/* Doubling Time Calculator — 37degrees brand-aligned styles.
 * All rules scoped under .dt-root to keep the widget self-contained.
 * Dark theme by default; .dt-theme-light overrides surfaces.
 *
 * Brand tokens (from src/styles/global.css):
 *   navy-900 #082540 · navy-950 #04141f · navy-700 #133b56
 *   pink-400 #ff7bac · pink-600 #ec1f6a · text #dde4ed · muted #8ba5bd
 */

.dt-root {
  --dt-navy-900: #082540;
  --dt-navy-950: #04141f;
  --dt-navy-700: #133b56;
  --dt-navy-400: #5d83a1;
  --dt-text: #dde4ed;
  --dt-muted: #8ba5bd;
  --dt-accent: #ff7bac;
  --dt-accent-2: #ec1f6a;
  --dt-green: #34d399;
  --dt-grid: rgba(141, 165, 189, 0.18);
  --dt-radius: 14px;
  --dt-radius-sm: 10px;
  --dt-radius-chip: 999px;
  --dt-mono: "JetBrains Mono", "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;
  --dt-font: "Nunito Sans Variable", "Nunito Sans", system-ui, -apple-system,
             BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  position: relative;
  font-family: var(--dt-font);
  color: var(--dt-text);
  background: linear-gradient(180deg, var(--dt-navy-900) 0%, var(--dt-navy-950) 100%);
  border: 1px solid var(--dt-navy-700);
  border-radius: var(--dt-radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: 0 10px 40px rgba(4, 20, 31, 0.35);
  box-sizing: border-box;
  max-width: 100%;
}

.dt-root *,
.dt-root *::before,
.dt-root *::after { box-sizing: border-box; }

/* ---- Light theme ---------------------------------------------------- */
.dt-root.dt-theme-light {
  --dt-text: #082540;
  --dt-muted: #5d83a1;
  --dt-navy-700: #dde4ed;
  --dt-grid: rgba(8, 37, 64, 0.10);
  background: linear-gradient(180deg, #ffffff 0%, #f1f4f8 100%);
  border-color: #dde4ed;
  box-shadow: 0 6px 24px rgba(8, 37, 64, 0.08);
}
.dt-root.dt-theme-light .dt-select,
.dt-root.dt-theme-light .dt-num { background: #ffffff; border-color: #dde4ed; color: var(--dt-text); }
.dt-root.dt-theme-light .dt-card,
.dt-root.dt-theme-light .dt-result,
.dt-root.dt-theme-light .dt-stat,
.dt-root.dt-theme-light .dt-chart-wrap { background: #ffffff; border-color: #dde4ed; }
.dt-root.dt-theme-light .dt-segmented { background: #f1f4f8; border-color: #dde4ed; }
.dt-root.dt-theme-light .dt-segmented-btn[aria-checked="true"] { background: #fff1f6; border-color: var(--dt-accent); color: var(--dt-accent-2); }

/* ---- Header --------------------------------------------------------- */
.dt-header { display: flex; flex-direction: column; gap: 4px; }
.dt-eyebrow { font-size: 11px; letter-spacing: 3px; font-weight: 800; color: var(--dt-accent); }
.dt-title { font-size: 22px; font-weight: 800; line-height: 1.2; color: var(--dt-text); }
.dt-subtitle { font-size: 14px; color: var(--dt-muted); line-height: 1.45; }

/* ---- Card ----------------------------------------------------------- */
.dt-card {
  background: rgba(8, 37, 64, 0.4);
  border: 1px solid var(--dt-navy-700);
  border-radius: var(--dt-radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ---- Labels --------------------------------------------------------- */
.dt-label { font-size: 11px; letter-spacing: 2px; font-weight: 800; color: var(--dt-muted); text-transform: uppercase; }

/* ---- Segmented ------------------------------------------------------ */
.dt-segmented {
  display: inline-flex;
  background: rgba(4, 20, 31, 0.55);
  border: 1px solid var(--dt-navy-700);
  border-radius: var(--dt-radius-chip);
  padding: 3px;
  gap: 2px;
  width: max-content;
  max-width: 100%;
  flex-wrap: wrap;
}
.dt-segmented-btn {
  font-family: inherit;
  font-size: 12px;
  font-weight: 700;
  color: var(--dt-muted);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--dt-radius-chip);
  padding: 6px 14px;
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease, border-color 120ms ease;
}
.dt-segmented-btn:hover { color: var(--dt-text); }
.dt-segmented-btn[aria-checked="true"] { background: rgba(255, 123, 172, 0.14); border-color: var(--dt-accent); color: var(--dt-accent); }
.dt-segmented-sm .dt-segmented-btn { font-size: 11px; padding: 5px 11px; }

