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

:root {
  --bg:       #0d1117;
  --surface:  #161b22;
  --surface2: #1c2333;
  --border:   #30363d;
  --green:    #39d353;
  --green2:   #56d364;
  --green-dim:#1a4a24;
  --amber:    #e3b341;
  --blue:     #58a6ff;
  --red:      #f85149;
  --text:     #c9d1d9;
  --muted:    #484f58;
  --white:    #f0f6fc;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  min-height: 100vh;
  overflow-x: hidden;
  cursor: default;
}

body::before {
  content: '';
  position: fixed; inset: 0;
  background: repeating-linear-gradient(
    0deg, transparent, transparent 2px,
    rgba(0,0,0,.03) 2px, rgba(0,0,0,.03) 4px
  );
  pointer-events: none;
  z-index: 100;
}

/* ── TOP BAR ── */
.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex;
  align-items: center;
  height: 40px;
  position: sticky;
  top: 0;
  z-index: 50;
}
.tb-dots { display: flex; gap: 6px; padding-right: 16px; border-right: 1px solid var(--border); }
.tb-dot  { width: 12px; height: 12px; border-radius: 50%; }
.tb-dot.r { background: var(--red); }
.tb-dot.y { background: var(--amber); }
.tb-dot.g { background: var(--green); }
.tb-title {
  flex: 1; text-align: center;
  font-size: .72rem; color: var(--muted); letter-spacing: .06em;
}
.tb-right { display: flex; align-items: center; gap: 14px; }
.tb-status { font-size: .68rem; color: var(--green); letter-spacing: .08em; }
.tb-status::before { content: '● '; animation: blink 1.2s step-end infinite; }

/* ── LANG SWITCHER ── */
.lang-switcher {
  display: flex; gap: 4px;
  border-left: 1px solid var(--border);
  padding-left: 14px;
}
.lang-btn {
  background: none;
  border: 1px solid transparent;
  border-radius: 3px;
  color: var(--muted);
  cursor: pointer;
  font-family: 'JetBrains Mono', monospace;
  font-size: .65rem; letter-spacing: .08em;
  padding: 3px 7px;
  transition: color .15s, border-color .15s;
}
.lang-btn:hover { color: var(--text); border-color: var(--border); }
.lang-btn.active { color: var(--green); border-color: rgba(57,211,83,.4); }

/* ── MAIN ── */
.wrapper { max-width: 860px; margin: 0 auto; padding: 0 24px 60px; }

/* ── TERMINAL ── */
.terminal {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 6px; margin: 40px 0 32px; overflow: hidden;
  animation: fadeUp .5s .05s ease both;
}
.terminal-bar {
  background: var(--surface2); border-bottom: 1px solid var(--border);
  padding: 10px 16px; display: flex; align-items: center; gap: 8px;
  font-size: .72rem; color: var(--muted);
}
.terminal-body { padding: 28px 32px 36px; font-family: 'Share Tech Mono', monospace; }
.t-line    { margin-bottom: 6px; line-height: 1.7; }
.t-prompt  { color: var(--green); }
.t-cmd     { color: var(--white); }
.t-key     { color: var(--blue); }
.t-val     { color: var(--amber); }
.t-str     { color: var(--green2); }
.t-comment { color: var(--muted); font-style: italic; }
.t-domain {
  font-family: 'JetBrains Mono', monospace;
  font-size: clamp(1.8rem, 6vw, 3.4rem); font-weight: 800;
  color: var(--green); letter-spacing: -.02em; margin: 20px 0 8px;
  text-shadow: 0 0 40px rgba(57,211,83,.3);
}
.t-tag {
  display: inline-block; background: var(--green-dim); color: var(--green2);
  border: 1px solid rgba(57,211,83,.3); border-radius: 2px;
  font-size: .68rem; padding: 2px 8px; letter-spacing: .08em;
  margin-right: 6px; margin-bottom: 6px;
}
.cursor {
  display: inline-block; width: 10px; height: 1.1em;
  background: var(--green); vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}

/* ── STATS ── */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; background: var(--border);
  border: 1px solid var(--border); border-radius: 6px;
  overflow: hidden; margin-bottom: 32px;
  animation: fadeUp .5s .15s ease both;
}
.stat { background: var(--surface); padding: 20px 18px; position: relative; }
.stat::before {
  content: attr(data-idx); position: absolute; top: 10px; right: 14px;
  font-size: .62rem; color: var(--muted); font-family: 'Share Tech Mono', monospace;
}
.stat-label { font-size: .62rem; color: var(--muted); letter-spacing: .1em; text-transform: uppercase; margin-bottom: 8px; }
.stat-value { font-size: 1.35rem; font-weight: 700; color: var(--white); }
.stat-value.green { color: var(--green); }
.stat-value.amber { color: var(--amber); }
.stat-value.blue  { color: var(--blue); }
.stat-sub { font-size: .65rem; color: var(--muted); margin-top: 4px; }

