:root {
  --color-primary: #1e4b2b;
  --color-primary-foreground: #ffffff;
  --color-secondary: #f59e0b;
  --color-secondary-foreground: #0f172a;
  --color-surface: #ffffff;
  --color-surface-muted: #f1f5f9;
  --color-surface-dark: #0f172a;
  --color-border: rgba(15, 23, 42, 0.08);
  --color-text: #0f172a;
  --color-text-muted: #475569;
  --font-sans: 'Inter', 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --shadow-soft: 0 20px 40px rgba(15, 23, 42, 0.08);
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition-normal: 200ms ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: linear-gradient(160deg, rgba(30, 75, 43, 0.04), rgba(15, 23, 42, 0.02));
  color: var(--color-text);
  min-height: 100vh;
  line-height: 1.6;
}

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

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  display: block;
}

main {
  width: min(960px, 92%);
  margin: 0 auto;
  padding: 6rem 0 4rem;
}

.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: clamp(2rem, 3vw, 3rem);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(148, 163, 184, 0.12);
}

form label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--color-text);
}

input,
button,
textarea,
select {
  font: inherit;
}

input[type="text"],
input[type="email"],
input[type="password"],
textarea,
select {
  width: 100%;
  padding: 0.875rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(148, 163, 184, 0.32);
  background-color: rgba(255, 255, 255, 0.9);
  transition: border var(--transition-normal), box-shadow var(--transition-normal), transform 150ms ease;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: rgba(30, 75, 43, 0.6);
  box-shadow: 0 8px 20px rgba(30, 75, 43, 0.12);
  transform: translateY(-1px);
}

.helper-text {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

.error-message {
  color: #dc2626;
  background: rgba(220, 38, 38, 0.1);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  margin-top: 0.75rem;
  border: 1px solid rgba(220, 38, 38, 0.2);
}

.success-message {
  color: #166534;
  background: rgba(22, 101, 52, 0.1);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  margin-top: 0.75rem;
  border: 1px solid rgba(22, 101, 52, 0.2);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border-radius: 999px;
  padding: 0.85rem 1.75rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(135deg, #1e4b2b, #25603a);
  color: var(--color-primary-foreground);
  box-shadow: 0 12px 24px rgba(30, 75, 43, 0.22);
}

.btn-primary:hover {
  box-shadow: 0 16px 32px rgba(30, 75, 43, 0.24);
}

.btn-secondary {
  background: rgba(30, 75, 43, 0.08);
  color: var(--color-primary);
}

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
}

.divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 1.5rem 0;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: rgba(148, 163, 184, 0.4);
}

.auth-link {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
}

.auth-link:hover {
  text-decoration: underline;
}

@media (max-width: 640px) {
  main {
    padding: 5rem 0 2rem;
  }

  .card {
    padding: 1.75rem;
  }
}