/* ============================================================
   SmartCart — Customer segment finder
   Palette "Ledger": deep teal-navy ground, warm paper text,
   ember (assigned) + tide (confidence) accents, flare for alerts.
   ============================================================ */

:root {
  --abyss:      #152029;   /* app ground            */
  --slab:       #1b2a35;   /* panels / cards        */
  --slab-raised:#233846;   /* inputs, raised chrome */
  --line:       #33505f;   /* hairlines / borders   */
  --chalk:      #e8e4d9;   /* primary text          */
  --haze:       #8297a3;   /* labels, secondary     */
  --ember:      #f2704b;   /* primary accent        */
  --ember-soft: #f2704b26;
  --tide:       #5cc2b0;   /* secondary accent      */
  --flare:      #e9b949;   /* alerts / loading      */
  --danger:     #ef6461;

  --step--1: 0.78rem;
  --step-0:  0.9rem;
  --step-1:  1.05rem;
  --step-2:  1.4rem;
  --step-3:  2rem;
  --step-4:  clamp(2.4rem, 1.6rem + 3vw, 3.6rem);

  --ease: cubic-bezier(.22, 1, .36, 1);
  --radius: 14px;

  --sans: "Archivo", "Segoe UI", system-ui, sans-serif;
  --display: "Fraunces", Georgia, serif;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  background: var(--abyss);
  color: var(--chalk);
  font-family: var(--sans);
  font-size: var(--step-0);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* subtle film grain + radial glow for depth */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(900px 500px at 82% -8%, #23485314, transparent 70%),
    radial-gradient(700px 600px at 0% 100%, #f2704b0f, transparent 70%);
}
.grain::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.app {
  position: relative;
  z-index: 1;
  max-width: 1400px;
  margin: 0 auto;
  padding: clamp(1.4rem, 1rem + 2vw, 3.5rem) clamp(1.1rem, .6rem + 2vw, 3rem) 5rem;
}

/* ---------- masthead ---------- */
.masthead { max-width: 46rem; margin-bottom: clamp(2rem, 1rem + 3vw, 3.5rem); }

.mark {
  font-family: var(--display);
  font-weight: 600;
  font-size: var(--step-1);
  letter-spacing: .01em;
  color: var(--chalk);
}
.mark-dot { color: var(--ember); }

.masthead h1 {
  font-family: var(--display);
  font-weight: 600;
  font-size: var(--step-4);
  line-height: 1.05;
  letter-spacing: -.015em;
  margin: .5rem 0 .75rem;
}
.lede { color: var(--haze); font-size: var(--step-1); max-width: 40rem; }

/* ---------- workbench layout ---------- */
.workbench {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 1rem + 2vw, 3rem);
  align-items: start;
}

/* ---------- form ---------- */
.form-col { display: flex; flex-direction: column; gap: 1.1rem; }

.group {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #1e2e3a, var(--slab));
  padding: 1.4rem 1.4rem 1.5rem;
}
.group legend {
  font-family: var(--display);
  font-size: var(--step-2);
  font-weight: 500;
  letter-spacing: -.01em;
  display: flex;
  align-items: baseline;
  gap: .6rem;
  padding: 0 .3rem;
}
.group-index {
  font-family: var(--sans);
  font-size: var(--step--1);
  font-variant-numeric: tabular-nums;
  color: var(--ember);
  border: 1px solid var(--ember);
  border-radius: 5px;
  padding: .1rem .35rem;
  letter-spacing: .04em;
}
.legend-note { font-family: var(--sans); font-size: var(--step--1); color: var(--haze); font-weight: 400; }

.grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1rem .9rem;
  margin-top: 1.1rem;
}
.grid.tight { gap: .8rem; }
.span-2 { grid-column: span 2; }
.span-3 { grid-column: span 3; }

.field { display: flex; flex-direction: column; gap: .4rem; min-width: 0; }
.field-label {
  font-size: var(--step--1);
  color: var(--haze);
  letter-spacing: .01em;
}

/* text / number inputs */
input[type="number"],
input[type="date"] {
  font: inherit;
  color: var(--chalk);
  background: var(--slab-raised);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: .6rem .7rem;
  width: 100%;
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease), background .18s var(--ease);
  font-variant-numeric: tabular-nums;
}
input[type="number"]:focus,
input[type="date"]:focus,
select:focus {
  outline: none;
  border-color: var(--ember);
  box-shadow: 0 0 0 3px var(--ember-soft);
  background: #26404f;
}
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
input[type="number"] { -moz-appearance: textfield; }

input[type="date"]::-webkit-calendar-picker-indicator {
  filter: invert(.7) sepia(.4) hue-rotate(130deg);
  cursor: pointer;
}

