:root {
  color-scheme: light;
  --page: #f5f7fb;
  --surface: #ffffff;
  --surface-soft: #f0f4fa;
  --surface-strong: #e8edf6;
  --ink: #142039;
  --ink-soft: #4e5c73;
  --muted: #748198;
  --line: #dce3ed;
  --line-strong: #aeb9ca;
  --primary: #3159d9;
  --primary-dark: #2446b2;
  --primary-soft: #e9eeff;
  --green: #2eaa78;
  --green-soft: #e4f7ef;
  --amber: #d89326;
  --amber-soft: #fff3d8;
  --red: #cf4b5d;
  --red-soft: #ffe8eb;
  --shadow-sm: 0 2px 10px rgba(20, 32, 57, 0.06);
  --shadow-md: 0 14px 38px rgba(20, 32, 57, 0.10);
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --max: 1180px;
  --header-height: 64px;
  --cell-size: 36px;
  --row-clue-width: 68px;
  --column-clue-height: 68px;
  --grid-pixels: 360px;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #101523;
  --surface: #171e2e;
  --surface-soft: #1d2639;
  --surface-strong: #252f44;
  --ink: #f4f7fd;
  --ink-soft: #c7d0df;
  --muted: #98a5ba;
  --line: #303b50;
  --line-strong: #57647a;
  --primary: #7894ff;
  --primary-dark: #9db0ff;
  --primary-soft: #283456;
  --green: #58c998;
  --green-soft: #17392e;
  --amber: #f0b65a;
  --amber-soft: #40331e;
  --red: #ff7a8b;
  --red-soft: #47232a;
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.18);
  --shadow-md: 0 16px 42px rgba(0, 0, 0, 0.30);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 18px); }
body { margin: 0; min-width: 320px; background: var(--page); color: var(--ink); line-height: 1.6; }
body, button, input, select, textarea { font: inherit; }
button, input, select, textarea { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
img { display: block; max-width: 100%; }
a { color: var(--primary-dark); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--primary); }
p, h1, h2, h3, ul, ol { margin-top: 0; }
h1, h2, h3 { color: var(--ink); letter-spacing: -0.035em; line-height: 1.12; }
h1 { font-size: clamp(2.2rem, 6vw, 4.55rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.65rem); }
h3 { font-size: 1.1rem; }
::selection { background: var(--primary); color: #fff; }
:focus-visible { outline: 3px solid color-mix(in srgb, var(--primary) 52%, transparent); outline-offset: 3px; }
.sr-only { position: absolute !important; width: 1px !important; height: 1px !important; padding: 0 !important; margin: -1px !important; overflow: hidden !important; clip: rect(0, 0, 0, 0) !important; white-space: nowrap !important; border: 0 !important; }
.is-hidden, [hidden] { display: none !important; }
.skip-link { position: fixed; z-index: 1000; top: 8px; left: 8px; transform: translateY(-160%); padding: 10px 16px; border-radius: var(--radius-sm); background: var(--ink); color: var(--surface); font-weight: 800; }
.skip-link:focus { transform: translateY(0); }

.site-header { position: sticky; z-index: 50; top: 0; min-height: var(--header-height); border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--surface) 92%, transparent); backdrop-filter: blur(16px); }
.header-inner { display: flex; align-items: center; gap: 30px; width: min(calc(100% - 32px), var(--max)); height: var(--header-height); margin: auto; }
.brand { flex: 0 0 auto; border-radius: var(--radius-sm); }
.brand img { width: 174px; height: auto; }
:root[data-theme="dark"] .brand { padding: 3px 7px; background: #fff; }
:root[data-theme="dark"] .footer-brand img { padding: 5px 8px; border-radius: var(--radius-sm); background: #fff; }
.desktop-nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.desktop-nav a { padding: 8px 11px; border-radius: var(--radius-sm); color: var(--ink-soft); font-size: 0.91rem; font-weight: 700; text-decoration: none; }
.desktop-nav a:hover, .desktop-nav a.is-current { background: var(--surface-soft); color: var(--ink); }
.header-actions { display: flex; align-items: center; gap: 8px; }
.icon-button, .menu-button { display: inline-grid; place-items: center; width: 40px; height: 40px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); }
.icon-button:hover, .menu-button:hover { border-color: var(--line-strong); background: var(--surface-soft); }
.icon-button span { font-size: 1.1rem; }
.menu-button { display: none; padding: 9px; gap: 4px; }
.menu-button > span:not(.sr-only) { display: block; width: 19px; height: 2px; background: var(--ink); }
.mobile-nav { display: none; }

.hero { position: relative; overflow: hidden; }
.compact-hero { padding: clamp(66px, 9vw, 110px) 20px clamp(42px, 7vw, 76px); background: radial-gradient(circle at 10% 0%, color-mix(in srgb, var(--primary) 10%, transparent), transparent 32%), radial-gradient(circle at 90% 20%, color-mix(in srgb, var(--green) 9%, transparent), transparent 29%); }
.hero-copy { width: min(900px, 100%); margin: auto; text-align: center; }
