/* ============================================================================
   MOS 6502 RETRO SYSTEM - MODERN CYBERPUNK STYLING
   ============================================================================ */

:root {
    --bg-dark: #0a0e14;
    --bg-panel: #131920;
    --bg-panel-header: #1b232c;
    --border-color: #273444;
    --border-focus: #00ff9d;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #536374;
    --accent-cyan: #00e5ff;
    --accent-green: #00ff9d;
    --accent-amber: #ffb86c;
    --accent-red: #ff5555;
    --accent-purple: #bd93f9;
    --font-mono: 'Fira Code', 'Cascadia Code', 'Source Code Pro', 'Consolas', monospace;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    overflow-x: hidden;
    min-height: 100vh;
}

/* App Header */
.app-header {
    background-color: var(--bg-panel);
    border-bottom: 1px solid var(--border-color);
    padding: 10px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.brand-section {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-badge {
    background: linear-gradient(135deg, #00ff9d, #00b4d8);
    color: #000;
    font-weight: 800;
    font-size: 12px;
    padding: 3px 8px;
    border-radius: 4px;
    font-family: var(--font-mono);
    letter-spacing: 1px;
}

.app-title {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.5px;
    background: linear-gradient(90deg, #fff, #99f6e4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.example-picker {
    display: flex;
    align-items: center;
    gap: 8px;
}

.example-picker label {
    color: var(--text-secondary);
    font-size: 13px;
}

select.select-retro {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
    outline: none;
    transition: border-color 0.2s;
}

select.select-retro:hover, select.select-retro:focus {
    border-color: var(--accent-cyan);
}

.toggles {
    display: flex;
    gap: 14px;
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}

.toggle-label input {
    accent-color: var(--accent-green);
    cursor: pointer;
}

/* Main Grid Layout */
.main-container {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 16px;
    padding: 16px 20px;
    max-width: 1700px;
    margin: 0 auto;
}

@media (max-width: 1024px) {
    .main-container {
        grid-template-columns: 1fr;
    }
}

/* Panel Styles */
.panel {
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    margin-bottom: 16px;
}

.panel-header {
    background-color: var(--bg-panel-header);
    border-bottom: 1px solid var(--border-color);
    padding: 10px 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-title {
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Editor Section */
.editor-panel {
    height: 600px;
}

.editor-toolbar {
    display: flex;
    gap: 8px;
}

.btn-retro {
    background: #1e293b;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 6px 14px;
    border-radius: 5px;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
}

.btn-retro:hover {
    background: #334155;
    border-color: #64748b;
}

.btn-primary {
    background: #0f766e;
    color: #e6fffa;
    border-color: #14b8a6;
}

.btn-primary:hover {
    background: #0d9488;
    box-shadow: 0 0 10px rgba(20, 184, 166, 0.4);
}

.btn-run {
    background: #15803d;
    color: #f0fdf4;
    border-color: #22c55e;
}

.btn-run:hover, .btn-run.btn-active {
    background: #16a34a;
    box-shadow: 0 0 10px rgba(34, 197, 94, 0.5);
}

.btn-active {
    background: #ca8a04 !important;
    border-color: #eab308 !important;
    color: #000 !important;
}

.btn-danger {
    background: #7f1d1d;
    border-color: #ef4444;
}

.btn-danger:hover {
    background: #991b1b;
}

.editor-workspace {
    display: flex;
    flex: 1;
    position: relative;
    overflow: hidden;
    background: #090d13;
}

.line-numbers {
    width: 44px;
    padding: 12px 6px 12px 0;
    text-align: right;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 20px;
    color: var(--text-muted);
    background-color: #0d1117;
    border-right: 1px solid var(--border-color);
    user-select: none;
    overflow-y: hidden;
}

.code-editor {
    flex: 1;
    background: transparent;
    color: #e6edf3;
    border: none;
    outline: none;
    padding: 12px 14px;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 20px;
    resize: none;
    white-space: pre;
    overflow-wrap: normal;
    overflow-x: auto;
    tab-size: 2;
}

.editor-footer {
    background-color: var(--bg-panel-header);
    border-top: 1px solid var(--border-color);
    padding: 8px 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
}

.compile-status {
    font-family: var(--font-mono);
    font-size: 12px;
}

.status-success {
    color: var(--accent-green);
}

.status-error {
    color: var(--accent-red);
}

.demo-description {
    color: var(--text-muted);
    font-size: 12px;
}

/* Screen Section */
.screen-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px;
    background: #070a0e;
}

