/* ============================================================================
   File Splitter + File Joiner - shared styles (2026-10-12)  prefix: fsp-
   Loaded by /file-splitter/ and /file-joiner/ from /file-splitter/.
   Light is the default, dark follows [data-theme="dark"].
   Related tools, FAQ and the numbered steps come from styles/custom_styles.css.
   ========================================================================== */

.fsp {
    --fsp-accent: #339966;
    --fsp-accent-strong: #2a7d54;
    --fsp-accent-soft: rgba(51, 153, 102, 0.1);
    --fsp-accent-line: rgba(51, 153, 102, 0.35);
    --fsp-btn: #2a7d54;
    --fsp-btn-hover: #226845;
    --fsp-bg: var(--card-bg, #ffffff);
    --fsp-bg2: var(--card-secondary, #f8f9fa);
    --fsp-bg3: #f1f5f4;
    --fsp-border: var(--border-color, #e0e0e0);
    --fsp-text: var(--text-primary, #333333);
    --fsp-text2: var(--text-secondary, #555555);
    --fsp-muted: var(--text-muted, #666666);
    --fsp-warn: #b45309;
    --fsp-warn-bg: #fff7e6;
    --fsp-warn-line: #f5c46b;
    --fsp-info: #1f6f99;
    --fsp-info-bg: #eef7fc;
    --fsp-info-line: #b8dcef;
    --fsp-err: #c0392b;
    --fsp-err-bg: #fdecea;
    --fsp-switch-off: #cbd5e1;
    --fsp-radius: 12px;
    --fsp-radius-sm: 8px;
    --tool-accent: #339966;
}
[data-theme="dark"] .fsp {
    --fsp-accent: #4cc38a;
    --fsp-accent-strong: #6fd3a2;
    --fsp-accent-soft: rgba(76, 195, 138, 0.12);
    --fsp-accent-line: rgba(76, 195, 138, 0.4);
    --fsp-btn: #2a7d54;
    --fsp-btn-hover: #31915f;
    --fsp-bg: var(--card-bg, #1e293b);
    --fsp-bg2: #172133;
    --fsp-bg3: #233046;
    --fsp-border: rgba(255, 255, 255, 0.1);
    --fsp-text: var(--text-primary, #f1f5f9);
    --fsp-text2: var(--text-secondary, #cbd5e1);
    --fsp-muted: var(--text-muted, #94a3b8);
    --fsp-warn: #fbbf24;
    --fsp-warn-bg: rgba(251, 191, 36, 0.1);
    --fsp-warn-line: rgba(251, 191, 36, 0.35);
    --fsp-info: #7cc4ea;
    --fsp-info-bg: rgba(51, 153, 204, 0.12);
    --fsp-info-line: rgba(124, 196, 234, 0.3);
    --fsp-err: #f87171;
    --fsp-err-bg: rgba(248, 113, 113, 0.12);
    --fsp-switch-off: #475569;
    --tool-accent: #4cc38a;
}

.fsp [hidden] { display: none !important; }
.fsp *, .fsp *::before, .fsp *::after { box-sizing: border-box; }
body.fsp-noscroll { overflow: hidden; }

/* ---------- header ---------- */
.fsp .fsp-title { display: flex; align-items: center; justify-content: center; gap: 0.6rem; color: var(--fsp-accent); }
.fsp .fsp-title svg, .fsp .fsp-title i { width: 34px; height: 34px; display: block; flex-shrink: 0; transform: translateY(0.09em); color: var(--fsp-accent); }
.fsp .tool-description a { color: var(--fsp-accent-strong); font-weight: 600; text-decoration: none; }
.fsp .tool-description a:hover { text-decoration: underline; }

/* ---------- cards ---------- */
.fsp-main { margin-top: 1.5rem; }
.fsp-card { background: var(--fsp-bg); border: 1px solid var(--fsp-border); border-radius: var(--fsp-radius); padding: 1.1rem; margin-bottom: 1rem; color: var(--fsp-text); }
.fsp-caption { display: inline-flex; align-items: center; gap: 0.35rem; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; color: var(--fsp-muted); }
.fsp-caption svg { width: 14px; height: 14px; color: var(--fsp-accent); }
.fsp-muted { color: var(--fsp-muted); }
.fsp-small { font-size: 0.75rem; color: var(--fsp-muted); }
.fsp code { font-size: 0.85em; padding: 0.05rem 0.3rem; border-radius: 4px; background: var(--fsp-bg3); color: var(--fsp-text); overflow-wrap: anywhere; }
.fsp-feature code { white-space: nowrap; }

