/* ==================================================================
   MoleBench — premium light theme
   Clean white surfaces, generous whitespace, refined typography and
   soft layered shadows (research-grade SaaS polish). Deep-blue hero +
   a sparing yellow accent keep the brand. Numerics stay monospace.
   ================================================================== */
:root {
  /* brand + base palette */
  --blue:        #14304d;   /* deep navy — headings, hero            */
  --blue-dark:   #0e2238;
  --blue-light:  #21507c;
  --accent:      #2f6fed;   /* modern blue — links, primary actions  */
  --accent-dim:  #1b54c4;
  --yellow:      #f4c542;   /* sparing accent / key CTA              */
  --yellow-dark: #dca916;

  --bg:          #fbfcfe;   /* page base, near-white                 */
  --bg-light:    #f5f8fc;   /* alt sections                          */
  --bg-soft:     #fafcff;
  --panel:       #ffffff;   /* cards                                 */

  --ink:         #0f1b2a;
  --text-dark:   #1d2a3a;   /* primary text                          */
  --text-muted:  #5c6b7e;   /* secondary text                        */
  --border:      #e4e9f0;
  --border-soft: #eef2f7;

  --shadow-sm:   0 1px 2px rgba(16,27,42,0.04), 0 1px 3px rgba(16,27,42,0.05);
  --shadow:      0 4px 14px rgba(16,27,42,0.06), 0 2px 5px rgba(16,27,42,0.04);
  --shadow-lg:   0 22px 48px -16px rgba(16,27,42,0.20), 0 8px 18px -10px rgba(16,27,42,0.12);

  --radius:    10px;
  --radius-lg: 16px;
  --max: 1200px;

  /* legacy "mb" tokens (155 refs across the site) remapped to light */
  --mb-ink:      var(--bg);
  --mb-panel:    var(--panel);
  --mb-panel-2:  var(--bg-light);
  --mb-line:     var(--border);
  --mb-line2:    var(--border-soft);
  --mb-cyan:     var(--accent);
  --mb-cyan-dim: var(--accent-dim);
  --mb-text:     var(--text-dark);
  --mb-text-dim: var(--text-muted);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); line-height: 1.65;
  font-family: 'Open Sans', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  color: var(--text-dark);
  letter-spacing: -0.003em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3, h4 {
  font-family: 'Poppins', system-ui, sans-serif;
  color: var(--blue); line-height: 1.18; font-weight: 700;
  letter-spacing: -0.022em;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dim); }
.container { max-width: var(--max); margin: 0 auto; padding: 0 1.5rem; }

/* ===== Header — airy, sticky, frosted ===== */
.site-header {
  background: rgba(255,255,255,0.80);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border-soft);
  padding: 0.8rem 0; position: sticky; top: 0; z-index: 50;
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand {
  font-family: 'Poppins', sans-serif; font-weight: 700; color: var(--blue);
  font-size: 1.2rem; text-decoration: none; letter-spacing: -0.01em;
  display: inline-flex; align-items: center; gap: 0.5rem;
}
.brand::before { content: "⬡"; color: var(--accent); font-size: 1.45rem; line-height: 1; }
.nav-links { display: flex; gap: 1.35rem; font-size: 0.92rem; align-items: center; flex-wrap: wrap; }
.nav-links a { color: var(--text-muted); text-decoration: none; font-weight: 500; transition: color 0.15s ease; }
.nav-links a:hover { color: var(--blue); }
.nav-links a.cta {
  background: var(--yellow); color: #3a2e05; border: 1px solid var(--yellow-dark);
  padding: 0.4rem 0.85rem; border-radius: 8px; font-weight: 600;
}
.nav-links a.cta:hover { background: var(--yellow-dark); }
.auth-chip { display: inline-flex; align-items: center; gap: 0.4rem; }