/* ---- Panes ---------------------------------------------------------- */
.dt-pane { display: flex; flex-direction: column; gap: 14px; }
.dt-pane[hidden] { display: none; }

/* ---- Fields --------------------------------------------------------- */
.dt-field-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 14px; }
.dt-field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.dt-inline { display: flex; align-items: center; gap: 8px; }
.dt-inline .dt-num { flex: 1 1 auto; }
.dt-inline .dt-select { flex: 0 0 auto; width: auto; min-width: 96px; }

/* ---- Inputs --------------------------------------------------------- */
.dt-num {
  width: 100%;
  font-family: var(--dt-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--dt-text);
  background: rgba(4, 20, 31, 0.55);
  border: 1px solid var(--dt-navy-700);
  border-radius: var(--dt-radius-sm);
  padding: 9px 12px;
  outline: none;
  transition: border-color 120ms ease, box-shadow 120ms ease;
}
.dt-num:focus { border-color: var(--dt-accent); box-shadow: 0 0 0 3px rgba(255, 123, 172, 0.18); }
.dt-num::placeholder { color: var(--dt-muted); opacity: 0.7; }

.dt-select {
  width: 100%;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  color: var(--dt-text);
  background: rgba(4, 20, 31, 0.55);
  border: 1px solid var(--dt-navy-700);
  border-radius: var(--dt-radius-sm);
  padding: 9px 30px 9px 12px;
  outline: none;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'><path fill='%238ba5bd' d='M6 8.5 1.5 4h9z'/></svg>");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 12px 12px;
}
.dt-select:focus { border-color: var(--dt-accent); box-shadow: 0 0 0 3px rgba(255, 123, 172, 0.18); }

/* ---- Time course table --------------------------------------------- */
.dt-course-units { gap: 14px; align-items: flex-end; flex-wrap: wrap; }
.dt-course-units .dt-field { flex: 1 1 150px; }
.dt-course-head,
.dt-course-row { display: grid; grid-template-columns: 1fr 1fr 34px; gap: 8px; align-items: center; }
.dt-course-head span {
  font-size: 10px; letter-spacing: 1.5px; font-weight: 800; color: var(--dt-muted); text-transform: uppercase;
}
.dt-course-rows { display: flex; flex-direction: column; gap: 8px; }
.dt-row-remove {
  font-family: inherit; font-size: 16px; font-weight: 800; line-height: 1;
  color: var(--dt-muted);
  background: rgba(141, 165, 189, 0.10);
  border: 1px solid var(--dt-navy-700);
  border-radius: 8px;
  height: 34px; cursor: pointer;
  transition: background 120ms ease, color 120ms ease, border-color 120ms ease;
}
.dt-row-remove:hover { background: rgba(236, 31, 106, 0.16); border-color: var(--dt-accent-2); color: var(--dt-accent-2); }

/* ---- Actions -------------------------------------------------------- */
.dt-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.dt-primary {
  font-family: inherit; font-size: 14px; font-weight: 800; letter-spacing: 0.3px;
  color: #ffffff; background: var(--dt-accent); border: 1px solid var(--dt-accent);
  border-radius: var(--dt-radius-sm); padding: 10px 24px; cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease, transform 120ms ease;
}
.dt-primary:hover { background: var(--dt-accent-2); border-color: var(--dt-accent-2); }
.dt-primary:active { transform: translateY(1px); }
.dt-secondary {
  font-family: inherit; font-size: 13px; font-weight: 700; color: var(--dt-text);
  background: rgba(141, 165, 189, 0.10); border: 1px solid var(--dt-navy-700);
  border-radius: var(--dt-radius-sm); padding: 8px 16px; cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease, color 120ms ease;
}
.dt-secondary:hover { background: rgba(255, 123, 172, 0.12); border-color: var(--dt-accent); color: var(--dt-accent); }
.dt-secondary.dt-small { font-size: 12px; padding: 6px 12px; width: max-content; }
.dt-link {
  font-family: inherit; font-size: 13px; font-weight: 700; color: var(--dt-accent);
  background: transparent; border: none; border-bottom: 1px dashed var(--dt-accent);
  padding: 0 0 1px; cursor: pointer;
}
.dt-link:hover { color: var(--dt-accent-2); border-bottom-color: var(--dt-accent-2); }

