/* ==========================================================================
   Draw Phase — Yu-Gi-Oh! opening hand odds
   Palette borrows from card frames: gold effect-monster trim, spell teal,
   trap violet. Two themes, one token set.
   ========================================================================== */

:root {
  --font-display: 'Bricolage Grotesque', 'Trebuchet MS', 'Segoe UI', sans-serif;
  --font-body: 'Public Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 18px;

  --wrap: 1180px;
  --ease: cubic-bezier(.22, .68, .36, 1);
}

/* ---------- dark (default) ---------- */
[data-theme='dark'] {
  --bg: #0D0F16;
  --bg-glow: radial-gradient(1100px 620px at 78% -8%, rgba(233,169,60,.13), transparent 62%),
             radial-gradient(820px 520px at 4% 8%, rgba(47,187,168,.10), transparent 60%);
  --surface: #151925;
  --surface-2: #1B2130;
  --surface-3: #232A3C;
  --line: #2A3245;
  --line-soft: #222939;
  --ink: #EDF0F8;
  --ink-2: #B7C0D6;
  --ink-3: #808AA4;
  --accent: #E9A93C;
  --accent-ink: #16191F;
  --accent-soft: rgba(233,169,60,.14);
  --good: #45C08D;
  --warn: #E9A93C;
  --bad: #F0637E;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 18px 46px -22px rgba(0,0,0,.9);
  --card-face: #222A3B;
  --focus: #7FB6FF;

  --c1: #E9A93C; --c2: #35C0AE; --c3: #9A88F2; --c4: #F0637E; --c5: #55A6F0; --c6: #A9CF52;
}

/* ---------- light ---------- */
[data-theme='light'] {
  --bg: #EFF1F7;
  --bg-glow: radial-gradient(1100px 620px at 78% -8%, rgba(196,124,20,.10), transparent 62%),
             radial-gradient(820px 520px at 4% 8%, rgba(29,150,134,.08), transparent 60%);
  --surface: #FFFFFF;
  --surface-2: #F5F7FC;
  --surface-3: #EAEEF6;
  --line: #D7DEEA;
  --line-soft: #E4E9F2;
  --ink: #141824;
  --ink-2: #414B62;
  --ink-3: #6B7590;
  --accent: #B4700C;
  --accent-ink: #FFFFFF;
  --accent-soft: rgba(180,112,12,.10);
  --good: #17835C;
  --warn: #B4700C;
  --bad: #C8324F;
  --shadow: 0 1px 2px rgba(20,30,60,.06), 0 16px 38px -24px rgba(20,30,60,.35);
  --card-face: #E7ECF5;
  --focus: #1F6FEB;

  --c1: #B4700C; --c2: #12897B; --c3: #6248C8; --c4: #C8324F; --c5: #1F6FEB; --c6: #63841A;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background-color: var(--bg);
  background-image: var(--bg-glow);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  transition: background-color .3s var(--ease), color .3s var(--ease);
}

h1, h2, h3 { font-family: var(--font-display); font-weight: 800; letter-spacing: -.02em; margin: 0; }
p { margin: 0; }

.nowrap { white-space: nowrap; }

.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 20;
  padding: 10px 16px; border-radius: var(--r-sm);
  background: var(--accent); color: var(--accent-ink);
  font-weight: 600; text-decoration: none;
  transition: top .18s var(--ease);
}
.skip-link:focus { top: 12px; }

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ==========================================================================
   Header
   ========================================================================== */

.top {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 22px 20px 6px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}

.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }

.brand-mark { width: 40px; height: 40px; flex: none; }
.brand-mark .mk { fill: var(--card-face); stroke: var(--line); stroke-width: 1.2; }
.brand-mark .mk-a { fill: var(--c2); opacity: .85; stroke: none; }
.brand-mark .mk-b { fill: var(--c3); opacity: .85; stroke: none; }
.brand-mark .mk-c { fill: var(--accent); stroke: none; }
.brand-mark .mk-spark { fill: var(--bg); opacity: .92; }

