/* Gentle Solitaire. Colours follow the Gentle Games palette; the table is a
   classic green felt, or this season's colours. All art is original. */
:root {
  --paper: #14201c; --panel: #1f302a; --ink: #f8f2e7; --muted: #c3cec8;
  --accent: #62cfb5; --accent-ink: #10201b; --focus: #fff1a8; --shadow: rgba(0, 0, 0, .45);
  --felt: #1f5b3e; --felt-edge: #164530; --back-a: #2f5d8a; --back-b: #24476e;
  --card: #fffdf6; --card-edge: #b99a62; --red: #b3261e; --black: #1b2620;
  /* 7 cards across: page gutters (32), table padding (2 x --pad) and 6 gaps. */
  --gap: 8px; --pad: 16px;
  --cw: clamp(36px, calc((min(100vw, 860px) - 32px - 2 * var(--pad) - 6 * var(--gap)) / 7), 104px);
  --ch: calc(var(--cw) * 1.4);
  --down-step: calc(var(--cw) * 0.16);
  --up-step: calc(var(--cw) * 0.3);
  --fan: calc(var(--cw) * 0.26);
  color-scheme: dark;
}
body[data-size="large"] { --cw: clamp(36px, calc((min(100vw, 980px) - 32px - 2 * var(--pad) - 6 * var(--gap)) / 7), 124px); }
@media (max-width: 520px) { :root { --gap: 5px; --pad: 8px; } }
body[data-theme="seasonal"][data-season="spring"] { --felt: #3d6b4a; --felt-edge: #2e543a; --back-a: #6fa862; --back-b: #4a8450; }
body[data-theme="seasonal"][data-season="summer"] { --felt: #4f6a2c; --felt-edge: #3d5322; --back-a: #e8b54a; --back-b: #c9932b; }
body[data-theme="seasonal"][data-season="autumn"] { --felt: #5e3f2a; --felt-edge: #4a3020; --back-a: #b8492b; --back-b: #8a2e14; }
body[data-theme="seasonal"][data-season="winter"] { --felt: #2c4660; --felt-edge: #21374c; --back-a: #9fb8d0; --back-b: #26476e; }

* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: var(--paper); color: var(--ink); font: 17px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; }
h1, h2, h3 { font-family: Georgia, serif; line-height: 1.2; }
main { max-width: 980px; margin: 0 auto; padding: 16px 16px 48px; }
button, select, input { font: inherit; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; left: 16px; top: -60px; padding: 10px 16px; border-radius: 12px; background: var(--accent); color: var(--accent-ink); font-weight: 800; z-index: 10; }
.skip-link:focus { top: 12px; }

.topbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 24px; padding: 8px 0 12px; }
.topbar h1 { margin: 0; font-size: clamp(30px, 5vw, 40px); }
.eyebrow { margin: 0; font-size: 14px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); }
.topbar-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.round-button, .quiet-button, .primary-button { min-height: 44px; padding: 0 18px; border-radius: 999px; border: 2px solid var(--accent); background: transparent; color: var(--ink); font-weight: 700; cursor: pointer; }
.primary-button { background: var(--accent); color: var(--accent-ink); font-weight: 800; }
.round-button:hover, .quiet-button:hover { background: color-mix(in srgb, var(--accent) 16%, transparent); }
button:disabled { opacity: .55; cursor: not-allowed; }
.key { display: inline-block; min-width: 1.6em; margin-left: 6px; padding: 0 5px; border-radius: 6px; background: color-mix(in srgb, var(--ink) 14%, transparent); font-size: 14px; }

.status-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 16px; margin-bottom: 8px; }
.status-row p { margin: 0; }
.mode-label { font-weight: 800; }
.score-label { color: var(--muted); }

/* The table: seven columns wide, with the stock, waste and foundations above. */
.table { padding: var(--pad); border-radius: 24px; background: radial-gradient(ellipse at 50% 30%, var(--felt), var(--felt-edge)); }
.top-row, .tableau { display: grid; grid-template-columns: repeat(7, var(--cw)); justify-content: space-between; gap: var(--gap); }
.top-row { margin-bottom: 18px; }
.stock-area { grid-column: 1 / 4; display: flex; gap: var(--gap); }
.foundations { grid-column: 4 / 8; display: grid; grid-template-columns: repeat(4, var(--cw)); justify-content: space-between; gap: var(--gap); }

.pile { position: relative; width: var(--cw); height: var(--ch); padding: 0; border: 0; border-radius: 10px; background: transparent; color: inherit; cursor: pointer; }
.pile--waste { width: calc(var(--cw) + var(--fan) * 2); }
.pile--column { height: calc(var(--ch) + var(--down-step) * var(--downs, 0) + var(--up-step) * var(--ups, 0)); min-height: var(--ch); }
.pile-empty { position: absolute; inset: 0; display: grid; place-items: center; border: 2px dashed color-mix(in srgb, var(--ink) 45%, transparent); border-radius: 10px; color: color-mix(in srgb, var(--ink) 55%, transparent); font: 700 calc(var(--cw) * 0.34)/1 Georgia, serif; }
.pile--hint { box-shadow: 0 0 0 4px var(--focus); }

