/* ============================================================
   MKS Bridge — Senior-friendly design system
   Shared by mksbridge.com (static site) and play.mksbridge.com
   (BEN frontend). Loaded on every page. Single source of truth.

   Goals:
   - Legibility first. 20px body, 24-40px headings.
   - Warm off-white background (less glare than pure white).
   - Near-black text. Deep indigo accent. Classic red/black suits.
   - Big tap targets (min 48px). Atkinson Hyperlegible font.
   - No decorative noise. No dark mode.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Atkinson+Hyperlegible:wght@400;700&display=swap');

:root {
  /* surface + text */
  --mks-bg:          #f7f5f0;   /* warm off-white */
  --mks-surface:     #ffffff;
  --mks-surface-2:   #f0ece5;
  --mks-surface-3:   #e8e3d9;
  --mks-border:      #c9c4ba;
  --mks-border-dk:   #8a8579;

  --mks-text:        #1a1a1a;
  --mks-text-2:      #3a3a3a;
  --mks-text-dim:    #5f5a50;
  --mks-text-faint:  #8a8579;

  /* accent + states */
  --mks-accent:      #1d4ed8;   /* deep readable blue */
  --mks-accent-dk:   #1e3a8a;
  --mks-accent-soft: #dbeafe;
  --mks-success:     #15803d;
  --mks-success-soft:#dcfce7;
  --mks-warn:        #b45309;
  --mks-warn-soft:   #fef3c7;
  --mks-danger:      #b91c1c;
  --mks-danger-soft: #fee2e2;

  /* suits (classic two-color) */
  --mks-red:         #c0252b;
  --mks-black:       #111111;

  /* aliases for legacy selectors */
  --color-bg:         var(--mks-bg);
  --color-surface:    var(--mks-surface);
  --color-surface-2:  var(--mks-surface-2);
  --color-border:     var(--mks-border);
  --color-text:       var(--mks-text);
  --color-text-dim:   var(--mks-text-dim);
  --color-accent:     var(--mks-accent);
  --text:             var(--mks-text);
  --text-dim:         var(--mks-text-dim);
  --accent:           var(--mks-accent);
}

* { box-sizing: border-box; }

html, body {
  background: var(--mks-bg);
  color: var(--mks-text);
  font-family: 'Atkinson Hyperlegible', 'Verdana', 'Tahoma', sans-serif;
  font-size: 20px;
  line-height: 1.55;
  margin: 0;
}

/* ---------- Type ---------- */

h1, h2, h3, h4 {
  font-family: inherit;
  color: var(--mks-text);
  font-weight: 700;
  letter-spacing: 0;
  margin: 0;
}
h1 { font-size: 40px; line-height: 1.2; margin: 0 0 12px; }
h2 { font-size: 28px; line-height: 1.25; margin: 32px 0 16px; color: var(--mks-accent-dk); }
h3 { font-size: 22px; line-height: 1.3; margin: 20px 0 10px; }

p { margin: 0 0 16px; }

a {
  color: var(--mks-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}
a:hover { color: var(--mks-accent-dk); }

small, .small { font-size: 16px; color: var(--mks-text-dim); }

/* ---------- Layout ---------- */

.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}
.wrap-narrow {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}

.breadcrumb {
  font-size: 16px;
  color: var(--mks-text-dim);
  margin-bottom: 24px;
}
.breadcrumb a { color: var(--mks-text-dim); }
.breadcrumb .sep { color: var(--mks-text-faint); margin: 0 8px; }

.subtitle {
  font-size: 18px;
  color: var(--mks-text-dim);
  margin: 0 0 24px;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  min-height: 52px;
  border-radius: 10px;
  border: 2px solid var(--mks-accent-dk);
  background: var(--mks-accent);
  color: #fff !important;
  font-family: inherit;
  font-size: 18px;
  font-weight: 700;
  text-decoration: none !important;
  cursor: pointer;
  box-shadow: 0 2px 4px rgba(0,0,0,0.12);
  transition: transform 80ms, box-shadow 80ms, background 80ms;
}
.btn:hover {
  background: var(--mks-accent-dk);
  color: #fff !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(29,78,216,0.3);
}
.btn:focus-visible { outline: 3px solid var(--mks-warn); outline-offset: 2px; }
.btn:disabled, .btn[disabled] {
  background: var(--mks-surface-3) !important;
  color: var(--mks-text-faint) !important;
  border-color: var(--mks-border) !important;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.btn-big {
  padding: 20px 36px;
  min-height: 72px;
  font-size: 22px;
  border-radius: 12px;
}

