.btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2); border: none; cursor: pointer; font-family: var(--font-body); font-weight: 500; white-space: nowrap; transition: background .15s, border-color .15s, filter .15s; flex-shrink: 0; text-decoration: none; }
.btn:disabled { cursor: not-allowed; opacity: .5; pointer-events: none; }
.btn-primary { background: var(--primary); color: #FFFFFF; border-radius: var(--radius-md); }
.btn-primary:hover:not(:disabled) { filter: brightness(1.08); }
.btn-primary:active:not(:disabled) { filter: brightness(.95); }
.btn-secondary { background: var(--surface-container); color: var(--color-foreground); border-radius: var(--radius-md); }
.btn-secondary:hover:not(:disabled) { filter: brightness(1.08); }
.btn-secondary:active:not(:disabled) { filter: brightness(.96); }
.btn-outline { background: transparent; color: var(--color-foreground); border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.btn-outline:hover:not(:disabled) { background: var(--surface-container); }
.btn-outline:active:not(:disabled) { background: var(--surface-container-high); }
.btn-ghost { background: transparent; color: var(--color-foreground); border-radius: var(--radius-md); }
.btn-ghost:hover:not(:disabled) { background: var(--surface-container); }
.btn-ghost:active:not(:disabled) { background: var(--surface-container-high); }
.btn-sm { height: var(--size-button-sm); padding: 0 var(--space-3); font-size: 13px; min-width: var(--size-button-sm); }
.btn-md { height: var(--size-button-md); padding: 0 var(--space-4); font-size: 14px; min-width: var(--size-button-md); }
.btn-lg { height: var(--size-button-lg); padding: 0 var(--space-5); font-size: 16px; min-width: var(--size-button-lg); }

.card { background: var(--color-surface); border-radius: var(--radius-lg); border: 1px solid var(--color-border); padding: var(--space-5); width: 100%; display: flex; flex-direction: column; gap: var(--space-4); }
.card-header h3 { margin: 0; font-family: var(--font-display); font-size: var(--font-size-body); font-weight: 600; color: var(--color-foreground); }
.card-body { font-family: var(--font-body); font-size: var(--font-size-caption); color: var(--color-muted); line-height: var(--line-height-body); }
.card-footer { display: flex; align-items: center; gap: var(--space-2); padding-top: var(--space-3); border-top: 1px solid var(--color-border); }
.card-footer a { font-family: var(--font-body); font-size: var(--font-size-caption); color: var(--color-link); text-decoration: none; font-weight: 500; }
.card-flat { box-shadow: none; }
.card-raised { box-shadow: var(--shadow-2); }
.card-clickable { cursor: pointer; transition: box-shadow .15s, border-color .15s; }
.card-clickable:hover { filter: brightness(0.97); }

.mx-input { display: flex; flex-direction: column; gap: var(--space-1); width: 240px; flex-shrink: 0; }
.mx-input-label { font-family: var(--font-body); font-size: var(--font-size-caption); font-weight: 500; color: var(--color-foreground); }
.mx-input-field { display: flex; align-items: center; gap: var(--space-2); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); transition: border-color .15s, box-shadow .15s; }
.mx-input-field:focus-within { border-color: var(--color-primary); box-shadow: 0 0 0 3px var(--mxos-indigo-100); }
.mx-input-field input { flex: 1; min-width: 0; border: none; outline: none; background: transparent; font-family: var(--font-body); color: var(--color-foreground); padding: 0 var(--space-3); }
.mx-input-field input::placeholder { color: var(--color-muted); }
.mx-input-field input:disabled { cursor: not-allowed; }
.mx-input-helper { font-family: var(--font-body); font-size: var(--font-size-caption); color: var(--color-muted); min-height: 18px; }
.mx-input-icon { display: flex; align-items: center; padding-left: var(--space-3); flex-shrink: 0; color: var(--color-muted); }
.mx-input-sm .mx-input-field { height: 32px; border-radius: var(--radius-sm); }
.mx-input-sm input { font-size: 13px; }
.mx-input-md .mx-input-field { height: 36px; }
.mx-input-md input { font-size: 14px; }
.mx-input-lg .mx-input-field { height: 44px; }
.mx-input-lg input { font-size: 15px; }
.mx-input-error .mx-input-field { border-color: var(--color-error); }
.mx-input-error .mx-input-field:focus-within { border-color: var(--color-error); box-shadow: 0 0 0 3px var(--mxos-rose-100); }
.mx-input-error .mx-input-helper { color: var(--color-error); }
.mx-input-disabled .mx-input-field { background: var(--color-surface-container-low); opacity: .5; }

