:root {
  --bg: #0b130e;
  --card: #121f17;
  --card-border: #1e3326;
  --text: #e9f5ee;
  --muted: #8fb3a0;
  --accent: #4ade80;
  --accent-dim: #22c55e33;
  --bad: #f87171;
  --warn: #fbbf24;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  line-height: 1.5;
}

header {
  border-bottom: 1px solid var(--card-border);
  background: linear-gradient(180deg, #10271a 0%, var(--bg) 100%);
}

.header-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 28px 20px 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: end;
  justify-content: space-between;
}

h1 { margin: 0; font-size: 1.7rem; font-weight: 800; letter-spacing: -0.02em; }
.subtitle { margin: 4px 0 0; color: var(--muted); font-size: 0.92rem; }

.header-controls { display: flex; gap: 14px; align-items: end; flex-wrap: wrap; }
.session-picker { display: flex; flex-direction: column; gap: 4px; }
.session-picker label { font-size: 0.75rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }

#upload-btn {
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 8px 12px;
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}
#upload-btn:hover { background: #22c55e55; }

.header-note { padding-top: 0; padding-bottom: 14px; }
.header-note .hint { margin: 0; }
#upload-status { color: var(--accent); font-weight: 600; }

select {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 8px 12px;
  font: inherit;
  font-size: 0.9rem;
}

.toc {
  position: sticky;
  top: 0;
  z-index: 10;
  background: #0d1710f2;
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--card-border);
  display: flex;
  gap: 4px;
  overflow-x: auto;
  padding: 0 max(20px, calc((100% - 1180px) / 2 + 20px));
  scrollbar-width: none;
}
.toc::-webkit-scrollbar { display: none; }
.toc a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 500;
  padding: 10px 10px 8px;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}
.toc a:hover { color: var(--text); }
.toc a.active { color: var(--accent); border-bottom-color: var(--accent); }

section[id], .card[id] { scroll-margin-top: 56px; }

main { max-width: 1180px; margin: 0 auto; padding: 20px; display: grid; gap: 18px; }

.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }

.kpi {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 14px 16px;
}
.kpi .value { font-size: 1.55rem; font-weight: 800; letter-spacing: -0.02em; }
.kpi .label { color: var(--muted); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; }
.kpi .sub { color: var(--muted); font-size: 0.74rem; margin-top: 2px; line-height: 1.35; }
.kpi .delta { font-size: 0.8rem; }
.kpi .delta.up { color: var(--accent); }
.kpi .delta.down { color: var(--bad); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 18px; }
@media (max-width: 900px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 18px;
  min-width: 0;
}

.card h2 {
  margin: 0 0 12px;
  font-size: 1.02rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.hint { color: var(--muted); font-size: 0.8rem; font-weight: 400; margin: 8px 0 0; }
h2 .hint { margin: 0; }

.explain { color: var(--muted); font-size: 0.85rem; margin: -4px 0 12px; }
.tag-good { color: var(--accent); font-weight: 600; }
.tag-warn { color: var(--warn); font-weight: 600; }

.explainer summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
}
.explainer-body { color: var(--muted); font-size: 0.9rem; max-width: 820px; }
.explainer-body strong { color: var(--text); }
.explainer-body ul { padding-left: 20px; }
.explainer-body li { margin: 5px 0; }

.inline-select { padding: 4px 8px; font-size: 0.8rem; }

.chart-wrap { position: relative; height: 300px; }
.chart-wrap.tall { height: 420px; }

.benchmark-list { display: grid; gap: 10px; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); }

.benchmark {
  display: grid;
  grid-template-columns: 170px 1fr 70px;
  gap: 10px;
  align-items: center;
  font-size: 0.84rem;
}
.benchmark .name { color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.benchmark .value { text-align: right; font-weight: 600; font-variant-numeric: tabular-nums; }
.benchmark .value.in-range { color: var(--accent); }
.benchmark .value.out-range { color: var(--warn); }

