/* Expense Split Calculator - Modern Slick Design */

/* ===============================================
   MODERN TOOL HEADER DESIGN
   =============================================== */
.tool-header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 3rem 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--info-color) 100%);
    border-radius: var(--radius-xl);
    color: white;
    position: relative;
    overflow: hidden;
}

.tool-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    pointer-events: none;
}

.tool-header h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    position: relative;
    z-index: 1;
}

.tool-header p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

/* ===============================================
   MODERN SECTION CONTAINERS
   =============================================== */
.setup-section,
.expenses-section,
.results-section,
.export-section,
.templates-section {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.setup-section::before,
.expenses-section::before,
.results-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--info-color), var(--success-color));
}

.setup-section:hover,
.expenses-section:hover,
.results-section:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--border-hover);
}

/* ===============================================
   SECTION HEADERS
   =============================================== */
.setup-header,
.expenses-header,
.results-header,
.export-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid var(--bg-tertiary);
    position: relative;
}

.setup-header h2,
.expenses-header h2,
.results-header h2,
.export-header h3 {
    margin: 0;
    color: var(--text-primary);
    font-size: 1.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.setup-header h2 i,
.expenses-header h2 i,
.results-header h2 i,
.export-header h3 i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.setup-actions,
.results-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

/* ===============================================
   MODERN BUTTON SYSTEM
   =============================================== */
.btn {
    padding: 0.875rem 1.75rem;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s;
}

.btn:hover::before {
    left: 100%;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, var(--primary-hover), var(--primary-color));
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary-color), #475569);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-secondary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: var(--bg-card);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.btn-outline:hover:not(:disabled) {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.btn-outline-sm:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    border-radius: var(--radius-md);
}

.btn-danger {
    background: linear-gradient(135deg, var(--error-color), #dc2626);
    color: white;
    box-shadow: var(--shadow-md);
}

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

/* ===============================================
   MODERN FORM ELEMENTS
   =============================================== */
.group-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.group-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-group label i {
    color: var(--primary-color);
    font-size: 1rem;
}

.form-input {
    padding: 1rem 1.25rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition);
    background: var(--bg-secondary);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

.form-input:focus {
    outline: none;
    border-color: var(--border-focus);
    background: var(--bg-card);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
    transform: translateY(-1px);
}

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

/* ===============================================
   MEMBERS SECTION
   =============================================== */
.members-section h3 {
    margin: 0 0 1.5rem 0;
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.members-section h3 i {
    color: var(--primary-color);
}

.member-input {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

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

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

.member-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.member-item:hover {
    background: var(--bg-tertiary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-hover);
}

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

.member-avatar {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    box-shadow: var(--shadow-md);
    position: relative;
}

.member-avatar::before {
    content: '';
    position: absolute;
    inset: -2px;
    padding: 2px;
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    border-radius: inherit;
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask-composite: exclude;
}

.member-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.05rem;
}

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

/* ===============================================
   EXPENSES SECTION
   =============================================== */
.expenses-summary {
    display: flex;
    gap: 2rem;
    align-items: center;
    flex-wrap: wrap;
}

.summary-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
    box-shadow: var(--shadow-sm);
}

.summary-item i {
    color: var(--primary-color);
    font-size: 1.1rem;
}

.summary-item span {
    color: var(--primary-color);
    font-weight: 700;
}

.expense-form {
    background: var(--bg-secondary);
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
    box-shadow: var(--shadow-md);
    position: relative;
}

.expense-form::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--success-color), var(--warning-color));
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.form-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

/* ===============================================
   SPLIT OPTIONS
   =============================================== */
.split-options {
    margin: 2.5rem 0;
}

.split-options h4 {
    margin: 0 0 1.5rem 0;
    color: var(--text-primary);
    font-size: 1.2rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.split-options h4 i {
    color: var(--primary-color);
}

.split-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.split-method {
    display: block;
    cursor: pointer;
    border-radius: var(--radius-lg);
    transition: var(--transition);
    overflow: hidden;
    position: relative;
}

.split-method:hover {
    transform: translateY(-3px);
}

.split-method input[type="radio"] {
    display: none;
}

.split-method input[type="radio"]:checked + .method-label {
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.method-label {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.5rem;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.method-label::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.1), transparent);
    transition: left 0.5s;
}