.modal-overlay { position: absolute; inset: 0; background: rgba(15,23,42,0.5); display: flex; align-items: center; justify-content: center; }
.modal { background: var(--color-surface); border-radius: var(--radius-xl); box-shadow: var(--shadow-4); display: flex; flex-direction: column; width: 100%; max-height: 80%; overflow: hidden; }
.modal-sm { max-width: 400px; }
.modal-md { max-width: 560px; }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: var(--space-5) var(--space-6) 0 var(--space-6); }
.modal-header h2 { margin: 0; font-family: var(--font-display); font-size: var(--font-size-h4); font-weight: var(--font-weight-h4); color: var(--color-foreground); }
.modal-close { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; border: none; background: transparent; cursor: pointer; border-radius: var(--radius-sm); color: var(--color-muted); flex-shrink: 0; transition: background .15s; }
.modal-close:hover { background: var(--color-surface-container); color: var(--color-foreground); }
.modal-body { padding: var(--space-4) var(--space-6); font-size: var(--font-size-body); line-height: var(--line-height-body); color: var(--color-foreground); }
.modal-footer { display: flex; align-items: center; justify-content: flex-end; gap: var(--space-3); padding: var(--space-4) var(--space-6); border-top: 1px solid var(--color-border); }
.btn { display: inline-flex; align-items: center; gap: 6px; border: none; cursor: pointer; font-family: var(--font-body); font-size: var(--font-size-body); font-weight: 500; border-radius: var(--radius-sm); white-space: nowrap; min-width: 72px; transition: background .15s, border-color .15s; }
.btn-primary { background: var(--color-primary); color: #fff; padding: 8px 20px; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost { background: transparent; color: var(--color-foreground); padding: 8px 20px; }
.btn-ghost:hover { background: var(--color-surface-container); }

.nav-h { display: flex; align-items: center; gap: 2px; background: var(--color-surface-container-low); border-radius: var(--radius-sm); padding: 4px; }
.nav-h-item { display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border-radius: var(--radius-xs); cursor: pointer; color: var(--color-muted); font-size: var(--font-size-caption); white-space: nowrap; transition: background .15s, border-color .15s; height: 32px; min-width: 32px; text-decoration: none; }
.nav-h-item i { width: 16px; height: 16px; display: inline-block; }
.nav-h-item:hover { filter: brightness(1.08); }
.nav-h-item.active { background: var(--color-surface); color: var(--color-foreground); box-shadow: var(--shadow-1); position: relative; }
.nav-h-item.active::after { content: ''; position: absolute; bottom: -2px; left: 12px; right: 12px; height: 2px; background: var(--color-primary); border-radius: 1px; }
.nav-h-item.active:hover { background: var(--color-surface); filter: none; }
.nav-v { display: flex; flex-direction: column; gap: 2px; width: 200px; background: var(--color-surface-container-low); border-radius: var(--radius-sm); padding: 4px; }
.nav-v-item { display: flex; align-items: center; gap: 8px; padding: 8px 12px 8px 16px; border-radius: var(--radius-xs); cursor: pointer; color: var(--color-muted); font-size: var(--font-size-caption); white-space: nowrap; transition: background .15s, border-color .15s; text-decoration: none; }
.nav-v-item i { width: 16px; height: 16px; display: inline-block; }
.nav-v-item:hover { filter: brightness(1.08); }
.nav-v-item.active { background: var(--color-surface); color: var(--color-foreground); box-shadow: var(--shadow-1); position: relative; }
.nav-v-item.active::before { content: ''; position: absolute; left: 0; top: 4px; bottom: 4px; width: 3px; background: var(--color-primary); border-radius: 0 var(--radius-xs) var(--radius-xs) 0; }
.nav-v-item.active:hover { background: var(--color-surface); filter: none; }

.tag { display: inline-flex; align-items: center; gap: 4px; border-radius: var(--radius-full); white-space: nowrap; font-family: var(--font-body); font-size: var(--font-size-caption); line-height: var(--line-height-caption); font-weight: 500; }
.tag-sm { padding: 2px 8px; height: 22px; min-width: 22px; }
.tag-md { padding: 4px 12px; height: 28px; min-width: 28px; }
.tag-primary { background: var(--mxos-indigo-50); color: var(--mxos-indigo-700); }
.tag-success { background: var(--mxos-green-50); color: var(--mxos-green-700); }
.tag-warning { background: var(--mxos-amber-50); color: var(--mxos-amber-700); }
.tag-error { background: var(--mxos-rose-50); color: var(--mxos-rose-700); }
.tag-info { background: var(--mxos-purple-50); color: var(--mxos-purple-700); }
.tag-remove { display: inline-flex; align-items: center; justify-content: center; width: 14px; height: 14px; border: none; background: transparent; color: inherit; cursor: pointer; padding: 0; flex-shrink: 0; border-radius: 50%; transition: background .15s; }
.tag-remove:hover { background: rgba(0,0,0,0.08); }