/* AutoML Studio — hand-written CSS, no framework.
   Palette: near-black ground, cyan primary, violet secondary. */

:root {
  --bg:        #0b0f17;
  --bg-raised: #111725;
  --surface:   #151d2e;
  --surface-2: #1b2438;
  --border:    #26304a;
  --border-lit:#38456b;

  --text:      #e8edf7;
  --text-dim:  #97a3bd;
  --text-mute: #6b7794;

  --primary:   #39d6d0;
  --primary-d: #0f9d97;
  --violet:    #a78bfa;
  --amber:     #f5b445;
  --red:       #fb7185;
  --green:     #4ade80;

  --radius: 10px;
  --radius-lg: 16px;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, monospace;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --shadow: 0 12px 32px -12px rgba(0,0,0,.7);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 15px;
  /* Two very soft radial washes stop the near-black from reading as flat. */
  background-image:
    radial-gradient(900px 500px at 12% -8%, rgba(57,214,208,.09), transparent 60%),
    radial-gradient(760px 460px at 92% 4%, rgba(167,139,250,.08), transparent 62%);
  background-attachment: fixed;
}

.wrap { width: min(1120px, 100% - 3rem); margin-inline: auto; }

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: var(--mono); font-size: .9em; color: var(--violet); }

/* ── Masthead ─────────────────────────────────────────────── */
.masthead {
  border-bottom: 1px solid var(--border);
  background: rgba(11,15,23,.82);
  backdrop-filter: blur(12px);
  position: sticky; top: 0; z-index: 50;
  padding: .9rem 0;
}
.masthead .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1.5rem; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: .85rem; }
.brand-mark {
  font-size: 1.6rem; color: var(--primary);
  filter: drop-shadow(0 0 14px rgba(57,214,208,.6));
}
.brand h1 { margin: 0; font-size: 1.18rem; letter-spacing: -.02em; font-weight: 650; }
.tagline { margin: 0; font-size: .82rem; color: var(--text-dim); }
.tagline em { color: var(--primary); font-style: italic; }

.badges { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; }
.badge {
  font-size: .72rem; padding: .32rem .68rem; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface);
  color: var(--text-dim); font-family: var(--mono); white-space: nowrap;
  /* The runtime string is long; let it truncate rather than widen the page. */
  max-width: 100%; overflow: hidden; text-overflow: ellipsis;
}
.badge-privacy { border-color: rgba(74,222,128,.35); color: var(--green); }
.badge-privacy .dot {
  display: inline-block; width: 6px; height: 6px; border-radius: 50%;
  background: var(--green); margin-right: .3rem;
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 1 } 50% { opacity: .35 } }
.badge-link:hover { border-color: var(--primary); color: var(--primary); text-decoration: none; }

/* ── Boot overlay ─────────────────────────────────────────── */
.boot {
  position: fixed; inset: 0; z-index: 100;
  display: grid; place-items: center;
  background: rgba(11,15,23,.96); backdrop-filter: blur(6px);
}
.boot[hidden] { display: none; }
.boot-card {
  text-align: center; max-width: 460px; padding: 2.5rem 2rem;
}
.boot-card h2 { margin: 1.4rem 0 1rem; font-size: 1.05rem; font-weight: 550; }
.boot-spinner {
  width: 46px; height: 46px; margin-inline: auto; border-radius: 50%;
  border: 3px solid var(--border); border-top-color: var(--primary);
  animation: spin .9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg) } }
.boot-note { font-size: .78rem; color: var(--text-mute); margin-top: 1.1rem; }
.boot-error {
  margin-top: 1.2rem; padding: .9rem; border-radius: var(--radius);
  background: rgba(251,113,133,.1); border: 1px solid rgba(251,113,133,.4);
  color: var(--red); font-size: .8rem; font-family: var(--mono); text-align: left;
}

.bar {
  height: 5px; background: var(--surface-2); border-radius: 999px; overflow: hidden;
}
.bar-fill {
  height: 100%; width: 0;
  background: linear-gradient(90deg, var(--primary-d), var(--primary));
  border-radius: 999px; transition: width .35s ease;
}