/* ---------- upload ---------- */
.fsp-upload { padding: 1.25rem; }
.fsp-drop { display: flex; flex-direction: column; align-items: center; gap: 0.45rem; padding: 2.4rem 1rem; border: 2px dashed var(--fsp-accent-line); border-radius: var(--fsp-radius); background: var(--fsp-accent-soft); text-align: center; cursor: pointer; transition: border-color 0.2s, background-color 0.2s, transform 0.2s; }
.fsp-drop:hover, .fsp-drop.drag { border-color: var(--fsp-accent); background: rgba(51, 153, 102, 0.16); }
.fsp-drop.drag { transform: scale(1.01); }
.fsp-drop:focus-within { outline: 2px solid var(--fsp-accent); outline-offset: 3px; }
.fsp-drop-icon { width: 64px; height: 64px; border-radius: 50%; display: grid; place-items: center; background: var(--fsp-bg); color: var(--fsp-accent); border: 1px solid var(--fsp-accent-line); margin-bottom: 0.3rem; }
.fsp-drop-icon svg { width: 30px; height: 30px; }
.fsp-drop-title { font-size: 1.1rem; color: var(--fsp-text); }
.fsp-link { color: var(--fsp-accent-strong); text-decoration: underline; text-underline-offset: 3px; }
.fsp-drop-sub { font-size: 0.88rem; color: var(--fsp-text2); }
.fsp-types { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.35rem; margin-top: 0.4rem; }
.fsp-types span { font-size: 0.7rem; font-weight: 700; padding: 0.2rem 0.5rem; border-radius: 999px; background: var(--fsp-bg); border: 1px solid var(--fsp-border); color: var(--fsp-text2); }
.fsp-samples { margin-top: 1rem; display: flex; flex-direction: column; gap: 0.45rem; align-items: center; text-align: center; }
.fsp-sample-row { display: flex; flex-wrap: wrap; gap: 0.45rem; justify-content: center; }
.fsp-chip-btn { display: inline-flex; align-items: center; gap: 0.35rem; padding: 0.4rem 0.75rem; border-radius: 999px; border: 1px solid var(--fsp-border); background: var(--fsp-bg2); color: var(--fsp-text2); font: inherit; font-size: 0.8rem; font-weight: 600; cursor: pointer; transition: border-color 0.2s, color 0.2s; }
.fsp-chip-btn:hover { border-color: var(--fsp-accent); color: var(--fsp-accent-strong); }
.fsp-chip-btn:disabled { opacity: 0.6; cursor: progress; }
.fsp-chip-btn svg { width: 15px; height: 15px; color: var(--fsp-accent); }
.fsp-sample-note { margin: 0; font-size: 0.78rem; color: var(--fsp-muted); }
.fsp-pills { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.5rem 1.2rem; margin-top: 1rem; }
.fsp-pill { display: inline-flex; align-items: center; gap: 0.35rem; font-size: 0.8rem; color: var(--fsp-text2); }
.fsp-pill svg { width: 16px; height: 16px; color: var(--fsp-accent); }

/* ---------- workspace ---------- */
.fsp-work { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr); gap: 1rem; align-items: start; }
.fsp-col { min-width: 0; }
.fsp-card-head { display: flex; align-items: center; justify-content: space-between; gap: 0.6rem; margin-bottom: 0.6rem; }
.fsp-card-title { display: inline-flex; align-items: center; gap: 0.4rem; font-weight: 700; font-size: 0.95rem; color: var(--fsp-text); min-width: 0; }
.fsp-card-title svg { width: 18px; height: 18px; color: var(--fsp-accent); flex-shrink: 0; }
.fsp-text-btn { display: inline-flex; align-items: center; gap: 0.3rem; padding: 0.35rem 0.6rem; border: 1px solid transparent; border-radius: var(--fsp-radius-sm); background: none; color: var(--fsp-accent-strong); font: inherit; font-size: 0.8rem; font-weight: 600; cursor: pointer; white-space: nowrap; }
.fsp-text-btn:hover { background: var(--fsp-accent-soft); }
.fsp-text-btn svg { width: 15px; height: 15px; }
.fsp-icon-btn { display: inline-grid; place-items: center; width: 32px; height: 32px; flex-shrink: 0; border: 1px solid var(--fsp-border); border-radius: var(--fsp-radius-sm); background: var(--fsp-bg); color: var(--fsp-muted); cursor: pointer; padding: 0; transition: color 0.2s, border-color 0.2s, background-color 0.2s; }
.fsp-icon-btn:hover { color: var(--fsp-accent-strong); border-color: var(--fsp-accent); }
.fsp-icon-btn svg { width: 16px; height: 16px; }

/* safety + guard callouts */
.fsp-guard { display: flex; gap: 0.6rem; align-items: flex-start; padding: 0.75rem 0.85rem; border-radius: var(--fsp-radius-sm); font-size: 0.83rem; line-height: 1.55; margin-bottom: 1rem; border: 1px solid; }
.fsp-guard > svg { width: 18px; height: 18px; flex-shrink: 0; margin-top: 0.1rem; }
.fsp-guard a { color: inherit; font-weight: 700; }
.is-warn.fsp-guard { background: var(--fsp-warn-bg); border-color: var(--fsp-warn-line); color: var(--fsp-text); }
.is-warn.fsp-guard > svg { color: var(--fsp-warn); }
.is-info.fsp-guard { background: var(--fsp-info-bg); border-color: var(--fsp-info-line); color: var(--fsp-text); }
.is-info.fsp-guard > svg { color: var(--fsp-info); }
.fsp-guard { margin: 0.75rem 0 0; }

