/* ============================================
   checkbig.com — Styles
   Brand: Ink Navy / Signal Blue / Insight Teal
   Fonts: Manrope (Headlines) + Inter (Body)
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Primary */
  --ink-navy: #0F172A;
  --signal-blue: #2563EB;
  --cloud-white: #F8FAFC;

  /* Secondary */
  --slate: #475569;
  --mist: #E2E8F0;
  --surface-blue: #EFF6FF;
  --soft-mint: #ECFEFF;

  /* Accent */
  --insight-teal: #14B8A6;
  --focus-amber: #F59E0B;
  --alert-coral: #F97316;

  /* Functional */
  --success: #16A34A;
  --error: #DC2626;
  --info: #0EA5E9;

  /* Gradient */
  --brand-gradient: linear-gradient(135deg, #0F172A 0%, #2563EB 62%, #14B8A6 100%);

  /* Layout */
  --max-width: 1200px;
  --hero-max: 1280px;
  --text-max: 640px;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--ink-navy);
  background: var(--cloud-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5 {
  font-family: 'Manrope', 'Inter', sans-serif;
  font-weight: 700;
  line-height: 1.2;
}

a { color: var(--signal-blue); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--insight-teal); }

img { max-width: 100%; height: auto; display: block; }

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Header --- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 250, 252, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--mist);
  transition: background 0.3s;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  font-family: 'Manrope', sans-serif;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--ink-navy);
  letter-spacing: -0.02em;
}

.logo span { color: var(--signal-blue); }

.nav { display: flex; align-items: center; gap: 32px; }

.nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--slate);
  transition: color 0.2s;
}

.nav a:hover { color: var(--signal-blue); }

.nav-cta {
  background: var(--signal-blue);
  color: #fff !important;
  padding: 10px 22px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: background 0.2s, transform 0.15s;
}

.nav-cta:hover { background: #1D4ED8; color: #fff !important; transform: translateY(-1px); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ink-navy);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

/* --- Hero --- */
.hero {
  padding: 96px 0 80px;
  background: var(--cloud-white);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  max-width: var(--hero-max);
}

.hero-eyebrow {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--signal-blue);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--slate);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: var(--text-max);
}

.hero-ctas { display: flex; gap: 16px; align-items: center; margin-bottom: 24px; }

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--signal-blue);
  color: #fff;
  padding: 14px 32px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
  background: #1D4ED8;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.35);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--signal-blue);
  padding: 14px 32px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  border: 2px solid var(--mist);
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, transform 0.15s;
}

.btn-secondary:hover {
  border-color: var(--signal-blue);
  transform: translateY(-2px);
}

.hero-micro {
  font-size: 0.85rem;
  color: var(--slate);
}

.hero-visual {
  position: relative;
}

.hero-mockup {
  background: #fff;
  border-radius: 16px;
  border: 1px solid var(--mist);
  box-shadow: 0 24px 64px rgba(15, 23, 42, 0.08), 0 4px 16px rgba(15, 23, 42, 0.04);
  padding: 32px;
  position: relative;
}

.mockup-bar {
  display: flex;
  gap: 6px;
  margin-bottom: 20px;
}

.mockup-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--mist);
}

.mockup-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mockup-upload {
  background: var(--surface-blue);
  border: 2px dashed var(--signal-blue);
  border-radius: 12px;
  padding: 24px;
  text-align: center;
  color: var(--signal-blue);
  font-weight: 600;
  font-size: 0.9rem;
}

.mockup-summary {
  background: var(--soft-mint);
  border-radius: 10px;
  padding: 16px;
  font-size: 0.85rem;
  color: var(--ink-navy);
}

.mockup-summary strong { color: var(--insight-teal); }

.mockup-chart {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  height: 80px;
  padding: 12px 0;
}

.chart-bar {
  flex: 1;
  border-radius: 4px 4px 0 0;
  transition: height 0.6s ease;
}