.method-label:hover::before {
    left: 100%;
}

.method-label:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.method-label i {
    font-size: 1.75rem;
    color: var(--primary-color);
    min-width: 28px;
    background: var(--bg-secondary);
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.split-method input[type="radio"]:checked + .method-label i {
    color: white;
    background: rgba(255, 255, 255, 0.2);
}

.method-label div {
    flex: 1;
}

.method-label strong {
    display: block;
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.split-method input[type="radio"]:checked + .method-label strong {
    color: white;
}

.method-label small {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.4;
}

.split-method input[type="radio"]:checked + .method-label small {
    color: rgba(255, 255, 255, 0.9);
}

.split-details {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.split-detail-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid var(--bg-tertiary);
}

.split-detail-item:last-child {
    border-bottom: none;
}

.split-detail-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
}

.split-detail-input {
    width: 140px;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-align: right;
    font-weight: 600;
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: var(--transition);
}

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

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
}

/* ===============================================
   EXPENSES LIST
   =============================================== */
.expenses-list {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.expense-item {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.expense-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--primary-color), var(--info-color));
}

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

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

.expense-title {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 1.3rem;
}

.expense-amount {
    font-weight: 800;
    color: var(--primary-color);
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.expense-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.expense-detail {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.expense-detail-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.expense-detail-value {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.expense-split {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.expense-split h5 {
    margin: 0 0 1rem 0;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.expense-split h5 i {
    color: var(--primary-color);
}

.split-breakdown {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem;
}

.split-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.split-item:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.split-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.split-amount {
    font-weight: 700;
    color: var(--primary-color);
    font-size: 1rem;
}

.expense-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
    margin-top: 1rem;
}

/* ===============================================
   RESULTS SECTION
   =============================================== */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.summary-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 2rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.summary-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--info-color));
}

.summary-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.card-icon {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    box-shadow: var(--shadow-lg);
    position: relative;
}

.card-icon::before {
    content: '';
    position: absolute;
    inset: -3px;
    padding: 3px;
    border-radius: inherit;
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask-composite: exclude;
}

.card-icon.total {
    background: linear-gradient(135deg, var(--success-color), #059669);
}

.card-icon.total::before {
    background: linear-gradient(135deg, var(--success-color), #059669);
}

.card-icon.per-person {
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
}

.card-icon.per-person::before {
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
}

.card-icon.transactions {
    background: linear-gradient(135deg, var(--warning-color), #d97706);
}

.card-icon.transactions::before {
    background: linear-gradient(135deg, var(--warning-color), #d97706);
}

.card-content {
    flex: 1;
}

.card-value {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.card-label {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===============================================
   RESPONSIVE DESIGN
   =============================================== */
@media (max-width: 1024px) {
    .group-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .split-methods {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .summary-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .tool-header {
        padding: 2rem 1rem;
    margin-bottom: 2rem;
}

    .tool-header h1 {
        font-size: 2.25rem;
        flex-direction: column;
    gap: 0.5rem;
}

    .setup-section,
    .expenses-section,
    .results-section {
        padding: 1.5rem;
        margin-bottom: 1.5rem;
    }
    
    .setup-header,
    .expenses-header,
    .results-header {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    gap: 1rem;
    }
    
    .setup-actions,
    .results-actions {
        justify-content: center;
    }
    
    .member-input {
        flex-direction: column;
        gap: 1rem;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .split-methods {
        grid-template-columns: 1fr;
    }
    
    .summary-cards {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .expenses-summary {
        justify-content: center;
        text-align: center;
    }
    
    .method-label {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .method-label i {
        width: 48px;
        height: 48px;
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .tool-header {
        padding: 1.5rem 1rem;
    }
    
    .tool-header h1 {
        font-size: 1.875rem;
    }
    
    .setup-section,
    .expenses-section,
    .results-section {
        padding: 1rem;
    }
    
    .expense-details {
        grid-template-columns: 1fr;
    }
    
    .expense-header {
    flex-direction: column;
        align-items: stretch;
    gap: 1rem;
        text-align: center;
    }
    
