/* ==========================================================================
   Healthlyzer design system
   Palette: sage-tinted paper + forest green + warm amber accent.
   Display face: Fraunces (used sparingly, headings only)
   Body face: IBM Plex Sans
   Utility face: IBM Plex Mono (badges, labels, stats)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,600;9..144,700&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@500;600&display=swap');

:root{
  --bg: #f5f8f3;
  --surface: #ffffff;
  --surface-alt: #edf3e9;
  --ink: #16241c;
  --muted: #5c6f61;
  --primary: #1f6f4f;
  --primary-dark: #143f2d;
  --primary-light: #e6f2ec;
  --accent: #d98a3d;
  --accent-light: #fbeedc;
  --danger: #b3452f;
  --danger-light: #f8e9e4;
  --success: #1f6f4f;
  --border: #dbe3d6;
  --shadow: 0 1px 2px rgba(22,36,28,0.04), 0 8px 24px rgba(22,36,28,0.05);
  --radius: 14px;
}

*,*::before,*::after{ box-sizing: border-box; }
html,body{ margin:0; padding:0; }
body{
  background: var(--bg);
  color: var(--ink);
  font-family: 'IBM Plex Sans', sans-serif;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a{ color: inherit; }
h1,h2,h3{ font-family:'Fraunces', serif; font-weight: 600; letter-spacing: -0.01em; margin: 0; }
p{ margin: 0 0 0.75em; }
.eyebrow{
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--primary);
}
.container{ max-width: 980px; margin: 0 auto; padding: 0 32px; width: 100%; }

/* ---------- header / nav ---------- */
.site-header{
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 20;
}
.nav-row{
  display:flex; align-items:center; justify-content:space-between;
  max-width: 980px; margin: 0 auto; padding: 18px 32px;
}
.brand{ display:flex; align-items:center; gap: 10px; text-decoration:none; }
.brand-mark{
  width: 34px; height: 34px; border-radius: 10px;
  background: var(--primary); color:#fff;
  display:flex; align-items:center; justify-content:center;
  font-size: 1.05rem;
}
.brand-name{ font-family:'Fraunces', serif; font-weight:600; font-size:1.1rem; color: var(--ink); }
.nav-links{ display:flex; align-items:center; gap: 6px; }
.nav-link{
  padding: 8px 14px; border-radius: 999px; text-decoration:none;
  font-size: 0.88rem; font-weight: 500; color: var(--muted);
  transition: background 0.15s, color 0.15s;
}
.nav-link:hover{ background: var(--surface-alt); color: var(--ink); }
.nav-link.is-active{ background: var(--primary-light); color: var(--primary-dark); }
.nav-cta{
  background: var(--primary); color:#fff !important; padding: 8px 18px; border-radius: 999px;
  font-size: 0.88rem; font-weight: 600; text-decoration:none; margin-left: 4px;
}
.nav-cta:hover{ background: var(--primary-dark); }
.nav-ghost{
  border: 1px solid var(--border); padding: 8px 16px; border-radius:999px;
  font-size:0.88rem; font-weight:500; text-decoration:none; color: var(--ink);
}

/* ---------- flash messages ---------- */
.flash-wrap{ max-width: 980px; margin: 18px auto 0; padding: 0 32px; }
.flash{
  padding: 12px 18px; border-radius: 10px; font-size: 0.9rem; margin-bottom: 10px;
  border-left: 3px solid transparent;
}
.flash-error{ background: var(--danger-light); color: var(--danger); border-color: var(--danger); }
.flash-success{ background: var(--primary-light); color: var(--primary-dark); border-color: var(--primary); }

/* ---------- hero ---------- */
.hero{ padding: 56px 0 24px; text-align:center; }
.hero .eyebrow{ display:inline-block; background: var(--primary-light); padding:6px 16px; border-radius:999px; margin-bottom: 20px; }
.hero h1{ font-size: clamp(1.9rem, 4vw, 2.6rem); line-height: 1.15; margin-bottom: 14px; color: var(--ink); }
.hero h1 em{ font-style: normal; color: var(--primary); }
.hero p{ color: var(--muted); max-width: 520px; margin: 0 auto; }

