:root {
  --bg: #ffffff;
  --bg-alt: #f5f8f9;
  --card: #ffffff;
  --card-border: #e3e9ec;
  --text: #0f1e35;
  --text-dim: #57626f;
  --text-dimmer: #8996a3;
  --accent: #14b8a6;
  --accent2: #10b981;
  --grad: linear-gradient(135deg, var(--accent), var(--accent2));
  --radius: 16px;
  --maxw: 1180px;
  --shadow-sm: 0 2px 12px rgba(15,30,53,0.05);
  --shadow-md: 0 12px 28px rgba(15,30,53,0.14);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.5;
  overflow-x: hidden;
}

h1, h2, h3 {
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  margin: 0 0 0.5em;
  letter-spacing: -0.02em;
  color: var(--text);
}

p { color: var(--text-dim); margin: 0 0 1em; }
a { color: var(--accent); }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
  white-space: nowrap;
  font-family: inherit;
}
.btn-primary {
  background: var(--grad);
  color: #ffffff;
  box-shadow: 0 6px 18px rgba(20,184,166,0.28);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(20,184,166,0.4); }
.btn-primary:disabled { opacity: 0.6; cursor: default; transform: none; }
.btn-ghost {
  background: #ffffff;
  color: var(--text);
  border: 1.5px solid var(--card-border);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.btn-soft {
  background: rgba(20,184,166,0.12);
  color: var(--accent);
  border: 1px solid rgba(20,184,166,0.2);
}
.btn-soft:hover { background: rgba(20,184,166,0.2); }
.btn-small { padding: 9px 18px; font-size: 12.5px; }
.btn-large { padding: 16px 32px; font-size: 16px; }

.eyebrow {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

/* Header */
.site-header {
  padding: 22px 0;
  border-bottom: 1px solid var(--card-border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.01em;
}

/* Hero */
.hero { padding: 72px 0 60px; }
.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}
.hero h1 { font-size: clamp(30px, 4vw, 46px); line-height: 1.1; margin-bottom: 20px; }
.hero-sub { font-size: 16.5px; max-width: 520px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin: 26px 0 16px; }
.hero-note { font-size: 13px; color: var(--text-dimmer); }
.hero-note a { color: var(--text-dimmer); text-decoration: underline; }

.identity-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin: 8px 0 4px;
}
.identity-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-radius: 14px;
  border: 1.5px solid var(--card-border);
  background: var(--bg-alt);
}
.identity-name {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 15px;
  color: var(--text);
}
.identity-arrow { font-size: 18px; color: var(--text-dimmer); }
.identity-logo-mw { height: 16px; width: auto; display: block; }
.mturk-wordmark { font-family: Georgia, 'Times New Roman', serif; font-size: 14px; white-space: nowrap; }
.mturk-amazon { color: #0f1e35; font-weight: 700; }
.mturk-mech { color: #e47911; font-weight: 700; margin-left: 3px; }
@media (max-width: 480px) {
  .identity-row { gap: 10px; }
  .identity-badge { padding: 8px 12px; }
}

.hero-visual {
  aspect-ratio: 1;
  border-radius: 24px;
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle at 50% 50%, #0f2a3a, #0a1622 70%);
}
.globe-viz { position: absolute; inset: 0; width: 100%; height: 100%; cursor: grab; }
.globe-viz:active { cursor: grabbing; }
.globe-face-anchor { position: relative; pointer-events: none; }
.globe-face {
  position: absolute;
  left: 0;
  top: 0;
  transform: translate(-50%, -50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid #fff;
  box-shadow: 0 4px 14px rgba(15,30,53,0.35);
  opacity: 0;
  animation: globe-face-fade 4.5s ease-in-out infinite;
}
.globe-face img { width: 100%; height: 100%; object-fit: cover; display: block; }
@keyframes globe-face-fade {
  0%, 100% { opacity: 0; transform: translate(-50%, -50%) scale(0.6); }
  15%, 75% { opacity: 1; transform: translate(-50%, -50%) scale(1); }
  90% { opacity: 0; transform: translate(-50%, -50%) scale(0.8); }
}
@media (prefers-reduced-motion: reduce) {
  .globe-face { animation: none; opacity: 1; }
}

/* Form section */
.form-section { padding: 20px 0 100px; }
.form-card {
  background: #ffffff;
  border: 1px solid var(--card-border);
  border-radius: 24px;
  padding: 48px;
  box-shadow: var(--shadow-sm);
  max-width: 840px;
  margin: 0 auto;
}
.form-card-head { text-align: center; margin-bottom: 34px; }
.form-card-head h2 { font-size: clamp(24px, 3vw, 30px); }
.form-card-head .section-sub { max-width: 520px; margin: 0 auto; }

.link-form { display: flex; flex-direction: column; gap: 22px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.field-row-3 { grid-template-columns: 1fr 1fr 1fr; }
.field-row-4 { grid-template-columns: 1fr 1fr 1fr 1fr; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field label { font-size: 13px; font-weight: 700; color: var(--text-dim); }
.field .req { color: var(--accent2); }
.field input, .field select {
  padding: 12px 14px;
  border-radius: 12px;
  border: 1.5px solid var(--card-border);
  font-family: inherit;
  font-size: 14.5px;
  color: var(--text);
  background: #fff;
  transition: border-color 0.2s ease;
}
.field input:focus, .field select:focus { outline: none; border-color: var(--accent); }
.field-hint { font-size: 12.5px; color: var(--text-dimmer); margin: 2px 0 0; }
.field-hint a { font-weight: 600; }

.optional-divider {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--text-dimmer);
  font-size: 12.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 4px 0;
}
.optional-divider::before, .optional-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--card-border);
}

.pill-group { display: flex; gap: 8px; flex-wrap: wrap; }
.pill {
  padding: 10px 16px;
  border-radius: 999px;
  border: 1.5px solid var(--card-border);
  background: #fff;
  color: var(--text-dim);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.2s ease;
}
.pill:hover { border-color: var(--accent); color: var(--accent); }
.pill.active {
  background: var(--grad);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 4px 14px rgba(20,184,166,0.35);
}

.form-error {
  background: #fef2f2;
  border: 1px solid #fca5a5;
  color: #b91c1c;
  border-radius: 12px;
  padding: 12px 16px;
  font-size: 13.5px;
}

.form-submit { width: 100%; margin-top: 4px; }
.form-footnote { font-size: 12px; color: var(--text-dimmer); text-align: center; margin: 14px 0 0; }

.form-success { text-align: center; padding: 20px 0; }
.success-icon {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--grad);
  color: #fff;
  font-size: 26px;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px;
  box-shadow: 0 10px 26px rgba(20,184,166,0.35);
}
.form-success p { max-width: 420px; margin: 0 auto; }

/* Footer */
.site-footer { padding: 30px 0; border-top: 1px solid var(--card-border); }
.site-footer p { font-size: 12.5px; color: var(--text-dimmer); margin: 0; text-align: center; }

@media (max-width: 960px) {
  .field-row-4 { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { max-width: 360px; margin: 0 auto; }
  .field-row, .field-row-3, .field-row-4 { grid-template-columns: 1fr; }
  .form-card { padding: 32px 24px; }
  .header-inner { flex-direction: column; gap: 12px; text-align: center; }
}