/* adornment ($ prefix) */
.input-adorn { position: relative; display: flex; align-items: center; }
.input-adorn .adorn {
  position: absolute;
  left: .7rem;
  color: var(--haze);
  font-size: var(--step--1);
  pointer-events: none;
}
.input-adorn input { padding-left: 1.5rem; }

/* custom select */
.select-wrap { position: relative; }
.select-wrap::after {
  content: "";
  position: absolute;
  right: .8rem;
  top: 50%;
  width: .5rem;
  height: .5rem;
  border-right: 2px solid var(--haze);
  border-bottom: 2px solid var(--haze);
  transform: translateY(-65%) rotate(45deg);
  pointer-events: none;
  transition: border-color .18s var(--ease);
}
.select-wrap:focus-within::after { border-color: var(--ember); }
select {
  font: inherit;
  color: var(--chalk);
  background: var(--slab-raised);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: .6rem 2rem .6rem .7rem;
  width: 100%;
  appearance: none;
  cursor: pointer;
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease);
}
select option { background: var(--slab); color: var(--chalk); }

/* segmented control */
.segmented {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: 3px;
  background: #121c24;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 3px;
}
.segmented label {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: .5rem 0;
  border-radius: 7px;
  cursor: pointer;
  font-size: var(--step-0);
  font-variant-numeric: tabular-nums;
  color: var(--haze);
  transition: color .18s var(--ease), background .18s var(--ease), box-shadow .18s var(--ease), transform .12s var(--ease);
  user-select: none;
}
.segmented input { position: absolute; opacity: 0; pointer-events: none; }
.segmented label:hover { color: var(--chalk); }
.segmented label:active { transform: scale(.96); }
.segmented label:has(input:checked) {
  background: var(--slab-raised);
  color: var(--ember);
  font-weight: 600;
  box-shadow: 0 1px 3px #0006, inset 0 0 0 1px #ffffff0f;
}
.segmented label:has(input:focus-visible) { box-shadow: 0 0 0 3px var(--ember-soft); }

/* stepper */
.stepper { display: flex; align-items: stretch; }
.stepper input {
  border-radius: 0;
  text-align: center;
  border-left: none;
  border-right: none;
}
.stepper button {
  font: inherit;
  font-size: var(--step-1);
  line-height: 1;
  color: var(--haze);
  background: var(--slab-raised);
  border: 1px solid var(--line);
  width: 2.3rem;
  cursor: pointer;
  transition: color .15s var(--ease), background .15s var(--ease);
}
.stepper button:first-child { border-radius: 9px 0 0 9px; }
.stepper button:last-child { border-radius: 0 9px 9px 0; }
.stepper button:hover { color: var(--ember); background: #26404f; }
.stepper button:active { background: var(--ember); color: #1b1005; }

/* actions */
.form-actions { display: flex; gap: .8rem; margin-top: .4rem; }
.run-btn {
  position: relative;
  font: inherit;
  font-weight: 600;
  font-size: var(--step-1);
  color: #1b1005;
  background: var(--ember);
  border: none;
  border-radius: 10px;
  padding: .85rem 1.8rem;
  cursor: pointer;
  overflow: hidden;
  transition: transform .14s var(--ease), box-shadow .2s var(--ease), filter .2s var(--ease);
  box-shadow: 0 8px 24px -12px var(--ember);
}
.run-btn:hover { transform: translateY(-1px); filter: brightness(1.06); box-shadow: 0 14px 30px -12px var(--ember); }
.run-btn:active { transform: translateY(0); }
.run-btn:disabled { cursor: progress; filter: saturate(.6) brightness(.9); }
.run-spinner {
  display: none;
  position: absolute;
  inset: 0;
  margin: auto;
  width: 1.1rem; height: 1.1rem;
  border: 2px solid #1b100544;
  border-top-color: #1b1005;
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
.run-btn[data-loading="true"] .run-label { visibility: hidden; }
.run-btn[data-loading="true"] .run-spinner { display: block; }
@keyframes spin { to { transform: rotate(360deg); } }