/* ---- Status --------------------------------------------------------- */
.dt-status { font-size: 13px; line-height: 1.4; }
.dt-status:empty { display: none; }
.dt-status-ok { color: var(--dt-text); padding: 10px 14px; background: rgba(52, 211, 153, 0.10); border: 1px solid rgba(52, 211, 153, 0.35); border-radius: var(--dt-radius-sm); }
.dt-status-error { color: #ffffff; padding: 10px 14px; background: rgba(236, 31, 106, 0.18); border: 1px solid var(--dt-accent-2); border-radius: var(--dt-radius-sm); }
.dt-root.dt-theme-light .dt-status-ok { color: #0a5; }
.dt-root.dt-theme-light .dt-status-error { color: var(--dt-accent-2); }

/* ---- Result --------------------------------------------------------- */
.dt-result {
  background: rgba(8, 37, 64, 0.4);
  border: 1px solid var(--dt-navy-700);
  border-radius: var(--dt-radius);
  padding: 18px;
  display: flex; flex-direction: column; gap: 14px;
}
.dt-result[hidden] { display: none; }
.dt-result-title { font-size: 11px; letter-spacing: 2px; font-weight: 800; color: var(--dt-accent); text-transform: uppercase; }

.dt-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; }
.dt-stat {
  background: rgba(4, 20, 31, 0.45);
  border: 1px solid var(--dt-navy-700);
  border-radius: var(--dt-radius-sm);
  padding: 12px 14px;
  display: flex; flex-direction: column; gap: 3px;
}
.dt-stat-label { font-size: 10px; letter-spacing: 1.5px; font-weight: 800; color: var(--dt-muted); text-transform: uppercase; }
.dt-stat-value { font-size: 18px; font-weight: 800; color: var(--dt-text); font-variant-numeric: tabular-nums; line-height: 1.2; }
.dt-stat-hint { font-size: 11px; color: var(--dt-muted); }

.dt-interpret { font-size: 13.5px; line-height: 1.5; color: var(--dt-muted); }
.dt-interpret:empty { display: none; }

/* ---- Chart ---------------------------------------------------------- */
.dt-chart-wrap {
  background: rgba(4, 20, 31, 0.45);
  border: 1px solid var(--dt-navy-700);
  border-radius: var(--dt-radius-sm);
  padding: 12px;
}
.dt-chart-wrap[hidden] { display: none; }
.dt-chart { width: 100%; height: auto; display: block; }

.dt-result-actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* ---- Footer --------------------------------------------------------- */
.dt-footer { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; font-size: 12px; color: var(--dt-muted); }
.dt-footer a { color: var(--dt-text); text-decoration: none; font-weight: 700; border-bottom: 1px solid transparent; transition: color 120ms ease, border-color 120ms ease; }
.dt-footer a:hover { color: var(--dt-accent); border-bottom-color: var(--dt-accent); }
.dt-footer-sep { opacity: 0.5; }
.dt-footer-brand { color: #ff7bac !important; font-weight: 700; }
.dt-footer-brand:hover { color: #ec1f6a !important; text-decoration: underline; }

/* ---- Fatal ---------------------------------------------------------- */
.dt-fatal { font-family: var(--dt-font, system-ui, sans-serif); padding: 16px; border-radius: 10px; background: rgba(236, 31, 106, 0.12); border: 1px solid #ec1f6a; color: #ffffff; }

/* ---- Rail ----------------------------------------------------------- */
.dt-rail { display: flex; flex-direction: column; gap: 16px; }

/* ---- Responsive ----------------------------------------------------- */
@media (max-width: 640px) {
  .dt-root { padding: 18px; gap: 14px; }
  .dt-card { padding: 14px; }
  .dt-title { font-size: 19px; }
  .dt-stats { grid-template-columns: repeat(2, 1fr); }
  .dt-field-grid { grid-template-columns: 1fr; }
}

/* ===================================================================
   Expand / fullscreen (in-page overlay; no Fullscreen API)
   =================================================================== */
.dt-expand-icon {
  position: absolute;
  top: 14px; right: 14px;
  z-index: 50;
  width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255, 123, 172, 0.10);
  color: #ec1f6a;
  border: 1px solid rgba(255, 123, 172, 0.30);
  border-radius: 10px;
  cursor: pointer; padding: 0; font-family: inherit;
  transition: background 0.12s ease, border-color 0.12s ease, transform 0.12s ease;
}
.dt-expand-icon:hover { background: rgba(255, 123, 172, 0.22); border-color: rgba(255, 123, 172, 0.55); transform: scale(1.05); }
.dt-expand-icon-label { display: none; }