.track {
  position: relative;
  height: 10px;
  border-radius: 5px;
  background: #0e1812;
  border: 1px solid var(--card-border);
}
.track .range { position: absolute; top: 0; bottom: 0; background: var(--accent-dim); border-radius: 5px; }
.track .dot {
  position: absolute;
  top: 50%;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  background: var(--warn);
}
.track .dot.in-range { background: var(--accent); }

/* ---------- coaching ---------- */
.tip {
  border: 1px solid var(--card-border);
  border-left: 4px solid var(--warn);
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 10px;
  background: #0e1812;
}
.tip.fix-first { border-left-color: var(--bad); }
.tip.fine-tune { border-left-color: var(--accent); }
.tip h3 { margin: 0 0 4px; font-size: 0.95rem; display: flex; gap: 8px; align-items: baseline; flex-wrap: wrap; }
.tip .badge {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 8px;
  border-radius: 99px;
  background: #fbbf2422;
  color: var(--warn);
}
.tip.fix-first .badge { background: #f8717122; color: var(--bad); }
.tip.fine-tune .badge { background: var(--accent-dim); color: var(--accent); }
.tip .why { color: var(--muted); font-size: 0.86rem; margin: 0 0 6px; }
.tip ul { margin: 0; padding-left: 20px; font-size: 0.86rem; }
.tip li { margin: 3px 0; }

.tip-body { display: grid; grid-template-columns: 1fr 330px; gap: 16px; align-items: start; }
.inspector-grid { display: grid; grid-template-columns: 1fr 330px; gap: 16px; align-items: start; }
@media (max-width: 800px) { .tip-body, .inspector-grid { grid-template-columns: 1fr; } }

.diagram-box {
  background: #0b130e;
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 8px;
}
svg.diagram { width: 100%; height: auto; display: block; font-family: "Inter", system-ui, sans-serif; }
.diagram-caption { color: var(--muted); font-size: 0.75rem; text-align: center; padding: 4px 6px 2px; line-height: 1.4; }

.strengths { margin-top: 14px; }
.strengths .strengths-title { font-size: 0.86rem; font-weight: 600; color: var(--accent); margin-bottom: 6px; }
.strength-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.strength-chips span {
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: 99px;
  padding: 3px 10px;
  font-size: 0.78rem;
}
.coach-allgood { color: var(--accent); font-size: 0.9rem; }

/* ---------- shot inspector ---------- */
.inspector-empty { color: var(--muted); font-size: 0.9rem; }
.inspector-headline { font-size: 1.02rem; font-weight: 600; margin: 0 0 4px; }
.inspector-sub { color: var(--muted); font-size: 0.82rem; margin: 0 0 10px; }
.inspector-stats { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.stat-pill {
  background: #0e1812;
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 0.8rem;
}
.stat-pill .v { font-weight: 700; font-variant-numeric: tabular-nums; }
.stat-pill .ideal { color: var(--muted); font-size: 0.7rem; }
.inspector-points { margin: 0; padding-left: 20px; font-size: 0.88rem; }
.inspector-points li { margin: 4px 0; }

footer { max-width: 1180px; margin: 0 auto; padding: 10px 20px 36px; color: var(--muted); font-size: 0.84rem; }
footer a { color: var(--accent); }

