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

:root {
  --bg: #ffffff;
  --fg: #1e293b;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --primary-fg: #ffffff;
  --card: #f8fafc;
  --card-border: #e2e8f0;
  --muted: #64748b;
  --destructive: #ef4444;
  --radius: 1rem;
  --shadow-glow: 0 0 20px 0 rgba(59, 130, 246, 0.3);
  --max-w: 72rem;
}

body {
  font-family: 'DM Sans', system-ui, sans-serif;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  letter-spacing: -0.02em;
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
header {
  padding: 1.5rem 0;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.btn-share {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--primary);
  color: var(--primary-fg);
  border: none;
  border-radius: var(--radius);
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  font-family: 'DM Sans', sans-serif;
  cursor: pointer;
  box-shadow: var(--shadow-glow);
  transition: background 0.15s, transform 0.1s;
}

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

.btn-share:active {
  transform: scale(0.96);
}

.btn-share svg {
  flex-shrink: 0;
}

.btn-share.copied {
  background: #16a34a;
  box-shadow: 0 0 20px 0 rgba(22, 163, 74, 0.3);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  width: 2rem;
  height: 2rem;
  background: var(--primary);
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-fg);
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 0.875rem;
}

.logo-text {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
}

/* Hero */
.hero {
  padding: 4rem 0 6rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4rem;
  align-items: center;
}

@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.hero h1 {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
}

.hero h1 .accent {
  color: var(--primary);
}

.hero .subtitle {
  margin-top: 1.25rem;
  font-size: 1.125rem;
  color: var(--muted);
  max-width: 28rem;
  line-height: 1.7;
}

/* Form */
.form-wrap {
  margin-top: 2.5rem;
}

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

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.375rem;
}

.form-group textarea,
.form-group input[type="email"],
.form-group input[type="text"] {
  width: 100%;
  border: 1px solid var(--card-border);
  background: var(--card);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  font-family: 'DM Sans', sans-serif;
  color: var(--fg);
  transition: box-shadow 0.15s;
  outline: none;
}

.form-group textarea:focus,
.form-group input[type="email"]:focus,
.form-group input[type="text"]:focus {
  box-shadow: 0 0 0 2px var(--primary);
}

.form-group textarea {
  resize: vertical;
  min-height: 7.5rem;
}

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.checkbox-group input[type="checkbox"] {
  margin-top: 0.2rem;
  width: 1rem;
  height: 1rem;
  accent-color: var(--primary);
}

.checkbox-group label {
  font-size: 0.875rem;
  color: var(--muted);
}

.required {
  color: var(--destructive);
}

.error-msg {
  color: var(--destructive);
  font-size: 0.8125rem;
  margin-top: 0.25rem;
}

.btn-primary {
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--primary);
  color: var(--primary-fg);
  border: none;
  border-radius: var(--radius);
  padding: 0.875rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  font-family: 'DM Sans', sans-serif;
  cursor: pointer;
  box-shadow: var(--shadow-glow);
  transition: background 0.15s;
}

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

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

.btn-primary:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.btn-primary svg {
  width: 1.25rem;
  height: 1.25rem;
}

/* Success state */
.success-card {
  border: 1px solid var(--card-border);
  background: var(--card);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
}

.success-card svg {
  color: var(--primary);
  margin: 0 auto 1rem;
}

.success-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
}

.success-card p {
  color: var(--muted);
  margin-top: 0.5rem;
  font-size: 0.9375rem;
}

/* Hero Visual */
.visual-card {
  max-width: 24rem;
  margin: 0 auto;
  border: 1px solid var(--card-border);
  background: var(--card);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.visual-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.visual-icon {
  width: 2.5rem;
  height: 2.5rem;
  background: var(--primary);
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.visual-icon svg {
  color: var(--primary-fg);
  width: 1.25rem;
  height: 1.25rem;
}

.visual-header .title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.visual-header .sub {
  font-size: 0.75rem;
  color: var(--muted);
}

.link-box {
  border: 1px solid var(--card-border);
  background: var(--bg);
  border-radius: 0.5rem;
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
}

.link-box .label {
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 0.25rem;
}

.link-box .url {
  font-family: monospace;
  font-size: 0.875rem;
  color: var(--primary);
  font-weight: 500;
}

.visual-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 0.75rem;
}

.visual-row svg {
  width: 1rem;
  height: 1rem;
  color: var(--primary);
  flex-shrink: 0;
}

/* FAQ */
.faq {
  padding: 4rem 0 6rem;
}

.faq h2 {
  text-align: center;
  font-size: 1.875rem;
  font-weight: 700;
  margin-bottom: 3rem;
}

.faq-list {
  max-width: 42rem;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.faq-item {
  border: 1px solid var(--card-border);
  background: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
}

.faq-trigger {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  cursor: pointer;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--fg);
  text-align: left;
  letter-spacing: -0.02em;
}

.faq-trigger:hover {
  color: var(--primary);
}

.faq-trigger .chevron {
  width: 1.25rem;
  height: 1.25rem;
  transition: transform 0.2s;
  flex-shrink: 0;
  margin-left: 1rem;
}

.faq-item.open .faq-trigger .chevron {
  transform: rotate(180deg);
}

.faq-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.2s ease-out;
}

.faq-item.open .faq-content {
  max-height: 12rem;
}

.faq-answer {
  padding: 0 1.5rem 1.25rem;
  font-size: 0.9375rem;
  color: var(--muted);
  line-height: 1.7;
}

/* Footer */
footer {
  border-top: 1px solid var(--card-border);
  padding: 2rem 0;
  text-align: center;
  font-size: 0.875rem;
  color: var(--muted);
}

/* Spinner */
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.spinner {
  animation: spin 0.6s linear infinite;
}

.hidden {
  display: none;
}