/* Expense Splitter - Dark Theme with Colors */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-card: #1c2128;
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --accent-purple: #a855f7;
    --accent-blue: #3b82f6;
    --accent-green: #10b981;
    --accent-red: #ef4444;
    --accent-yellow: #f59e0b;
    --accent-cyan: #06b6d4;
    --border-color: #30363d;
    --hover-bg: #2c3239;
}

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
    padding-bottom: 80px; /* Adjusted to match footer height */
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px;
}

/* Header */
.header {
    background: var(--bg-card);
    padding: 15px 20px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
}

.header h1 {
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 24px;
    font-weight: 700;
}

.header-actions {
    display: flex;
    gap: 8px;
    align-items: center;
}

/* Buttons */
.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: 1px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
    color: white;
    border: 1px solid var(--accent-purple);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(168, 85, 247, 0.4);
}

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

.btn-secondary:hover {
    background: var(--hover-bg);
    border-color: var(--accent-blue);
}

/* Special styles for export/import buttons */
.btn-export {
    background: linear-gradient(135deg, var(--accent-green), #059669);
    color: white;
    border: 1px solid var(--accent-green);
}

.btn-export:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
}

.btn-import {
    background: linear-gradient(135deg, var(--accent-cyan), #0891b2);
    color: white;
    border: 1px solid var(--accent-cyan);
}

.btn-import:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.4);
}

.btn-small {
    padding: 4px 8px;
    font-size: 11px;
    border-radius: 6px;
}

.btn-danger {
    background: var(--accent-red);
    color: white;
    border: 1px solid var(--accent-red);
}

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4);
}

.btn-danger:disabled {
    background: var(--bg-tertiary);
    color: var(--text-muted);
    border-color: var(--border-color);
    cursor: not-allowed;
    opacity: 0.5;
}

.btn-danger:disabled:hover {
    transform: none;
    box-shadow: none;
}

/* Member card improvements */
.member-card {
    background: var(--bg-tertiary);
    padding: 12px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s ease;
}

.member-actions {
    display: flex;
    gap: 6px;
    align-items: center;
}

/* Expense item improvements */
.expense-item {
    background: var(--bg-tertiary);
    padding: 12px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    margin-bottom: 8px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    transition: all 0.2s ease;
}

.expense-right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
}

.expense-actions {
    display: flex;
    gap: 6px;
    align-items: center;
}

.expense-split-info {
    color: var(--text-muted);
    font-size: 11px;
    margin-top: 2px;
    font-style: italic;
}

/* Trip Card */
.trip-card {
    background: var(--bg-card);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
}

.trip-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.trip-info {
    flex: 1;
}

.trip-header h2 {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
    font-size: 20px;
    font-weight: 700;
}

.trip-header p {
    color: var(--text-secondary);
    font-size: 13px;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.stat-card {
    background: var(--bg-tertiary);
    padding: 16px 12px;
    border-radius: 10px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(135deg, var(--accent-green), var(--accent-blue));
    opacity: 0;
    transition: opacity 0.2s ease;
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent-purple);
    box-shadow: 0 4px 16px rgba(168, 85, 247, 0.2);
}

.stat-card:nth-child(1) h3 { 
    color: var(--accent-green); 
}

.stat-card:nth-child(1)::before {
    background: var(--accent-green);
}

.stat-card:nth-child(2) h3 { 
    color: var(--accent-blue); 
}

.stat-card:nth-child(2)::before {
    background: var(--accent-blue);
}

.stat-card:nth-child(3) h3 { 
    color: var(--accent-purple); 
}

.stat-card:nth-child(3)::before {
    background: var(--accent-purple);
}

.stat-card h3 {
    font-size: 22px;
    margin-bottom: 4px;
    font-weight: 700;
}

.stat-card p {
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 500;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* Welcome Screen */
.welcome {
    background: var(--bg-card);
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    text-align: center;
    border: 1px solid var(--border-color);
}

.welcome h2 {
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
    font-size: 26px;
    font-weight: 700;
}

.welcome p {
    color: var(--text-secondary);
    font-size: 16px;
    margin-bottom: 24px;
}

/* Members Grid */
.members-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
    margin-top: 12px;
}

.member-card {
    background: var(--bg-tertiary);
    padding: 12px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s ease;
}

.member-card:hover {
    border-color: var(--accent-blue);
    transform: translateY(-1px);
}

.member-info h4 {
    color: var(--text-primary);
    margin-bottom: 3px;
    font-size: 14px;
}

.member-info p {
    color: var(--text-muted);
    font-size: 11px;
}

/* Section Headers with Controls */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    flex-wrap: wrap;
    gap: 8px;
}

