/* ============================================================
   PsiMosaic — Simulator kvantnih kola
   Drag & drop editor + rezultati simulacije
   ============================================================ */

.sim-shell {
    --sim-cell: 60px;          /* širina/visina ćelije u mreži kola */
    --sim-gutter: 116px;       /* leva traka sa oznakama žica */
    --sim-bg: #0a0a1a;
    --sim-panel: #11122a;
    --sim-panel2: #181a38;
    --sim-line: rgba(120, 160, 220, 0.30);
    --sim-wire: rgba(150, 190, 240, 0.45);
    background: var(--sim-bg);
    color: var(--quantum-text);
    min-height: 100vh;
}

/* ── Raspored: paleta | radna površina ─────────────────────── */
.sim-layout {
    display: grid;
    /* minmax(0, …) dozvoljava koloni da se skupi ispod min-content sadržaja
       (kolo je široko) — inače bi se ceo grid razvukao preko širine ekrana. */
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 1.25rem;
    align-items: start;
}
/* Ćelije grida smeju da se skupe na širinu ekrana; horizontalni scroll kola
   preuzima unutrašnji .sim-canvas-wrap (overflow-x:auto). */
.sim-palette,
.sim-workspace { min-width: 0; }
@media (max-width: 900px) {
    .sim-layout { grid-template-columns: minmax(0, 1fr); }
    /* Na mobilnom je paleta iznad radne površine — sticky bi se preklapao
       sa kolom dok se skroluje, pa je vraćamo u normalan tok.
       Veća specifičnost (.sim-layout .sim-palette) je potrebna da nadjača
       bazno .sim-palette { position: sticky } koje je kasnije u fajlu. */
    .sim-layout .sim-palette {
        position: static;
        top: auto;
    }
}

/* ── Paleta (sidebar) ──────────────────────────────────────── */
.sim-palette {
    background: var(--sim-panel);
    border: 1px solid var(--sim-line);
    border-radius: 14px;
    padding: 1rem;
    position: sticky;
    top: 1rem;
}
.sim-palette h3 {
    font-size: .72rem;
    text-transform: uppercase;
    letter-spacing: .6px;
    color: var(--quantum-text-muted);
    margin: 1.1rem 0 .55rem;
    font-weight: 600;
}
.sim-palette h3:first-child { margin-top: 0; }

.sim-palette-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: .5rem;
}

/* Pojedinačna ikona gejta u paleti */
.sim-tool {
    user-select: none;
    cursor: grab;
    background: var(--sim-panel2);
    border: 1px solid var(--sim-line);
    border-radius: 10px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 1rem;
    color: var(--quantum-text);
    transition: transform .12s, border-color .12s, box-shadow .12s;
    position: relative;
}
.sim-tool:hover {
    transform: translateY(-2px);
    border-color: var(--quantum-accent);
    box-shadow: 0 4px 14px rgba(0, 0, 0, .35);
}
.sim-tool:active { cursor: grabbing; }
.sim-tool small {
    position: absolute;
    bottom: 2px;
    right: 5px;
    font-size: .54rem;
    color: var(--quantum-text-muted);
    font-family: 'Inter', sans-serif;
    font-weight: 500;
}
.sim-tool.wide { grid-column: span 3; height: 42px; font-size: .82rem; gap: .4rem; }
.sim-tool.span2 { grid-column: span 2; }

/* Boje po tipu gejta */
.sim-tool[data-gate="H"]  { color: #4fc3f7; }
.sim-tool[data-gate="X"], .sim-tool[data-gate="Y"], .sim-tool[data-gate="Z"] { color: #ff8a65; }
.sim-tool[data-gate="S"], .sim-tool[data-gate="T"] { color: #ba9bff; }
.sim-tool[data-gate^="R"] { color: #ffd166; }
.sim-tool[data-gate="CX"], .sim-tool[data-gate="CCX"], .sim-tool[data-gate="CP"] { color: #4ecdc4; }
.sim-tool[data-gate="MEASURE"] { color: #b0c4de; }
.sim-tool[data-gate="BARRIER"] { color: #ff6b9d; }

/* ── Glavna kartica radne površine ─────────────────────────── */
.sim-workspace {
    background: var(--sim-panel);
    border: 1px solid var(--sim-line);
    border-radius: 14px;
    padding: 1rem 1rem 1.25rem;
}

