/**
 * Expense Tracker Frontend Styles
 * Mobile-first responsive design
 */

/* CSS Variables */
.et-frontend-wrap {
    --et-primary: #3b82f6;
    --et-primary-dark: #2563eb;
    --et-success: #10b981;
    --et-warning: #f59e0b;
    --et-danger: #ef4444;
    --et-bg: #f8fafc;
    --et-card: #ffffff;
    --et-border: #e2e8f0;
    --et-text: #1e293b;
    --et-text-secondary: #64748b;
    --et-radius: 12px;
    --et-radius-sm: 8px;
    --et-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --et-shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    max-width: 800px;
    margin: 0 auto;
    padding: 16px;
    color: var(--et-text);
}

/* Header */
.et-fe-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.et-fe-header h2 {
    margin: 0;
    font-size: 24px;
    font-weight: 700;
}

/* Buttons */
.et-fe-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    font-size: 15px;
    font-weight: 600;
    border: none;
    border-radius: var(--et-radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
}

.et-fe-btn-primary {
    background: var(--et-primary);
    color: white;
}

.et-fe-btn-primary:hover {
    background: var(--et-primary-dark);
}

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

.et-fe-btn-secondary:hover {
    background: var(--et-border);
}

.et-fe-btn-danger {
    background: var(--et-danger);
    color: white;
}

.et-fe-icon {
    font-size: 18px;
    font-weight: 700;
}

/* Statistics */
.et-fe-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 24px;
}

.et-fe-stat-card {
    background: var(--et-card);
    border: 1px solid var(--et-border);
    border-radius: var(--et-radius);
    padding: 16px;
    text-align: center;
}

.et-fe-stat-value {
    font-size: 22px;
    font-weight: 700;
    color: var(--et-primary);
    margin-bottom: 4px;
}

.et-fe-stat-label {
    font-size: 12px;
    color: var(--et-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Filters */
.et-fe-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
}

.et-fe-filter-group {
    flex: 1;
    min-width: 140px;
}

.et-fe-input,
.et-fe-select {
    width: 100%;
    padding: 12px 14px;
    font-size: 15px;
    border: 1px solid var(--et-border);
    border-radius: var(--et-radius-sm);
    background: var(--et-card);
    transition: border-color 0.2s ease;
}

.et-fe-input:focus,
.et-fe-select:focus {
    outline: none;
    border-color: var(--et-primary);
}

/* Expenses List */
.et-fe-expenses-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.et-fe-expense-card {
    background: var(--et-card);
    border: 1px solid var(--et-border);
    border-radius: var(--et-radius);
    padding: 16px;
    transition: box-shadow 0.2s ease;
}

.et-fe-expense-card:hover {
    box-shadow: var(--et-shadow);
}

.et-fe-expense-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 8px;
}

.et-fe-expense-date {
    font-size: 13px;
    color: var(--et-text-secondary);
}

.et-fe-expense-amount {
    font-size: 20px;
    font-weight: 700;
    color: var(--et-text);
}

.et-fe-expense-description {
    font-size: 15px;
    color: var(--et-text);
    margin-bottom: 12px;
    line-height: 1.4;
}

.et-fe-expense-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.et-fe-expense-category {
    display: inline-flex;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 500;
    color: white;
    border-radius: 9999px;
}

.et-fe-expense-actions {
    display: flex;
    gap: 8px;
}

.et-fe-action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    background: transparent;
    border: 1px solid var(--et-border);
    border-radius: 50%;
    color: var(--et-text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 16px;
}

.et-fe-action-btn:hover {
    background: var(--et-bg);
    color: var(--et-text);
}

.et-fe-action-btn.has-receipt:hover {
    border-color: var(--et-success);
    color: var(--et-success);
}

.et-fe-action-btn.et-delete:hover {
    border-color: var(--et-danger);
    color: var(--et-danger);
}

/* Receipt Indicator */
.et-fe-receipt-btn {
    position: relative;
}

.et-fe-receipt-btn.has-receipt::after {
    content: '';
    position: absolute;
    top: -2px;
    right: -2px;
    width: 8px;
    height: 8px;
    background: var(--et-success);
    border-radius: 50%;
}

/* Loading */
.et-fe-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 40px;
    color: var(--et-text-secondary);
}

.et-fe-spinner {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid var(--et-border);
    border-top-color: var(--et-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Empty State */
.et-fe-empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--et-text-secondary);
}

.et-fe-empty-icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.et-fe-empty h3 {
    margin: 0 0 8px;
    font-size: 18px;
    color: var(--et-text);
}

.et-fe-empty p {
    margin: 0;
    font-size: 14px;
}

/* Pagination */
.et-fe-pagination {
    display: flex;
    justify-content: center;
    margin-top: 24px;
}

#et-fe-load-more {
    width: 100%;
    max-width: 300px;
}

/* Modal */
.et-fe-modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 99999;
    align-items: flex-end;
    justify-content: center;
}

.et-fe-modal.is-open {
    display: flex;
}

.et-fe-modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.2s ease;
}

.et-fe-modal-content {
    position: relative;
    width: 100%;
    max-width: 500px;
    max-height: 95vh;
    overflow-y: auto;
    background: var(--et-card);
    border-radius: var(--et-radius) var(--et-radius) 0 0;
    animation: slideUp 0.3s ease;
}

.et-fe-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--et-border);
    position: sticky;
    top: 0;
    background: var(--et-card);
    z-index: 1;
}

.et-fe-modal-header h3 {
    margin: 0;
    font-size: 18px;
}

.et-fe-modal-close {
    width: 32px;
    height: 32px;
    padding: 0;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--et-text-secondary);
    cursor: pointer;
}