.eyebrow, .section-kicker, .dialog-kicker { margin-bottom: 15px; color: var(--primary-dark); font-size: 0.75rem; font-weight: 850; letter-spacing: 0.13em; text-transform: uppercase; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; }
.eyebrow span { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 5px color-mix(in srgb, var(--green) 16%, transparent); }
.hero h1 { max-width: 900px; margin: 0 auto 22px; }
.hero-lead { max-width: 740px; margin: 0 auto 28px; color: var(--ink-soft); font-size: clamp(1rem, 2vw, 1.2rem); }
.hero-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; }
.button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; gap: 8px; padding: 10px 18px; border: 1px solid transparent; border-radius: 8px; font-weight: 800; line-height: 1.2; text-decoration: none; transition: transform 160ms ease, background 160ms ease, border-color 160ms ease; }
.button:hover { transform: translateY(-1px); text-decoration: none; }
.button.primary { background: var(--primary); color: #fff; box-shadow: 0 8px 22px color-mix(in srgb, var(--primary) 22%, transparent); }
.button.primary:hover { background: var(--primary-dark); color: #fff; }
.button.secondary { border-color: var(--line-strong); background: var(--surface); color: var(--ink); }
.button.secondary:hover, .button.ghost:hover { border-color: var(--primary); background: var(--primary-soft); color: var(--primary-dark); }
.button.ghost { border-color: var(--line); background: transparent; color: var(--ink-soft); }
.button.small { min-height: 38px; padding: 7px 12px; font-size: 0.86rem; }
.button.full-width { width: 100%; }
.trust-list { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px 20px; margin: 24px 0 0; padding: 0; color: var(--muted); font-size: 0.84rem; font-weight: 700; list-style: none; }
.trust-list li::before { content: "✓"; margin-right: 6px; color: var(--green); font-weight: 900; }

.section-shell { width: min(calc(100% - 32px), var(--max)); margin: auto; }
.narrow-shell { max-width: 980px; }
.game-section { padding: 10px 0 86px; }
.game-app { border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); box-shadow: var(--shadow-md); overflow: hidden; }
.game-topbar { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; padding: 24px 26px 17px; border-bottom: 1px solid var(--line); }
.game-topbar h2 { margin: 0 0 7px; font-size: clamp(1.55rem, 3vw, 2.1rem); }
.game-topbar .section-kicker { margin-bottom: 6px; }
.game-date { margin: 0; color: var(--muted); font-size: 0.89rem; }
.game-controls { display: flex; align-items: flex-end; justify-content: space-between; gap: 28px; padding: 15px 26px; border-bottom: 1px solid var(--line); background: var(--surface-soft); }
.segmented { min-width: 0; margin: 0; padding: 0; border: 0; }
.segmented legend { margin-bottom: 7px; color: var(--muted); font-size: 0.7rem; font-weight: 850; letter-spacing: 0.08em; text-transform: uppercase; }
.segmented button { min-width: 77px; padding: 7px 12px; border: 1px solid var(--line); border-right-width: 0; background: var(--surface); color: var(--ink-soft); }
.segmented button:first-of-type { border-radius: var(--radius-sm) 0 0 var(--radius-sm); }
.segmented button:last-of-type { border-right-width: 1px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.segmented button:hover { background: var(--primary-soft); }
.segmented button.is-active { position: relative; z-index: 1; border-color: var(--primary); border-right-width: 1px; background: var(--primary); color: #fff; }
.segmented button.is-active + button { border-left-width: 0; }
.segmented strong, .segmented small { display: block; }
.segmented strong { font-size: 0.86rem; }
.segmented small { margin-top: 1px; color: inherit; font-size: 0.65rem; opacity: 0.73; }
.validation-selector button { min-width: 103px; }
.game-layout { display: grid; grid-template-columns: minmax(0, 1fr) 315px; align-items: start; gap: 20px; padding: 24px; }
.board-card { min-width: 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); overflow: hidden; box-shadow: var(--shadow-sm); }
.stats-strip { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--line); background: var(--surface-soft); }
.stats-strip > div { min-width: 0; padding: 12px 10px; border-right: 1px solid var(--line); text-align: center; }
.stats-strip > div:last-child { border-right: 0; }
.stats-strip span, .completion-stats span { display: block; margin-bottom: 2px; color: var(--muted); font-size: 0.65rem; font-weight: 850; letter-spacing: 0.08em; text-transform: uppercase; }
.stats-strip strong { display: block; overflow: hidden; font-family: ui-monospace, "SFMono-Regular", Consolas, monospace; font-size: clamp(0.9rem, 2vw, 1.05rem); text-overflow: ellipsis; white-space: nowrap; }
