body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #000;
}
.nano-container {
    max-width: 900px;
    margin-top: 40px;
    padding: 24px 24px 32px;
    border: 1px solid #209ce9;
    border-radius: 8px;
    background: radial-gradient(circle at top left, rgba(32,156,233,0.18), transparent 55%), #000;
    box-shadow: 0 0 24px rgba(32,156,233,0.35);
    text-align: left;
    color: #cce7ff;
}
.nano-container h1 {
    margin-top: 0;
    margin-bottom: 0.4em;
    font-size: 2.4em;
    color: #209ce9;
}
.nano-header {
    text-align: center;
}
.nano-logo {
    display: block;
    margin: 0 auto 0.6em;
    max-width: 120px;
    height: auto;
}
.nano-subtitle {
    margin: 0 0 1.5em;
    font-size: 0.95em;
    color: #7fc5ff;
}
.nano-footer {
    text-align: center;
}
.nano-section {
    margin-top: 1.8em;
    padding-top: 1.4em;
    border-top: 1px dashed rgba(32,156,233,0.6);
}
.nano-section h2 {
    margin: 0 0 0.6em;
    font-size: 1.3em;
    color: #9ad3ff;
}
.nano-label {
    display: block;
    margin-bottom: 0.4em;
    font-size: 0.9em;
    color: #9ad3ff;
}
.nano-input,
.nano-textarea {
    width: 100%;
    box-sizing: border-box;
    padding: 8px 10px;
    margin-bottom: 0.8em;
    border-radius: 4px;
    border: 1px solid rgba(32,156,233,0.9);
    background: #000;
    color: #cce7ff;
    font-family: monospace;
    font-size: 0.9em;
    max-height: 160px;
    overflow-y: auto;
    resize: none;
}
.nano-input-file {
    width: 100%;
    box-sizing: border-box;
    margin-bottom: 0.8em;
    border-radius: 4px;
    border: 1px solid rgba(32,156,233,0.7);
    padding: 6px 8px;
    background: #02050b;
    color: #cce7ff;
}
.nano-button {
    display: inline-block;
    margin: 0.25em 0.4em 0.9em 0;
    padding: 8px 18px;
    border-radius: 4px;
    border: 1px solid #209ce9;
    background: #209ce9;
    color: #000;
    font-family: 'Fixedsys', monospace;
    font-size: 0.95em;
    cursor: pointer;
}
.nano-button.secondary {
    background: transparent;
    color: #9ad3ff;
}
.nano-button:hover {
    background: #38a8ff;
    border-color: #38a8ff;
}
.nano-button.flash {
    box-shadow: 0 0 16px rgba(255,255,255,0.7);
    animation: button-flash 0.35s ease-out;
}
.nano-button.secondary:hover {
    background: rgba(32,156,233,0.15);
}
.nano-details {
    margin-top: 0.3em;
}
.nano-details > summary {
    cursor: pointer;
    font-weight: bold;
    margin-bottom: 0.4em;
    color: #9ad3ff;
}
.preview-container {
    margin-top: 1em;
}
#binaryImage {
    max-width: 100%;
    display: none;
    border-radius: 4px;
    border: 1px solid rgba(32,156,233,0.7);
}
.error {
    color: #ff6b6b;
    margin-top: 0.6em;
    font-size: 0.85em;
}
.nano-program-controls {
    margin-bottom: 0.6em;
}
.nano-program-controls-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-auto-rows: auto;
    gap: 4px;
    max-width: 220px;
}
.nano-arrow {
    min-width: 0;
    text-align: center;
}
.nano-arrow-up {
    grid-column: 2;
    grid-row: 1;
}
.nano-arrow-left {
    grid-column: 1;
    grid-row: 2;
}
.nano-arrow-right {
    grid-column: 3;
    grid-row: 2;
}
.nano-arrow-down {
    grid-column: 2;
    grid-row: 3;
}
.nano-layout {
    display: flex;
    gap: 24px;
    align-items: flex-start;
}
.nano-main {
    flex: 1 1 0;
    min-width: 0;
    max-width: 460px;
}
.nano-side {
    flex: 1 1 0;
    min-width: 0;
    max-width: 460px;
}
.runner-container {
    margin-top: 0.8em;
    padding: 8px;
    border-radius: 4px;
    border: 1px dashed rgba(32,156,233,0.6);
    max-width: 260px;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    position: relative;
    background: rgba(2,5,11,0.8);
    margin-left: auto;
    margin-right: auto;
}
.runner {
    position: absolute;
    bottom: 8px;
    left: 50%;
    font-size: 1.4em;
    color: #00ff66;
}
.runner.step {
    animation: runner-step 0.25s linear 1;
}
.runner-object {
    position: absolute;
    width: 10px;
    height: 10px;
    border-radius: 2px;
    background: #ff4d4d;
}
.runner-container .runner-object:nth-of-type(1) {
    left: 10%;
    bottom: 8px;
}
.runner-container .runner-object:nth-of-type(2) {
    left: 35%;
    bottom: 8px;
}
.runner-container .runner-object:nth-of-type(3) {
    left: 65%;
    bottom: 8px;
}
.runner-container .runner-object:nth-of-type(4) {
    left: 90%;
    bottom: 8px;
}
@keyframes runner-step {
    0% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
    100% { transform: translateY(0); }
}
@keyframes button-flash {
    0% { box-shadow: 0 0 0 rgba(32,156,233,0.0); }
    50% { box-shadow: 0 0 18px rgba(255,255,255,0.9); }
    100% { box-shadow: 0 0 0 rgba(32,156,233,0.0); }
}
@media (max-width: 900px) {
    .nano-layout {
        flex-direction: column;
    }
}
@media (max-width: 600px) {
    .nano-container {
        margin-top: 20px;
        padding: 18px 14px 24px;
    }
    .nano-container h1 {
        font-size: 2em;
    }
}