/* TerraTrend - modals.css
   Method/about modals, steps, about-grid and accessibility */

/* gradient text for about section headline */
.about-grid h2 {
  background: linear-gradient(94deg, #fff 30%, var(--grad-a) 60%, var(--grad-b) 85%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- Steps: numbered timeline ---------- */
/* NOTE: use a number, not color, to carry the ordinal - one thing
   earns its place (simplicity) and the glyph is pure decoration. */
.steps {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 36px;
}
.step {
  position: relative;
  background: var(--surface-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px 26px 22px 30px;
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease, transform 0.5s ease, border-color 0.3s, box-shadow 0.3s;
  overflow: hidden;
}
/* subtle top hairline instead of a gradient glow - restrained, one accent */
.step::before {
  content: "";
  position: absolute;
  top: 0; left: 16%; right: 16%;
  height: 2px;
  background: var(--gradient-line);
  opacity: 0;
  transition: opacity 0.3s;
}
.step:hover { border-color: var(--line-bright); box-shadow: var(--glow-border); }
.step:hover::before { opacity: 1; }
.step.revealed { opacity: 1; transform: translateY(0); }
/* strengthen card plate so step text stays readable over starfield */
.step { background: linear-gradient(180deg, rgba(9, 10, 24, 0.82), rgba(10, 11, 26, 0.62)); }
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--line-bright);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--accent-2);
  letter-spacing: 0.1em;
  margin-bottom: 12px;
  position: relative;
}
/* the icon set matches the weight of adjacent text */
.step h3 { font-size: var(--text-lg); margin-bottom: 8px; font-weight: var(--font-weight-semibold); }
.step p { color: var(--text-secondary); font-size: var(--text-sm); line-height: 1.6; }

/* ---------- About ---------- */
.about-byline {
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  margin: 6px 0 22px;
}
.about-byline strong { color: var(--accent-2); font-weight: 500; }
.byline-sep  { display: inline; }
.byline-team { display: inline; }

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 60px;
}
.about-grid > div > p { color: var(--muted); line-height: 1.7; margin-bottom: 14px; }
.mono-note {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--accent-2);
  opacity: 0.85;
}
/* about facts as a 2x2 bento of tiles */
.about-facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  align-self: start;
}
.about-facts div {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.5s, transform 0.5s, border-color 0.3s, box-shadow 0.3s;
  overflow: hidden;
}
.about-facts div::before {
  content: "";
  position: absolute;
  top: 0; left: 16%; right: 16%;
  height: 1px;
  background: var(--gradient-line);
  opacity: 0.6;
}
.about-facts div.revealed { opacity: 1; transform: translateY(0); }
.about-facts div:hover {
  border-color: var(--line-bright);
  box-shadow: 0 0 34px -12px rgba(139, 124, 255, 0.5);
}
.about-facts strong { color: var(--dim); font-weight: 500; font-size: 0.72rem; white-space: nowrap; text-transform: uppercase; letter-spacing: 0.14em; }
.about-facts span { font-size: 0.85rem; line-height: 1.45; }
/* ---------- Popup modals (method + about) ---------- */
.method-modal {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.method-modal[hidden] { display: none; }
.method-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(3, 4, 12, 0.72);
}
.method-card {
  position: relative;
  margin: auto; /* centers vertically even when content is shorter than viewport */
  max-width: 860px;
  width: 100%;
  max-height: 86vh;
  overflow-y: auto;
  background: var(--panel-solid);
  border: 1px solid var(--line-bright);
  border-radius: 20px;
  padding: 30px 34px 34px;
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.6), 0 0 70px -30px rgba(139, 124, 255, 0.55);
  animation: modalIn 0.3s ease;
}
@keyframes modalIn {
  from { opacity: 0; transform: translateY(16px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.method-card h3 { font-size: 1.35rem; margin-bottom: 4px; }
.method-card .panel-head {
  display: flex;
  align-items: center;
  margin-bottom: 14px;
  padding-right: 40px;
}
.method-card .panel-close {
  position: absolute;
  top: 16px;
  right: 18px;
  background: rgba(0, 0, 0, 0.2);
}
body.modal-open { overflow: hidden; } /* no page scroll behind an open popup */

/* source links inside about modal */
.mono-note a, .about-facts a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: rgba(34, 224, 238, 0.35);
  text-underline-offset: 2px;
  transition: color 0.2s, text-decoration-color 0.2s;
}
.mono-note a:hover, .about-facts a:hover {
  color: var(--accent-2);
  text-decoration-color: var(--accent-2);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: 1fr; gap: 30px; }
}
@media (max-width: 600px) {
  .method-modal { padding: 12px; align-items: flex-end; }
  .method-card {
    padding: 20px 16px 24px;
    max-height: 86dvh;
    max-height: 86vh;
    scrollbar-width: none;
  }
  .method-card::-webkit-scrollbar { display: none; }
  .steps { grid-template-columns: 1fr; gap: 12px; }
  .about-facts { grid-template-columns: 1fr; }
  .about-grid { gap: 20px; }
  .byline-sep  { display: none; }
  .byline-team { display: block; }
}