/* ===========================
   Design System & Variables
   =========================== */
:root {
    /* Colors */
    --primary: #2563EB;
    --primary-dark: #1D4ED8;
    --primary-light: #3B82F6;
    --accent: #3B82F6;
    --surface: #F8FAFC;
    --surface-elevated: #FFFFFF;
    --muted: #94A3B8;
    --muted-light: #CBD5E1;
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --border: #E2E8F0;
    --success: #10B981;
    --danger: #EF4444;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-pill: 999px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
}

/* ===========================
   Base Styles
   =========================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--surface);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    line-height: 1.2;
}

h1 {
    font-size: var(--font-size-2xl);
}

h2 {
    font-size: var(--font-size-xl);
}

h3 {
    font-size: var(--font-size-lg);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    outline: none;
    transition: all var(--transition-base);
}

input,
select,
textarea {
    font-family: inherit;
    font-size: var(--font-size-base);
}

/* ===========================
   Layout
   =========================== */
.screen {
    min-height: 100vh;
    width: 100%;
}

.view {
    display: none;
    padding: var(--spacing-lg);
    padding-bottom: 100px;
    /* Space for bottom nav */
    max-width: 800px;
    margin: 0 auto;
}

.view.active {
    display: block;
}

.view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.view-header h2 {
    color: var(--text-primary);
}

/* ===========================
   Buttons
   =========================== */
.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 14px 24px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--font-size-base);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
    width: 100%;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, #1E40AF 100%);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
    transform: translateY(-2px);
}

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

.btn-secondary {
    background: var(--surface-elevated);
    color: var(--text-primary);
    padding: 14px 24px;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: var(--font-size-base);
    border: 2px solid var(--border);
    width: 100%;
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(37, 99, 235, 0.05);
}

.btn-icon {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-pill);
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn-icon:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    transform: scale(1.05);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
}

/* ===========================
   Cards
   =========================== */
.stat-card {
    background: var(--surface-elevated);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    text-align: center;
    flex: 1;
}

.stat-value {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-card-large {
    background: var(--surface-elevated);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.stat-value-large {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary);
    margin-top: var(--spacing-sm);
}

/* ===========================
   Toggle Group
   =========================== */
.toggle-group {
    display: flex;
    background: var(--surface-elevated);
    border-radius: var(--radius-pill);
    padding: 4px;
    box-shadow: var(--shadow-sm);
}

.toggle-btn {
    padding: 8px 16px;
    border-radius: var(--radius-pill);
    font-size: var(--font-size-sm);
    font-weight: 600;
    background: transparent;
    color: var(--text-secondary);
}

.toggle-btn.active {
    background: var(--primary);
    color: white;
}

/* ===========================
   Chart
   =========================== */
.chart-container {
    background: var(--surface-elevated);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-lg);
    position: relative;
    height: 400px;
}

.chart-container canvas {
    max-height: 100%;
}

.quick-stats {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

/* ===========================
   Tasks List
   =========================== */
.tasks-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.task-group {
    margin-bottom: var(--spacing-lg);
}

.task-group-header {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-sm);
}

.task-item {
    background: var(--surface-elevated);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: all var(--transition-base);
}

.task-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.task-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-pill);
    object-fit: cover;
    border: 2px solid var(--border);
}

.task-info {
    flex: 1;
}

.task-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.task-meta {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.task-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.task-action-btn {
    background: transparent;
    color: var(--muted);
    padding: 8px;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
}

.task-action-btn:hover {
    background: var(--surface);
    color: var(--primary);
}

.task-action-btn.delete:hover {
    color: var(--danger);
}

/* ===========================
   Stats & Breakdown
   =========================== */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.breakdown-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.breakdown-item {
    background: var(--surface-elevated);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.breakdown-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-pill);
    object-fit: cover;
    border: 3px solid var(--primary);
}

.breakdown-info {
    flex: 1;
}

.breakdown-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.breakdown-count {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary);
}

.breakdown-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* ===========================
   Settings
   =========================== */
.settings-section {
    margin-bottom: var(--spacing-xl);
}

.settings-section h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.settings-members-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.settings-member-item {
    background: var(--surface-elevated);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.settings-member-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-pill);
    object-fit: cover;
    border: 2px solid var(--border);
}

.settings-member-name {
    flex: 1;
    font-weight: 600;
    color: var(--text-primary);
}

.settings-member-delete {
    background: transparent;
    color: var(--danger);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
}

.settings-member-delete:hover {
    background: rgba(239, 68, 68, 0.1);
}

.sync-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.sync-status {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface-elevated);
}

.sync-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-top: 6px;
    flex-shrink: 0;
}

.sync-indicator.unconfigured,
.sync-indicator.idle {
    background: var(--muted);
}

.sync-indicator.syncing {
    background: var(--primary);
    animation: pulse 1s infinite;
}

.sync-indicator.success {
    background: var(--success);
}

.sync-indicator.error {
    background: var(--danger);
}

.sync-status-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.sync-last-synced {
    font-size: var(--font-size-xs);
    color: var(--muted);
}

