CSS Landing Page Styling – Complete Design System

:root {
  /* Colors */
  --color-primary:       #1572B6;
  --color-primary-dark:  #0f5fa0;
  --color-accent:        #FFD43B;
  --color-text:          #1a1a1a;
  --color-text-muted:    #666;
  --color-bg:            #ffffff;
  --color-bg-alt:        #f8f9fa;
  --color-border:        #e0e0e0;

  /* Typography */
  --font:        system-ui, -apple-system, Segoe UI, sans-serif;
  --text-sm:     0.875rem;
  --text-base:   1rem;
  --text-lg:     1.125rem;
  --text-xl:     1.25rem;
  --h1:          clamp(2rem, 5vw + 0.5rem, 3.5rem);
  --h2:          clamp(1.5rem, 3vw + 0.3rem, 2.25rem);
  --leading:     1.7;

  /* Spacing */
  --space-sm:    0.5rem;
  --space-md:    1rem;
  --space-lg:    2rem;
  --space-xl:    4rem;
  --space-2xl:   6rem;

  /* Other */
  --radius:      10px;
  --radius-lg:   16px;
  --shadow-card: 0 4px 16px rgba(0,0,0,.08);
  --shadow-lg:   0 12px 40px rgba(0,0,0,.15);
  --transition:  0.2s cubic-bezier(.4,0,.2,1);
  --max-width:   1100px;
}

/* Global reset */
*, *::before, *::after { box-sizing: border-box; }
body { font-family: var(--font); color: var(--color-text); line-height: var(--leading); background: var(--color-bg); margin: 0; }
img  { display: block; max-width: 100%; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-lg); }

.hero {
  background: linear-gradient(135deg, #0a1628 0%, #1572B6 60%, #1a3a5c 100%);
  color: #fff;
  padding: var(--space-2xl) var(--space-lg);
  text-align: center;
  position: relative;
  overflow: hidden;
}
/* Decorative background circles */
.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  opacity: .12;
}
.hero::before { width: 600px; height: 600px; background: var(--color-accent); top: -200px; right: -200px; }
.hero::after  { width: 400px; height: 400px; background: #fff;               bottom: -150px; left: -100px; }

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 9999px;
  padding: .35rem 1rem;
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-lg);
}
.hero__title {
  font-size: var(--h1);
  font-weight: 800;
  line-height: 1.15;
  margin: 0 auto var(--space-md);
  max-width: 760px;
}
.hero__title .accent { color: var(--color-accent); }
.hero__subtitle {
  font-size: var(--text-lg);
  color: rgba(255,255,255,.82);
  max-width: 560px;
  margin: 0 auto var(--space-lg);
}
.hero__actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}
.hero__stats {
  display: flex;
  gap: var(--space-xl);
  justify-content: center;
  margin-top: var(--space-xl);
  flex-wrap: wrap;
}
.hero__stat-num   { font-size: 2rem; font-weight: 800; color: var(--color-accent); display: block; }
.hero__stat-label { font-size: var(--text-sm); color: rgba(255,255,255,.7); }

.features {
  padding: var(--space-2xl) var(--space-lg);
  background: var(--color-bg-alt);
}
.section-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}
.section-header h2 { font-size: var(--h2); margin-bottom: var(--space-sm); }
.section-header p  { color: var(--color-text-muted); max-width: 560px; margin: 0 auto; }

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}
.feature-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 1.75rem;
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}
.feature-card__icon {
  width: 52px;
  height: 52px;
  background: rgba(21,114,182,.1);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
}
.feature-card h3 { margin: 0 0 .5rem; font-size: 1.05rem; }
.feature-card p  { margin: 0; font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.6; }

.pricing {
  padding: var(--space-2xl) var(--space-lg);
}
.pricing__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  max-width: 900px;
  margin: 0 auto;
}
.pricing-card {
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: transform var(--transition);
}
/* Popular card — highlighted */
.pricing-card--popular {
  border-color: var(--color-primary);
  position: relative;
}
.pricing-card--popular::before {
  content: "Most Popular";
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: #fff;
  font-size: .72rem;
  font-weight: 700;
  padding: .25rem .9rem;
  border-radius: 9999px;
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: .06em;
}
.pricing-card:hover { transform: translateY(-4px); }

