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

:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --danger-color: #ef4444;
    --danger-hover: #dc2626;
    --background-color: #f8fafc;
    --card-background: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
    line-height: 1.6;
    background-color: var(--background-color);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 1rem;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background-color: var(--card-background);
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    width: 100%;
}

.app-header {
    display: flex;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    position: relative;
    background-color: var(--card-background);
}

.back-button {
    position: absolute;
    left: 1.5rem;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.back-button:hover {
    background-color: var(--background-color);
}

.back-button.hidden {
    display: none;
}

h1 {
    text-align: center;
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 700;
    width: 100%;
}

h2 {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.main-content {
    padding: 2rem;
    position: relative;
    min-height: 600px;
    display: flex;
    gap: 2rem;
}

.section {
    background-color: var(--card-background);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.participants-section {
    width: 400px;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.participants-section.confirmed {
    width: 300px;
    flex-shrink: 0;
}

.participants-container {
    flex: 1;
    margin-bottom: 1rem;
}

.expenses-section {
    flex: 1;
    display: none;
    flex-direction: column;
}

.expenses-section.show {
    display: flex;
}

.expenses-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.expense-header {
    display: grid;
    grid-template-columns: 2fr 0.8fr 1.8fr 1.2fr 0.5fr;
    gap: 0.5rem;
    padding: 1rem;
    margin-bottom: 1rem;
    background-color: var(--background-color);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    animation: fadeIn 0.3s ease-out;
}

.expense-header-item {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
    text-align: center;
}

.expense-header-item:first-child {
    text-align: center;
    margin-left: -1.5rem;
}

.expense-header-item:nth-child(2) {
    text-align: right;
}

.expense-header-item:nth-child(3) {
    text-align: right;
}

.expense-header-item:nth-child(4) {
    text-align: right;
}

.expense-header-item:last-child {
    text-align: center;
}

.expense-header-info {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 1rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 0.5rem 0;
    margin-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.expense-header-title {
    text-align: left;
}

.expense-header-amount {
    text-align: right;
}

.expense-header-payer {
    text-align: right;
}

.expense-header-excluded {
    text-align: left;
}

.expense-item {
    display: grid;
    grid-template-columns: 2fr 0.8fr 1.8fr 1.2fr 0.5fr;
    gap: 0.5rem;
    align-items: center;
    padding: 0.75rem;
    background-color: var(--card-background);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
    position: relative;
    animation: slideIn 0.3s ease-out;
}

.expense-item input[type="text"] {
    text-align: center;
    min-width: 200px;
    font-size: 0.95rem;
    height: 36px;
    padding: 0.5rem;
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.2s ease;
}

.expense-item input[type="number"] {
    text-align: center;
    min-width: 100px;
    font-size: 0.95rem;
    height: 36px;
    padding: 0.5rem;
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.2s ease;
}

.expense-info {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 1rem;
    align-items: center;
    font-size: 0.95rem;
}

.expense-title {
    font-weight: 500;
    color: var(--text-primary);
    text-align: left;
    min-width: 80px;
}

.expense-amount {
    font-weight: 600;
    color: var(--primary-color);
    text-align: right;
    min-width: 70px;
    margin-right: 0;
    padding-right: 0;
}

.expense-payer {
    color: var(--text-secondary);
    text-align: left;
    min-width: 100px;
}

.expense-excluded {
    color: var(--danger-color);
    font-size: 0.9rem;
    text-align: left;
    min-width: 120px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.expense-detail {
    display: flex;
    justify-content: space-between;
    font-size: 0.65rem;
    color: var(--text-secondary);
}

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

.expense-item input[type="text"]:focus,
.expense-item input[type="number"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.payer-select {
    padding: 0.4rem;
    font-size: 0.95rem;
    height: 36px;
    width: 100%;
    text-align: left;
    padding-left: 0.5rem;
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-left: 0;
}

.payer-select option {
    text-align: left;
}

.payer-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.exclude-toggle {
    padding: 0.5rem 0.75rem;
    font-size: 0.95rem;
    height: 36px;
    width: 100%;
    text-align: center;
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.exclude-toggle:hover {
    background-color: var(--background-color);
    border-color: var(--primary-color);
}