.sim-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: .55rem;
    align-items: center;
    margin-bottom: .9rem;
    padding-bottom: .9rem;
    border-bottom: 1px solid var(--sim-line);
}
.sim-toolbar .sim-spacer { flex: 1 1 auto; }
.sim-toolbar label {
    font-size: .82rem;
    color: var(--quantum-text-muted);
    margin: 0 .15rem 0 .35rem;
}
.sim-toolbar input[type="number"] {
    width: 72px;
    background: var(--sim-panel2);
    border: 1px solid var(--sim-line);
    color: var(--quantum-text);
    border-radius: 8px;
    padding: .28rem .5rem;
    font-family: var(--font-mono);
    font-size: .85rem;
}

/* ── Mreža kola ────────────────────────────────────────────── */
.sim-canvas-wrap {
    overflow-x: auto;
    padding: .5rem 0 .25rem;
}
.sim-canvas {
    position: relative;
    min-width: min-content;
}

/* Red (žica) */
.sim-row {
    display: flex;
    align-items: stretch;
    height: var(--sim-cell);
}
.sim-row-label {
    width: var(--sim-gutter);
    min-width: var(--sim-gutter);
    display: flex;
    align-items: center;
    gap: .35rem;
    padding-right: .35rem;
    font-family: var(--font-mono);
    font-size: .85rem;
    color: var(--quantum-text);
    /* Mora biti iznad .sim-cells (position:relative) da dugme za brisanje
       ne bude prekriveno prvom ćelijom i da hvata klik. */
    position: relative;
    z-index: 4;
}
.sim-row-label .sim-wire-name { font-weight: 600; }
.sim-row-label .sim-ket { color: var(--quantum-text-muted); font-size: .78rem; }
.sim-row-label.clbit { color: #b0c4de; }
.sim-row-del {
    margin-left: auto;
    flex: 0 0 auto;
    cursor: pointer;
    border: none;
    background: transparent;
    color: var(--quantum-text-muted);
    font-size: 1rem;
    line-height: 1;
    width: 26px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    position: relative;
    z-index: 5;
}
.sim-row-del:hover { color: #ff6b6b; background: rgba(255, 107, 107, .15); }

/* Niz ćelija u redu */
.sim-cells { display: flex; position: relative; }

.sim-cell {
    width: var(--sim-cell);
    min-width: var(--sim-cell);
    height: var(--sim-cell);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}
/* Horizontalna žica kroz centar ćelije */
.sim-cell.qubit::before,
.sim-cell.clbit::before {
    content: "";
    position: absolute;
    left: 0; right: 0;
    top: 50%;
    height: 2px;
    transform: translateY(-50%);
    background: var(--sim-wire);
    z-index: 0;
}
.sim-cell.clbit::before {
    height: 4px;
    background: linear-gradient(var(--sim-wire), var(--sim-wire)) center/100% 1px no-repeat,
                linear-gradient(var(--sim-wire), var(--sim-wire)) center/100% 1px no-repeat;
    box-shadow: 0 -1.5px 0 -0.5px var(--sim-wire), 0 1.5px 0 -0.5px var(--sim-wire);
    background: transparent;
    border-top: 1px solid var(--sim-wire);
    border-bottom: 1px solid var(--sim-wire);
    height: 4px;
}
.sim-cell.drop-hover { background: rgba(78, 205, 196, .12); outline: 1px dashed var(--quantum-accent); }

/* Postavljeni gejt u ćeliji */
.sim-gate {
    position: relative;
    z-index: 2;
    min-width: 38px;
    height: 38px;
    padding: 0 .35rem;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: .95rem;
    cursor: pointer;
    background: var(--sim-panel2);
    border: 1.5px solid var(--quantum-accent);
    color: var(--quantum-text);
    box-shadow: 0 2px 8px rgba(0, 0, 0, .4);
    transition: box-shadow .12s, transform .12s;
}
.sim-gate:hover { transform: translateY(-1px); }
.sim-gate.selected { box-shadow: 0 0 0 2px var(--quantum-accent2), 0 2px 10px rgba(0, 0, 0, .5); }

/* Premeštanje postavljenih elemenata (drag-and-drop) */
.sim-gate, .sim-node, .sim-measure, .sim-barrier-hit { cursor: grab; }
.sim-gate:active, .sim-node:active, .sim-measure:active, .sim-barrier-hit:active { cursor: grabbing; }
.sim-gate.dragging, .sim-node.dragging, .sim-measure.dragging, .sim-barrier-hit.dragging { opacity: .35; }

