/* solver.css — /solver (solver.js). styles.css tokens, light + dark. */
.sv { max-width: 1160px; margin: 0 auto; padding: 1.6rem 1.25rem 4rem; }
.sv-hero { text-align: center; max-width: 780px; margin: 0 auto 1.6rem; }
.sv-eyebrow { font: 700 .72rem/1 "Hanken Grotesk", sans-serif; letter-spacing: .12em; text-transform: uppercase;
  color: var(--gold); margin: 0 0 .6rem; }
.sv-hero h1 { font-family: "Playfair Display", Georgia, serif; font-weight: 800; font-size: clamp(1.9rem, 4.4vw, 2.9rem);
  line-height: 1.08; color: var(--purple); margin: 0 0 .7rem; }
.sv-lede { color: var(--grey); font-size: 1.04rem; line-height: 1.6; margin: 0 auto 1.3rem; max-width: 62ch; }
.sv-modes { display: grid; grid-template-columns: 1fr 1fr; gap: .7rem; max-width: 640px; margin: 0 auto; }
.sv-mode { display: grid; justify-items: center; gap: .25rem; text-align: center; border: 1.5px solid var(--line);
  background: var(--white); color: var(--ink); border-radius: 18px; padding: .95rem .8rem; cursor: pointer; font: inherit;
  transition: border-color .15s, box-shadow .15s, transform .12s; }
.sv-mode:hover { transform: translateY(-1px); }
.sv-mode b { font: 800 1.02rem/1.2 "Archivo", sans-serif; }
.sv-mode span:last-child { font-size: .8rem; color: var(--grey); }
.sv-mode-ico { font-size: 1.5rem; }
.sv-mode[aria-checked="true"] { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent),
  0 12px 30px rgba(46, 27, 74, .1); }
.sv-mode:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }

.sv-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 1.2rem; align-items: start; }
.sv-card { background: var(--white); border: 1px solid var(--line); border-radius: 20px; padding: 1.2rem;
  box-shadow: 0 14px 40px rgba(46, 27, 74, .06); min-width: 0; }
.sv-step + .sv-step { margin-top: 1.2rem; }
.sv-step h2 { display: flex; align-items: center; gap: .55rem; margin: 0 0 .7rem; font: 800 1.02rem/1.2 "Archivo", sans-serif; color: var(--ink); }
.sv-num { width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center; background: var(--accent);
  color: var(--on-accent); font-size: .78rem; }

.sv-drop { border: 2px dashed var(--line); border-radius: 16px; background: var(--page); min-height: 170px;
  display: grid; transition: border-color .15s, background .15s; overflow: hidden; }
.sv-drop.is-over { border-color: var(--accent); background: var(--accent-soft); }
.sv-drop.has-img { border-style: solid; background: var(--cream); }
.sv-drop[hidden] { display: none; }
.sv-drop-empty { display: grid; place-items: center; align-content: center; gap: .6rem; text-align: center; padding: 1.2rem; }
.sv-drop-empty p { margin: 0; color: var(--grey); }
.sv-drop-empty small { color: var(--grey); opacity: .8; }
.sv-drop-btns { display: flex; gap: .5rem; flex-wrap: wrap; justify-content: center; }
.sv-btn { display: inline-flex; align-items: center; gap: .35rem; border: 0; cursor: pointer; border-radius: 11px;
  background: var(--accent); color: var(--on-accent); padding: .6rem 1rem; font: 700 .88rem/1 "Hanken Grotesk", sans-serif; }
.sv-btn:hover { background: var(--accent-hover); }
.sv-btn-ghost { background: var(--white); color: var(--ink); border: 1px solid var(--line); }
.sv-btn-ghost:hover { background: var(--cream); }
.sv-link { border: 0; background: none; color: var(--navy); cursor: pointer; font: 700 .8rem/1 "Hanken Grotesk", sans-serif; padding: .2rem .3rem; }
.sv-link:hover { text-decoration: underline; }

.sv-crop { position: relative; line-height: 0; user-select: none; touch-action: none; }
.sv-crop img { width: 100%; max-height: 460px; object-fit: contain; display: block; }
.sv-crop-rect { position: absolute; border: 2px solid var(--accent); box-shadow: 0 0 0 9999px rgba(15, 17, 23, .45);
  cursor: move; touch-action: none; }
.sv-crop-rect:focus-visible { outline: 2px solid var(--gold); }
.sv-h { position: absolute; width: 16px; height: 16px; background: #fff; border: 2px solid var(--accent); border-radius: 4px; }
.sv-h-nw { left: -9px; top: -9px; cursor: nwse-resize; } .sv-h-ne { right: -9px; top: -9px; cursor: nesw-resize; }
.sv-h-sw { left: -9px; bottom: -9px; cursor: nesw-resize; } .sv-h-se { right: -9px; bottom: -9px; cursor: nwse-resize; }
.sv-crop-bar { display: flex; align-items: center; gap: .4rem; padding: .5rem .7rem; font-size: .78rem; color: var(--grey);
  line-height: 1.3; background: var(--white); }
.sv-crop-bar span { flex: 1; }