/* ===================== Accounts, auth gate & AI coach ===================== */

.auth-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: radial-gradient(1200px 600px at 50% -10%, #10271a 0%, var(--bg) 60%);
}
.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 28px 26px 24px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}
.auth-card h1 { font-size: 1.6rem; }
.auth-tag { color: var(--muted); font-size: 0.9rem; margin: 8px 0 18px; }
.auth-tabs { display: flex; gap: 6px; margin-bottom: 16px; }
.auth-tab {
  flex: 1;
  padding: 9px 10px;
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--muted);
  border-radius: 9px;
  cursor: pointer;
  font: inherit;
  font-weight: 600;
}
.auth-tab.active { background: var(--accent-dim); color: var(--text); border-color: var(--accent); }
#auth-form { display: flex; flex-direction: column; gap: 6px; }
#auth-form label { font-size: 0.82rem; color: var(--muted); margin-top: 8px; }
#auth-form input {
  padding: 11px 12px;
  background: var(--bg);
  border: 1px solid var(--card-border);
  border-radius: 9px;
  color: var(--text);
  font: inherit;
}
#auth-form input:focus { outline: none; border-color: var(--accent); }
.auth-submit {
  margin-top: 16px;
  padding: 12px;
  background: var(--accent);
  color: #052e16;
  border: none;
  border-radius: 10px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
.auth-submit:disabled { opacity: 0.6; cursor: default; }
.auth-error { color: var(--bad); font-size: 0.86rem; min-height: 1.1em; margin: 10px 0 0; }

.account-bar {
  max-width: 1180px;
  margin: 0 auto;
  padding: 8px 20px;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 14px;
  font-size: 0.85rem;
}
.account-email { color: var(--muted); }
.link-btn {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font: inherit;
  padding: 0;
  text-decoration: underline;
}
.link-btn.danger { color: var(--bad); margin-left: 8px; }

/* AI coach card */
.ai-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: end;
  margin: 6px 0 10px;
}
.ai-field { display: flex; flex-direction: column; gap: 4px; }
.ai-field label { font-size: 0.78rem; color: var(--muted); }
.ai-field-key { flex: 1 1 240px; }
.ai-field input,
.ai-field select {
  padding: 9px 11px;
  background: var(--bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  color: var(--text);
  font: inherit;
}
.ai-field input:focus, .ai-field select:focus { outline: none; border-color: var(--accent); }
.ai-run {
  padding: 9px 16px;
  background: var(--accent);
  color: #052e16;
  border: none;
  border-radius: 8px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
}
.ai-run:disabled { opacity: 0.6; cursor: default; }
.ai-remember { display: inline-flex; align-items: center; gap: 7px; font-size: 0.82rem; color: var(--muted); }
.ai-output { margin-top: 14px; }
.ai-loading { color: var(--muted); }
.ai-err { color: var(--bad); }
.ai-feedback {
  background: var(--bg);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 14px 18px;
}
.ai-feedback h2, .ai-feedback h3, .ai-feedback h4 { margin: 14px 0 6px; color: var(--accent); font-size: 1rem; }
.ai-feedback h2:first-child, .ai-feedback h3:first-child { margin-top: 0; }
.ai-feedback ul { margin: 6px 0; padding-left: 20px; }
.ai-feedback li { margin: 3px 0; }
.ai-feedback code {
  background: #0b130e;
  border: 1px solid var(--card-border);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 0.88em;
}

/* ===================== Landing page ===================== */
#landing { max-width: 100%; }
.lp-nav {
  max-width: 1100px; margin: 0 auto; padding: 18px 20px;
  display: flex; align-items: center; justify-content: space-between;
}
.lp-logo { font-weight: 800; letter-spacing: -0.02em; font-size: 1.1rem; }
.lp-nav-actions { display: flex; align-items: center; gap: 16px; }
.lp-btn {
  padding: 12px 22px; background: var(--accent); color: #052e16; border: none;
  border-radius: 10px; font: inherit; font-weight: 700; cursor: pointer;
}
.lp-btn:hover { filter: brightness(1.05); }
.lp-btn-sm { padding: 8px 14px; border-radius: 8px; font-size: 0.9rem; }
.lp-btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--card-border); }
.lp-btn-ghost:hover { border-color: var(--accent); }

