/* スグコン：ネイビー × サンセット（デザイン案01）。色はすべて下の変数で決めています */
:root {
  --bg: #F4F5FA; --sf: #FFFFFF; --ink: #0F1B33; --mu: #5B6783; --ln: #DCE1EE; --chip: #E9ECF5;
  --navy: #0F1B33; --ac2: #D8381F; --ai: #FFFFFF;
  --btn: linear-gradient(120deg, #F26A21, #D8381F);
  --flag: #FF8A3D;
  --ad: #FFF1E8; --al: #F2C3A6;
  --ok: #2BC6A4; --ok-ink: #06241D; --ok-soft: #E4F6F1; --ok-text: #0B7A64;
  --no: #C73B2F; --r: 10px;
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) {
  --bg: #0A1224; --sf: #121D36; --ink: #EAF0FB; --mu: #93A3C0; --ln: #243252; --chip: #1B2947;
  --navy: #0A1224; --ac2: #FF9D66; --ai: #1B0E05; --btn: linear-gradient(120deg, #FFA45C, #FF6B3D);
  --ad: #16223F; --al: #34467A; --ok-soft: #12302B; --ok-text: #5FE0C0; --no: #FF8A7D; color-scheme: dark; } }
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.65 "Noto Sans JP", system-ui, sans-serif; }
a { color: inherit; }
.hd { background: var(--navy); color: #fff; border-bottom: 1px solid transparent; }
.hd-in { max-width: 560px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; }
.wide .hd-in { max-width: 1040px; }
.logo { font-family: "Zen Kaku Gothic New", "Noto Sans JP", sans-serif; font-weight: 700; font-size: 18px; display: inline-flex; align-items: center; gap: 8px; text-decoration: none; color: #fff; }
.logo i { width: 16px; height: 16px; border-radius: 50%; border: 2px solid #fff; position: relative; display: inline-block; }
.logo i::after { content: ""; position: absolute; left: 4px; top: -9px; width: 2px; height: 13px; background: var(--flag); }
.hd small { font-family: Outfit, sans-serif; font-size: 11px; letter-spacing: .08em; opacity: .85; }
main { max-width: 560px; margin: 0 auto; padding: 22px 18px 48px; display: grid; gap: 16px; }
.wide main { max-width: 1040px; }
h1, h2, h3 { font-family: "Zen Kaku Gothic New", "Noto Sans JP", sans-serif; margin: 0; line-height: 1.3; text-wrap: balance; }
.t { font-size: 27px; letter-spacing: -.005em; }
.t em { font-style: normal; color: var(--ac2); }
.sub { margin: 0; color: var(--mu); font-size: 13px; }
.hint { margin: 0; font-size: 12px; color: var(--mu); }
.center { text-align: center; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--ln); border-bottom: 1px solid var(--ln); }
.steps div { padding: 9px 6px 9px 0; font-size: 12px; font-weight: 700; display: grid; gap: 1px; line-height: 1.4; }
.steps em { font-style: normal; font-family: Outfit, sans-serif; font-size: 12px; letter-spacing: .1em; color: var(--ac2); }

label.f { display: grid; gap: 5px; font-size: 12px; color: var(--mu); font-weight: 500; }
input, select, textarea { font: inherit; color: var(--ink); background: var(--sf); border: 1px solid var(--ln); border-radius: var(--r); padding: 10px 12px; min-height: 44px; width: 100%; }
textarea { min-height: 0; line-height: 1.6; }
input:focus-visible, select:focus-visible, textarea:focus-visible, button:focus-visible, a:focus-visible, summary:focus-visible { outline: 2px solid var(--ac2); outline-offset: 2px; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.card { background: var(--sf); border: 1px solid var(--ln); border-radius: 14px; padding: 14px 16px; display: grid; gap: 10px; }
.card h3 { font-size: 15px; }
.sec { font-size: 12px; font-weight: 700; color: var(--mu); letter-spacing: .06em; display: flex; gap: 8px; align-items: center; }
.sec::after { content: ""; flex: 1; height: 1px; background: var(--ln); }

