/* Import Inter font */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap');

/* CSS Variables */
:root {
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    
    --color-primary: #1b1e24;
    --color-primary-hover: #333333;
    --color-text: #1a1a1a;
    --color-text-light: #666666;
    --color-background: #fafafa;
    --color-surface: #ffffff;
    --color-border: #e0e0e0;
    --color-border-light: #f0f0f0;
    --color-error: #dc2626;
    --color-error-bg: #fef2f2;
    --color-error-border: #fecaca;
    --color-error-light: #fca5a5;
    
    --font-size-xs: 11px;
    --font-size-sm: 13px;
    --font-size-base: 14px;
    --font-size-lg: 16px;
    --font-size-xl: 18px;
    --font-size-2xl: 20px;
    --font-size-3xl: 24px;
    
    --icon-size-sm: 18px;
    --breakpoint-tablet: 768px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-background);
}

/* Utilities */
.hidden { display: none !important; }
.page { min-height: 100vh; }

/* Login Page */
#loginPage {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.login-container {
    width: 100%;
    max-width: 420px;
    padding: var(--spacing-lg);
    background-color: var(--color-primary);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.login-header {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    margin-left: calc(-1 * var(--spacing-lg));
    margin-right: calc(-1 * var(--spacing-lg));
    margin-top: calc(-1 * var(--spacing-lg));
    margin-bottom: var(--spacing-lg);
}

.login-header .portal-title {
    font-size: var(--font-size-3xl);
    font-weight: 600;
    color: var(--color-surface);
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.01em;
}

.login-header .company-name {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: rgba(255, 255, 255, 0.6);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Dashboard Layout */
#dashboardPage {
    display: flex;
    height: 100vh;
}

.sidebar {
    width: 280px;
    background-color: var(--color-primary);
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    margin-bottom: var(--spacing-md);
}

.portal-title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--color-surface);
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.01em;
}

.company-name {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: rgba(255, 255, 255, 0.6);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.sidebar-nav {
    flex: 1;
    padding: 0 var(--spacing-md);
}

.nav-item {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-weight: 400;
    font-size: var(--font-size-sm);
    margin-bottom: 2px;
    border-left: 2px solid transparent;
    transition: all 0.2s ease;
    position: relative;
    background-color: rgba(255, 255, 255, 0.03);
}

.nav-item:hover {
    background-color: rgba(255, 255, 255, 0.05);
    border-left-color: rgba(255, 255, 255, 0.3);
    color: rgba(255, 255, 255, 0.85);
}

.nav-item.active {
    background-color: rgba(255, 255, 255, 0.05);
    border-left-color: rgba(255, 255, 255, 0.9);
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
}

.sidebar-footer {
    padding: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.user-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.user-email {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    text-align: center;
    padding: var(--spacing-xs);
    background-color: rgba(255, 255, 255, 0.05);
}

.user-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.user-actions button {
    width: 100%;
    background: transparent;
    color: var(--color-surface);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all 0.2s ease;
}

.user-actions button:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-1px);
    will-change: transform;
}

.profile-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.profile-btn .profile-icon {
    width: var(--icon-size-sm);
    height: var(--icon-size-sm);
    stroke: currentColor;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: var(--spacing-md);
    overflow-y: auto;
}

.content-page {
    display: block;
}

.content-page.hidden {
    display: none;
}

.invoices-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.invoice-panel {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
}

.invoice-panel-header {
    padding: var(--spacing-sm);
    background-color: var(--color-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.invoice-number {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-surface);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.invoice-status {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: rgba(255, 255, 255, 0.8);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.invoice-panel-content {
    padding: var(--spacing-sm);
}

.invoice-line-items {
    margin-bottom: var(--spacing-sm);
}

.invoice-line-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.invoice-line-item:last-child {
    border-bottom: none;
    margin-bottom: var(--spacing-xs);
}

.item-description {
    font-size: var(--font-size-sm);
    color: var(--color-text);
    flex: 1;
}

.item-details {
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
    font-weight: 500;
    white-space: nowrap;
}

.invoice-summary {
    background-color: var(--color-background);
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border-light);
}

