/* Doctor Twin - Navigation Components */

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-4);
    z-index: var(--z-sticky);
}

.header__left {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.header__back {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    color: var(--color-text-primary);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.header__back:hover {
    background: var(--color-surface-hover);
}

.header__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}

.header__greeting {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    color: var(--color-text-secondary);
}

.header__greeting strong {
    color: var(--color-text-primary);
    font-weight: var(--font-weight-semibold);
}

.header__right {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.header__action {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    color: var(--color-text-secondary);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.header__action:hover {
    background: var(--color-surface-hover);
    color: var(--color-text-primary);
}

.header__action-badge {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 8px;
    height: 8px;
    background: var(--color-danger);
    border-radius: var(--radius-full);
    border: 2px solid var(--color-surface);
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--color-surface);
    border-top: 1px solid var(--color-border-light);
    display: flex;
    align-items: stretch;
    padding-bottom: var(--safe-area-bottom);
    z-index: var(--z-fixed);
}

.bottom-nav__item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-1);
    text-decoration: none;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
    position: relative;
    background: transparent;
    border: none;
    cursor: pointer;
}

.bottom-nav__item:hover {
    color: var(--color-text-secondary);
}

.bottom-nav__item--active {
    color: var(--color-primary);
}

.bottom-nav__icon {
    font-size: 24px;
    line-height: 1;
    position: relative;
}

.bottom-nav__badge {
    position: absolute;
    top: -4px;
    right: -8px;
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    font-size: 10px;
    font-weight: var(--font-weight-bold);
    background: var(--color-danger);
    color: var(--color-text-inverse);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.bottom-nav__label {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
}

/* Active indicator line */
.bottom-nav__item--active::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 32px;
    height: 3px;
    background: var(--color-primary);
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}

/* Tabs */
.tabs {
    display: flex;
    background: var(--color-background);
    border-radius: var(--radius-lg);
    padding: var(--spacing-1);
    gap: var(--spacing-1);
}

.tabs__item {
    flex: 1;
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
    white-space: nowrap;
}

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

.tabs__item--active {
    background: var(--color-surface);
    color: var(--color-text-primary);
    box-shadow: var(--shadow-sm);
}

/* Page Tabs (Horizontal Scrolling) */
.page-tabs {
    display: flex;
    gap: var(--spacing-3);
    overflow-x: auto;
    padding: var(--spacing-2) var(--spacing-4);
    margin: 0 calc(var(--spacing-4) * -1);
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.page-tabs::-webkit-scrollbar {
    display: none;
}

.page-tabs__item {
    flex-shrink: 0;
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.page-tabs__item:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.page-tabs__item--active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-text-inverse);
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-sm);
}

.breadcrumb__item {
    color: var(--color-text-muted);
    text-decoration: none;
}

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

.breadcrumb__item--active {
    color: var(--color-text-primary);
    font-weight: var(--font-weight-medium);
}

.breadcrumb__separator {
    color: var(--color-text-muted);
}

/* Floating Action Button */
.fab {
    position: fixed;
    bottom: calc(var(--nav-height) + var(--spacing-4) + var(--safe-area-bottom));
    right: var(--spacing-4);
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    background: var(--color-primary);
    color: var(--color-text-inverse);
    border: none;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    z-index: var(--z-dropdown);
}

.fab:hover {
    background: var(--color-primary-dark);
    transform: scale(1.05);
}

.fab:active {
    transform: scale(0.95);
}

.fab__icon {
    font-size: 24px;
}

/* Quick Actions Bar */
.quick-actions {
    display: flex;
    gap: var(--spacing-3);
    padding: var(--spacing-4);
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    margin: var(--spacing-4);
}

.quick-actions__item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3);
    background: var(--color-background);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.quick-actions__item:hover {
    background: var(--color-primary-light);
}

.quick-actions__icon {
    font-size: 24px;
    color: var(--color-primary);
}

.quick-actions__label {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
}

/* Driving Mode Navigation */
.driving-mode .header {
    background: var(--dm-surface);
    border-bottom-color: transparent;
}

.driving-mode .header__title,
.driving-mode .header__greeting strong {
    color: var(--dm-text);
}

.driving-mode .header__greeting {
    color: var(--dm-text-secondary);
}

.driving-mode .header__action,
.driving-mode .header__back {
    color: var(--dm-text);
}

.driving-mode .bottom-nav {
    background: var(--dm-surface);
    border-top-color: transparent;
}

.driving-mode .bottom-nav__item {
    color: var(--dm-text-secondary);
}

.driving-mode .bottom-nav__item--active {
    color: var(--color-primary);
}

/* Sticky Section Header */
.sticky-header {
    position: sticky;
    top: var(--header-height);
    background: var(--color-background);
    padding: var(--spacing-3) var(--spacing-4);
    margin: 0 calc(var(--spacing-4) * -1);
    z-index: var(--z-sticky);
    border-bottom: 1px solid var(--color-border-light);
}

.sticky-header__title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}