:root {
  --bg: #16161e;
  --bg2: #1e1e2e;
  --bg3: #262637;
  --c64blue: #40318d;
  --c64ltblue: #7b71a8;
  --accent: #7e83d1;
  --text: #b0b8cd;
  --dim: #6c7086;
  --green: #6dbf67;
  --green-dim: #4a8a46;
  --red: #d94452;
  --yellow: #d4a843;
  --orange: #fab387;
  --purple: #cba6f7;
  --blue: #7096c8;
  --teal: #6fb8ad;
  --subtext: #a6adc8;
  --c64-black: #000000; --c64-white: #ffffff; --c64-red: #9f4e44; --c64-cyan: #6abfc6;
  --c64-purple: #a057a3; --c64-green: #5cab5e; --c64-dkblue: #50459b; --c64-yellow: #c9d487;
  --c64-orange: #a1683c; --c64-brown: #6d5412; --c64-ltred: #cb7e75; --c64-dkgrey: #626262;
  --c64-grey: #898989; --c64-ltgreen: #9ae29b; --c64-ltblue2: #887ecb; --c64-ltgrey: #adadad;
}
* { margin:0; padding:0; box-sizing:border-box; }
body { background:var(--bg); color:var(--text); font-family:'Cascadia Code','Fira Code','Consolas',monospace;
       font-size:13px; height:100vh; display:flex; flex-direction:column; overflow:hidden; }
header { background:var(--c64blue); padding:0 24px; display:flex; align-items:center; gap:16px;
         border-bottom:3px solid var(--accent); height:52px; flex-shrink:0;
         transition:height 1.5s ease-in-out, background-color 1.5s ease-in-out; }
header .logo { font-size:16px; font-weight:700; letter-spacing:1px; color:#fff;
               display:flex; align-items:center; gap:10px; text-decoration:none; flex-shrink:0; }
header .logo img { width:24px; height:24px; }
header .ver { color:var(--c64ltblue); font-size:12px; }
header nav { display:flex; gap:20px; margin-left:auto; }
header nav a { color:var(--subtext); font-size:12px; text-transform:uppercase;
               letter-spacing:1px; text-decoration:none; padding:4px 0; transition:color .2s; }
header nav a:hover { color:#fff; }
main { display:flex; flex:1; overflow:hidden; }

/* Sidebar */
aside { width:300px; min-width:300px; background:var(--bg2); border-right:1px solid var(--bg3);
        padding:16px; display:flex; flex-direction:column; gap:12px; overflow-y:auto; }

#drop-zone { border:2px dashed var(--dim); border-radius:8px; text-align:center;
             color:var(--dim); cursor:pointer; transition:all .2s; position:relative;
             font-size:14px; flex-shrink:0; margin:auto;
             width:min(60vh, 60vw, 400px); aspect-ratio:1;
             display:flex; flex-direction:column; align-items:center; justify-content:center; }
#drop-zone.hover, #drop-zone:hover { border-color:var(--accent); color:var(--accent); background:rgba(108,113,196,.08); }
#drop-zone.has-file { width:min(60vh, 60vw, 400px); aspect-ratio:1; padding:24px 32px;
                      border-color:var(--green); color:var(--green); border-style:solid; }
#drop-zone input { position:absolute; inset:0; opacity:0; cursor:pointer; }
#drop-zone .file-loaded { font-size:11px; text-transform:uppercase; letter-spacing:2px; margin-bottom:8px; opacity:0.7; }
#drop-zone .filename { font-weight:700; word-break:break-all; font-size:16px; }
#drop-zone .filesize { font-size:12px; margin-top:4px; opacity:0.7; }