.hero-badge {
  position: absolute;
  background: #fff;
  border: 1px solid var(--mist);
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 0.8rem;
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.08);
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge-icon {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.badge-1 { top: 20%; right: -24px; }
.badge-2 { bottom: 15%; left: -20px; }

/* --- Trust Strip --- */
.trust-strip {
  padding: 40px 0;
  background: var(--surface-blue);
  border-top: 1px solid var(--mist);
  border-bottom: 1px solid var(--mist);
}

.trust-strip .container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.trust-item {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink-navy);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.trust-icon {
  width: 40px;
  height: 40px;
  background: var(--signal-blue);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.2rem;
}

/* --- Sections --- */
.section { padding: 96px 0; }
.section-alt { background: var(--cloud-white); }
.section-light { background: #fff; }

.section-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--signal-blue);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
  max-width: 720px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--slate);
  line-height: 1.7;
  max-width: var(--text-max);
  margin-bottom: 48px;
}

.section-center { text-align: center; }
.section-center .section-title,
.section-center .section-subtitle { margin-left: auto; margin-right: auto; }

/* --- Problem Section --- */
.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.pain-point {
  padding: 20px 0;
  border-bottom: 1px solid var(--mist);
}

.pain-point:last-child { border-bottom: none; }

.pain-point h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.pain-point p {
  color: var(--slate);
  font-size: 0.95rem;
}

.problem-visual {
  background: #fff;
  border: 1px solid var(--mist);
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 8px 32px rgba(15, 23, 42, 0.04);
}

.spreadsheet-mock {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--mist);
  border-radius: 8px;
  overflow: hidden;
  font-size: 0.75rem;
}

.spreadsheet-mock div {
  background: #fff;
  padding: 10px 8px;
  text-align: center;
  color: var(--slate);
}

.spreadsheet-mock .header-cell {
  background: var(--surface-blue);
  font-weight: 600;
  color: var(--ink-navy);
}

.spreadsheet-mock .alert-cell {
  background: #FEF3C7;
  color: var(--focus-amber);
  font-weight: 600;
}

.spreadsheet-overlay {
  margin-top: 16px;
  background: var(--soft-mint);
  border-radius: 8px;
  padding: 14px 16px;
  font-size: 0.85rem;
  color: var(--ink-navy);
  border-left: 3px solid var(--insight-teal);
}

/* --- How It Works --- */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  margin-top: 16px;
}

.step {
  text-align: center;
  position: relative;
}

.step-number {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--surface-blue);
  color: var(--signal-blue);
  font-family: 'Manrope', sans-serif;
  font-size: 1.4rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.step h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.step p {
  color: var(--slate);
  font-size: 0.95rem;
  max-width: 320px;
  margin: 0 auto;
}

/* --- Features --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  background: #fff;
  border: 1px solid var(--mist);
  border-radius: 14px;
  padding: 32px 28px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.06);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--surface-blue);
  color: var(--signal-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.05rem;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--slate);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* --- Use Cases --- */
.usecases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.usecase-card {
  background: #fff;
  border: 1px solid var(--mist);
  border-radius: 14px;
  padding: 32px;
  transition: transform 0.2s;
}

.usecase-card:hover { transform: translateY(-2px); }

.usecase-card h3 { font-size: 1.1rem; margin-bottom: 10px; }

.usecase-card p { color: var(--slate); font-size: 0.9rem; }

/* --- Services --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.service-card {
  background: #fff;
  border: 1px solid var(--mist);
  border-radius: 14px;
  padding: 36px;
}

.service-price {
  font-family: 'Manrope', sans-serif;
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--signal-blue);
  margin-bottom: 4px;
}

.service-price-note {
  font-size: 0.8rem;
  color: var(--slate);
  margin-bottom: 16px;
}

.service-card h3 { font-size: 1.2rem; margin-bottom: 12px; }

.service-card p {
  color: var(--slate);
  font-size: 0.9rem;
  margin-bottom: 24px;
  line-height: 1.6;
}

