/* ============================================================
   CANDLE — styles
   Dark trading-terminal aesthetic with a light theme variant.
   All colours via custom properties so theming is one switch.
   ============================================================ */

:root {
  --bg: #0b0f17;
  --bg-grad-1: #0e1422;
  --bg-grad-2: #070a11;
  --panel: #111827;
  --panel-2: #0d1320;
  --line: #1f2937;
  --line-soft: #161e2e;
  --text: #e6edf3;
  --text-dim: #9aa7b8;
  --text-faint: #5b6678;
  --bull: #16c784;
  --bull-dim: #0f7d54;
  --bear: #ea3943;
  --bear-dim: #9e2a31;
  --accent: #4f8cff;
  --ma-slow: #f0a843;
  --grid: rgba(255, 255, 255, 0.05);
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.45);
  --radius: 16px;
  --radius-sm: 10px;
  --ff: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --ff-mono: ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", Menlo, Consolas, monospace;
}

[data-theme="light"] {
  --bg: #f4f6fb;
  --bg-grad-1: #ffffff;
  --bg-grad-2: #e9edf5;
  --panel: #ffffff;
  --panel-2: #f3f6fc;
  --line: #dce3ed;
  --line-soft: #e8edf5;
  --text: #0e1422;
  --text-dim: #51607a;
  --text-faint: #93a0b5;
  --bull: #0a9d63;
  --bull-dim: #0a7d50;
  --bear: #d62f3a;
  --bear-dim: #a8242d;
  --accent: #2f6bff;
  --ma-slow: #d98a18;
  --grid: rgba(10, 20, 40, 0.06);
  --shadow: 0 10px 36px rgba(20, 35, 80, 0.12);
}

* { box-sizing: border-box; }

/* The hidden attribute must always win, even over display:flex rules */
[hidden] { display: none !important; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--ff);
  color: var(--text);
  background: var(--bg);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

/* Fixed background layer — avoids the mobile repaint cost of
   background-attachment: fixed while keeping the gradient steady. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(1200px 600px at 50% -10%, var(--bg-grad-1), transparent 70%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-grad-2) 100%);
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 8px;
  background: var(--accent);
  color: #fff;
  padding: 8px 14px;
  border-radius: 8px;
  z-index: 50;
  text-decoration: none;
}
.skip-link:focus { left: 12px; }

/* ---------- Top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px clamp(12px, 4vw, 32px);
  max-width: 980px;
  width: 100%;
  margin: 0 auto;
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand__mark { width: 34px; height: 34px; }
.brand__mark line { stroke: var(--text-dim); stroke-width: 2.5; stroke-linecap: round; }
.brand__mark .bull { fill: var(--bull); }
.brand__mark .bear { fill: var(--bear); }
.brand__text { display: flex; flex-direction: column; line-height: 1; }
.brand__name { font-weight: 800; letter-spacing: 0.16em; font-size: 1.05rem; }
.brand__tag { font-size: 0.66rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--text-faint); margin-top: 4px; }

.toolbar { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 40px; height: 40px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text-dim);
  font-size: 1.05rem;
  cursor: pointer;
  transition: border-color .15s ease, color .15s ease, transform .12s ease, background .15s ease;
}
.icon-btn:hover { color: var(--text); border-color: var(--text-faint); }
.icon-btn:active { transform: translateY(1px); }
.icon-btn svg { width: 18px; height: 18px; fill: currentColor; }
.icon-btn[aria-pressed="false"] { color: var(--text-faint); opacity: 0.7; }
.icon-btn--lang { font-size: 0.74rem; font-weight: 800; letter-spacing: 0.06em; font-family: var(--ff-mono); }

/* ---------- Stage / panel ---------- */
.stage {
  flex: 1;
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  padding: 4px clamp(8px, 3vw, 32px) 24px;
  display: flex;
}

.panel {
  background: linear-gradient(180deg, var(--panel) 0%, var(--panel-2) 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: clamp(12px, 2.6vw, 26px);
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.meta { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.meta__title { margin: 0; font-size: 1.15rem; font-weight: 700; letter-spacing: 0.01em; }
.meta__title #puzzle-number { color: var(--accent); font-family: var(--ff-mono); }
.meta__sub { margin: 4px 0 0; color: var(--text-faint); font-size: 0.8rem; letter-spacing: 0.02em; }

.progress { display: flex; gap: 7px; list-style: none; margin: 4px 0 0; padding: 0; }
.progress li {
  width: 13px; height: 13px;
  border-radius: 50%;
  background: var(--line);
  border: 1px solid transparent;
  transition: background .2s ease, transform .2s ease, box-shadow .2s ease;
}
.progress li.is-correct { background: var(--bull); box-shadow: 0 0 10px var(--bull-dim); }
.progress li.is-wrong { background: var(--bear); box-shadow: 0 0 10px var(--bear-dim); }
.progress li.is-current { border-color: var(--accent); transform: scale(1.18); }

