/* Seamless loop maker. Built on the simpleSPU page's stickers, keys and tags
   (/simplespu/retro.css), laid out as three numbered steps. */

.loop-page [hidden] { display: none !important; }

/* ── Intro ── */
main > section.loop-intro {
    display: grid;
    justify-items: start;
    gap: 16px;
    max-width: 860px;
    padding-bottom: 36px;
}

.loop-intro .section-text { max-width: 40em; }

/* ── The three steps ── */
main > section.loop-app {
    display: grid;
    gap: 28px;
    max-width: 860px;
    padding-top: 0;
}

.loop-step {
    display: grid;
    gap: 20px;
    padding: 28px;
    transition: opacity 0.2s ease;
}

/* Steps 2 and 3 wait for a file. */
.loop-step.is-locked { opacity: 0.45; }
.loop-step.is-locked .loop-split,
.loop-step.is-locked .loop-screen,
.loop-step.is-locked .loop-seam,
.loop-step.is-locked .loop-download-row,
.loop-step.is-locked .loop-more { display: none; }

.loop-step-head {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: start;
    gap: 16px;
}

.loop-step-head h2 { font-size: clamp(1.3rem, 2.6vw, 1.7rem); }

.loop-step-num {
    display: grid;
    place-items: center;
    width: 46px;
    height: 46px;
    font: 400 1.35rem/1 var(--font-display);
    color: var(--ink);
    background: var(--accent);
    border: var(--line) solid var(--ink);
    border-radius: 10px;
    box-shadow: 0 3px 0 var(--ink);
}

#loop-step-length .loop-step-num { background: var(--teal-light); }
#loop-step-result .loop-step-num { background: var(--cream); }

.loop-step-help { margin-top: 6px; color: var(--muted); }
.loop-step-help strong { color: var(--text); }

/* ── Step 1: drop zone ── */
.loop-drop {
    display: grid;
    justify-items: center;
    gap: 14px;
    padding: 32px 20px;
    text-align: center;
    background: var(--panel-raised);
    border: var(--line) dashed var(--ink);
    border-radius: var(--radius);
    cursor: pointer;
    transition: background-color 0.15s ease, padding 0.2s ease;
}

.loop-drop.is-dragging { background: var(--teal-light); }

.loop-drop-icon {
    width: 36px;
    height: 40px;
    color: var(--teal);
}

.loop-drop.is-dragging .loop-drop-icon { color: var(--ink); }

.loop-drop-title { font-weight: 700; font-size: 1.1rem; }

.loop-drop-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}

/* Once a file is in, the drop zone shrinks to a "change file" strip. */
.loop-drop.is-compact {
    grid-template-columns: auto minmax(0, 1fr);
    justify-items: start;
    align-items: center;
    padding: 14px 18px;
    text-align: left;
}

.loop-drop.is-compact .loop-drop-icon { display: none; }
.loop-drop.is-compact .loop-drop-title { font-size: 1rem; }
.loop-drop.is-compact .loop-drop-actions { grid-column: 1 / -1; justify-content: flex-start; }

.loop-loaded {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-weight: 500;
}

.loop-loaded::before {
    content: "";
    flex: none;
    width: 14px;
    height: 12px;
    margin-top: 0.35em;
    background: var(--ok);
    mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 7 6'%3E%3Cpath d='M6 0h1v1H6zM5 1h2v1H5zM0 2h1v1H0zM4 2h2v1H4zM0 3h2v1H0zM3 3h2v1H3zM1 4h3v1H1zM2 5h1v1H2z'/%3E%3C/svg%3E") center / contain no-repeat;
}

/* ── Fields ── */
.loop-big-fields {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
    max-width: 520px;
}

.loop-field {
    display: grid;
    gap: 6px;
    font-weight: 700;
}

.loop-field input,
.loop-field select {
    min-width: 0;
    width: 100%;
    font: 700 1.6rem/1.2 var(--font-body);
    color: var(--ink);
    background: var(--cream);
    border: var(--line) solid var(--ink);
    border-radius: 10px;
    padding: 10px 14px 9px;
    box-shadow: 0 4px 0 var(--ink);
}

.loop-field-small { font-weight: 500; font-size: 0.95rem; }
.loop-field-small input,
.loop-field-small select { font-size: 1rem; padding: 10px 12px 9px; max-width: 260px; }

.loop-guess { color: var(--muted); font-size: 0.95rem; margin-top: -6px; }
.loop-guess strong { color: var(--text); }

/* ── Step 2: the loop and its tail, to scale ── */
.loop-split { display: grid; gap: 8px; }

.loop-split-bar {
    display: flex;
    height: 34px;
    overflow: hidden;
    border: var(--line) solid var(--ink);
    border-radius: 8px;
    background: var(--track);
}

.loop-split-loop {
    background: var(--teal);
    background-image: repeating-linear-gradient(90deg, transparent 0 calc(var(--bar-width, 100%) - 2px), rgba(20, 17, 26, 0.35) calc(var(--bar-width, 100%) - 2px) var(--bar-width, 100%));
}

.loop-split-tail {
    background: var(--accent-light);
    border-left: var(--line) solid var(--ink);
}

.loop-split-labels {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    font-size: 0.9rem;
    font-weight: 700;
}

.loop-split-labels span:first-child { color: var(--teal); white-space: nowrap; }
.loop-split-labels span:last-child { color: var(--accent-dark); text-align: right; }

@media (prefers-color-scheme: dark) {
    .loop-split-labels span:first-child { color: var(--teal-light); }
    .loop-split-labels span:last-child { color: var(--accent-light); }
}