#stat-mistakes { color: var(--red); letter-spacing: 0.05em; }
.game-app[data-validation-mode="relaxed"] #stat-mistakes { color: var(--ink); }
.board-viewport { position: relative; width: 100%; overflow: auto; padding: 24px; background: linear-gradient(135deg, color-mix(in srgb, var(--surface-soft) 75%, transparent), var(--surface)); scrollbar-color: var(--line-strong) transparent; }
.picross-board { position: relative; display: grid; grid-template-columns: var(--row-clue-width) var(--grid-pixels); grid-template-rows: var(--column-clue-height) var(--grid-pixels); width: calc(var(--row-clue-width) + var(--grid-pixels)); min-width: max-content; margin: 0 auto; border: 1px solid var(--line-strong); background: var(--surface); user-select: none; }
.board-corner { display: grid; place-items: center; border-right: 2px solid var(--line-strong); border-bottom: 2px solid var(--line-strong); color: var(--muted); font-family: ui-monospace, monospace; font-weight: 800; }
.column-clues { display: grid; height: var(--column-clue-height); border-bottom: 2px solid var(--line-strong); }
.column-clue { display: flex; min-width: 0; flex-direction: column; justify-content: flex-end; align-items: center; gap: 0; padding: 5px 1px; border-right: 1px solid var(--line); color: var(--ink); font-family: ui-monospace, "SFMono-Regular", Consolas, monospace; font-size: clamp(0.61rem, 1.5vw, 0.78rem); font-weight: 800; line-height: 1.18; }
.column-clue:last-child { border-right: 0; }
.row-clues { display: grid; width: var(--row-clue-width); border-right: 2px solid var(--line-strong); }
.row-clue { display: flex; min-height: 0; justify-content: flex-end; align-items: center; gap: 5px; padding: 1px 8px; border-bottom: 1px solid var(--line); color: var(--ink); font-family: ui-monospace, "SFMono-Regular", Consolas, monospace; font-size: clamp(0.61rem, 1.5vw, 0.78rem); font-weight: 800; line-height: 1; }
.row-clue:last-child { border-bottom: 0; }
.column-clue.is-solved, .row-clue.is-solved { background: var(--green-soft); color: var(--green); opacity: 0.78; text-decoration: line-through; }
.picross-cells { display: grid; width: var(--grid-pixels); height: var(--grid-pixels); touch-action: none; }
.picross-cell { position: relative; display: grid; width: var(--cell-size); height: var(--cell-size); min-width: 0; min-height: 0; place-items: center; padding: 0; border: 0; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); border-radius: 0; background: var(--surface); color: var(--ink-soft); font-family: ui-monospace, monospace; font-size: clamp(0.7rem, 2vw, 1.05rem); font-weight: 900; line-height: 1; }
.has-guides .picross-cell.guide-right { border-right: 2px solid var(--line-strong); }
.has-guides .picross-cell.guide-bottom { border-bottom: 2px solid var(--line-strong); }
.column-clue.is-focus, .row-clue.is-focus { background: var(--primary-soft); color: var(--primary-dark); }
.picross-cell:hover, .picross-cell.is-line-focus { background: var(--primary-soft); }
.picross-cell.is-filled { background: var(--ink); color: var(--ink); box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--surface) 17%, transparent); }
.picross-cell.is-crossed { color: var(--muted); }
.picross-cell.is-error { z-index: 2; animation: cell-error 520ms ease; background: var(--red-soft); color: var(--red); box-shadow: inset 0 0 0 2px var(--red); }
.picross-cell.is-hint { z-index: 2; animation: cell-hint 900ms ease; box-shadow: inset 0 0 0 3px var(--amber); }
.picross-cell.reveal-0, .completion-art .reveal-0 { background: #3159d9; }
.picross-cell.reveal-1, .completion-art .reveal-1 { background: #2eaa78; }
.picross-cell.reveal-2, .completion-art .reveal-2 { background: #e7a234; }
.picross-cell.reveal-3, .completion-art .reveal-3 { background: #d65f77; }
.game-app[data-edition="pokemon"] .picross-cell.reveal-0, .game-app[data-edition="pokemon"] .completion-art .reveal-0 { background: #e53935; }
.game-app[data-edition="pokemon"] .picross-cell.reveal-1, .game-app[data-edition="pokemon"] .completion-art .reveal-1 { background: #f7f8fb; }
.game-app[data-edition="pokemon"] .picross-cell.reveal-2, .game-app[data-edition="pokemon"] .completion-art .reveal-2 { background: #202938; }
.game-app[data-edition="pokemon"] .picross-cell.reveal-3, .game-app[data-edition="pokemon"] .completion-art .reveal-3 { background: #f2c94c; }
.game-app[data-edition="pikachu"] .picross-cell.reveal-0, .game-app[data-edition="pikachu"] .completion-art .reveal-0 { background: #f7cf32; }
.game-app[data-edition="pikachu"] .picross-cell.reveal-1, .game-app[data-edition="pikachu"] .completion-art .reveal-1 { background: #ffdf5d; }
.game-app[data-edition="pikachu"] .picross-cell.reveal-2, .game-app[data-edition="pikachu"] .completion-art .reveal-2 { background: #2b2b31; }