/* ── Steps ────────────────────────────────────────────────── */
main { padding: 2.5rem 0 4rem; }
.step {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
  animation: rise .45s cubic-bezier(.2,.7,.3,1) both;
}
@keyframes rise { from { opacity: 0; transform: translateY(14px) } }
.step[hidden] { display: none; }

.step-head { display: flex; align-items: center; gap: .8rem; margin-bottom: 1.3rem; }
.step-num {
  width: 27px; height: 27px; flex: none; border-radius: 50%;
  display: grid; place-items: center;
  background: linear-gradient(140deg, var(--primary), var(--primary-d));
  color: #04201f; font-weight: 750; font-size: .82rem;
}
.step-head h2 { margin: 0; font-size: 1.1rem; font-weight: 600; letter-spacing: -.01em; }

.sub {
  font-size: .93rem; font-weight: 600; margin: 1.9rem 0 .85rem;
  display: flex; align-items: baseline; gap: .6rem; flex-wrap: wrap;
}
.hint { font-size: .74rem; font-weight: 400; color: var(--text-mute); }
.lead { color: var(--text-dim); font-size: .88rem; margin: 0 0 1.2rem; }

/* ── Dropzone ─────────────────────────────────────────────── */
.dropzone {
  border: 2px dashed var(--border-lit); border-radius: var(--radius-lg);
  padding: 2.8rem 1.5rem; text-align: center; cursor: pointer;
  transition: border-color .2s, background .2s, transform .2s;
  background: var(--surface);
}
.dropzone:hover, .dropzone:focus-visible, .dropzone.over {
  border-color: var(--primary); background: rgba(57,214,208,.06);
  transform: translateY(-2px); outline: none;
}
.dz-icon { font-size: 2rem; color: var(--primary); }
.dz-title { margin: .6rem 0 .25rem; font-weight: 550; }
.dz-sub { margin: 0; font-size: .8rem; color: var(--text-mute); }

.samples {
  margin-top: 1.1rem; display: flex; gap: .5rem; align-items: center; flex-wrap: wrap;
}
.samples-label { font-size: .8rem; color: var(--text-mute); }
.chip {
  font: inherit; font-size: .78rem; cursor: pointer;
  padding: .4rem .8rem; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text-dim);
  transition: all .18s;
}
.chip em { color: var(--text-mute); font-style: normal; font-size: .9em; }
.chip:hover { border-color: var(--primary); color: var(--text); background: var(--surface-2); }

/* ── Stats + column cards ─────────────────────────────────── */
.stat-row {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: .75rem;
}
.stat {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: .85rem 1rem;
}
.stat-val { font-size: 1.35rem; font-weight: 650; font-family: var(--mono); letter-spacing: -.02em; }
.stat-lab { font-size: .72rem; color: var(--text-mute); text-transform: uppercase; letter-spacing: .06em; }

.col-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(232px, 1fr)); gap: .7rem;
}
.col-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: .8rem .9rem; font-size: .8rem;
  border-left: 3px solid var(--border-lit);
}
.col-card.role-numeric     { border-left-color: var(--primary); }
.col-card.role-categorical { border-left-color: var(--violet); }
.col-card.role-datetime    { border-left-color: var(--amber); }
.col-card.role-text        { border-left-color: #f472b6; }
.col-card.role-identifier,
.col-card.role-constant    { border-left-color: var(--text-mute); opacity: .62; }

.col-name {
  font-family: var(--mono); font-weight: 600; font-size: .82rem;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.col-role {
  display: inline-block; font-size: .66rem; text-transform: uppercase;
  letter-spacing: .07em; color: var(--text-mute); margin: .18rem 0 .45rem;
}
.col-meta { color: var(--text-dim); font-size: .74rem; line-height: 1.5; }
.col-warn { color: var(--amber); font-size: .72rem; margin-top: .4rem; }