/* ---------- settings column ---------- */
.fsp-presets, .fsp-opt-block, .fsp-adv, .fsp-summary { background: var(--fsp-bg); border: 1px solid var(--fsp-border); border-radius: var(--fsp-radius); margin-bottom: 0.875rem; color: var(--fsp-text); }
.fsp-presets { padding: 0.8rem 0.9rem; }
.fsp-presets-head { display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; margin-bottom: 0.55rem; }
.fsp-save-btn { display: inline-flex; align-items: center; gap: 0.25rem; padding: 0.25rem 0.6rem; border: 1px solid var(--fsp-border); border-radius: 999px; background: var(--fsp-bg2); color: var(--fsp-text2); font: inherit; font-size: 0.73rem; font-weight: 600; cursor: pointer; }
.fsp-save-btn:hover { border-color: var(--fsp-accent); color: var(--fsp-accent-strong); }
.fsp-save-btn svg { width: 13px; height: 13px; }
.fsp-preset-chips { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.fsp-preset { display: inline-flex; align-items: center; gap: 0.3rem; padding: 0.32rem 0.6rem; border: 1px solid var(--fsp-border); border-radius: 999px; background: var(--fsp-bg2); color: var(--fsp-text2); font: inherit; font-size: 0.75rem; font-weight: 600; cursor: pointer; transition: all 0.15s; }
.fsp-preset:hover { border-color: var(--fsp-accent); color: var(--fsp-accent-strong); }
.fsp-preset.active { background: var(--fsp-btn); border-color: var(--fsp-btn); color: #ffffff; }
.fsp-preset svg { width: 13px; height: 13px; flex-shrink: 0; }
.fsp-preset-x { display: inline-grid; place-items: center; padding: 0; margin-left: 0.1rem; border: 0; background: none; color: inherit; opacity: 0.7; cursor: pointer; }
.fsp-preset-x:hover { opacity: 1; color: var(--fsp-err); }
.fsp-preset.active .fsp-preset-x:hover { color: #ffffff; }
.fsp-preset-x svg { width: 12px; height: 12px; }
.fsp-preset-save-row { display: flex; gap: 0.4rem; margin-top: 0.6rem; flex-wrap: wrap; }
.fsp-preset-save-row .fsp-input { flex: 1 1 140px; }

.fsp-opt-block { padding: 1rem 1.1rem; }
.fsp-opt-block .fsp-caption { margin-bottom: 0.6rem; display: flex; }
.fsp-seg { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 0.5rem; }
.fsp-seg-btn { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 0.3rem; padding: 0.75rem 0.5rem; border: 1.5px solid var(--fsp-border); border-radius: var(--fsp-radius-sm); background: var(--fsp-bg2); color: var(--fsp-text2); font: inherit; font-size: 0.85rem; font-weight: 600; cursor: pointer; transition: all 0.15s; }
.fsp-seg-btn svg { width: 22px; height: 22px; color: var(--fsp-muted); }
.fsp-seg-btn:hover:not(:disabled) { border-color: var(--fsp-accent); }
.fsp-seg-btn.active { border-color: var(--fsp-accent); background: var(--fsp-accent-soft); color: var(--fsp-text); }
.fsp-seg-btn.active svg { color: var(--fsp-accent); }
.fsp-seg-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.fsp-hint { margin: 0.6rem 0 0; font-size: 0.78rem; line-height: 1.5; color: var(--fsp-muted); }

/* collapsed one-line rows (progressive disclosure) */
.fsp-adv { overflow: hidden; }
.fsp-row + .fsp-row { border-top: 1px solid var(--fsp-border); }
.fsp-row-head, .fsp-row-switch { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 0.7rem; padding: 0.65rem 0.9rem; min-height: 52px; background: none; border: 0; font: inherit; color: var(--fsp-text); text-align: left; cursor: pointer; transition: background-color 0.15s; }
.fsp-row-head:hover, .fsp-row-switch:hover { background: var(--fsp-bg2); }
.fsp-row-head:focus-visible { outline: 2px solid var(--fsp-accent); outline-offset: -2px; }
.fsp-row-left { display: flex; align-items: center; gap: 0.6rem; min-width: 0; }
.fsp-row-left > svg { width: 17px; height: 17px; color: var(--fsp-accent); flex-shrink: 0; }
.fsp-row-text { display: flex; flex-direction: column; min-width: 0; }
.fsp-row-title { font-size: 0.86rem; font-weight: 600; color: var(--fsp-text); }
.fsp-row-hint { font-size: 0.73rem; color: var(--fsp-muted); line-height: 1.35; overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.fsp-row-right { display: inline-flex; align-items: center; gap: 0.5rem; flex-shrink: 0; }
.fsp-value { font-size: 0.75rem; font-weight: 700; color: var(--fsp-accent-strong); background: var(--fsp-accent-soft); border-radius: 6px; padding: 0.15rem 0.5rem; max-width: 130px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.fsp-value-mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-weight: 600; }
.fsp-chevron { width: 16px; height: 16px; color: var(--fsp-muted); transition: transform 0.2s; flex-shrink: 0; }
.fsp-row.open .fsp-chevron { transform: rotate(180deg); }
.fsp-row.open .fsp-row-head, .fsp-row.open .fsp-row-body { background: var(--fsp-bg2); }
.fsp-row-body { padding: 0.2rem 0.9rem 0.9rem; display: flex; flex-direction: column; gap: 0.5rem; animation: fspReveal 0.18s ease; }
@keyframes fspReveal { from { opacity: 0; transform: translateY(-3px); } to { opacity: 1; transform: none; } }
.fsp-switch-state { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.03em; color: var(--fsp-muted); min-width: 26px; text-align: right; }
.fsp-switch-state.is-on { color: var(--fsp-accent-strong); }