.sim-gate.g-H  { border-color: #4fc3f7; color: #4fc3f7; }
.sim-gate.g-X, .sim-gate.g-Y, .sim-gate.g-Z { border-color: #ff8a65; color: #ff8a65; }
.sim-gate.g-S, .sim-gate.g-T { border-color: #ba9bff; color: #ba9bff; }
.sim-gate.g-RX, .sim-gate.g-RY, .sim-gate.g-RZ, .sim-gate.g-CP { border-color: #ffd166; color: #ffd166; }
.sim-gate .sim-angle { font-size: .56rem; opacity: .85; margin-left: 1px; font-family: 'Inter', sans-serif; }

/* Kontrolna tačka, meta (⊕) i merenje */
.sim-node {
    position: relative;
    z-index: 2;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}
.sim-control-dot {
    width: 14px; height: 14px;
    border-radius: 50%;
    background: #4ecdc4;
    box-shadow: 0 0 0 2px rgba(78, 205, 196, .25);
}
.sim-target-x {
    width: 30px; height: 30px;
    border-radius: 50%;
    border: 2px solid #4ecdc4;
    position: relative;
}
.sim-target-x::before, .sim-target-x::after {
    content: ""; position: absolute; background: #4ecdc4;
}
.sim-target-x::before { left: 50%; top: 3px; bottom: 3px; width: 2px; transform: translateX(-50%); }
.sim-target-x::after  { top: 50%; left: 3px; right: 3px; height: 2px; transform: translateY(-50%); }
.sim-node.selected .sim-control-dot,
.sim-node.selected .sim-target-x { box-shadow: 0 0 0 3px var(--quantum-accent2); }

.sim-measure {
    width: 38px; height: 34px;
    border: 1.5px solid #b0c4de; border-radius: 8px;
    background: var(--sim-panel2);
    color: #b0c4de;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.05rem; cursor: pointer; z-index: 2; position: relative;
}

/* SVG sloj za veze kontrolisanih gejtova i preseke */
.sim-overlay {
    position: absolute;
    left: var(--sim-gutter);
    top: 0;
    pointer-events: none;
    z-index: 1;
}

/* ── Rezultati ─────────────────────────────────────────────── */
.sim-results { margin-top: 1.5rem; }
.sim-results h2 {
    font-size: 1.1rem; font-weight: 700; color: var(--quantum-text);
    margin-bottom: 1rem;
}
.sim-cut-block {
    background: var(--sim-panel);
    border: 1px solid var(--sim-line);
    border-radius: 14px;
    padding: 1rem 1.1rem;
    margin-bottom: 1.25rem;
}
.sim-cut-block .sim-cut-title {
    font-size: .82rem; text-transform: uppercase; letter-spacing: .5px;
    color: var(--quantum-accent); font-weight: 600; margin-bottom: .75rem;
}
.sim-bloch-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
    gap: .75rem;
}
.sim-bloch-card { text-align: center; }
.sim-bloch-card .sim-bloch-plot {
    width: 100%; height: 200px; border-radius: 10px; background: #0a0a1a;
}
.sim-bloch-card .sim-bloch-meta {
    font-family: var(--font-mono); font-size: .72rem;
    color: var(--quantum-text-muted); margin-top: .25rem;
}

/* Histogram */
.sim-histogram {
    background: var(--sim-panel);
    border: 1px solid var(--sim-line);
    border-radius: 14px;
    padding: 1.1rem 1.25rem 1.25rem;
}
.sim-hist-bars {
    display: flex;
    align-items: flex-end;
    gap: .6rem;
    height: 240px;
    padding-top: 2.4rem;   /* prostor iznad najvišeg stuba za brojeve */
    overflow-x: auto;
}
.sim-hist-col {
    display: flex; flex-direction: column; align-items: center;
    justify-content: flex-end; min-width: 46px; height: 100%;
}
.sim-hist-bar {
    width: 70%;
    min-height: 2px;
    background: linear-gradient(180deg, var(--quantum-accent), #2a8f88);
    border-radius: 5px 5px 0 0;
    transition: height .4s ease;
    position: relative;
}
.sim-hist-bar .sim-hist-val {
    position: absolute; top: -2.4rem; left: 50%; transform: translateX(-50%);
    font-size: .72rem; color: var(--quantum-text); font-family: var(--font-mono);
    font-weight: 600; line-height: 1.25; text-align: center; white-space: nowrap;
    text-shadow: 0 1px 3px rgba(0, 0, 0, .85);
}
.sim-hist-label {
    margin-top: .4rem; font-family: var(--font-mono); font-size: .74rem;
    color: var(--quantum-text); writing-mode: horizontal-tb;
}

