/* =====================================================================
   NursingRidge Calculation Lab — shared theme
   Matches the NursingRidge design system: navy + teal + gold on cream.
   ===================================================================== */

:root {
  --nr-navy:        #153A5B;
  --nr-navy-dark:   #1F4E79;
  --nr-teal:        #2D9C9C;
  --nr-teal-dark:   #1F7878;
  --nr-gold:        #C79A3B;
  --nr-gold-soft:   #E8C879;
  --nr-bg:          #F8FAFC;
  --nr-bg-card:     #FFFFFF;
  --nr-sky:         #D9EEF2;
  --nr-text:        #1F2937;
  --nr-text-soft:   #4B5563;
  --nr-text-muted:  #6B7280;
  --nr-border:      #E5E7EB;
  --nr-border-soft: #F1F3F7;
  --nr-success:     #1F8A5A;
  --nr-warn:        #C77A22;
  --nr-danger:      #B23A3A;
  --nr-shadow-sm:   0 1px 2px rgba(21, 58, 91, 0.06);
  --nr-shadow:      0 4px 16px rgba(21, 58, 91, 0.08);
  --nr-shadow-lg:   0 12px 32px rgba(21, 58, 91, 0.12);
  --nr-radius-sm:   8px;
  --nr-radius:      14px;
  --nr-radius-lg:   20px;
  --nr-radius-pill: 999px;
  --nr-font-display: "Fraunces", "Source Serif Pro", Georgia, serif;
  --nr-font-body:    "Inter Tight", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --nr-font-mono:    "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

.calc-lab {
  background: var(--nr-bg);
  color: var(--nr-text);
  font-family: var(--nr-font-body);
  line-height: 1.6;
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
}

.calc-lab * { box-sizing: border-box; }

/* ---------- Hero ---------- */
.cl-hero {
  background: linear-gradient(135deg, var(--nr-navy) 0%, var(--nr-navy-dark) 55%, var(--nr-teal-dark) 100%);
  color: #fff;
  padding: clamp(2.5rem, 6vw, 4.5rem) clamp(1.25rem, 5vw, 4rem);
  position: relative;
  overflow: hidden;
}
.cl-hero::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(circle at 85% 20%, rgba(199, 154, 59, 0.15), transparent 45%);
  pointer-events: none;
}
.cl-hero-inner { max-width: 1180px; margin: 0 auto; position: relative; z-index: 1; }
.cl-eyebrow {
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--nr-teal);
  margin-bottom: 0.75rem;
}
.cl-hero .cl-eyebrow { color: #7FD6D6; }
.cl-hero h1 {
  font-family: var(--nr-font-display);
  font-weight: 700;
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}
.cl-hero p.cl-sub {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.85);
  max-width: 720px;
  margin: 0 0 1.25rem;
}
.cl-hero .cl-pillrow {
  display: flex; flex-wrap: wrap; gap: 0.5rem;
}
.cl-pill {
  display: inline-flex; align-items: center; gap: 0.4rem;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #fff;
  padding: 0.4rem 0.85rem;
  border-radius: var(--nr-radius-pill);
  font-size: 0.82rem;
  font-weight: 600;
  backdrop-filter: blur(8px);
}
.cl-pill.cl-pill-gold {
  background: linear-gradient(135deg, var(--nr-gold) 0%, #B9842D 100%);
  border-color: transparent;
}
.cl-pill.cl-pill-danger {
  background: linear-gradient(135deg, var(--nr-danger) 0%, #8C2828 100%);
  border-color: transparent;
}

/* ---------- Section ---------- */
.cl-section {
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(2.5rem, 5vw, 4.5rem) clamp(1.25rem, 4vw, 2.5rem);
}
.cl-section-header {
  text-align: center;
  margin-bottom: 2.5rem;
}
.cl-section-header .cl-eyebrow {
  display: inline-block;
}
.cl-section-header h2 {
  font-family: var(--nr-font-display);
  font-weight: 700;
  font-size: clamp(1.6rem, 3.2vw, 2.4rem);
  letter-spacing: -0.02em;
  color: var(--nr-navy);
  margin: 0 0 0.75rem;
  line-height: 1.15;
}
.cl-section-header p.cl-section-sub {
  color: var(--nr-text-soft);
  font-size: 1rem;
  max-width: 720px;
  margin: 0 auto;
}