.fsp-mini-seg { display: flex; flex-direction: column; gap: 0.35rem; }
.fsp-mini { padding: 0.55rem 0.7rem; border: 1.5px solid var(--fsp-border); border-radius: var(--fsp-radius-sm); background: var(--fsp-bg); color: var(--fsp-text2); font: inherit; font-size: 0.8rem; font-weight: 600; text-align: left; cursor: pointer; }
.fsp-mini:hover { border-color: var(--fsp-accent); }
.fsp-mini.active { border-color: var(--fsp-accent); background: var(--fsp-accent-soft); color: var(--fsp-text); }

.fsp-input, .fsp-select { width: 100%; min-width: 0; height: 38px; padding: 0 0.7rem; border: 1px solid var(--fsp-border); border-radius: var(--fsp-radius-sm); background: var(--fsp-bg); color: var(--fsp-text); font: inherit; font-size: 0.85rem; }
.fsp-input:focus, .fsp-select:focus { outline: none; border-color: var(--fsp-accent); }
.fsp-input::placeholder { color: var(--fsp-muted); }

/* switch - beats the global checkbox rules */
.tool-container input[type="checkbox"].fsp-switch,
input[type="checkbox"].fsp-switch {
    -webkit-appearance: none !important; appearance: none !important;
    position: relative !important; display: inline-block !important;
    width: 44px !important; min-width: 44px !important; max-width: 44px !important; height: 24px !important; min-height: 24px !important;
    margin: 0 !important; padding: 0 !important;
    border: 1px solid transparent !important; border-radius: 999px !important;
    background: var(--fsp-switch-off) !important; background-color: var(--fsp-switch-off) !important;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.1) !important; cursor: pointer !important; flex-shrink: 0 !important;
    transition: background-color 0.2s !important;
}
.tool-container input[type="checkbox"].fsp-switch::after,
input[type="checkbox"].fsp-switch::after { content: '' !important; font-size: 0 !important; position: absolute !important; top: 2px !important; left: 2px !important; right: auto !important; bottom: auto !important; width: 18px !important; height: 18px !important; border-radius: 50% !important; background: #ffffff !important; border: 0 !important; box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3) !important; transform: none !important; transition: transform 0.2s !important; }
.tool-container input[type="checkbox"].fsp-switch:checked,
input[type="checkbox"].fsp-switch:checked { background: var(--fsp-btn) !important; background-color: var(--fsp-btn) !important; }
.tool-container input[type="checkbox"].fsp-switch:checked::after,
input[type="checkbox"].fsp-switch:checked::after { transform: translateX(20px) !important; }
.tool-container input[type="checkbox"].fsp-switch:focus-visible,
input[type="checkbox"].fsp-switch:focus-visible { outline: 2px solid var(--fsp-accent) !important; outline-offset: 2px !important; }

.fsp-summary { padding: 0.7rem 0.9rem; display: flex; flex-direction: column; gap: 0.3rem; background: var(--fsp-bg2); }
.fsp-sum-line { display: flex; justify-content: space-between; gap: 0.5rem; font-size: 0.83rem; color: var(--fsp-text2); }
.fsp-sum-line strong { color: var(--fsp-text); font-variant-numeric: tabular-nums; }

/* buttons */
.fsp-btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem; padding: 0.6rem 1rem; border: 1px solid var(--fsp-border); border-radius: var(--fsp-radius-sm); background: var(--fsp-bg); color: var(--fsp-text); font: inherit; font-size: 0.88rem; font-weight: 600; cursor: pointer; transition: background-color 0.15s, border-color 0.15s, transform 0.1s; }
.fsp-btn:hover { border-color: var(--fsp-accent); }
.fsp-btn:active { transform: translateY(1px); }
.fsp-btn svg { width: 17px; height: 17px; }
.fsp-btn-primary { background: var(--fsp-btn); border-color: var(--fsp-btn); color: #ffffff; }
.fsp-btn-primary:hover { background: var(--fsp-btn-hover); border-color: var(--fsp-btn-hover); }
.fsp-btn-primary:disabled { opacity: 0.55; cursor: not-allowed; }
.fsp-btn-sm { padding: 0.4rem 0.75rem; font-size: 0.8rem; height: 38px; }
.fsp-btn-big { width: 100%; margin-top: 0.875rem; padding: 0.85rem 1rem; font-size: 1rem; }
.fsp-side-actions { display: flex; justify-content: space-between; gap: 0.5rem; margin-top: 0.5rem; }
/* ---------- done ---------- */
.fsp-done { padding: 1.5rem; }
.fsp-done-head { display: flex; gap: 0.9rem; align-items: center; }
.fsp-done-icon { width: 56px; height: 56px; border-radius: 50%; display: grid; place-items: center; background: var(--fsp-accent-soft); color: var(--fsp-accent); flex-shrink: 0; }
.fsp-done-icon svg { width: 28px; height: 28px; }
.fsp-done-title { margin: 0; font-size: 1.3rem; color: var(--fsp-text); }
.fsp-done-sub { margin: 0.2rem 0 0; color: var(--fsp-text2); font-size: 0.9rem; line-height: 1.5; }
.fsp-done-fail { margin-top: 1rem; padding: 0.8rem 0.9rem; border-radius: var(--fsp-radius-sm); background: var(--fsp-warn-bg); border: 1px solid var(--fsp-warn-line); font-size: 0.85rem; color: var(--fsp-text); }
.fsp-done-fail p { margin: 0 0 0.3rem; }
.fsp-done-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1.1rem; }
.fsp-next { margin-top: 1.2rem; padding-top: 1rem; border-top: 1px solid var(--fsp-border); display: flex; flex-direction: column; gap: 0.5rem; }
.fsp-next-links { display: flex; flex-wrap: wrap; gap: 0.45rem; }
.fsp-next-link { display: inline-flex; align-items: center; gap: 0.35rem; padding: 0.45rem 0.8rem; border-radius: 999px; border: 1px solid var(--fsp-border); background: var(--fsp-bg2); color: var(--fsp-text); font-size: 0.82rem; font-weight: 600; text-decoration: none; }
.fsp-next-link:hover { border-color: var(--fsp-accent); color: var(--fsp-accent-strong); }
.fsp-next-link svg { width: 15px; height: 15px; color: var(--fsp-accent); }

