:root {
    --bg-primary: #060f11;
    --bg-secondary: #060f11;
    --bg-panel:  #060f11;
    --text-primary: #f0f0f0;
    --text-secondary: #888888;
    --accent-primary: #48D096;
    --accent-success: #48D096;
    --accent-warning: #FFB86C;
    --accent-error: #FF5555;
    --border: #2a2a2a;
}

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

body {
    font-family: 'JetBrains Mono', monospace;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

h1, h2, h3 {
    font-family: 'Sixtyfour', monospace;
    font-weight: 400;
}

header {
    background: var(--bg-secondary);
    padding: 16px 24px;
}

header h1 {
    font-size: 24px;
    color: var(--accent-primary);
}

.tagline {
    color: var(--text-secondary);
    font-size: 14px;
}

main {
    flex: 1;
    padding: 0 24px 24px 24px;
}

.split-panel {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    height: 100%;
}

.left-panel, .right-panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.panel {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 2px;
    padding: 16px;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 8px;
    margin-left: -16px;
    margin-right: -16px;
    padding-left: 16px;
    padding-right: 16px;
}

.panel-header h2 {
    font-size: 14px;
    color: var(--text-primary);
    margin: 0;
}

.panel h2 {
    font-size: 14px;
    margin-bottom: 16px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border);
    padding-bottom: 8px;
    margin-left: -16px;
    margin-right: -16px;
    padding-left: 16px;
    padding-right: 16px;
}

.header-controls {
    display: flex;
    gap: 6px;
    align-items: center;
}

.btn-header {
    padding: 4px 10px;
    font-size: 11px;
}

.speed-select-header {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 4px 8px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    cursor: pointer;
}

.editor-panel {
    flex: 1;
}

.cpu-state-panel {
    min-height: 300px;
}

.memory-panel {
    flex: 1;
}

footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 16px 32px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 12px;
}

footer a {
    color: var(--accent-primary);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

button {
    padding: 8px 16px;
    border-radius: 4px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    cursor: pointer;
    border: 1px solid;
    transition: all 0.2s;
    background: rgba(80, 250, 123, 0.1);
    color: var(--accent-primary);
    border-color: var(--border);
}

button:hover:not(:disabled) {
    opacity: 0.8;
}

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

button.secondary {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
}

button.danger {
    background: var(--accent-error);
}

/* Editor Component */
.example-selector {
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.example-selector label {
    color: var(--text-secondary);
}

.example-selector select {
    flex: 1;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 6px 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
}

.editor-wrapper {
    position: relative;
    height: 400px;
}

.cm-editor {
    height: 100%;
}

.cm-gutters {
    border-radius: 4px 0 0 4px;
}

.cm-editor .cm-content {
    padding: 12px;
}

/* Controls Component */
.controls-panel {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 16px;
}

.control-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.btn {
    padding: 8px 16px;
    border-radius: 4px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    cursor: pointer;
    border: 1px solid;
    transition: all 0.2s;
}

.btn-primary {
    background: rgba(80, 250, 123, 0.1);
    color: var(--accent-primary);
    border-color: var(--border);
}

.btn-success {
    background: rgba(80, 250, 123, 0.1);
    color: var(--accent-primary);
    border-color: var(--border);
}

.btn-info {
    background: rgba(139, 233, 253, 0.1);
    color: #8BE9FD;
    border-color: var(--border);
}

.btn-warning {
    background: rgba(255, 184, 108, 0.1);
    color: var(--accent-warning);
    border-color: var(--border);
}

.btn-secondary {
    background: rgba(136, 136, 136, 0.1);
    color: var(--text-secondary);
    border-color: var(--border);
}

.btn:hover:not(:disabled) {
    opacity: 0.8;
    transform: translateY(-1px);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.speed-control {
    align-items: center;
}

.speed-control label {
    color: var(--text-secondary);
}

.speed-control select {
    flex: 1;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 6px 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
}

/* Error Display Component */
.error-message {
    background: rgba(255, 85, 85, 0.1);
    border: 1px solid var(--accent-error);
    border-radius: 4px;
    padding: 12px;
    color: var(--accent-error);
    margin-top: 12px;
    font-size: 13px;
}

.error-message.hidden {
    display: none;
}

/* Registers Component */
.registers-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.register-row {
    display: flex;
    gap: 16px;
}

.register-item {
    flex: 1;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-secondary);
    padding: 8px 12px;
    border-radius: 4px;
    border: 1px solid var(--border);
}

.register-item.wide {
    flex: 2;
}

.register-label {
    color: var(--text-secondary);
    font-weight: 500;
}

.register-value {
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 15px;
}

/* Flags Component */
.flags-container h3 {
    font-size: 16px;
    margin-bottom: 12px;
    color: var(--text-secondary);
}

.flags-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 8px;
}

.flag-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--bg-secondary);
    padding: 8px;
    border-radius: 4px;
    border: 1px solid var(--border);
    transition: all 0.2s;
}

.flag-item.flag-set {
    background: rgba(80, 250, 123, 0.1);
    border-color: var(--accent-success);
}

.flag-label {
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 500;
}

.flag-value {
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 600;
}

.flag-item.flag-set .flag-value {
    color: var(--accent-success);
}

/* Memory Viewer Component */
.memory-controls {
    display: flex;
    gap: 8px;
    align-items: center;
    margin-bottom: 12px;
}

.memory-controls label {
    color: var(--text-secondary);
}

.memory-controls input {
    flex: 1;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 6px 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
}

.memory-scroll-container {
    height: 500px;
    overflow-y: auto;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 4px;
}

.memory-content {
    position: relative;
}

.memory-row {
    display: flex;
    gap: 12px;
    padding: 2px 8px;
    font-size: 12px;
    line-height: 20px;
    font-family: 'JetBrains Mono', monospace;
}

.memory-row:hover {
    background: rgba(74, 158, 255, 0.1);
}

.memory-addr {
    color: var(--text-secondary);
    min-width: 50px;
}

.memory-hex {
    flex: 1;
    color: var(--text-primary);
}

.memory-byte {
    display: inline-block;
    width: 20px;
}

.memory-ascii {
    color: #6272A4;
    font-size: 11px;
}

.memory-highlight {
    background: rgba(255, 184, 108, 0.3);
    animation: flash 1s ease-out;
}

@keyframes flash {
    0%, 100% { background: rgba(255, 184, 108, 0); }
    50% { background: rgba(255, 184, 108, 0.5); }
}

/* Terminal Panel */
.terminal-panel {
    margin-top: 16px;
}

.terminal-panel h2 {
    margin-bottom: 8px;
}

#terminal-container {
    width: 100%;
    height: 400px;
    background: #1a1a1a;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 8px;
    overflow: hidden;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .split-panel {
        grid-template-columns: 1fr;
    }

    .flags-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}