:root {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
  font-weight: 400;
  color: #0f172a;
  background-color: #f9fafb;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-text-size-adjust: 100%;

  --color-gradient-start: #4f46e5;
  --color-gradient-end: #6366f1;
  --color-primary: #4f46e5;
  --color-primary-light: #6366f1;
  --color-border: #e5e7eb;
  --color-bg-subtle: #f3f4f6;
  --color-text: #0f172a;
  --color-text-light: #6b7280;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background-color: #f9fafb;
}

.app-root {
  min-height: 100vh;
  max-width: 1120px;
  margin: 0 auto;
  padding: 32px 16px 48px;
}

.muted {
  color: var(--color-text-light);
  font-size: 14px;
}

.error-text {
  margin: 0;
  font-size: 13px;
  color: #b91c1c;
}

.success-text {
  margin: 0 0 12px;
  font-size: 13px;
  color: #059669;
  padding: 8px 12px;
  background-color: #d1fae5;
  border-radius: 6px;
}

/* Auth page */
.auth-root {
  display: flex;
  align-items: center;
  justify-content: center;
}

.auth-card {
  max-width: 420px;
  width: 100%;
  padding: 32px;
  border-radius: 12px;
  border: 1px solid var(--color-border);
  background-color: #ffffff;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

.auth-title {
  margin: 0 0 4px;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.auth-subtitle {
  margin: 0 0 20px;
  color: var(--color-text-light);
  font-size: 14px;
}

.auth-toggle {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.field-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text);
}

.field input {
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  box-sizing: border-box;
  width: 100%;
}

.field input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px rgba(79, 70, 229, 0.15);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s, border-color 0.2s;
  border: 1px solid transparent;
  text-decoration: none;
  box-sizing: border-box;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary-light);
}

.btn-secondary {
  background-color: #fff;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-bg-subtle);
  border-color: var(--color-text-light);
}

/* Dashboard header */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.app-header h1 {
  margin: 0;
  font-size: 24px;
  letter-spacing: -0.03em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-link {
  background: none;
  border: none;
  padding: 0;
  font-size: 14px;
  font-family: inherit;
  color: var(--color-text-light);
  cursor: pointer;
  text-decoration: none;
}

.header-link:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.user-info {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.user-email {
  font-size: 14px;
  color: var(--color-text-light);
}

.app-main {
  padding-top: 24px;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.tab {
  background: transparent;
  border: none;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--color-text-light);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  text-decoration: none;
  font-family: inherit;
}

.tab:hover {
  color: var(--color-text);
}

.tab.active {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

/* Dashboard panels */
.panel {
  padding: 20px;
  border-radius: 12px;
  border: 1px solid var(--color-border);
  background-color: #ffffff;
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.04);
}

.panel h2 {
  margin: 0 0 4px;
  font-size: 18px;
}

.field-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 16px;
}

.plans {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.plan-card {
  padding: 16px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background-color: #f9fafb;
}

.plan-card h3 {
  margin: 0 0 4px;
}

.overview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.overview-card {
  padding: 14px 16px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background-color: #f9fafb;
}

.settings-section {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.settings-section:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.settings-section h3 {
  margin: 0 0 12px;
  font-size: 16px;
  font-weight: 600;
}

.change-form {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-actions {
  display: flex;
  gap: 8px;
}

@media (max-width: 768px) {
  .app-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .field-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .form-actions {
    flex-direction: column;
  }
}