.game-app[data-edition="pikachu"] .picross-cell.reveal-3, .game-app[data-edition="pikachu"] .completion-art .reveal-3 { background: #e5483f; }
.pause-overlay { position: absolute; z-index: 8; inset: calc(var(--column-clue-height) + 1px) 0 0 calc(var(--row-clue-width) + 1px); display: none; place-items: center; align-content: center; gap: 8px; background: color-mix(in srgb, var(--surface) 93%, transparent); backdrop-filter: blur(9px); }
.pause-overlay.is-visible { display: grid; }
.pause-overlay > span { display: grid; width: 42px; height: 42px; place-items: center; border-radius: 50%; background: var(--primary-soft); color: var(--primary); font-weight: 900; }
.tool-dock { display: flex; justify-content: center; gap: 8px; padding: 14px 16px 9px; border-top: 1px solid var(--line); background: var(--surface); }
.tool-button { display: grid; grid-template-columns: 23px auto; grid-template-rows: auto auto; align-items: center; column-gap: 7px; min-width: 106px; padding: 7px 11px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); color: var(--ink-soft); text-align: left; }
.tool-button:hover { border-color: var(--line-strong); background: var(--surface-soft); }
.tool-button.is-active { border-color: var(--primary); background: var(--primary-soft); color: var(--primary-dark); box-shadow: inset 0 0 0 1px var(--primary); }
.tool-button .tool-symbol { grid-row: 1 / 3; display: grid; width: 22px; height: 22px; place-items: center; font-size: 1.25rem; font-weight: 900; }
.fill-symbol { width: 14px !important; height: 14px !important; margin: 4px; border: 2px solid currentColor; background: currentColor; }
.tool-button strong { font-size: 0.8rem; line-height: 1.2; }
.tool-button small { color: var(--muted); font-size: 0.62rem; line-height: 1.2; }
.board-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 5px; padding: 7px 12px 13px; background: var(--surface); }
.board-actions button { padding: 6px 9px; border: 0; border-radius: var(--radius-sm); background: transparent; color: var(--ink-soft); font-size: 0.75rem; font-weight: 750; }
.board-actions button:hover:not(:disabled) { background: var(--surface-soft); color: var(--ink); }
.board-actions button:disabled { cursor: not-allowed; opacity: 0.38; }
.game-status { min-height: 40px; margin: 0; padding: 10px 16px; border-top: 1px solid var(--line); background: var(--surface-soft); color: var(--ink-soft); font-size: 0.76rem; text-align: center; }
.game-status.is-error { color: var(--red); }
.game-sidebar { display: grid; gap: 12px; }
.side-card { padding: 17px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.side-card-heading { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.side-card-heading > p { margin: 0; color: var(--ink-soft); font-size: 0.78rem; font-weight: 750; }
.live-dot { width: 8px; height: 8px; margin-right: auto; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px var(--green-soft); }
.countdown { display: block; margin: 9px 0 5px; font-family: ui-monospace, "SFMono-Regular", Consolas, monospace; font-size: 1.5rem; letter-spacing: -0.05em; }
.daily-card > p { margin-bottom: 9px; color: var(--muted); font-size: 0.76rem; }
.daily-card > a, .feature-card a { font-size: 0.78rem; font-weight: 800; }
.streak-card { background: linear-gradient(135deg, var(--primary-soft), var(--surface)); }
.streak-card > div { display: flex; align-items: center; gap: 12px; }
.streak-icon { display: grid; width: 38px; height: 38px; place-items: center; border-radius: 50%; background: var(--primary); color: #fff; }
.streak-card p { margin: 0; color: var(--muted); font-size: 0.72rem; }
.streak-card strong { font-size: 1rem; }
.text-button, .link-button { padding: 0; border: 0; background: transparent; color: var(--primary-dark); font-size: 0.74rem; font-weight: 800; text-decoration: underline; text-underline-offset: 3px; }
.streak-card .text-button { margin-top: 12px; }
.leaderboard-card { padding: 0; overflow: hidden; }
.leaderboard-card .side-card-heading { padding: 15px 15px 10px; }
.leaderboard-card h3 { margin: 0; font-size: 0.95rem; }
.leaderboard-card .side-card-heading span { padding: 3px 6px; border-radius: 4px; background: var(--surface-soft); color: var(--muted); font-size: 0.65rem; font-weight: 800; }
.table-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.72rem; }
th, td { padding: 7px 8px; border-top: 1px solid var(--line); text-align: right; white-space: nowrap; }
th:nth-child(2), td:nth-child(2) { max-width: 96px; overflow: hidden; text-align: left; text-overflow: ellipsis; }
thead th { color: var(--muted); font-size: 0.62rem; letter-spacing: 0.04em; text-transform: uppercase; }
