/* がんばれ！ミユビシギ — about page. A beach birdwatching notebook: graph paper,
   handwritten headings, and the game's screens framed as postage stamps (the
   game itself is drawn as a stamp on a mount). Colours are the game's. */
:root {
  --deep: #1f6e9c; --mid: #3fa3bd; --shal: #6ecfcf; --foam: #f4fffc;
  --dry: #ecd9a6; --dry2: #f4e6bf; --wet: #c9a86c; --wet2: #b8945c;
  --bird: #aeb3ac; --bird2: #7f847d; --ink: #3b2f23; --brown: #8a5f35;
  --food: #ff7e5a; --food2: #ffb38f; --warn: #ff5a48;
  --paper: #f7f0dc; --grid: #e6dbbd; --margin: #e8b0a3; --mount: #16222d;
  --jp: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', sans-serif;
  --hand: 'Zen Kurenaido', 'Noto Sans JP', sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--paper); }
body {
  margin: 0; color: var(--ink); font: 400 16px/1.95 var(--jp); letter-spacing: .03em;
  background-color: var(--paper);
  background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 24px 24px;
}
img { display: block; width: 100%; height: auto; image-rendering: pixelated; }
a { color: var(--deep); }
figure { margin: 0; }
.wrap { width: min(1040px, 100% - 44px); margin: 0 auto; }
@media (max-width: 480px) { .wrap { width: calc(100% - 32px); } }

/* notebook headings: a date-stamp style label and a handwritten title */
.label { display: inline-block; font: 700 11px/1 var(--jp); letter-spacing: .22em; color: var(--brown); border: 1px solid var(--brown); border-radius: 3px; padding: 5px 9px 4px; margin-bottom: 14px; background: rgba(247, 240, 220, .9); }
h2 { font: 400 clamp(27px, 4.2vw, 38px)/1.35 var(--hand); color: var(--ink); margin: 0 0 22px; }
h2 .hl { color: var(--deep); background: linear-gradient(transparent 62%, rgba(110, 207, 207, .45) 62%); }
h3 { font: 700 17px/1.5 var(--jp); color: var(--ink); margin: 0 0 6px; }
p { margin: 0 0 1em; }
section { padding: 76px 0; }
kbd { display: inline-block; min-width: 22px; padding: 1px 6px; margin: 0 2px 2px 0; text-align: center; font: 700 13px/1.5 var(--jp); color: var(--ink); background: var(--dry2); border: 1px solid var(--wet); border-radius: 4px; box-shadow: 0 2px 0 var(--wet); }

/* a sheet of paper taped on the page */
.note { background: #fffdf4; border: 1px solid var(--grid); box-shadow: 0 10px 24px rgba(59, 47, 35, .12); padding: 22px 24px; position: relative; }
.note::before { content: ""; position: absolute; left: 50%; top: -11px; width: 90px; height: 22px; transform: translateX(-50%) rotate(-2deg); background: rgba(110, 207, 207, .45); }
.note p { font-size: 15px; margin: 0; }

/* the game's screens as postage stamps: white margin with a perforated edge */
.stamp { position: relative; padding: 12px; background:
  radial-gradient(circle, var(--paper) 4px, transparent 4.5px) -7px -7px / 14px 14px, #fffef6;
  filter: drop-shadow(0 8px 14px rgba(59, 47, 35, .18)); }
.stamp .img { padding: 3px; background: #fffef6; }
.stamp img { border: 1px solid #d9cfb3; }
.stamp.tilt-l { transform: rotate(-2.5deg); } .stamp.tilt-r { transform: rotate(2deg); }
.cap { font: 400 15px/1.6 var(--hand); color: var(--brown); margin-top: 14px; text-align: center; }

/* buttons: sea-coloured, rounded */
.btn { display: inline-block; font: 700 16px/1 var(--jp); letter-spacing: .1em; text-decoration: none; padding: 17px 28px; color: #fff; background: var(--deep); border-radius: 999px; box-shadow: 0 5px 0 #174f73; }
.btn.alt { color: var(--ink); background: var(--dry2); box-shadow: 0 5px 0 var(--wet); }
.btn:hover { transform: translateY(2px); box-shadow: 0 3px 0 #174f73; }
.btn.alt:hover { box-shadow: 0 3px 0 var(--wet); }
.btn:focus-visible, a:focus-visible { outline: 3px solid var(--food); outline-offset: 4px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 30px; }