.section-header h3 {
    margin: 0;
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.count-badge {
    background: var(--accent-purple);
    color: white;
    font-size: 10px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 18px;
    text-align: center;
}

.expense-controls {
    display: flex;
    gap: 8px;
    align-items: center;
}

.member-controls {
    display: flex;
    gap: 8px;
    align-items: center;
}

.sort-select {
    padding: 6px 8px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    min-width: 140px;
}

.sort-select:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.1);
}

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

/* Expenses List */
.expenses-list {
    margin-top: 12px;
    display: grid;
    gap: 8px;
}

.expense-item {
    background: var(--bg-tertiary);
    padding: 12px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 12px;
    align-items: center;
    transition: all 0.2s ease;
}

.expense-item:hover {
    border-color: var(--accent-green);
    transform: translateX(2px);
}

.expense-info h4 {
    color: var(--text-primary);
    margin-bottom: 3px;
    font-size: 14px;
    font-weight: 600;
}

.expense-info p {
    color: var(--text-secondary);
    font-size: 12px;
    margin-bottom: 2px;
}

.expense-split-info {
    color: var(--text-muted);
    font-size: 11px;
    margin-top: 4px;
    font-style: italic;
    line-height: 1.3;
}

.expense-right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
    min-width: 120px;
}

.expense-amount {
    font-size: 16px;
    font-weight: 700;
    color: var(--accent-green);
}

.expense-actions {
    display: flex;
    gap: 6px;
    align-items: center;
}

/* Modal Styles */
.modal {
    display: none !important;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.8);
    backdrop-filter: blur(4px);
    overflow-y: auto;
}

.modal.show {
    display: block !important;
}

.modal-content {
    background: var(--bg-card);
    margin: 2% auto;
    border-radius: 12px;
    width: 90%;
    max-width: 480px;
    position: relative;
    animation: slideIn 0.3s ease;
    border: 1px solid var(--border-color);
    box-shadow: 0 8px 32px rgba(0,0,0,0.4);
    max-height: 95vh;
    display: flex;
    flex-direction: column;
    min-height: 200px;
}

@keyframes slideIn {
    from { transform: translateY(-30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.modal-header {
    padding: 20px 24px 0 24px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    position: relative;
}

.modal-body {
    padding: 20px 24px;
    overflow-y: auto;
    flex: 1;
    min-height: 0;
}

.modal-footer {
    padding: 0 24px 20px 24px;
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
    background: var(--bg-card);
    border-radius: 0 0 12px 12px;
}

.modal-content h3 {
    color: var(--text-primary);
    margin: 0 0 16px 0;
    font-size: 18px;
    font-weight: 600;
}

.close {
    color: var(--text-muted);
    float: right;
    font-size: 24px;
    font-weight: bold;
    position: absolute;
    right: 20px;
    top: 16px;
    cursor: pointer;
    transition: color 0.2s ease;
    z-index: 1001;
}

.close:hover {
    color: var(--accent-red);
}

/* Form Styles */
.modal-body form {
    display: flex;
    flex-direction: column;
    gap: 12px;
    height: 100%;
}

input, select, textarea {
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    transition: border-color 0.2s ease;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.1);
}

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

textarea {
    resize: vertical;
    min-height: 60px;
}

.datetime-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.modal-actions {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
    margin-top: 0;
}

.modal-actions .btn {
    min-width: 80px;
}

.modal-actions button[type="button"] {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.modal-actions button[type="button"]:hover {
    background: var(--hover-bg);
    border-color: var(--accent-red);
    color: var(--accent-red);
}

.modal-actions button[type="submit"] {
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
    color: white;
    border: 1px solid var(--accent-purple);
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.modal-actions button[type="submit"]:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(168, 85, 247, 0.4);
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    .container {
        padding: 8px;
    }
    
    .header {
        flex-direction: column;
        gap: 10px;
        text-align: center;
        padding: 12px 16px;
    }
    
    .header h1 {
        font-size: 20px;
    }
    
    .header-actions {
        flex-wrap: wrap;
        justify-content: center;
        gap: 6px;
    }
    
    .trip-card {
        padding: 16px;
        margin-bottom: 10px;
    }
    
    .trip-header {
        flex-direction: column;
        gap: 8px;
        text-align: center;
        margin-bottom: 12px;
    }
    
    .trip-info {
        text-align: center;
    }
    
    .trip-header h2 {
        font-size: 18px;
    }
    
    .trip-header p {
        font-size: 12px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
        margin-bottom: 16px;
    }
    
