/* =========================================================================
   Sales Copilot — design system
   Références esthétiques : Claude / ChatGPT — neutres chauds, typographie
   éditoriale, hairlines, whitespace généreux, micro-interactions discrètes.
   ========================================================================= */

:root {
  /* Palette claire (par défaut) */
  --bg: #f7f6f2;
  --surface: #ffffff;
  --surface-2: #fbfaf7;
  --ink: #1b1a16;
  --ink-soft: #46443d;
  --muted: #86837a;
  --hairline: rgba(24, 22, 16, 0.10);
  --hairline-strong: rgba(24, 22, 16, 0.16);
  --accent: #c05f38;
  --accent-hover: #a54d2b;
  --accent-soft: rgba(192, 95, 56, 0.10);
  --accent-ink: #ffffff;
  --ok: #3f7d55;
  --ok-soft: rgba(63, 125, 85, 0.12);
  --warn: #b1742a;
  --warn-soft: rgba(177, 116, 42, 0.14);
  --stop: #a23b34;
  --stop-soft: rgba(162, 59, 52, 0.12);
  --shadow: 0 1px 2px rgba(24, 22, 16, 0.04), 0 8px 28px rgba(24, 22, 16, 0.05);
  --shadow-soft: 0 1px 2px rgba(24, 22, 16, 0.04);

  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, "Inter", sans-serif;
  --mono: "SF Mono", "JetBrains Mono", "Cascadia Code", ui-monospace, "Consolas", monospace;

  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 22px;
  --col: 860px;
}

:root[data-theme="dark"] {
  --bg: #1c1b18;
  --surface: #26241f;
  --surface-2: #211f1b;
  --ink: #eeece4;
  --ink-soft: #cbc8bd;
  --muted: #98948a;
  --hairline: rgba(255, 255, 255, 0.10);
  --hairline-strong: rgba(255, 255, 255, 0.17);
  --accent: #db8b67;
  --accent-hover: #e79f7f;
  --accent-soft: rgba(219, 139, 103, 0.14);
  --accent-ink: #23140d;
  --ok: #74b98c;
  --ok-soft: rgba(116, 185, 140, 0.14);
  --warn: #d5a35f;
  --warn-soft: rgba(213, 163, 95, 0.16);
  --stop: #d97a72;
  --stop-soft: rgba(217, 122, 114, 0.16);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.28), 0 12px 34px rgba(0, 0, 0, 0.34);
  --shadow-soft: 0 1px 2px rgba(0, 0, 0, 0.28);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1c1b18;
    --surface: #26241f;
    --surface-2: #211f1b;
    --ink: #eeece4;
    --ink-soft: #cbc8bd;
    --muted: #98948a;
    --hairline: rgba(255, 255, 255, 0.10);
    --hairline-strong: rgba(255, 255, 255, 0.17);
    --accent: #db8b67;
    --accent-hover: #e79f7f;
    --accent-soft: rgba(219, 139, 103, 0.14);
    --accent-ink: #23140d;
    --ok: #74b98c;
    --ok-soft: rgba(116, 185, 140, 0.14);
    --warn: #d5a35f;
    --warn-soft: rgba(213, 163, 95, 0.16);
    --stop: #d97a72;
    --stop-soft: rgba(217, 122, 114, 0.16);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.28), 0 12px 34px rgba(0, 0, 0, 0.34);
    --shadow-soft: 0 1px 2px rgba(0, 0, 0, 0.28);
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--accent-soft); }

/* ------------------------------- top bar -------------------------------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--hairline);
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 9px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.brand-mark {
  font-family: var(--serif);
  font-size: 17px;
}
.brand-sub {
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.topbar-right { display: flex; align-items: center; gap: 14px; }

/* navigation inter-pages (partagée) */
.nav { display: flex; gap: 2px; }
.nav a { font-size: 13px; color: var(--muted); text-decoration: none; padding: 6px 11px; border-radius: 8px; transition: background .14s, color .14s; white-space: nowrap; }
.nav a:hover { background: var(--surface-2); color: var(--ink); }
.nav a.active { color: var(--accent); background: var(--accent-soft); font-weight: 500; }

.status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: var(--muted);
  padding: 5px 11px;
  border: 1px solid var(--hairline);
  border-radius: 999px;
}
.status .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--muted);
  box-shadow: 0 0 0 0 var(--accent-soft);
}
.status.ok .dot { background: var(--ok); }
.status.err .dot { background: var(--stop); }
.status.loading .dot { background: var(--warn); animation: pulse 1.4s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }

.theme-toggle {
  border: 1px solid var(--hairline);
  background: transparent;
  color: var(--ink-soft);
  width: 34px; height: 34px;
  border-radius: 9px;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: border-color .15s, background .15s;
}
.theme-toggle:hover { border-color: var(--hairline-strong); background: var(--surface-2); }
.theme-toggle svg { width: 17px; height: 17px; }

/* ------------------------------- canvas --------------------------------- */
.canvas {
  max-width: var(--col);
  margin: 0 auto;
  padding: 44px 24px 140px;
}

.hero { margin-bottom: 30px; }
.hero h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 34px;
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 0 0 12px;
}
.hero .lede {
  margin: 0;
  max-width: 60ch;
  color: var(--ink-soft);
  font-size: 16px;
}

/* -------------------------------- cards --------------------------------- */
.card {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-soft);
}

.step { margin-top: 26px; }
.step[hidden] { display: none; }

.step-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.step-index {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  border: 1px solid var(--hairline);
  border-radius: 6px;
  padding: 2px 7px;
  letter-spacing: 0.04em;
}
.step-title {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0;
}
.step-note { margin-left: auto; font-size: 12.5px; color: var(--muted); }

/* ------------------------------ composer -------------------------------- */
.composer { padding: 6px; }
.composer textarea {
  width: 100%;
  border: none;
  outline: none;
  resize: vertical;
  min-height: 132px;
  background: transparent;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15.5px;
  line-height: 1.6;
  padding: 16px 16px 4px;
}
.composer textarea::placeholder { color: var(--muted); }
.composer-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px 12px;
  gap: 12px;
}
.composer-hint { font-size: 12.5px; color: var(--muted); display: inline-flex; gap: 7px; align-items: center; }
.mode-pill {
  font-size: 11px;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  padding: 2px 8px;
  color: var(--ink-soft);
}

/* ------------------------------- buttons -------------------------------- */
.btn {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.005em;
  border-radius: 10px;
  padding: 10px 16px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background .15s, border-color .15s, color .15s, transform .06s, opacity .15s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}
.btn:active { transform: translateY(0.5px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--hairline-strong); }
.btn-ghost:hover:not(:disabled) { background: var(--surface-2); border-color: var(--muted); }
.btn-quiet { background: transparent; color: var(--muted); padding: 8px 10px; }
.btn-quiet:hover:not(:disabled) { color: var(--ink); }
.btn .spin { width: 14px; height: 14px; }

/* ------------------------------- fields --------------------------------- */
.fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 20px;
  padding: 20px;
}
.field { display: flex; flex-direction: column; gap: 7px; }
.field.wide { grid-column: 1 / -1; }
.field label {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
}
.input {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  border-radius: var(--r-sm);
  padding: 10px 12px;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 14.5px;
  transition: border-color .15s, box-shadow .15s, background .15s;
}
.input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
  background: var(--surface);
}
input[type="date"].input { font-family: var(--mono); font-size: 13.5px; }
.card-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 4px 20px 20px;
}
.card-actions .grow { flex: 1; }

/* -------------------------------- chips --------------------------------- */
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-size: 13px;
  padding: 7px 13px;
  border-radius: 999px;
  border: 1px solid var(--hairline-strong);
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  transition: all .14s;
  user-select: none;
}
.chip:hover { border-color: var(--muted); }
.chip[aria-pressed="true"] {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 500;
}

/* ------------------------------ segments -------------------------------- */
.seg-list { display: flex; flex-direction: column; padding: 6px; }
.seg {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  border-radius: var(--r-md);
  cursor: pointer;
  transition: background .12s;
}
.seg:hover { background: var(--surface-2); }
.seg-check {
  flex: none;
  width: 20px; height: 20px;
  border-radius: 6px;
  border: 1.5px solid var(--hairline-strong);
  display: grid; place-items: center;
  transition: all .14s;
}
.seg-check svg { width: 12px; height: 12px; opacity: 0; transform: scale(.6); transition: all .14s; color: var(--accent-ink); }
.seg[aria-selected="true"] .seg-check { background: var(--accent); border-color: var(--accent); }
.seg[aria-selected="true"] .seg-check svg { opacity: 1; transform: scale(1); }
.seg-body { min-width: 0; flex: 1; }
.seg-name { font-family: var(--mono); font-size: 12.5px; letter-spacing: -0.01em; color: var(--ink); word-break: break-word; }
.seg-reason { font-size: 12px; color: var(--muted); margin-top: 2px; }
.seg-score {
  flex: none;
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--hairline);
  border-radius: 6px;
  padding: 2px 7px;
}

