/**
 * WhatsApp Platform - Main Stylesheet
 * Modern, dark theme with WhatsApp branding
 */

/* ==================== CSS Variables ==================== */
:root {
    /* Colors */
    --color-primary: #25D366;
    --color-primary-dark: #128C7E;
    --color-primary-light: #34B76A;
    
    --color-bg-dark: #0a0f14;
    --color-bg-card: #111b21;
    --color-bg-elevated: #1f2c33;
    --color-bg-hover: #2a3942;
    
    --color-text-primary: #e9edef;
    --color-text-secondary: #8696a0;
    --color-text-muted: #667781;
    
    --color-border: #2a3942;
    --color-border-light: #374248;
    
    --color-success: #34B76A;
    --color-danger: #f15c6d;
    --color-warning: #f7b928;
    --color-info: #53bdeb;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #25D366 0%, #128C7E 100%);
    --gradient-dark: linear-gradient(180deg, #111b21 0%, #0a0f14 100%);
    --gradient-card: linear-gradient(145deg, #1f2c33 0%, #111b21 100%);
    
    /* 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 10px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(37, 211, 102, 0.3);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background: var(--color-bg-dark);
    min-height: 100vh;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-light);
}

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

/* ==================== Typography ==================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }

.text-muted { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.text-sm { font-size: var(--font-size-sm); }
.text-center { text-align: center; }

/* ==================== Layout ==================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-sm {
    max-width: 600px;
}

.main-content {
    padding: var(--spacing-xl) 0;
    min-height: calc(100vh - 64px);
}

.mt-4 { margin-top: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.inline { display: inline; }

/* ==================== Navbar ==================== */
.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    padding: 0 var(--spacing-xl);
    background: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    font-size: var(--font-size-lg);
    color: var(--color-text-primary);
}

.nav-logo {
    width: 32px;
    height: 32px;
    color: var(--color-primary);
}

.nav-menu {
    display: flex;
    gap: var(--spacing-xs);
}

.nav-link {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-weight: 500;
    transition: all var(--transition-fast);
}

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

.nav-link.active {
    color: var(--color-primary);
    background: rgba(37, 211, 102, 0.1);
}

.nav-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.user-name {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

/* ==================== Buttons ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
    box-shadow: var(--shadow-glow);
    transform: translateY(-1px);
}

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

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

.btn-danger:hover {
    background: #d94a5a;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--color-border-light);
    color: var(--color-text-primary);
}

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

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

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

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
}

.btn-block {
    width: 100%;
}

/* ==================== Cards ==================== */
.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

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

.card-header h2 {
    margin: 0;
    font-size: var(--font-size-lg);
}

.card-body {
    padding: var(--spacing-lg);
}

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

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

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--spacing-md);
    font-size: var(--font-size-base);
    font-family: inherit;
    color: var(--color-text-primary);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 211, 102, 0.1);
}

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

.form-help {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.form-actions {
    margin-top: var(--spacing-xl);
}

/* ==================== Alerts ==================== */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.alert-success {
    background: rgba(52, 183, 106, 0.1);
    border: 1px solid rgba(52, 183, 106, 0.3);
    color: var(--color-success);
}

.alert-error {
    background: rgba(241, 92, 109, 0.1);
    border: 1px solid rgba(241, 92, 109, 0.3);
    color: var(--color-danger);
}

/* ==================== Auth Pages ==================== */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--gradient-dark);
}

.auth-container {
    width: 100%;
    max-width: 420px;
    padding: var(--spacing-lg);
}

.auth-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
}

.auth-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.auth-logo {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-lg);
    color: var(--color-primary);
}

.auth-logo svg {
    width: 100%;
    height: 100%;
}

.auth-header h1 {
    margin-bottom: var(--spacing-xs);
}

.auth-header p {
    color: var(--color-text-muted);
}

.auth-form {
    margin-top: var(--spacing-xl);
}

.auth-footer {
    margin-top: var(--spacing-xl);
    text-align: center;
    color: var(--color-text-muted);
}

/* ==================== Page Header ==================== */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
}

