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

:root {
    --bg-primary: #ffffff;
    --bg-secondary: #fafafa;
    --bg-tertiary: #f8f8f8;
    --bg-section-alt: #f5f5f5;
    --text-primary: #1a1a1a;
    --text-secondary: #2d2d2d;
    --text-muted: #666666;
    --border-color: #e5e5e5;
    --border-hover: #d5d5d5;
    --accent-subtle: #e8e8e8;
}

html {
    scroll-behavior: smooth;
    background-color: var(--bg-primary);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

/* Dashboard Container */
.dashboard-container {
    max-width: 1400px;
    margin: 0 auto;
    background: var(--bg-primary);
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

/* Header */
.dashboard-header {
    background: var(--bg-primary);
    color: var(--text-primary);
    padding: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    border-bottom: 1px solid var(--border-color);
}

.dashboard-header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    font-size: 0.875rem;
}

.user-name {
    font-weight: 500;
    color: var(--text-primary);
}

.user-role {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 600;
    border: 1px solid var(--border-color);
}

.logout-btn {
    padding: 8px 16px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease-out;
    font-family: inherit;
}

.logout-btn:hover {
    background: var(--accent-subtle);
    transform: scale(1.03);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* Navigation Tabs */
.nav-tabs {
    display: flex;
    gap: 10px;
    padding: 20px 30px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.nav-tab {
    padding: 12px 24px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s ease-out;
    font-family: inherit;
    font-size: 0.9375rem;
}

.nav-tab:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
    transform: scale(1.03);
}

.nav-tab.active {
    background: var(--text-primary);
    color: var(--bg-primary);
    border-color: var(--text-primary);
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9375rem;
    font-weight: 500;
    transition: all 0.2s ease-out;
    font-family: inherit;
    text-transform: none;
    letter-spacing: normal;
}

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

.btn-primary:hover {
    background: var(--text-secondary);
    transform: scale(1.03);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-primary:active {
    transform: scale(0.98);
}

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

.btn-secondary:hover {
    background: var(--accent-subtle);
    transform: scale(1.03);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.btn-danger {
    background: #dc2626;
    color: white;
}

.btn-danger:hover {
    background: #b91c1c;
    transform: scale(1.03);
}

.btn-edit {
    background: var(--text-primary);
    color: var(--bg-primary);
    padding: 6px 12px;
    font-size: 0.75rem;
    margin-right: 5px;
}

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

.btn-delete {
    background: #dc2626;
    color: white;
    padding: 6px 12px;
    font-size: 0.75rem;
}

.btn-delete:hover {
    background: #b91c1c;
}

/* Statistics Cards */
.stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    padding: 30px;
    background: var(--bg-secondary);
}

.stat-card {
    background: var(--bg-primary);
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all 0.2s ease-out;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
}

/* Filters */
.filters-container {
    padding: 25px 30px;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
}

.search-box {
    margin-bottom: 20px;
}

.search-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9375rem;
    transition: border-color 0.2s ease-out;
    font-family: inherit;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.search-input:focus {
    outline: none;
    border-color: var(--text-primary);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.05);
}

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

.filter-group {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    align-items: center;
}

.filter-select,
.filter-date {
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9375rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    cursor: pointer;
    transition: border-color 0.2s ease-out;
    font-family: inherit;
}

.filter-select:focus,
.filter-date:focus {
    outline: none;
    border-color: var(--text-primary);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.05);
}

.filter-date {
    cursor: text;
}

/* Table */
.table-container {
    padding: 30px;
    overflow-x: auto;
    background: var(--bg-primary);
}

.appointments-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-primary);
}

.appointments-table thead {
    background: var(--bg-secondary);
}

.appointments-table th {
    padding: 15px;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
}

.appointments-table th.sortable {
    cursor: pointer;
    user-select: none;
    position: relative;
    padding-right: 25px;
}

.appointments-table th.sortable:hover {
    background: var(--bg-tertiary);
}

.appointments-table th.sortable::after {
    content: ' ↕';
    position: absolute;
    right: 8px;
    opacity: 0.5;
}

.appointments-table th.sortable.sort-asc::after {
    content: ' ↑';
    opacity: 1;
    color: var(--text-primary);
}

.appointments-table th.sortable.sort-desc::after {
    content: ' ↓';
    opacity: 1;
    color: var(--text-primary);
}

.appointments-table tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.2s ease-out;
}

.appointments-table tbody tr:hover {
    background: var(--bg-secondary);
}

.appointments-table tbody tr:nth-child(even) {
    background: var(--bg-secondary);
}

.appointments-table tbody tr:nth-child(even):hover {
    background: var(--bg-tertiary);
}

.appointments-table td {
    padding: 15px;
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.appointments-table td.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
    font-style: italic;
}