tbody th { color: var(--ink); font-weight: 750; }
.table-empty { padding: 20px 12px; color: var(--muted); text-align: center !important; white-space: normal; }
.fine-print { margin: 0; padding: 9px 14px 12px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.64rem; }
.leaderboard-link { margin: 0; padding: 0 14px 12px; font-size: 0.7rem; font-weight: 800; }
.leaderboard-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.leaderboard-panel { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.leaderboard-panel:first-child { grid-column: 1 / -1; }
.leaderboard-panel h2 { margin: 0; padding: 18px 18px 14px; border-bottom: 1px solid var(--line); font-size: 1.15rem; }
.edition-cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 28px; }
.edition-card { padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.edition-card h2 { margin-bottom: 10px; font-size: 1.45rem; }
.edition-card p { color: var(--ink-soft); }

.ad-slot.is-disabled { display: none; }
.content-section { padding: clamp(70px, 9vw, 118px) 0; }
.content-section + .content-section { border-top: 1px solid var(--line); }
.tinted-section { background: var(--surface-soft); }
.section-intro { max-width: 680px; margin-bottom: 32px; color: var(--ink-soft); font-size: 1.02rem; }
.feature-grid { display: grid; gap: 14px; }
.three-columns { grid-template-columns: repeat(3, 1fr); }
.feature-card { position: relative; min-height: 220px; padding: 25px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.feature-card h3 { margin: 23px 0 10px; font-size: 1.2rem; }
.feature-card p { color: var(--ink-soft); font-size: 0.9rem; }
.feature-number { color: var(--primary); font-family: ui-monospace, monospace; font-size: 0.72rem; font-weight: 850; letter-spacing: 0.08em; }
.split-content { display: grid; grid-template-columns: minmax(0, 0.82fr) minmax(380px, 1fr); align-items: center; gap: clamp(50px, 9vw, 120px); }
.split-content > div > p:not(.section-kicker) { color: var(--ink-soft); }
.step-list { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; }
.step-list li { display: grid; grid-template-columns: 42px 1fr; gap: 16px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.step-list li:first-child { border-top: 1px solid var(--line); }
.step-list > li > span { display: grid; width: 38px; height: 38px; place-items: center; border-radius: 50%; background: var(--primary); color: #fff; font-family: ui-monospace, monospace; font-weight: 900; }
.step-list strong { display: block; margin-bottom: 4px; }
.step-list p { margin: 0; color: var(--ink-soft); font-size: 0.87rem; }
.archive-promo { display: grid; grid-template-columns: 1fr 420px; align-items: center; gap: clamp(40px, 9vw, 110px); padding: clamp(30px, 5vw, 58px); border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); box-shadow: var(--shadow-sm); }
.archive-promo > div:first-child > p:not(.section-kicker) { color: var(--ink-soft); }
.mini-calendar { display: grid; grid-template-columns: repeat(7, 1fr); gap: 5px; padding: 24px; border: 1px solid var(--line); background: var(--surface-soft); }
.mini-calendar span { color: var(--muted); font-size: 0.63rem; font-weight: 800; text-align: center; }
.mini-calendar i { display: grid; aspect-ratio: 1; place-items: center; border: 1px solid var(--line); border-radius: 4px; background: var(--surface); font-size: 0.75rem; font-style: normal; }
.mini-calendar i.done { background: var(--green-soft); color: var(--green); }
.mini-calendar i.today { border-color: var(--primary); background: var(--primary); color: #fff; }
.faq-section h2 { margin-bottom: 32px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { position: relative; padding: 20px 44px 20px 0; color: var(--ink); font-weight: 800; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 4px; top: 15px; color: var(--primary); font-size: 1.35rem; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { max-width: 780px; padding: 0 44px 20px 0; margin: 0; color: var(--ink-soft); font-size: 0.9rem; }

.app-dialog { width: min(calc(100% - 30px), 570px); max-height: min(88vh, 780px); padding: 30px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); color: var(--ink); box-shadow: var(--shadow-md); overflow: auto; }
.app-dialog::backdrop { background: rgba(9, 15, 28, 0.66); backdrop-filter: blur(4px); }
.dialog-close { position: absolute; top: 12px; right: 12px; display: grid; width: 36px; height: 36px; place-items: center; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface-soft); color: var(--ink-soft); font-size: 1.2rem; }
.dialog-kicker { margin-bottom: 7px; }
.app-dialog h2 { margin-bottom: 20px; font-size: 1.8rem; }
.app-dialog h3 { margin: 22px 0 8px; }