.dt-brand-mark { display: none; }

html.dt-html-locked, body.dt-body-locked { overflow: hidden !important; height: 100vh !important; }

.dt-root.dt-is-expanded {
  position: fixed; inset: 0; z-index: 99990; margin: 0;
  border: none; border-radius: 0; box-shadow: none;
  background: #ffffff; color: #082540;
  /* force light palette so it's readable on white regardless of embed theme */
  --dt-text: #082540; --dt-muted: #5d83a1; --dt-navy-700: #dde4ed; --dt-grid: rgba(8,37,64,0.10);
  display: grid !important;
  grid-template-columns: 380px minmax(0, 1fr);
  grid-template-rows: auto minmax(0, 1fr) auto;
  grid-template-areas:
    "brand  result"
    "rail   result"
    "footer footer";
  gap: 0; padding: 0; height: 100vh; overflow: hidden;
}
.dt-root.dt-is-expanded .dt-header { display: none; }
.dt-root.dt-is-expanded .dt-rail {
  grid-area: rail; overflow-y: auto; overflow-x: hidden;
  padding: 18px; border-right: 1px solid #dde4ed; background: #f1f4f8;
  min-height: 0; height: 100%; align-content: start;
}
.dt-root.dt-is-expanded .dt-card,
.dt-root.dt-is-expanded .dt-result,
.dt-root.dt-is-expanded .dt-stat,
.dt-root.dt-is-expanded .dt-chart-wrap { background: #ffffff; border-color: #dde4ed; }
.dt-root.dt-is-expanded .dt-num,
.dt-root.dt-is-expanded .dt-select { background: #f7f9fc; border-color: #dde4ed; color: #082540; }
.dt-root.dt-is-expanded .dt-segmented { background: #f1f4f8; border-color: #dde4ed; }
.dt-root.dt-is-expanded .dt-result {
  grid-area: result; min-height: 0; overflow-y: auto; background: #ffffff; padding: 18px;
}
.dt-root.dt-is-expanded .dt-result[hidden] { display: block !important; visibility: hidden; pointer-events: none; }
.dt-root.dt-is-expanded .dt-expand-icon {
  position: fixed; top: 18px; right: 22px; z-index: 99991;
  width: auto; gap: 8px; padding: 0 14px; font-weight: 800; font-size: 13px;
  background: rgba(236, 31, 106, 0.08); border-color: rgba(236, 31, 106, 0.35); color: #ec1f6a;
}
.dt-root.dt-is-expanded .dt-expand-icon-label { display: inline-block; }

/* Brand bar (top-left, fullscreen only) */
.dt-root.dt-is-expanded .dt-brand-mark {
  grid-area: brand; display: flex; align-items: center; gap: 10px;
  text-decoration: none; color: #ffffff; background: #082540;
  font-family: var(--dt-font); font-weight: 800; font-size: 15px; line-height: 1;
  padding: 14px 20px; border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.dt-root.dt-is-expanded .dt-brand-mark svg { height: 28px; width: 28px; display: block; flex-shrink: 0; }
.dt-root.dt-is-expanded .dt-brand-mark .dt-brand-sep { color: #ff7bac; margin: 0 2px; }
.dt-root.dt-is-expanded .dt-brand-mark .dt-tool-name { color: #ff7bac; letter-spacing: 0.4px; }
.dt-root.dt-is-expanded .dt-brand-mark:hover { background: #04141f; }

.dt-root.dt-is-expanded .dt-footer {
  grid-area: footer; background: #082540; padding: 12px 24px; justify-content: center; margin: 0;
}
.dt-root.dt-is-expanded .dt-footer,
.dt-root.dt-is-expanded .dt-footer span { color: #ffffff; }
.dt-root.dt-is-expanded .dt-footer a { color: #ff7bac; }
.dt-root.dt-is-expanded .dt-footer-sep { color: #ff7bac; opacity: 0.6; }

@media (max-width: 960px) {
  .dt-root.dt-is-expanded {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto minmax(0, 1fr) auto;
    grid-template-areas: "brand" "rail" "result" "footer";
  }
  .dt-root.dt-is-expanded .dt-rail { border-right: none; border-bottom: 1px solid #e4ecf2; max-height: 42vh; }
  .dt-root.dt-is-expanded .dt-brand-mark .dt-brand-sep,
  .dt-root.dt-is-expanded .dt-brand-mark .dt-tool-name { display: none; }
}