/* ---------- error ---------- */
.fsp-error { display: flex; gap: 0.7rem; align-items: flex-start; margin: 1.25rem 0 0; padding: 0.9rem 1rem; border-radius: var(--fsp-radius); border: 1px solid rgba(192, 57, 43, 0.35); background: var(--fsp-err-bg); color: var(--fsp-text); font-size: 0.9rem; line-height: 1.55; }
.fsp-error > svg { width: 20px; height: 20px; color: var(--fsp-err); flex-shrink: 0; margin-top: 0.1rem; }
.fsp-error-body { flex: 1; min-width: 0; }
.fsp-error-body a { color: inherit; font-weight: 700; }
.fsp-error-contact { margin: 0.4rem 0 0; font-size: 0.82rem; color: var(--fsp-text2); }
.fsp-x { display: grid; place-items: center; width: 28px; height: 28px; padding: 0; border: 0; border-radius: 6px; background: none; color: var(--fsp-muted); cursor: pointer; flex-shrink: 0; }
.fsp-x:hover { background: rgba(0, 0, 0, 0.06); color: var(--fsp-text); }
.fsp-x svg { width: 16px; height: 16px; }

/* ---------- overlays ---------- */
.fsp-overlay { position: fixed; inset: 0; z-index: 9000; background: rgba(0, 0, 0, 0.6); display: flex; align-items: center; justify-content: center; padding: 1rem; }
.fsp-prog-card { background: var(--fsp-bg); color: var(--fsp-text); border: 1px solid var(--fsp-border); border-radius: 16px; padding: 1.4rem 1.5rem 1.1rem; min-width: 340px; max-width: 460px; width: 100%; box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3); }
.fsp-stages { display: flex; align-items: center; justify-content: center; margin-bottom: 1.1rem; }
.fsp-stage { display: flex; flex-direction: column; align-items: center; gap: 0.3rem; }
.fsp-stage-dot { display: grid; place-items: center; padding: 6px; border-radius: 50%; background: var(--fsp-bg3); color: var(--fsp-muted); transition: background-color 0.25s, color 0.25s; }
.fsp-stage-dot svg { width: 20px; height: 20px; display: block; }
.fsp-stage-label { font-size: 0.7rem; font-weight: 600; color: var(--fsp-muted); }
.fsp-stage.active .fsp-stage-dot { background: var(--fsp-btn); color: #ffffff; }
.fsp-stage.active .fsp-stage-label { color: var(--fsp-text); }
.fsp-stage.done .fsp-stage-dot { background: var(--fsp-accent-soft); color: var(--fsp-accent); }
.fsp-stage-conn { width: 28px; height: 2px; background: var(--fsp-border); margin: 0 0.35rem 1.2rem; flex-shrink: 0; transition: background-color 0.25s; }
.fsp-stage-conn.done { background: var(--fsp-accent); }
.fsp-bar { height: 8px; border-radius: 999px; background: var(--fsp-bg3); overflow: hidden; }
.fsp-bar-fill { height: 100%; width: 0; background: var(--fsp-accent); border-radius: inherit; transition: width 0.3s ease; }
.fsp-prog-meta { display: flex; gap: 0.6rem; align-items: baseline; margin-top: 0.6rem; font-size: 0.85rem; color: var(--fsp-text2); min-height: 2.6em; }
.fsp-prog-meta strong { color: var(--fsp-text); font-variant-numeric: tabular-nums; }
.fsp-prog-meta span { overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; word-break: break-word; }
.fsp-cancel { margin: 0.4rem auto 0; display: flex; }
.fsp-toast { position: fixed; left: 50%; bottom: 24px; z-index: 9500; transform: translate(-50%, 20px); opacity: 0; max-width: calc(100vw - 32px); padding: 0.65rem 1.1rem; border-radius: 10px; background: #1f2937; color: #ffffff; font-size: 0.86rem; font-weight: 500; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25); transition: opacity 0.25s, transform 0.25s; pointer-events: none; }
.fsp-toast.show { opacity: 1; transform: translate(-50%, 0); }
[data-theme="dark"] .fsp-toast { background: #f1f5f9; color: #0f172a; }