.completion-art { display: grid; width: min(280px, 72vw); aspect-ratio: 1; margin: 0 auto 22px; border: 1px solid var(--line-strong); background: var(--surface-soft); }
.completion-art span { border: 1px solid color-mix(in srgb, var(--surface) 22%, transparent); }
.completion-stats, .profile-stats { display: grid; grid-template-columns: repeat(4, 1fr); margin-bottom: 18px; border: 1px solid var(--line); }
.completion-stats > div, .profile-stats > div { min-width: 0; padding: 10px 7px; border-right: 1px solid var(--line); text-align: center; }
.completion-stats > div:last-child, .profile-stats > div:last-child { border-right: 0; }
.completion-stats strong { font-family: ui-monospace, monospace; font-size: 0.84rem; }
.inline-status { min-height: 22px; margin: 7px 0 0; color: var(--muted); font-size: 0.72rem; text-align: center; }
.leaderboard-form { margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--line); }
.leaderboard-form h3 { margin: 0; }
.leaderboard-form > p { margin-bottom: 12px; color: var(--muted); font-size: 0.77rem; }
.leaderboard-form label { display: block; margin-bottom: 5px; font-size: 0.74rem; font-weight: 800; }
.leaderboard-form > div { display: grid; grid-template-columns: 1fr auto; gap: 7px; }
input, select, textarea { border: 1px solid var(--line-strong); border-radius: var(--radius-sm); background: var(--surface); }
input { min-width: 0; padding: 10px 12px; }
.compact-dialog { max-width: 450px; text-align: center; }
.dialog-icon { display: grid; width: 56px; height: 56px; place-items: center; margin: 0 auto 14px; border-radius: 50%; background: var(--red-soft); color: var(--red); font-size: 1.7rem; }
.dialog-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.settings-list { display: grid; border-top: 1px solid var(--line); }
.settings-list label { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 15px 0; border-bottom: 1px solid var(--line); }
.settings-list strong, .settings-list small { display: block; }
.settings-list strong { font-size: 0.88rem; }
.settings-list small { margin-top: 2px; color: var(--muted); font-size: 0.7rem; }
.settings-list input[type="checkbox"] { width: 20px; height: 20px; accent-color: var(--primary); }
.settings-list select { padding: 7px 9px; }
.profile-stats strong, .profile-stats span { display: block; }
.profile-stats strong { font-family: ui-monospace, monospace; font-size: 1.1rem; }
.profile-stats span { margin-top: 3px; color: var(--muted); font-size: 0.62rem; }
.achievement-list { display: grid; gap: 7px; padding: 0; list-style: none; }
.achievement { display: flex; align-items: center; gap: 12px; padding: 10px; border: 1px solid var(--line); border-radius: var(--radius-sm); color: var(--muted); opacity: 0.65; }
.achievement.is-unlocked { border-color: color-mix(in srgb, var(--green) 50%, var(--line)); background: var(--green-soft); color: var(--green); opacity: 1; }
.achievement > span { font-size: 1.25rem; }
.achievement strong, .achievement small { display: block; }
.achievement strong { color: var(--ink); font-size: 0.82rem; }
.achievement small { font-size: 0.68rem; }

.page-hero { padding: clamp(54px, 8vw, 94px) 0 clamp(42px, 6vw, 68px); border-bottom: 1px solid var(--line); background: var(--surface); }
.page-hero .section-shell { max-width: 920px; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 23px; color: var(--muted); font-size: 0.73rem; }
.breadcrumbs a { color: var(--ink-soft); }
.page-hero h1 { max-width: 880px; margin-bottom: 20px; font-size: clamp(2.2rem, 6vw, 4rem); }
.page-hero .lead { max-width: 760px; margin-bottom: 0; color: var(--ink-soft); font-size: clamp(1rem, 2vw, 1.15rem); }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 250px; align-items: start; gap: 70px; }
.article-body { max-width: 760px; }
.article-body h2 { margin: 58px 0 17px; font-size: clamp(1.55rem, 4vw, 2.2rem); }
.article-body h2:first-child { margin-top: 0; }
.article-body h3 { margin: 31px 0 10px; font-size: 1.25rem; }
.article-body p, .article-body li { color: var(--ink-soft); }
.article-body li + li { margin-top: 8px; }
.article-body strong { color: var(--ink); }
.article-aside { position: sticky; top: calc(var(--header-height) + 22px); padding: 18px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.article-aside h2 { margin-bottom: 12px; font-size: 0.78rem; letter-spacing: 0.06em; text-transform: uppercase; }
.article-aside a { display: block; padding: 6px 0; color: var(--ink-soft); font-size: 0.78rem; font-weight: 700; }
.callout { margin: 25px 0; padding: 19px 21px; border-left: 4px solid var(--primary); background: var(--primary-soft); }
.callout p:last-child { margin-bottom: 0; }
.logic-example { display: grid; grid-template-columns: 110px 1fr; align-items: center; gap: 20px; margin: 24px 0; padding: 20px; border: 1px solid var(--line); background: var(--surface); }
