/* ============================================
   WhatsApp API - Admin Panel Styles
   Modern Dark Theme with Green Accents
   ============================================ */

:root {
    /* Colors - Dark theme inspired by terminal/IDE */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-hover: #30363d;
    
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    
    --accent-primary: #25D366;
    --accent-secondary: #128C7E;
    --accent-hover: #34e876;
    --accent-glow: rgba(37, 211, 102, 0.3);
    
    --border-color: #30363d;
    --border-subtle: #21262d;
    
    --success: #3fb950;
    --warning: #d29922;
    --error: #f85149;
    --info: #58a6ff;
    
    /* Spacing */
    --sidebar-width: 260px;
    --header-height: 70px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    
    /* Typography - System fonts for better compatibility */
    --font-main: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', 'Monaco', 'Courier New', monospace;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px var(--accent-glow);
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
}

body {
    font-family: var(--font-main);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow: hidden;
}

/* ============================================
   Layout
   ============================================ */

.app {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-glow);
}

.logo-icon svg {
    width: 20px;
    height: 20px;
    color: white;
}

.logo span {
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.02em;
}

/* Navigation */
.nav {
    flex: 1;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

.nav-item svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.nav-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.nav-item.active {
    background: linear-gradient(135deg, rgba(37, 211, 102, 0.15), rgba(18, 140, 126, 0.1));
    color: var(--accent-primary);
    border: 1px solid rgba(37, 211, 102, 0.3);
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
}

.api-status {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--error);
    box-shadow: 0 0 8px var(--error);
}

.status-dot.connected {
    background: var(--success);
    box-shadow: 0 0 8px var(--success);
}

/* Main Content */
.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg-primary);
}

/* Header */
.header {
    height: var(--header-height);
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
    flex-shrink: 0;
}

.header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

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

.search-box {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 10px 16px;
    width: 280px;
    transition: all 0.2s ease;
}

.search-box:focus-within {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-box svg {
    width: 18px;
    height: 18px;
    color: var(--text-muted);
}

.search-box input {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    outline: none;
}

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

/* Content Area */
.content {
    flex: 1;
    padding: 32px;
    overflow-y: auto;
}

/* ============================================
   Components
   ============================================ */

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    text-decoration: none;
}

.btn svg {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    box-shadow: var(--shadow-sm), 0 0 20px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), 0 0 30px var(--accent-glow);
}

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

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

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

.btn-danger:hover {
    background: #ff6b63;
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.btn-icon svg {
    width: 18px;
    height: 18px;
}

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

.btn-sm {
    padding: 6px 12px;
    font-size: 0.8rem;
}

/* Cards */
.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: all 0.2s ease;
}

.card:hover {
    border-color: var(--border-subtle);
    box-shadow: var(--shadow-md);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon svg {
    width: 24px;
    height: 24px;
}

.stat-icon.green {
    background: rgba(37, 211, 102, 0.15);
    color: var(--accent-primary);
}

.stat-icon.blue {
    background: rgba(88, 166, 255, 0.15);
    color: var(--info);
}

.stat-icon.yellow {
    background: rgba(210, 153, 34, 0.15);
    color: var(--warning);
}

.stat-icon.red {
    background: rgba(248, 81, 73, 0.15);
    color: var(--error);
}

.stat-content {
    flex: 1;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 4px;
    font-family: var(--font-mono);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Tables */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 14px 20px;
    text-align: left;
}

th {
    background: var(--bg-tertiary);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

td {
    border-bottom: 1px solid var(--border-subtle);
    font-size: 0.95rem;
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background: var(--bg-hover);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.badge-success {
    background: rgba(63, 185, 80, 0.15);
    color: var(--success);
}

.badge-warning {
    background: rgba(210, 153, 34, 0.15);
    color: var(--warning);
}

.badge-error {
    background: rgba(248, 81, 73, 0.15);
    color: var(--error);
}

.badge-info {
    background: rgba(88, 166, 255, 0.15);
    color: var(--info);
}

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

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

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

textarea.form-input {
    min-height: 120px;
    resize: vertical;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow: hidden;
    transform: scale(0.9) translateY(20px);
    transition: all 0.3s ease;
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

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

.modal-header h3 {
    font-size: 1.2rem;
    font-weight: 600;
}

.modal-body {
    padding: 24px;
    overflow-y: auto;
    max-height: calc(90vh - 70px);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
}

/* QR Modal */
.qr-modal {
    max-width: 400px;
}

.qr-body {
    text-align: center;
}

.qr-container {
    background: white;
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 20px;
    min-height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.qr-container img {
    max-width: 100%;
    height: auto;
}

.qr-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    color: var(--bg-primary);
}

.qr-instructions {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Toast */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    min-width: 300px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
}

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

.toast-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

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

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

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

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    margin-bottom: 2px;
}

.toast-message {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

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

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

/* Instance Card */
.instance-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}

.instance-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: all 0.2s ease;
}

.instance-card:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 0 20px var(--accent-glow);
}

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

.instance-name {
    font-weight: 600;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.instance-status {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.instance-status.connected {
    background: var(--success);
    box-shadow: 0 0 8px var(--success);
}

.instance-status.pending {
    background: var(--warning);
    box-shadow: 0 0 8px var(--warning);
}

.instance-status.disconnected {
    background: var(--error);
    box-shadow: 0 0 8px var(--error);
}

.instance-info {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

.instance-info-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
}

.instance-info-label {
    color: var(--text-secondary);
}

.instance-info-value {
    font-family: var(--font-mono);
    color: var(--text-primary);
}

.instance-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

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

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.empty-state p {
    margin-bottom: 24px;
}

/* Section Title */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.section-title {
    font-size: 1.3rem;
    font-weight: 600;
}

/* Message Input */
.message-composer {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.message-composer-header {
    margin-bottom: 20px;
}

.message-composer-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.message-composer-subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    background: var(--bg-tertiary);
    padding: 4px;
    border-radius: var(--radius-md);
}

.tab {
    flex: 1;
    padding: 10px 16px;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-family: inherit;
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.tab.active {
    background: var(--bg-secondary);
    color: var(--accent-primary);
}

/* Chat List */
.chat-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.chat-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
}

.chat-item:hover {
    background: var(--bg-hover);
}

.chat-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-weight: 600;
    color: var(--accent-primary);
}

.chat-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.chat-content {
    flex: 1;
    min-width: 0;
}

.chat-name {
    font-weight: 500;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-preview {
    font-size: 0.9rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-meta {
    text-align: right;
    flex-shrink: 0;
}

.chat-time {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.chat-unread {
    background: var(--accent-primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 10px;
    display: inline-block;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: -100%;
        top: 0;
        height: 100%;
        z-index: 100;
        transition: left 0.3s ease;
    }
    
    .sidebar.open {
        left: 0;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .header {
        padding: 0 16px;
    }
    
    .content {
        padding: 16px;
    }
    
    .search-box {
        display: none;
    }
}