/* CSS Variables */
:root {
    --primary-color: #1f2937;
    --primary-hover: #374151;
    --secondary-color: #6b7280;
    --accent-color: #3b82f6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --background-color: #ffffff;
    --surface-color: #f9fafb;
    --border-color: #e5e7eb;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
}

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

body {
    font-family: 'Cal Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* PWA Styles */
@media (display-mode: standalone) {
    body {
        padding-top: env(safe-area-inset-top);
        padding-bottom: env(safe-area-inset-bottom);
    }
}

/* App Container */
#app {
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Screen Management */
.screen {
    display: none;
    height: 100vh;
    flex-direction: column;
}

.screen.active {
    display: flex;
}

/* Login Screen */
#loginScreen {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.login-container {
    background: var(--background-color);
    border-radius: var(--radius-lg);
    padding: 3rem;
    box-shadow: var(--shadow-lg);
    max-width: 400px;
    width: 100%;
    text-align: center;
}

.login-header {
    margin-bottom: 2rem;
}

.login-header i {
    font-size: 3rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.login-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.form-group {
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.875rem;
}

.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all 0.2s ease;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover {
    background-color: #2563eb;
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background-color: #f3f4f6;
}

.btn-ghost {
    background-color: transparent;
    color: var(--text-secondary);
}

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

.btn-demo {
    width: 100%;
    margin-bottom: 0.5rem;
    background-color: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-demo:hover {
    background-color: #f3f4f6;
}

.demo-accounts {
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
}

.demo-accounts h3 {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

/* Header */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    background: var(--background-color);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.header-left i {
    font-size: 1.5rem;
    color: var(--accent-color);
}

.header-left h1 {
    font-size: 1.25rem;
    font-weight: 700;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

#userWelcome {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Bottom Navigation */
.bottom-nav {
    display: flex;
    background: var(--background-color);
    border-top: 1px solid var(--border-color);
    padding: 0.5rem;
    gap: 0.25rem;
    order: 3;
}

.nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.75rem 0.5rem;
    background: none;
    border: none;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    color: var(--text-secondary);
}

.nav-item:hover {
    background-color: var(--surface-color);
}

.nav-item.active {
    color: var(--accent-color);
    background-color: rgb(59 130 246 / 0.1);
}

.nav-item i {
    font-size: 1.25rem;
}

.nav-item span {
    font-size: 0.75rem;
    font-weight: 600;
}

/* Main Content */
.app-content {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    order: 2;
}

.tab-content {
    display: none;
    height: 100%;
}

.tab-content.active {
    display: block;
}

/* Messages Tab */
.messages-header, .contacts-header, .compose-header, .users-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.messages-header h2, .contacts-header h2, .compose-header h2, .users-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
}

.search-bar {
    display: flex;
    align-items: center;
    position: relative;
    max-width: 300px;
}

.search-bar i {
    position: absolute;
    left: 0.75rem;
    color: var(--text-secondary);
}

.search-bar input {
    padding-left: 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.5rem 0.75rem 0.5rem 2.5rem;
    width: 100%;
}

/* Message Threads */
.message-threads {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.message-thread {
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.message-thread:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--accent-color);
}

.thread-header {
    display: flex;
    justify-content: between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.thread-subject {
    font-weight: 600;
    font-size: 1rem;
}

.thread-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.thread-preview {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.unread-badge {
    background: var(--accent-color);
    color: white;
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 1rem;
    font-weight: 600;
}

/* Contact Groups */
.contact-groups {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

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

.contact-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
}

.contact-card {
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1rem;
    transition: all 0.2s ease;
}

.contact-card:hover {
    box-shadow: var(--shadow-md);
}

.contact-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

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

.contact-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.btn-small {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}

/* Compose Form */
.compose-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 800px;
}

.recipient-selector {
    margin-bottom: 1rem;
}

.custom-recipients {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--surface-color);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.recipient-checkboxes {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.75rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    transition: background-color 0.2s ease;
}

.checkbox-label:hover {
    background-color: var(--background-color);
}

.checkbox-label input[type="checkbox"] {
    margin: 0;
}

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

/* Users List */
.users-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.user-card {
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.user-info {
    flex: 1;
}

.user-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.user-details {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.role-badge {
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.role-badge.admin {
    background: rgb(239 68 68 / 0.1);
    color: var(--error-color);
}

.role-badge.sacristan {
    background: rgb(59 130 246 / 0.1);
    color: var(--accent-color);
}

.role-badge.viewer {
    background: rgb(107 114 128 / 0.1);
    color: var(--secondary-color);
}

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

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--background-color);
    border-radius: var(--radius-lg);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

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

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0.25rem;
    border-radius: var(--radius-sm);
}

.modal-close:hover {
    background-color: var(--surface-color);
}

.modal form {
    padding: 1.5rem;
}

.modal .form-group {
    margin-bottom: 1.5rem;
}

.permissions-group {
    margin-bottom: 1.5rem;
}

.permissions-group label {
    display: block;
    margin-bottom: 1rem;
    font-weight: 600;
}

.permission-checkboxes {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

/* Message Conversation */
.message-conversation {
    max-height: 400px;
    overflow-y: auto;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.conversation-message {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #f3f4f6;
}

.conversation-message:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.message-sender {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.875rem;
}

.sender-role {
    background: var(--surface-color);
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.message-content {
    color: var(--text-primary);
    line-height: 1.6;
    margin-bottom: 0.5rem;
}

.message-time {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.message-reply {
    padding: 1.5rem;
}

.message-reply form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Loading Overlay */
.loading-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.loading-overlay.active {
    display: flex;
}

.spinner {
    width: 3rem;
    height: 3rem;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-overlay p {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-secondary);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 3000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1rem;
    box-shadow: var(--shadow-lg);
    min-width: 300px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transform: translateX(100%);
    animation: slideIn 0.3s ease forwards;
}

.toast.success {
    border-color: var(--success-color);
    background: rgb(16 185 129 / 0.05);
}

.toast.error {
    border-color: var(--error-color);
    background: rgb(239 68 68 / 0.05);
}

.toast.warning {
    border-color: var(--warning-color);
    background: rgb(245 158 11 / 0.05);
}

.toast-icon {
    font-size: 1.25rem;
}

.toast.success .toast-icon {
    color: var(--success-color);
}

.toast.error .toast-icon {
    color: var(--error-color);
}

.toast.warning .toast-icon {
    color: var(--warning-color);
}

.toast-message {
    flex: 1;
    font-weight: 600;
    font-size: 0.875rem;
}

@keyframes slideIn {
    to {
        transform: translateX(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-content {
        padding: 1rem;
    }
    
    .login-container {
        padding: 2rem;
        margin: 1rem;
    }
    
    .contact-list {
        grid-template-columns: 1fr;
    }
    
    .recipient-checkboxes {
        grid-template-columns: 1fr;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .user-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .user-actions {
        align-self: stretch;
        justify-content: flex-end;
    }
    
    .toast-container {
        left: 1rem;
        right: 1rem;
    }
    
    .toast {
        min-width: auto;
    }
}

/* Dark mode support (system preference) */
@media (prefers-color-scheme: dark) {
    :root {
        --primary-color: #1f2937;
        --primary-hover: #374151;
        --secondary-color: #9ca3af;
        --accent-color: #60a5fa;
        --success-color: #34d399;
        --warning-color: #fbbf24;
        --error-color: #f87171;
        --background-color: #111827;
        --surface-color: #1f2937;
        --border-color: #374151;
        --text-primary: #f9fafb;
        --text-secondary: #9ca3af;
    }
}