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

.exclude-toggle.has-excluded {
    background-color: var(--background-color);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.exclude-toggle.has-excluded:hover {
    background-color: var(--primary-color);
    color: white;
}

.exclude-participants {
    position: absolute;
    bottom: 100%;
    right: 0;
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0.75rem;
    box-shadow: var(--shadow-lg);
    z-index: 10;
    display: none;
    min-width: 250px;
    margin-bottom: 0.5rem;
    animation: fadeIn 0.2s ease-out;
}

.exclude-participants.show {
    display: block;
}

.exclude-checkboxes {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
    max-height: 200px;
    overflow-y: auto;
}

.exclude-checkboxes label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem;
    background-color: var(--background-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
    white-space: nowrap;
}

.exclude-checkboxes label:hover {
    background-color: var(--border-color);
}

.exclude-checkboxes input[type="checkbox"] {
    width: 16px;
    height: 16px;
    border-radius: 4px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.remove-button {
    padding: 0.5rem;
    width: 32px;
    height: 32px;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: 0.5rem;
}

.remove-button:hover {
    background-color: var(--danger-color);
    border-color: var(--danger-color);
    color: white;
}

.remove-button svg {
    width: 16px;
    height: 16px;
}

.result-item {
    animation: slideIn 0.3s ease-out;
}

.settlement-step {
    animation: slideIn 0.3s ease-out;
}

.expense-detail {
    animation: fadeIn 0.3s ease-out;
}

.hidden {
    display: none !important;
}

.expense-detail {
    margin-bottom: 1rem;
    padding: 0.75rem;
    background-color: var(--card-background);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.expense-detail:last-child {
    margin-bottom: 0;
}

.expense-detail h5 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
}

.expense-detail ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.expense-detail li {
    padding: 0.4rem 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
}

.expense-detail li:last-child {
    border-bottom: none;
}

.expense-detail small {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.payer-select-container {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    position: relative;
}

.payer-nav-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.payer-nav {
    background-color: var(--background-color);
    color: var(--text-primary);
    padding: 0.2rem;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.7rem;
}

.payer-nav:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.exclude-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem;
    background-color: var(--background-color);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

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

.exclude-checkboxes {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.exclude-checkboxes label {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.5rem;
    background-color: var(--card-background);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.85rem;
    border: 1px solid var(--border-color);
}

.exclude-checkboxes label:hover {
    background-color: var(--border-color);
}

.exclude-checkboxes input[type="checkbox"] {
    width: 14px;
    height: 14px;
    border-radius: 3px;
    cursor: pointer;
}

.quick-payer {
    background-color: var(--background-color);
    color: var(--text-primary);
    padding: 0.4rem;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.2s ease;
}

.quick-payer:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

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

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

@media (max-width: 1024px) {
    .main-content {
        flex-direction: column;
        gap: 1rem;
    }

    .participants-section {
        width: 100%;
    }

    .participants-section.confirmed {
        width: 100%;
    }
}

@media (max-width: 768px) {
    body {
        padding: 0.5rem;
    }

    .container {
        border-radius: 0;
    }

    .main-content {
        padding: 0.75rem;
        min-height: auto;
    }

    .expense-header,
    .expense-item {
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
        padding: 0.75rem;
    }

    .expense-header-item,
    .expense-item > * {
        font-size: 0.9rem;
    }

    .expense-info {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }

    .expense-title {
        font-size: 1rem;
        font-weight: 600;
        margin-bottom: 0.25rem;
    }

    .expense-amount {
        font-size: 1.1rem;
        margin-right: 0;
        text-align: left;
    }

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

    .expense-excluded {
        font-size: 0.85rem;
        margin-top: 0.25rem;
    }

    .expense-detail {
        padding: 0.5rem;
    }

    .expense-detail h5 {
        font-size: 0.95rem;
    }

    .expense-detail li {
        font-size: 0.9rem;
        padding: 0.3rem 0;
    }

    .result-content {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .expense-details {
        grid-column: 1;
        grid-row: auto;
    }

