/* =====================================================================
   Climate Positivity calculator — warm, optimistic, zero clutter.
   Designed to be legible from the back of a lecture room.
   ===================================================================== */

:root {
  --bg: #fdf8f0;            /* warm cream */
  --ink: #2d2a26;           /* warm near-black */
  --ink-soft: #6b645c;
  --individual: #e8833a;    /* warm amber-orange : the speck */
  --individual-soft: #fbe3cf;
  --professional: #1e7d6b;  /* deep optimistic teal-green : the tower */
  --professional-soft: #d3ece6;
  --accent: #c5481f;
  --card: #ffffff;
  --line: #e7ddd0;
  --radius: 14px;
  font-size: clamp(15px, 1.4vw, 20px);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Avenir Next", Avenir, Seravek, "Gill Sans", -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.45;
}

/* ---------- header ---------- */

.masthead {
  text-align: center;
  padding: 1.6rem 1rem 0.4rem;
}
.masthead h1 {
  margin: 0;
  font-size: 2.4rem;
  letter-spacing: -0.02em;
  font-weight: 700;
}
.masthead h1::after {
  content: "";
  display: block;
  width: 4.5rem;
  height: 0.3rem;
  margin: 0.45rem auto 0;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--individual), var(--professional));
}
.tagline {
  margin: 0.6rem 0 0;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

/* ---------- layout ---------- */

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.2rem 0.5rem;
}

.pickers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
@media (max-width: 760px) {
  .pickers { grid-template-columns: 1fr; }
}

.picker {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem 0.9rem;
}
.picker h2 {
  margin: 0 0 0.7rem;
  font-size: 1.12rem;
  display: flex;
  align-items: center;
  gap: 0.55rem;
}
.step-num {
  display: inline-grid;
  place-items: center;
  width: 1.7em; height: 1.7em;
  border-radius: 50%;
  color: #fff;
  font-size: 0.85em;
  flex: none;
}
.picker-individual .step-num { background: var(--individual); }
.picker-professional .step-num { background: var(--professional); }

/* ---------- chips ---------- */

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}
.chip {
  border: 1.5px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  border-radius: 99px;
  padding: 0.42em 0.95em;
  font: inherit;
  font-size: 0.92rem;
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: left;
}
.chip:hover { border-color: var(--ink-soft); }
.picker-individual .chip.active {
  background: var(--individual);
  border-color: var(--individual);
  color: #fff;
}
.picker-professional .chip.active {
  background: var(--professional);
  border-color: var(--professional);
  color: #fff;
}
.chip.chip-custom { border-style: dashed; color: var(--ink-soft); }

/* ---------- custom entry ---------- */

.custom-entry {
  margin-top: 0.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}
.custom-entry[hidden] { display: none; }
.custom-entry input[type="text"] {
  width: 100%;
}
.custom-value {
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
}
.custom-entry input, .custom-entry select {
  font: inherit;
  font-size: 0.92rem;
  padding: 0.4em 0.6em;
  border: 1.5px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
}
.custom-entry input[type="number"] { width: 7.5em; }
.apply-btn {
  font: inherit;
  font-size: 0.92rem;
  padding: 0.4em 1em;
  border: none;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  cursor: pointer;
}

.selected-note {
  margin: 0.65rem 0 0;
  font-size: 0.86rem;
  color: var(--ink-soft);
  min-height: 2.2em;
}
.selected-note .src { opacity: 0.75; }

/* ---------- result ---------- */

.result {
  text-align: center;
  margin-top: 1.4rem;
}
.result-headline {
  margin: 0;
  font-size: clamp(1.5rem, 3.4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.result-headline .times { color: var(--professional); }
.result-subline {
  margin: 0.35rem 0 0.9rem;
  font-size: 1.08rem;
  color: var(--ink-soft);
}

.view-toggle {
  display: inline-flex;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 99px;
  padding: 0.25rem;
  gap: 0.25rem;
  margin-bottom: 0.8rem;
}
.toggle-btn {
  font: inherit;
  font-size: 0.95rem;
  border: none;
  background: transparent;
  color: var(--ink-soft);
  padding: 0.4em 1.1em;
  border-radius: 99px;
  cursor: pointer;
}
.toggle-btn.active {
  background: var(--ink);
  color: #fff;
}
.toggle-hint { font-size: 0.8em; opacity: 0.7; }

.chart {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.6rem;
}
.chart svg { display: block; width: 100%; height: auto; }

/* SVG text inherits page font */
.chart text {
  font-family: inherit;
}

/* bar grow animation */
@keyframes rise {
  from { transform: scaleY(0); }
  to   { transform: scaleY(1); }
}
.bar-anim {
  transform-origin: bottom;
  transform-box: fill-box;
  animation: rise 0.7s cubic-bezier(0.2, 0.7, 0.3, 1);
}

/* ---------- caveat footer ---------- */

.caveat {
  max-width: 1100px;
  margin: 1.2rem auto 2rem;
  padding: 0 1.2rem;
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.88rem;
}
.caveat strong { color: var(--ink); }