/* ---------------------------------------------------------------------------
   FRCBOM loading system
   ---------------------------------------------------------------------------
   One branded loading language for the whole site: an isometric cube that
   assembles itself out of three faces (the same cube that sits in the navbar),
   shimmering skeletons that match the real layout, and a navigation progress
   bar. No dependencies — pure CSS so it paints before any JS/fonts land.

   Everything here is namespaced `frc-` and driven by static/loading.js.
   --------------------------------------------------------------------------- */

:root {
    --frc-load-accent: #6366f1;
    --frc-load-accent-soft: #818cf8;
    --frc-load-text: #cbd5e1;
    --frc-load-muted: #64748b;
    --frc-load-skel: rgba(148, 163, 184, 0.08);
    --frc-load-skel-hi: rgba(148, 163, 184, 0.16);
}

/* ---------------------------------------------------------------- the mark */

.frc-cube {
    display: block;
    width: 3.25rem;
    height: 3.25rem;
    overflow: visible;
    flex: none;
}

.frc-cube-sm { width: 1.15rem; height: 1.15rem; }
.frc-cube-md { width: 2.25rem; height: 2.25rem; }
.frc-cube-lg { width: 4.5rem; height: 4.5rem; }

/* Each face flies in from the direction it belongs to, holds while the
   assembly is "together", then flies back out — a BOM assembling itself. */
.frc-cube .frc-face {
    animation: frc-assemble 1.8s cubic-bezier(0.34, 0.9, 0.28, 1) infinite;
}

.frc-cube .frc-face-top   { animation-delay: 0s;     --frc-dx: 0px;    --frc-dy: -16px; }
.frc-cube .frc-face-left  { animation-delay: 0.11s;  --frc-dx: -16px;  --frc-dy: 9px; }
.frc-cube .frc-face-right { animation-delay: 0.22s;  --frc-dx: 16px;   --frc-dy: 9px; }

@keyframes frc-assemble {
    0%   { opacity: 0; transform: translate(var(--frc-dx), var(--frc-dy)); }
    26%  { opacity: 1; transform: translate(0, 0); }
    68%  { opacity: 1; transform: translate(0, 0); }
    100% { opacity: 0; transform: translate(var(--frc-dx), var(--frc-dy)); }
}

/* Soft glow under the cube so it reads as "working", not stalled. */
.frc-cube-wrap {
    position: relative;
    display: grid;
    place-items: center;
}

.frc-cube-wrap::after {
    content: "";
    position: absolute;
    width: 62%;
    height: 0.4rem;
    bottom: -0.15rem;
    border-radius: 9999px;
    background: radial-gradient(closest-side, rgba(99, 102, 241, 0.45), transparent);
    animation: frc-glow 1.8s ease-in-out infinite;
}

.frc-cube-sm + .frc-cube-glow, .frc-cube-wrap.frc-no-glow::after { display: none; }

@keyframes frc-glow {
    0%, 100% { opacity: 0.15; transform: scaleX(0.6); }
    40%      { opacity: 0.7;  transform: scaleX(1); }
}

/* ------------------------------------------------------------- loader block */

.frc-load {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.85rem;
    padding: 2.75rem 1rem;
    text-align: center;
}

.frc-load-row {
    flex-direction: row;
    gap: 0.6rem;
    padding: 0.35rem 0;
    text-align: left;
}

.frc-load-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--frc-load-text);
    letter-spacing: 0.01em;
}

.frc-load-sub {
    font-size: 0.75rem;
    color: var(--frc-load-muted);
    margin-top: -0.5rem;
    min-height: 1rem;
    font-variant-numeric: tabular-nums;
}

.frc-load-row .frc-load-sub { margin-top: 0; }

/* Indeterminate track — the "still working" signal when a fetch runs long. */
.frc-load-bar {
    position: relative;
    width: 9.5rem;
    height: 3px;
    border-radius: 9999px;
    background: rgba(148, 163, 184, 0.14);
    overflow: hidden;
}

.frc-load-bar::after {
    content: "";
    position: absolute;
    inset: 0;
    width: 40%;
    border-radius: 9999px;
    background: linear-gradient(90deg, transparent, var(--frc-load-accent-soft), transparent);
    animation: frc-track 1.25s ease-in-out infinite;
}

@keyframes frc-track {
    0%   { transform: translateX(-100%); }
    100% { transform: translateX(250%); }
}

/* Determinate variant used while a big list paints in chunks. */
.frc-load-bar[data-frc-progress]::after {
    animation: none;
    width: var(--frc-pct, 0%);
    background: linear-gradient(90deg, var(--frc-load-accent), #38bdf8);
    transition: width 0.15s linear;
}

/* ----------------------------------------------------------------- overlay */

.frc-overlay {
    position: absolute;
    inset: 0;
    z-index: 40;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: inherit;
    background: rgba(6, 8, 15, 0.72);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    animation: frc-fade-in 0.18s ease-out;
}

