:root {
  --color-primary: #1a56db;
  --color-accent: #0e9f6e;
  --color-surface: #ffffff;
  --color-surface-sunken: #f6f7fb;
  --color-border: #e3e6ee;
  --color-text: #171a23;
  --color-text-muted: #6b7280;
  --color-danger: #d64545;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-card: 0 1px 2px rgba(16, 24, 40, 0.04), 0 8px 24px -6px rgba(16, 24, 40, 0.10);
  --font-sans: -apple-system, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-surface: #15171f;
    --color-surface-sunken: #0d0e13;
    --color-border: #262a38;
    --color-text: #edeef2;
    --color-text-muted: #9297a6;
    --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px -6px rgba(0, 0, 0, 0.5);
  }
}

:root[data-theme="dark"] {
  --color-surface: #15171f;
  --color-surface-sunken: #0d0e13;
  --color-border: #262a38;
  --color-text: #edeef2;
  --color-text-muted: #9297a6;
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px -6px rgba(0, 0, 0, 0.5);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-surface-sunken);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-primary);
}

button {
  font-family: inherit;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: var(--radius-md);
  padding: 11px 18px;
  font-size: 14.5px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.08s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.08);
}

.btn-primary:hover {
  opacity: 0.92;
}

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

.btn-primary:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-muted);
}

.field input {
  font-family: inherit;
  font-size: 15px;
  padding: 11px 13px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.field input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 18%, transparent);
}

.alert {
  border-radius: var(--radius-md);
  padding: 11px 14px;
  font-size: 13.5px;
  margin-bottom: 16px;
  display: none;
}

.alert.is-visible {
  display: block;
}

.alert-error {
  background: color-mix(in srgb, var(--color-danger) 12%, transparent);
  color: var(--color-danger);
  border: 1px solid color-mix(in srgb, var(--color-danger) 30%, transparent);
}

.alert-success {
  background: color-mix(in srgb, var(--color-accent) 12%, transparent);
  color: var(--color-accent);
  border: 1px solid color-mix(in srgb, var(--color-accent) 30%, transparent);
}