.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
}

.status-confirmed {
    background: #d1fae5;
    color: #065f46;
}

.status-pending {
    background: #fef3c7;
    color: #92400e;
}

.status-cancelled {
    background: #fee2e2;
    color: #991b1b;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.modal-content {
    background: var(--bg-primary);
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease;
}

.modal-small {
    max-width: 400px;
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    padding: 25px 30px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    margin: 0;
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 600;
}

.close {
    font-size: 28px;
    font-weight: bold;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.2s ease-out;
    background: none;
    border: none;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 25px 30px;
}

.modal-form {
    padding: 25px 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.9375rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9375rem;
    transition: border-color 0.2s ease-out;
    font-family: inherit;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--text-primary);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.05);
}

.form-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.delete-warning {
    color: #dc2626;
    font-weight: 500;
    margin-top: 10px;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .dashboard-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .dashboard-header h1 {
        font-size: 1.5rem;
    }

    .stats-container {
        grid-template-columns: repeat(2, 1fr);
        padding: 20px;
    }

    .stat-value {
        font-size: 2rem;
    }

    .filter-group {
        flex-direction: column;
    }

    .filter-select,
    .filter-date {
        width: 100%;
    }

    .table-container {
        padding: 15px;
    }

    .appointments-table {
        font-size: 0.875rem;
    }

    .appointments-table th,
    .appointments-table td {
        padding: 10px 8px;
    }

    .modal-content {
        width: 95%;
        margin: 20px;
    }
}

@media (max-width: 480px) {
    .stats-container {
        grid-template-columns: 1fr;
    }

    .appointments-table th,
    .appointments-table td {
        padding: 8px 5px;
        font-size: 0.8125rem;
    }

    .btn-edit,
    .btn-delete {
        padding: 4px 8px;
        font-size: 0.6875rem;
    }
}

/* Toast Notifications */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    padding: 14px 24px;
    background: var(--text-primary);
    border-radius: 8px;
    color: var(--bg-primary);
    font-weight: 500;
    font-size: 0.875rem;
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 9999;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast-success {
    background: #10b981;
    color: white;
}

.toast-error {
    background: #dc2626;
    color: white;
}

.toast-info {
    background: var(--text-primary);
    color: var(--bg-primary);
}

.toast-warning {
    background: #f59e0b;
    color: white;
}

/* Client Cards (Admin Dashboard) */
.clients-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 20px;
    padding: 24px;
    background: var(--bg-secondary);
}

.client-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    transition: all 0.2s ease-out;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.client-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.client-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.client-name {
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0 0 4px 0;
}

.client-email {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.client-status {
    padding: 4px 10px;
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.client-status.active {
    background: #d1fae5;
    color: #065f46;
}

.client-status.inactive {
    background: #fee2e2;
    color: #991b1b;
}

.client-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.client-stat {
    text-align: center;
}

.client-stat-value {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 700;
}

.client-stat-label {
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
}

.client-actions {
    display: flex;
    gap: 8px;
    margin-top: 16px;
}

.client-calendar-status {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 12px;
    font-size: 0.875rem;
}

.calendar-connected {
    color: #10b981;
}

.calendar-disconnected {
    color: var(--text-muted);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.75rem;
}

.loading-spinner {
    display: flex;
    justify-content: center;
    padding: 48px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--text-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-primary);
}

.section-title {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
}

.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

/* Login Page Styles */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    position: relative;
    z-index: 1;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 48px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.login-logo {
    text-align: center;
    margin-bottom: 32px;
}

.login-logo-icon {
    width: 64px;
    height: 64px;
    background: var(--text-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 28px;
    color: var(--bg-primary);
}

.login-logo h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
}

.login-logo p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 8px;
}

.login-divider {
    display: flex;
    align-items: center;
    margin: 24px 0;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.login-divider::before,
.login-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

.login-divider span {
    padding: 0 16px;
}

.login-toggle {
    text-align: center;
    margin-top: 24px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.login-toggle a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease-out;
}

.login-toggle a:hover {
    color: var(--text-secondary);
}

.login-error,
.login-success {
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 0.875rem;
    margin-bottom: 20px;
    display: none;
}

.login-error.show {
    display: block;
    background: #fee2e2;
    border: 1px solid #fecaca;
    color: #991b1b;
}

.login-success.show {
    display: block;
    background: #d1fae5;
    border: 1px solid #a7f3d0;
    color: #065f46;
}

.login-loading {
    pointer-events: none;
    opacity: 0.7;
}

.login-loading .btn-primary::after {
    content: '';
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-left: 8px;
    display: inline-block;
}

.btn-google {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-google:hover {
    background: var(--accent-subtle);
    border-color: var(--border-hover);
}

.btn-google svg {
    width: 20px;
    height: 20px;
}