.screen-container {
    position: relative;
    border-radius: 8px;
    padding: 8px;
    background: #141b22;
    border: 2px solid #283341;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
    display: inline-block;
}

.screen-canvas {
    display: block;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    background: #000;
    border-radius: 4px;
    box-shadow: inset 0 0 10px rgba(0,0,0,0.8);
}

/* CRT Scanlines and curvature overlay */
.crt-overlay {
    display: none;
    position: absolute;
    top: 8px;
    left: 8px;
    right: 8px;
    bottom: 8px;
    border-radius: 4px;
    pointer-events: none;
    background: linear-gradient(
        rgba(18, 16, 16, 0) 50%, 
        rgba(0, 0, 0, 0.35) 50%
    ), linear-gradient(
        90deg,
        rgba(255, 0, 0, 0.04),
        rgba(0, 255, 0, 0.02),
        rgba(0, 0, 255, 0.04)
    );
    background-size: 100% 4px, 6px 100%;
    box-shadow: inset 0 0 25px rgba(0, 255, 157, 0.15);
}

.crt-active .crt-overlay {
    display: block;
}

.screen-hints {
    margin-top: 10px;
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
    font-family: var(--font-mono);
}

/* CPU State & Registers */
.cpu-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    background-color: var(--bg-panel-header);
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 10px;
}

.cpu-controls {
    display: flex;
    gap: 8px;
    align-items: center;
}

.speed-control {
    display: flex;
    align-items: center;
    gap: 10px;
}

.speed-control label {
    font-size: 12px;
    color: var(--text-secondary);
}

.speed-control input[type="range"] {
    width: 90px;
    accent-color: var(--accent-cyan);
    cursor: pointer;
}

.speed-label {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--accent-cyan);
    min-width: 110px;
}

.status-pill {
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 700;
    font-family: var(--font-mono);
    letter-spacing: 0.5px;
}

.status-running {
    background-color: rgba(34, 197, 94, 0.2);
    color: #4ade80;
    border: 1px solid #22c55e;
}

.status-paused {
    background-color: rgba(234, 179, 8, 0.2);
    color: #facc15;
    border: 1px solid #eab308;
}

.status-halted {
    background-color: rgba(239, 68, 68, 0.2);
    color: #f87171;
    border: 1px solid #ef4444;
}

/* Registers Grid */
.registers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 10px;
    padding: 14px;
}

.reg-box {
    background-color: #0a0e14;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px 10px;
    display: flex;
    flex-direction: column;
}

.reg-label {
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
}

.reg-val {
    font-family: var(--font-mono);
    font-size: 15px;
    font-weight: 700;
    color: var(--accent-green);
    margin-top: 2px;
}

/* Status Flags Row */
.flags-row {
    padding: 10px 14px;
    background: #0e131a;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.flags-title {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 600;
}

.flags-list {
    display: flex;
    gap: 6px;
}

.flag-led {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 3px 7px;
    background: #141b22;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-muted);
    transition: all 0.15s ease;
}

.flag-led.active {
    background: #064e3b;
    border-color: #10b981;
    color: #34d399;
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.4);
    font-weight: 700;
}

/* Metrics Row */
.metrics-row {
    padding: 8px 14px;
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-secondary);
    background: #10161f;
}

.metric-item strong {
    font-family: var(--font-mono);
    color: var(--accent-cyan);
}

/* Disassembly and Memory Tabs/Panels */
.disasm-container {
    height: 180px;
    overflow-y: auto;
    font-family: var(--font-mono);
    font-size: 12px;
    background: #090d14;
    padding: 6px 0;
}

.disasm-row {
    display: flex;
    padding: 2px 12px;
    line-height: 20px;
}

.disasm-row:hover {
    background-color: #131c26;
}

.disasm-row.current-pc {
    background-color: #1e3a47;
    color: #38bdf8;
    font-weight: 700;
}

.disasm-marker {
    width: 18px;
    color: var(--accent-green);
}

.disasm-addr {
    width: 65px;
    color: var(--text-muted);
}

.disasm-bytes {
    width: 95px;
    color: #64748b;
}

.disasm-code {
    flex: 1;
    color: var(--text-primary);
}

/* Memory Inspector */
.mem-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 14px;
    background-color: var(--bg-panel-header);
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 8px;
}