    .stat-card {
        padding: 12px 8px;
    }
    
    .stat-card h3 {
        font-size: 18px;
    }
    
    .stat-card p {
        font-size: 11px;
    }
    
    .action-buttons {
        justify-content: center;
        gap: 6px;
    }
    
    .btn {
        padding: 6px 12px;
        font-size: 12px;
    }
    
    .btn-large {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    .welcome {
        padding: 24px 20px;
    }
    
    .welcome h2 {
        font-size: 22px;
        margin-bottom: 8px;
    }
    
    .welcome p {
        font-size: 14px;
        margin-bottom: 20px;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .expense-controls {
        align-self: stretch;
        justify-content: flex-end;
    }
    
    .member-controls {
        align-self: stretch;
        justify-content: flex-end;
    }
    
    .sort-select {
        min-width: 120px;
        font-size: 11px;
    }
    
    .members-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
    
    .member-card {
        padding: 10px;
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
        text-align: left;
    }
    
    .member-info h4 {
        font-size: 13px;
    }
    
    .member-info p {
        font-size: 10px;
    }
    
    .member-actions {
        align-self: flex-end;
        width: 100%;
        justify-content: flex-end;
    }
    
    .expense-item {
        padding: 10px;
        grid-template-columns: 1fr;
        gap: 8px;
        text-align: left;
    }
    
    .expense-right {
        align-self: stretch;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        min-width: auto;
    }
    
    .expense-amount {
        font-size: 14px;
    }
    
    .modal-content {
        margin: 1% auto;
        width: 95%;
        max-height: 98vh;
    }
    
    .modal-header {
        padding: 16px 20px 0 20px;
    }
    
    .modal-body {
        padding: 16px 20px;
    }
    
    .modal-footer {
        padding: 0 20px 16px 20px;
    }
    
    .close {
        right: 16px;
        top: 12px;
        font-size: 22px;
    }
    
    .modal-actions {
        flex-direction: column;
        gap: 8px;
    }
    
    #split-config {
        max-height: 50vh;
    }
    
    .balance-grid {
        grid-template-columns: 1fr;
        gap: 8px;
    }
    
    .balance-card {
        padding: 12px;
    }
    
    .settlement-item {
        padding: 10px;
        margin-bottom: 6px;
    }
}

/* Success/Error Messages */
.message {
    padding: 12px 16px;
    margin: 10px 0;
    border-radius: 8px;
    font-weight: 500;
    font-size: 14px;
    border: 1px solid;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from { transform: translateY(-10px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.message.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-green);
    border-color: rgba(16, 185, 129, 0.3);
}

.message.error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--accent-red);
    border-color: rgba(239, 68, 68, 0.3);
}

/* Settlement Overview (Consolidated) */
.settlement-section {
    background: var(--bg-card);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
}

.settlement-section h3 {
    color: var(--text-primary);
    margin-bottom: 16px;
    font-size: 16px;
    font-weight: 600;
}

/* Chart Controls */
.chart-controls {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    justify-content: center;
}

.chart-toggle {
    min-width: 140px;
}

.chart-toggle.active {
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
    color: white;
    border-color: var(--accent-purple);
}

.chart-summary {
    margin-top: 16px;
    padding: 12px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    font-size: 12px;
    color: var(--text-secondary);
    text-align: center;
}

/* Mobile optimizations for new structure */
@media (max-width: 768px) {
    .chart-controls {
        flex-direction: column;
        gap: 6px;
    }
    
    .chart-toggle {
        min-width: auto;
    }
}

/* Balance Overview */
.balance-section, .settlements-section, .chart-section {
    background: var(--bg-card);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
}

.balance-section h3, .settlements-section h3, .chart-section h3 {
    color: var(--text-primary);
    margin-bottom: 16px;
    font-size: 16px;
    font-weight: 600;
}

.balance-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    margin-top: 12px;
}

.balance-card {
    background: var(--bg-tertiary);
    padding: 16px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
    cursor: pointer;
}

.balance-card.positive {
    border-color: var(--accent-green);
    background: rgba(16, 185, 129, 0.05);
}

.balance-card.negative {
    border-color: var(--accent-red);
    background: rgba(239, 68, 68, 0.05);
}

.balance-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

.balance-name {
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-primary);
    font-size: 14px;
}

.balance-amount {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 4px;
}

.balance-amount.positive {
    color: var(--accent-green);
}

.balance-amount.negative {
    color: var(--accent-red);
}

.balance-status {
    font-size: 11px;
    margin-top: 4px;
    opacity: 0.8;
    color: var(--text-muted);
    font-weight: 500;
}

