*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg: #0a0a0f;
  --color-surface: #13131a;
  --color-border: #1e1e2e;
  --color-primary: #7c3aed;
  --color-primary-hover: #6d28d9;
  --color-accent: #a78bfa;
  --color-text: #e2e8f0;
  --color-muted: #94a3b8;
  --color-white: #ffffff;
  --font: 'Inter', sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.2s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* HEADER */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-white);
  letter-spacing: -0.5px;
}

.logo-accent {
  color: var(--color-accent);
}

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background-color var(--transition), color var(--transition), transform var(--transition);
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-muted);
  border: 1px solid var(--color-border);
}

.btn-ghost:hover {
  color: var(--color-text);
  border-color: var(--color-muted);
}

.btn-large {
  font-size: 1rem;
  padding: 14px 28px;
}

.btn-full {
  width: 100%;
}

/* HERO */
.hero {
  padding: 96px 0 80px;
  text-align: center;
  background: radial-gradient(ellipse at 50% 0%, rgba(124, 58, 237, 0.15) 0%, transparent 70%);
}

.hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: rgba(124, 58, 237, 0.15);
  border: 1px solid rgba(124, 58, 237, 0.3);
  color: var(--color-accent);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 6px 16px;
  border-radius: 999px;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.15;
  letter-spacing: -1px;
  max-width: 700px;
}

.highlight {
  color: var(--color-accent);
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--color-muted);
  max-width: 560px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

/* FEATURES */
.features {
  padding: 80px 0;
  border-top: 1px solid var(--color-border);
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--color-white);
  text-align: center;
  letter-spacing: -0.5px;
}

.section-desc {
  text-align: center;
  color: var(--color-muted);
  margin-top: 10px;
  font-size: 1rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 48px;
}

.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color var(--transition), transform var(--transition);
}

.card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.card-icon {
  font-size: 1.8rem;
  margin-bottom: 14px;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 8px;
}

.card-desc {
  font-size: 0.9rem;
  color: var(--color-muted);
  line-height: 1.5;
}

/* CTA / CONTACT */
.cta-section {
  padding: 80px 0;
  border-top: 1px solid var(--color-border);
}

.cta-inner {
  max-width: 560px;
  text-align: center;
}

.cta-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: -0.5px;
}

.cta-desc {
  color: var(--color-muted);
  margin-top: 10px;
  margin-bottom: 36px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  text-align: left;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.input {
  font-family: var(--font);
  font-size: 0.95rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  padding: 12px 16px;
  width: 100%;
  outline: none;
  transition: border-color var(--transition);
  resize: none;
}

.input::placeholder {
  color: var(--color-muted);
}

.input:focus {
  border-color: var(--color-primary);
}

.textarea {
  display: block;
}

.form-feedback {
  font-size: 0.875rem;
  min-height: 20px;
  text-align: center;
}

.form-feedback.success {
  color: #4ade80;
}

.form-feedback.error {
  color: #f87171;
}

/* FOOTER */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

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

/* RESPONSIVE */
@media (max-width: 600px) {
  .hero {
    padding: 64px 0 56px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}