.brand-text { display: flex; flex-direction: column; min-width: 0; }
.brand-name {
  font-family: var(--font-display); font-weight: 800; font-size: 1.06rem;
  letter-spacing: -.02em; line-height: 1.15;
}
.brand-tag {
  font-size: .72rem; letter-spacing: .13em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 600;
}

/* Theme toggle -------------------------------------------------------- */

.theme-toggle {
  flex: none;
  border: 0; padding: 0; background: none; cursor: pointer;
  border-radius: 999px;
}
.theme-toggle-track {
  position: relative; display: flex; align-items: center; justify-content: space-between;
  width: 74px; height: 38px; padding: 0 9px;
  border: 1px solid var(--line); border-radius: 999px;
  background: var(--surface); box-shadow: var(--shadow);
  transition: background-color .3s var(--ease), border-color .3s var(--ease);
}
.theme-toggle-thumb {
  position: absolute; top: 3px; left: 3px;
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 2px 8px -2px rgba(0,0,0,.5);
  transition: transform .34s var(--ease), background-color .3s var(--ease);
}
[data-theme='dark'] .theme-toggle-thumb { transform: translateX(36px); }

.theme-toggle svg {
  position: relative; z-index: 1;
  width: 17px; height: 17px;
  fill: none; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round;
  transition: stroke .3s var(--ease), opacity .3s var(--ease);
}
.icon-sun { stroke: var(--ink-3); }
.icon-moon { stroke: var(--ink-3); }
[data-theme='light'] .icon-sun { stroke: var(--accent-ink); opacity: 1; }
[data-theme='light'] .icon-moon { opacity: .55; }
[data-theme='dark'] .icon-moon { stroke: var(--accent-ink); opacity: 1; }
[data-theme='dark'] .icon-sun { opacity: .55; }

.theme-toggle:hover .theme-toggle-track { border-color: var(--accent); }

/* ==========================================================================
   Intro
   ========================================================================== */

main { max-width: var(--wrap); margin: 0 auto; padding: 0 20px 40px; }

.intro { padding: 30px 0 26px; max-width: 62ch; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: .7rem; letter-spacing: .2em; text-transform: uppercase;
  color: var(--accent); font-weight: 500;
}

.intro h1 {
  font-size: clamp(2.4rem, 7vw, 3.9rem);
  line-height: .98;
  margin: .18em 0 .3em;
}

.lede { color: var(--ink-2); font-size: 1.05rem; max-width: 56ch; }

/* ==========================================================================
   Layout
   ========================================================================== */

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 372px;
  gap: 22px;
  align-items: start;
}

.col-build { display: flex; flex-direction: column; gap: 18px; min-width: 0; }
.col-odds { position: sticky; top: 20px; }

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 22px;
  box-shadow: var(--shadow);
  transition: background-color .3s var(--ease), border-color .3s var(--ease);
}

.panel-head { margin-bottom: 18px; }
.panel h2 { font-size: 1.16rem; }
.panel-note { color: var(--ink-3); font-size: .88rem; margin-top: 3px; }

/* ==========================================================================
   Fields
   ========================================================================== */

.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }

.field label {
  font-size: .72rem; letter-spacing: .1em; text-transform: uppercase;
  font-weight: 600; color: var(--ink-3);
}

input.num, input.text {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 10px 12px;
  transition: border-color .18s var(--ease), background-color .18s var(--ease), box-shadow .18s var(--ease);
}
input.text { font-family: var(--font-body); }

input.num:hover, input.text:hover { border-color: var(--ink-3); }
input.num:focus, input.text:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
  outline: none;
}
input::placeholder { color: var(--ink-3); opacity: .7; }

input.invalid,
input.invalid:hover,
input.invalid:focus {
  border-color: var(--bad);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--bad) 16%, transparent);
}