/* Settlements */
.settlements-list {
    margin-top: 12px;
}

.settlement-item {
    background: var(--bg-tertiary);
    padding: 12px;
    border-radius: 10px;
    margin-bottom: 8px;
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.settlement-item:hover {
    transform: translateX(4px);
    border-color: var(--accent-yellow);
}

.settlement-text {
    font-size: 14px;
    color: var(--text-primary);
    font-weight: 500;
}

.settlement-amount {
    font-weight: 700;
    color: var(--accent-yellow);
}

/* Split Options */
.split-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin: 12px 0;
}

.split-options label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.2s ease;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 14px;
}

.split-options label:hover {
    border-color: var(--accent-blue);
    background: rgba(59, 130, 246, 0.05);
}

.split-options input[type="radio"]:checked + span {
    color: var(--accent-blue);
    font-weight: 600;
}

/* Split Configuration */
#split-config {
    background: var(--bg-tertiary);
    padding: 16px;
    border-radius: 10px;
    margin-top: 12px;
    border: 1px solid var(--border-color);
    /* Ensure this section can be scrolled if it gets too long */
    max-height: 60vh;
    overflow-y: auto;
}

.split-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    flex-wrap: wrap;
    gap: 8px;
}

.split-header p {
    margin: 0;
    font-weight: 600;
    color: var(--accent-blue);
    font-size: 13px;
}

.split-tally {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
}

.tally-amount {
    color: var(--text-primary);
    background: var(--bg-card);
    padding: 4px 8px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    min-width: 60px;
    text-align: center;
}

.tally-status {
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 700;
}

.tally-status.valid {
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-green);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.tally-status.invalid {
    background: rgba(239, 68, 68, 0.1);
    color: var(--accent-red);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.tally-status.warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--accent-yellow);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

/* Split Input Grids */
.split-inputs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 10px;
    margin-top: 12px;
}

.member-checkboxes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 8px;
    margin-top: 8px;
}

.split-input-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.split-input-item label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    border: none;
    background: none;
}

.split-input-item input {
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 13px;
    transition: border-color 0.2s ease;
}

.split-input-item input:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.1);
}

.split-input-item input.invalid {
    border-color: var(--accent-red);
    background: rgba(239, 68, 68, 0.05);
}

.split-input-item input.valid {
    border-color: var(--accent-green);
    background: rgba(16, 185, 129, 0.05);
}

/* Shares Breakdown */
.shares-breakdown {
    margin-top: 12px;
    padding: 12px;
    background: var(--bg-card);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.shares-breakdown h4 {
    margin: 0 0 8px 0;
    font-size: 12px;
    color: var(--accent-cyan);
    font-weight: 600;
}

.share-breakdown-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4px 0;
    font-size: 11px;
    color: var(--text-secondary);
}

.share-breakdown-item:last-child {
    border-top: 1px solid var(--border-color);
    padding-top: 8px;
    margin-top: 4px;
    font-weight: 600;
    color: var(--text-primary);
}

/* Member Checkboxes for Select Equal */
.member-checkboxes-grid label {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    background: var(--bg-card);
    font-size: 12px;
    transition: all 0.2s ease;
}

.member-checkboxes-grid label:hover {
    background: rgba(59, 130, 246, 0.05);
    border-color: var(--accent-blue);
}

.member-checkboxes-grid input[type="checkbox"]:checked + span {
    color: var(--accent-blue);
    font-weight: 600;
}

/* Mobile Optimizations for Split Options */
@media (max-width: 768px) {
    .split-inputs-grid {
        grid-template-columns: 1fr;
        gap: 8px;
    }
    
    .member-checkboxes-grid {
        grid-template-columns: 1fr;
        gap: 6px;
    }
    
    .split-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .split-tally {
        align-self: stretch;
        justify-content: space-between;
    }
}

/* Chart Section */
.chart-section {
    text-align: center;
}

#expense-chart {
    max-width: 100%;
    height: 300px !important;
}

@media (max-width: 768px) {
    #expense-chart {
        height: 250px !important;
    }
}

/* Loading state */
.loading {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(168, 85, 247, 0.3);
    border-radius: 50%;
    border-top-color: var(--accent-purple);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Footer styling */
footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: rgba(25, 25, 25, 0.95);
    backdrop-filter: blur(10px);
    border-top: 1px solid #333;
    z-index: 1000;
    box-shadow: 0 -2px 8px rgba(0,0,0,0.3);
    padding: 15px 0; /* Increased padding for better height */
    text-align: center;
}

footer img {
    max-height: 24px; /* Adjusted height for better visibility */
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

footer img:hover {
    opacity: 1;
}