.service-card .btn-secondary { width: 100%; justify-content: center; }

/* --- Pricing --- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}

.pricing-card {
  background: #fff;
  border: 1px solid var(--mist);
  border-radius: 14px;
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
}

.pricing-card.featured {
  border-color: var(--signal-blue);
  box-shadow: 0 8px 32px rgba(37, 99, 235, 0.12);
  position: relative;
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--signal-blue);
  color: #fff;
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pricing-name {
  font-family: 'Manrope', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.pricing-price {
  font-family: 'Manrope', sans-serif;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--ink-navy);
  margin-bottom: 4px;
  font-variant-numeric: tabular-nums;
}

.pricing-price span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--slate);
}

.pricing-desc {
  color: var(--slate);
  font-size: 0.85rem;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--mist);
}

.pricing-features {
  list-style: none;
  flex: 1;
  margin-bottom: 28px;
}

.pricing-features li {
  font-size: 0.9rem;
  color: var(--slate);
  padding: 6px 0;
  padding-left: 24px;
  position: relative;
}

.pricing-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--insight-teal);
  font-weight: 700;
}

.pricing-card .btn-primary,
.pricing-card .btn-secondary { width: 100%; justify-content: center; }

/* --- FAQ --- */
.faq-list { max-width: 780px; margin: 0 auto; }

.faq-item {
  border-bottom: 1px solid var(--mist);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 24px 40px 24px 0;
  text-align: left;
  cursor: pointer;
  font-family: 'Manrope', sans-serif;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink-navy);
  position: relative;
  transition: color 0.2s;
}

.faq-question::after {
  content: '+';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--slate);
  transition: transform 0.3s;
}

.faq-item.open .faq-question::after {
  content: '−';
}

.faq-question:hover { color: var(--signal-blue); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding-bottom: 24px;
}

.faq-answer p {
  color: var(--slate);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* --- Final CTA --- */
.final-cta {
  padding: 96px 0;
  background: var(--brand-gradient);
  color: #fff;
  text-align: center;
}

.final-cta .section-title {
  color: #fff;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.final-cta p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1.1rem;
  max-width: var(--text-max);
  margin: 0 auto 36px;
  line-height: 1.7;
}

.final-cta .btn-primary {
  background: #fff;
  color: var(--signal-blue);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

.final-cta .btn-primary:hover {
  background: #F1F5F9;
  color: var(--signal-blue);
}

.final-cta .btn-secondary {
  border-color: rgba(255, 255, 255, 0.4);
  color: #fff;
}

.final-cta .btn-secondary:hover {
  border-color: #fff;
  color: #fff;
}

.final-cta .hero-micro { color: rgba(255, 255, 255, 0.7); }

/* --- Footer --- */
.footer {
  background: var(--ink-navy);
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .logo { color: #fff; margin-bottom: 16px; display: inline-block; }
.footer-brand .logo span { color: var(--insight-teal); }

.footer-desc {
  font-size: 0.9rem;
  line-height: 1.6;
  max-width: 320px;
}

.footer-col h4 {
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}

.footer-col a {
  display: block;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
  padding: 4px 0;
  transition: color 0.2s;
}

.footer-col a:hover { color: #fff; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
}

.footer-legal { display: flex; gap: 24px; }
.footer-legal a { color: rgba(255, 255, 255, 0.5); }
.footer-legal a:hover { color: #fff; }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .hero .container { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { order: -1; max-width: 520px; margin: 0 auto; }
  .problem-grid { grid-template-columns: 1fr; gap: 48px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .hero { padding: 64px 0 48px; }

  .nav { display: none; }
  .nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--cloud-white);
    border-bottom: 1px solid var(--mist);
    padding: 24px;
    gap: 16px;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
  }

  .hamburger { display: flex; }

  .trust-strip .container { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .steps-grid { grid-template-columns: 1fr; gap: 36px; }
  .features-grid { grid-template-columns: 1fr; }
  .usecases-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .hero-ctas { flex-direction: column; align-items: stretch; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
  .hero-badge { display: none; }
}