.invoice-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.total-label {
    font-size: var(--font-size-sm);
    color: var(--color-text);
}

.total-amount {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
    font-weight: 700;
}

.invoice-dates {
    display: flex;
    gap: var(--spacing-xs);
    justify-content: flex-end;
}

.invoice-date {
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
    background-color: var(--color-background);
    padding: 2px var(--spacing-xs);
    border: 1px solid var(--color-border-light);
    font-weight: 500;
    white-space: nowrap;
}

.invoice-issued {
    background-color: var(--color-background);
    color: var(--color-text-light);
    border: 1px solid var(--color-border-light);
}

.invoice-due {
    background-color: var(--color-background);
    color: var(--color-text-light);
    border: 1px solid var(--color-border-light);
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    font-size: var(--font-size-sm);
    color: var(--color-text);
}

#loginPage .form-group label {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    background-color: var(--color-surface);
    font-family: inherit;
    font-size: var(--font-size-base);
    color: var(--color-text);
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
}

#loginPage .form-group input {
    background-color: var(--color-surface);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--color-text);
    transition: all 0.2s ease;
}

#loginPage .form-group input:focus {
    background-color: var(--color-surface);
    border-color: rgba(255, 255, 255, 0.5);
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1);
}

#loginPage .form-group input::placeholder {
    color: var(--color-text-light);
}

/* Buttons */
button {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-primary);
    background-color: var(--color-primary);
    color: white;
    font-family: inherit;
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

button:hover {
    background-color: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
    will-change: transform;
}

button:disabled {
    background-color: var(--color-border);
    border-color: var(--color-border);
    color: var(--color-text-light);
    cursor: not-allowed;
}

#loginPage button {
    background-color: rgba(255, 255, 255, 0.05);
    color: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.2);
    width: 100%;
    font-weight: 500;
    transition: all 0.2s ease;
}

#loginPage button:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-1px);
    will-change: transform;
}

#loginPage button:disabled {
    background-color: rgba(255, 255, 255, 0.02);
    border-color: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.4);
    transform: none;
}


/* User Profile - Simple like Services */
.user-profile {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    max-width: none;
}

.profile-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.profile-row {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    line-height: 1.4;
}

.profile-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text);
    min-width: 80px;
    flex-shrink: 0;
}

.profile-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    flex: 1;
}


/* Error Messages */
.error {
    color: var(--color-error);
    background-color: var(--color-error-bg);
    border: 1px solid var(--color-error-border);
    padding: var(--spacing-sm);
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-base);
    display: none;
}

.error.show {
    display: block;
}

#loginPage .error {
    background-color: rgba(220, 38, 38, 0.1);
    border: 1px solid rgba(220, 38, 38, 0.3);
    color: var(--color-error-light);
}

/* Loading States */
.loading {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--color-text-light);
    font-style: italic;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    padding: var(--spacing-md);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

/* Empty States */
.empty-state {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--color-text-light);
}

.empty-state h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

/* Admin Styles */
.admin-nav {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-divider {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: rgba(255, 255, 255, 0.5);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--spacing-xs) var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
}

.admin-header h1 {
    font-size: var(--font-size-3xl);
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

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

/* Admin Tables - Using invoice-panel pattern */
.admin-table {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.admin-item {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
}

.admin-item-header {
    padding: var(--spacing-sm);
    background-color: var(--color-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-item-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-surface);
}

.admin-item-type {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: rgba(255, 255, 255, 0.8);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.admin-item-content {
    padding: var(--spacing-sm);
}

.admin-item-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.admin-item-row:last-child {
    border-bottom: none;
    margin-bottom: var(--spacing-xs);
}

.admin-item-label {
    font-size: var(--font-size-sm);
    color: var(--color-text);
    flex: 1;
}

.admin-item-value {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    font-weight: 500;
    white-space: nowrap;
}

.admin-item-actions {
    background-color: var(--color-background);
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border-light);
    display: flex;
    gap: var(--spacing-xs);
    justify-content: flex-end;
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
    padding: 4px var(--spacing-xs);
    font-size: var(--font-size-xs);
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-secondary:hover {
    background-color: var(--color-background);
    border-color: var(--color-text);
}

