style.css

/* ============================================================
   AsmCode — NASM x86 Editor
   black & white · animations · by ExEintel
   ============================================================ */

/* ---------- themes ---------- */
:root {
  --mono: "Cascadia Code", "JetBrains Mono", Consolas, "SF Mono", Menlo, monospace;
  --ui: "Segoe UI", system-ui, -apple-system, sans-serif;
  --transition: 0.35s ease;
}

html[data-theme="dark"] {
  --bg: #060606;
  --bg2: #0a0a0a;
  --panel: #0d0d0d;
  --panel2: #121212;
  --panel3: #171717;
  --line: #242424;
  --line2: #333333;
  --text: #f2f2f2;
  --muted: #9a9a9a;
  --dim: #6b6b6b;
  --faint: #464646;
  --caret: #ffffff;
  --sel-bg: rgba(255, 255, 255, 0.14);
  --invert-bg: #ffffff;
  --invert-text: #0a0a0a;
  --active-bg: rgba(255, 255, 255, 0.07);
  --err-bg: rgba(255, 255, 255, 0.10);
  --glow: rgba(255, 255, 255, 0.10);
  --glow-soft: rgba(255, 255, 255, 0.05);
  /* syntax tones */
  --t-ins: #ffffff;
  --t-reg: #d9d9d9;
  --t-num: #bdbdbd;
  --t-str: #a8a8a8;
  --t-dir: #8f8f8f;
  --t-cm: #545454;
  --t-lbl: #ffffff;
}

html[data-theme="light"] {
  --bg: #f2f2f2;
  --bg2: #fafafa;
  --panel: #ffffff;
  --panel2: #f6f6f6;
  --panel3: #ececec;
  --line: #d8d8d8;
  --line2: #c6c6c6;
  --text: #141414;
  --muted: #5c5c5c;
  --dim: #878787;
  --faint: #adadad;
  --caret: #000000;
  --sel-bg: rgba(0, 0, 0, 0.12);
  --invert-bg: #000000;
  --invert-text: #ffffff;
  --active-bg: rgba(0, 0, 0, 0.055);
  --err-bg: rgba(0, 0, 0, 0.06);
  --glow: rgba(0, 0, 0, 0.10);
  --glow-soft: rgba(0, 0, 0, 0.05);
  /* syntax tones */
  --t-ins: #000000;
  --t-reg: #2b2b2b;
  --t-num: #3d3d3d;
  --t-str: #555555;
  --t-dir: #6f6f6f;
  --t-cm: #a0a0a0;
  --t-lbl: #000000;
}

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

html, body { height: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--ui);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: background-color var(--transition), color var(--transition);
}

::selection { background: var(--invert-bg); color: var(--invert-text); }

/* scrollbars */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--line2); border: 2px solid var(--panel); }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }
::-webkit-scrollbar-corner { background: transparent; }

/* ---------- animated background ---------- */
.bg { position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.bg-grid {
  position: absolute; inset: -200px;
  background-image:
    linear-gradient(var(--glow-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--glow-soft) 1px, transparent 1px);
  background-size: 56px 56px;
  animation: gridMove 40s linear infinite;
}
@keyframes gridMove {
  from { transform: translate(0, 0); }
  to   { transform: translate(56px, 56px); }
}
.bg-glow {
  position: absolute; width: 60vmax; height: 60vmax; border-radius: 50%;
  background: radial-gradient(circle, var(--glow) 0%, transparent 60%);
  filter: blur(40px);
  animation: breathe 9s ease-in-out infinite;
}
.bg-glow-a { top: -20vmax; left: -12vmax; }
.bg-glow-b { bottom: -24vmax; right: -14vmax; animation-delay: -4.5s; }
@keyframes breathe {
  0%, 100% { opacity: 0.35; transform: scale(1); }
  50%      { opacity: 0.9;  transform: scale(1.08); }
}

/* ---------- topbar ---------- */
.topbar {
  position: relative;
  z-index: 10;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  background: color-mix(in srgb, var(--panel) 82%, transparent);
  backdrop-filter: blur(10px);
  animation: dropDown 0.7s cubic-bezier(0.2, 0.7, 0.2, 1) both;
}
@keyframes dropDown {
  from { opacity: 0; transform: translateY(-16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.tb { display: flex; align-items: center; gap: 10px; }
.tb-left { justify-content: flex-start; }
.tb-right { justify-content: flex-end; }
.tb-divider { width: 1px; height: 22px; background: var(--line2); }

/* ---------- buttons ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line2);
  font-family: inherit;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  overflow: hidden;
  transition: color var(--transition), border-color var(--transition),
              box-shadow var(--transition), transform 0.18s ease, background var(--transition);
}
.btn:hover {
  border-color: var(--text);
  box-shadow: 0 0 20px var(--glow);
  transform: translateY(-1px);
}
.btn:active { transform: translateY(0) scale(0.98); }
.btn:disabled { opacity: 0.32; cursor: not-allowed; transform: none; box-shadow: none; }

.btn-ic { font-size: 13px; line-height: 1; }

.icon-btn { padding: 9px 11px; font-size: 16px; }
.icon-btn .theme-sym { display: inline-block; transition: transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1); }
.icon-btn:hover .theme-sym { transform: rotate(180deg); }

