/* ============ Zoggle design system ============ */

:root {
  --paper: #F7F9FA;
  --card: #FFFFFF;
  --ink: #16232E;
  --muted: #55656F;
  --line: #DBE3E8;
  --accent: #0E7D8A;
  --accent-ink: #0A5E68;
  --accent-soft: #E3EFF1;
  --amber: #B26A1F;
  --good: #2E7D4F;
  --bad: #A8503C;
  --code-bg: #EDF2F4;
  --shadow: 0 1px 2px rgba(22, 35, 46, 0.05), 0 6px 24px rgba(22, 35, 46, 0.07);
  --radius: 12px;
}
:root[data-theme="dark"] {
  --paper: #0E151A;
  --card: #151F26;
  --ink: #E7EDF1;
  --muted: #93A4AF;
  --line: #253039;
  --accent: #45B6C2;
  --accent-ink: #7CCFD8;
  --accent-soft: #16292E;
  --amber: #E0A056;
  --good: #63C08E;
  --bad: #DA8A75;
  --code-bg: #1A252C;
  --shadow: none;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0E151A;
    --card: #151F26;
    --ink: #E7EDF1;
    --muted: #93A4AF;
    --line: #253039;
    --accent: #45B6C2;
    --accent-ink: #7CCFD8;
    --accent-soft: #16292E;
    --amber: #E0A056;
    --good: #63C08E;
    --bad: #DA8A75;
    --code-bg: #1A252C;
    --shadow: none;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; background: var(--paper); }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Public Sans", "Segoe UI", -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}
h1, h2, h3 { font-family: "Archivo", "Helvetica Neue", Arial, sans-serif; margin: 0; text-wrap: balance; letter-spacing: -0.015em; }
h1 { font-size: 1.9rem; font-weight: 700; line-height: 1.15; }
h2 { font-size: 1.3rem; font-weight: 650; }
h3 { font-size: 1.05rem; font-weight: 600; }
p { margin: 0; }
a { color: var(--accent-ink); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.mono { font-family: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace; }

.wrap { max-width: 680px; margin: 0 auto; padding: 0 20px 80px; }

/* ---- header / nav ---- */
.site-head {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px 16px; padding: 20px 0 16px; margin-bottom: 28px;
  border-bottom: 1px solid var(--line);
}
.nav { flex-wrap: wrap; }
.logo {
  font-family: "Archivo", sans-serif; font-weight: 700; font-size: 1.5rem;
  letter-spacing: -0.03em; color: var(--ink); text-decoration: none; line-height: 1;
}
.logo .o { color: var(--accent); }
.nav { display: flex; align-items: center; gap: 16px; font-size: 0.88rem; }
.nav a { color: var(--muted); text-decoration: none; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--accent-ink); }
.theme-btn {
  background: none; border: 1px solid var(--line); border-radius: 6px;
  color: var(--muted); cursor: pointer; font-size: 0.85rem; line-height: 1;
  padding: 6px 8px;
}
.theme-btn:hover { color: var(--ink); border-color: var(--muted); }

/* ---- footer ---- */
.site-foot {
  margin-top: 72px; padding-top: 18px; border-top: 1px solid var(--line);
  color: var(--muted); font-size: 0.8rem;
  display: flex; flex-wrap: wrap; gap: 6px 18px;
}
.site-foot a { color: var(--muted); }

/* ---- generic ---- */
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 24px 26px;
}
@media (max-width: 480px) { .card { padding: 20px 18px; } }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: "Archivo", sans-serif; font-weight: 600; font-size: 0.95rem;
  border-radius: 9px; border: 1px solid transparent;
  padding: 12px 22px; cursor: pointer; text-decoration: none;
  background: var(--accent); color: #fff;
}
.btn:hover { filter: brightness(1.08); }
@media (prefers-reduced-motion: no-preference) {
  .btn { transition: transform 0.12s ease, filter 0.12s ease; }
  .btn:hover { transform: translateY(-1px); }
  .btn:active { transform: translateY(0); }
}
.btn.ghost { background: transparent; color: var(--accent-ink); border-color: var(--line); }
.btn.ghost:hover { border-color: var(--accent); filter: none; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; filter: none; }
.eyebrow {
  font-family: "IBM Plex Mono", monospace; font-size: 0.7rem; font-weight: 500;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent);
}
.tag {
  display: inline-block; font-family: "IBM Plex Mono", monospace; font-size: 0.68rem;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted);
  background: var(--code-bg); border-radius: 99px; padding: 2px 10px;
}

/* ---- game ---- */
.day-line { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 18px; }
.day-line h1 { font-size: 1.35rem; }
.day-line .date { color: var(--muted); font-size: 0.85rem; }

.progress { display: flex; gap: 6px; margin-bottom: 18px; }
.progress .pip { height: 5px; flex: 1; border-radius: 3px; background: var(--line); }
.progress .pip.done { background: var(--accent); }
.progress .pip.now { background: var(--accent); opacity: 0.45; }

