:root {
  --emerald: #059669;
  --emerald-dark: #047857;
  --emerald-light: #d1fae5;
  --ink: #0f172a;
  --muted: #64748b;
  --bg: #f8faf9;
  --card-bg: #ffffff;
  --border: #e5e7eb;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--ink);
  position: relative;
  overflow-x: hidden;
  padding: 24px;
}

.bg-decoration {
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(600px circle at 15% 15%, var(--emerald-light) 0%, transparent 60%),
    radial-gradient(500px circle at 90% 85%, var(--emerald-light) 0%, transparent 55%);
  opacity: 0.7;
  pointer-events: none;
}

.card {
  position: relative;
  z-index: 1;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 48px 40px;
  max-width: 460px;
  width: 100%;
  box-shadow: 0 20px 50px -20px rgba(5, 150, 105, 0.25);
  text-align: center;
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 28px;
}

.logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--emerald), var(--emerald-dark));
  color: white;
  font-weight: 700;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0.5px;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
}

h1 {
  font-size: 24px;
  margin: 0 0 12px;
  color: var(--ink);
}

.subtitle {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.6;
  margin: 0 0 32px;
}

.subtitle strong {
  color: var(--ink);
}

.box-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 15px 20px;
  background: var(--emerald);
  color: white;
  text-decoration: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  transition: background 0.15s ease, transform 0.15s ease;
}

.box-button:hover {
  background: var(--emerald-dark);
  transform: translateY(-1px);
}

.box-button:active {
  transform: translateY(0);
}

.box-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.hint {
  margin: 20px 0 0;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
}

.divider {
  height: 1px;
  background: var(--border);
  margin: 28px 0 20px;
}

.footnote {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}

.footnote a {
  color: var(--emerald);
  text-decoration: none;
  font-weight: 600;
}

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

footer {
  position: fixed;
  bottom: 16px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 12px;
  color: var(--muted);
  z-index: 1;
}