/* ===========================
   Bottom Navigation
   =========================== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-around;
    padding: 8px 0;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
    z-index: 100;
}

.nav-btn {
    background: transparent;
    color: var(--muted);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    flex: 1;
    max-width: 100px;
}

.nav-btn svg {
    width: 24px;
    height: 24px;
}

.nav-btn span {
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.nav-btn.active {
    color: var(--primary);
}

.nav-btn:hover {
    background: var(--surface);
}

/* ===========================
   Modals
   =========================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    backdrop-filter: blur(4px);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--surface-elevated);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    color: var(--text-primary);
}

.modal-close {
    background: transparent;
    color: var(--muted);
    font-size: 28px;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
}

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

.modal-body {
    padding: var(--spacing-lg);
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border);
    display: flex;
    gap: var(--spacing-md);
}

.modal-footer button {
    flex: 1;
}

/* ===========================
   Forms
   =========================== */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--surface-elevated);
    transition: all var(--transition-base);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.photo-upload {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.photo-preview {
    width: 100px;
    height: 100px;
    border-radius: var(--radius-pill);
    background: var(--surface);
    border: 2px dashed var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.photo-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.photo-preview.empty::after {
    content: '📷';
    font-size: 32px;
}

/* ===========================
   Setup Screen
   =========================== */
.setup-container {
    max-width: 500px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.setup-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.setup-header h1 {
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.setup-header p {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
}

.member-setup-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.member-setup-item {
    background: var(--surface-elevated);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.member-setup-avatar {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-pill);
    object-fit: cover;
    border: 3px solid var(--primary);
}

.member-setup-name {
    flex: 1;
    font-weight: 600;
    font-size: var(--font-size-lg);
    color: var(--text-primary);
}

/* ===========================
   Floating Action Button
   =========================== */
.fab {
    position: fixed;
    bottom: 80px;
    right: var(--spacing-lg);
    width: 56px;
    height: 56px;
    border-radius: var(--radius-pill);
    background: var(--primary);
    color: white;
    font-size: 28px;
    box-shadow: var(--shadow-lg);
    z-index: 99;
    display: none;
}

.fab:hover {
    background: var(--primary-dark);
    transform: scale(1.1);
}

.fab:active {
    transform: scale(1.05);
}

#chartView.active~.fab,
#tasksView.active~.fab {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ===========================
   Responsive
   =========================== */
@media (max-width: 640px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .quick-stats {
        flex-direction: column;
    }

    .chart-container {
        height: 300px;
        padding: var(--spacing-md);
    }
}

/* ===========================
   Animations
   =========================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }

    100% {
        background-position: 1000px 0;
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.6;
    }
}

/* Apply animations to elements */
.view {
    animation: fadeIn 0.4s ease;
}

.stat-card,
.stat-card-large {
    animation: slideUp 0.5s ease;
    transition: all var(--transition-base);
}

.stat-card:hover,
.stat-card-large:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.task-item,
.breakdown-item,
.settings-member-item {
    animation: slideUp 0.4s ease;
    animation-fill-mode: both;
}

/* Staggered animation for lists */
.task-item:nth-child(1) {
    animation-delay: 0.05s;
}

.task-item:nth-child(2) {
    animation-delay: 0.1s;
}

.task-item:nth-child(3) {
    animation-delay: 0.15s;
}

.task-item:nth-child(4) {
    animation-delay: 0.2s;
}

.task-item:nth-child(5) {
    animation-delay: 0.25s;
}

.breakdown-item:nth-child(1) {
    animation-delay: 0.05s;
}

.breakdown-item:nth-child(2) {
    animation-delay: 0.1s;
}

.breakdown-item:nth-child(3) {
    animation-delay: 0.15s;
}

.breakdown-item:nth-child(4) {
    animation-delay: 0.2s;
}

.quick-stats .stat-card:nth-child(1) {
    animation-delay: 0.1s;
}

.quick-stats .stat-card:nth-child(2) {
    animation-delay: 0.2s;
}

.quick-stats .stat-card:nth-child(3) {
    animation-delay: 0.3s;
}

/* Button ripple effect */
.btn-primary,
.btn-secondary,
.btn-icon {
    position: relative;
    overflow: hidden;
}

.btn-primary::before,
.btn-secondary::before,
.btn-icon::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-primary:active::before,
.btn-secondary:active::before,
.btn-icon:active::before {
    width: 300px;
    height: 300px;
}

/* Chart container animation */
.chart-container {
    animation: scaleIn 0.6s ease;
}

/* Modal animations enhanced */
@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Loading skeleton */
.skeleton {
    background: linear-gradient(90deg,
            var(--surface) 0%,
            var(--border) 50%,
            var(--surface) 100%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-md);
}

/* Smooth transitions for interactive elements */
.task-action-btn,
.settings-member-delete,
.nav-btn {
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.task-action-btn:active,
.settings-member-delete:active {
    transform: scale(0.95);
}