/* ---------- Pill tabs (matches NursingRidge style) ---------- */
.cl-tabs {
  background: #fff;
  border: 1px solid var(--nr-border);
  border-radius: var(--nr-radius-pill);
  padding: 0.5rem;
  display: inline-flex;
  gap: 0.25rem;
  box-shadow: var(--nr-shadow-sm);
  margin: 0 auto 2rem;
}
.cl-tabs-wrap { display: flex; justify-content: center; }
.cl-tab {
  background: transparent;
  border: 0;
  color: var(--nr-text-soft);
  padding: 0.6rem 1.1rem;
  border-radius: var(--nr-radius-pill);
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex; align-items: center; gap: 0.4rem;
  transition: background 0.18s ease, color 0.18s ease, transform 0.18s ease;
}
.cl-tab:hover { color: var(--nr-navy); }
.cl-tab.is-active {
  background: var(--nr-navy);
  color: #fff;
  box-shadow: 0 4px 12px rgba(21, 58, 91, 0.18);
}
.cl-tab .cl-tab-icon { font-size: 1.05rem; }
.cl-tab .cl-future {
  background: #F3F4F6;
  color: var(--nr-text-muted);
  font-size: 0.72rem;
  padding: 0.18rem 0.55rem;
  border-radius: var(--nr-radius-pill);
  font-weight: 600;
  margin-left: 0.35rem;
}

/* ---------- Two-column feature block (matches NursingRidge home pattern) ---------- */
.cl-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: start;
}
@media (max-width: 880px) { .cl-feature { grid-template-columns: 1fr; } }

.cl-feature-frame {
  background: linear-gradient(160deg, #214E37 0%, var(--nr-navy) 100%);
  border-radius: var(--nr-radius-lg);
  padding: 1.4rem;
  box-shadow: var(--nr-shadow-lg);
}
.cl-feature-frame--navy   { background: linear-gradient(160deg, #1F4E79 0%, #0F2742 100%); }
.cl-feature-frame--teal   { background: linear-gradient(160deg, var(--nr-teal-dark) 0%, var(--nr-navy) 100%); }
.cl-feature-frame--gold   { background: linear-gradient(160deg, #B9842D 0%, var(--nr-navy) 100%); }
.cl-feature-frame--ember  { background: linear-gradient(160deg, #5E2424 0%, var(--nr-navy) 100%); }

.cl-feature-card {
  background: #fff;
  border-radius: var(--nr-radius);
  padding: 1.4rem 1.5rem;
  color: var(--nr-text);
}
.cl-feature-card h3 {
  font-family: var(--nr-font-display);
  font-weight: 700;
  font-size: 1.18rem;
  letter-spacing: -0.01em;
  margin: 0 0 1rem;
  color: var(--nr-navy);
}

.cl-feature-side .cl-eyebrow.cl-numbered {
  color: var(--nr-teal);
}
.cl-feature-side h3 {
  font-family: var(--nr-font-display);
  font-weight: 700;
  font-size: clamp(1.45rem, 2.4vw, 2rem);
  letter-spacing: -0.02em;
  color: var(--nr-navy);
  margin: 0 0 1rem;
  line-height: 1.18;
}
.cl-feature-side p.cl-feature-desc {
  color: var(--nr-text-soft);
  margin: 0 0 1.25rem;
}
.cl-feature-list {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  display: flex; flex-direction: column; gap: 0.65rem;
}
.cl-feature-list li {
  display: flex; align-items: flex-start; gap: 0.7rem;
  font-size: 0.96rem;
}
.cl-feature-list li .cl-feature-emoji {
  flex-shrink: 0;
  width: 1.6rem; height: 1.6rem;
  background: var(--nr-sky);
  border-radius: 6px;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 0.9rem;
}

/* ---------- Buttons ---------- */
.cl-btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: var(--nr-navy);
  color: #fff;
  border: 0;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.72rem 1.35rem;
  border-radius: var(--nr-radius-pill);
  cursor: pointer;
  transition: background 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
  text-decoration: none;
}
.cl-btn:hover {
  background: var(--nr-navy-dark);
  transform: translateY(-1px);
  box-shadow: var(--nr-shadow);
}
.cl-btn--outline {
  background: transparent;
  color: var(--nr-navy);
  border: 1.5px solid var(--nr-navy);
}
.cl-btn--outline:hover { background: var(--nr-navy); color: #fff; }
.cl-btn--ghost {
  background: var(--nr-sky);
  color: var(--nr-navy);
}
.cl-btn--ghost:hover { background: #B7DEE6; color: var(--nr-navy); transform: none; }
.cl-btn--teal { background: var(--nr-teal); }
.cl-btn--teal:hover { background: var(--nr-teal-dark); }

/* ---------- Generic interactive panel ---------- */
.cl-panel {
  background: var(--nr-bg-card);
  border: 1px solid var(--nr-border);
  border-radius: var(--nr-radius-lg);
  padding: 1.75rem;
  box-shadow: var(--nr-shadow);
}
.cl-panel + .cl-panel { margin-top: 1.5rem; }
.cl-panel-title {
  display: flex; align-items: center; gap: 0.6rem;
  font-family: var(--nr-font-display);
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: -0.01em;
  color: var(--nr-navy);
  margin: 0 0 0.4rem;
}
.cl-panel-sub {
  color: var(--nr-text-soft);
  font-size: 0.95rem;
  margin: 0 0 1.4rem;
}