.btn.primary {
  background: var(--invert-bg);
  color: var(--invert-text);
  border-color: var(--invert-bg);
}
.btn.primary::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(120deg, transparent 30%, var(--glow) 50%, transparent 70%);
  transform: translateX(-120%);
  transition: transform 0.7s ease;
}
.btn.primary:hover::after { transform: translateX(120%); }
.btn.primary:hover { box-shadow: 0 0 26px var(--glow); }

.btn.run:hover { box-shadow: 0 0 22px var(--glow); }

/* ---------- logo ---------- */
.logo { display: flex; align-items: center; gap: 13px; user-select: none; }
.logo-mark {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 3px 8px;
  border: 1px solid var(--text);
  color: var(--text);
  animation: logoPulse 3.2s ease-in-out infinite;
}
@keyframes logoPulse {
  0%, 100% { box-shadow: 0 0 0 0 var(--glow); }
  50%      { box-shadow: 0 0 22px 2px var(--glow); }
}
.logo-txt h1 {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.34em;
  line-height: 1;
  background: linear-gradient(90deg, var(--text), var(--muted), var(--text));
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 5s linear infinite;
}
@keyframes shimmer {
  from { background-position: 200% 0; }
  to   { background-position: -200% 0; }
}
.logo-txt p {
  margin-top: 4px;
  font-size: 9.5px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--dim);
}
.logo-txt p span { color: var(--text); font-weight: 700; }

/* ---------- main layout ---------- */
.layout {
  position: relative;
  z-index: 5;
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 258px minmax(0, 1fr) 316px;
  gap: 12px;
  padding: 12px;
}

/* ---------- panels ---------- */
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
  animation: rise 0.7s cubic-bezier(0.2, 0.7, 0.2, 1) both;
  transition: background var(--transition), border-color var(--transition);
}
.regs-panel   { animation-delay: 0.08s; }
.editor-panel { animation-delay: 0.16s; }
.out-panel    { animation-delay: 0.24s; }
@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 13px 14px 9px;
}
.panel-head.sub { padding-top: 16px; }
.panel-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--muted);
}
.panel-live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--dim);
}
.panel-live i {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--text);
  animation: blink 1.6s ease-in-out infinite;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.15; } }

/* ---------- registers ---------- */
.regs-grid {
  display: grid;
  gap: 5px;
  padding: 4px 14px 6px;
}
.reg {
  display: grid;
  grid-template-columns: 46px 1fr auto;
  align-items: center;
  gap: 8px;
  padding: 6px 9px;
  background: var(--panel2);
  border: 1px solid var(--line);
  transition: border-color var(--transition), background var(--transition);
}
.reg:hover { border-color: var(--line2); }
.reg-name {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.reg-hex {
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.02em;
}
.reg-dec {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--dim);
}
.reg.changed {
  animation: regFlash 0.6s ease-out;
}
@keyframes regFlash {
  0%   { background: var(--invert-bg); border-color: var(--invert-bg); transform: scale(1.04); }
  100% { transform: scale(1); }
}

/* flags */
.flags-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 5px;
  padding: 0 14px 4px;
}
.flag {
  font-family: var(--mono);
  font-size: 10.5px;
  text-align: center;
  padding: 5px 0;
  border: 1px solid var(--line);
  color: var(--faint);
  transition: all 0.25s ease;
}
.flag b { display: block; font-size: 12px; }
.flag.on {
  background: var(--invert-bg);
  color: var(--invert-text);
  border-color: var(--invert-bg);
  font-weight: 700;
  animation: flagPop 0.3s ease-out;
}
@keyframes flagPop {
  0% { transform: scale(0.8); }
  60% { transform: scale(1.12); }
  100% { transform: scale(1); }
}

/* vm stats */
.vm-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 5px;
  padding: 0 14px 6px;
}
.stat {
  background: var(--panel2);
  border: 1px solid var(--line);
  padding: 7px 8px;
  text-align: center;
}
.stat span {
  display: block;
  font-size: 9px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 3px;
}
.stat b {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text);
  word-break: break-all;
}

.regs-note {
  margin-top: auto;
  padding: 10px 14px 12px;
  border-top: 1px solid var(--line);
  font-size: 10.5px;
  line-height: 1.55;
  color: var(--dim);
}
.regs-note p + p { margin-top: 4px; }
.regs-note b { color: var(--muted); font-weight: 700; }

/* ---------- editor ---------- */
.editor-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--panel2);
}
.file-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 4px 10px;
  border: 1px solid var(--line2);
  background: var(--panel);
}
.file-tab .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--text);
}
.editor-hint {
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--dim);
}
.editor-pos {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--dim);
}

.editor {
  flex: 1;
  min-height: 0;
  display: flex;
  background: var(--bg2);
  position: relative;
}