.opt-group { background:var(--bg3); border-radius:6px; padding:12px; }
.opt-group h3 { font-size:12px; text-transform:uppercase; letter-spacing:1px; color:var(--dim); margin-bottom:8px; }
.opt-group label { display:flex; align-items:center; gap:8px; padding:3px 0; cursor:pointer; font-size:12px; }
.opt-group input[type=text] { background:var(--bg); border:1px solid var(--bg3); color:var(--text); padding:4px 8px;
                               border-radius:4px; font-family:inherit; font-size:12px; width:120px; }
.opt-group input[type=text]:focus { border-color:var(--accent); outline:none; }
input[type=checkbox] { accent-color:#3a3a5c; color-scheme:dark; }
input[type=checkbox]:checked { accent-color:var(--accent); }
input[type=checkbox]:focus { accent-color:var(--accent); }
#opt-verbosity { -webkit-appearance:none; appearance:none; width:80px; height:4px;
                 background:var(--dim); border-radius:2px; outline:none; border:none;
                 vertical-align:middle; margin-left:4px; cursor:pointer; }
label:has(#opt-verbosity) { padding:6px 0 9px; }
#opt-verbosity::-webkit-slider-thumb { -webkit-appearance:none; width:12px; height:12px;
                 border-radius:50%; background:var(--accent); border:none; cursor:pointer; margin-top:-4px; }
#opt-verbosity::-moz-range-thumb { width:12px; height:12px;
                 border-radius:50%; background:var(--accent); border:none; cursor:pointer; }
#opt-verbosity::-webkit-slider-runnable-track { background:var(--dim); height:4px; border-radius:2px; }
#opt-verbosity::-moz-range-track { background:var(--dim); height:4px; border-radius:2px; border:none; }
#opt-verbosity-label { font-weight:600; font-size:12px; min-width:50px; display:inline-block; }

#btn-disasm { background:var(--c64blue); color:#fff; border:none; padding:10px; border-radius:6px;
              font-family:inherit; font-size:13px; font-weight:700; cursor:pointer; transition:all .2s;
              letter-spacing:.5px; }
#btn-disasm:hover:not(:disabled) { background:var(--accent); }
#btn-disasm:disabled { opacity:.4; cursor:not-allowed; }
#btn-disasm.loading:disabled { opacity:1; }

#btn-open-presets { background:var(--bg3); color:var(--c64ltblue); border:1px solid var(--dim); padding:8px 12px;
                    border-radius:6px; font-family:inherit; font-size:12px; cursor:pointer; transition:all .2s; }
#btn-open-presets:hover { border-color:var(--accent); color:var(--accent); background:rgba(108,113,196,.1); }

/* Preset modal */
.modal-overlay { position:fixed; inset:0; background:rgba(0,0,0,.6); z-index:100;
                 display:flex; align-items:center; justify-content:center; }
.modal-overlay[hidden] { display:none; }
.modal-box { background:var(--bg2); border:1px solid var(--bg3); border-radius:10px;
             padding:20px; width:720px; max-width:92vw; max-height:85vh; box-shadow:0 8px 32px rgba(0,0,0,.5);
             display:flex; flex-direction:column; aspect-ratio:1.1; }
.modal-header { display:flex; justify-content:space-between; align-items:center; margin-bottom:16px;
                font-size:13px; font-weight:700; color:var(--dim); text-transform:uppercase; letter-spacing:1px; }
.modal-close { background:none; border:none; color:var(--dim); font-size:16px; cursor:pointer;
               padding:2px 6px; border-radius:4px; transition:color .15s; }
.modal-close:hover { color:var(--text); }
.modal-grid { display:grid; grid-template-rows:repeat(12, auto); grid-auto-flow:column;
              grid-auto-columns:1fr; gap:6px; overflow-y:auto; flex:1; align-content:start; }
.preset-btn { background:var(--bg); color:var(--text); border:1px solid var(--bg3); padding:8px 10px;
              border-radius:4px; font-family:inherit; font-size:11px; cursor:pointer; transition:all .2s;
              text-align:left; display:flex; justify-content:space-between; align-items:center; }
.preset-btn span { color:var(--dim); font-size:10px; }
.preset-btn:hover { border-color:var(--accent); color:var(--accent); background:rgba(108,113,196,.1); }
.preset-btn:hover span { color:var(--accent); }
#btn-disasm.loading { background:var(--accent); }

/* Stats */
#stats-panel { background:var(--bg3); border-radius:6px; padding:12px; }
.stat-row { display:flex; justify-content:space-between; padding:2px 0; font-size:12px; gap:8px; }
.stat-label { color:var(--dim); white-space:nowrap; flex-shrink:0; }
.stat-value { color:var(--text); font-weight:600; text-align:right; word-break:break-word; }
.stat-value.highlight { color:var(--green); }
.stat-value.warn { color:var(--yellow); }
.stat-value.unknown { color:var(--dim); font-style:italic; }