.mem-jumper {
    display: flex;
    gap: 6px;
    align-items: center;
}

.mem-input {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--accent-green);
    font-family: var(--font-mono);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    width: 75px;
    outline: none;
}

.mem-input:focus {
    border-color: var(--accent-green);
}

.btn-mem-quick {
    background: #161f2c;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 3px 8px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 11px;
    cursor: pointer;
}

.btn-mem-quick:hover {
    background: #253346;
    color: var(--text-primary);
}

.memory-grid {
    height: 190px;
    overflow-y: auto;
    font-family: var(--font-mono);
    font-size: 12px;
    background: #090d14;
    padding: 6px 12px;
    line-height: 20px;
}

.mem-row {
    display: flex;
    gap: 12px;
    white-space: pre;
}

.mem-row:hover {
    background: #131c26;
}

.mem-addr {
    color: var(--text-muted);
    width: 55px;
}

.mem-hex {
    color: #94a3b8;
    flex: 1;
}

.mem-byte.mem-pc {
    color: #38bdf8;
    font-weight: 700;
    text-decoration: underline;
}

.mem-ascii {
    color: var(--accent-purple);
    width: 140px;
    letter-spacing: 1px;
}

/* Scrollbars */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: #090d13;
}
::-webkit-scrollbar-thumb {
    background: #273444;
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: #3b4c60;
}

/* ============================================================================
   COMMODORE 64 FULL EMULATOR STYLES
   ============================================================================ */

.mode-nav {
    display: flex;
    gap: 8px;
    background-color: #0b0f15;
    padding: 6px 20px;
    border-bottom: 1px solid var(--border-color);
}

.mode-tab {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s;
}

.mode-tab:hover {
    color: var(--text-primary);
    background: #141b24;
}

.mode-tab.active {
    background: #1b2636;
    color: var(--accent-cyan);
    border-color: #2e435e;
    box-shadow: 0 2px 8px rgba(0, 229, 255, 0.15);
}

.c64-badge {
    background: linear-gradient(90deg, #e53935 20%, #fb8c00 20% 40%, #fdd835 40% 60%, #43a047 60% 80%, #1e88e5 80%);
    color: #fff;
    font-weight: 900;
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 11px;
    text-shadow: 0 1px 2px rgba(0,0,0,0.8);
}

/* C64 View Container */
.c64-view {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    gap: 16px;
    max-width: 1400px;
    margin: 0 auto;
}

.c64-case {
    background: #c8b89a; /* Iconic C64 Breadbin Beige */
    border: 8px solid #a8987b;
    border-radius: 14px;
    padding: 16px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.8), inset 0 2px 6px rgba(255,255,255,0.4);
    display: inline-block;
    position: relative;
}

.c64-screen-wrapper {
    position: relative;
    border: 4px solid #332d25;
    border-radius: 8px;
    overflow: hidden;
    background: #000;
    display: flex;
    box-shadow: inset 0 0 20px rgba(0,0,0,0.9);
}

.c64-canvas {
    display: block;
    width: 768px;
    height: 544px;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    background: #0000aa;
}

@media (max-width: 840px) {
    .c64-canvas {
        width: 100%;
        height: auto;
        max-width: 384px;
    }
}

.c64-case-badge {
    position: absolute;
    bottom: 6px;
    right: 24px;
    font-family: 'Helvetica Neue', Arial, sans-serif;
    font-weight: 800;
    font-size: 12px;
    letter-spacing: 1px;
    color: #645543;
    display: flex;
    align-items: center;
    gap: 6px;
    user-select: none;
}

/* C64 Control Bar */
.c64-controls-panel {
    width: 100%;
    max-width: 900px;
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 14px 18px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.c64-btn-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.c64-quick-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.btn-c64-cmd {
    background: #182230;
    color: #94a3b8;
    border: 1px solid #2b3b50;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 11px;
    padding: 5px 10px;
    cursor: pointer;
    transition: all 0.15s;
}

.btn-c64-cmd:hover {
    background: #23344a;
    color: #38bdf8;
    border-color: #38bdf8;
}

.c64-drop-zone {
    border: 2px dashed #334155;
    background: rgba(15, 23, 42, 0.4);
    border-radius: 6px;
    padding: 12px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.c64-drop-zone:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    background: rgba(0, 229, 255, 0.05);
}

.c64-drop-zone input[type="file"] {
    display: none;
}