.q-card { display: flex; flex-direction: column; gap: 16px; }
.q-meta { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.q-num { font-family: "IBM Plex Mono", monospace; font-size: 0.78rem; color: var(--muted); }
.q-text { font-family: "Archivo", sans-serif; font-size: 1.42rem; font-weight: 600; line-height: 1.32; text-wrap: balance; }

/* ---- welcome ---- */
.welcome {
  display: flex; flex-direction: column; align-items: center; text-align: center;
  gap: 14px; padding: 44px 30px 38px; margin-top: 8px;
}
.welcome .logo-big {
  font-family: "Archivo", sans-serif; font-weight: 700; font-size: 2.7rem;
  letter-spacing: -0.035em; line-height: 1;
}
.welcome .logo-big .o { color: var(--accent); }
.welcome .w-day {
  font-family: "IBM Plex Mono", monospace; font-size: 0.82rem;
  letter-spacing: 0.06em; color: var(--accent-ink);
}
.welcome .w-tag {
  font-family: "Archivo", sans-serif; font-weight: 650; font-size: 1.35rem;
  line-height: 1.3; text-wrap: balance; margin-top: 6px;
}
.welcome .w-sub { color: var(--muted); font-size: 0.95rem; max-width: 46ch; }
.welcome .w-stats {
  display: flex; gap: 24px; font-size: 0.85rem; color: var(--muted);
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  padding: 10px 26px; margin-top: 4px;
}
.welcome .w-stats b { color: var(--ink); font-variant-numeric: tabular-nums; }
.welcome .btn.play { font-size: 1.05rem; padding: 14px 34px; margin-top: 10px; }
.welcome .w-how { font-size: 0.88rem; color: var(--muted); }
.welcome .w-how:hover { color: var(--accent-ink); }

.guess-row { display: flex; gap: 10px; }
.guess-input {
  flex: 1; min-width: 0;
  font-family: "IBM Plex Mono", monospace; font-size: 1.05rem;
  background: var(--paper); color: var(--ink);
  border: 1.5px solid var(--line); border-radius: 8px; padding: 11px 14px;
}
.guess-input:focus { border-color: var(--accent); outline: none; }
.guess-input::placeholder { color: var(--muted); opacity: 0.7; }
.input-hint { font-size: 0.8rem; color: var(--muted); }
.input-hint b { color: var(--ink); font-weight: 600; }
.parse-echo { font-family: "IBM Plex Mono", monospace; font-size: 0.8rem; color: var(--accent-ink); min-height: 1.2em; }
.parse-echo.err { color: var(--bad); }

/* calculator */
.calc-toggle { align-self: flex-start; background: none; border: none; color: var(--accent-ink); cursor: pointer; font-size: 0.85rem; padding: 0; text-decoration: underline; text-underline-offset: 2px; }
.calc { border: 1px solid var(--line); border-radius: 8px; padding: 12px; display: none; flex-direction: column; gap: 8px; background: var(--paper); }
.calc.open { display: flex; }
.calc-display {
  font-family: "IBM Plex Mono", monospace; font-size: 1rem; text-align: right;
  background: var(--card); border: 1px solid var(--line); border-radius: 6px;
  padding: 8px 12px; min-height: 2.4em; word-break: break-all;
}
.calc-display .res { color: var(--accent-ink); font-size: 0.85rem; display: block; }
.calc-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; }
.calc-grid button {
  font-family: "IBM Plex Mono", monospace; font-size: 0.95rem;
  background: var(--card); color: var(--ink); border: 1px solid var(--line);
  border-radius: 6px; padding: 9px 0; cursor: pointer;
}
.calc-grid button:hover { border-color: var(--accent); }
.calc-grid button.op { color: var(--accent-ink); }
.calc-use { font-size: 0.82rem; }

/* reveal */
.reveal { display: flex; flex-direction: column; gap: 14px; }
.reveal-nums { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
@media (max-width: 480px) { .reveal-nums { grid-template-columns: 1fr; } }
.reveal-box { background: var(--paper); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; }
.reveal-box .lbl { font-family: "IBM Plex Mono", monospace; font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }
.reveal-box .val { font-family: "Archivo", sans-serif; font-size: 1.25rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.reveal-box .approx { font-size: 0.82rem; color: var(--muted); }
.ratio-line { display: flex; align-items: center; gap: 12px; }
.ratio-big { font-family: "Archivo", sans-serif; font-size: 2rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.grade { font-weight: 600; }
.grade.g0, .grade.g1 { color: var(--good); }
.grade.g2 { color: var(--accent-ink); }
.grade.g3 { color: var(--amber); }
.grade.g4, .grade.g5 { color: var(--bad); }
.worked { border-left: 3px solid var(--accent); background: var(--card); padding: 10px 14px; border-radius: 0 8px 8px 0; font-size: 0.92rem; }
.worked .src { display: block; margin-top: 4px; color: var(--muted); font-size: 0.8rem; }