/* Output area */
#output-area { flex:1; display:flex; flex-direction:column; overflow:hidden; }

#tabs { display:flex; background:var(--bg2); border-bottom:1px solid var(--bg3); }
.tab { background:none; border:none; color:var(--dim); padding:10px 20px; font-family:inherit;
       font-size:12px; cursor:pointer; border-bottom:2px solid transparent; transition:all .2s; }
.tab:hover { color:var(--text); }
.tab.active { color:var(--accent); border-bottom-color:var(--accent); }

.tab-content { display:none; flex:1; overflow:hidden; }
.tab-content.active { display:flex; flex-direction:column; }

#asm-toolbar { display:flex; align-items:center; gap:12px; padding:8px 16px; background:var(--bg2);
               border-bottom:1px solid var(--bg3); }
#btn-download { background:var(--accent); color:#fff; border:none; padding:6px 14px; border-radius:4px;
                font-family:inherit; font-size:12px; cursor:pointer; }
#btn-download:disabled { opacity:.4; cursor:not-allowed; }
#btn-copy { background:transparent; color:var(--dim); border:1px solid var(--bg3); padding:4px 7px;
            border-radius:4px; cursor:pointer; line-height:0; transition:color .15s, border-color .15s; }
#btn-copy:hover:not(:disabled) { color:var(--accent); border-color:var(--accent); }
#btn-copy:disabled { opacity:.3; cursor:not-allowed; }
#btn-copy.copied { color:var(--green); border-color:var(--green); }
#asm-info { color:var(--dim); font-size:11px; }

#log-output { flex:1; overflow:auto; padding:16px; white-space:pre; font-size:12px;
              line-height:1.6; background:var(--bg); color:var(--teal); user-select:text; cursor:text; min-height:0; }
#log-output:empty { display:none; }
.log-phase { color:var(--blue); font-weight:700; }
.log-sep { color:var(--dim); }
.log-info { color:var(--subtext); }
.log-ok { color:var(--green); }
.log-warn { color:var(--yellow); }
.log-err { color:var(--red); font-weight:700; }
.log-dim { color:var(--dim); }
.log-ready { color:var(--blue); font-weight:700; }
.log-cursor { color:var(--blue); animation:blink 1s step-end infinite; }
@keyframes blink { 50% { opacity:0; } }
.log-stat-label { color:var(--dim); }
.log-stat-value { color:var(--text); font-weight:600; }

#asm-empty { flex:1; display:flex; flex-direction:column;
             align-items:center; justify-content:center; color:var(--dim);
             font-size:14px; text-align:center; line-height:1.8; }
#asm-empty small { font-size:12px; opacity:0.6; }
#asm-empty.hidden { display:none; }
#asm-empty:not(.hidden) ~ #asm-editor { display:none; }
#asm-editor { flex:1; position:relative; overflow:hidden; background:var(--bg); }
#asm-gutter {
  position:absolute; top:0; left:0; bottom:0; width:50px;
  z-index:4; pointer-events:none;
  background:var(--bg2); border-right:1px solid var(--bg3);
  padding:16px 8px 16px 0; overflow:hidden;
  font-family:'Consolas','Courier New',monospace; font-size:12px; line-height:1.3;
  color:var(--dim); text-align:right; white-space:pre;
  user-select:none;
}
#asm-highlight {
  position:absolute; top:0; left:50px; right:0; bottom:0;
  margin:0; padding:16px; border:none; outline:none;
  font-family:'Consolas','Courier New',monospace; font-size:12px; line-height:1.3;
  white-space:pre; overflow:auto; tab-size:8;
  background:transparent; color:var(--text); user-select:text; cursor:text;
}
#asm-highlight::selection { background:rgba(108,113,196,.35); }
#asm-highlight *::selection { background:rgba(108,113,196,.35); }

