/* =========================================================
   Machine Instruction Widget - Chapter 6.01
   ========================================================= */

.machine-instruction-widget {
    margin: 1.5rem 0;
    padding: 1.25rem;
    border-radius: 24px;
    background: linear-gradient(135deg, #f8fafc, #eef2ff);
    border: 1px solid #dbeafe;
    box-shadow: 0 18px 45px rgba(15, 23, 42, 0.08);
}

.mi-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    margin-bottom: 1.25rem;
}

.mi-instruction-btn,
.mi-controls button {
    appearance: none;
    border: 1px solid #cbd5e1;
    border-radius: 999px;
    background: white;
    color: #334155;
    padding: 0.55rem 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
}

.mi-instruction-btn:hover,
.mi-controls button:hover {
    transform: translateY(-1px);
    border-color: #0f172a;
}

.mi-instruction-btn.active {
    background: #0f172a;
    color: white;
    border-color: #0f172a;
    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.18);
}

.mi-layout {
    display: grid;
    grid-template-columns: 0.9fr 1.6fr;
    gap: 1rem;
    align-items: stretch;
}

.mi-cpu-card,
.mi-step-card,
.mi-status-card {
    background: white;
    border: 1px solid #e2e8f0;
    border-radius: 20px;
    padding: 1rem;
    box-shadow: 0 10px 28px rgba(15, 23, 42, 0.06);
}

.mi-cpu-card {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 190px;
}

.mi-label,
.mi-field-title {
    font-size: 0.78rem;
    font-weight: 800;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.mi-cpu-card strong {
    display: block;
    margin: 0.5rem 0;
    color: #0f172a;
    font-size: 1.2rem;
}

.mi-cpu-card p {
    margin: 0;
    color: #475569;
}

.mi-binary-panel {
    display: grid;
    grid-template-columns: 1fr 0.72fr 0.72fr 2.3fr;
    gap: 0.55rem;
    align-items: stretch;
}

.mi-field {
    position: relative;
    min-height: 150px;
    padding: 0.9rem;
    border-radius: 18px;
    background: white;
    border: 2px solid #e2e8f0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 0.45rem;
    overflow: hidden;
    transition: all 0.25s ease;
}

.mi-field::before {
    content: "";
    position: absolute;
    inset: 0;
    opacity: 0.08;
    pointer-events: none;
}

.mi-op-field::before { background: #2563eb; }
.mi-mode-field::before { background: #7c3aed; }
.mi-register-field::before { background: #0891b2; }
.mi-operand-field::before { background: #16a34a; }

.mi-field strong {
    position: relative;
    z-index: 1;
    font-size: clamp(1.05rem, 2vw, 1.55rem);
    letter-spacing: 0.08em;
    color: #0f172a;
    word-break: break-all;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.mi-field small {
    position: relative;
    z-index: 1;
    color: #64748b;
    font-weight: 700;
}

.mi-field.is-active {
    transform: translateY(-4px);
    border-color: #0f172a;
    box-shadow: 0 16px 34px rgba(15, 23, 42, 0.16);
}

.mi-field.is-muted {
    opacity: 0.45;
}

.mi-status-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.8rem;
    margin: 1rem 0;
}

.mi-status-card strong {
    display: block;
    color: #0f172a;
    margin-bottom: 0.25rem;
}

.mi-status-card span {
    color: #475569;
    font-size: 0.92rem;
}

.mi-status-card.is-active {
    border-color: #2563eb;
    background: #eff6ff;
}

.mi-step-counter {
    margin: 0 0 0.25rem;
    color: #64748b;
    font-size: 0.82rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.mi-step-card h3 {
    margin: 0.2rem 0 0.4rem;
    color: #0f172a;
}

.mi-step-card p {
    color: #475569;
}

.mi-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-top: 0.9rem;
}

.mi-controls button:disabled {
    opacity: 0.45;
    cursor: default;
    transform: none;
}

@media (max-width: 860px) {
    .mi-layout,
    .mi-status-grid {
        grid-template-columns: 1fr;
    }

    .mi-binary-panel {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 560px) {
    .mi-binary-panel {
        grid-template-columns: 1fr;
    }
}