:root {
  --od-bg: #f4f5f7;
  --od-surface: #ffffff;
  --od-surface-soft: #fafbfc;
  --od-text: #111315;
  --od-muted: #667085;
  --od-border: #e6e8ec;
  --od-primary: #1d1d1f;
  --od-primary-2: #2f3136;
  --od-accent: #3f78ff;
  --od-danger: #c62828;
  --od-success: #0f8b4c;
  --od-radius-sm: 10px;
  --od-radius-md: 14px;
  --od-radius-lg: 20px;
  --od-shadow-sm: 0 6px 16px rgba(16, 24, 40, 0.08);
  --od-shadow-md: 0 16px 36px rgba(16, 24, 40, 0.12);
  --od-space-1: 4px;
  --od-space-2: 8px;
  --od-space-3: 12px;
  --od-space-4: 16px;
  --od-space-5: 20px;
  --od-space-6: 24px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Inter", "SF Pro Text", "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--od-text);
  background: var(--od-bg);
  line-height: 1.5;
}

a {
  color: inherit;
}

/* Brand mark next to "Calendator" for pages that use the shared design system. */
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.logo-mark {
  width: 22px;
  height: 22px;
  border-radius: 7px;
  box-shadow: 0 8px 18px rgba(16, 24, 40, 0.10);
  flex: 0 0 auto;
}

.od-shell-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  background: rgba(255, 255, 255, 0.86);
  border-bottom: 1px solid var(--od-border);
  backdrop-filter: blur(14px);
}

.od-brand {
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.od-btn {
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

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

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

.od-btn-primary {
  background: var(--od-primary);
  color: #fff;
  box-shadow: var(--od-shadow-sm);
}

.od-btn-primary:hover {
  background: #000;
}

.od-btn-secondary {
  background: var(--od-surface);
  border-color: var(--od-border);
  color: var(--od-text);
}

.od-card {
  background: var(--od-surface);
  border: 1px solid var(--od-border);
  border-radius: var(--od-radius-lg);
  box-shadow: var(--od-shadow-sm);
}

.od-input,
.od-select,
.od-textarea {
  width: 100%;
  border: 1px solid var(--od-border);
  border-radius: var(--od-radius-sm);
  padding: 12px;
  font-size: 14px;
  color: var(--od-text);
  background: var(--od-surface-soft);
}

.od-input:focus,
.od-select:focus,
.od-textarea:focus,
.od-btn:focus-visible,
a:focus-visible,
button:focus-visible {
  outline: 0;
  box-shadow: 0 0 0 3px rgba(63, 120, 255, 0.25);
  border-color: #b8cdfd;
}

.od-label {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  color: var(--od-muted);
  font-weight: 700;
}

.od-footer {
  text-align: center;
  color: var(--od-muted);
  font-size: 13px;
  padding: 24px 16px 36px;
}

.od-page {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

@media (max-width: 768px) {
  .od-shell-header {
    padding: 12px 14px;
  }
}