/* Syntax highlighting */
.hl-comment { color:var(--green-dim); }
.hl-label { color:var(--yellow); font-weight:700; }
.hl-dir { color:var(--purple); }
.hl-num { color:var(--green); }
.hl-illegal { color:var(--red); font-weight:700; }
.hl-string { color:var(--orange); }
.hl-mnemonic { color:var(--blue); }
.hl-hwreg { color:var(--teal); }

/* Scrollbar */
::-webkit-scrollbar { width:8px; height:8px; }
::-webkit-scrollbar-track { background:var(--bg); }
::-webkit-scrollbar-thumb { background:var(--bg3); border-radius:4px; }
::-webkit-scrollbar-thumb:hover { background:var(--dim); }

/* Spinner */
@keyframes spin { to { transform:rotate(360deg); } }
#btn-disasm .spinner { display:inline-block; width:12px; height:12px;
           border:2px solid rgba(255,255,255,.85);
           border-top:2px solid transparent; border-right:2px solid transparent;
           border-radius:50%; animation:spin .5s linear infinite;
           margin-left:8px; vertical-align:-1px; }
.log-spinner { display:inline-block; width:10px; height:10px; border:2px solid var(--bg2);
              border-top-color:var(--text); border-right-color:var(--text);
              border-radius:50%; animation:spin .5s linear infinite;
              vertical-align:middle; margin-left:6px; }

/* Clickable label links */
.hl-link { pointer-events:auto; cursor:pointer; color:var(--yellow); text-decoration:underline;
           text-decoration-color:transparent; transition:text-decoration-color .15s, color .15s; }
.hl-link:hover { text-decoration-color:var(--accent); color:var(--accent); }

/* Label flash on navigation */
.hl-flash { background:rgba(126,131,209,.35); border-radius:2px; }
@keyframes flash-fade { from { background:rgba(126,131,209,.4); } to { background:transparent; } }
.hl-flash { animation:flash-fade 2s ease-out forwards; }

/* Toolbar nav buttons */
#btn-nav-back, #btn-goto { background:transparent; color:var(--dim); border:1px solid var(--bg3);
           padding:4px 7px; border-radius:4px; cursor:pointer; line-height:0; transition:color .15s, border-color .15s; }
#btn-nav-back:hover:not(:disabled), #btn-goto:hover:not(:disabled) {
           color:var(--accent); border-color:var(--accent); }
#btn-nav-back:disabled, #btn-goto:disabled { opacity:.3; cursor:not-allowed; }
.toolbar-sep { width:1px; height:18px; background:var(--bg3); display:inline-block; vertical-align:middle; margin:0 4px; }

/* Search / Goto overlay */
.search-overlay { position:fixed; inset:0; background:rgba(0,0,0,.45); z-index:200;
                  display:flex; justify-content:center; padding-top:18vh; }
.search-overlay[hidden] { display:none; }
.search-box { background:var(--bg2); border:1px solid var(--accent); border-radius:8px;
              width:480px; max-width:90vw; max-height:400px; display:flex; flex-direction:column;
              box-shadow:0 8px 32px rgba(0,0,0,.5); align-self:start; overflow:hidden; }
.goto-box { max-height:120px; }
#goto-input { background:var(--bg); border:none; border-bottom:1px solid var(--bg3);
                color:var(--text); padding:12px 16px; font-family:inherit; font-size:14px;
                outline:none; }
#goto-input::placeholder { color:var(--dim); }
#goto-result { padding:8px 16px; font-size:12px; color:var(--dim); }
/* Memory map panel */
#memmap-panel { background:var(--bg3); border-radius:6px; padding:10px; }
.memmap-header { display:flex; justify-content:space-between; align-items:center; margin-bottom:6px; }
.memmap-title { font-size:11px; text-transform:uppercase; letter-spacing:1px; color:var(--dim); }
#memmap-tooltip { font-size:10px; color:var(--subtext); min-height:13px; }
#memmap-canvas { width:100%; height:40px; border-radius:3px; cursor:pointer; display:block; }
.memmap-legend { display:flex; flex-wrap:wrap; gap:6px 10px; margin-top:6px; }
.ml-item { font-size:9px; color:var(--dim); display:flex; align-items:center; gap:3px; }
.ml-swatch { width:8px; height:8px; border-radius:2px; display:inline-block; }