.btn-ghost {
  background: var(--mks-surface);
  color: var(--mks-accent) !important;
  border-color: var(--mks-accent);
}
.btn-ghost:hover {
  background: var(--mks-accent-soft);
  color: var(--mks-accent-dk) !important;
}

.btn-quiet {
  background: transparent;
  color: var(--mks-text-dim) !important;
  border: 2px solid var(--mks-border);
  box-shadow: none;
}
.btn-quiet:hover {
  background: var(--mks-surface-2);
  color: var(--mks-text) !important;
  border-color: var(--mks-border-dk);
}

/* ---------- Cards / Panels ---------- */

.panel {
  background: var(--mks-surface);
  border: 2px solid var(--mks-border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.hero {
  background: var(--mks-surface);
  border: 2px solid var(--mks-accent);
  border-radius: 14px;
  padding: 32px;
  margin-bottom: 32px;
  box-shadow: 0 4px 12px rgba(29,78,216,0.1);
}

/* ---------- Stats row ---------- */

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.stat {
  background: var(--mks-surface);
  border: 2px solid var(--mks-border);
  border-radius: 10px;
  padding: 18px 20px;
}
.stat-label {
  font-size: 15px;
  color: var(--mks-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}
.stat-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--mks-text);
  line-height: 1;
}
.stat-note {
  font-size: 15px;
  color: var(--mks-text-dim);
  margin-top: 6px;
}

/* ---------- Practice tile grid ---------- */

.tiles {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.tile {
  background: var(--mks-surface);
  border: 2px solid var(--mks-border);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color 100ms, box-shadow 100ms;
}
.tile.played {
  border-color: var(--mks-success);
  background: var(--mks-success-soft);
}
.tile.unavailable {
  background: var(--mks-surface-2);
  opacity: 0.8;
}
.tile-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}
.tile-num {
  font-size: 28px;
  font-weight: 700;
  color: var(--mks-text);
}
.tile-mark {
  font-size: 22px;
  color: var(--mks-success);
}
.tile-info {
  font-size: 17px;
  color: var(--mks-text-2);
  line-height: 1.5;
}
.tile-info .label {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 6px;
  background: var(--mks-accent-soft);
  color: var(--mks-accent-dk);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.04em;
  margin-right: 4px;
}
.tile-contract { font-weight: 700; color: var(--mks-text); font-size: 18px; }
.tile-result {
  font-size: 15px;
  color: var(--mks-text-dim);
}
.tile .btn { margin-top: auto; }

/* ---------- Tables (scorecard, rankings, traveller) ---------- */

table.data {
  width: 100%;
  border-collapse: collapse;
  background: var(--mks-surface);
  font-size: 17px;
}
table.data th {
  background: var(--mks-accent-soft);
  color: var(--mks-accent-dk);
  border: 1px solid var(--mks-border);
  font-weight: 700;
  padding: 10px 12px;
  text-align: left;
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
table.data td {
  border: 1px solid var(--mks-border);
  padding: 10px 12px;
  color: var(--mks-text);
}
table.data tr:nth-child(even) td { background: var(--mks-surface-2); }
table.data tr.highlight td { background: var(--mks-warn-soft); }
table.data a { color: var(--mks-accent); font-weight: 700; }

/* Compact numeric table (e.g. rankings, boards list) */
table.data td.num, table.data th.num { text-align: right; font-variant-numeric: tabular-nums; }
table.data td.pos, table.data td.neg { font-weight: 700; }
table.data td.pos { color: var(--mks-success); }
table.data td.neg { color: var(--mks-danger); }

/* ---------- Suits ---------- */

.suit-s, .suit-c { color: var(--mks-black); }
.suit-h, .suit-d { color: var(--mks-red); }