.frc-overlay-fixed {
    position: fixed;
    z-index: 9998;
    border-radius: 0;
}

.frc-overlay-host { position: relative; }

@keyframes frc-fade-in {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* --------------------------------------------------------------- skeletons */

.frc-skel {
    position: relative;
    overflow: hidden;
    background: var(--frc-load-skel);
    border-radius: 0.375rem;
}

.frc-skel::after {
    content: "";
    position: absolute;
    inset: 0;
    transform: translateX(-100%);
    background: linear-gradient(90deg, transparent, var(--frc-load-skel-hi), transparent);
    animation: frc-shimmer 1.5s ease-in-out infinite;
}

@keyframes frc-shimmer {
    100% { transform: translateX(100%); }
}

.frc-skel-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(22rem, 1fr));
}

.frc-skel-card {
    border: 1px solid #1f2937;
    border-radius: 0.75rem;
    background: rgba(15, 23, 42, 0.6);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.frc-skel-card-head { display: flex; gap: 0.75rem; align-items: center; }
.frc-skel-thumb { width: 3.5rem; height: 3.5rem; border-radius: 0.5rem; flex: none; }
.frc-skel-line { height: 0.6rem; border-radius: 9999px; }
.frc-skel-chips { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.frc-skel-chip { height: 1.15rem; width: 4rem; border-radius: 9999px; }
.frc-skel-block { height: 2.25rem; border-radius: 0.5rem; }

.frc-skel-rows { display: flex; flex-direction: column; gap: 0.55rem; }
.frc-skel-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.55rem 0.25rem;
    border-bottom: 1px solid rgba(31, 41, 55, 0.7);
}

.frc-skel-kanban { display: flex; gap: 0.75rem; overflow: hidden; }
.frc-skel-kanban-col {
    flex: 1 0 15rem;
    border: 1px solid #1f2937;
    border-radius: 0.75rem;
    background: rgba(15, 23, 42, 0.5);
    padding: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

/* Staggered shimmer so a wall of skeletons ripples instead of strobing. */
.frc-skel-card:nth-child(2n) .frc-skel::after,
.frc-skel-row:nth-child(2n) .frc-skel::after,
.frc-skel-kanban-col:nth-child(2n) .frc-skel::after { animation-delay: 0.18s; }
.frc-skel-card:nth-child(3n) .frc-skel::after,
.frc-skel-row:nth-child(3n) .frc-skel::after,
.frc-skel-kanban-col:nth-child(3n) .frc-skel::after { animation-delay: 0.36s; }

/* ------------------------------------------------- navigation progress bar */

#frcTopProgress {
    position: fixed;
    top: 0;
    left: 0;
    height: 2.5px;
    width: 0;
    z-index: 10000;
    pointer-events: none;
    opacity: 0;
    border-radius: 0 2px 2px 0;
    background: linear-gradient(90deg, var(--frc-load-accent), #38bdf8);
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.8);
    transition: width 0.25s ease-out, opacity 0.25s ease-out;
}

#frcTopProgress.frc-on { opacity: 1; }

/* Corner pill: only appears once a navigation is slow enough to feel like a
   freeze, so quick page loads stay visually silent. */
#frcNavPill {
    position: fixed;
    right: 1rem;
    bottom: 1rem;
    z-index: 10000;
    display: flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.55rem 0.9rem 0.55rem 0.7rem;
    border-radius: 9999px;
    border: 1px solid #1f2937;
    background: rgba(15, 23, 42, 0.92);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
    color: var(--frc-load-text);
    font-size: 0.8125rem;
    font-weight: 500;
    opacity: 0;
    transform: translateY(0.5rem);
    transition: opacity 0.2s ease, transform 0.2s ease;
    pointer-events: none;
}

#frcNavPill.frc-on { opacity: 1; transform: translateY(0); }

/* ------------------------------------------------------------ busy buttons */

.frc-busy {
    position: relative;
    opacity: 0.75;
    cursor: progress !important;
    pointer-events: none;
}

.frc-btn-spinner {
    display: inline-block;
    width: 0.85em;
    height: 0.85em;
    margin-right: 0.4em;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    vertical-align: -0.1em;
    animation: frc-spin 0.65s linear infinite;
}

@keyframes frc-spin {
    to { transform: rotate(360deg); }
}

/* Anything mid-load shouldn't accept clicks that will be thrown away. */
[aria-busy="true"] .frc-load-target { pointer-events: none; }

/* --------------------------------------------------------- reduced motion */

@media (prefers-reduced-motion: reduce) {
    .frc-cube .frc-face {
        animation: frc-pulse 1.6s ease-in-out infinite;
        transform: none;
    }
    .frc-cube-wrap::after,
    .frc-skel::after,
    .frc-btn-spinner { animation-duration: 2.4s; }
    .frc-load-bar::after { animation-duration: 2.4s; }
    @keyframes frc-pulse {
        0%, 100% { opacity: 0.45; }
        50%      { opacity: 1; }
    }
}