.disclaimer{
  max-width: 980px; margin: 0 auto 28px; padding: 12px 32px;
}
.disclaimer-inner{
  background: var(--accent-light); border: 1px solid #f0dcb8; color:#7a4f16;
  border-radius: 10px; padding: 12px 18px; font-size: 0.86rem;
}
.disclaimer-inner strong{ color:#5c3a0c; }

/* ---------- main / card ---------- */
main{ flex:1; }
.page-pad{ padding: 8px 0 72px; }
.card{
  background: var(--surface); border:1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow:hidden;
}
.card-header{ padding: 22px 28px; border-bottom:1px solid var(--border); display:flex; align-items:center; justify-content:space-between; }
.card-title{ font-family:'IBM Plex Mono', monospace; font-size:0.78rem; letter-spacing:0.08em; text-transform:uppercase; color:var(--primary-dark); }
.card-body{ padding: 28px; }

/* ---------- symptom selector ---------- */
.symptom-group{ margin-bottom: 26px; }
.symptom-group:last-child{ margin-bottom: 0; }
.group-title{
  font-family:'IBM Plex Mono', monospace; font-size:0.72rem; letter-spacing:0.1em; text-transform:uppercase;
  color: var(--muted); margin-bottom: 12px; display:flex; align-items:center; gap:8px;
}
.group-title::after{ content:''; flex:1; height:1px; background: var(--border); }
.group-grid{ display:grid; grid-template-columns: repeat(auto-fill, minmax(190px,1fr)); gap: 10px; }
.symptom-toggle input{ position:absolute; opacity:0; width:0; height:0; }
.symptom-toggle label{
  display:flex; align-items:center; gap:10px; padding: 12px 14px;
  background: var(--surface-alt); border: 1px solid var(--border); border-radius: 10px;
  cursor:pointer; transition: all 0.15s ease; font-size: 0.88rem;
}
.symptom-toggle label:hover{ border-color: var(--primary); }
.symptom-toggle input:checked + label{
  background: var(--primary-light); border-color: var(--primary); color: var(--primary-dark); font-weight:500;
}
.sym-icon{ font-size: 1.1rem; }

.agree-row{
  display:flex; align-items:flex-start; gap:10px; margin: 24px 0 18px;
  padding: 12px 16px; background: var(--surface-alt); border-radius: 10px; font-size: 0.85rem; color: var(--muted);
}
.agree-row input{ margin-top: 3px; accent-color: var(--primary); }
.agree-row a{ color: var(--primary-dark); font-weight:500; }

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding: 13px 22px; border-radius: 10px; border: none; cursor:pointer;
  font-family:'IBM Plex Sans', sans-serif; font-weight: 600; font-size: 0.92rem;
  text-decoration:none; transition: transform 0.1s ease, background 0.15s ease;
}
.btn-primary{ background: var(--primary); color:#fff; width:100%; }
.btn-primary:hover{ background: var(--primary-dark); }
.btn-secondary{ background: var(--surface-alt); color: var(--ink); border:1px solid var(--border); }

/* ---------- result ---------- */
.result{ margin-top: 22px; border-radius: var(--radius); border:1px solid var(--primary); background: var(--primary-light); padding: 24px; }
.result.is-error{ border-color: var(--danger); background: var(--danger-light); }
.result-tag{ font-family:'IBM Plex Mono',monospace; font-size:0.7rem; letter-spacing:0.1em; text-transform:uppercase; color:var(--primary-dark); margin-bottom: 8px; }
.result.is-error .result-tag{ color: var(--danger); }
.result-name{ font-family:'Fraunces', serif; font-size: 1.7rem; font-weight:600; margin-bottom: 12px; }
.result-grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 12px; }
.result-card{ background:var(--surface); border:1px solid var(--border); border-radius:10px; padding:10px 14px; }
.result-card-label{ font-family:'IBM Plex Mono',monospace; font-size:0.65rem; letter-spacing:0.08em; text-transform:uppercase; color:var(--muted); margin-bottom:4px; }
.result-card-val{ font-size:0.88rem; }
.result-note{ font-size:0.82rem; color: var(--muted); margin-top:14px; padding-top:14px; border-top:1px solid var(--border); }