/* results */
.results { display: flex; flex-direction: column; gap: 18px; }
.score-hero { text-align: center; padding: 10px 0 2px; }
.score-hero .big { font-family: "Archivo", sans-serif; font-size: 3rem; font-weight: 700; font-variant-numeric: tabular-nums; line-height: 1; }
.score-hero .sub { color: var(--muted); font-size: 0.9rem; margin-top: 6px; }
.result-rows { display: flex; flex-direction: column; }
.result-row { display: grid; grid-template-columns: 28px 1fr auto; gap: 12px; align-items: center; padding: 10px 2px; border-bottom: 1px solid var(--line); font-size: 0.9rem; }
.result-row:last-child { border-bottom: none; }
.result-row .emoji { font-size: 1rem; }
.result-row .rq { color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.result-row .rr { font-family: "IBM Plex Mono", monospace; font-variant-numeric: tabular-nums; }
.streak-line { display: flex; justify-content: center; gap: 22px; font-size: 0.85rem; color: var(--muted); }
.streak-line b { color: var(--ink); font-variant-numeric: tabular-nums; }
.share-row { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.toast { text-align: center; font-size: 0.82rem; color: var(--good); min-height: 1.2em; }

/* ---- share modal ---- */
.modal-back {
  position: fixed; inset: 0; z-index: 50;
  background: rgba(12, 20, 26, 0.55);
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
}
.modal {
  position: relative;
  background: var(--card); border: 1px solid var(--line);
  border-radius: 14px; box-shadow: 0 12px 48px rgba(0, 0, 0, 0.28);
  padding: 34px 30px 26px; width: 100%; max-width: 420px;
  display: flex; flex-direction: column; align-items: center; text-align: center; gap: 12px;
}
.modal-x {
  position: absolute; top: 10px; right: 12px;
  background: none; border: none; cursor: pointer;
  color: var(--muted); font-size: 1.6rem; line-height: 1;
  padding: 4px 8px; border-radius: 6px;
}
.modal-x:hover { color: var(--ink); background: var(--code-bg); }
.m-eyebrow {
  font-family: "IBM Plex Mono", monospace; font-size: 0.72rem;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent);
}
.m-title { font-size: 1.3rem; font-weight: 650; line-height: 1.28; }
.m-emoji { font-size: 1.7rem; letter-spacing: 0.15em; }
.m-sub { color: var(--muted); font-size: 0.9rem; max-width: 34ch; }
.modal .btn { width: 100%; }
.m-primary { margin-top: 6px; }
.m-secondary { margin-top: -4px; }
@media (prefers-reduced-motion: no-preference) {
  .modal-back { animation: fade 0.18s ease-out; }
  .modal { animation: pop 0.24s cubic-bezier(0.2, 0.9, 0.3, 1.2); }
  @keyframes fade { from { opacity: 0; } to { opacity: 1; } }
  @keyframes pop { from { opacity: 0; transform: translateY(12px) scale(0.97); } to { opacity: 1; transform: none; } }
}

/* archive */
.arch-list { display: flex; flex-direction: column; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 4px 18px; }
.arch-row {
  display: grid; grid-template-columns: 44px 128px 1fr auto; gap: 14px;
  align-items: baseline; padding: 13px 2px; border-bottom: 1px solid var(--line);
  font-size: 0.92rem; text-decoration: none; color: inherit;
}
.arch-row:last-child { border-bottom: none; }
.arch-row:hover .ad { color: var(--accent-ink); }
.arch-row .d { font-family: "IBM Plex Mono", monospace; color: var(--accent-ink); font-size: 0.85rem; }
.arch-row .ad { font-weight: 600; font-size: 0.9rem; white-space: nowrap; }
.arch-row .peek { color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.arch-row .st { font-family: "IBM Plex Mono", monospace; font-size: 0.8rem; color: var(--muted); text-align: right; }
.arch-row .st.played { color: var(--good); }
@media (max-width: 560px) {
  .arch-row { grid-template-columns: 44px 1fr auto; }
  .arch-row .peek { display: none; }
}

/* prose pages */
.prose { display: flex; flex-direction: column; gap: 16px; max-width: 62ch; }
.prose h1 { margin-bottom: 4px; }
.prose h2 { margin-top: 18px; }
.prose ul { margin: 0; padding-left: 20px; display: flex; flex-direction: column; gap: 6px; }
.prose li::marker { color: var(--accent); }
.prose .updated { color: var(--muted); font-size: 0.82rem; }
code.inline { background: var(--code-bg); border-radius: 4px; padding: 1px 6px; font-family: "IBM Plex Mono", monospace; font-size: 0.85em; }

@media (prefers-reduced-motion: no-preference) {
  .q-card, .reveal, .results, .welcome { animation: rise 0.28s ease-out; }
  @keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
}