/* Theme system: every color the UI (and the SVG board) uses comes from the custom properties below, keyed off data-theme on . "system" is resolved to light/dark before first paint by the inline script in the page-head template block, so no flash of the wrong theme. */ :root, :root[data-theme="light"] { color-scheme: light; --bg: #f4f5f7; --surface: #ffffff; --surface-2: #eef0f3; --text: #191b1f; --muted: #667085; --border: #e0e4e9; --accent: #4f46e5; --accent-hover: #4338ca; --accent-text: #ffffff; --danger: #b42318; --win: #067647; --loss: #b42318; --shadow: 0 1px 2px rgba(16, 24, 40, 0.06), 0 4px 16px rgba(16, 24, 40, 0.06); --board-light: #eeeed2; --board-dark: #769656; --board-highlight: #f6c453; --board-lastmove: rgba(246, 196, 83, 0.45); --piece-white: #ffffff; --piece-white-outline: #3d3d3d; --piece-black: #1f1f1f; --piece-black-outline: rgba(255, 255, 255, 0.55); } :root[data-theme="dark"] { color-scheme: dark; --bg: #16181d; --surface: #1f2229; --surface-2: #262a33; --text: #e7e9ee; --muted: #9aa3b2; --border: #333845; --accent: #818cf8; --accent-hover: #a5b0ff; --accent-text: #14161b; --danger: #f97066; --win: #4ade80; --loss: #f97066; --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 6px 20px rgba(0, 0, 0, 0.35); --board-light: #f0d9b5; --board-dark: #b58863; --board-highlight: #ffd75e; --board-lastmove: rgba(255, 215, 94, 0.4); --piece-white: #f8f8f8; --piece-white-outline: #2b2b2b; --piece-black: #1c1c1c; --piece-black-outline: rgba(255, 255, 255, 0.6); } :root[data-theme="midnight"] { color-scheme: dark; --bg: #0b0e14; --surface: #12161f; --surface-2: #1a1f2b; --text: #dbe4f0; --muted: #8494ab; --border: #232b3b; --accent: #38bdf8; --accent-hover: #7dd3fc; --accent-text: #06121a; --danger: #fb7185; --win: #34d399; --loss: #fb7185; --shadow: 0 1px 2px rgba(0, 0, 0, 0.5), 0 8px 24px rgba(0, 0, 0, 0.5); --board-light: #8fa3bd; --board-dark: #45556e; --board-highlight: #38bdf8; --board-lastmove: rgba(56, 189, 248, 0.32); --piece-white: #f2f6fb; --piece-white-outline: #1c2430; --piece-black: #14181f; --piece-black-outline: rgba(226, 236, 248, 0.65); } :root[data-theme="forest"] { color-scheme: dark; --bg: #101710; --surface: #182118; --surface-2: #1f2b1f; --text: #e2ecdf; --muted: #93a58f; --border: #2b3a2a; --accent: #6ee7a0; --accent-hover: #9af0bd; --accent-text: #0b160d; --danger: #f4a26a; --win: #6ee7a0; --loss: #f4a26a; --shadow: 0 1px 2px rgba(0, 0, 0, 0.45), 0 6px 20px rgba(0, 0, 0, 0.4); --board-light: #d9e4c8; --board-dark: #5b7c4f; --board-highlight: #f2d15c; --board-lastmove: rgba(242, 209, 92, 0.42); --piece-white: #fbfcf8; --piece-white-outline: #26301f; --piece-black: #1a2016; --piece-black-outline: rgba(240, 248, 232, 0.6); } :root[data-theme="ocean"] { color-scheme: dark; --bg: #0c1524; --surface: #122036; --surface-2: #182a45; --text: #dde9f7; --muted: #85a0c0; --border: #223a5c; --accent: #60a5fa; --accent-hover: #93c5fd; --accent-text: #081221; --danger: #fda4af; --win: #5eead4; --loss: #fda4af; --shadow: 0 1px 2px rgba(0, 0, 0, 0.45), 0 8px 24px rgba(2, 8, 20, 0.5); --board-light: #cfdde9; --board-dark: #6688aa; --board-highlight: #ffd75e; --board-lastmove: rgba(255, 215, 94, 0.4); --piece-white: #f5f9fd; --piece-white-outline: #1d2b3d; --piece-black: #131c28; --piece-black-outline: rgba(222, 236, 250, 0.6); } /* --- board styles --- */ /* User-selectable board palette, independent of the UI theme, via data-board on (persisted as chess_board in localStorage). "Auto" = attribute absent, keeping the theme's own board colors above. These blocks sit after the theme blocks so the equal-specificity override wins the cascade. */ :root[data-board="green"] { --board-light: #eeeed2; --board-dark: #769656; } :root[data-board="walnut"] { --board-light: #f0d9b5; --board-dark: #b58863; } :root[data-board="slate"] { --board-light: #8fa3bd; --board-dark: #45556e; } :root[data-board="forest"] { --board-light: #d9e4c8; --board-dark: #5b7c4f; } :root[data-board="ice"] { --board-light: #cfdde9; --board-dark: #6688aa; } :root[data-board="purple"] { --board-light: #e6e0ec; --board-dark: #9c8ab5; } /* --- base --- */ * { box-sizing: border-box; } body { font-family: system-ui, -apple-system, "Segoe UI", sans-serif; margin: 0; background: var(--bg); color: var(--text); line-height: 1.5; -webkit-font-smoothing: antialiased; } .wrap { max-width: 40rem; margin: 0 auto; padding: 1.25rem 1rem 3rem; } h1 { font-size: 1.45rem; margin: 0 0 0.35rem; letter-spacing: -0.01em; } h2 { font-size: 1.05rem; margin: 0 0 0.5rem; } p.lede { color: var(--muted); margin: 0 0 1.25rem; font-size: 0.95rem; } a { color: var(--accent); text-decoration: none; } a:hover { text-decoration: underline; } /* --- topbar --- */ .topbar { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 0.6rem 1rem; background: color-mix(in srgb, var(--surface) 88%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); } .topbar .brand { font-weight: 700; font-size: 1.05rem; color: var(--text); text-decoration: none; letter-spacing: -0.01em; } .topbar .brand:hover { color: var(--accent); } .theme-picker, .board-picker { display: flex; align-items: center; gap: 0.4rem; margin: 0; font-size: 0.8rem; font-weight: 600; color: var(--muted); } .theme-picker select, .board-picker select { width: auto; margin-top: 0; padding: 0.3rem 0.5rem; font-size: 0.85rem; } .board-picker { margin-left: auto; } /* --- cards & forms --- */ .card { background: var(--surface); border: 1px solid var(--border); border-radius: 0.75rem; box-shadow: var(--shadow); padding: 1.25rem; margin-top: 1.25rem; } label { display: block; margin-top: 0.85rem; font-weight: 600; font-size: 0.875rem; } input, select { font-size: 0.95rem; font-family: inherit; color: var(--text); background: var(--surface-2); border: 1px solid var(--border); border-radius: 0.5rem; padding: 0.5rem 0.65rem; margin-top: 0.3rem; width: 100%; transition: border-color 0.15s, box-shadow 0.15s; } input:focus, select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent); } button { font-size: 0.95rem; font-family: inherit; font-weight: 600; color: var(--text); background: var(--surface-2); border: 1px solid var(--border); border-radius: 0.5rem; padding: 0.5rem 1rem; cursor: pointer; transition: background 0.15s, border-color 0.15s, transform 0.05s; } button:hover { border-color: var(--accent); } button:active { transform: translateY(1px); } button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); } button.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); } button.danger { color: var(--danger); } button.danger:hover { border-color: var(--danger); } /* --- tables --- */ table { border-collapse: collapse; width: 100%; margin-top: 0.5rem; } th, td { text-align: left; padding: 0.5rem 0.65rem; border-bottom: 1px solid var(--border); } tr:last-child td { border-bottom: none; } th { color: var(--muted); font-weight: 600; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.04em; } .win { color: var(--win); font-weight: 600; } .loss { color: var(--loss); font-weight: 600; } .draw { color: var(--muted); } /* --- lobby --- */ #mm-status { margin-top: 0.85rem; font-weight: 600; min-height: 1.5rem; } /* --- bot picker --- */ .bot-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(7.5rem, 1fr)); gap: 0.5rem; margin-top: 1rem; } .bot-card { display: flex; flex-direction: column; align-items: center; gap: 0.15rem; padding: 0.65rem 0.5rem; text-align: center; line-height: 1.2; } .bot-card:hover { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, var(--surface-2)); } .bot-card:disabled { opacity: 0.5; cursor: wait; } .bot-elo { font-size: 1.15rem; font-weight: 700; font-variant-numeric: tabular-nums; color: var(--accent); } .bot-name { font-size: 0.72rem; font-weight: 600; color: var(--muted); } #bot-status { margin-top: 0.85rem; font-weight: 600; min-height: 1.5rem; } #links { margin-top: 1.25rem; padding: 1rem; background: var(--surface-2); border-radius: 0.5rem; display: none; } #links a { display: block; margin-top: 0.5rem; word-break: break-all; } /* --- play page --- */ .play-wrap { max-width: 34rem; } #clocks { display: flex; justify-content: space-between; gap: 1rem; font-variant-numeric: tabular-nums; font-size: 1.15rem; margin: 0.75rem 0; } #clocks > div { flex: 1; background: var(--surface-2); border: 1px solid var(--border); border-radius: 0.5rem; padding: 0.4rem 0.75rem; color: var(--muted); } #clocks .active { color: var(--win); font-weight: 700; } #board { display: block; width: 100%; max-width: 480px; height: auto; border-radius: 0.5rem; box-shadow: var(--shadow); touch-action: none; user-select: none; } #board .square { cursor: pointer; } #board .square.sq-light { fill: var(--board-light); } #board .square.sq-dark { fill: var(--board-dark); } #board .sel-highlight { stroke: var(--board-highlight); } #board .last-move { fill: var(--board-lastmove); pointer-events: none; } #board .piece { cursor: grab; } #board .piece.dragging { cursor: grabbing; } #board .piece-w { fill: var(--piece-white); stroke: var(--piece-white-outline); stroke-width: 1.1; paint-order: stroke; } #board .piece-b { fill: var(--piece-black); stroke: var(--piece-black-outline); stroke-width: 1.1; paint-order: stroke; } #board .promo-cell { fill: var(--surface); stroke: var(--border); } #status { font-weight: 600; margin: 0.65rem 0; min-height: 1.5rem; } #controls { margin-top: 0.5rem; display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; } details { margin-top: 0.75rem; } details summary { cursor: pointer; color: var(--muted); font-size: 0.875rem; } #move-form { display: flex; gap: 0.5rem; margin-top: 0.5rem; } #move-form input { margin-top: 0; flex: 1; } #moves { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.875rem; white-space: pre-wrap; background: var(--surface-2); border: 1px solid var(--border); padding: 0.65rem 0.75rem; border-radius: 0.5rem; max-height: 8rem; overflow-y: auto; margin-top: 0.75rem; min-height: 2.5rem; }