:root {
  --green:       #152238;
  --teal:        #7BA8A1;
  --teal-mid:    rgba(123,168,161,0.25);
  --text:        #334155;
  --soft:        #64748b;
  --warm-border: rgba(21,34,56,0.15);
  --card-bg:     linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(224,233,243,0.98) 100%);
  --shadow:      rgba(0,0,0,0.1) 0 10px 15px -3px, rgba(0,0,0,0.05) 0 4px 6px -2px;
  --shadow-lg:   0 12px 36px rgba(45,196,176,0.18);
  --sans:        system-ui, 'Segoe UI', Roboto, sans-serif;
}

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

html {
  overflow-y: scroll;
}

body {
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.5;
  letter-spacing: 0.18px;
  color: var(--text);
  background: radial-gradient(circle at top, #dce8f5 0%, #f0f4f8 48%, #eaeff5 100%);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--green);
  font-weight: 500;
  font-size: 1.1rem;
}

.nav-logo img {
  width: 60px;
  height: auto;
  border-radius: 8px;
  object-fit: contain;
  background: transparent;
  padding: 4px;
  box-shadow: 0 2px 8px rgba(21,34,56,0.12);
}

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

.nav-login {
  color: var(--green);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  border: 1.5px solid var(--teal-mid);
  padding: 0.45rem 1.1rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.6);
  transition: background 0.2s, box-shadow 0.2s;
}

.nav-login:hover {
  background: rgba(255,255,255,0.9);
  box-shadow: 0 2px 10px var(--teal-mid);
}

.nav-help {
  color: var(--soft);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  transition: color 0.2s;
}

.nav-help:hover {
  color: var(--green);
}

footer {
  text-align: center;
  padding: 0 1.5rem 3rem;
  color: var(--soft);
  font-size: 0.875rem;
}

footer a { color: var(--green); text-decoration: none; }
footer a:hover { text-decoration: underline; }