/* Modern Liquid Glass Design - SplitTab */

/* CSS Variables for consistent theming */
:root {
    --primary-color: #667eea;
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-color: #f093fb;
    --accent-color: #4facfe;
    --success-color: #43e97b;
    --warning-color: #fa709a;
    --error-color: #ff6b6b;
    
    --bg-primary: #0f0f23;
    --bg-secondary: rgba(255, 255, 255, 0.05);
    --bg-glass: rgba(255, 255, 255, 0.1);
    --bg-card: rgba(255, 255, 255, 0.08);
    --bg-modal: rgba(15, 15, 35, 0.95);
    
    --text-primary: #ffffff;
    --text-secondary: #b8c5d6;
    --text-muted: #8b9bb4;
    --text-dark: #1a1a2e;
    
    --border-color: rgba(255, 255, 255, 0.1);
    --border-hover: rgba(255, 255, 255, 0.2);
    
    --shadow-light: 0 4px 20px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-heavy: 0 16px 64px rgba(0, 0, 0, 0.3);
    
    --glass-blur: blur(20px);
    --border-radius: 16px;
    --border-radius-small: 8px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(120, 219, 255, 0.2) 0%, transparent 50%);
    z-index: -1;
    animation: backgroundShift 20s ease-in-out infinite;
}

@keyframes backgroundShift {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(-10px, -10px) scale(1.1); }
    50% { transform: translate(10px, -5px) scale(0.9); }
    75% { transform: translate(-5px, 10px) scale(1.05); }
}

/* App Container */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    background: var(--bg-glass);
    backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    gap: 2rem;
}

.logo {
    font-size: 1.75rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.logo i {
    font-size: 2rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* User Selector */
.user-selector {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--bg-card);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-small);
    border: 1px solid var(--border-color);
    backdrop-filter: var(--glass-blur);
}

.user-selector label {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.9rem;
    white-space: nowrap;
}

.user-select {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.9rem;
    min-width: 120px;
    outline: none;
    cursor: pointer;
}

.user-select option {
    background: var(--bg-primary);
    color: var(--text-primary);
}

/* Navigation */
.nav {
    display: flex;
    gap: 0.5rem;
}

.nav-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.75rem 1.25rem;
    border-radius: var(--border-radius-small);
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: var(--glass-blur);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    font-size: 0.9rem;
}

.nav-btn:hover {
    background: var(--bg-glass);
    border-color: var(--border-hover);
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.nav-btn.active {
    background: var(--primary-gradient);
    border-color: transparent;
    color: white;
    box-shadow: var(--shadow-medium);
}

.nav-btn i {
    font-size: 1rem;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 2rem 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* Views */
.view {
    display: none;
    animation: fadeIn 0.3s ease-out;
}

.view.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* View Headers */
.view-header {
    margin-bottom: 2rem;
}

.view-header h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.view-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.view-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

/* Dashboard */
.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.dashboard-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.dashboard-sections {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    backdrop-filter: var(--glass-blur);
    transition: all 0.3s ease;
    overflow: hidden;
}

.card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-heavy);
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-content {
    padding: 1.5rem;
}

/* Summary Cards */
.summary-card .card-content {
    text-align: center;
    padding: 2rem 1.5rem;
}

.balance-display {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--success-color);
    margin-bottom: 0.5rem;
    text-shadow: 0 0 20px rgba(67, 233, 123, 0.3);
}

.balance-status {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.1);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius-small);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    backdrop-filter: var(--glass-blur);
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-light);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn-secondary {
    background: var(--bg-glass);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-card);
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.btn-text {
    background: transparent;
    color: var(--primary-color);
    padding: 0.5rem 1rem;
}

.btn-text:hover {
    background: var(--bg-glass);
    color: var(--text-primary);
}

.btn-icon {
    padding: 0.5rem;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: all 0.3s ease;
    backdrop-filter: var(--glass-blur);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-help {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-muted);
    font-style: italic;
}

/* Amount Input */
.amount-input {
    position: relative;
    display: flex;
    align-items: center;
}

.currency-symbol {
    position: absolute;
    left: 1rem;
    color: var(--text-muted);
    font-weight: 500;
}

.amount-input input {
    padding-left: 2rem;
}

/* Members Input */
.members-input {
    margin-bottom: 1rem;
}

.member-input-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.member-input-row input {
    flex: 1;
}