/* ---------- Board diagram (compass) ---------- */

.board-diagram {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-areas:
    ".    north ."
    "west center east"
    ".    south .";
  gap: 12px;
  max-width: 560px;
  margin: 16px auto 24px;
  font-size: 20px;
}
.bd-hand {
  background: var(--mks-surface);
  border: 2px solid var(--mks-border);
  border-radius: 10px;
  padding: 12px 16px;
  font-variant-numeric: tabular-nums;
}
.bd-hand.active {
  border-color: var(--mks-accent);
  box-shadow: 0 0 0 2px var(--mks-accent-soft);
}
.bd-hand .seat {
  font-weight: 700;
  font-size: 14px;
  color: var(--mks-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}
.bd-hand .suit-line { font-size: 18px; line-height: 1.5; white-space: nowrap; }
.bd-north { grid-area: north; }
.bd-south { grid-area: south; }
.bd-east  { grid-area: east;  }
.bd-west  { grid-area: west;  }
.bd-center {
  grid-area: center;
  background: var(--mks-accent-soft);
  border: 2px solid var(--mks-accent);
  border-radius: 10px;
  padding: 16px;
  text-align: center;
  display: flex; flex-direction: column; justify-content: center;
}
.bd-center .bd-num { font-size: 28px; font-weight: 700; color: var(--mks-accent-dk); }
.bd-center .bd-meta { font-size: 15px; color: var(--mks-text-2); margin-top: 4px; }

/* ---------- Mode toggle ---------- */

.segmented {
  display: inline-flex;
  border: 2px solid var(--mks-border-dk);
  border-radius: 10px;
  overflow: hidden;
  background: var(--mks-surface);
}
.segmented button {
  padding: 12px 20px;
  border: none;
  background: transparent;
  color: var(--mks-text-dim);
  font-family: inherit;
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
  border-right: 2px solid var(--mks-border-dk);
  min-height: 48px;
}
.segmented button:last-child { border-right: none; }
.segmented button.active {
  background: var(--mks-accent);
  color: #fff;
}
.segmented button:not(.active):hover {
  background: var(--mks-accent-soft);
  color: var(--mks-accent-dk);
}

/* ---------- Forms ---------- */

input, textarea, select {
  background: var(--mks-surface);
  color: var(--mks-text);
  border: 2px solid var(--mks-border-dk);
  border-radius: 8px;
  font-family: inherit;
  font-size: 18px;
  padding: 10px 14px;
  min-height: 48px;
}
input:focus, textarea:focus, select:focus {
  outline: 3px solid var(--mks-accent);
  outline-offset: 2px;
  border-color: var(--mks-accent);
}

label { display: block; font-size: 16px; color: var(--mks-text-dim); margin-bottom: 6px; }

/* ---------- Utilities ---------- */

.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.row-between { display: flex; gap: 16px; justify-content: space-between; align-items: center; flex-wrap: wrap; }
.stack > * + * { margin-top: 14px; }
.muted { color: var(--mks-text-dim); }
.chip {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--mks-accent-soft);
  color: var(--mks-accent-dk);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.chip-ns { background: #e0f2fe; color: #075985; }
.chip-ew { background: #fef3c7; color: #92400e; }
.chip-good { background: var(--mks-success-soft); color: #14532d; }
.chip-bad  { background: var(--mks-danger-soft);  color: #7f1d1d; }

details.collapse > summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 18px;
  color: var(--mks-accent);
  padding: 12px;
  border: 2px solid var(--mks-border);
  border-radius: 10px;
  background: var(--mks-surface);
  list-style: none;
}
details.collapse > summary::-webkit-details-marker { display: none; }
details.collapse > summary::before { content: '▸ '; display: inline-block; transition: transform 120ms; }
details.collapse[open] > summary::before { transform: rotate(90deg); }
details.collapse[open] > summary { margin-bottom: 12px; }

/* ---------- Focus ---------- */

*:focus-visible { outline: 3px solid var(--mks-accent); outline-offset: 2px; }

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------- Print sanity ---------- */

@media print {
  body { background: #fff; }
  .btn, .segmented, details.collapse > summary { display: none; }
  details.collapse > *:not(summary) { display: block !important; }
}