/* Number spinners are noise on a page this dense */
input[type='number'] { -moz-appearance: textfield; appearance: textfield; }
input[type='number']::-webkit-outer-spin-button,
input[type='number']::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }

.deck-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 2px; }

.chip {
  font-family: var(--font-body);
  font-size: .78rem; font-weight: 600;
  color: var(--ink-2);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 11px;
  cursor: pointer;
  transition: color .16s var(--ease), border-color .16s var(--ease), background-color .16s var(--ease);
}
.chip:hover { color: var(--ink); border-color: var(--accent); }
.chip[aria-pressed='true'] {
  color: var(--accent); border-color: var(--accent); background: var(--accent-soft);
}

/* ==========================================================================
   Card groups
   ========================================================================== */

.group-legend {
  display: grid;
  grid-template-columns: minmax(0,1fr) 78px 78px 78px 34px;
  gap: 10px;
  padding: 0 14px 8px;
  font-size: .68rem; letter-spacing: .1em; text-transform: uppercase;
  font-weight: 600; color: var(--ink-3);
}
.gl-num { text-align: center; }

.groups { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }

.group {
  position: relative;
  display: flex;
  background: var(--surface-2);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  overflow: hidden;
  animation: group-in .32s var(--ease) both;
}
@keyframes group-in {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

.group-spine { width: 5px; flex: none; background: var(--spine, var(--accent)); }

.group-body { flex: 1; min-width: 0; padding: 10px 14px 12px; }

.group-row {
  display: grid;
  grid-template-columns: minmax(0,1fr) 78px 78px 78px 34px;
  gap: 10px;
  align-items: end;
}

.group-row .field label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
.group-row .field-num input { text-align: center; padding-left: 4px; padding-right: 4px; }

.btn-remove {
  width: 34px; height: 40px;
  display: grid; place-items: center;
  border: 1px solid transparent; border-radius: var(--r-sm);
  background: none; color: var(--ink-3); cursor: pointer;
  transition: color .16s var(--ease), background-color .16s var(--ease), border-color .16s var(--ease);
}
.btn-remove svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }
.btn-remove:hover { color: var(--bad); border-color: var(--bad); background: color-mix(in srgb, var(--bad) 10%, transparent); }
.btn-remove[disabled] { opacity: .3; cursor: not-allowed; }
.btn-remove[disabled]:hover { color: var(--ink-3); border-color: transparent; background: none; }

/* The auto-calculated remainder row */
.rest {
  display: grid;
  grid-template-columns: minmax(0,1fr) 78px 78px 78px 34px;
  gap: 10px;
  align-items: center;
  margin-top: 10px;
  padding: 12px 14px 12px 0;
  border: 1px dashed var(--line);
  border-radius: var(--r-md);
  position: relative;
  overflow: hidden;
}
.rest-spine { position: absolute; left: 0; top: 0; bottom: 0; width: 5px; background: var(--line); }
.rest-name { padding-left: 19px; font-size: .92rem; color: var(--ink-3); }
.rest-num {
  text-align: center; font-family: var(--font-mono); font-variant-numeric: tabular-nums;
  font-size: .95rem; color: var(--ink-2);
}
.rest-dim { color: var(--ink-3); opacity: .6; }
.rest-num.bad { color: var(--bad); font-weight: 700; }

.group-actions { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  font-family: var(--font-body); font-size: .88rem; font-weight: 600;
  padding: 10px 16px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: var(--surface-2);
  color: var(--ink);
  cursor: pointer;
  transition: transform .12s var(--ease), border-color .16s var(--ease),
              background-color .16s var(--ease), color .16s var(--ease);
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn:active { transform: translateY(1px); }

.btn-icon { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.btn-add { border-style: dashed; }

.btn-quiet { background: none; color: var(--ink-2); }

.btn-ghost {
  background: none; border-color: var(--line); color: var(--ink-2);
  font-size: .82rem; padding: 7px 13px;
}