/* ---- hero: the beach — sea at the top, wet sand, dry sand ---- */
.hero { position: relative; padding: 0 0 70px; overflow: hidden;
  background: linear-gradient(var(--deep) 0 70px, var(--mid) 70px 96px, var(--shal) 96px 112px, var(--foam) 112px 118px, var(--wet) 118px 210px, var(--dry) 210px); }
.hero .wrap { display: grid; grid-template-columns: 1.1fr .9fr; gap: 50px; align-items: center; padding-top: 170px; position: relative; }
.ganbare { display: inline-block; font: 700 22px var(--jp); color: var(--food); text-shadow: 2px 2px 0 #fffef2, -2px -2px 0 #fffef2, 2px -2px 0 #fffef2, -2px 2px 0 #fffef2; transform: rotate(-4deg); }
.logo { margin: 4px 0 0; font: 900 clamp(46px, 7.4vw, 78px)/1.1 var(--jp); color: var(--ink); letter-spacing: .06em; text-shadow: 3px 3px 0 #fffef2, -3px -3px 0 #fffef2, 3px -3px 0 #fffef2, -3px 3px 0 #fffef2, 0 3px 0 #fffef2, 0 -3px 0 #fffef2; }
.logo small { display: block; font: 700 15px/1.6 var(--jp); color: var(--brown); letter-spacing: .3em; margin-top: 10px; text-shadow: none; }
.hero .lead { font-size: 16.5px; margin-top: 22px; background: rgba(255, 253, 244, .82); padding: 14px 16px; border-radius: 6px; }
.hero-art { width: min(300px, 100%); justify-self: center; }
@media (max-width: 860px) { .hero .wrap { grid-template-columns: 1fr; padding-top: 150px; } .hero-art { width: min(260px, 74%); } }

/* ---- field-guide entry ---- */
.entry { display: grid; grid-template-columns: 1fr 1fr; gap: 0; background: #fffdf4; border: 1px solid var(--grid); box-shadow: 0 10px 24px rgba(59, 47, 35, .12); }
.entry > div { padding: 26px 28px; }
.entry > div + div { border-left: 1px dashed var(--grid); }
.entry .name { font: 900 30px/1.2 var(--jp); margin: 0; }
.entry .sci { font: italic 15px/1.4 Georgia, serif; color: var(--brown); margin: 4px 0 18px; }
.entry dl { margin: 0; display: grid; grid-template-columns: 5.5em 1fr; gap: 8px 12px; font-size: 15px; }
.entry dt { color: var(--brown); font-weight: 700; }
.entry dd { margin: 0; }
.feet { display: flex; gap: 14px; align-items: flex-end; margin-top: 10px; }
.foot { width: 34px; height: 40px; position: relative; }
.foot i { position: absolute; left: 50%; bottom: 0; width: 3px; height: 26px; background: var(--ink); border-radius: 2px; transform-origin: bottom center; }
.foot i:nth-child(1) { transform: rotate(-32deg); } .foot i:nth-child(3) { transform: rotate(32deg); }
.feet p { font: 400 15px/1.6 var(--hand); color: var(--brown); margin: 0; }
@media (max-width: 760px) { .entry { grid-template-columns: 1fr; } .entry > div + div { border-left: 0; border-top: 1px dashed var(--grid); } }

/* ---- layouts ---- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.step .n { font: 400 30px/1 var(--hand); color: var(--deep); display: block; margin-bottom: 6px; }
.split { display: grid; grid-template-columns: 280px 1fr; gap: 48px; align-items: start; }
.split.rev { grid-template-columns: 1fr 280px; }
.split.rev > figure { order: 2; }
.pair { display: grid; grid-template-columns: repeat(2, minmax(0, 270px)); justify-content: center; gap: 28px 70px; }
@media (max-width: 560px) { .pair { gap: 24px; } }
@media (max-width: 880px) { .steps { grid-template-columns: 1fr; } .split, .split.rev { grid-template-columns: 1fr; } .split > figure, .split.rev > figure { order: 0; width: min(280px, 78%); margin: 0 auto; } }

/* ---- scoring memo ---- */
.memo { list-style: none; margin: 0; padding: 0; }
.memo li { position: relative; padding: 12px 0 12px 30px; border-bottom: 1px dashed var(--grid); }
.memo li::before { content: ""; position: absolute; left: 4px; top: 21px; width: 13px; height: 13px; border-radius: 50%; background: var(--food); box-shadow: inset -3px -3px 0 rgba(0, 0, 0, .12); }   /* 12px + (31.2px - 13px) / 2 */
.memo b { color: var(--deep); }

.tips { list-style: none; margin: 0; padding: 0; counter-reset: t; }
.tips li { counter-increment: t; position: relative; padding: 12px 0 12px 36px; border-bottom: 1px dashed var(--grid); }
.tips li::before { content: counter(t); position: absolute; left: 2px; top: 12px; font: 400 22px/31.2px var(--hand); color: var(--deep); }
.faq dt { font-weight: 700; color: var(--deep); margin-top: 20px; }
.faq dd { margin: 4px 0 0; }

.final { text-align: center; padding: 90px 0 130px; position: relative; overflow: hidden; }
.final::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 70px; background: linear-gradient(var(--foam) 0 5px, var(--shal) 5px 18px, var(--mid) 18px 36px, var(--deep) 36px); }
.final .cta-row { justify-content: center; }
.games-nav { margin-top: 24px; font-size: 14px; }
footer { background: var(--deep); color: #e6f6f6; padding: 18px 0 36px; font-size: 13px; }
footer nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
footer a { color: #e6f6f6; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .btn:hover { transform: none; } }