.members-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.member-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    transition: all 0.3s ease;
}

.member-item:hover {
    background: var(--bg-card);
    border-color: var(--border-hover);
}

.member-item span {
    font-weight: 500;
    color: var(--text-primary);
}

/* Split Options */
.split-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    cursor: pointer;
    transition: all 0.3s ease;
}

.checkbox-label:hover {
    background: var(--bg-card);
    border-color: var(--border-hover);
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin: 0;
}

/* Split Toggle Buttons */
.split-toggle-buttons {
    display: flex;
    gap: 0;
    margin-top: 0.5rem;
    border-radius: var(--border-radius-small);
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.split-toggle-btn {
    flex: 1;
    padding: 0.875rem 1.25rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    position: relative;
}

.split-toggle-btn:not(:last-child) {
    border-right: 1px solid var(--border-color);
}

.split-toggle-btn:hover:not(.active) {
    background: var(--bg-glass);
    color: var(--text-primary);
}

.split-toggle-btn.active {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-light);
}

.split-toggle-btn i {
    font-size: 0.9rem;
}

/* Custom Split */
.custom-split-input {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    margin-bottom: 0.5rem;
}

.custom-split-input label {
    font-weight: 500;
    color: var(--text-primary);
    margin: 0;
}

.custom-split-input input {
    width: 120px;
    text-align: right;
}

/* Empty States */
.empty-state {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
    color: var(--text-muted);
}

.empty-state p {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.empty-state .text-muted {
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    color: var(--text-muted);
    font-style: italic;
}

/* Groups Grid */
.groups-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.group-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: var(--glass-blur);
}

.group-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-heavy);
}

.group-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.group-card p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.group-stats {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

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

.group-stat .stat-number {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.group-stat .stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.group-actions {
    display: flex;
    gap: 0.5rem;
}

/* Expenses List */
.expenses-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.expense-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    transition: all 0.3s ease;
    backdrop-filter: var(--glass-blur);
}

.expense-item:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.expense-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.expense-description {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.expense-amount {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 1.25rem;
}

.expense-details {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Personal Balance Items */
.personal-balance-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    transition: all 0.3s ease;
    cursor: pointer;
    backdrop-filter: var(--glass-blur);
}

.personal-balance-item:hover {
    background: var(--bg-glass);
    border-color: var(--border-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.personal-balance-info {
    flex: 1;
}

.personal-balance-group {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    font-size: 1.1rem;
}

.personal-balance-details {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.personal-balance-amount {
    font-weight: 600;
    font-size: 1.1rem;
}

.personal-balance-amount.positive {
    color: var(--success-color);
    text-shadow: 0 0 10px rgba(67, 233, 123, 0.3);
}

.personal-balance-amount.negative {
    color: var(--error-color);
    text-shadow: 0 0 10px rgba(255, 107, 107, 0.3);
}

.personal-balance-amount.neutral {
    color: var(--text-secondary);
}

/* Modals */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-modal);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    backdrop-filter: var(--glass-blur);
    box-shadow: var(--shadow-heavy);
    transform: scale(0.9);
    transition: all 0.3s ease;
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-content.large {
    max-width: 800px;
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.3s ease;
}

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

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

/* Balance Summary */
.balance-summary {
    margin-bottom: 2rem;
}

.balance-overview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.balance-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.5rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    text-align: center;
    backdrop-filter: var(--glass-blur);
}

.balance-stat .stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.balance-stat .stat-value {
    font-size: 1.5rem;
    font-weight: 600;
}

.balance-stat .stat-value.positive {
    color: var(--success-color);
}

.balance-stat .stat-value.negative {
    color: var(--error-color);
}

/* Expense Breakdown */
.expense-breakdown h4 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.expense-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.expense-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 1.25rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

.expense-item:hover {
    background: var(--bg-card);
    border-color: var(--border-hover);
}

.expense-info {
    flex: 1;
}

.expense-description {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.expense-details {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.expense-user-amounts {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-items: flex-end;
}

.amount-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.amount-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.amount-value {
    font-weight: 600;
    color: var(--text-primary);
}

.amount-value.positive {
    color: var(--success-color);
}

.amount-value.negative {
    color: var(--error-color);
}

/* Notifications */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-heavy);
    z-index: 10000;
    max-width: 400px;
    backdrop-filter: var(--glass-blur);
    animation: slideIn 0.3s ease-out;
}

