/* variables */

:root {
	--bg: #0C1E35;
	--panel: #1A2942;
	--border: #2a3f5f;
	--accent: #60A5FA;
	--accent-dark: #2a5fb4;
	--error: #F87171;
	--text: #E0F2FE;
	--muted: #7DD3FC;
	--purple: #a78bfa;
	--yellow: #FBBF24;
	--orange: #fb923c;
	--section: #00ff15;
}

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

/* base */

body {
	background: var(--bg);
	color: var(--text);
	font-family: monospace;
	overflow: hidden;
}

.app {
	display: grid;
	grid-template-columns: 1fr 4px 1fr;
	height: 100vh;
}

.editor-panel,
.state-panel {
	height: 100%;
	background: var(--panel);
	padding: 16px;
	border: 1px solid var(--border);
}

.state-panel {
	display: flex;
	flex-direction: column;
	overflow: hidden;
}

/* resizers */

.resizer {
	position: relative;
	min-height: 3px;
	min-width: 4px;
	background: var(--border);
	user-select: none;
}

.resizer:hover {
	background: var(--accent);
}

.resizer-horizontal {
	cursor: col-resize;
}

.resizer-horizontal::after {
	content: "";
	position: absolute;
	top: 0;
	bottom: 0;
	left: -4px;
	right: -4px;
	user-select: none;
}

.resizer-vertical {
	cursor: row-resize;
	flex-shrink: 0;
}

.resizer-vertical::after {
	content: "";
	position: absolute;
	left: 0;
	right: 0;
	top: -4px;
	bottom: -4px;
}

/* toolbar */

.toolbar {
	display: flex;
	gap: 8px;
	margin-bottom: 16px;
}

.toolbar label {
	min-width: 40px;
	color: var(--muted);
}

#btn-help {
	margin-left: auto;
	text-decoration: none;
}

button,
#btn-help {
	background: var(--panel);
	color: var(--accent);
	border: 1px solid var(--accent);
	padding: 8px 16px;
	font-family: monospace;
	font-size: 16px;
	cursor: pointer;
}

button:hover,
#btn-help:hover {
	color: var(--accent-dark);
	border-color: var(--accent-dark);
}

.speed-control {
	display: flex;
	flex-direction: column;
}

#speed-display {
	min-width: 40px;
	color: var(--muted);
}


/* speed slider */

#speed-slider {
    margin-top: 8px;
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    outline: none;
}

#speed-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
}

#speed-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: none;
}

#speed-slider:hover {
    opacity: 1;
}

/* code editor */

.CodeMirror {
	height: calc(100vh - 116px) !important; /* !important needed because CodeMirror stylesheets are aggressive */
	background: var(--bg) !important;
	color: var(--text) !important;
	border: 1px solid var(--border);
	font-size: 16px;
	overflow: hidden;
}

.CodeMirror-gutters {
    background: var(--bg) !important;
    border-right: 1px solid var(--border) !important;
}

.CodeMirror-linenumber {
    color: var(--muted) !important;
    padding: 0 8px !important;
}

.CodeMirror-activeline-background {
    background: rgba(42, 63, 95, 0.3) !important;
}

.CodeMirror-activeline-gutter {
    background: var(--border) !important;
}

.CodeMirror-activeline .CodeMirror-linenumber {
    color: var(--accent) !important;
    font-weight: bold;
}

.CodeMirror-cursor {
	border-left: 1px solid var(--text) !important;
}

.current-line {
	background: rgba(0, 255, 159, 0.1) !important;
	border-left: 2px solid var(--accent) !important;
}

/* syntax highlighting */

.cm-s-custom .cm-keyword { color: var(--error); }
.cm-s-custom .cm-variable { color: var(--accent); }
.cm-s-custom .cm-number { color: var(--orange); }
.cm-s-custom .cm-comment { color: var(--muted); font-style: italic; }
.cm-s-custom .cm-hex { color: var(--purple); }
.cm-s-custom .cm-label { color: var(--text); }
.cm-s-custom .cm-section { color: var(--section); }

/* registers */

.registers-panel,
.log-panel {
	flex: 1;
	border: 1px solid var(--border);
	overflow: hidden;
	min-height: 0;
}

.registers-panel {
	display: flex;
	flex-direction: column;
	overflow-y: auto;
}

.registers-header {
	display: flex;
	align-items: center;
	gap: 8px;
}

.registers-grid {
	flex: 1;
	display: grid;
	grid-template-columns: 1fr 1fr;
	align-content: stretch;
}

.register,
.flag {
	padding: 8px;
	font-size: 19px;
	border-bottom: 1px solid var(--border);
}

.reg-value,
.flag-value {
	color: var(--accent);
	font-weight: bold;
}

.flags-grid {
	flex: 1;
	display: grid;
	grid-template-columns: 1fr 1fr;
}

/* log */

.log-panel {
	display: flex;
	flex-direction: column;
}

#log-output {
	width: 100%;
	flex: 1;
	min-height: 0;
	background: var(--bg);
	color: var(--accent);
	border: none;
	padding: 8px;
	font-family: monospace;
	font-size: 16px;
	resize: none;
	outline: none;
}

/* register popup */

#reg-popup {
	display: none;
}

.reg-popup-inner {
	position: fixed;
	top: 100px;
	left: 100px;
	background: var(--bg);
	border: 1px solid var(--border);
	border-radius: 6px;
	min-width: 240px;
	z-index: 100;
	overflow: hidden;
}

.reg-popup-titlebar {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 6px 10px;
	background: var(--panel);
	border-bottom: 1px solid var(--border);
	user-select: none;
	cursor: grab;
}

.reg-popup-body {
	padding: 10px;
}

.reg-popup-group {
	margin-bottom: 12px;
}

.reg-popup-row {
	display: flex;
	align-items: center;
	margin-bottom: 2px;
}

.reg-name {
	display: inline-block;
	width: 36px;
	color: var(--text);
}

.reg-val {
	display: inline-block;
	width: 80px;
	color: var(--accent);
}

/* mobile */

@media (max-width: 768px) {
    body {
        overflow: auto;
    }

    .app {
        display: flex;
        flex-direction: column;
        height: auto;
    }

	#log-output {
		min-height: 400px;
	}

    .resizer {
        display: none;
    }

    .editor-panel,
    .state-panel {
        width: 100%;
        height: auto;
    }

    .reg-popup-inner {
		display: none;
    }

	#btn-show-regs {
		display: none;
	}
}