.logic-line { display: grid; grid-template-columns: repeat(10, 1fr); border: 1px solid var(--line-strong); }
.logic-line span { aspect-ratio: 1; border-right: 1px solid var(--line); background: var(--surface-soft); }
.logic-line span:last-child { border-right: 0; }
.logic-line span.is-filled { background: var(--ink); }

.archive-summary { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 25px; }
.summary-chip { padding: 8px 12px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); color: var(--ink-soft); font-size: 0.78rem; font-weight: 700; }
.archive-calendar { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.archive-month { padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.archive-month h2 { margin-bottom: 17px; font-size: 1.18rem; }
.archive-weekdays, .archive-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; }
.archive-weekdays { margin-bottom: 5px; }
.archive-weekdays span { color: var(--muted); font-size: 0.58rem; font-weight: 800; text-align: center; text-transform: uppercase; }
.archive-day, .archive-blank { display: grid; aspect-ratio: 1; place-items: center; border: 1px solid var(--line); border-radius: 4px; background: var(--surface-soft); color: var(--ink-soft); font-size: 0.73rem; font-weight: 750; text-decoration: none; }
.archive-day { position: relative; }
.archive-day:hover { border-color: var(--primary); background: var(--primary-soft); color: var(--primary-dark); }
.archive-day.is-unavailable { opacity: 0.3; }
.archive-day.is-today { border-color: var(--primary); background: var(--primary); color: #fff; }
.archive-day.is-completed:not(.is-today) { background: var(--green-soft); color: var(--green); }
.archive-day small { position: absolute; top: 1px; right: 3px; font-size: 0.5rem; }

.solver-app { display: grid; grid-template-columns: minmax(0, 1fr) minmax(300px, 0.8fr); gap: 22px; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.solver-form { min-width: 0; }
.solver-form > label { display: block; margin-bottom: 7px; font-size: 0.78rem; font-weight: 800; }
.solver-form select { width: 100%; margin-bottom: 16px; padding: 10px; }
.solver-inputs { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.solver-inputs label { color: var(--ink-soft); font-size: 0.73rem; font-weight: 800; }
.solver-inputs textarea { width: 100%; min-height: 250px; margin-top: 6px; padding: 10px 12px; font-family: ui-monospace, "SFMono-Regular", Consolas, monospace; line-height: 1.5; resize: vertical; }
.solver-actions { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 12px; }
.solver-result { display: grid; min-height: 380px; place-items: center; align-content: center; padding: 22px; border: 1px solid var(--line); background: var(--surface-soft); }
.solver-output { display: grid; max-width: 100%; border: 2px solid var(--line-strong); }
.solver-cell { aspect-ratio: 1; border: 1px solid var(--line); background: var(--surface); }
.solver-cell.is-filled { background: var(--primary); }
.solver-status { margin: 17px 0 0; color: var(--ink-soft); font-size: 0.8rem; text-align: center; }
.solver-status.is-error { color: var(--red); }

.legal-page { min-height: 65vh; }
.legal-page .article-body { max-width: 820px; }

.site-footer { border-top: 1px solid var(--line); background: var(--surface); }
.footer-inner { display: grid; grid-template-columns: minmax(270px, 1.5fr) repeat(3, minmax(130px, 0.6fr)); gap: 44px; width: min(calc(100% - 32px), var(--max)); margin: auto; padding: 55px 0 42px; }
.footer-brand img { width: 176px; }
.footer-brand p { max-width: 350px; margin: 17px 0 0; color: var(--muted); font-size: 0.82rem; }
.footer-inner nav h2 { margin-bottom: 13px; font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; }
.footer-inner nav a, .footer-inner .link-button { display: block; margin: 8px 0; color: var(--ink-soft); font-size: 0.76rem; font-weight: 650; text-align: left; text-decoration: none; }
.footer-inner nav a:hover { color: var(--primary); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; width: min(calc(100% - 32px), var(--max)); margin: auto; padding: 16px 0 23px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.69rem; }
.footer-bottom p { margin: 0; }

@keyframes cell-error { 0%, 100% { transform: translateX(0); } 25% { transform: translateX(-3px); } 55% { transform: translateX(3px); } }
@keyframes cell-hint { 0%, 100% { transform: scale(1); } 50% { transform: scale(0.82); } }

@media (max-width: 1020px) {
  .game-layout { grid-template-columns: minmax(0, 1fr) 270px; padding: 18px; }
  .game-controls { align-items: stretch; flex-direction: column; gap: 13px; }
  .segmented { overflow-x: auto; padding-bottom: 2px; white-space: nowrap; }