.gutter {
  flex: none;
  width: 48px;
  overflow: hidden;
  padding: 10px 9px 10px 0;
  text-align: right;
  border-right: 1px solid var(--line);
  background: var(--panel2);
  user-select: none;
}
.gl {
  display: block;
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.6;
  color: var(--faint);
  transition: color 0.2s;
}
.gl.active { color: var(--text); font-weight: 700; }
.gl.err { color: var(--invert-bg); font-weight: 700; text-decoration: underline wavy var(--invert-bg); }

.editor-wrap { flex: 1; min-width: 0; position: relative; }

.highlight, .editor-wrap textarea {
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.6;
  tab-size: 4;
}

.highlight {
  position: absolute;
  inset: 0;
  margin: 0;
  overflow: hidden;
  padding: 10px 14px;
  pointer-events: none;
  white-space: pre;
  color: var(--text);
}
.highlight .row {
  display: block;
  width: max-content;
  min-width: 100%;
  white-space: pre;
  transition: background 0.2s;
}
.highlight .row.active {
  background: var(--active-bg);
  animation: linePulse 1.6s ease-in-out infinite;
}
@keyframes linePulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.5; }
}
.highlight .row.line-err {
  background: var(--err-bg);
  box-shadow: inset 3px 0 0 var(--invert-bg);
}

.editor-wrap textarea {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  padding: 10px 14px;
  border: 0;
  outline: 0;
  resize: none;
  overflow: auto;
  background: transparent;
  color: transparent;
  caret-color: var(--caret);
  white-space: pre;
  caret-shape: block;
}

/* syntax tokens */
.tok-ins { color: var(--t-ins); font-weight: 700; }
.tok-reg { color: var(--t-reg); font-weight: 600; }
.tok-dir { color: var(--t-dir); font-weight: 600; }
.tok-num { color: var(--t-num); font-weight: 600; }
.tok-str { color: var(--t-str); font-style: italic; }
.tok-cm  { color: var(--t-cm); font-style: italic; }
.tok-lbl { color: var(--t-lbl); font-weight: 700; text-decoration: underline; }

/* ---------- output panel ---------- */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--line);
}
.tab {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 0;
  background: transparent;
  color: var(--muted);
  border: 0;
  border-bottom: 2px solid transparent;
  font-family: inherit;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color 0.25s, border-color 0.25s;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--text); border-bottom-color: var(--text); }
.badge {
  min-width: 18px;
  padding: 1px 6px;
  font-size: 10px;
  background: var(--invert-bg);
  color: var(--invert-text);
  border-radius: 20px;
}

.tab-bodies { flex: 1; min-height: 0; position: relative; }
.tab-body {
  position: absolute;
  inset: 0;
  display: none;
  flex-direction: column;
}
.tab-body.active { display: flex; }

.console {
  flex: 1;
  overflow: auto;
  margin: 0;
  padding: 12px 14px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-all;
}
.system {
  color: var(--dim);
  font-style: italic;
}
.prog-out { min-height: 1em; }
.system.ok { color: var(--text); font-style: normal; }
.system.err { color: var(--invert-text); background: var(--invert-bg); padding: 0 4px; font-style: normal; }

.stdin-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-top: 1px solid var(--line);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
}
.stdin-row input {
  flex: 1;
  background: var(--panel2);
  border: 1px solid var(--line2);
  color: var(--text);
  font-family: var(--mono);
  font-size: 12px;
  padding: 6px 9px;
  outline: none;
  transition: border-color 0.25s;
}
.stdin-row input:focus { border-color: var(--text); }

.errors {
  flex: 1;
  overflow: auto;
  padding: 12px 14px;
}
.err-item {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 10px;
  margin-bottom: 6px;
  background: var(--err-bg);
  border: 1px solid var(--line);
  box-shadow: inset 2px 0 0 var(--invert-bg);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
  animation: errIn 0.3s ease-out both;
}
@keyframes errIn {
  from { opacity: 0; transform: translateX(8px); }
  to   { opacity: 1; transform: translateX(0); }
}
.err-item b { color: var(--text); flex: none; }
.errors-empty { color: var(--dim); font-size: 12px; font-style: italic; padding: 10px 2px; }

/* ---------- status bar ---------- */
.statusbar {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 7px 18px;
  font-size: 11.5px;
  letter-spacing: 0.03em;
  color: var(--dim);
  border-top: 1px solid var(--line);
  background: var(--panel2);
  animation: rise 0.7s ease 0.3s both;
}
.statusbar #statusMsg { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.status-right { flex: none; color: var(--faint); }

/* ---------- toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 54px;
  transform: translate(-50%, 24px);
  z-index: 100;
  padding: 11px 22px;
  background: var(--invert-bg);
  color: var(--invert-text);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.03em;
  box-shadow: 0 0 30px var(--glow);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease, transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- responsive ---------- */
@media (max-width: 1180px) {
  .layout {
    grid-template-columns: 220px minmax(0, 1fr) 260px;
  }
  .btn-txt { display: none; }
  .btn { padding: 9px 11px; }
}

@media (max-width: 920px) {
  body { overflow: auto; }
  .layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto minmax(360px, 1fr) 300px;
    overflow: visible;
  }
  .topbar { grid-template-columns: 1fr auto; }
  .tb-center { display: none; }
  .btn-txt { display: inline; }
}