    .settlement-container {
        grid-column: 1;
    }

    .settlement-cards {
        grid-template-columns: 1fr;
    }

    .settlement-card {
        padding: 0.5rem;
    }

    .settlement-name {
        font-size: 0.9rem;
    }

    .settlement-info {
        padding: 0.25rem;
    }

    .settlement-amount {
        font-size: 0.9rem;
    }

    .method-item {
        padding: 0.5rem;
        font-size: 0.9rem;
    }

    .expense-table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }

    .expense-table th,
    .expense-table td {
        padding: 0.4rem;
        font-size: 0.85rem;
    }

    .exclude-participants {
        min-width: 200px;
        max-width: 90vw;
    }

    .exclude-checkboxes {
        grid-template-columns: 1fr;
    }

    .exclude-checkboxes label {
        font-size: 0.85rem;
    }

    .payer-select {
        font-size: 0.9rem;
    }

    .exclude-toggle {
        font-size: 0.9rem;
        width: 100%;
    }
}

@media (max-width: 480px) {
    .app-header {
        padding: 1rem;
    }

    h1 {
        font-size: 1.25rem;
    }

    .expense-header,
    .expense-item {
        grid-template-columns: 1fr;
    }

    .expense-header-item {
        display: none;
    }

    .expense-header-item:first-child {
        display: block;
        text-align: left;
    }

    .expense-item {
        position: relative;
        padding: 0.75rem;
    }

    .expense-item::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--text-secondary);
        font-size: 0.8rem;
        margin-bottom: 0.25rem;
        display: block;
    }

    .expense-amount {
        font-size: 1.2rem;
    }

    .expense-payer {
        margin-top: 0.25rem;
    }

    .expense-excluded {
        margin-top: 0.25rem;
    }

    .remove-button {
        position: absolute;
        top: 0.5rem;
        right: 0.5rem;
    }

    .settlement-methods,
    .settlement-details {
        padding: 0.75rem;
    }

    .settlement-methods h3,
    .settlement-details h3 {
        font-size: 0.9rem;
    }
}

.participant-input {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    align-items: center;
}

.participant-input input {
    flex: 1;
    padding: 0.75rem;
    font-size: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.2s ease;
}

.participant-input input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.add-button {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--background-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.add-button:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.confirm-button {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.95rem;
    font-weight: 500;
}

.confirm-button:hover {
    background-color: var(--primary-hover);
}

.settle-button {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.95rem;
    font-weight: 500;
    margin-top: 0.5rem;
}

.settle-button:hover {
    background-color: var(--primary-hover);
}

.result-header {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background-color: var(--background-color);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.result-header h3 {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.result-summary {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.result-item {
    padding: 1rem;
    background-color: var(--card-background);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    margin-bottom: 1rem;
    animation: slideIn 0.3s ease-out;
}

.result-item:last-child {
    margin-bottom: 0;
}

.participant-result {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.participant-result .participant-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.settlement-details {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.settlement-details .balance {
    font-weight: 600;
    margin-top: 0.5rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--border-color);
}

.settlement-details .balance.positive {
    color: #10b981;
}

.settlement-details .balance.negative {
    color: var(--danger-color);
}

@media (max-width: 768px) {
    .result-summary {
        flex-direction: column;
        gap: 0.5rem;
    }
}

#result-section {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0.75rem;
}

#result-container {
    width: 100%;
}

.result-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.expense-details {
    background-color: var(--card-background);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    padding: 0.75rem;
    grid-column: 1;
    grid-row: 1 / span 2;
}

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

.expense-result-item {
    padding: 0.5rem;
    background-color: var(--background-color);
    border-radius: 6px;
}

.expense-info {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 1rem;
    align-items: center;
    font-size: 0.95rem;
}

.expense-title {
    font-weight: 500;
    color: var(--text-primary);
    text-align: left;
    min-width: 80px;
}

.expense-amount {
    font-weight: 600;
    color: var(--primary-color);
    text-align: right;
    min-width: 70px;
    margin-right: 2rem;
}

.expense-payer {
    color: var(--text-secondary);
    text-align: left;
    min-width: 100px;
}