/* ---------- Mode bar (tabs + levels) ---------- */
.modebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}
.tabs {
  display: inline-flex;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 11px;
  padding: 3px;
  gap: 3px;
}
.tabs button {
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-family: inherit;
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  padding: 7px 16px;
  border-radius: 8px;
  cursor: pointer;
  transition: background .15s ease, color .15s ease;
}
.tabs button[aria-selected="true"] { background: var(--accent); color: #fff; }
.tabs button:not([aria-selected="true"]):hover { color: var(--text); }

.levelbar { display: flex; gap: 6px; flex-wrap: wrap; }
.levelbar button {
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text-dim);
  font-family: inherit;
  font-size: 0.74rem;
  font-weight: 600;
  padding: 6px 11px;
  border-radius: 999px;
  cursor: pointer;
  transition: border-color .15s ease, color .15s ease, background .15s ease;
}
.levelbar button:hover { color: var(--text); border-color: var(--text-faint); }
.levelbar button.is-active {
  color: var(--text);
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
}

/* ---------- Indicator chips ---------- */
.indbar { display: flex; gap: 6px; flex-wrap: wrap; }
.ind-chip {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text-faint);
  font-family: var(--ff-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 5px 11px;
  border-radius: 999px;
  cursor: pointer;
  transition: border-color .15s ease, color .15s ease, background .15s ease;
}
.ind-chip:hover { color: var(--text-dim); border-color: var(--text-faint); }
.ind-chip[aria-pressed="true"] {
  color: var(--text);
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 13%, transparent);
}

/* ---------- Charts ---------- */
.chart-wrap, .subpanel {
  margin: 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--panel-2);
}
.chart { display: block; width: 100%; height: auto; }

.subpanel figcaption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 12px 0;
  font-size: 0.64rem;
  font-family: var(--ff-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.pane-val { font-weight: 700; color: var(--text-dim); }
.pane-val.val-ob, .pane-val.val-neg { color: var(--bear); }
.pane-val.val-os, .pane-val.val-pos { color: var(--bull); }

.chart .gridline { stroke: var(--grid); stroke-width: 1; }
.chart .axislabel { fill: var(--text-faint); font-family: var(--ff-mono); font-size: 10px; }
.chart .baseline { stroke: var(--line); stroke-width: 1; }
.chart .divider { stroke: var(--text-faint); stroke-width: 1; stroke-dasharray: 3 4; opacity: 0.5; }
.chart .divider-label { fill: var(--text-faint); font-size: 9px; letter-spacing: 0.12em; }
.chart .legend { font-family: var(--ff-mono); font-size: 10px; font-weight: 700; }
.chart .legend.lg-fast { fill: var(--accent); }
.chart .legend.lg-slow { fill: var(--ma-slow); }
.chart .legend.lg-vol { fill: var(--text-faint); }

.chart .wick { stroke-width: 1.4; stroke-linecap: round; }
.chart .candle.bull .wick { stroke: var(--bull); }
.chart .candle.bull .body { fill: var(--bull); }
.chart .candle.bear .wick { stroke: var(--bear); }
.chart .candle.bear .body { fill: var(--bear); }

.chart .candle--new { animation: candle-in .42s cubic-bezier(.2,.9,.3,1.2) both; transform-box: fill-box; transform-origin: bottom; }
@keyframes candle-in {
  0% { opacity: 0; transform: scaleY(0.02) translateY(6px); }
  100% { opacity: 1; transform: scaleY(1) translateY(0); }
}

.chart .ma-line { fill: none; stroke-width: 1.8; stroke-linejoin: round; stroke-linecap: round; }
.chart .ma-fast { stroke: var(--accent); }
.chart .ma-slow { stroke: var(--ma-slow); }

.chart .srline { stroke-width: 1.2; stroke-dasharray: 6 5; opacity: 0.85; }
.chart .srline.res { stroke: var(--bear); }
.chart .srline.sup { stroke: var(--bull); }
.chart .srline.weak { opacity: 0.4; }
.chart .sr-label { font-family: var(--ff-mono); font-size: 9px; }
.chart .sr-label.res { fill: var(--bear); }
.chart .sr-label.sup { fill: var(--bull); }

.chart .volbar.bull { fill: var(--bull); opacity: 0.45; }
.chart .volbar.bear { fill: var(--bear); opacity: 0.45; }
.chart .vol-avg { fill: none; stroke: var(--text-faint); stroke-width: 1; stroke-dasharray: 2 3; opacity: 0.8; }

.chart .rsi-line { fill: none; stroke: var(--accent); stroke-width: 1.8; stroke-linejoin: round; }
.chart .rsi-band { stroke: var(--text-faint); stroke-width: 1; stroke-dasharray: 3 4; opacity: 0.45; }
.chart .rsi-zone { fill: var(--accent); opacity: 0.05; }

