/* Kürsli Rafeldt — shared styles for the public ZAP2 practice area (/ueben).
   Design tokens and component styles mirror the /elijah workspace. */
:root {
  --bg: #f2efe4; --bg-2: #ebe7d7; --paper: #fbf9f2;
  --ink: #111813; --ink-soft: #2c332d; --ink-mute: #6a6355;
  --rule: #d9d3c3; --rule-2: #c8c1ac;
  --forest: #1a3a2e; --forest-2: #2c5a45; --forest-dk: #0f2a20;
  --tan: #b08a57; --gold: #c9a961; --gold-dk: #a8872c; --claret: #6e2a2a;
}
* { box-sizing: border-box; }
html, body { background: var(--bg); color: var(--ink); margin: 0; font-family: 'Source Serif 4', Georgia, serif; -webkit-font-smoothing: antialiased; }
a { color: var(--forest); text-underline-offset: 3px; }

/* Site head */
.site-head { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 18px 32px; border-bottom: 1px solid var(--rule); background: var(--paper); flex-wrap: wrap; position: sticky; top: 0; z-index: 50; }
.site-head .brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); }
.kr-mark { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; background: var(--forest); color: var(--paper); font-family: 'Fraunces', Georgia, serif; font-size: 22px; letter-spacing: -.02em; }
.site-head .nm { font-family: 'Fraunces', Georgia, serif; font-size: 18px; color: var(--ink); }
.site-head .nm em { color: var(--forest); font-style: italic; }
.site-head nav { display: flex; gap: 20px; flex-wrap: wrap; font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: .2em; text-transform: uppercase; }
.site-head nav a { color: var(--ink-mute); text-decoration: none; padding-bottom: 4px; border-bottom: 1px solid transparent; }
.site-head nav a:hover, .site-head nav a.cur { color: var(--forest); border-bottom-color: var(--forest); }

/* Main shell */
.sb-main { max-width: 1000px; margin: 0 auto; padding: clamp(40px, 8vh, 88px) 24px 96px; }
.sb-head { text-align: center; margin-bottom: 40px; }
.sb-head .eyebrow { font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: .22em; text-transform: uppercase; color: var(--ink-mute); margin-bottom: 14px; }
.sb-head h1 { font-family: 'Fraunces', Georgia, serif; font-weight: 400; font-size: clamp(2.2rem, 5.2vw, 3.6rem); line-height: .98; letter-spacing: -.035em; margin: 0 0 14px; color: var(--ink); }
.sb-head h1 em { font-style: italic; color: var(--forest); }
.sb-head .lede { font-family: 'Fraunces', Georgia, serif; font-size: 19px; line-height: 1.45; color: var(--ink-soft); max-width: 60ch; margin: 0 auto; }

.sb-section { margin-top: 60px; scroll-margin-top: 90px; }
.sb-section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; border-top: 1px solid var(--rule); padding-top: 20px; margin-bottom: 22px; }
.sb-section-head .eyebrow { font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: .22em; text-transform: uppercase; color: var(--ink-mute); }
.sb-section h2 { font-family: 'Fraunces', Georgia, serif; font-weight: 500; font-size: clamp(1.7rem, 3vw, 2.3rem); line-height: 1.05; letter-spacing: -.02em; margin: 4px 0 0; }
.sb-section h2 em { font-style: italic; color: var(--forest); }
.sb-section .sub { font-family: 'Fraunces', Georgia, serif; font-size: 17px; color: var(--ink-soft); margin: 8px 0 0; max-width: 64ch; }
.scoreboard { display: inline-flex; gap: 18px; font-family: 'JetBrains Mono', monospace; font-size: 10px; letter-spacing: .18em; text-transform: uppercase; color: var(--ink-mute); white-space: nowrap; }
.scoreboard b { color: var(--forest); font-weight: 500; }

/* Theory blocks */
.theory { margin-bottom: 22px; }
.def { background: var(--bg); border-left: 2px solid var(--forest); padding: 14px 18px; margin: 12px 0; font-family: 'Source Serif 4', Georgia, serif; font-size: 15px; line-height: 1.55; color: var(--ink-soft); }
.def .lb { font-family: 'JetBrains Mono', monospace; font-size: 10px; letter-spacing: .2em; text-transform: uppercase; color: var(--forest); margin-bottom: 6px; }
.def .lb em { font-style: italic; color: var(--gold-dk); letter-spacing: 0; text-transform: none; }
.def b { color: var(--forest); }
.formula { text-align: center; padding: 6px 0; color: var(--ink); }
.formula .katex { font-size: 1.2em; color: var(--ink); }
.formrow { display: flex; flex-wrap: wrap; gap: 8px 28px; justify-content: center; padding: 6px 0; }
.formrow .formula { padding: 2px 0; }
.wex { border: 1px solid var(--rule); padding: 14px 18px; margin: 12px 0; background: var(--paper); }
.wex .hd { font-family: 'JetBrains Mono', monospace; font-size: 10px; letter-spacing: .22em; text-transform: uppercase; color: var(--gold-dk); margin-bottom: 8px; display: flex; justify-content: space-between; border-bottom: 1px solid var(--rule); padding-bottom: 6px; }
.wex .hd .nm { font-family: 'Fraunces', Georgia, serif; font-style: italic; font-size: 13px; letter-spacing: 0; text-transform: none; color: var(--forest); }
.wex .q { font-family: 'Source Serif 4', Georgia, serif; font-size: 15px; line-height: 1.5; margin-bottom: 6px; }
.wex .s { font-family: 'Source Serif 4', Georgia, serif; font-size: 14.5px; line-height: 1.6; color: var(--ink-soft); padding-left: 12px; border-left: 1px solid var(--gold); margin-top: 4px; }
.wex .s b { color: var(--forest); }
.wex .res { font-family: 'Fraunces', Georgia, serif; font-size: 15px; font-weight: 500; margin-top: 8px; color: var(--forest); }