.expense-excluded {
    color: var(--danger-color);
    font-size: 0.9rem;
    text-align: left;
    min-width: 120px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.settlement-container {
    grid-column: 2;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.settlement-methods,
.settlement-details {
    background-color: var(--card-background);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    padding: 1rem;
}

.settlement-methods h3,
.settlement-details h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.settlement-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.settlement-card {
    background-color: var(--background-color);
    border-radius: 6px;
    padding: 0.75rem;
}

.settlement-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    padding-left: 0.5rem;
}

.settlement-info {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    padding: 0.5rem;
}

.settlement-amount {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.95rem;
    padding: 0.3rem 0;
}

.amount-label {
    color: var(--text-secondary);
    min-width: 50px;
}

.amount-value {
    font-weight: 500;
    color: var(--text-primary);
}

.settlement-divider {
    height: 1px;
    background-color: var(--border-color);
    margin: 0.3rem 0;
}

.settlement-balance {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.2rem 0;
}

.settlement-balance.positive .amount-value {
    color: #10b981;
}

.settlement-balance.negative .amount-value {
    color: var(--danger-color);
}

.method-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.75rem;
    background-color: var(--background-color);
    border-radius: 6px;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.method-item:last-child {
    margin-bottom: 0;
}

.method-arrow {
    color: var(--text-secondary);
}

.method-amount {
    margin-left: auto;
    font-weight: 500;
    color: var(--primary-color);
}

.skeleton-loading {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    width: 100%;
}

.skeleton-expense-details,
.skeleton-settlement-details {
    background-color: var(--card-background);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    padding: 1rem;
}

.skeleton-header {
    height: 24px;
    width: 120px;
    background: linear-gradient(90deg, 
        var(--background-color) 25%, 
        var(--border-color) 50%, 
        var(--background-color) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.skeleton-item {
    height: 48px;
    background: linear-gradient(90deg, 
        var(--background-color) 25%, 
        var(--border-color) 50%, 
        var(--background-color) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 8px;
    margin-bottom: 0.75rem;
}

.skeleton-item:last-child {
    margin-bottom: 0;
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

.participant-name {
    font-weight: 500;
}

.method-detail .from.participant-name {
    color: var(--text-primary);
}

.method-detail .to.participant-name {
    color: var(--text-primary);
}

.expense-participants .participant-name {
    color: var(--text-primary);
}

.result-section {
    display: none;
}

.result-section:not(.hidden) {
    display: block;
}

.settlement-details h3,
.settlement-methods h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.settlement-divider {
    height: 1px;
    background-color: var(--border-color);
    margin: 0.5rem 0;
}

.expense-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 0.5rem;
}

.expense-table th,
.expense-table td {
    padding: 0.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.expense-table th {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-align: center;
}

.expense-table td {
    font-size: 0.95rem;
    text-align: center;
}

.expense-table th.expense-header-amount,
.expense-table td.expense-amount {
    text-align: center;
}

.expense-table th.expense-header-payer,
.expense-table td.expense-payer {
    text-align: center;
}

.expense-table th.expense-header-excluded,
.expense-table td.expense-excluded {
    text-align: center;
}

.expense-table td.expense-amount {
    color: var(--primary-color);
    font-weight: 600;
}

.expense-table td.expense-excluded {
    color: var(--danger-color);
    font-size: 0.9rem;
}

.settlement-info {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.settlement-amount {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.95rem;
}

.amount-label {
    color: var(--text-secondary);
}

.amount-value {
    font-weight: 500;
    color: var(--text-primary);
}

.settlement-divider {
    height: 1px;
    background-color: var(--border-color);
    margin: 0.5rem 0;
}

.settlement-balance {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 0.95rem;
    margin-top: 0.3rem;
}

.settlement-balance.positive .amount-value {
    color: #10b981;
}

.settlement-balance.negative .amount-value {
    color: var(--danger-color);
}

.footer {
    margin-top: 2rem;
    padding: 1.5rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
    background-color: var(--card-background);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-items: center;
    justify-content: center;
}

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

@media (max-width: 768px) {
    .footer {
        margin-top: 1rem;
        padding: 1rem;
    }
}