.sv-tabs { display: inline-flex; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; margin-bottom: .6rem; }
.sv-tabs button { border: 0; background: var(--white); color: var(--grey); padding: .45rem .9rem; cursor: pointer;
  font: 700 .82rem/1 "Hanken Grotesk", sans-serif; }
.sv-tabs button[aria-selected="true"] { background: var(--accent); color: var(--on-accent); }
.sv-text { width: 100%; border: 1.5px solid var(--line); border-radius: 14px; padding: .8rem; background: var(--page);
  color: var(--ink); font: 500 .95rem/1.5 ui-monospace, "JetBrains Mono", Consolas, monospace; resize: vertical; }
.sv-extras { display: grid; grid-template-columns: 1fr 1fr; gap: .7rem; }
.sv-extras label { display: grid; gap: .3rem; font-size: .8rem; font-weight: 700; color: var(--grey); }
.sv-extras small { font-weight: 500; }
.sv-extras select, .sv-extras input { border: 1px solid var(--line); border-radius: 10px; background: var(--page);
  color: var(--ink); padding: .55rem .6rem; font: inherit; font-size: .9rem; min-width: 0; }
.sv-go { width: 100%; margin-top: 1.1rem; border: 0; border-radius: 14px; background: var(--gold); color: #2a1606;
  padding: .95rem; font: 800 1.02rem/1 "Archivo", sans-serif; cursor: pointer; box-shadow: 0 8px 22px rgba(232, 145, 58, .3); }
.sv-go:disabled { opacity: .45; cursor: not-allowed; box-shadow: none; }
.sv-status { margin: .6rem 0 0; font-size: .84rem; color: var(--grey); min-height: 1em; }
.sv-status.is-bad { color: var(--pink-ink); }

.sv-out { position: sticky; top: 84px; min-height: 320px; }
.sv-placeholder { text-align: center; color: var(--grey); padding: 1.5rem .6rem; }
.sv-ph-ico { font-size: 2.6rem; }
.sv-howto { text-align: left; max-width: 360px; margin: 1rem auto 0; padding-left: 1.1rem; display: grid; gap: .4rem; font-size: .9rem; }
.sv-loading { display: grid; justify-items: center; gap: .5rem; padding: 3rem 1rem; color: var(--grey); }
.sv-loading b { color: var(--ink); }
.sv-spin { width: 22px; height: 22px; border-radius: 50%; border: 3px solid var(--line); border-top-color: var(--accent);
  animation: sv-spin .8s linear infinite; display: inline-block; }
@keyframes sv-spin { to { transform: rotate(360deg); } }
.sv-result-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: .4rem; }
.sv-tag { font: 800 .72rem/1 "Hanken Grotesk", sans-serif; letter-spacing: .06em; text-transform: uppercase;
  background: var(--green); color: var(--green-ink); border-radius: 999px; padding: .3rem .6rem; }
.sv-answer { font-size: .98rem; line-height: 1.65; }
.sv-answer h3 { font: 800 1rem/1.3 "Archivo", sans-serif; color: var(--purple); margin: 1.1rem 0 .45rem; }
.sv-answer h3:first-child { margin-top: .3rem; }
.sv-answer .step { background: var(--cream); border-left: 3px solid var(--accent); border-radius: 0 10px 10px 0;
  padding: .55rem .8rem; margin: .4rem 0; }
.sv-answer .mark { border-radius: 10px; padding: .55rem .8rem .55rem 2.1rem; margin: .4rem 0; position: relative; }
.sv-answer .mark::before { position: absolute; left: .7rem; top: .55rem; font-weight: 900; }
.sv-answer .mark.ok { background: var(--green); color: var(--ink); }
.sv-answer .mark.ok::before { content: "✓"; color: var(--green-ink); }
.sv-answer .mark.bad { background: var(--pink); color: var(--ink); }
.sv-answer .mark.bad::before { content: "✗"; color: var(--pink-ink); }
.sv-err { color: var(--pink-ink); background: var(--pink); border-radius: 12px; padding: .8rem 1rem; }

.sv-follow { margin-top: 1.2rem; border-top: 1px solid var(--line); padding-top: 1rem; display: grid; gap: .5rem; }
.sv-follow label { font-weight: 700; font-size: .88rem; }
.sv-follow-row { display: flex; gap: .5rem; }
.sv-follow-row input { flex: 1; min-width: 0; border: 1px solid var(--line); border-radius: 11px; background: var(--page);
  color: var(--ink); padding: .6rem .75rem; font: inherit; }
.sv-thread { display: grid; gap: .5rem; }
.sv-q { justify-self: end; background: var(--accent); color: var(--on-accent); border-radius: 14px 14px 4px 14px;
  padding: .5rem .8rem; max-width: 85%; font-size: .92rem; }
.sv-a { background: var(--cream); border-radius: 14px 14px 14px 4px; padding: .6rem .85rem; font-size: .94rem; line-height: 1.55; }
.sv-a p { margin: 0 0 .5rem; } .sv-a p:last-child { margin: 0; }
.sv-more { margin: .2rem 0 0; font-size: .82rem; color: var(--grey); }
.sv-more a { color: var(--navy); font-weight: 700; }

.sv-which { margin-top: 2rem; }
.sv-which h2 { font: 800 1.2rem/1.2 "Archivo", sans-serif; color: var(--purple); margin: 0 0 .8rem; }
.sv-which-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: .8rem; }
.sv-which-grid > div { background: var(--white); border: 1px solid var(--line); border-radius: 16px; padding: 1rem;
  display: grid; gap: .35rem; align-content: start; }
.sv-which-grid b { font: 800 1rem/1.2 "Archivo", sans-serif; }
.sv-which-grid span { color: var(--grey); font-size: .88rem; line-height: 1.5; }
.sv-which-grid a { color: var(--navy); font-weight: 700; font-size: .85rem; text-decoration: none; }

@media (max-width: 900px) {
  .sv-grid { grid-template-columns: 1fr; }
  .sv-out { position: static; }
  .sv-which-grid { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .sv-modes, .sv-extras { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { .sv-spin { animation: none; } .sv-mode { transition: none; } }