.sim-empty-hint {
    color: var(--quantum-text-muted); font-size: .9rem;
    text-align: center; padding: 2rem 1rem;
}

/* Inspector za izabrani gejt */
.sim-inspector {
    background: var(--sim-panel2);
    border: 1px solid var(--sim-line);
    border-radius: 12px;
    padding: .8rem 1rem;
    margin-top: 1rem;
    display: none;
}
.sim-inspector.active { display: block; }
.sim-inspector .sim-insp-row {
    display: flex; flex-wrap: wrap; align-items: center; gap: .6rem; margin-bottom: .5rem;
}
.sim-inspector label { font-size: .8rem; color: var(--quantum-text-muted); }
.sim-inspector select, .sim-inspector input[type="number"] {
    background: var(--sim-panel); border: 1px solid var(--sim-line);
    color: var(--quantum-text); border-radius: 7px; padding: .25rem .45rem;
    font-family: var(--font-mono); font-size: .82rem;
}
.sim-inspector input[type="range"] { vertical-align: middle; }

.sim-error {
    background: rgba(255, 107, 107, .12);
    border: 1px solid rgba(255, 107, 107, .4);
    color: #ffb3b3; border-radius: 10px; padding: .7rem 1rem;
    margin-top: 1rem; font-size: .88rem;
}

/* ── Snimanje / učitavanje kola ────────────────────────────── */
.sim-saveload {
    margin-top: -.2rem;
    margin-bottom: .9rem;
    padding-bottom: .9rem;
    border-bottom: 1px solid var(--sim-line);
}
.sim-saveload-group {
    display: flex;
    align-items: center;
    gap: .5rem;
}
.sim-saveload input[type="text"] {
    background: var(--sim-panel2);
    border: 1px solid var(--sim-line);
    color: var(--quantum-text);
    border-radius: 8px;
    padding: .3rem .6rem;
    font-size: .85rem;
    min-width: 180px;
}
.sim-saveload select {
    background: var(--sim-panel2);
    border: 1px solid var(--sim-line);
    color: var(--quantum-text);
    border-radius: 8px;
    padding: .32rem .5rem;
    font-size: .85rem;
    min-width: 160px;
    max-width: 240px;
}
.sim-saveload a { color: var(--quantum-accent); }
.sim-toast {
    position: fixed;
    bottom: 1.25rem;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--sim-panel2);
    border: 1px solid var(--quantum-accent);
    color: var(--quantum-text);
    border-radius: 10px;
    padding: .6rem 1.1rem;
    font-size: .88rem;
    box-shadow: 0 6px 24px rgba(0, 0, 0, .5);
    opacity: 0;
    pointer-events: none;
    transition: opacity .25s, transform .25s;
    z-index: 1080;
}
.sim-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.sim-toast.error { border-color: #ff6b6b; color: #ffb3b3; }

/* ── Qiskit kod (dvosmerno povezan sa kolom) ───────────────── */
.sim-codeblock {
    background: var(--sim-panel);
    border: 1px solid var(--sim-line);
    border-radius: 14px;
    padding: 1rem 1.1rem 1.1rem;
    margin-top: 1.5rem;
}
.sim-code-head {
    display: flex;
    align-items: center;
    gap: .6rem;
    margin-bottom: .7rem;
}
.sim-code-head .sim-spacer { flex: 1 1 auto; }
.sim-code-title {
    font-size: .82rem; text-transform: uppercase; letter-spacing: .5px;
    color: var(--quantum-accent); font-weight: 600;
}
.sim-code-status { font-size: .8rem; font-family: var(--font-mono); }
.sim-code-status.ok { color: var(--quantum-green); }
.sim-code-status.err { color: #ff8a8a; }
.sim-code-area {
    width: 100%;
    min-height: 230px;
    resize: vertical;
    background: #0b0c1c;
    border: 1px solid var(--sim-line);
    border-radius: 10px;
    color: #e8f0f0;
    font-family: var(--font-mono);
    font-size: .86rem;
    line-height: 1.55;
    padding: .8rem 1rem;
    white-space: pre;
    overflow: auto;
    tab-size: 4;
}
.sim-code-area:focus {
    outline: none;
    border-color: var(--quantum-accent);
    box-shadow: 0 0 0 2px rgba(78, 205, 196, .18);
}
.sim-code-hint {
    margin-top: .55rem;
    font-size: .78rem;
    color: var(--quantum-text-muted);
}
.sim-code-hint code {
    background: var(--sim-panel2);
    padding: .05rem .35rem;
    border-radius: 5px;
    color: var(--quantum-accent2);
}