:root {
  --bg: #060d1a;
  --bg-2: #0b1f3a;
  --card: rgba(255, 255, 255, 0.04);
  --card-border: rgba(255, 255, 255, 0.09);
  --ink: #eaf1fb;
  --ink-dim: #9fb2cc;
  --ink-faint: #64789a;
  --accent: #38bdf8;
  --accent-2: #22d3a6;
  --field-bg: rgba(255, 255, 255, 0.05);
  --field-border: rgba(255, 255, 255, 0.12);
  --green: #34d399;
  --amber: #fbbf24;
  --red: #f87171;
  --blue: #60a5fa;
  --radius: 16px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(56, 189, 248, 0.18), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(34, 211, 166, 0.12), transparent 55%),
    linear-gradient(180deg, var(--bg-2), var(--bg) 40%);
  background-attachment: fixed;
  min-height: 100vh;
  line-height: 1.5;
}

.app {
  max-width: 760px;
  margin: 0 auto;
  padding: 22px 16px calc(40px + env(safe-area-inset-bottom));
}

/* HERO */
.hero { text-align: center; padding: 18px 6px 26px; }
.hero-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 5px 12px;
  border-radius: 999px;
}
.hero-title {
  font-size: clamp(38px, 11vw, 56px);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 14px 0 8px;
  line-height: 1;
}
.hero-title span { color: var(--accent); }
.hero-sub {
  color: var(--ink-dim);
  max-width: 30ch;
  margin: 0 auto;
  font-size: 15px;
}
.hero-pills { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-top: 16px; }
.pill {
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-dim);
  background: var(--card);
  border: 1px solid var(--card-border);
  padding: 5px 11px;
  border-radius: 999px;
}

/* CARD */
.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 18px 16px;
  margin-bottom: 14px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.card-title {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin: 0 0 14px;
  display: flex;
  align-items: center;
  gap: 9px;
}
.dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.15);
}
.card-opt { color: var(--ink-faint); font-weight: 400; text-transform: none; letter-spacing: 0; font-size: 11px; }

/* SUBHEAD inside a card */
.subhead {
  font-size: 11.5px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--accent-2); margin: 18px 0 10px; padding-top: 14px;
  border-top: 1px solid var(--card-border); display: flex; align-items: center; gap: 8px;
}
.subhead:first-of-type { border-top: none; padding-top: 0; margin-top: 4px; }

/* PASTE box */
.paste-wrap { margin-bottom: 14px; }
textarea {
  width: 100%; font-family: "JetBrains Mono", monospace; font-size: 13px; color: var(--ink);
  background: var(--field-bg); border: 1px solid var(--field-border); border-radius: 11px;
  padding: 11px 13px; outline: none; resize: vertical; margin-top: 6px;
}
textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(56,189,248,0.18); }
.paste-actions { display: flex; align-items: center; gap: 12px; margin-top: 8px; }
.btn-mini {
  font-family: inherit; font-size: 13px; font-weight: 600; color: #04121f;
  background: var(--accent-2); border: none; border-radius: 9px; padding: 8px 14px; cursor: pointer;
}
.parse-msg { font-size: 12.5px; color: var(--ink-dim); }

/* UNITS row */
.units-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.units-label { font-size: 12px; color: var(--ink-faint); font-weight: 600; }

/* REFERENCES */
.refs-card { margin-top: 18px; }
.refs-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 9px; }
.refs-list li { font-size: 12.5px; line-height: 1.45; }
.refs-list a, .rec-ref a { color: var(--accent); text-decoration: none; }
.refs-list a:hover, .rec-ref a:hover { text-decoration: underline; }
.rec-ref a { font-weight: 500; }

/* FIELDS */
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field.full { margin-top: 12px; }
label {
  font-size: 12.5px;
  font-weight: 500;
  color: var(--ink-dim);
  display: flex; align-items: center; gap: 8px;
}
.opt { color: var(--ink-faint); font-weight: 400; font-size: 11px; }
input, select {
  width: 100%;
  font-family: inherit;
  font-size: 16px; /* prevents iOS zoom */
  color: var(--ink);
  background: var(--field-bg);
  border: 1px solid var(--field-border);
  border-radius: 11px;
  padding: 12px 13px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
  -webkit-appearance: none;
  appearance: none;
}
select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%239fb2cc' d='M6 8 0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 13px center;
  padding-right: 34px;
}
input:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.18);
}
input::placeholder { color: var(--ink-faint); }

.unit-toggle {
  font-family: inherit;
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 7px;
  padding: 2px 8px;
  cursor: pointer;
}

.pbw-readout {
  margin-top: 14px;
  font-size: 13.5px;
  color: var(--ink-dim);
  background: rgba(34, 211, 166, 0.07);
  border: 1px solid rgba(34, 211, 166, 0.18);
  border-radius: 11px;
  padding: 11px 13px;
}
.pbw-readout strong { color: var(--accent-2); }

/* SEGMENTED */
.seg {
  display: flex;
  background: var(--field-bg);
  border: 1px solid var(--field-border);
  border-radius: 11px;
  padding: 4px;
  margin-bottom: 14px;
  gap: 4px;
}
.seg-btn {
  flex: 1;
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink-dim);
  background: transparent;
  border: none;
  border-radius: 8px;
  padding: 10px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.seg-btn.active { background: var(--accent); color: #04121f; }

.vbg-note {
  font-size: 12.5px;
  color: var(--amber);
  background: rgba(251, 191, 36, 0.08);
  border: 1px solid rgba(251, 191, 36, 0.2);
  border-radius: 11px;
  padding: 10px 12px;
  margin: 14px 0 0;
}