.loop-summary { color: var(--muted); font-size: 0.95rem; }

.loop-note {
    padding: 12px 14px;
    font-weight: 500;
    background: var(--cream);
    color: var(--ink);
    border: var(--line) solid var(--ink);
    border-radius: 10px;
}

.loop-note[data-tone="error"] { background: #ffd9cb; }

/* ── Details: extra settings out of the way ── */
.loop-more {
    border-top: var(--line) dashed var(--dim);
    padding-top: 14px;
}

.loop-more > summary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    cursor: pointer;
    list-style: none;
}

.loop-more > summary::-webkit-details-marker { display: none; }

.loop-more > summary::before {
    content: "";
    width: 10px;
    height: 10px;
    background: currentColor;
    clip-path: polygon(0 0, 100% 50%, 0 100%);
    transition: transform 0.15s ease;
}

.loop-more[open] > summary::before { transform: rotate(90deg); }

.loop-more-body {
    display: grid;
    gap: 16px;
    margin-top: 16px;
}

.loop-check {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
}

.loop-check input { width: 20px; height: 20px; accent-color: var(--accent); }

.loop-tags-wrap { display: grid; gap: 6px; font-size: 0.95rem; color: var(--muted); }

.loop-tags-wrap code {
    justify-self: start;
    max-width: 100%;
    overflow-x: auto;
    padding: 8px 12px;
    font-size: 0.9rem;
    color: var(--screen-text);
    background: var(--screen);
    border: var(--line) solid var(--ink);
    border-radius: 8px;
    white-space: nowrap;
}

/* ── Step 3: the seam on a little teal screen ── */
.loop-screen {
    --wave-color: var(--screen-text);
    --seam-color: var(--accent);
    position: relative;
    padding: 12px 12px 8px;
    background: var(--screen);
    border: var(--line) solid var(--ink);
    border-radius: var(--radius);
    box-shadow: inset 0 0 0 3px rgba(0, 0, 0, 0.18);
}

.loop-wave {
    width: 100%;
    height: 110px;
}

/* The whole loop, with a playhead you can drag. */
.loop-overview {
    position: relative;
    margin: 6px 0 2px;
    cursor: ew-resize;
    touch-action: none;
    border-radius: 6px;
    background: rgba(0, 0, 0, 0.16);
}

.loop-overview:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.loop-overview-wave {
    width: 100%;
    height: 64px;
}

.loop-zoom { position: relative; margin-top: 14px; }

.loop-playhead {
    position: absolute;
    top: -4px;
    bottom: -4px;
    left: 0;
    width: 3px;
    margin-left: -1.5px;
    background: var(--cream);
    box-shadow: 0 0 0 1px var(--ink);
    pointer-events: none;
}

/* A little grip on top, so it reads as something to grab. */
.loop-overview .loop-playhead::before {
    content: "";
    position: absolute;
    top: -6px;
    left: 50%;
    width: 13px;
    height: 10px;
    margin-left: -6.5px;
    background: var(--cream);
    border: 1.5px solid var(--ink);
    border-radius: 3px;
}

.loop-overview.is-dragging .loop-playhead,
.loop-overview.is-dragging .loop-playhead::before { background: var(--accent-light); }

.loop-zoom-playhead { top: 0; bottom: 0; }

.loop-screen-hint {
    font-size: 0.78rem;
    color: var(--screen-text);
    opacity: 0.7;
}

.loop-wave-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 6px;
    font: 400 0.68rem/1 var(--font-display);
    text-transform: lowercase;
    color: var(--screen-text);
    opacity: 0.75;
    gap: 8px;
}

#loop-time { font: 700 0.8rem/1 var(--font-body); font-variant-numeric: tabular-nums; }

.loop-play {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.loop-key-icon { width: 10px; height: 14px; }

.key[aria-pressed="true"] { background: var(--teal-light); }

.loop-seam { padding: 12px 16px 14px; }
.loop-seam-text { font-size: 0.97rem; line-height: 1.45; }
.loop-seam[data-tone="warn"] { background: linear-gradient(160deg, #b5523c 0%, #8a2f22 45%, #4a1410 100%); }

.loop-download-row {
    display: grid;
    justify-items: start;
    gap: 10px;
}

.loop-download {
    font-size: 1.12rem;
    padding: 16px 26px 15px;
    white-space: normal;
    text-align: left;
}

.loop-download .btn-icon { width: 18px; height: 18px; }

.loop-peak { color: var(--muted); font-size: 0.92rem; }
.loop-peak[data-tone="error"] { color: var(--accent-dark); font-weight: 700; }

/* ── Content below the tool ── */
.loop-engine-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.loop-guides { margin-top: 28px; color: var(--muted); }
.loop-guides a, .loop-more-link a { color: var(--link); font-weight: 700; }
.loop-more-link { font-size: 0.95rem; }

/* The mascot here is a still poster, not the live model. */
.loop-stage { cursor: default; }

@media (max-width: 860px) {
    .stage-download.loop-stage { min-height: 300px; }
}

@media (max-width: 640px) {
    .loop-step { padding: 20px; gap: 18px; }
    .loop-step-num { width: 38px; height: 38px; font-size: 1.1rem; }
    .loop-step-head { gap: 12px; }
    .loop-drop { padding: 24px 16px; }
    .loop-drop-actions, .loop-drop-actions > * { width: 100%; }
    .loop-big-fields { gap: 12px; }
    .loop-field input { font-size: 1.35rem; }
    .loop-play > *, .loop-download { width: 100%; }
    .loop-download { justify-content: center; }
    .loop-wave { height: 96px; }
    .loop-zoom + .loop-wave-labels span:nth-child(2) { display: none; }
    .loop-engine-grid { grid-template-columns: minmax(0, 1fr); }
}