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

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

/* Form */
#et-fe-expense-form {
    padding: 20px;
}

.et-fe-form-group {
    margin-bottom: 16px;
}

.et-fe-form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--et-text);
}

.et-fe-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.et-fe-amount-input {
    position: relative;
    display: flex;
    align-items: center;
}

.et-fe-currency {
    position: absolute;
    left: 14px;
    font-size: 20px;
    font-weight: 600;
    color: var(--et-text-secondary);
}

.et-fe-amount-input input {
    padding-left: 36px;
    font-size: 24px;
    font-weight: 600;
}

#et-fe-expense-form input,
#et-fe-expense-form select,
#et-fe-expense-form textarea {
    width: 100%;
    padding: 12px 14px;
    font-size: 16px;
    border: 1px solid var(--et-border);
    border-radius: var(--et-radius-sm);
    background: var(--et-card);
}

#et-fe-expense-form input:focus,
#et-fe-expense-form select:focus,
#et-fe-expense-form textarea:focus {
    outline: none;
    border-color: var(--et-primary);
}

#et-fe-expense-form textarea {
    resize: vertical;
    min-height: 80px;
}

/* Upload Zone */
.et-fe-upload-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 30px 20px;
    background: var(--et-bg);
    border: 2px dashed var(--et-border);
    border-radius: var(--et-radius);
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.et-fe-upload-zone:hover,
.et-fe-upload-zone.dragover {
    border-color: var(--et-primary);
    background: #eff6ff;
}

.et-fe-upload-icon {
    font-size: 32px;
    margin-bottom: 8px;
}

.et-fe-upload-zone p {
    margin: 0;
    font-size: 14px;
    color: var(--et-text-secondary);
}

.et-fe-upload-zone input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.et-fe-upload-preview {
    position: relative;
    border-radius: var(--et-radius);
    overflow: hidden;
}

.et-fe-upload-preview img {
    width: 100%;
    max-height: 200px;
    object-fit: cover;
    border-radius: var(--et-radius);
}

.et-fe-remove-preview {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 28px;
    height: 28px;
    padding: 0;
    background: rgba(0, 0, 0, 0.6);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 18px;
    cursor: pointer;
}

/* Form Actions */
.et-fe-form-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid var(--et-border);
}

.et-fe-form-actions .et-fe-btn {
    flex: 1;
}

/* Receipt Modal */
.et-fe-modal-receipt {
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.et-fe-modal-receipt img {
    max-width: 100%;
    max-height: 80vh;
    border-radius: var(--et-radius);
}

.et-fe-modal-receipt .et-fe-modal-close {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    border-radius: 50%;
}

/* Responsive - Larger Screens */
@media (min-width: 600px) {
    .et-fe-modal {
        align-items: center;
    }
    
    .et-fe-modal-content {
        border-radius: var(--et-radius);
        max-height: 90vh;
    }
    
    .et-fe-stat-value {
        font-size: 28px;
    }
}

/* Responsive - Small Screens */
@media (max-width: 480px) {
    .et-frontend-wrap {
        padding: 12px;
    }
    
    .et-fe-header h2 {
        font-size: 20px;
    }
    
    .et-fe-stats {
        grid-template-columns: 1fr;
    }
    
    .et-fe-stat-card {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 12px 16px;
    }
    
    .et-fe-stat-value {
        font-size: 18px;
        margin-bottom: 0;
    }
    
    .et-fe-filters {
        flex-direction: column;
    }
    
    .et-fe-filter-group {
        min-width: 100%;
    }
    
    .et-fe-form-row {
        grid-template-columns: 1fr;
    }
    
    .et-fe-expense-actions {
        flex-direction: column;
    }
}

/* Password Protection */
.et-password-protection {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
    padding: 20px;
}

.et-password-box {
    background: white;
    border-radius: 16px;
    padding: 48px;
    max-width: 400px;
    width: 100%;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.et-password-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    border-radius: 50%;
    margin-bottom: 24px;
    color: white;
}

.et-password-box h3 {
    margin: 0 0 8px;
    font-size: 24px;
    font-weight: 700;
    color: #1e293b;
}

.et-password-box > p {
    margin: 0 0 24px;
    color: #64748b;
}

.et-password-error {
    color: #ef4444;
    background: #fef2f2;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 14px;
}

.et-password-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.et-password-form input[type="password"] {
    width: 100%;
    padding: 14px 16px;
    font-size: 16px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    transition: border-color 0.2s;
    box-sizing: border-box;
}

.et-password-form input[type="password"]:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.et-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 24px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.et-btn-primary {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: white;
}

.et-btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.et-login-required {
    padding: 48px;
    text-align: center;
    color: #64748b;
    background: #f8fafc;
    border-radius: 12px;
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    .et-frontend-wrap {
        --et-bg: #0f172a;
        --et-card: #1e293b;
        --et-border: #334155;
        --et-text: #f1f5f9;
        --et-text-secondary: #94a3b8;
    }
    
    .et-fe-input,
    .et-fe-select,
    #et-fe-expense-form input,
    #et-fe-expense-form select,
    #et-fe-expense-form textarea {
        background: var(--et-card);
        color: var(--et-text);
    }
    
    .et-password-box {
        background: #1e293b;
    }
    
    .et-password-box h3 {
        color: #f1f5f9;
    }
    
    .et-password-box > p {
        color: #94a3b8;
    }
    
    .et-password-form input[type="password"] {
        background: #0f172a;
        border-color: #334155;
        color: #f1f5f9;
    }
    
    .et-login-required {
        background: #1e293b;
        color: #94a3b8;
    }
}