.btn { appearance: none; border: 0; cursor: pointer; font: inherit; font-weight: 700; display: flex; align-items: center; justify-content: center; gap: 8px; min-height: 50px; border-radius: var(--r); background: var(--btn); color: var(--ai); padding: 8px 14px; text-align: center; text-decoration: none; letter-spacing: .03em; width: 100%; }
.btn.sm { min-height: 38px; font-size: 13px; width: auto; padding: 6px 14px; }
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--ln); }
.btn.navy { background: var(--navy); color: #fff; }
.btn.danger { background: transparent; color: var(--no); border: 1px solid var(--no); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.row.between { justify-content: space-between; }

.sugg { border: 1px solid var(--ln); border-radius: var(--r); margin-top: -4px; overflow: hidden; font-size: 13.5px; background: var(--sf); }
.sugg button { all: unset; box-sizing: border-box; display: flex; justify-content: space-between; gap: 8px; width: 100%; padding: 9px 12px; cursor: pointer; border-bottom: 1px solid var(--ln); }
.sugg button:hover, .sugg button:focus-visible { background: var(--chip); }
.sugg small { color: var(--mu); font-size: 11px; white-space: nowrap; }
.sugg .free { padding: 7px 12px; color: var(--mu); font-size: 12px; background: var(--chip); }

.url-box { border: 1px dashed var(--ln); border-radius: var(--r); padding: 9px 12px; font-size: 13px; word-break: break-all; color: var(--mu); background: var(--bg); }
.url-lbl { font-size: 12px; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.tag { font-size: 11px; font-weight: 700; padding: 1px 8px; border-radius: 999px; background: var(--chip); color: var(--ac2); }
.tag.ok { background: var(--ok-soft); color: var(--ok-text); }
.warn { background: var(--ad); border: 1px solid var(--al); border-radius: var(--r); padding: 10px 12px; font-size: 13px; }

/* 回答ページ */
.info dl { margin: 0; display: grid; grid-template-columns: 5em 1fr; gap: 4px 10px; font-size: 14px; }
.info dt { color: var(--mu); } .info dd { margin: 0; font-weight: 500; }
.seg { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.seg button { font: inherit; font-weight: 700; font-size: 15px; padding: 11px 0; min-height: 46px; background: var(--sf); color: var(--ink); border: 1px solid var(--ln); border-radius: var(--r); cursor: pointer; }
.seg button[aria-pressed="true"] { background: var(--ok-soft); border-color: var(--ok); color: var(--ok-text); }
.seg button.no[aria-pressed="true"] { background: var(--chip); border-color: var(--mu); color: var(--ink); }
.count { display: flex; gap: 14px; flex-wrap: wrap; font-size: 13px; color: var(--mu); }
.count b { color: var(--ink); font-family: Outfit, sans-serif; font-size: 16px; }

.done { display: grid; justify-items: center; gap: 8px; text-align: center; padding-top: 6px; }
.ring { width: 62px; height: 62px; border-radius: 50%; background: var(--ok); color: var(--ok-ink); display: grid; place-items: center; font-size: 30px; font-weight: 700; }
.nm2 { font-size: 21px; font-weight: 700; font-family: "Zen Kaku Gothic New", sans-serif; }
.nm2 small { font-weight: 400; color: var(--mu); font-size: 13px; }
.badges { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.badges div { border-radius: var(--r); background: var(--ok-soft); padding: 9px 12px; font-size: 12px; color: var(--mu); }
.badges b { display: block; font-size: 18px; color: var(--ok-text); }
.badges .no b { color: var(--ink); }
.ad { background: var(--ad); border: 1px dashed var(--al); border-radius: var(--r); padding: 12px 14px; display: grid; gap: 5px; text-decoration: none; color: inherit; }
.ad .tg { font-size: 10.5px; font-weight: 700; letter-spacing: .1em; color: var(--mu); }
.ad b { font-family: "Zen Kaku Gothic New", sans-serif; font-size: 15px; line-height: 1.45; }
.ad p { margin: 0; font-size: 12.5px; color: var(--mu); }
.ad .lnk { font-size: 13px; font-weight: 700; color: var(--ac2); }