/* ACTIONS */
.actions { display: flex; gap: 10px; margin: 4px 0 8px; }
.btn-primary {
  flex: 1;
  font-family: inherit;
  font-size: 16px;
  font-weight: 700;
  color: #04121f;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: none;
  border-radius: 13px;
  padding: 15px;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(56, 189, 248, 0.28);
  transition: transform 0.1s, box-shadow 0.2s;
}
.btn-primary:active { transform: translateY(1px); }
.btn-ghost {
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-dim);
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 13px;
  padding: 15px 20px;
  cursor: pointer;
}

/* RESULTS */
.results { margin-top: 20px; display: flex; flex-direction: column; gap: 14px; }
.results[hidden] { display: none; }

.summary-card {
  border-radius: var(--radius);
  padding: 18px 16px;
  border: 1px solid var(--card-border);
  background: var(--card);
}
.summary-head { font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-dim); font-weight: 700; margin-bottom: 10px; }
.dx-line { font-size: 17px; font-weight: 700; margin: 0 0 8px; color: var(--accent); }
.dx-sub { font-size: 13.5px; color: var(--ink-dim); margin: 0 0 5px; line-height: 1.5; }
.dx-sub b { color: var(--ink); font-weight: 600; }
.dx-sub.mixed { color: #fde68a; }
.dx-sub.vbgadj { color: var(--ink-faint); font-style: italic; }

/* METRICS */
.metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 9px;
}
.metric {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 11px 13px;
}
.m-k { font-size: 11px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-faint); font-weight: 600; }
.m-v { font-size: 16px; font-weight: 700; margin-top: 3px; font-family: "JetBrains Mono", monospace; }
.metric.m-good { border-color: rgba(52,211,153,0.32); }
.metric.m-good .m-v { color: var(--green); }
.metric.m-warn { border-color: rgba(251,191,36,0.32); }
.metric.m-warn .m-v { color: var(--amber); }
.metric.m-bad { border-color: rgba(248,113,113,0.4); }
.metric.m-bad .m-v { color: var(--red); }

.rec {
  border-radius: var(--radius);
  border: 1px solid var(--card-border);
  background: var(--card);
  overflow: hidden;
}
.rec-head {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 15px 16px;
  border-bottom: 1px solid var(--card-border);
}
.rec-icon {
  width: 34px; height: 34px; flex: none;
  border-radius: 10px;
  display: grid; place-items: center;
  font-size: 17px;
}
.rec-title { font-size: 15.5px; font-weight: 700; margin: 0; }
.rec-tag {
  margin-left: auto;
  font-size: 11px; font-weight: 700;
  padding: 4px 9px; border-radius: 999px;
  text-transform: uppercase; letter-spacing: 0.04em;
}
.tag-up { background: rgba(248, 113, 113, 0.15); color: var(--red); }
.tag-down { background: rgba(96, 165, 250, 0.15); color: var(--blue); }
.tag-ok { background: rgba(52, 211, 153, 0.15); color: var(--green); }
.tag-warn { background: rgba(251, 191, 36, 0.15); color: var(--amber); }

.rec-body { padding: 14px 16px; }
.rec-change {
  font-family: "JetBrains Mono", monospace;
  font-size: 15px;
  font-weight: 600;
  background: var(--field-bg);
  border: 1px solid var(--field-border);
  border-radius: 10px;
  padding: 11px 13px;
  margin-bottom: 12px;
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
}
.rec-change .arrow { color: var(--accent); }
.rec-change .to { color: var(--accent-2); }
.rec-reason { font-size: 14px; color: var(--ink); margin: 0 0 10px; }
.rec-reason strong { color: var(--accent); }
.rec-ref {
  font-size: 12px;
  color: var(--ink-faint);
  border-top: 1px dashed var(--card-border);
  padding-top: 10px;
  margin: 0;
}
.rec-ref b { color: var(--ink-dim); font-weight: 600; }

.flag {
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 13.5px;
  display: flex; gap: 10px; align-items: flex-start;
}
.flag-red { background: rgba(248, 113, 113, 0.1); border: 1px solid rgba(248, 113, 113, 0.3); color: #fecaca; }
.flag-amber { background: rgba(251, 191, 36, 0.09); border: 1px solid rgba(251, 191, 36, 0.28); color: #fde68a; }

.empty-hint {
  font-size: 13.5px; color: var(--amber);
  background: rgba(251, 191, 36, 0.08);
  border: 1px solid rgba(251, 191, 36, 0.22);
  border-radius: 12px; padding: 13px 15px;
}

/* FOOTER */
.footer { margin-top: 30px; }
.disclaimer {
  font-size: 12px;
  color: var(--ink-faint);
  line-height: 1.6;
  background: rgba(248, 113, 113, 0.05);
  border: 1px solid rgba(248, 113, 113, 0.18);
  border-radius: 12px;
  padding: 14px 15px;
}
.disclaimer strong { color: var(--red); }
.copyright {
  text-align: center;
  font-size: 12.5px;
  color: var(--ink-faint);
  margin-top: 16px;
  padding-top: 4px;
}

/* DESKTOP */
@media (min-width: 620px) {
  .app { padding: 36px 24px 60px; }
  .grid { grid-template-columns: 1fr 1fr 1fr; }
  .field.span2 { grid-column: span 2; }
  .metrics { grid-template-columns: repeat(3, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}