:root {
  --brand: #1a56db;
  --brand-dark: #1444a8;
  --bg: #f9fafb;
  --surface: #ffffff;
  --text: #1f2937;
  --text-muted: #6b7280;
  --border: #d1d5db;
  --radius: 8px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 0;
  text-align: center;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.logo a {
  color: inherit;
  text-decoration: none;
}

.dot {
  color: var(--brand);
}

.tagline {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-top: 0.25rem;
}

/* Main */
main {
  flex: 1;
  padding: 2rem 0;
}

.intro {
  margin-bottom: 2rem;
}

.intro h2 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
}

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

/* Form */
.upload-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
}

.required {
  color: #dc2626;
}

input[type="email"],
input[type="file"],
select {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  background: var(--bg);
}

input[type="email"]:focus,
select:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.15);
}

input[type="file"] {
  padding: 0.5rem;
  cursor: pointer;
}

.help-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.checkbox-group label {
  font-weight: 400;
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
  margin-top: 0.25rem;
  flex-shrink: 0;
}

.btn-submit {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  border: none;
  padding: 0.7rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s;
}

.btn-submit:hover {
  background: var(--brand-dark);
}

/* Content sections */
.how-it-works,
.what-you-get,
.why-vmodel {
  margin-bottom: 2rem;
}

.how-it-works h2,
.what-you-get h2,
.why-vmodel h2,
.privacy-note h2 {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
}

.privacy-note {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 2rem;
}

.privacy-note p {
  font-size: 0.9rem;
  color: var(--text);
}

.about {
  text-align: center;
  margin-bottom: 1rem;
}

.about-text {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.about-text a {
  color: var(--brand);
  text-decoration: none;
}

.about-text a:hover {
  text-decoration: underline;
}

ol, ul {
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.4rem;
}

/* Success page */
.success-message {
  text-align: center;
  padding: 3rem 0;
}

.success-message h2 {
  font-size: 1.5rem;
  color: #059669;
  margin-bottom: 0.75rem;
}

.success-message p {
  margin-bottom: 0.75rem;
}

.success-message .note {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 1rem 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Responsive */
@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

  .logo {
    font-size: 1.5rem;
  }

  .upload-section {
    padding: 1rem;
  }
}