.btn-danger {
    background-color: var(--color-error);
    color: white;
    border: none;
    padding: 4px var(--spacing-xs);
    font-size: var(--font-size-xs);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.btn-danger:hover {
    background-color: #b91c1c;
}

/* Inline Editing Styles */
.admin-item.editing {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(27, 30, 36, 0.1);
}

.admin-item.editing .admin-item-header {
    background-color: var(--color-primary-hover);
}

.edit-field {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-text);
    width: 100%;
    font-family: inherit;
    min-height: 20px;
}

.edit-field:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(27, 30, 36, 0.1);
}

/* Edit mode specific styling */
.admin-item.editing .admin-item-content {
    min-height: auto;
}

.admin-item.editing .admin-item-row {
    margin-bottom: var(--spacing-xs);
}

.admin-item.editing .admin-item-row:last-child {
    margin-bottom: 0;
}

/* Hide labels in edit mode, show as placeholders instead */
.admin-item.editing .admin-item-label {
    display: none;
}

.admin-item.editing .admin-item-row {
    display: block;
}

/* Read-only field styling */
.edit-field-readonly {
    background-color: var(--color-background);
    border: 1px solid var(--color-border-light);
    padding: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    width: 100%;
    font-family: inherit;
    font-style: italic;
}

.edit-actions {
    background-color: var(--color-background);
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border-light);
    display: flex;
    gap: var(--spacing-xs);
    justify-content: flex-end;
}

.btn-save {
    background-color: #059669;
    color: white;
    border: none;
    padding: 4px var(--spacing-xs);
    font-size: var(--font-size-xs);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.btn-save:hover {
    background-color: #047857;
}

.btn-cancel {
    background-color: var(--color-text-light);
    color: white;
    border: none;
    padding: 4px var(--spacing-xs);
    font-size: var(--font-size-xs);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.btn-cancel:hover {
    background-color: var(--color-text);
}

/* Responsive Design */
@media (max-width: calc(var(--breakpoint-tablet) * 1px)) {
    #dashboardPage {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        border-bottom: 1px solid var(--color-border);
    }
    
    .main-content {
        padding: var(--spacing-md);
    }
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal.hidden {
    display: none;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
}

.modal-content {
    position: relative;
    background: white;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px 16px;
    border-bottom: 1px solid #e9ecef;
}

.modal-header h2 {
    margin: 0;
    color: #333;
    font-size: 1.25rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    color: #6c757d;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
}

.modal-close:hover {
    background: #f8f9fa;
    color: #333;
}

#modalFields {
    padding: 20px 24px;
}

.modal-field {
    margin-bottom: 16px;
}

.modal-field label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: #333;
    font-size: 0.9rem;
}

.modal-field input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.2s;
    box-sizing: border-box;
}

.modal-field input:focus {
    outline: none;
    border-color: #007bff;
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
}

.modal-field input.error {
    border-color: #dc3545;
}

.modal-field .field-error {
    color: #dc3545;
    font-size: 0.8rem;
    margin-top: 4px;
    display: none;
}

.modal-field .field-hint {
    color: #6c757d;
    font-size: 0.8rem;
    margin-top: 4px;
}

.modal-actions {
    padding: 16px 24px 20px;
    border-top: 1px solid #e9ecef;
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

/* Toast Notifications */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 12px 20px;
    color: white;
    border-radius: 4px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    font-size: 14px;
    max-width: 300px;
    word-wrap: break-word;
    animation: slideIn 0.3s ease-out;
}

.toast-info {
    background: #007bff;
}

.toast-success {
    background: #28a745;
}

.toast-error {
    background: #dc3545;
}

.toast-warning {
    background: #ffc107;
    color: #212529;
}

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

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

.toast.removing {
    animation: slideOut 0.3s ease-in;
}

@media (max-width: 768px) {
    .modal-content {
        width: 95%;
        margin: 10px;
    }
    
    .modal-actions {
        flex-direction: column;
    }
    
    .modal-actions button {
        width: 100%;
    }
    
    .toast {
        right: 10px;
        left: 10px;
        max-width: none;
    }
}