/* ---------- info sections ---------- */
.fsp-info { display: flex; flex-direction: column; gap: 1.25rem; margin-top: 0.5rem; }
.fsp-info-card { background: var(--bg-elevated, var(--fsp-bg)); border: 1px solid var(--fsp-border); border-radius: var(--fsp-radius); padding: 1.4rem 1.5rem; color: var(--fsp-text2); }
.fsp-info-card h2 { display: flex; align-items: center; gap: 0.55rem; margin: 0 0 0.9rem; font-size: 1.25rem; color: var(--fsp-text); }
.fsp-info-card h2 svg { width: 22px; height: 22px; color: var(--fsp-accent); flex-shrink: 0; }
.fsp-info-card > p { margin: 0 0 0.75rem; line-height: 1.7; font-size: 0.95rem; }
.fsp-info-card > p:last-child { margin-bottom: 0; }
.fsp-info-card a { color: var(--fsp-accent-strong); font-weight: 600; text-decoration: none; }
.fsp-info-card a:hover { text-decoration: underline; }
.fsp-info-card .steps-list { margin-bottom: 0.75rem; }
.fsp-features { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.9rem; }
.fsp-feature { padding: 1rem; border-radius: var(--fsp-radius-sm); background: var(--fsp-bg2); border: 1px solid var(--fsp-border); min-width: 0; }
.fsp-feature svg { width: 22px; height: 22px; color: var(--fsp-accent); }
.fsp-feature h3 { margin: 0.45rem 0 0.3rem; font-size: 0.95rem; color: var(--fsp-text); }
.fsp-feature p { margin: 0; font-size: 0.85rem; line-height: 1.55; }
.fsp-table-wrap { overflow-x: auto; border: 1px solid var(--fsp-border); border-radius: var(--fsp-radius-sm); margin-top: 0.4rem; }
.fsp-table { width: 100%; border-collapse: collapse; font-size: 0.86rem; }
.fsp-table th, .fsp-table td { padding: 0.6rem 0.75rem; text-align: left; vertical-align: top; border-bottom: 1px solid var(--fsp-border); }
.fsp-table th { background: var(--fsp-bg3); color: var(--fsp-text); font-weight: 700; white-space: nowrap; }
.fsp-table td:first-child { font-weight: 700; color: var(--fsp-text); white-space: nowrap; }
.fsp-table td:nth-child(2) { font-size: 0.86rem; }
.fsp-table tr:last-child td { border-bottom: 0; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
    .fsp-work { grid-template-columns: minmax(0, 1fr); }
    .fsp-features { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 600px) {
    .fsp-drop { padding: 1.8rem 0.8rem; }
    .fsp-card { padding: 0.85rem; }
    .fsp-features { grid-template-columns: minmax(0, 1fr); }
    .fsp-info-card { padding: 1.1rem; }
    .fsp-row-head, .fsp-row-switch { padding: 0.6rem 0.75rem; }
    .fsp-value { max-width: 100px; }
    .fsp-prog-card { min-width: 0; padding: 1.1rem; }
    .fsp-table { min-width: 560px; }
    .fsp-done-actions .fsp-btn { flex: 1 1 100%; }
    .fsp .fsp-title svg { width: 28px; height: 28px; }
}
@media (prefers-reduced-motion: reduce) {
    .fsp *, .fsp *::after { transition: none !important; animation: none !important; }
}

/* ============================================================================
   Splitter / joiner specific
   ========================================================================== */
.fsp code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.fsp-sr { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.fsp-dot { display: inline-block; width: 3px; height: 3px; border-radius: 50%; background: currentColor; opacity: 0.6; vertical-align: middle; margin: 0 0.3rem; }

/* split / join tabs */
.fsp-tabs { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 0.5rem; max-width: 560px; margin: 1.25rem auto 0; padding: 0.35rem; border: 1px solid var(--fsp-border); border-radius: 14px; background: var(--fsp-bg2); }
.fsp-tab { display: flex; align-items: center; justify-content: center; gap: 0.6rem; padding: 0.6rem 0.8rem; border-radius: 10px; color: var(--fsp-text2); text-decoration: none; border: 1.5px solid transparent; transition: background-color 0.15s, border-color 0.15s, color 0.15s; min-width: 0; }
.fsp-tab svg { width: 22px; height: 22px; flex-shrink: 0; color: var(--fsp-muted); }
.fsp-tab-text { display: flex; flex-direction: column; min-width: 0; line-height: 1.25; }
.fsp-tab-text strong { font-size: 0.95rem; color: var(--fsp-text); }
.fsp-tab-text small { font-size: 0.74rem; color: var(--fsp-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.fsp-tab:hover { border-color: var(--fsp-accent-line); color: var(--fsp-text); }
.fsp-tab:hover svg { color: var(--fsp-accent); }
.fsp-tab.active { background: var(--fsp-bg); border-color: var(--fsp-accent); box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06); }
.fsp-tab.active svg { color: var(--fsp-accent); }
.fsp-tab.active .fsp-tab-text strong { color: var(--fsp-accent-strong); }
.fsp-tab:focus-visible { outline: 2px solid var(--fsp-accent); outline-offset: 2px; }