/* Avatar animations */
.task-avatar,
.breakdown-avatar,
.settings-member-avatar,
.member-setup-avatar {
    transition: all var(--transition-base);
}

.task-avatar:hover,
.breakdown-avatar:hover,
.settings-member-avatar:hover {
    transform: scale(1.1);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

/* Toggle animation */
.toggle-btn {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.toggle-btn:not(.active):hover {
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
}

/* FAB animation */
.fab {
    animation: scaleIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.fab:active {
    transform: scale(0.9);
}

/* Bottom nav animation */
.bottom-nav {
    animation: slideUp 0.5s ease;
}

.nav-btn {
    position: relative;
}

.nav-btn::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: var(--primary);
    border-radius: 3px 3px 0 0;
    transform: translateX(-50%);
    transition: width 0.3s ease;
}

.nav-btn.active::after {
    width: 60%;
}

/* Form focus animations */
.form-control {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.form-control:focus {
    transform: translateY(-2px);
}

/* Photo upload animation */
.photo-preview {
    transition: all var(--transition-base);
}

.photo-preview:hover {
    transform: scale(1.05);
    border-color: var(--primary);
}

/* Setup screen animation */
.setup-container {
    animation: fadeIn 0.6s ease;
}

.member-setup-item {
    animation: slideUp 0.4s ease;
    animation-fill-mode: both;
}

.member-setup-item:nth-child(1) {
    animation-delay: 0.1s;
}

.member-setup-item:nth-child(2) {
    animation-delay: 0.2s;
}

.member-setup-item:nth-child(3) {
    animation-delay: 0.3s;
}

.member-setup-item:nth-child(4) {
    animation-delay: 0.4s;
}

/* Stat value animation on update */
.stat-value,
.stat-value-large,
.breakdown-count {
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Hover lift effect for cards */
.task-item,
.breakdown-item,
.settings-member-item,
.member-setup-item {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.task-item:active {
    transform: scale(0.98);
}

/* ===========================
   Liquid Glass Tabs
   =========================== */
.liquid-tabs {
    position: relative;
    display: flex;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-pill);
    padding: 6px;
    margin-bottom: var(--spacing-lg);
    box-shadow:
        0 8px 32px rgba(37, 99, 235, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.8),
        inset 0 -1px 0 rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.5);
    overflow: hidden;
}

.liquid-tabs-slider {
    position: absolute;
    top: 6px;
    left: 6px;
    height: calc(100% - 12px);
    width: calc(50% - 6px);
    background: linear-gradient(135deg,
            rgba(37, 99, 235, 0.95) 0%,
            rgba(59, 130, 246, 0.95) 100%);
    border-radius: var(--radius-pill);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow:
        0 4px 16px rgba(37, 99, 235, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
    z-index: 0;
}

.liquid-tab {
    flex: 1;
    background: transparent;
    border: none;
    padding: 12px 20px;
    border-radius: var(--radius-pill);
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
    cursor: pointer;
}

.liquid-tab .tab-icon {
    font-size: 18px;
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.liquid-tab.active {
    color: white;
}

.liquid-tab.active .tab-icon {
    transform: scale(1.1);
}

.liquid-tab:not(.active):hover {
    color: var(--primary);
}

.liquid-tab:not(.active):hover .tab-icon {
    transform: scale(1.05);
}

/* Move slider when second tab is active */
.liquid-tab:nth-child(3).active~.liquid-tabs-slider,
.liquid-tab[data-tab="quickAdd"].active~.liquid-tabs-slider {
    left: calc(50% + 0px);
}

/* Tab Content */
.tab-content {
    display: none;
    animation: fadeIn 0.4s ease;
}

.tab-content.active {
    display: block;
}

/* ===========================
   Quick Add Styles
   =========================== */
.quick-add-container {
    max-width: 600px;
    margin: 0 auto;
}

.quick-add-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.quick-add-header h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.quick-add-header p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.date-range-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.member-checkboxes {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--surface);
    border-radius: var(--radius-md);
    border: 2px solid var(--border);
}

.member-checkbox-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--surface-elevated);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.member-checkbox-item:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.member-checkbox-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary);
}

.member-checkbox-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-pill);
    object-fit: cover;
    border: 2px solid var(--border);
}

.member-checkbox-item:has(input:checked) {
    background: rgba(37, 99, 235, 0.1);
    border-color: var(--primary);
}

.member-checkbox-item:has(input:checked) .member-checkbox-avatar {
    border-color: var(--primary);
}

.quick-add-preview {
    background: var(--surface-elevated);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin: var(--spacing-lg) 0;
    border: 2px solid var(--border);
}

.preview-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-sm);
}

.preview-content {
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    line-height: 1.6;
}

.preview-stats {
    display: flex;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border);
}

.preview-stat {
    flex: 1;
    text-align: center;
}

.preview-stat-value {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary);
}

.preview-stat-label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ===========================
   Utilities
   =========================== */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
    animation: fadeIn 0.6s ease;
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
    animation: pulse 2s infinite;
}

.empty-state-text {
    font-size: var(--font-size-lg);
    font-weight: 500;
}