/* ── Tables ───────────────────────────────────────────────── */
.table-scroll { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); }
table { border-collapse: collapse; width: 100%; font-size: .81rem; }
th, td { padding: .55rem .8rem; text-align: left; border-bottom: 1px solid var(--border); white-space: nowrap; }
th {
  background: var(--surface-2); font-weight: 600; font-size: .72rem;
  text-transform: uppercase; letter-spacing: .05em; color: var(--text-dim);
  position: sticky; top: 0;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--surface); }
td.num { font-family: var(--mono); }

.preview { margin-top: 1.4rem; }
.preview summary {
  cursor: pointer; font-size: .82rem; color: var(--text-dim);
  padding: .5rem 0; user-select: none;
}
.preview summary:hover { color: var(--primary); }

.leaderboard tr.best { background: rgba(57,214,208,.08); }
.leaderboard tr.best td:first-child { box-shadow: inset 3px 0 0 var(--primary); }
.leaderboard tr.failed { opacity: .48; }
.model-label { font-weight: 600; }
.model-blurb { font-size: .72rem; color: var(--text-mute); white-space: normal; max-width: 300px; }
.tag {
  font-size: .64rem; padding: .12rem .45rem; border-radius: 4px;
  font-family: var(--mono); text-transform: uppercase; letter-spacing: .04em;
}
.tag-best { background: rgba(57,214,208,.18); color: var(--primary); }
.tag-overfit { background: rgba(245,180,69,.16); color: var(--amber); }
.tag-fail { background: rgba(251,113,133,.15); color: var(--red); }

/* ── Task banner + alerts ─────────────────────────────────── */
.task-banner {
  background: linear-gradient(135deg, rgba(57,214,208,.11), rgba(167,139,250,.09));
  border: 1px solid var(--border-lit); border-radius: var(--radius);
  padding: 1rem 1.15rem; margin-bottom: 1rem;
}
.task-kind { font-size: 1rem; font-weight: 650; color: var(--primary); }
.task-reason { font-size: .82rem; color: var(--text-dim); margin-top: .15rem; }

.alert {
  padding: .8rem 1rem; border-radius: var(--radius); font-size: .82rem;
  margin: .5rem 0; border: 1px solid;
}
.alert[hidden] { display: none; }
.alert-error { background: rgba(251,113,133,.09); border-color: rgba(251,113,133,.4); color: var(--red); }
.alert-warn  { background: rgba(245,180,69,.08); border-color: rgba(245,180,69,.35); color: var(--amber); }

/* ── Forms ────────────────────────────────────────────────── */
.config { display: flex; gap: 1rem; align-items: flex-end; flex-wrap: wrap; }
.field { display: flex; flex-direction: column; gap: .3rem; min-width: 210px; flex: 1 1 210px; }
.field-label { font-size: .76rem; font-weight: 600; color: var(--text-dim); }
.field-help { font-size: .72rem; color: var(--text-mute); }

select, input, textarea {
  font: inherit; font-size: .85rem;
  background: var(--surface); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  padding: .5rem .65rem; width: 100%;
  transition: border-color .18s;
}
select:focus, input:focus, textarea:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(57,214,208,.14);
}
textarea { resize: vertical; min-height: 62px; font-family: var(--sans); }

.btn {
  font: inherit; font-size: .85rem; font-weight: 600; cursor: pointer;
  padding: .58rem 1.35rem; border-radius: 8px; border: 1px solid transparent;
  transition: transform .15s, box-shadow .15s, opacity .15s;
}
.btn-primary {
  background: linear-gradient(140deg, var(--primary), var(--primary-d));
  color: #042220;
}
.btn-primary:hover:not(:disabled) {
  transform: translateY(-1px); box-shadow: 0 8px 20px -8px rgba(57,214,208,.7);
}
.btn:disabled { opacity: .5; cursor: not-allowed; }

.predict-form {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(215px, 1fr));
  gap: .85rem; margin-bottom: 1.2rem;
}