    .summary-card {
        padding: 1.5rem;
        flex-direction: column;
        text-align: center;
    }
    
    .card-icon {
        width: 56px;
        height: 56px;
        font-size: 1.5rem;
    }
    
    .card-value {
        font-size: 1.875rem;
    }
    
    .split-breakdown {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        gap: 1rem;
    }
    
    .method-label {
    padding: 1rem;
    }
}

/* Modern Modal Dialogs */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    opacity: 0;
    animation: modalFadeIn 0.3s ease forwards;
}

@keyframes modalFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-container {
    background: var(--bg-card);
    border-radius: 16px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 
                0 10px 10px -5px rgba(0, 0, 0, 0.04);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow: hidden;
    transform: scale(0.9) translateY(-20px);
    animation: modalSlideIn 0.3s ease forwards;
    border: 1px solid var(--border-color);
}

@keyframes modalSlideIn {
    from { 
        transform: scale(0.9) translateY(-20px);
        opacity: 0;
    }
    to { 
        transform: scale(1) translateY(0);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    color: white;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: white;
}

.modal-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.modal-body {
    padding: 1.5rem;
    max-height: 60vh;
    overflow-y: auto;
    background: var(--bg-card);
}

.modal-body p {
    margin: 0 0 1rem 0;
    color: var(--text-primary);
    font-size: 1rem;
    line-height: 1.5;
}

.modal-footer {
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

/* Save Group Modal Specific */
#saveGroupName {
    width: 100%;
    margin-bottom: 0.5rem;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    color: var(--text-primary);
    background: var(--bg-card);
    transition: all 0.3s ease;
}

#saveGroupName:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.form-help {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* Load Group Modal Specific */
.saved-groups-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-height: 300px;
    overflow-y: auto;
}

.saved-group-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.saved-group-item:hover {
    border-color: var(--primary-color);
    background: var(--bg-tertiary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.saved-group-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.saved-group-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
}

.saved-group-details {
    font-size: 0.875rem;
    color: var(--text-muted);
}

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

.saved-group-actions button {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
    background: var(--error-color);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.saved-group-actions button:hover {
    background: #dc2626;
    transform: scale(1.05);
}

.no-groups-message {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
}

.no-groups-message p {
    margin: 0;
    font-size: 1rem;
}

/* New Group Modal Specific */
.warning-message {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: 8px;
    color: var(--text-primary);
}

.warning-message i {
    color: var(--error-color);
    font-size: 1.5rem;
    margin-top: 0.25rem;
    flex-shrink: 0;
}

.warning-message h4 {
    margin: 0 0 0.5rem 0;
    color: var(--error-color);
    font-size: 1.1rem;
    font-weight: 600;
}

.warning-message p {
    margin: 0.25rem 0;
    color: var(--text-primary);
    line-height: 1.5;
}

/* Modal Button Styles */
.modal-footer .btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

.modal-footer .btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: white;
    box-shadow: var(--shadow-md);
}

.modal-footer .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, var(--primary-hover), var(--primary-color));
}

.modal-footer .btn-secondary {
    background: var(--secondary-color);
    color: white;
    box-shadow: var(--shadow-md);
}

.modal-footer .btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: #4b5563;
}

.modal-footer .btn-danger {
    background: linear-gradient(135deg, var(--error-color), #dc2626);
    color: white;
    box-shadow: var(--shadow-md);
}

.modal-footer .btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, #dc2626, #b91c1c);
}

/* Responsive Modal Design */
@media (max-width: 768px) {
    .modal-overlay {
        padding: 0.5rem;
    }
    
    .modal-container {
        max-width: 100%;
    border-radius: 12px;
    }
    
    .modal-header {
        padding: 1rem;
    }
    
    .modal-header h3 {
        font-size: 1.125rem;
    }
    
    .modal-body {
        padding: 1rem;
    }
    
    .modal-footer {
        padding: 0.75rem 1rem;
        flex-direction: column-reverse;
    }
    
    .modal-footer .btn {
        width: 100%;
        justify-content: center;
    }
    
    .saved-group-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
    
    .saved-group-actions {
        width: 100%;
        justify-content: flex-end;
    }
}

/* ===============================================
   SEO CONTENT SECTIONS
   =============================================== */

