:root {
  --bg-color: oklch(98% 0.01 200);
  --text-color: oklch(20% 0.02 200);
  --accent-color: oklch(60% 0.15 250);
  --surface-color: oklch(100% 0 0);
  --input-bg: oklch(96% 0.01 200);
  --input-border: oklch(85% 0.02 200);
  --shadow-color: rgba(0, 0, 0, 0.05);
  --transition-speed: 0.3s;
}

body.dark-theme {
  --bg-color: oklch(15% 0.02 200);
  --text-color: oklch(90% 0.01 200);
  --accent-color: oklch(70% 0.12 200);
  --surface-color: oklch(20% 0.03 200);
  --input-bg: oklch(25% 0.03 200);
  --input-border: oklch(35% 0.03 200);
  --shadow-color: rgba(0, 0, 0, 0.3);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  transition: background-color var(--transition-speed), color var(--transition-speed), border-color var(--transition-speed), transform 0.2s ease;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  padding: 4rem 1rem;
}

main {
  max-width: 800px;
  margin: 0 auto;
}

.hero {
  text-align: center;
  margin-bottom: 4rem;
}

h1 {
  font-size: clamp(2.5rem, 8vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

.subtitle {
  font-size: 1.25rem;
  opacity: 0.7;
}

.theme-toggle-btn {
  background-color: var(--surface-color);
  color: var(--text-color);
  border: 1px solid var(--input-border);
  padding: 0.6rem 1.2rem;
  border-radius: 50px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: 0 4px 12px var(--shadow-color);
}

.theme-toggle-btn:hover {
  transform: scale(1.05);
  border-color: var(--accent-color);
}

/* Form Styles */
.form-container {
  background-color: var(--surface-color);
  padding: 3rem;
  border-radius: 24px;
  box-shadow: 0 20px 40px var(--shadow-color);
  text-align: left;
}

.form-container h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.form-container p {
  margin-bottom: 2rem;
  opacity: 0.8;
}

.business-form {
  display: grid;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

label {
  font-size: 0.9rem;
  font-weight: 600;
  opacity: 0.9;
}

input, textarea {
  background-color: var(--input-bg);
  color: var(--text-color);
  border: 1px solid var(--input-border);
  padding: 1rem;
  border-radius: 12px;
  font-family: inherit;
  font-size: 1rem;
}

input:focus, textarea:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 4px color-mix(in oklch, var(--accent-color), transparent 80%);
}

.submit-btn {
  background-color: var(--accent-color);
  color: white;
  border: none;
  padding: 1.2rem;
  border-radius: 12px;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  margin-top: 1rem;
  box-shadow: 0 10px 20px color-mix(in oklch, var(--accent-color), transparent 70%);
}

.submit-btn:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
}

.submit-btn:active {
  transform: translateY(0);
}

@media (max-width: 600px) {
  .form-container {
    padding: 2rem 1.5rem;
  }
}