.progress { margin-top: 1.2rem; }
.progress p { font-size: .8rem; color: var(--text-dim); margin: .5rem 0 0; font-family: var(--mono); }

/* ── Importance bars ──────────────────────────────────────── */
.importance { display: flex; flex-direction: column; gap: .4rem; }
.imp-row { display: grid; grid-template-columns: minmax(90px, 170px) 1fr auto; gap: .7rem; align-items: center; }
.imp-name {
  font-family: var(--mono); font-size: .75rem; color: var(--text-dim);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.imp-track { background: var(--surface-2); border-radius: 4px; height: 17px; overflow: hidden; }
.imp-bar {
  height: 100%; border-radius: 4px;
  background: linear-gradient(90deg, var(--primary-d), var(--primary));
  animation: grow .6s cubic-bezier(.2,.8,.3,1) both;
}
@keyframes grow { from { width: 0 !important } }
.imp-val { font-family: var(--mono); font-size: .73rem; color: var(--text-mute); }

/* ── Prediction result ────────────────────────────────────── */
.prediction {
  margin-top: 1.2rem; padding: 1.3rem;
  background: linear-gradient(135deg, rgba(57,214,208,.1), rgba(167,139,250,.08));
  border: 1px solid var(--border-lit); border-radius: var(--radius);
  animation: rise .4s both;
}
.prediction[hidden] { display: none; }
.pred-label { font-size: .74rem; color: var(--text-mute); text-transform: uppercase; letter-spacing: .07em; }
.pred-value {
  font-size: 1.9rem; font-weight: 700; font-family: var(--mono);
  color: var(--primary); letter-spacing: -.02em; margin: .15rem 0 .9rem;
  word-break: break-word;
}
.proba-row { display: grid; grid-template-columns: minmax(70px,130px) 1fr auto; gap: .6rem; align-items: center; margin-bottom: .3rem; }
.proba-name { font-size: .78rem; color: var(--text-dim); }
.proba-track { background: var(--surface-2); border-radius: 4px; height: 15px; overflow: hidden; }
.proba-bar { height: 100%; background: linear-gradient(90deg, var(--violet), #c4b5fd); animation: grow .6s both; }
.proba-val { font-family: var(--mono); font-size: .74rem; color: var(--text-mute); }

/* ── Footer ───────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border); padding: 1.8rem 0 2.5rem;
  color: var(--text-mute); font-size: .8rem;
}
.footer p { margin: .3rem 0; }
.footer-note { font-size: .74rem; }

@media (max-width: 640px) {
  .wrap { width: min(1120px, 100% - 1.6rem); }
  .step { padding: 1.15rem; }
  .masthead .wrap { gap: .7rem; }
  .pred-value { font-size: 1.45rem; }
  .imp-row { grid-template-columns: minmax(70px,110px) 1fr auto; }
  .badges { width: 100%; }
  /* Exact library versions are desktop detail; the privacy promise is not. */
  #runtime-badge { display: none; }
  .col-grid { grid-template-columns: 1fr; }
  .predict-form { grid-template-columns: 1fr; }
  .config { flex-direction: column; align-items: stretch; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* ── Shared additions used across the portfolio projects ──── */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.pill { display:inline-block; font-size:.68rem; padding:.15rem .5rem; border-radius:999px;
        font-family:var(--mono); letter-spacing:.03em; }
.pill-ok   { background:rgba(74,222,128,.14); color:var(--green); }
.pill-warn { background:rgba(245,180,69,.16); color:var(--amber); }
.pill-bad  { background:rgba(251,113,133,.16); color:var(--red); }
.pill-info { background:rgba(57,214,208,.14); color:var(--primary); }
.muted { color: var(--text-mute); }
.kpi-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(160px,1fr)); gap:.75rem; }
svg.chart { display:block; width:100%; height:auto; overflow:visible; }
svg.chart text { fill: var(--text-dim); font-family: var(--mono); font-size: 10px; }
svg.chart .axis line, svg.chart .axis path { stroke: var(--border); }
svg.chart .grid line { stroke: var(--border); stroke-dasharray: 2 3; }
@media (max-width:640px){ .two-col { grid-template-columns:1fr; } }