/* ── SECTION HEAD ── */
.sec-head {
  display: flex; align-items: center; gap: 10px;
  font-size: .72rem; color: var(--muted); letter-spacing: .08em; margin-bottom: 16px;
}
.sec-head .arrow { color: var(--green); }
.sec-head span { color: var(--white); }

/* ── FEATURES ── */
.features {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 12px; margin-bottom: 32px;
  animation: fadeUp .5s .25s ease both;
}
.feat {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 6px; padding: 20px 18px; transition: border-color .2s;
}
.feat:hover { border-color: rgba(57,211,83,.4); }
.feat-icon  { font-size: 1.2rem; margin-bottom: 10px; }
.feat-title { font-size: .72rem; color: var(--green2); letter-spacing: .06em; margin-bottom: 6px; }
.feat-desc  { font-size: .68rem; color: var(--muted); line-height: 1.65; }

/* ── FORM ── */
.form-wrap {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 6px; overflow: hidden; margin-bottom: 32px;
  animation: fadeUp .5s .35s ease both;
}
.form-header {
  background: var(--surface2); border-bottom: 1px solid var(--border);
  padding: 12px 20px; display: flex; align-items: center; gap: 10px;
  font-size: .72rem; color: var(--muted);
}
.form-header .filename { color: var(--amber); }
.form-header .lang-tag {
  margin-left: auto; background: var(--green-dim); color: var(--green2);
  border-radius: 3px; padding: 2px 8px; font-size: .62rem;
}
.form-body { padding: 28px 28px 32px; }
form { display: flex; flex-direction: column; gap: 18px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
label { font-size: .65rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
label .req { color: var(--green); margin-left: 2px; }
input, textarea, select {
  background: var(--bg); border: 1px solid var(--border); border-radius: 4px;
  color: var(--text); font-family: 'JetBrains Mono', monospace; font-size: .8rem;
  padding: 10px 14px; transition: border-color .2s, box-shadow .2s;
  outline: none; width: 100%; -webkit-appearance: none;
}
input::placeholder, textarea::placeholder { color: var(--muted); opacity: .5; }
input:focus, textarea:focus, select:focus {
  border-color: rgba(57,211,83,.5); box-shadow: 0 0 0 3px rgba(57,211,83,.06);
}
textarea { resize: vertical; min-height: 110px; }
select { cursor: pointer; }
select option { background: var(--surface); }
.field-code { position: relative; }
.field-code textarea { padding-left: 42px; }
.line-nums {
  position: absolute; top: 10px; left: 0; width: 32px;
  text-align: right; font-family: 'Share Tech Mono', monospace;
  font-size: .7rem; color: var(--muted); pointer-events: none;
  line-height: 1.56rem; padding-right: 6px;
  border-right: 1px solid var(--border); user-select: none;
}
.btn-row { display: flex; align-items: center; gap: 14px; }
.submit-btn {
  background: var(--green); border: none; border-radius: 4px; color: #0d1117;
  cursor: pointer; font-family: 'JetBrains Mono', monospace; font-size: .78rem;
  font-weight: 700; letter-spacing: .06em; padding: 12px 28px;
  transition: background .2s, transform .1s, box-shadow .2s;
}
.submit-btn:hover { background: var(--green2); box-shadow: 0 0 20px rgba(57,211,83,.3); }
.submit-btn:active { transform: scale(.98); }
.btn-hint { font-size: .65rem; color: var(--muted); }
.btn-hint kbd {
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 3px; padding: 1px 5px;
  font-family: 'JetBrains Mono', monospace; font-size: .62rem; color: var(--text);
}
.status {
  display: none; padding: 12px 16px; border-radius: 4px;
  font-size: .75rem; font-family: 'Share Tech Mono', monospace;
}
.status.success { display: block; background: rgba(57,211,83,.08); border: 1px solid rgba(57,211,83,.3); color: var(--green); }
.status.error   { display: block; background: rgba(248,81,73,.08); border: 1px solid rgba(248,81,73,.3); color: var(--red); }

/* ── FOOTER ── */
footer {
  border-top: 1px solid var(--border); padding: 20px 0 0;
  display: flex; justify-content: space-between; align-items: center;
  font-size: .65rem; color: var(--muted); font-family: 'Share Tech Mono', monospace;
}
footer a { color: var(--blue); text-decoration: none; }
footer a:hover { text-decoration: underline; }

@keyframes blink   { 0%,100%{opacity:1} 50%{opacity:0} }
@keyframes fadeUp  { from{opacity:0;transform:translateY(16px)} to{opacity:1;transform:translateY(0)} }

@media (max-width: 600px) {
  .stats    { grid-template-columns: 1fr 1fr; }
  .features { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .tb-title { display: none; }
  .terminal-body { padding: 20px 18px 28px; }
  footer { flex-direction: column; gap: 8px; }
}