/* Trainer card */
.card { background: var(--paper); border: 1px solid var(--rule); padding: clamp(20px, 3vw, 36px); display: flex; flex-direction: column; gap: 22px; align-items: center; }
.prompt { font-family: 'Fraunces', Georgia, serif; font-size: 19px; line-height: 1.45; color: var(--ink); text-align: center; max-width: 62ch; }
.prompt .expr { display: inline-block; margin-top: 6px; font-family: 'JetBrains Mono', monospace; font-size: 22px; color: var(--forest); background: var(--bg-2); padding: 6px 16px; border: 1px solid var(--rule); letter-spacing: .02em; }
.prompt .katex { font-size: 1.15em; }
.prompt figure { margin: 10px 0 0; }
.input-row { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; align-items: center; }
.input-row input[type="text"] { min-width: 260px; padding: 12px 14px; font-family: 'JetBrains Mono', monospace; font-size: 19px; text-align: center; background: var(--paper); border: 1px solid var(--rule); color: var(--ink); outline: none; }
.input-row input[type="text"]:focus { border-color: var(--forest); }
.btn-row { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
.btn { font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: .22em; text-transform: uppercase; padding: 11px 18px; border: 1px solid var(--forest); background: var(--forest); color: var(--paper); cursor: pointer; }
.btn:hover { background: var(--forest-2); border-color: var(--forest-2); }
.btn.ghost { background: transparent; color: var(--forest); }
.btn.ghost:hover { background: rgba(26,58,46,0.06); }
.feedback { font-family: 'Source Serif 4', Georgia, serif; font-size: 15px; line-height: 1.45; padding: 12px 14px; border-left: 3px solid var(--rule); background: var(--bg-2); color: var(--ink-soft); max-width: 64ch; width: 100%; }
.feedback.good { border-left-color: var(--forest); color: var(--forest-dk); background: rgba(26,58,46,0.06); }
.feedback.bad { border-left-color: var(--claret); color: var(--claret); background: rgba(110,42,42,0.06); }
.feedback strong { font-family: 'Fraunces', Georgia, serif; font-weight: 500; }
.feedback code, .prompt code, .sub code, .def code { font-family: 'JetBrains Mono', monospace; background: rgba(255,255,255,.55); padding: 1px 6px; border: 1px solid var(--rule); }

/* Hub (index) */
.hub-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 22px; margin-top: 30px; }
.hub-card { display: flex; flex-direction: column; background: var(--paper); border: 1px solid var(--rule); padding: 26px 24px; text-decoration: none; color: var(--ink); transition: border-color .15s, transform .15s; }
.hub-card:hover { border-color: var(--forest); transform: translateY(-2px); }
.hub-card .ch { font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: .22em; text-transform: uppercase; color: var(--gold-dk); }
.hub-card h2 { font-family: 'Fraunces', Georgia, serif; font-weight: 500; font-size: 1.7rem; line-height: 1.05; margin: 10px 0 8px; }
.hub-card h2 em { font-style: italic; color: var(--forest); }
.hub-card p { font-family: 'Source Serif 4', Georgia, serif; font-size: 15px; line-height: 1.5; color: var(--ink-soft); margin: 0 0 14px; }
.hub-card ul { list-style: none; margin: 0; padding: 0; }
.hub-card li { font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: .04em; color: var(--ink-mute); padding: 4px 0; border-top: 1px dotted var(--rule); }
.hub-card li::before { content: '→ '; color: var(--forest); }

.site-foot { border-top: 1px solid var(--rule); background: var(--paper); padding: 28px 32px; margin-top: 80px; }
.site-foot .wrap { max-width: 1000px; margin: 0 auto; font-family: 'Source Serif 4', Georgia, serif; font-size: 13px; color: var(--ink-mute); }

@media (max-width: 600px) {
  .site-head { padding: 12px 16px; gap: 12px; }
  .site-head nav { gap: 12px; font-size: 10px; }
  .prompt .expr { font-size: 18px; }
  .input-row input[type="text"] { min-width: 180px; font-size: 17px; }
}