.btn-deal {
  background: var(--accent); border-color: var(--accent); color: var(--accent-ink);
}
.btn-deal:hover { background: var(--accent); color: var(--accent-ink); filter: brightness(1.07); }

/* ==========================================================================
   Examples + math
   ========================================================================== */

.disclosure {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  background: none; border: 0; padding: 0; cursor: pointer; color: var(--ink);
  font-family: inherit; text-align: left;
}
.disclosure-chevron {
  width: 20px; height: 20px; flex: none;
  fill: none; stroke: var(--ink-3); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
  transition: transform .26s var(--ease), stroke .16s var(--ease);
}
.disclosure:hover .disclosure-chevron { stroke: var(--accent); }
.disclosure[aria-expanded='true'] .disclosure-chevron { transform: rotate(180deg); }

.examples { margin-top: 18px; display: flex; flex-direction: column; gap: 22px; }
.example p { color: var(--ink-2); font-size: .93rem; }

.example-table {
  width: 100%;
  margin: 12px 0;
  border-collapse: collapse;
  font-size: .88rem;
}
.example-table th {
  text-align: left; font-size: .68rem; letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 600; padding: 0 10px 7px 0;
}
.example-table th + th, .example-table td + td { text-align: center; width: 76px; }
.example-table td {
  padding: 7px 10px 7px 0;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono); font-size: .85rem;
  color: var(--ink-2);
}
.example-table td:first-child { font-family: var(--font-body); color: var(--ink); }

.example-tip { color: var(--ink-3); font-size: .86rem; border-top: 1px solid var(--line-soft); padding-top: 16px; }

.panel-math p { color: var(--ink-2); font-size: .93rem; margin-top: 12px; }
.panel-math em { color: var(--ink); font-style: normal; font-weight: 600; }

/* ==========================================================================
   Odds panel
   ========================================================================== */

.odds-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 22px;
  box-shadow: var(--shadow);
  transition: background-color .3s var(--ease), border-color .3s var(--ease);
}

.odds-figure {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(3rem, 8vw, 4.1rem);
  line-height: 1;
  letter-spacing: -.045em;
  font-variant-numeric: tabular-nums;
  margin: 10px 0 14px;
  color: var(--odds-color, var(--ink));
  transition: color .3s var(--ease);
}
.odds-pct { font-size: .42em; margin-left: .1em; color: var(--ink-3); letter-spacing: 0; }

.odds-card.is-error .odds-pct { display: none; }

.odds-bar {
  height: 8px; border-radius: 999px;
  background: var(--surface-3);
  overflow: hidden;
}
.odds-bar-fill {
  display: block; height: 100%; width: 0;
  border-radius: 999px;
  background: var(--odds-color, var(--accent));
  transition: width .45s var(--ease), background-color .3s var(--ease);
}

.odds-plain {
  margin-top: 12px;
  color: var(--ink-2);
  font-size: .92rem;
  min-height: 2.9em;
}
.odds-plain strong { color: var(--ink); font-weight: 600; }
.odds-card.is-error .odds-plain { color: var(--bad); }

/* Sample hand ---------------------------------------------------------- */

.hand {
  display: flex; gap: 5px; flex-wrap: wrap;
  margin: 18px 0 14px;
  min-height: 74px;
}

.hand-card {
  flex: 1 1 0;
  min-width: 26px; max-width: 46px;
  aspect-ratio: 59 / 86;
  border-radius: 5px;
  border: 1px solid var(--line);
  background: var(--card-face);
  display: grid; place-items: center;
  font-family: var(--font-mono); font-size: .62rem; font-weight: 700;
  color: var(--ink-3);
  overflow: hidden;
  transition: background-color .25s var(--ease), border-color .25s var(--ease), color .25s var(--ease);
}
.hand-card:not(.filled) {
  background-image: repeating-linear-gradient(
    135deg,
    transparent 0 5px,
    color-mix(in srgb, var(--ink-3) 16%, transparent) 5px 6px
  );
}

