/* =====================================================================
   Vishwaas AI — Brand Stylesheet
   Source: https://vishwaas.ai (production tailwind config + inline CSS)
   Last refreshed: 2026-05-12
   See: BRAND_GUIDELINES.md for the full reference.
   ===================================================================== */

:root {
  /* Surface colors */
  --charcoal:          #0B0D11;   /* page background — deepest */
  --charcoal-light:    #151820;   /* card / panel surface */
  --charcoal-lighter:  #1E222D;   /* hover, divider, scrollbar */

  /* Accent colors */
  --neon-blue:         #00F0FF;   /* primary action / glow */
  --neon-blue-hover:   #00C2CF;   /* hover state for blue */
  --neon-purple:       #8B5CF6;   /* secondary gradient accent */

  /* Text */
  --text-default:      #D1D5DB;   /* body on dark */
  --text-muted:        #9CA3AF;   /* secondary / nav */
  --text-strong:       #FFFFFF;   /* headings */
  --text-faint:        #6B7280;   /* tertiary captions */

  /* Borders */
  --border-faint:      rgba(255, 255, 255, 0.05);
  --border-soft:       rgba(255, 255, 255, 0.10);
  --border-neon:       #00F0FF;

  /* Shadows */
  --shadow-neon:       0 0 15px rgba(0, 240, 255, 0.30), 0 0 30px rgba(0, 240, 255, 0.10);
  --shadow-neon-hover: 0 0 20px rgba(0, 240, 255, 0.50), 0 0 40px rgba(0, 240, 255, 0.20);
  --shadow-glow:       0 0 60px -15px rgba(0, 240, 255, 0.30);
  --shadow-purple:     0 0 60px -15px rgba(139, 92, 246, 0.35);

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  /* Type */
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
}

/* ---------- Reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--charcoal);
  color: var(--text-default);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
  position: relative;
  overflow-x: hidden;
}

::selection { background: var(--neon-blue); color: var(--charcoal); }

h1, h2, h3, h4, h5, h6 {
  color: var(--text-strong);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 0.5em;
}

h1 { font-size: clamp(2.25rem, 4.5vw, 3.75rem); font-weight: 800; }
h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h4 { font-size: 1.125rem; }

p { margin: 0 0 1rem; }

a { color: var(--neon-blue); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--neon-blue-hover); }

code, kbd, pre {
  font-family: ui-monospace, 'JetBrains Mono', 'Fira Code', monospace;
  background: var(--charcoal-lighter);
  color: var(--neon-blue);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.875em;
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar             { width: 10px; height: 10px; }
::-webkit-scrollbar-track       { background: var(--charcoal); }
::-webkit-scrollbar-thumb       { background: var(--charcoal-lighter); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--neon-blue); }

/* ---------- Signature backgrounds ---------- */
.bg-grid-pattern {
  background-image:
    linear-gradient(to right,  rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

.ambient-glow-top,
.ambient-glow-bottom {
  position: fixed;
  pointer-events: none;
  z-index: -10;
  border-radius: 50%;
  filter: blur(120px);
}
.ambient-glow-top {
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(100%, 32rem);
  height: 500px;
  background: rgba(0, 240, 255, 0.20);
}
.ambient-glow-bottom {
  bottom: 0;
  right: 0;
  width: 500px;
  height: 500px;
  background: rgba(139, 92, 246, 0.10);
  filter: blur(150px);
}

/* ---------- Navigation ---------- */
.nav-bar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  background: rgba(11, 13, 17, 0.80);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-faint);
  transition: all 0.3s ease;
}
.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}
.nav-logo img { height: 3rem; width: auto; display: block; }
.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}
.nav-links a {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
}
.nav-links a:hover { color: var(--neon-blue); }

/* ---------- Layout helpers ---------- */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}
.section {
  padding: 5rem 0;
  position: relative;
}
.section--tight { padding: 3rem 0; }

.eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--neon-blue);
  padding: 0.4rem 0.9rem;
  border: 1px solid rgba(0, 240, 255, 0.30);
  border-radius: var(--radius-pill);
  background: rgba(0, 240, 255, 0.05);
}

