:root {
  --font-sans: "Inter", sans-serif;
  --font-mono: "Source Code Pro", monospace;
  --color-bg: #ffffff;
  --color-surface: #f6f6f5;
  --color-surface-panel: #ffffff;
  --color-surface-soft: #f0f0ef;
  --color-surface-muted: #ededed;
  --color-border: #e6e6e6;
  --color-divider: #ededed;
  --color-text: #404040;
  --color-text-muted: #666666;
  --color-placeholder: #a5a7ab;
  --color-primary: #64baff;
  --color-success: #6ad210;
  --color-warning: #f2a92a;
  --color-danger: #f01e1e;
  --color-muted: #d9d9d9;
  --shadow-sm: 0 12px 30px rgba(57, 57, 57, 0.05);
  --radius-lg: 30px;
  --radius-md: 18px;
  --radius-sm: 12px;
}

* {
  box-sizing: border-box;
}

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

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

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

.app-shell {
  display: grid;
  grid-template-columns: 250px 1145px;
  gap: 22px;
  min-height: 1021px;
  width: 1427px;
  margin: 22px auto 0;
  padding: 0;
}

.content-area {
  padding: 48px;
  background: var(--color-surface);
  border-radius: 32px;
  min-width: 0;
}

.page-header {
  margin-bottom: 48px;
}

.page-title {
  margin: 0 0 8px;
  font-size: 26px;
  line-height: 1.1;
  font-weight: 600;
  letter-spacing: -1.5px;
}

.page-subtitle {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 22px;
  line-height: 1.25;
  font-weight: 300;
  letter-spacing: 0;
}

@media (max-width: 960px) {
  .app-shell {
    grid-template-columns: 1fr;
    width: auto;
    min-height: auto;
    gap: 0;
  }

  .content-area {
    padding: 20px;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  }
}