/* ── Digit Recognizer ─────────────────────────────────────── */
.pad-layout { display: grid; grid-template-columns: auto 1fr; gap: 1.6rem; align-items: start; }
#pad {
  width: 320px; height: 320px; max-width: 100%;
  background: #000; border: 1px solid var(--border-lit);
  border-radius: var(--radius); cursor: crosshair;
  touch-action: none; display: block;
}
.pad-actions { display: flex; gap: .8rem; align-items: center; margin-top: .7rem; flex-wrap: wrap; }
.pad-actions .hint { margin: 0; }

.result-panel {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.1rem 1.3rem;
}
.big-digit {
  font-family: var(--mono); font-size: 5rem; line-height: 1;
  font-weight: 700; letter-spacing: -.04em; margin: .1rem 0;
}
.conf { font-size: .88rem; font-family: var(--mono); }
.preview {
  width: 112px; height: 112px; image-rendering: pixelated;
  border: 1px solid var(--border-lit); border-radius: 6px;
  background: #000; display: block; margin: .4rem 0 .5rem;
}

.prob-list { display: flex; flex-direction: column; gap: .3rem; }
.prob-row { display: grid; grid-template-columns: 22px 1fr 56px; gap: .7rem; align-items: center; }
.prob-digit { font-family: var(--mono); font-size: .85rem; color: var(--text-dim); text-align: center; }
.prob-track { background: var(--surface-2); border-radius: 4px; height: 16px; overflow: hidden; }
.prob-bar { display: block; height: 100%; background: var(--border-lit); border-radius: 4px; transition: width .12s ease; }
.prob-row.top .prob-bar { background: linear-gradient(90deg, var(--primary-d), var(--primary)); }
.prob-row.top .prob-digit { color: var(--primary); font-weight: 700; }
.prob-val { font-family: var(--mono); font-size: .72rem; color: var(--text-mute); text-align: right; }

.confusions { margin: 0; padding-left: 1.1rem; color: var(--text-dim); font-size: .85rem; }
.confusions li { margin: .25rem 0; font-family: var(--mono); }

@media (max-width: 720px) {
  .pad-layout { grid-template-columns: 1fr; }
  #pad { width: 100%; height: auto; aspect-ratio: 1; }
  .big-digit { font-size: 3.4rem; }
}

/* ── Auto-loaded demo ─────────────────────────────────────── */
/* The dropzone collapses to a single strip once data is loaded: a visitor
   arriving at a working demo should see results, not a large empty box. */
.dropzone.compact {
  display: grid; grid-template-columns: auto 1fr; gap: .1rem 1rem;
  align-items: center; text-align: left; padding: .8rem 1.15rem;
}
.dropzone.compact .dz-icon { grid-row: 1 / 3; font-size: 1.4rem; }
.dropzone.compact .dz-title { margin: 0; font-size: .85rem; }
.dropzone.compact .dz-sub { margin: 0; font-size: .74rem; }

.demo-banner {
  display: flex; align-items: center; gap: .6rem; flex-wrap: wrap;
  background: linear-gradient(135deg, rgba(57,214,208,.10), rgba(167,139,250,.07));
  border: 1px solid var(--border-lit); border-radius: var(--radius);
  padding: .65rem 1rem; margin-bottom: 1.1rem; font-size: .83rem;
  color: var(--text-dim);
}
.demo-banner strong { color: var(--text); font-weight: 600; }
.demo-banner .pill { flex: none; }
.demo-banner button {
  font: inherit; font-size: .78rem; font-weight: 600; cursor: pointer;
  background: none; border: none; color: var(--primary); padding: 0;
  text-decoration: underline; text-underline-offset: 3px;
}
.demo-banner button:hover { color: var(--text); }

.boot-note .demo-hint { color: var(--primary); }
.demo-banner .spacer { flex: 1; min-width: 0; }