/* A card. Rank and suit sit in two corners, so a card reads the same either way up. */
.card { position: absolute; left: 0; top: 0; width: var(--cw); height: var(--ch); border-radius: 9px; border: 1.5px solid var(--card-edge); background: var(--card); color: var(--black); box-shadow: 0 2px 5px var(--shadow); font-family: Georgia, serif; user-select: none; }
.card--red { color: var(--red); }
body[data-colors="four"] .card--diamonds { color: #1f5fae; }
body[data-colors="four"] .card--clubs { color: #1f7a3a; }
.card-corner { position: absolute; top: 3px; left: 5px; font-size: calc(var(--cw) * 0.27); font-weight: 700; line-height: 1; white-space: nowrap; }
.card-corner--bottom { top: auto; left: auto; bottom: 3px; right: 5px; transform: rotate(180deg); }
.card-middle { position: absolute; inset: 0; display: grid; place-items: center; font-size: calc(var(--cw) * 0.5); line-height: 1; }
.card--back { background: repeating-linear-gradient(45deg, var(--back-a) 0 6px, var(--back-b) 6px 12px); border: 3px solid var(--card); }
.card--movable { touch-action: none; }
.pile--waste .card, .pile--foundation .card { touch-action: none; }
.card--selected { box-shadow: 0 0 0 3px var(--focus), 0 6px 14px var(--shadow); transform: translateY(-4px); }
.card--lifted { opacity: .35; }
.drag-ghost { position: fixed; left: 0; top: 0; z-index: 20; width: var(--cw); pointer-events: none; }
.drag-ghost .card { box-shadow: 0 10px 24px var(--shadow); }
@media (max-width: 520px) { .card-middle { font-size: calc(var(--cw) * 0.42); } .card-corner { font-size: calc(var(--cw) * 0.3); } }

.prompt { margin: 14px 0 0; min-height: 1.5em; text-align: center; font-weight: 700; }
.notice { margin: 12px auto 0; max-width: 560px; padding: 14px 18px; border-radius: 16px; background: var(--panel); text-align: center; }
.notice[hidden] { display: none; }
.notice p { margin: 0 0 10px; }
.notice-actions, .actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }
.actions { margin-top: 14px; }
.actions [hidden] { display: none; }

.celebration { position: fixed; inset: 0; z-index: 30; width: 100vw; height: 100vh; cursor: pointer; }
.celebration[hidden] { display: none; }

.dialog { width: min(560px, calc(100vw - 32px)); max-height: calc(100vh - 32px); padding: 0; border: 0; border-radius: 24px; background: var(--panel); color: var(--ink); box-shadow: 0 16px 48px var(--shadow); }
.dialog::backdrop { background: rgba(10, 16, 14, .6); }
.dialog-body { display: flex; flex-direction: column; gap: 14px; padding: 24px; }
.dialog-body h2 { margin: 0; font-size: 26px; }
.dialog-body h3 { margin: 6px 0 0; }
.dialog-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 10px; }
fieldset { margin: 0; padding: 10px 16px; border: 1px solid color-mix(in srgb, var(--muted) 50%, transparent); border-radius: 16px; display: flex; flex-direction: column; gap: 4px; }
legend { padding: 0 6px; font-weight: 800; }
.choice { display: flex; gap: 10px; align-items: flex-start; min-height: 44px; padding-top: 10px; }
.choice input { width: 20px; height: 20px; margin: 3px 0 0; accent-color: var(--accent); flex: none; }
.field { display: flex; flex-direction: column; gap: 4px; font-weight: 700; }
.field select { min-height: 44px; padding: 0 12px; border-radius: 12px; border: 2px solid var(--muted); background: var(--paper); color: var(--ink); font-weight: 400; }
/* Drawn by hand so every browser shows the same thing: the filled part of the
   track is exactly the volume the label says (--fill, set by the game). */
.field input[type="range"] { -webkit-appearance: none; appearance: none; width: 100%; height: 44px; margin: 0; background: transparent; cursor: pointer; }
.field input[type="range"]::-webkit-slider-runnable-track { height: 8px; border-radius: 999px; background: linear-gradient(to right, var(--accent) var(--fill, 20%), var(--paper) var(--fill, 20%)); border: 1px solid var(--muted); }
.field input[type="range"]::-moz-range-track { height: 8px; border-radius: 999px; background: linear-gradient(to right, var(--accent) var(--fill, 20%), var(--paper) var(--fill, 20%)); border: 1px solid var(--muted); }
.field input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 24px; height: 24px; margin-top: -9px; border-radius: 50%; background: var(--accent); border: 3px solid var(--ink); }
.field input[type="range"]::-moz-range-thumb { width: 18px; height: 18px; border-radius: 50%; background: var(--accent); border: 3px solid var(--ink); }
.field input[type="range"]:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 8px; }
.field output { font-weight: 400; color: var(--muted); }
.settings-note { margin: 0; font-size: 14px; line-height: 1.45; color: var(--muted); }
.rules { margin: 0; padding-left: 22px; display: flex; flex-direction: column; gap: 6px; }
.keys { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; margin: 0; }
.keys dt { font-weight: 800; }
.keys dd { margin: 0; }

body[data-motion="reduced"] * { transition: none !important; animation: none !important; }
body[data-motion="reduced"] .card--selected { transform: none; }