/* Mode switch (Teach me / Show me) */
.cl-mode {
  display: inline-flex; gap: 0.25rem;
  background: var(--nr-sky);
  padding: 0.3rem;
  border-radius: var(--nr-radius-pill);
  margin-bottom: 1.25rem;
}
.cl-mode-btn {
  background: transparent;
  border: 0;
  color: var(--nr-navy);
  padding: 0.45rem 0.9rem;
  border-radius: var(--nr-radius-pill);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease;
}
.cl-mode-btn.is-active {
  background: var(--nr-navy);
  color: #fff;
}

/* ---------- Inputs ---------- */
.cl-input-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}
.cl-field { display: flex; flex-direction: column; gap: 0.35rem; }
.cl-field label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--nr-text-soft);
  letter-spacing: 0.01em;
}
.cl-input, .cl-select {
  font-family: inherit;
  font-size: 0.98rem;
  padding: 0.65rem 0.85rem;
  border: 1.5px solid var(--nr-border);
  border-radius: var(--nr-radius-sm);
  background: #fff;
  color: var(--nr-text);
  transition: border 0.18s ease, box-shadow 0.18s ease;
}
.cl-input:focus, .cl-select:focus {
  outline: none;
  border-color: var(--nr-teal);
  box-shadow: 0 0 0 3px rgba(45, 156, 156, 0.15);
}
.cl-help {
  font-size: 0.78rem;
  color: var(--nr-text-muted);
}

/* Slider */
.cl-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: var(--nr-border);
  border-radius: 3px;
  outline: none;
}
.cl-slider::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 22px; height: 22px;
  background: var(--nr-teal);
  border: 3px solid #fff;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(45, 156, 156, 0.4);
}
.cl-slider::-moz-range-thumb {
  width: 22px; height: 22px;
  background: var(--nr-teal);
  border: 3px solid #fff;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(45, 156, 156, 0.4);
}

/* ---------- Reasonableness banner ---------- */
.cl-reason-banner {
  margin-top: 1rem;
  padding: 1rem 1.15rem;
  border-radius: var(--nr-radius);
  display: flex; align-items: flex-start; gap: 0.75rem;
  font-size: 0.92rem;
  line-height: 1.5;
}
.cl-reason-banner .cl-reason-icon { font-size: 1.4rem; flex-shrink: 0; }
.cl-reason-banner--within  { background: #E8F5EE; color: #0F5132; border: 1px solid #B7D9C4; }
.cl-reason-banner--high,
.cl-reason-banner--low     { background: #FFF6E5; color: #7A4A0F; border: 1px solid #F5D89B; }
.cl-reason-banner--danger,
.cl-reason-banner--wrong_route { background: #FBE8E8; color: #7B1F1F; border: 1px solid #F0B5B5; }
.cl-reason-banner--unknown { background: var(--nr-sky); color: var(--nr-navy); border: 1px solid #B7DEE6; }
.cl-reason-banner a {
  color: inherit; text-decoration: underline; font-weight: 600;
}

/* ---------- Footer note ---------- */
.cl-footnote {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1.5rem clamp(1.25rem, 4vw, 2.5rem) 3rem;
  font-size: 0.82rem;
  color: var(--nr-text-muted);
  text-align: center;
}

/* ---------- Hub cards ---------- */
.cl-hub-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}
.cl-hub-card {
  background: #fff;
  border: 1px solid var(--nr-border);
  border-radius: var(--nr-radius-lg);
  padding: 1.8rem;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--nr-shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border 0.2s ease;
  position: relative;
  overflow: hidden;
}
.cl-hub-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--nr-shadow-lg);
  border-color: var(--nr-teal);
}
.cl-hub-card .cl-hub-icon {
  width: 48px; height: 48px;
  background: linear-gradient(135deg, var(--nr-teal) 0%, var(--nr-teal-dark) 100%);
  border-radius: var(--nr-radius-sm);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: #fff;
}
.cl-hub-card--gold .cl-hub-icon { background: linear-gradient(135deg, var(--nr-gold) 0%, #B9842D 100%); }
.cl-hub-card h3 {
  font-family: var(--nr-font-display);
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--nr-navy);
  margin: 0 0 0.5rem;
  letter-spacing: -0.01em;
}
.cl-hub-card p {
  margin: 0 0 1rem;
  color: var(--nr-text-soft);
  font-size: 0.94rem;
}
.cl-hub-card .cl-hub-meta {
  display: flex; flex-wrap: wrap; gap: 0.35rem;
}
.cl-hub-meta .cl-pill {
  background: var(--nr-sky);
  color: var(--nr-navy);
  border: 0;
  font-size: 0.74rem;
}