.pricing-card__tier  { font-size: .8rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--color-primary); margin-bottom: .5rem; }
.pricing-card__price { font-size: 2.5rem; font-weight: 800; line-height: 1; }
.pricing-card__price sub { font-size: 1rem; font-weight: 400; vertical-align: top; margin-top: .5rem; color: var(--color-text-muted); }
.pricing-card__period { font-size: var(--text-sm); color: var(--color-text-muted); margin-bottom: 1.25rem; }
.pricing-card__list { list-style: none; padding: 0; margin: 0 0 1.5rem; font-size: .875rem; }
.pricing-card__list li { padding: .4rem 0; border-bottom: 1px solid var(--color-border); display: flex; gap: .5rem; }
.pricing-card__list li::before { content: '✓'; color: #2e7d32; font-weight: 700; flex-shrink: 0; }

.testimonials { padding: var(--space-2xl) var(--space-lg); background: var(--color-bg-alt); }

.testimonials__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}
.testimonial-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  position: relative;
}
.testimonial-card::before {
  content: "\201C";                /* left double quote */
  position: absolute;
  top: .75rem;
  left: 1rem;
  font-size: 3.5rem;
  line-height: 1;
  color: var(--color-primary);
  opacity: .2;
  font-family: Georgia, serif;
}
.testimonial-card__text   { font-size: .9rem; line-height: 1.7; margin: 0 0 1.25rem; padding-top: 1.25rem; }
.testimonial-card__author { display: flex; align-items: center; gap: .75rem; }
.testimonial-card__avatar { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; background: var(--color-primary); display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 700; flex-shrink: 0; }
.testimonial-card__name   { font-weight: 700; font-size: .9rem; }
.testimonial-card__role   { font-size: .78rem; color: var(--color-text-muted); }

.cta-banner {
  background: linear-gradient(135deg, var(--color-primary), #0a1628);
  color: #fff;
  padding: var(--space-2xl) var(--space-lg);
  text-align: center;
}
.cta-banner h2 { font-size: var(--h2); margin-bottom: var(--space-md); }
.cta-banner p  { color: rgba(255,255,255,.8); max-width: 520px; margin: 0 auto var(--space-lg); }
.cta-banner__actions { display: flex; gap: var(--space-md); justify-content: center; flex-wrap: wrap; }

/* Primary CTA button */
.btn-cta-primary {
  background: var(--color-accent);
  color: #1a1a2e;
  padding: .85rem 2.25rem;
  border-radius: 6px;
  font-weight: 800;
  font-size: 1.05rem;
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition);
}
.btn-cta-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(255,212,59,.4); }

/* Secondary CTA */
.btn-cta-secondary {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,.4);
  padding: .85rem 2.25rem;
  border-radius: 6px;
  font-weight: 600;
  text-decoration: none;
  transition: border-color var(--transition);
}
.btn-cta-secondary:hover { border-color: rgba(255,255,255,.8); }

.footer {
  background: #0a1628;
  color: rgba(255,255,255,.7);
  padding: var(--space-xl) var(--space-lg) var(--space-lg);
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: var(--space-xl);
}
.footer__brand { max-width: 280px; }
.footer__brand p { font-size: .875rem; line-height: 1.7; margin-top: .75rem; }

.footer__col h4 { color: #fff; font-size: .9rem; margin-bottom: .75rem; text-transform: uppercase; letter-spacing: .06em; font-weight: 700; }
.footer__links  { list-style: none; padding: 0; margin: 0; }
.footer__links li { margin-bottom: .4rem; }
.footer__links a { color: rgba(255,255,255,.6); text-decoration: none; font-size: .875rem; transition: color .15s; }
.footer__links a:hover { color: #fff; }

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: var(--space-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: .5rem;
  font-size: .82rem;
}

@media (max-width: 768px) {
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}
@media (max-width: 480px) {
  .footer__grid { grid-template-columns: 1fr; }
}