/* 幹事ページ */
.tabs { display: flex; gap: 4px; padding: 4px; border: 1px solid var(--ln); border-radius: 12px; background: var(--sf); overflow-x: auto; }
.tabs button { flex: 1; white-space: nowrap; font: inherit; font-weight: 700; font-size: 14px; border: 0; background: transparent; color: var(--mu); padding: 9px 14px; border-radius: 9px; cursor: pointer; }
.tabs button[aria-pressed="true"] { background: var(--navy); color: #fff; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(80px, 1fr)); gap: 8px; }
.stats div { border: 1px solid var(--ln); border-radius: 12px; padding: 8px 4px; text-align: center; font-size: 11px; color: var(--mu); background: var(--sf); }
.stats b { display: block; font-size: 24px; font-family: Outfit, sans-serif; color: var(--ink); line-height: 1.2; }
.switch { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 700; cursor: pointer; }
.switch input { width: 20px; height: 20px; min-height: 0; accent-color: #0B7A64; }
.tbl { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; font-variant-numeric: tabular-nums; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--ln); vertical-align: top; }
th { font-size: 11px; color: var(--mu); font-weight: 500; white-space: nowrap; }
.y { color: var(--ok-text); font-weight: 700; } .n { color: var(--no); font-weight: 700; } .m { color: var(--mu); }
.memo { font-size: 12px; color: var(--mu); }
.xbtn { all: unset; cursor: pointer; color: var(--mu); padding: 4px 8px; border-radius: 6px; font-size: 12px; }
.xbtn:hover, .xbtn:focus-visible { background: var(--chip); color: var(--no); }
details > summary { cursor: pointer; font-weight: 700; font-size: 14px; }
details[open] > summary { margin-bottom: 10px; }
.txt { font-size: 13px; line-height: 1.75; }

.cart-split { display: grid; gap: 14px; }
@media (min-width: 820px) { .cart-split { grid-template-columns: 1fr 280px; align-items: start; } .pool { position: sticky; top: 12px; } }
.carts { display: grid; gap: 10px; }
.cart { border: 1px solid var(--ln); border-radius: 14px; background: var(--sf); padding: 10px 12px; display: grid; gap: 8px; position: relative; }
.ch { display: flex; align-items: center; gap: 8px; font-size: 13px; font-variant-numeric: tabular-nums; }
.ch b { font-size: 17px; font-family: "Zen Kaku Gothic New", sans-serif; }
.course-btn { all: unset; cursor: pointer; font-family: Outfit, sans-serif; font-size: 11px; font-weight: 700; letter-spacing: .08em; padding: 2px 10px; border-radius: 999px; background: var(--chip); color: var(--ac2); }
.ch .av { margin-left: auto; font-size: 12px; color: var(--mu); }
.seats { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.seat { all: unset; box-sizing: border-box; cursor: pointer; background: var(--chip); border-radius: 8px; padding: 7px 10px; font-size: 13.5px; display: flex; justify-content: space-between; gap: 6px; min-height: 36px; align-items: center; }
.seat i { font-style: normal; color: var(--mu); font-size: 11.5px; font-family: Outfit, sans-serif; }
.seat em { font-style: normal; font-size: 10.5px; color: var(--no); font-weight: 700; }
.seat.empty { background: transparent; border: 1px dashed var(--ln); color: var(--mu); }
.seat.sel { border-color: var(--ac2); border-style: solid; color: var(--ac2); font-weight: 700; }
.swap { all: unset; cursor: pointer; align-self: center; justify-self: center; font-size: 13px; color: var(--mu); padding: 0 10px; }
.pool { border: 1px solid var(--ln); border-radius: 14px; background: var(--sf); padding: 12px; display: grid; gap: 8px; }
.pool-h { font-weight: 700; font-size: 14px; display: flex; justify-content: space-between; }
.pool-list { display: flex; flex-wrap: wrap; gap: 6px; }
.pool-btn { all: unset; cursor: pointer; background: var(--chip); padding: 6px 11px; border-radius: 999px; font-size: 13.5px; display: inline-flex; gap: 6px; }
.pool-btn i { font-style: normal; color: var(--mu); font-size: 11.5px; font-family: Outfit, sans-serif; }
.notice-img img { width: 100%; border-radius: 12px; display: block; border: 1px solid var(--ln); }

.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: var(--navy); color: #fff; padding: 10px 18px; border-radius: 999px; font-size: 13.5px; z-index: 50; max-width: 90vw; box-shadow: 0 8px 24px rgba(0,0,0,.3); }
.loading { color: var(--mu); text-align: center; padding: 40px 0; }
@media (prefers-reduced-motion: no-preference) { .btn { transition: filter .15s; } .btn:hover:not(:disabled) { filter: brightness(1.06); } }