.ghost-btn {
  font: inherit;
  color: var(--haze);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: .85rem 1.3rem;
  cursor: pointer;
  transition: color .15s var(--ease), border-color .15s var(--ease);
}
.ghost-btn:hover { color: var(--chalk); border-color: var(--haze); }

/* ---------- result column ---------- */
.result-col { position: sticky; top: 1.5rem; display: flex; flex-direction: column; gap: .8rem; }

.result-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 80% at 50% -10%, #22414f, transparent 60%),
    var(--slab);
  padding: 1.5rem 1.5rem 1.8rem;
  overflow: hidden;
}

.viz-frame { position: relative; }
#segment-map { width: 100%; height: auto; display: block; overflow: visible; }

.viz-hint {
  position: absolute;
  left: 50%; bottom: .2rem;
  transform: translateX(-50%);
  font-size: var(--step--1);
  color: var(--haze);
  text-align: center;
  width: 90%;
  transition: opacity .3s var(--ease);
}
.result-card[data-state="done"] .viz-hint,
.result-card[data-state="loading"] .viz-hint,
.result-card[data-state="waking"] .viz-hint { opacity: 0; }

/* SVG element styling */
.map-axis { stroke: var(--line); stroke-width: 1; }
.map-axis-label { fill: var(--haze); font-size: 9px; font-family: var(--sans); letter-spacing: .06em; }
.anchor-ring { fill: #ffffff08; stroke: var(--line); stroke-width: 1; transition: r .5s var(--ease), stroke .4s var(--ease); }
.anchor-core { fill: var(--haze); transition: fill .4s var(--ease), r .4s var(--ease); }
.anchor-name { fill: var(--haze); font-size: 10px; font-family: var(--sans); font-weight: 500; transition: fill .4s var(--ease); }
.anchor-pct  { fill: var(--haze); font-size: 9px; font-family: var(--sans); font-variant-numeric: tabular-nums; opacity: 0; transition: opacity .4s var(--ease); }
.tether { stroke: var(--tide); stroke-linecap: round; opacity: 0; transition: opacity .5s var(--ease), stroke-width .5s var(--ease); }

.anchor.is-assigned .anchor-ring { stroke: var(--ember); }
.anchor.is-assigned .anchor-core { fill: var(--ember); }
.anchor.is-assigned .anchor-name { fill: var(--chalk); font-weight: 600; }
.result-card[data-state="done"] .anchor-pct { opacity: 1; }

#marker { opacity: 0; transition: opacity .4s var(--ease), transform .9s var(--ease); }
.result-card[data-state="done"] #marker { opacity: 1; }
.marker-halo { fill: var(--ember-soft); }
.marker-core { fill: var(--ember); stroke: var(--chalk); stroke-width: 1.5; }

.result-card[data-state="loading"] #segment-map,
.result-card[data-state="waking"] #segment-map { animation: breathe 1.4s var(--ease) infinite; }
@keyframes breathe { 50% { opacity: .45; } }

/* verdict */
.verdict { margin-top: 1.2rem; }
.verdict-kicker {
  font-size: var(--step--1);
  color: var(--tide);
  letter-spacing: .08em;
  margin-bottom: .3rem;
}
.verdict-name {
  font-family: var(--display);
  font-weight: 600;
  font-size: var(--step-3);
  line-height: 1.1;
  letter-spacing: -.015em;
  min-height: 1.1em;
}
.verdict-desc { color: var(--haze); margin-top: .5rem; font-size: var(--step-0); }

.result-card[data-state="idle"] .verdict-kicker,
.result-card[data-state="idle"] .verdict-desc,
.result-card[data-state="loading"] .verdict-desc { opacity: .4; }

/* reveal animation for verdict text */
.result-card[data-state="done"] .verdict-kicker { animation: rise .5s var(--ease) both; }
.result-card[data-state="done"] .verdict-name   { animation: rise .5s var(--ease) .06s both; }
.result-card[data-state="done"] .verdict-desc   { animation: rise .5s var(--ease) .12s both; }
.result-card[data-state="done"] .drivers        { animation: rise .5s var(--ease) .18s both; }
.result-card[data-state="done"] .spread         { animation: rise .5s var(--ease) .24s both; }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } }

/* why this customer -> this segment */
.drivers {
  margin-top: 1.2rem;
  padding: .9rem 1rem;
  background: #ffffff07;
  border: 1px solid var(--line);
  border-radius: 10px;
}
.drivers-title {
  font-size: var(--step--1);
  color: var(--tide);
  letter-spacing: .04em;
  margin-bottom: .6rem;
}
.drivers-list { list-style: none; display: flex; flex-direction: column; gap: .5rem; }
.drivers-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  font-size: var(--step-0);
}
.driver-feat { color: var(--haze); }
.driver-cmp { font-variant-numeric: tabular-nums; color: var(--haze); text-align: right; }
.driver-cmp strong { color: var(--chalk); font-weight: 600; }

/* collapsed full profile */
.details { margin-top: 1rem; font-size: var(--step--1); }
.details summary {
  cursor: pointer;
  color: var(--haze);
  padding: .4rem 0;
  list-style-position: inside;
  transition: color .15s var(--ease);
}
.details summary:hover { color: var(--chalk); }
.details[open] summary { color: var(--chalk); margin-bottom: .3rem; }
.details-table { width: 100%; border-collapse: collapse; }
.details-table td {
  padding: .35rem .2rem;
  border-bottom: 1px solid var(--line);
  color: var(--haze);
}
.details-table td:last-child { text-align: right; color: var(--chalk); font-variant-numeric: tabular-nums; }
.details-table tr:last-child td { border-bottom: none; }

/* confidence spread */
.spread { margin-top: 1.3rem; display: none; flex-direction: column; gap: .55rem; }
.result-card[data-state="done"] .spread { display: flex; }
.spread-row { display: grid; grid-template-columns: 1fr auto; gap: .3rem .8rem; align-items: center; }
.spread-name { font-size: var(--step--1); color: var(--haze); }
.spread-row.is-assigned .spread-name { color: var(--chalk); }
.spread-pct { font-size: var(--step--1); font-variant-numeric: tabular-nums; color: var(--haze); }
.spread-row.is-assigned .spread-pct { color: var(--ember); }
.spread-track {
  grid-column: 1 / -1;
  height: 4px;
  background: var(--slab-raised);
  border-radius: 3px;
  overflow: hidden;
}
.spread-fill {
  height: 100%;
  width: 0;
  background: var(--tide);
  border-radius: 3px;
  transition: width .7s var(--ease);
}
.spread-row.is-assigned .spread-fill { background: var(--ember); }

.provenance {
  margin-top: 1.1rem;
  padding-top: .9rem;
  border-top: 1px solid var(--line);
  font-size: var(--step--1);
  line-height: 1.5;
  color: var(--haze);
}
.result-card[data-state="done"] .provenance { animation: rise .5s var(--ease) .24s both; }

/* notice (errors / waking) */
.notice {
  display: none;
  margin-top: 1.2rem;
  padding: .85rem 1rem;
  border-radius: 10px;
  font-size: var(--step-0);
  border: 1px solid;
}
.result-card[data-state="error"] .notice,
.result-card[data-state="waking"] .notice { display: block; }
.result-card[data-state="error"] .notice { border-color: #ef646155; background: #ef64611a; color: #f2a3a1; }
.result-card[data-state="waking"] .notice { border-color: #e9b94955; background: #e9b9491a; color: var(--flare); }
.notice ul { margin: .4rem 0 0; padding-left: 1.1rem; }
.notice button {
  font: inherit; font-size: var(--step--1); font-weight: 600;
  margin-top: .6rem; padding: .4rem .9rem;
  color: var(--chalk); background: #ffffff14;
  border: 1px solid var(--line); border-radius: 7px; cursor: pointer;
}
.notice button:hover { background: #ffffff22; }

.api-tag { font-size: var(--step--1); color: var(--haze); text-align: right; letter-spacing: .02em; }
.api-tag span { color: var(--tide); }

/* ---------- responsive ---------- */
@media (max-width: 940px) {
  .workbench { grid-template-columns: 1fr; }
  .result-col { position: static; order: -1; }
  .span-2, .span-3 { grid-column: span 3; }
  .grid { grid-template-columns: repeat(6, 1fr); }
}
@media (max-width: 560px) {
  .grid, .grid.tight { grid-template-columns: 1fr 1fr; gap: .8rem; }
  .span-2, .span-3 { grid-column: span 1; }
  .field.span-3[role="group"], .stepper-field { grid-column: span 2; }
  .masthead h1 { font-size: var(--step-3); }
  .form-actions { flex-direction: column; }
  .run-btn, .ghost-btn { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001s !important; transition-duration: .001s !important; }
}