* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-color: #1a1a2e;
    --panel-bg: #16213e;
    --text-color: #e0e0e0;
    --accent-color: #0f3460;
    --highlight-color: #e94560;
    --success-color: #00d9a0;
    --warning-color: #ffc107;
    --border-color: #333;
    --font-mono: "Menlo", "Monaco", "Courier New", monospace;
}

body {
    font-family:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
}

#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1.5rem;
    background-color: var(--panel-bg);
    border-bottom: 1px solid var(--border-color);
}

header h1 {
    font-size: 1.25rem;
    font-weight: 600;
}

#controls {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

button,
select {
    padding: 0.4rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--accent-color);
    color: var(--text-color);
    cursor: pointer;
    font-size: 0.875rem;
    transition: background-color 0.2s;
}

button:hover {
    background-color: var(--highlight-color);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

main {
    display: flex;
    flex: 1;
    padding: 1rem;
    gap: 1rem;
}

#display-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

#screen {
    background-color: #000;
    border: 4px solid #333;
    border-radius: 8px;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    width: 840px;
    height: 576px;
}

#disk-indicators {
    display: flex;
    gap: 1rem;
}

.disk-slot {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background-color: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.disk-label {
    font-weight: 500;
}

.disk-led {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: #333;
    transition: background-color 0.1s;
}

.disk-led.active {
    background-color: var(--highlight-color);
    box-shadow: 0 0 8px var(--highlight-color);
}

.disk-insert,
.disk-eject {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}

/* Debugger Panel */
#debugger-panel {
    width: 400px;
    background-color: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

#debugger-panel.hidden {
    display: none;
}

#debugger-toolbar {
    display: flex;
    gap: 0.25rem;
    padding: 0.5rem;
    background-color: var(--accent-color);
    border-bottom: 1px solid var(--border-color);
}

#debugger-toolbar button {
    padding: 0.3rem 0.5rem;
    font-size: 0.75rem;
}

#debugger-content {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem;
}

#debugger-content section {
    margin-bottom: 1rem;
    padding: 0.5rem;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 4px;
}

#debugger-content h3 {
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
    color: var(--highlight-color);
}

.register-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.25rem;
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

.register-grid label {
    color: #888;
}

.register-grid span {
    color: var(--success-color);
}

#flags {
    display: flex;
    gap: 0.25rem;
    margin-top: 0.5rem;
    font-family: var(--font-mono);
}

#flags label {
    color: #888;
    margin-right: 0.5rem;
}

.flag {
    width: 1.5em;
    text-align: center;
    padding: 0.1rem;
    background-color: #333;
    border-radius: 2px;
    color: #666;
}

.flag.active {
    background-color: var(--success-color);
    color: #000;
}

#cycles {
    margin-top: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

#cycles label {
    color: #888;
}

#cycles span {
    color: var(--text-color);
}

#disasm-view {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    max-height: 200px;
    overflow-y: auto;
}

.disasm-line {
    padding: 0.1rem 0.25rem;
    display: flex;
    gap: 0.5rem;
}

.disasm-line:hover {
    background-color: rgba(255, 255, 255, 0.1);
    cursor: pointer;
}

.disasm-line.current {
    background-color: var(--accent-color);
}

.disasm-line.breakpoint {
    border-left: 3px solid var(--highlight-color);
}

.disasm-addr {
    color: #888;
}

.disasm-bytes {
    color: #666;
    width: 8ch;
}

.disasm-instruction {
    color: var(--success-color);
}

.disasm-operand {
    color: var(--text-color);
}

#breakpoint-list {
    max-height: 100px;
    overflow-y: auto;
    margin-bottom: 0.5rem;
}

.breakpoint-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.2rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

.breakpoint-item input[type="checkbox"] {
    cursor: pointer;
}

.breakpoint-item .bp-addr {
    color: var(--highlight-color);
}

.breakpoint-item button {
    padding: 0.1rem 0.3rem;
    font-size: 0.625rem;
}

#breakpoint-add {
    display: flex;
    gap: 0.25rem;
}

#breakpoint-add input {
    flex: 1;
    padding: 0.25rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: #222;
    color: var(--text-color);
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

#memory-controls {
    display: flex;
    gap: 0.25rem;
    margin-bottom: 0.5rem;
}

#memory-controls input {
    width: 6ch;
    padding: 0.25rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: #222;
    color: var(--text-color);
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

#memory-controls select {
    font-size: 0.75rem;
    padding: 0.25rem;
}

#memory-controls button {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}

#memory-dump {
    font-family: var(--font-mono);
    font-size: 0.625rem;
    line-height: 1.4;
    max-height: 200px;
    overflow-y: auto;
    white-space: pre;
    background-color: #111;
    padding: 0.5rem;
    border-radius: 4px;
}

.mem-addr {
    color: #888;
}

.mem-byte {
    color: var(--text-color);
}

.mem-byte.changed {
    color: var(--highlight-color);
}

.mem-ascii {
    color: #666;
}

#switch-display {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
}

.switch {
    padding: 0.2rem 0.4rem;
    font-family: var(--font-mono);
    font-size: 0.625rem;
    background-color: #333;
    border-radius: 2px;
    color: #666;
}

.switch.active {
    background-color: var(--success-color);
    color: #000;
}

.drive-status {
    display: flex;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.25rem;
}

.drive-label {
    font-weight: bold;
    color: var(--highlight-color);
}

/* Loading overlay */
#loading {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    z-index: 1000;
}

#loading.hidden {
    display: none;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--highlight-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Fullscreen styles */
:fullscreen #display-container {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    background-color: #000;
}

:fullscreen #screen {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
}

:fullscreen #disk-indicators {
    display: none;
}

/* Responsive adjustments */
@media (max-width: 900px) {
    main {
        flex-direction: column;
    }

    #debugger-panel {
        width: 100%;
        max-height: 50vh;
    }
}