/* source file + sets */
.fsp-src, .fsp-set, .fsp-recent-item { display: flex; align-items: center; gap: 0.65rem; padding: 0.6rem 0.65rem; border: 1px solid var(--fsp-border); border-radius: var(--fsp-radius-sm); background: var(--fsp-bg2); min-width: 0; }
.fsp-src-icon { width: 38px; height: 38px; border-radius: 9px; display: grid; place-items: center; background: var(--fsp-accent-soft); color: var(--fsp-accent); flex-shrink: 0; }
.fsp-src-icon svg { width: 20px; height: 20px; }
.fsp-src-main { display: flex; flex-direction: column; min-width: 0; flex: 1; gap: 0.1rem; }
.fsp-src-name { font-weight: 600; font-size: 0.9rem; color: var(--fsp-text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.fsp-src-meta { font-size: 0.76rem; color: var(--fsp-muted); line-height: 1.5; }
.fsp-set-list, .fsp-recent-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.45rem; }
.fsp-set { cursor: pointer; transition: border-color 0.15s, background-color 0.15s; }
.fsp-set:hover { border-color: var(--fsp-accent-line); }
.fsp-set.active { border-color: var(--fsp-accent); background: var(--fsp-accent-soft); }
.fsp-set:focus-visible { outline: 2px solid var(--fsp-accent); outline-offset: 2px; }
.fsp-set.is-blocked .fsp-src-icon { background: var(--fsp-err-bg); color: var(--fsp-err); }
.fsp-set-note { display: flex; align-items: center; gap: 0.4rem; flex-wrap: wrap; font-size: 0.78rem; color: var(--fsp-text2); padding: 0.1rem 0.2rem; }
.fsp-set-note svg { width: 15px; height: 15px; color: var(--fsp-accent); flex-shrink: 0; }
.fsp-set-note.is-muted, .fsp-set-note.is-muted svg { color: var(--fsp-muted); }
.fsp-badge { flex-shrink: 0; font-size: 0.7rem; font-weight: 700; padding: 0.15rem 0.5rem; border-radius: 999px; white-space: nowrap; }
.fsp-badge.is-ok { background: var(--fsp-accent-soft); color: var(--fsp-accent-strong); }
.fsp-badge.is-warn { background: var(--fsp-warn-bg); color: var(--fsp-warn); }
.fsp-badge.is-err { background: var(--fsp-err-bg); color: var(--fsp-err); }

/* callouts: extra states */
.fsp-checks:empty { display: none; }
.fsp-checks .fsp-guard { margin: 0 0 0.75rem; }
.fsp-checks { margin-bottom: 0.25rem; }
.is-err.fsp-guard { background: var(--fsp-err-bg); border-color: rgba(192, 57, 43, 0.35); color: var(--fsp-text); }
.is-err.fsp-guard > svg { color: var(--fsp-err); }
.is-ok.fsp-guard { background: var(--fsp-accent-soft); border-color: var(--fsp-accent-line); color: var(--fsp-text); }
.is-ok.fsp-guard > svg { color: var(--fsp-accent); }
.fsp-guard code { white-space: normal; }
.fsp-link-btn { display: inline; padding: 0; margin: 0; border: 0; background: none; font: inherit; font-weight: 700; color: var(--fsp-accent-strong); text-decoration: underline; text-underline-offset: 2px; cursor: pointer; }

/* parts table */
.fsp-parts-card { padding: 0.75rem; }
.fsp-parts-wrap { margin-top: 0; max-height: 460px; overflow: auto; }
.fsp-ptable { width: 100%; border-collapse: collapse; font-size: 0.84rem; table-layout: fixed; }
.fsp-ptable th { position: sticky; top: 0; z-index: 1; background: var(--fsp-bg3); color: var(--fsp-text); font-weight: 700; text-align: left; padding: 0.5rem 0.6rem; font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.03em; border-bottom: 1px solid var(--fsp-border); }
.fsp-ptable th:nth-child(1) { width: 3.2rem; }
.fsp-ptable th:nth-child(3) { width: 6.2rem; }
.fsp-ptable th:nth-child(4) { width: 6.6rem; }
.fsp-ptable td { padding: 0.4rem 0.6rem; border-bottom: 1px solid var(--fsp-border); color: var(--fsp-text2); vertical-align: middle; }
.fsp-ptable tr:last-child td { border-bottom: 0; }
.fsp-ptable tbody tr:hover td { background: var(--fsp-bg2); }
.fsp-no { color: var(--fsp-muted); font-variant-numeric: tabular-nums; }
.fsp-pname { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.8rem; color: var(--fsp-text) !important; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.fsp-num { text-align: right !important; white-space: nowrap; font-variant-numeric: tabular-nums; }
.fsp-act { text-align: right; }
.fsp-dl { width: 30px; height: 30px; }
.fsp-empty-row { text-align: center; color: var(--fsp-muted); padding: 1.5rem !important; }
.fsp-ptable tr.is-missing td { background: var(--fsp-err-bg); }
.fsp-ptable tr.is-missing .fsp-pname { color: var(--fsp-err) !important; font-style: italic; }
.fsp-st { display: inline-flex; align-items: center; gap: 0.2rem; font-size: 0.72rem; font-weight: 700; white-space: nowrap; }
.fsp-st svg { width: 15px; height: 15px; }
.fsp-st.is-ok { color: var(--fsp-accent); }
.fsp-st.is-warn { color: var(--fsp-warn); }
.fsp-st.is-err { color: var(--fsp-err); }
.fsp-helpers { display: flex; flex-wrap: wrap; align-items: center; gap: 0.4rem; margin-top: 0.7rem; }
.fsp-helpers:empty { display: none; }
.fsp-helper { display: inline-flex; align-items: center; gap: 0.3rem; padding: 0.2rem 0.55rem; border-radius: 999px; border: 1px solid var(--fsp-border); background: var(--fsp-bg2); font-size: 0.75rem; font-weight: 600; color: var(--fsp-text2); font-family: ui-monospace, Menlo, Consolas, monospace; }
.fsp-helper svg { width: 13px; height: 13px; color: var(--fsp-accent); }

