/* ===== RESET & BASE ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg:        #0f1117;
  --color-surface:   #181c27;
  --color-border:    #242938;
  --color-accent:    #3b82f6;
  --color-accent-h:  #2563eb;
  --color-text:      #e2e8f0;
  --color-muted:     #94a3b8;
  --radius:          12px;
  --max-w:           900px;
  --gap:             2rem;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.7;
}

/* ===== LAYOUT ===== */
.container {
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.section {
  padding-block: 5rem;
}

.section--alt {
  background: var(--color-surface);
}

/* ===== TYPOGRAPHY ===== */
h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
}

h2 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 1.5rem;
}

h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
}

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

.section-intro {
  max-width: 55ch;
  margin-bottom: 2.5rem;
  font-size: 1.05rem;
}

/* ===== BUTTON ===== */
.btn {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  text-decoration: none;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 0.2s, transform 0.15s;
}

.btn:hover {
  background: var(--color-accent-h);
  transform: translateY(-1px);
}

.btn--large {
  font-size: 1.05rem;
  padding: 1rem 2.25rem;
}

/* ===== HERO ===== */
.hero {
  padding-block: 7rem 6rem;
  background:
    radial-gradient(ellipse 70% 50% at 60% 40%, rgba(59,130,246,.15) 0%, transparent 70%),
    var(--color-bg);
}

.hero-label {
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.hero-sub {
  max-width: 50ch;
  font-size: 1.1rem;
  margin-bottom: 2.5rem;
  color: var(--color-muted);
}

/* ===== CARDS ===== */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--gap);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color 0.2s, transform 0.2s;
}

.card:hover {
  border-color: var(--color-accent);
  transform: translateY(-3px);
}

.card-icon {
  font-size: 1.75rem;
  margin-bottom: 1rem;
  line-height: 1;
}

.card h3 {
  color: var(--color-text);
}

/* ===== AUDIENCE ===== */
.audience {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.audience-item {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.audience-icon {
  font-size: 1.75rem;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.audience-item h4 {
  color: var(--color-text);
}

/* ===== CONTACT ===== */
.contact-box {
  text-align: center;
  max-width: 560px;
}

.contact-box h2 {
  margin-bottom: 0.75rem;
}

.contact-box p {
  margin-bottom: 2rem;
  font-size: 1.05rem;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-block: 1.75rem;
  text-align: center;
}

.footer p {
  font-size: 0.85rem;
  color: var(--color-muted);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 600px) {
  .hero {
    padding-block: 5rem 4rem;
  }

  .section {
    padding-block: 3.5rem;
  }

  .cards {
    grid-template-columns: 1fr;
  }
}