.lead {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 56ch;
}

.gradient-text {
  background: linear-gradient(90deg, var(--neon-blue) 0%, var(--neon-purple) 100%);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* ---------- Cards ---------- */
.card {
  background: var(--charcoal-light);
  border: 1px solid var(--border-faint);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.card:hover {
  border-color: rgba(0, 240, 255, 0.30);
  box-shadow: var(--shadow-glow);
  transform: translateY(-3px);
}
.card--featured {
  border-color: rgba(0, 240, 255, 0.40);
  box-shadow: var(--shadow-neon);
  background: linear-gradient(180deg, rgba(0, 240, 255, 0.04) 0%, var(--charcoal-light) 100%);
}
.card--purple {
  border-color: rgba(139, 92, 246, 0.40);
  box-shadow: var(--shadow-purple);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
}
.card-title { font-size: 1.35rem; font-weight: 700; color: var(--text-strong); margin: 0; }
.card-subtitle { color: var(--text-muted); font-size: 0.875rem; margin: 0.25rem 0 0; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
  font-family: inherit;
}
.btn-primary {
  background: rgba(0, 240, 255, 0.10);
  border-color: var(--neon-blue);
  color: var(--neon-blue);
  box-shadow: var(--shadow-neon);
}
.btn-primary:hover {
  background: rgba(0, 240, 255, 0.18);
  box-shadow: var(--shadow-neon-hover);
  color: var(--neon-blue);
}
.btn-ghost {
  background: transparent;
  border-color: var(--border-soft);
  color: var(--text-default);
}
.btn-ghost:hover {
  border-color: var(--neon-blue);
  color: var(--neon-blue);
}
.btn-pill { border-radius: var(--radius-pill); padding: 0.6rem 1.5rem; }

/* ---------- Tabs (tier selector) ---------- */
.tabs {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.4rem;
  background: var(--charcoal-light);
  border: 1px solid var(--border-faint);
  border-radius: var(--radius-pill);
}
.tab-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  padding: 0.55rem 1.4rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}
.tab-btn:hover { color: var(--text-strong); }
.tab-btn.active {
  background: rgba(0, 240, 255, 0.10);
  border-color: var(--neon-blue);
  color: var(--neon-blue);
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.15);
}

.tab-content { display: none; opacity: 0; transition: opacity 0.4s ease, transform 0.4s ease; transform: translateY(10px); }
.tab-content.active { display: block; opacity: 1; transform: translateY(0); }

/* ---------- Pricing / tier blocks ---------- */
.tier-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.tier {
  background: var(--charcoal-light);
  border: 1px solid var(--border-faint);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  position: relative;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.tier:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 240, 255, 0.30);
  box-shadow: var(--shadow-glow);
}
.tier--starter   { border-top: 3px solid #34D399; }
.tier--pro       { border-top: 3px solid var(--neon-blue); box-shadow: var(--shadow-neon); }
.tier--enterprise{ border-top: 3px solid var(--neon-purple); box-shadow: var(--shadow-purple); }

.tier-name { font-size: 0.85rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-muted); margin: 0; }
.tier-headline { font-size: 1.65rem; font-weight: 800; color: var(--text-strong); margin: 0.5rem 0 0.25rem; }
.tier-tagline { font-size: 0.95rem; color: var(--text-muted); margin: 0 0 1.25rem; }
.tier-limit { font-size: 0.8rem; font-weight: 600; color: var(--neon-blue); margin-bottom: 1rem; }

.tier-features { list-style: none; padding: 0; margin: 0; flex: 1; }
.tier-features li {
  position: relative;
  padding: 0.5rem 0 0.5rem 1.6rem;
  font-size: 0.92rem;
  color: var(--text-default);
  border-bottom: 1px dashed var(--border-faint);
}
.tier-features li:last-child { border-bottom: 0; }
.tier-features li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--neon-blue);
  font-weight: 700;
}

.badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-pill);
  background: rgba(0, 240, 255, 0.10);
  color: var(--neon-blue);
  border: 1px solid rgba(0, 240, 255, 0.30);
}
.badge-purple { background: rgba(139, 92, 246, 0.12); color: var(--neon-purple); border-color: rgba(139, 92, 246, 0.40); }
.badge-green { background: rgba(52, 211, 153, 0.12); color: #34D399; border-color: rgba(52, 211, 153, 0.40); }

/* ---------- Comparison table ---------- */
.compare-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.9rem;
  background: var(--charcoal-light);
  border: 1px solid var(--border-faint);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.compare-table thead th {
  background: var(--charcoal-lighter);
  color: var(--text-strong);
  font-weight: 700;
  text-align: left;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-faint);
  position: sticky;
  top: 80px;
  z-index: 5;
}
.compare-table tbody td {
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--border-faint);
  color: var(--text-default);
  vertical-align: top;
}
.compare-table tbody tr:hover td { background: rgba(255, 255, 255, 0.015); }
.compare-table td.center, .compare-table th.center { text-align: center; }
.compare-table .yes { color: var(--neon-blue); font-weight: 600; }
.compare-table .partial { color: #FCD34D; font-weight: 600; }
.compare-table .no { color: var(--text-faint); }
.compare-table .row-section td {
  background: rgba(0, 240, 255, 0.04);
  color: var(--neon-blue);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ---------- Chart canvas containers ---------- */
.chart-card {
  background: var(--charcoal-light);
  border: 1px solid var(--border-faint);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  height: 100%;
}
.chart-title { color: var(--text-strong); font-weight: 700; font-size: 1.1rem; margin: 0 0 0.25rem; }
.chart-sub { color: var(--text-muted); font-size: 0.85rem; margin: 0 0 1rem; }
.chart-host { position: relative; height: 320px; }
.chart-host--tall { height: 420px; }

/* ---------- Ladder diagram ---------- */
.ladder {
  display: flex;
  flex-direction: column-reverse;
  gap: 0.75rem;
  margin: 2rem 0;
}
.ladder-rung {
  background: var(--charcoal-light);
  border: 1px solid var(--border-faint);
  border-left: 4px solid var(--neon-blue);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.ladder-rung--starter { border-left-color: #34D399; }
.ladder-rung--pro { border-left-color: var(--neon-blue); }
.ladder-rung--ent { border-left-color: var(--neon-purple); }
.ladder-rung .ladder-tier { font-weight: 700; color: var(--text-strong); min-width: 110px; }
.ladder-rung .ladder-desc { color: var(--text-muted); font-size: 0.92rem; }

/* ---------- Section meta ---------- */
.section-head {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}
.section-head .eyebrow { margin: 0; }
.section-head h2 { margin: 0; }
.section-head p.lead { margin: 0; }

.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.25rem; }

/* ---------- KPI tiles ---------- */
.kpi {
  background: var(--charcoal-light);
  border: 1px solid var(--border-faint);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
}
.kpi-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-strong);
  line-height: 1.1;
}
.kpi-label {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 0.4rem;
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border-faint);
  background: var(--charcoal);
  padding: 2.5rem 0;
  margin-top: 4rem;
}
.footer .container { display: flex; flex-wrap: wrap; gap: 1.5rem; justify-content: space-between; align-items: center; }
.footer-meta { color: var(--text-muted); font-size: 0.85rem; }
.footer-meta strong { color: var(--text-default); }

/* ---------- Utility ---------- */
.text-muted { color: var(--text-muted); }
.text-strong { color: var(--text-strong); }
.text-neon { color: var(--neon-blue); }
.text-purple { color: var(--neon-purple); }
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-0 { margin-bottom: 0; }
.center { text-align: center; }
.hidden { display: none; }

/* ---------- Print ---------- */
@media print {
  .nav-bar, .ambient-glow-top, .ambient-glow-bottom, .tabs { display: none !important; }
  body { background: white; color: #0B0D11; }
  .card, .tier, .chart-card { box-shadow: none; border-color: #E5E7EB; background: white; }
  h1, h2, h3 { color: #0B0D11; }
  .tab-content { display: block !important; opacity: 1; transform: none; page-break-inside: avoid; }
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .section { padding: 3.5rem 0; }
  .compare-table thead th { top: 0; }
}