/* size / count inputs */
.fsp-size-in { display: flex; gap: 0.4rem; align-items: center; margin-top: 0.7rem; }
.fsp-size-in .fsp-input { flex: 1 1 auto; font-variant-numeric: tabular-nums; font-weight: 600; }
.fsp-size-in .fsp-select { flex: 0 0 5.2rem; width: 5.2rem; }
.fsp-size-in .fsp-icon-btn { width: 38px; height: 38px; }
#fspCount { text-align: center; }
.fsp-mini code { background: none; padding: 0; font-weight: 700; }
.fsp-row.is-disabled .fsp-row-switch { cursor: not-allowed; }
.fsp-row.is-disabled .fsp-row-title { color: var(--fsp-muted); }
.tool-container input[type="checkbox"].fsp-switch:disabled, input[type="checkbox"].fsp-switch:disabled { opacity: 0.5 !important; cursor: not-allowed !important; }

/* done */
.fsp-done-icon.is-warn { background: var(--fsp-warn-bg); color: var(--fsp-warn); }
.fsp-done-note { display: flex; gap: 0.6rem; align-items: flex-start; margin-top: 1rem; padding: 0.8rem 0.9rem; border-radius: var(--fsp-radius-sm); background: var(--fsp-accent-soft); border: 1px solid var(--fsp-accent-line); font-size: 0.85rem; line-height: 1.55; color: var(--fsp-text); }
.fsp-done-note > svg { width: 18px; height: 18px; color: var(--fsp-accent); flex-shrink: 0; margin-top: 0.15rem; }
.fsp-done-note.is-warn { background: var(--fsp-warn-bg); border-color: var(--fsp-warn-line); }
.fsp-done-note.is-warn > svg { color: var(--fsp-warn); }
.fsp-done-note > div { min-width: 0; }
.fsp-hash { display: inline-block; max-width: 100%; font-size: 0.78em !important; word-break: break-all; white-space: normal !important; }
.fsp-done-files { margin-top: 1.1rem; display: flex; flex-direction: column; gap: 0.5rem; }
.fsp-dl-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 0.4rem; max-height: 300px; overflow-y: auto; }
.fsp-dl-btn { display: flex; align-items: center; gap: 0.45rem; min-width: 0; padding: 0.5rem 0.65rem; border: 1px solid var(--fsp-border); border-radius: var(--fsp-radius-sm); background: var(--fsp-bg2); color: var(--fsp-text); font: inherit; font-size: 0.8rem; cursor: pointer; text-align: left; transition: border-color 0.15s; }
.fsp-dl-btn:hover { border-color: var(--fsp-accent); }
.fsp-dl-btn svg { width: 15px; height: 15px; color: var(--fsp-accent); flex-shrink: 0; }
.fsp-dl-btn.is-got svg { color: var(--fsp-muted); }
.fsp-dl-name { flex: 1; min-width: 0; font-family: ui-monospace, Menlo, Consolas, monospace; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.fsp-dl-size { font-size: 0.72rem; color: var(--fsp-muted); white-space: nowrap; }
.fsp-dl-btn.is-helper { border-style: dashed; }
#fspDoneActions:empty { display: none; }
#fspDoneActions + .fsp-done-actions { margin-top: 0.6rem; }

/* recents (joiner) */
.fsp-recent { margin-top: 1.2rem; padding-top: 1rem; border-top: 1px solid var(--fsp-border); }
.fsp-recent .fsp-small { display: block; margin-top: 0.5rem; }
.fsp-recent-item { padding: 0.45rem 0.55rem; gap: 0.5rem; }
.fsp-recent-item .fsp-src-icon { width: 32px; height: 32px; }
.fsp-recent-item .fsp-src-icon svg { width: 17px; height: 17px; }

[data-theme="dark"] .fsp-tab.active { box-shadow: none; }
[data-theme="dark"] .is-err.fsp-guard { border-color: rgba(248, 113, 113, 0.35); }

@media (max-width: 600px) {
    .fsp-tabs { margin-top: 1rem; }
    .fsp-tab { padding: 0.5rem; gap: 0.45rem; }
    .fsp-tab svg { width: 20px; height: 20px; }
    .fsp-tab-text small { display: none; }
    .fsp-ptable th:nth-child(1) { width: 2.4rem; }
    .fsp-ptable th:nth-child(3) { width: 5rem; }
    .fsp-ptable th:nth-child(4) { width: 3rem; }
    .fsp-ptable td, .fsp-ptable th { padding-left: 0.4rem; padding-right: 0.4rem; }
    .fsp-st { font-size: 0; gap: 0; }
    .fsp-dl-grid { grid-template-columns: minmax(0, 1fr); }
    .fsp-badge { font-size: 0.64rem; padding: 0.1rem 0.4rem; }
    .fsp-set .fsp-src-icon { display: none; }
}

/* the global CSS makes every <button> 100% wide under 768px - keep chip-like buttons natural */
.fsp .fsp-preset, .fsp .fsp-save-btn, .fsp .fsp-text-btn, .fsp .fsp-preset-x, .fsp .fsp-icon-btn, .fsp .fsp-link-btn, .fsp .fsp-x { width: auto !important; flex: 0 0 auto; }
.fsp .fsp-size-in .fsp-icon-btn { width: 38px !important; }