:root {
  --bg-main: #ffffff;
  --bg-alt: #f8fafc;
  --bg-accent: #0f172a;
  --text-main: #0f172a;
  --text-muted: #475569;
  --border-soft: #e5e7eb;

  /* Brand accents */
  --accent: #2563eb;
  --accent-2: #7c3aed;
  --accent-soft: #eef2ff;
}

/* =========================
   GLOBAL
========================= */

body {
  background:
    radial-gradient(900px 400px at 90% -10%, #ede9fe 0%, transparent 55%),
    radial-gradient(700px 300px at -10% 10%, #dbeafe 0%, transparent 50%),
    linear-gradient(180deg, #ffffff, #f8fafc);
  color: var(--text-main);
  line-height: 1.75;
}

h1, h2 {
  letter-spacing: -0.03em;
}

p {
  color: var(--text-muted);
}

/* =========================
   NAVBAR
========================= */

.cs-design-navbar {
  background: rgba(255,255,255,0.75);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(15,23,42,0.08);
}

.cs-brand {
  font-weight: 900;
  font-size: 1.35rem;
  letter-spacing: -0.04em;
  color: var(--text-main);
}

.cs-nav-link {
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding-bottom: 4px;
}

.cs-nav-link::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width .25s ease;
}

.cs-nav-link:hover::before {
  width: 100%;
}

/* =========================
   HERO
========================= */

.cs-hero {
  position: relative;
  overflow: hidden;
}

.cs-hero::after {
  content: "";
  position: absolute;
  right: -120px;
  top: 80px;
  width: 420px;
  height: 420px;
  background:
    linear-gradient(135deg, var(--accent), var(--accent-2));
  opacity: 0.06;
  border-radius: 80px;
  transform: rotate(25deg);
  pointer-events: none;
}

/* =========================
   CARDS
========================= */

.cs-card {
  position: relative;
  background: var(--bg-main);
  border-radius: 20px;
  border: 1px solid rgba(15,23,42,0.08);
  box-shadow:
    0 30px 60px rgba(15,23,42,0.12),
    inset 0 1px 0 rgba(255,255,255,0.8);
}

/* subtle offset accent */
.cs-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 20px;
  background:
    linear-gradient(135deg, var(--accent), var(--accent-2));
  opacity: 0.04;
  z-index: 0;
}

.cs-card > * {
  position: relative;
  z-index: 1;
}

/* =========================
   ACCENT HEADINGS
========================= */

.cs-accent-line {
  position: relative;
  padding-left: 18px;
}

.cs-accent-line::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.15em;
  width: 6px;
  height: 1.1em;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  border-radius: 3px;
}

/* =========================
   BADGES
========================= */

.cs-badge {
  background: linear-gradient(135deg, #eef2ff, #ede9fe);
  color: #312e81;
  border: 1px solid #ddd6fe;
  font-weight: 500;
  margin-right: 6px;
}

/* =========================
   BUTTONS
========================= */

.btn-outline-primary {
  --bs-btn-color: var(--accent);
  --bs-btn-border-color: var(--accent);
  --bs-btn-hover-bg: transparent;
}

.btn-outline-dark {
  --bs-btn-border-color: #0f172a;
}

/* =========================
   SECTIONS RHYTHM
========================= */

section:nth-of-type(even) {
  background: linear-gradient(180deg, transparent, var(--bg-alt));
}

/* =========================
   ACCORDION (FAQ)
========================= */

.cs-accordion-item {
  border-radius: 14px;
  border: 1px solid rgba(15,23,42,0.08);
  margin-bottom: 12px;
  overflow: hidden;
}

.cs-accordion-button {
  font-weight: 600;
  background: linear-gradient(180deg, #ffffff, #f8fafc);
}

.accordion-button:not(.collapsed) {
  background: linear-gradient(135deg, var(--accent-soft), #ede9fe);
}

/* =========================
   FOOTER
========================= */

.cs-footer {
  margin-top: 100px;
  padding: 40px 0;
  color: var(--text-muted);
  border-top: 1px solid rgba(15,23,42,0.08);
}