.chart .zero-line { stroke: var(--text-faint); stroke-width: 1; opacity: 0.5; }
.chart .macd-line { fill: none; stroke: var(--accent); stroke-width: 1.6; }
.chart .sig-line { fill: none; stroke: var(--ma-slow); stroke-width: 1.4; }
.chart .macd-hist.pos { fill: var(--bull); opacity: 0.55; }
.chart .macd-hist.neg { fill: var(--bear); opacity: 0.55; }

.chart .placeholder-band { fill: var(--accent); opacity: 0.07; }
.chart .placeholder-q {
  fill: var(--accent);
  font-family: var(--ff-mono);
  font-weight: 700;
  font-size: 20px;
  text-anchor: middle;
  animation: q-pulse 1.4s ease-in-out infinite;
}
@keyframes q-pulse { 0%,100% { opacity: 0.45; } 50% { opacity: 1; } }

/* ---------- Question + controls ---------- */
.question { margin: 0; text-align: center; color: var(--text-dim); font-size: 0.95rem; }
.question .up { color: var(--bull); }
.question .down { color: var(--bear); }

.controls { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.call {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 16px 12px;
  border-radius: 14px;
  border: 1.5px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
  font-family: inherit;
  transition: transform .1s ease, border-color .15s ease, box-shadow .2s ease, background .15s ease;
  user-select: none;
  touch-action: manipulation;
}
.call__arrow { font-size: 1.35rem; line-height: 1; }
.call__label { font-weight: 800; letter-spacing: 0.14em; font-size: 1.02rem; }
.call__hint { font-size: 0.7rem; color: var(--text-faint); letter-spacing: 0.04em; }

.call--bull:hover { border-color: var(--bull); box-shadow: 0 0 0 1px var(--bull), 0 8px 24px rgba(22,199,132,.18); }
.call--bull .call__arrow { color: var(--bull); }
.call--bear:hover { border-color: var(--bear); box-shadow: 0 0 0 1px var(--bear), 0 8px 24px rgba(234,57,67,.18); }
.call--bear .call__arrow { color: var(--bear); }
.call:active { transform: translateY(2px); }
.call:disabled { opacity: 0.4; cursor: not-allowed; box-shadow: none; }

.call.flash-bull, .call.flash-bear { animation: flash-good .5s ease; }
@keyframes flash-good { 0% { transform: scale(1); } 35% { transform: scale(1.04); } 100% { transform: scale(1); } }

/* ---------- Status ---------- */
.status { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 24px; flex-wrap: wrap; }
.score { margin: 0; color: var(--text-dim); font-size: 0.9rem; }
.score strong { color: var(--text); font-family: var(--ff-mono); }
.feedback { margin: 0; font-size: 0.9rem; font-weight: 600; min-height: 1.2em; }
.feedback.good { color: var(--bull); }
.feedback.bad { color: var(--bear); }

/* ---------- Analysis card ---------- */
.analysis {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel-2);
  padding: 14px 16px;
  animation: an-in .3s ease both;
}
@keyframes an-in { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
.analysis h3 {
  margin: 0 0 8px;
  font-size: 0.66rem;
  font-family: var(--ff-mono);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-faint);
  font-weight: 700;
}
.an-headline { margin: 0 0 4px; font-size: 0.92rem; font-weight: 700; line-height: 1.4; }
.an-headline.good { color: var(--bull); }
.an-headline.bad { color: var(--bear); }
.an-headline.neutral { color: var(--text); }
.an-lead { margin: 0 0 10px; font-size: 0.8rem; color: var(--text-faint); }
.an-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 7px; }
.an-row {
  display: grid;
  grid-template-columns: 18px 1fr 20px;
  gap: 9px;
  align-items: start;
  font-size: 0.84rem;
  line-height: 1.4;
  color: var(--text-dim);
}
.an-dir { font-size: 0.78rem; text-align: center; padding-top: 1px; }
.an-dir.up { color: var(--bull); }
.an-dir.down { color: var(--bear); }
.an-dir.flat { color: var(--text-faint); }
.an-verdict { text-align: center; font-weight: 800; }
.an-verdict.hit { color: var(--bull); }
.an-verdict.miss { color: var(--bear); }
.an-verdict.flat { color: var(--text-faint); font-weight: 400; }

/* ---------- Footer ---------- */
.footer {
  max-width: 980px; width: 100%; margin: 0 auto;
  padding: 8px clamp(16px, 4vw, 32px) 28px;
  color: var(--text-faint);
  font-size: 0.74rem;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  flex-wrap: wrap;
}
.footer__links { display: flex; align-items: center; gap: 16px; }
.link-btn {
  background: none; border: none; color: var(--text-dim); cursor: pointer;
  text-decoration: underline; text-underline-offset: 3px; font-size: 0.74rem; font-family: inherit;
  padding: 0;
}
.link-btn:hover { color: var(--text); }
.link-btn--gh { display: inline-flex; align-items: center; gap: 6px; }
.link-btn--gh svg { width: 15px; height: 15px; fill: currentColor; }