.seg-search { padding: 10px 14px 4px; }

/* ------------------------------- banner --------------------------------- */
.banner {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 16px;
  border-radius: var(--r-md);
  border: 1px solid var(--hairline);
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 20px;
}
.banner .marker { width: 3px; align-self: stretch; border-radius: 3px; background: var(--muted); flex: none; }
.banner.ok { background: var(--ok-soft); } .banner.ok .marker { background: var(--ok); }
.banner.warn { background: var(--warn-soft); } .banner.warn .marker { background: var(--warn); }
.banner.stop { background: var(--stop-soft); } .banner.stop .marker { background: var(--stop); }
.banner.info { background: var(--accent-soft); } .banner.info .marker { background: var(--accent); }
.banner b { color: var(--ink); font-weight: 600; }

/* ------------------------------- stats ---------------------------------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: var(--r-md);
  overflow: hidden;
  margin-bottom: 22px;
}
.stat { background: var(--surface); padding: 16px 18px; }
.stat .k { font-size: 11px; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; color: var(--muted); }
.stat .v {
  font-family: var(--serif);
  font-size: 27px;
  line-height: 1.15;
  margin-top: 6px;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}
.stat .u { font-size: 13px; color: var(--muted); margin-left: 3px; font-family: var(--sans); }

/* ------------------------------- table ---------------------------------- */
.block-title { font-size: 12px; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; color: var(--muted); margin: 26px 4px 12px; }
.table-wrap { border: 1px solid var(--hairline); border-radius: var(--r-md); overflow: hidden; }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
thead th {
  text-align: right;
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 11px 14px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--hairline);
}
thead th:first-child, tbody td:first-child { text-align: left; }
tbody td { padding: 12px 14px; text-align: right; font-variant-numeric: tabular-nums; border-bottom: 1px solid var(--hairline); }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: var(--surface-2); }
.env-name { font-weight: 500; color: var(--ink); }

/* -------------------------------- chart --------------------------------- */
.chart-card { border: 1px solid var(--hairline); border-radius: var(--r-md); padding: 18px 18px 8px; }
.chart-card svg { display: block; width: 100%; height: auto; }
.chart-axis { fill: var(--muted); font-size: 10.5px; font-family: var(--mono); }
.chart-line { fill: none; stroke: var(--accent); stroke-width: 1.75; }
.chart-dot { fill: var(--accent); }

/* ------------------------------ disclosure ------------------------------ */
details.assump {
  margin-top: 22px;
  border: 1px solid var(--hairline);
  border-radius: var(--r-md);
  overflow: hidden;
}
details.assump summary {
  cursor: pointer;
  list-style: none;
  padding: 13px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-soft);
  display: flex;
  align-items: center;
  gap: 8px;
}
details.assump summary::-webkit-details-marker { display: none; }
details.assump summary .chev { transition: transform .18s; }
details.assump[open] summary .chev { transform: rotate(90deg); }
details.assump .body { padding: 4px 16px 16px; font-size: 13px; color: var(--muted); line-height: 1.7; border-top: 1px solid var(--hairline); }
details.assump .body code { font-family: var(--mono); font-size: 12px; color: var(--ink-soft); background: var(--surface-2); padding: 1px 5px; border-radius: 5px; }

/* --------------------------- advanced params ---------------------------- */
.subtle-actions { display: flex; align-items: center; gap: 8px; margin-top: 14px; }
.cpm-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; padding: 18px; }

/* ------------------------------ utilities ------------------------------- */
.reveal { animation: reveal .34s cubic-bezier(.2, .7, .2, 1) both; }
@keyframes reveal { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.spin { animation: spin .7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.empty { padding: 26px; text-align: center; color: var(--muted); font-size: 13.5px; }
.inline-note { font-size: 12.5px; color: var(--muted); }
.hidden { display: none !important; }

@media (max-width: 680px) {
  .hero h1 { font-size: 27px; }
  .fields { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .canvas { padding: 30px 16px 120px; }
}