/* ---------- forms (login/signup/profile) ---------- */
.form-page{ max-width: 420px; margin: 48px auto; }
.field{ margin-bottom: 16px; }
.field label{ display:block; font-size:0.85rem; font-weight:500; margin-bottom: 6px; color: var(--ink); }
.field input{
  width:100%; padding: 11px 14px; border-radius: 10px; border:1px solid var(--border);
  font-family:'IBM Plex Sans', sans-serif; font-size:0.92rem; background: var(--surface);
}
.field input:focus{ outline:2px solid var(--primary); outline-offset:1px; border-color: var(--primary); }
.form-footnote{ text-align:center; font-size:0.85rem; color: var(--muted); margin-top: 18px; }
.form-footnote a{ color: var(--primary-dark); font-weight:500; text-decoration:none; }

/* ---------- about page ---------- */
.stat-row{ display:flex; gap: 14px; flex-wrap:wrap; margin: 28px 0; }
.stat-pill{ flex:1; min-width:140px; background:var(--surface); border:1px solid var(--border); border-radius: var(--radius); padding: 18px; text-align:center; box-shadow: var(--shadow); }
.stat-pill .num{ font-family:'Fraunces',serif; font-size:1.8rem; color: var(--primary); }
.stat-pill .lbl{ font-size:0.76rem; color: var(--muted); text-transform:uppercase; letter-spacing:0.06em; margin-top:4px; }
.disease-grid{ display:grid; grid-template-columns: repeat(auto-fill, minmax(220px,1fr)); gap:14px; margin-top: 20px; }
.disease-card{ background: var(--surface); border:1px solid var(--border); border-radius: 12px; padding: 16px 18px; }
.disease-card h3{ font-size:1rem; margin-bottom:6px; }
.disease-card p{ font-size:0.82rem; color: var(--muted); margin:0; }
.team-list{ display:flex; flex-wrap:wrap; gap:8px; margin-top: 10px; }
.team-chip{ background: var(--surface-alt); border-radius:999px; padding:6px 14px; font-size:0.82rem; }

/* ---------- dashboard ---------- */
.dash-grid{ display:grid; grid-template-columns: 1fr 1fr 1fr; gap: 14px; margin-bottom: 24px; }
.history-table{ width:100%; border-collapse: collapse; font-size: 0.88rem; }
.history-table th{ text-align:left; font-family:'IBM Plex Mono',monospace; font-size:0.68rem; letter-spacing:0.08em; text-transform:uppercase; color:var(--muted); padding: 10px 14px; border-bottom:1px solid var(--border); }
.history-table td{ padding: 12px 14px; border-bottom:1px solid var(--border); vertical-align: top; }
.history-table tr:last-child td{ border-bottom:none; }
.tag-pill{ display:inline-block; background: var(--primary-light); color: var(--primary-dark); border-radius:999px; padding:3px 12px; font-size:0.78rem; font-weight:500; }
.empty-state{ text-align:center; padding: 48px 20px; color: var(--muted); }
.empty-state .big{ font-size:2rem; margin-bottom: 10px; }

/* ---------- footer ---------- */
footer{
  border-top: 1px solid var(--border); background: var(--surface);
  padding: 22px 0; margin-top: auto;
}
.footer-row{ max-width:980px; margin:0 auto; padding:0 32px; display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:10px; }
.footer-row .eyebrow{ color: var(--muted); }
.footer-links{ display:flex; gap:18px; }
.footer-links a{ font-size:0.82rem; color: var(--muted); text-decoration:none; }
.footer-links a:hover{ color: var(--primary-dark); }

/* ---------- legal pages ---------- */
.legal h2{ font-size: 1.05rem; margin: 30px 0 12px; }
.legal p, .legal li{ color: var(--muted); font-size:0.92rem; }
.legal ul{ padding-left: 20px; }
.legal .callout{ background: var(--primary-light); border-left:3px solid var(--primary); border-radius: 8px; padding: 14px 18px; margin: 16px 0; font-size:0.88rem; color: var(--ink); }
.legal .callout.warn{ background: var(--danger-light); border-color: var(--danger); }

@media (max-width: 680px){
  .nav-row{ padding: 14px 20px; flex-wrap: wrap; gap: 10px; }
  .container, .flash-wrap, .footer-row, .disclaimer{ padding-left:20px; padding-right:20px; }
  .result-grid{ grid-template-columns: 1fr; }
  .dash-grid{ grid-template-columns: 1fr; }
  .nav-links{ flex-wrap: wrap; }
}