  .split-content { gap: 50px; }
  .archive-promo { grid-template-columns: 1fr 340px; }
}

@media (max-width: 860px) {
  .desktop-nav { display: none; }
  .menu-button { display: grid; }
  .header-actions { margin-left: auto; }
  .mobile-nav.is-open { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; padding: 8px 16px 15px; border-top: 1px solid var(--line); background: var(--surface); }
  .mobile-nav a { padding: 10px; border-radius: var(--radius-sm); color: var(--ink-soft); font-size: 0.82rem; font-weight: 750; text-decoration: none; }
  .mobile-nav a:hover { background: var(--surface-soft); }
  .game-layout { grid-template-columns: 1fr; }
  .game-sidebar { grid-template-columns: 1fr 1fr; }
  .leaderboard-card { grid-row: span 2; }
  .split-content, .archive-promo { grid-template-columns: 1fr; }
  .mini-calendar { max-width: 420px; }
  .three-columns { grid-template-columns: 1fr; }
  .leaderboard-grid, .edition-cards { grid-template-columns: 1fr; }
  .leaderboard-panel:first-child { grid-column: auto; }
  .feature-card { min-height: 0; }
  .article-layout { grid-template-columns: 1fr; gap: 40px; }
  .article-aside { position: static; order: -1; }
  .archive-calendar { grid-template-columns: 1fr; }
  .solver-app { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 600px) {
  :root { --header-height: 58px; }
  .header-inner { width: min(calc(100% - 22px), var(--max)); height: var(--header-height); }
  .brand img { width: 150px; }
  .icon-button, .menu-button { width: 38px; height: 38px; }
  .compact-hero { padding: 45px 17px 35px; }
  .hero h1 { margin-bottom: 16px; font-size: clamp(2rem, 10vw, 2.75rem); }
  .hero-lead { font-size: 0.96rem; }
  .hero-actions { display: grid; grid-template-columns: 1fr; }
  .hero-actions .button { width: 100%; }
  .trust-list { justify-content: flex-start; gap: 6px 15px; text-align: left; }
  .section-shell { width: min(calc(100% - 20px), var(--max)); }
  .game-section { padding: 5px 0 58px; }
  .game-app { width: 100%; border-radius: var(--radius); }
  .game-topbar { padding: 18px 15px 14px; }
  .game-topbar .button { width: 40px; min-height: 40px; overflow: hidden; padding: 8px; font-size: 0; }
  .game-topbar .button span { font-size: 1rem; }
  .game-controls { padding: 12px 14px; }
  .segmented { margin-right: -14px; padding-right: 14px; }
  .segmented button { min-width: 70px; padding: 6px 9px; }
  .validation-selector button { min-width: 108px; }
  .game-layout { gap: 12px; padding: 0; }
  .board-card { border-right: 0; border-left: 0; border-radius: 0; box-shadow: none; }
  .stats-strip > div { padding: 9px 5px; }
  .stats-strip span { font-size: 0.56rem; }
  .stats-strip strong { font-size: 0.82rem; }
  .board-viewport { padding: 14px 10px; }
  .picross-board { margin: 0 auto; }
  .tool-dock { position: sticky; z-index: 15; bottom: 0; gap: 5px; padding: 9px 8px; border-top-color: var(--line-strong); box-shadow: 0 -5px 16px rgba(20, 32, 57, 0.08); }
  .tool-button { grid-template-columns: 20px auto; min-width: 0; flex: 1; padding: 7px 6px; column-gap: 5px; }
  .tool-button small { display: none; }
  .tool-button strong { font-size: 0.72rem; }
  .tool-button .tool-symbol { width: 18px; height: 18px; font-size: 1rem; }
  .board-actions { gap: 0; padding: 6px 5px 10px; }
  .board-actions button { padding: 7px 6px; font-size: 0.68rem; }
  .game-status { font-size: 0.69rem; }
  .game-sidebar { grid-template-columns: 1fr; padding: 0 10px 12px; }
  .leaderboard-card { grid-row: auto; }
  .content-section { padding: 64px 0; }
  .archive-promo { padding: 24px 18px; }
  .mini-calendar { padding: 13px; }
  .split-content { gap: 34px; }
  .app-dialog { padding: 25px 18px; }
  .completion-stats, .profile-stats { grid-template-columns: 1fr 1fr; }
  .completion-stats > div:nth-child(2), .profile-stats > div:nth-child(2) { border-right: 0; }
  .completion-stats > div:nth-child(-n+2), .profile-stats > div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .leaderboard-form > div { grid-template-columns: 1fr; }
  .page-hero { padding: 43px 0; }
  .article-body h2 { margin-top: 43px; }
  .logic-example { grid-template-columns: 1fr; }
  .archive-month { padding: 14px; }
  .solver-app { padding: 14px; }
  .solver-inputs { grid-template-columns: 1fr; }
  .solver-inputs textarea { min-height: 180px; }
  .solver-result { min-height: 300px; padding: 12px; }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 30px; padding: 42px 0 35px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; gap: 5px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

@media (forced-colors: active) {
  .picross-cell.is-filled { background: CanvasText; }
  .picross-cell.is-crossed span { color: CanvasText; }
}