.hand-card.filled {
  background: color-mix(in srgb, var(--spine) 85%, var(--surface));
  border-color: var(--spine);
  color: var(--surface);
}
.hand-card.dealt { animation: flip-in .38s var(--ease) both; }
@keyframes flip-in {
  from { transform: rotateY(-82deg) translateY(5px); opacity: 0; }
  to { transform: none; opacity: 1; }
}

.deal-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.deal-tally { font-family: var(--font-mono); font-size: .76rem; color: var(--ink-3); }
.deal-tally .hit { color: var(--good); font-weight: 700; }
.deal-tally .miss { color: var(--bad); font-weight: 700; }

/* Per-group breakdown --------------------------------------------------- */

.breakdown { margin-top: 18px; border-top: 1px solid var(--line-soft); padding-top: 16px; }
.breakdown:empty { display: none; }

.bd-title {
  font-size: .68rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 600; margin-bottom: 10px;
}

.bd-row { display: flex; align-items: center; gap: 10px; padding: 6px 0; }
.bd-dot { width: 9px; height: 9px; border-radius: 2px; background: var(--spine); flex: none; }
.bd-name {
  flex: 1; min-width: 0; font-size: .86rem; color: var(--ink-2);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.bd-val {
  font-family: var(--font-mono); font-size: .84rem; font-weight: 500;
  font-variant-numeric: tabular-nums; color: var(--ink);
}

.bd-spark { display: flex; align-items: flex-end; gap: 2px; height: 22px; width: 62px; flex: none; }
.bd-bar {
  flex: 1; background: var(--spine); border-radius: 1.5px; opacity: .32;
  min-height: 2px;
  transition: height .3s var(--ease);
}
.bd-bar.in-range { opacity: 1; }

.share { display: flex; flex-direction: column; gap: 8px; margin-top: 18px; }
.share .btn { width: 100%; }
.share-status { font-size: .78rem; color: var(--good); min-height: 1.3em; margin-top: 8px; }

/* ==========================================================================
   Footer
   ========================================================================== */

.bottom {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 26px 20px 52px;
  border-top: 1px solid var(--line-soft);
}
.made { font-family: var(--font-display); font-weight: 600; font-size: .98rem; color: var(--ink-2); }
.made-name { color: var(--accent); }
.made-note { font-size: .8rem; color: var(--ink-3); margin-top: 4px; }

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 940px) {
  .layout { grid-template-columns: 1fr; }
  .col-odds { position: static; order: -1; }
  .intro { padding-bottom: 20px; }
}

@media (max-width: 620px) {
  main { padding: 0 14px 30px; }
  .top { padding: 16px 14px 4px; }
  .bottom { padding: 24px 14px 44px; }
  .panel, .odds-card { padding: 18px 16px; border-radius: var(--r-md); }

  .deck-grid { grid-template-columns: 1fr; gap: 16px; }

  .group-legend { display: none; }

  .group-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-template-areas:
      'name name remove'
      'amt  min  max';
    gap: 10px;
    align-items: end;
  }
  .group-row .field-name { grid-area: name; }
  .group-row .field-num:nth-of-type(2) { grid-area: amt; }
  .group-row .field-num:nth-of-type(3) { grid-area: min; }
  .group-row .field-num:nth-of-type(4) { grid-area: max; }
  .group-row .btn-remove { grid-area: remove; justify-self: end; }

  /* Labels earn their place back once the header row is gone */
  .group-row .field label {
    position: static; width: auto; height: auto; clip-path: none;
    font-size: .64rem;
  }

  .rest { grid-template-columns: minmax(0,1.7fr) 1fr 1fr 1fr; padding-right: 10px; gap: 6px; }
  .rest .gl-gap { display: none; }
  .rest-name { font-size: .78rem; padding-left: 14px; white-space: nowrap; }
  .rest-num { font-size: .86rem; }
}

/* ==========================================================================
   Motion preferences
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}