(--unb-border-color, rgba(255, 255, 255, 0.1));
}

.UnB-Sidebar.is-hidden {
    inline-size: 0;
    opacity: 0;
    overflow: hidden;
}

/* Display area */
.UnB-Display {
    grid-area: display;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

.UnB-Display-Content {
    flex: 1;
    overflow-x: hidden;
    overflow-y: auto;
    padding: var(--unb-panel-padding, 1em);
    padding-block-start: 0;
}

/* Footer zone */
.UnB-Footer {
    grid-area: footer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    block-size: var(--unb-footer-height, calc(var(--unb-vh-unit) * 0.75));
    padding-inline: var(--unb-panel-padding, 1em);
    gap: var(--unb-panel-gap, 1em);
}

.UnB-Footer-Zone {
    display: flex;
    align-items: center;
    gap: var(--unb-panel-gap, 1em);
}

.UnB-Footer-Start {
    justify-content: flex-start;
}

.UnB-Footer-Center {
    justify-content: center;
    flex: 1;
}

.UnB-Footer-End {
    justify-content: flex-end;
}

/* Overlay container */
.UnB-Overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--unb-transition-duration, 300ms) ease-out;
}

.UnB-Overlay:not([hidden]) {
    opacity: 1;
    visibility: visible;
}

/* Loading overlay specific */
.UnB-Loading-Overlay {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1em;
    min-block-size: 100%;
    min-inline-size: 100%;
}

/* Layout utilities */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.flex-row {
    flex-direction: row;
}

.flex-wrap {
    flex-wrap: wrap;
}

.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }

.gap-xs { gap: calc(var(--unb-gap, 8px) * 0.25); }
.gap-sm { gap: calc(var(--unb-gap, 8px) * 0.5); }
.gap-md { gap: var(--unb-gap, 8px); }
.gap-lg { gap: calc(var(--unb-gap, 8px) * 1.5); }
.gap-xl { gap: calc(var(--unb-gap, 8px) * 2); }

.flex-1 { flex: 1; }
.flex-auto { flex: auto; }
.flex-none { flex: none; }

.hidden { display: none !important; }
.visible { visibility: visible !important; }
.invisible { visibility: hidden !important; }

/* Scrollbar styling */
::-webkit-scrollbar {
    inline-size: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--unb-scrollbar-thumb, rgba(255, 255, 255, 0.2));
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--unb-scrollbar-thumb-hover, rgba(255, 255, 255, 0.4));
}