/* ===== Hero / page-header — premium deep-blue band ===== */
.page-header {
  background:
    radial-gradient(1150px 460px at 84% -28%, rgba(47,111,237,0.34), transparent 60%),
    radial-gradient(720px 380px at 2% 128%, rgba(244,197,66,0.10), transparent 55%),
    linear-gradient(158deg, #173a60 0%, #0f2742 72%);
  color: #fff; padding: 4.75rem 0 4.25rem;
  position: relative; overflow: hidden;
}
.page-header::after {
  content: "⬡"; position: absolute; right: -2.5rem; top: 50%; transform: translateY(-50%);
  font-size: 24rem; color: rgba(255,255,255,0.045); line-height: 1; pointer-events: none; z-index: 0;
}
.page-header .container { position: relative; z-index: 1; }
.page-header h1 {
  color: #fff; margin: 0 0 0.8rem; letter-spacing: -0.03em;
  font-size: clamp(2.1rem, 4.2vw, 3.05rem);
}
.page-header p { color: rgba(255,255,255,0.85); margin: 0; max-width: 660px; font-size: 1.13rem; line-height: 1.6; }
.page-header p a { color: #ffe08a; text-decoration: underline; }

/* ===== Sections — generous whitespace ===== */
section { padding: 3.75rem 0; }
section.alt { background: var(--bg-light); border-top: 1px solid var(--border-soft); border-bottom: 1px solid var(--border-soft); }
h2 { font-size: clamp(1.55rem, 2.6vw, 2.15rem); }
.section-title { font-size: clamp(1.5rem, 2.4vw, 2rem); margin: 0 0 0.5rem; color: var(--blue); }
.section-lead { color: var(--text-muted); max-width: 720px; margin: 0 0 2rem; font-size: 1.05rem; }

/* ===== Grids ===== */
.grid { display: grid; gap: 1.4rem; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

/* ===== Cards — soft premium panels that lift on hover ===== */
.card, .form-card, .tier {
  background: var(--panel); border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg); padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: var(--border); }
.card h3, .tier h3 { margin: 0 0 0.5rem; font-size: 1.12rem; color: var(--blue); }
.card p { margin: 0 0 0.85rem; font-size: 0.96rem; color: var(--text-muted); }
.card p:last-child { margin: 0; }
.card .meta { font-size: 0.8rem; color: var(--text-muted); margin: 0 0 0.6rem; text-transform: uppercase; letter-spacing: 0.06em; }
.step-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--blue)); color: #fff;
  font-family: 'Poppins', sans-serif; font-weight: 700; margin-bottom: 0.6rem;
  box-shadow: var(--shadow-sm);
}

/* ===== Buttons — refined with subtle depth ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.45rem;
  font-family: 'Poppins', sans-serif; font-weight: 600; font-size: 0.95rem;
  padding: 0.72rem 1.3rem; border-radius: 10px; text-decoration: none;
  cursor: pointer; border: 1px solid transparent;
  transition: transform 0.12s ease, box-shadow 0.16s ease, background 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}
.btn:active { transform: translateY(1px); }
.btn-sm { padding: 0.42rem 0.75rem; font-size: 0.85rem; border-radius: 8px; }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent);
  box-shadow: 0 1px 2px rgba(47,111,237,0.30), 0 6px 16px -6px rgba(47,111,237,0.50); }
.btn-primary:hover { background: var(--accent-dim); color: #fff; }
.btn-yellow { background: var(--yellow); color: #3a2e05; border-color: var(--yellow-dark);
  box-shadow: 0 6px 18px -6px rgba(244,197,66,0.65); }
.btn-yellow:hover { background: var(--yellow-dark); color: #2a2204; }
.btn-outline { background: var(--panel); color: var(--blue); border-color: var(--border); box-shadow: var(--shadow-sm); }
.btn-outline:hover { background: var(--bg-light); color: var(--accent); border-color: var(--accent); }
.btn-outline-light { background: rgba(255,255,255,0.10); color: #fff; border-color: rgba(255,255,255,0.5);
  backdrop-filter: blur(4px); }
.btn-outline-light:hover { background: rgba(255,255,255,0.20); }