/* ---------- Modals ---------- */
.modal {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel) 0%, var(--panel-2) 100%);
  color: var(--text);
  padding: 0;
  width: min(480px, calc(100vw - 32px));
  box-shadow: var(--shadow);
}
.modal::backdrop { background: rgba(4, 7, 13, 0.62); backdrop-filter: blur(3px); }
.modal__head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 20px; border-bottom: 1px solid var(--line);
}
.modal__head h2 { margin: 0; font-size: 1.05rem; letter-spacing: 0.02em; }
.modal__body { padding: 20px; max-height: 70vh; overflow-y: auto; }
.modal__body p { line-height: 1.5; }
.modal__body .up { color: var(--bull); font-weight: 700; }
.modal__body .down { color: var(--bear); font-weight: 700; }
.modal__body ul { padding-left: 18px; display: flex; flex-direction: column; gap: 8px; line-height: 1.45; margin: 10px 0; }
.modal__body h3 { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-faint); margin: 18px 0 6px; }
.muted { color: var(--text-faint); font-size: 0.84rem; }

.kbd {
  font-family: var(--ff-mono); font-size: 0.8em; background: var(--panel-2);
  border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 6px; padding: 1px 6px;
}

/* ---------- Stats ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; text-align: center; }
.stat { display: flex; flex-direction: column; gap: 4px; }
.stat__num { font-size: 1.7rem; font-weight: 800; font-family: var(--ff-mono); }
.stat__lbl { font-size: 0.66rem; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.08em; }
.dist-title { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-faint); margin: 22px 0 10px; }
.dist { display: flex; flex-direction: column; gap: 6px; }
.dist__row { display: flex; align-items: center; gap: 8px; font-family: var(--ff-mono); font-size: 0.82rem; }
.dist__key { width: 14px; text-align: right; color: var(--text-dim); }
.dist__bar { background: var(--line); border-radius: 5px; height: 22px; min-width: 26px; display: flex; align-items: center; justify-content: flex-end; padding: 0 8px; color: #fff; transition: width .5s ease; }
.dist__bar.is-best { background: var(--bull); }
.dist__bar.is-other { background: var(--accent); }

/* ---------- Result ---------- */
.modal--result { width: min(420px, calc(100vw - 32px)); }
.result-headline { text-align: center; font-size: 1.25rem; font-weight: 800; margin: 4px 0 0; }
.result-score { text-align: center; font-family: var(--ff-mono); font-size: 2.6rem; font-weight: 800; margin: 4px 0 12px; }
.result-grid { text-align: center; font-size: 1.7rem; letter-spacing: 4px; margin-bottom: 16px; }
.result-mini { display: flex; justify-content: center; gap: 18px; margin-bottom: 18px; color: var(--text-dim); font-size: 0.82rem; }
.result-mini strong { color: var(--text); font-family: var(--ff-mono); display: block; font-size: 1.15rem; text-align: center; }
.result-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.next-puzzle { text-align: center; color: var(--text-faint); font-size: 0.8rem; margin: 16px 0 0; }
.mono { font-family: var(--ff-mono); color: var(--text-dim); }

.btn {
  padding: 13px 14px; border-radius: 12px; border: 1px solid var(--line);
  background: var(--panel-2); color: var(--text); font-weight: 700; cursor: pointer;
  font-family: inherit; font-size: 0.95rem; letter-spacing: 0.02em;
  transition: transform .1s ease, border-color .15s ease, background .15s ease;
}
.btn:hover { border-color: var(--text-faint); }
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--bull); border-color: var(--bull); color: #06281c; }
.btn--primary:hover { filter: brightness(1.06); border-color: var(--bull); }

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
  .brand__tag { display: none; }
  .topbar { padding-top: 10px; padding-bottom: 8px; }
  .icon-btn { width: 36px; height: 36px; }
  .call { padding: 13px 10px; }
  .call__label { font-size: 0.95rem; }
  .result-score { font-size: 2.2rem; }
  .meta { flex-direction: column; gap: 6px; }
  .tabs button { padding: 6px 12px; font-size: 0.78rem; }
  .levelbar button { font-size: 0.7rem; padding: 5px 9px; }
  .question { font-size: 0.88rem; }
  .an-row { font-size: 0.8rem; }
  .panel { gap: 11px; }
  .stat__num { font-size: 1.4rem; }
}

/* ---------- Motion preference ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

/* ---------- Focus visibility ---------- */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 6px; }