.seo-content {
    margin-top: 4rem;
    background: var(--bg-secondary);
}

.seo-content section {
    padding: 4rem 0;
    position: relative;
}

.seo-content section:nth-child(even) {
    background: var(--bg-card);
}

.seo-content h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 3rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.seo-content h2 i {
    color: var(--primary-color);
    font-size: 2rem;
}

/* How to Use Section */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.step-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.step-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--info-color));
}

.step-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.step-number {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 800;
    margin: 0 auto 2rem auto;
    box-shadow: var(--shadow-lg);
    position: relative;
}

.step-number::before {
    content: '';
    position: absolute;
    inset: -4px;
    padding: 4px;
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    border-radius: inherit;
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask-composite: exclude;
}

.step-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    text-align: center;
}

.step-content p {
    color: var(--text-secondary);
    line-height: 1.7;
    text-align: center;
    font-size: 1.1rem;
}

/* Why Use Section */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.benefit-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.benefit-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--success-color), var(--warning-color));
}

.benefit-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}

.benefit-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto 2rem auto;
    box-shadow: var(--shadow-lg);
}

.benefit-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.benefit-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 1rem;
}

/* Features Section */
.features-container {
    max-width: 1000px;
    margin: 0 auto;
}

.features-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.feature-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    padding: 2rem;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.feature-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-item i {
    font-size: 2rem;
    color: var(--primary-color);
    background: var(--bg-secondary);
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}

.feature-item h4 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.feature-item p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 1rem;
}

/* Use Cases Section */
.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.use-case-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.use-case-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--info-color), var(--success-color));
}

.use-case-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}

.use-case-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--success-color), #059669);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto 2rem auto;
    box-shadow: var(--shadow-lg);
}

.use-case-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.use-case-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 1rem;
}

/* Tips Section */
.tips-container {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.tip-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    padding: 2rem;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.tip-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.tip-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--warning-color), #d97706);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: var(--shadow-md);
    flex-shrink: 0;
}

.tip-content h4 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.tip-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 1rem;
}

/* FAQ Section */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
        flex-direction: column;
    gap: 1rem;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    box-shadow: var(--shadow-lg);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    cursor: pointer;
    background: var(--bg-secondary);
    transition: var(--transition);
    border-bottom: 1px solid var(--border-color);
}

.faq-question:hover {
    background: var(--bg-tertiary);
}

.faq-question h4 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    flex: 1;
}

.faq-question i {
    color: var(--primary-color);
    font-size: 1rem;
    transition: transform var(--transition);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 2rem;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    background: var(--bg-card);
}

.faq-item.active .faq-answer {
    padding: 1.5rem 2rem;
    max-height: 200px;
}

.faq-answer p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 1rem;
    margin: 0;
}

/* Responsive SEO Content */
@media (max-width: 1024px) {
    .steps-grid,
    .benefits-grid,
    .use-cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .features-list,
    .tips-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .seo-content section {
        padding: 3rem 0;
    }
    
    .seo-content h2 {
        font-size: 2rem;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .steps-grid,
    .benefits-grid,
    .use-cases-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .step-card,
    .benefit-card,
    .use-case-card {
        padding: 2rem;
    }
    
    .feature-item,
    .tip-item {
        flex-direction: column;
        text-align: center;
        padding: 1.5rem;
    }
    
    .feature-item i,
    .tip-icon {
        margin: 0 auto 1rem auto;
    }
    
    .faq-question {
        padding: 1rem 1.5rem;
    }
    
    .faq-answer {
        padding: 0 1.5rem;
    }
    
    .faq-item.active .faq-answer {
        padding: 1rem 1.5rem;
    }
}

@media (max-width: 480px) {
    .seo-content section {
        padding: 2rem 0;
    }
    
    .seo-content h2 {
        font-size: 1.75rem;
    }
    
    .step-card,
    .benefit-card,
    .use-case-card {
        padding: 1.5rem;
    }
    
    .step-number,
    .benefit-icon,
    .use-case-icon {
        width: 64px;
        height: 64px;
        font-size: 1.5rem;
    }
    
    .feature-item i,
    .tip-icon {
        width: 56px;
        height: 56px;
        font-size: 1.5rem;
    }
}