.lp-hero { background: radial-gradient(1100px 520px at 50% -120px, #11331f 0%, var(--bg) 62%); }
.lp-hero-inner { max-width: 760px; margin: 0 auto; padding: 60px 20px 70px; text-align: center; }
.lp-badge {
  display: inline-block; padding: 5px 12px; border: 1px solid var(--card-border);
  border-radius: 999px; color: var(--accent); font-size: 0.78rem; font-weight: 600;
  background: var(--accent-dim); margin-bottom: 18px;
}
.lp-hero h1 { font-size: 2.7rem; line-height: 1.1; letter-spacing: -0.03em; margin: 0 0 16px; }
.lp-sub { color: var(--muted); font-size: 1.08rem; max-width: 620px; margin: 0 auto 26px; }
.lp-cta-row { display: flex; gap: 14px; flex-wrap: wrap; }
.lp-cta-row:not(.lp-cta-center) { justify-content: center; }
.lp-cta-center { justify-content: center; }
.lp-fineprint { color: var(--muted); font-size: 0.82rem; margin-top: 16px; }

.lp-h2 { text-align: center; font-size: 1.7rem; letter-spacing: -0.02em; margin: 0 0 28px; }
.lp-features { max-width: 1040px; margin: 0 auto; padding: 56px 20px; }
.lp-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.lp-feat {
  background: var(--card); border: 1px solid var(--card-border); border-radius: 14px; padding: 22px;
}
.lp-emoji { font-size: 1.8rem; }
.lp-feat h3 { margin: 10px 0 6px; font-size: 1.08rem; }
.lp-feat p { margin: 0; color: var(--muted); font-size: 0.92rem; }

.lp-how { max-width: 1040px; margin: 0 auto; padding: 24px 20px 56px; }
.lp-steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; }
.lp-step { padding: 8px 4px; }
.lp-num {
  display: inline-flex; align-items: center; justify-content: center; width: 34px; height: 34px;
  border-radius: 50%; background: var(--accent-dim); color: var(--accent); font-weight: 800; border: 1px solid var(--accent);
}
.lp-step h3 { margin: 12px 0 6px; font-size: 1.06rem; }
.lp-step p { margin: 0; color: var(--muted); font-size: 0.92rem; }

.lp-key { padding: 0 20px 56px; }
.lp-key-card {
  max-width: 820px; margin: 0 auto; text-align: center; background: var(--card);
  border: 1px solid var(--card-border); border-radius: 16px; padding: 30px 26px;
}
.lp-key-card h2 { margin: 0 0 10px; font-size: 1.3rem; }
.lp-key-card p { margin: 0; color: var(--muted); }

.lp-final { text-align: center; padding: 20px 20px 70px; }
.lp-final h2 { font-size: 1.6rem; margin: 0 0 20px; letter-spacing: -0.02em; }
.lp-footer { border-top: 1px solid var(--card-border); text-align: center; color: var(--muted); padding: 22px 20px; font-size: 0.85rem; }

@media (max-width: 560px) { .lp-hero h1 { font-size: 2.05rem; } }

/* Auth modal close + demo banner */
.auth-card { position: relative; }
.auth-close {
  position: absolute; top: 12px; right: 14px; background: none; border: none;
  color: var(--muted); font-size: 1.5rem; line-height: 1; cursor: pointer;
}
.auth-close:hover { color: var(--text); }

.demo-banner {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 14px;
  background: var(--accent-dim); border-bottom: 1px solid var(--accent);
  padding: 10px 20px; font-size: 0.9rem; text-align: center;
}

/* The hidden attribute must always win over author display rules. */
[hidden] { display: none !important; }

/* ===================== New-user empty state ===================== */
.empty-state { display: none; }
main.is-empty > section,
main.is-empty > details { display: none; }
main.is-empty > #empty-state { display: flex; }
.empty-state {
  justify-content: center;
  padding: 50px 20px 70px;
}
.empty-card {
  max-width: 460px; text-align: center; background: var(--card);
  border: 1px solid var(--card-border); border-radius: 16px; padding: 36px 28px;
}
.empty-emoji { font-size: 2.6rem; }
.empty-card h2 { margin: 10px 0 8px; }
.empty-card p { color: var(--muted); margin: 0 0 18px; }
.empty-card .lp-btn { font-size: 1rem; }
.empty-hint { font-size: 0.82rem; margin-top: 16px !important; }