/* ---------- "Step narrator" pedagogy card ---------- */
.cl-steps {
  display: flex; flex-direction: column; gap: 0.85rem;
  margin-top: 1.25rem;
}
.cl-step {
  background: linear-gradient(180deg, #fff 0%, #FBFDFD 100%);
  border: 1px solid var(--nr-border);
  border-left: 3px solid var(--nr-teal);
  border-radius: var(--nr-radius);
  padding: 0.95rem 1.1rem;
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 0.85rem;
  opacity: 0; transform: translateY(8px);
  animation: cl-step-in 0.5s ease forwards;
}
.cl-step:nth-child(2) { animation-delay: 0.08s; }
.cl-step:nth-child(3) { animation-delay: 0.16s; }
.cl-step:nth-child(4) { animation-delay: 0.24s; }
.cl-step:nth-child(5) { animation-delay: 0.32s; }
.cl-step:nth-child(6) { animation-delay: 0.40s; }
.cl-step:nth-child(7) { animation-delay: 0.48s; }
@keyframes cl-step-in {
  to { opacity: 1; transform: translateY(0); }
}
.cl-step-num {
  width: 26px; height: 26px;
  background: var(--nr-navy);
  color: #fff;
  font-weight: 700;
  font-size: 0.82rem;
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
}
.cl-step-content {
  display: flex; flex-direction: column; gap: 0.35rem;
}
.cl-step-title {
  font-weight: 700;
  color: var(--nr-navy);
  font-size: 0.95rem;
}
.cl-step-why {
  color: var(--nr-text-soft);
  font-size: 0.88rem;
}
.cl-step-math {
  font-family: var(--nr-font-mono);
  font-size: 0.95rem;
  background: var(--nr-bg);
  padding: 0.5rem 0.7rem;
  border-radius: 6px;
  margin-top: 0.25rem;
  border: 1px solid var(--nr-border-soft);
  color: var(--nr-navy);
  overflow-x: auto;
  white-space: nowrap;
}
.cl-cancel {
  position: relative;
  display: inline-block;
}
.cl-cancel::after {
  content: "";
  position: absolute;
  left: -2px; right: -2px;
  top: 50%;
  height: 2px;
  background: var(--nr-danger);
  transform: scaleX(0);
  transform-origin: left;
  animation: cl-cancel-line 0.5s 0.3s ease forwards;
}
@keyframes cl-cancel-line {
  to { transform: scaleX(1); }
}

.cl-answer {
  margin-top: 1rem;
  background: linear-gradient(135deg, #E8F5EE 0%, #D4EDE0 100%);
  border: 1px solid #B7D9C4;
  border-radius: var(--nr-radius);
  padding: 1.1rem 1.25rem;
  font-family: var(--nr-font-display);
  font-weight: 700;
  font-size: 1.4rem;
  color: #0F5132;
  display: flex; align-items: center; gap: 0.6rem;
  letter-spacing: -0.01em;
}
.cl-answer .cl-answer-icon { font-size: 1.6rem; }

/* ---------- Method cards (four-method solver) ---------- */
.cl-methods {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}
.cl-method-card {
  background: #fff;
  border: 1px solid var(--nr-border);
  border-radius: var(--nr-radius);
  padding: 1.25rem;
  position: relative;
  transition: border 0.2s ease, box-shadow 0.2s ease;
}
.cl-method-card:hover {
  border-color: var(--nr-teal);
  box-shadow: var(--nr-shadow);
}
.cl-method-card h4 {
  font-family: var(--nr-font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--nr-navy);
  margin: 0 0 0.25rem;
}
.cl-method-card .cl-method-tag {
  display: inline-block;
  background: var(--nr-sky);
  color: var(--nr-navy);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.18rem 0.55rem;
  border-radius: var(--nr-radius-pill);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 0.65rem;
}

/* ---------- Floating dot annotations ---------- */
.cl-flag {
  display: inline-block;
  background: var(--nr-danger);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.18rem 0.55rem;
  border-radius: var(--nr-radius-pill);
  margin-left: 0.5rem;
  letter-spacing: 0.03em;
}
.cl-flag--warn { background: var(--nr-warn); }
.cl-flag--ok   { background: var(--nr-success); }

/* Subnav back to hub */
.cl-subnav {
  background: rgba(255, 255, 255, 0.08);
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.4rem 0.85rem;
  border-radius: var(--nr-radius-pill);
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  transition: background 0.18s ease;
}
.cl-subnav:hover { background: rgba(255, 255, 255, 0.16); color: #fff; }

/* HR for sections */
hr.cl-hr {
  border: 0;
  border-top: 1px solid var(--nr-border);
  margin: 3rem 0;
}