/* ===== CTA band — premium deep-blue ===== */
.cta-band {
  background:
    radial-gradient(820px 320px at 50% -45%, rgba(47,111,237,0.36), transparent 60%),
    linear-gradient(158deg, #173a60, #0f2742);
  color: #fff; padding: 4rem 0; text-align: center;
}
.cta-band h2 { color: #fff; font-size: clamp(1.6rem, 3vw, 2.2rem); margin: 0 0 0.6rem; letter-spacing: -0.02em; }
.cta-band p { color: rgba(255,255,255,0.85); margin: 0 0 1.6rem; font-size: 1.05rem; }
.btn-row { display: inline-flex; flex-wrap: wrap; gap: 0.85rem; justify-content: center; }

/* ===== Footer ===== */
.site-footer {
  padding: 2rem 0; background: var(--panel); border-top: 1px solid var(--border-soft);
  color: var(--text-muted); font-size: 0.86rem; text-align: center;
}
.site-footer a { color: var(--text-muted); margin: 0 0.5rem; }
.site-footer a:hover { color: var(--accent); }

/* ===== Forms — clean light inputs ===== */
.form-row { margin-bottom: 1rem; }
.form-row label { display: block; font-weight: 600; color: var(--blue); margin-bottom: 0.3rem; font-size: 0.92rem; }
.form-row input, .form-row select, .form-row textarea {
  width: 100%; padding: 0.65rem 0.8rem; border: 1px solid var(--border); border-radius: 10px;
  font: inherit; font-size: 0.95rem; background: var(--panel); color: var(--text-dark);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(47,111,237,0.15);
}
.form-row textarea { min-height: 120px; resize: vertical; }
.form-card { padding: 2rem; max-width: 600px; margin: 0 auto; }

/* ===== Pricing ===== */
.pricing-grid { display: grid; gap: 1.4rem; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.tier { padding: 1.6rem; position: relative; }
.tier.featured { border-color: var(--yellow); border-width: 2px; }
.tier .badge {
  position: absolute; top: -11px; left: 50%; transform: translateX(-50%);
  background: var(--yellow); color: #3a2e05; font-family: 'Poppins', sans-serif;
  font-weight: 700; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em;
  padding: 0.22rem 0.65rem; border-radius: 6px;
}
.tier .price { font-family: 'Poppins', sans-serif; font-size: 2.3rem; font-weight: 700; color: var(--blue); margin: 0.5rem 0; }
.tier .unit { color: var(--text-muted); font-size: 0.85rem; }
.tier ul { padding-left: 1.2rem; margin: 1rem 0; color: var(--text-dark); font-size: 0.92rem; }
.tier ul li { margin-bottom: 0.35rem; }

/* ===== Utility ===== */
.note { font-size: 0.9rem; color: var(--text-muted); }
.text-center { text-align: center; }
.muted { color: var(--text-muted); }
.section-lead, .note, .muted, .card .meta { color: var(--text-muted); }

/* ===== Computed-data readouts — premium mono on a dark slab ===== */
code, pre, kbd, samp,
#calcOut, #advOut, #irOut, #orbOut, #dftOut,
.mono, .data, .readout, .result, [data-readout] {
  font-family: 'JetBrains Mono', 'SFMono-Regular', ui-monospace, Menlo, Consolas, 'Liberation Mono', monospace;
}
code, pre, kbd, samp {
  background: #0f2742; color: #cfe0ff; border: 1px solid #173a60; border-radius: 8px;
}
pre { padding: 0.9rem 1.05rem; overflow: auto; box-shadow: var(--shadow-sm); }
code { padding: 0.06rem 0.4rem; }

/* SVG charts (IR / NMR / PES) read on light panels */
svg text { fill: var(--text-muted); }