.notification-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.notification-message {
    flex: 1;
    font-weight: 500;
}

.notification-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background-color 0.2s ease;
}

.notification-close:hover {
    background: var(--bg-glass);
    color: var(--text-primary);
}

/* Animations */
@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

/* Settlements Styles */
.settlements-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.settlement-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1rem;
}

.card-subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 400;
}

.settlement-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    padding: 1.5rem;
    backdrop-filter: var(--glass-blur);
    transition: all 0.3s ease;
    margin-bottom: 1rem;
}

.settlement-item:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.settlement-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.settlement-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.settlement-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 1rem;
}

.settlement-details h4 {
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.settlement-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.settlement-amount {
    font-size: 1.25rem;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-small);
    background: var(--bg-glass);
}

.settlement-amount.debt {
    color: var(--error-color);
    background: rgba(255, 107, 107, 0.1);
}

.settlement-amount.credit {
    color: var(--success-color);
    background: rgba(67, 233, 123, 0.1);
}

.settlement-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
}

.settlement-actions .btn {
    flex: 1;
    justify-content: center;
}

.group-balance-section {
    margin-bottom: 2rem;
}

.group-balance-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    padding: 1rem;
    background: var(--bg-glass);
    border-radius: var(--border-radius-small);
    border: 1px solid var(--border-color);
}

.group-balance-header h4 {
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
}

.group-balance-total {
    margin-left: auto;
    font-size: 1rem;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-small);
    background: var(--bg-card);
}

.group-balance-total.positive {
    color: var(--success-color);
}

.group-balance-total.negative {
    color: var(--error-color);
}

.group-balance-total.neutral {
    color: var(--text-muted);
}

.balance-breakdown {
    display: grid;
    gap: 1rem;
}

.balance-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.balance-item-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.balance-item-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.9rem;
}

.balance-item-details span {
    display: block;
    color: var(--text-primary);
    font-weight: 500;
}

.balance-item-amount {
    font-weight: 600;
    font-size: 1rem;
}

.balance-item-amount.positive {
    color: var(--success-color);
}

.balance-item-amount.negative {
    color: var(--error-color);
}

.balance-item-amount.neutral {
    color: var(--text-muted);
}

/* Expense Actions */
.expense-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.expense-buttons {
    display: flex;
    gap: 0.5rem;
}

.expense-buttons .btn-icon {
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.expense-buttons .btn-icon:hover {
    background: var(--bg-card);
    border-color: var(--border-hover);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.expense-buttons .btn-icon[data-action="edit-expense"]:hover {
    color: var(--primary-color);
}

.expense-buttons .btn-icon[data-action="delete-expense"]:hover {
    color: var(--error-color);
}

/* Responsive adjustments for expense actions */
@media (max-width: 768px) {
    .expense-actions {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
    
    .expense-buttons {
        align-self: flex-end;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }
    
    .user-selector {
        margin-right: 0;
        order: 2;
        width: 100%;
        justify-content: center;
    }
    
    .nav {
        order: 3;
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .logo {
        order: 1;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .dashboard-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .dashboard-sections {
        grid-template-columns: 1fr;
    }
    
    .groups-grid {
        grid-template-columns: 1fr;
    }
    
    .view-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .modal-content {
        width: 95%;
        margin: 1rem;
    }
    
    .balance-overview {
        grid-template-columns: 1fr;
    }
    
    .expense-item {
        flex-direction: column;
        gap: 1rem;
    }
    
    .expense-user-amounts {
        align-items: flex-start;
    }
    
    .notification {
        right: 10px;
        left: 10px;
        max-width: none;
    }
    
    .nav-btn {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }
    
    .card-header {
        padding: 1rem;
    }
    
    .card-content {
        padding: 1rem;
    }
    
    .modal-header,
    .modal-body,
    .modal-footer {
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .header-content {
        padding: 0.75rem;
    }
    
    .main-content {
        padding: 0.75rem;
    }
    
    .nav-btn {
        padding: 0.5rem 0.75rem;
        font-size: 0.75rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }
    
    .card-header h3 {
        font-size: 1.1rem;
    }
    
    .balance-display,
    .stat-number {
        font-size: 2rem;
    }
}