:root {
  --color-bg: #f5f6f8;
  --color-surface: #ffffff;
  --color-surface-2: #fafbfc;
  --color-text: #16181d;
  --color-text-muted: #5b6270;
  --color-border: #e2e5ea;
  --color-border-strong: #c8ccd3;
  --color-primary: #2f6fed;
  --color-primary-hover: #2557c4;
  --color-primary-soft: #e6efff;
  --color-success: #2c9a4a;
  --color-warning: #d9a23b;
  --color-danger: #d23a3a;
  --color-danger-soft: #fde6e6;

  --radius: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.05);
  --shadow-md: 0 4px 12px rgba(16, 24, 40, 0.08);

  --sidebar-width: 320px;
  --topbar-height: 56px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { margin: 0; font-weight: 600; }
h1 { font-size: 18px; }
h2 { font-size: 16px; }
h3 { font-size: 14px; }
p { margin: 0; }

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

input, select, textarea, button {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

input[type=text],
input[type=password],
input[type=number],
input[type=email],
select,
textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  outline: none;
  transition: border-color 0.15s ease;
}

input[type=text]:focus,
input[type=password]:focus,
input[type=number]:focus,
select:focus,
textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px var(--color-primary-soft);
}

textarea {
  resize: vertical;
  font-family: inherit;
  line-height: 1.55;
}

label .form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin-bottom: 4px;
}

.hidden { display: none !important; }