.page-header h1 {
    margin-bottom: var(--spacing-xs);
}

.page-header p {
    color: var(--color-text-muted);
    margin: 0;
}

/* ==================== Stats Grid ==================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

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

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

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

.stat-icon-blue { background: rgba(83, 189, 235, 0.15); color: var(--color-info); }
.stat-icon-green { background: rgba(52, 183, 106, 0.15); color: var(--color-success); }
.stat-icon-purple { background: rgba(168, 85, 247, 0.15); color: #a855f7; }
.stat-icon-orange { background: rgba(247, 185, 40, 0.15); color: var(--color-warning); }

.stat-content {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
}

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

/* ==================== Dashboard Grid ==================== */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

/* ==================== Quick Actions ==================== */
.quick-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.quick-action {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.quick-action:hover {
    background: var(--color-bg-hover);
    color: var(--color-primary);
}

.quick-action svg {
    width: 20px;
    height: 20px;
    color: var(--color-primary);
}

/* ==================== Device List & Cards ==================== */
.device-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.device-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-md);
}

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

.device-name {
    font-weight: 500;
}

.device-status {
    font-size: var(--font-size-xs);
    padding: 2px 8px;
    border-radius: var(--radius-full);
}

.devices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.device-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

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

.device-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    background: var(--color-bg-elevated);
}

.device-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(37, 211, 102, 0.15);
    border-radius: var(--radius-md);
    color: var(--color-primary);
}

.device-icon svg {
    width: 20px;
    height: 20px;
}

.device-card-body {
    padding: var(--spacing-lg);
}

.device-card-body h3 {
    margin-bottom: var(--spacing-sm);
}

.device-phone {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-primary);
}

.device-card-footer {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

/* ==================== Status Badges ==================== */
.status-badge,
.device-status-badge {
    display: inline-block;
    padding: 2px 10px;
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: var(--radius-full);
    text-transform: capitalize;
}

.status-pending, .status-badge.status-pending { 
    background: rgba(247, 185, 40, 0.15); 
    color: var(--color-warning); 
}

.status-connected, .status-badge.status-connected { 
    background: rgba(52, 183, 106, 0.15); 
    color: var(--color-success); 
}

.status-disconnected, .status-badge.status-disconnected { 
    background: rgba(134, 150, 160, 0.15); 
    color: var(--color-text-muted); 
}

.status-sent, .status-badge.status-sent { 
    background: rgba(83, 189, 235, 0.15); 
    color: var(--color-info); 
}

.status-delivered, .status-badge.status-delivered { 
    background: rgba(52, 183, 106, 0.15); 
    color: var(--color-success); 
}

.status-read, .status-badge.status-read { 
    background: rgba(83, 189, 235, 0.15); 
    color: var(--color-info); 
}

.status-failed, .status-badge.status-failed { 
    background: rgba(241, 92, 109, 0.15); 
    color: var(--color-danger); 
}

/* ==================== Tables ==================== */
.table-responsive {
    overflow-x: auto;
}

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

.table th, table th {
    text-align: left;
    padding: var(--spacing-md);
    font-weight: 500;
    color: var(--color-text-muted);
    border-bottom: 1px solid var(--color-border);
    font-size: var(--font-size-sm);
}

.table td, table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.table tbody tr:hover, table tbody tr:hover {
    background: var(--color-bg-hover);
}

.message-preview, .message-cell {
    max-width: 300px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

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

.empty-state-large {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    text-align: center;
    color: var(--color-text-muted);
    min-height: 400px;
}

.empty-state-large svg {
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-muted);
    opacity: 0.5;
}

.empty-state-large h3 {
    color: var(--color-text-primary);
}

/* ==================== Modal ==================== */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    width: 100%;
    max-width: 480px;
    margin: var(--spacing-lg);
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.modal-header h2 {
    margin: 0;
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

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

.modal-body {
    padding: var(--spacing-lg);
}

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

/* ==================== QR Scan Page ==================== */
.scan-page {
    max-width: 500px;
    margin: 0 auto;
}

.qr-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    background: var(--color-bg-elevated);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
}

.qr-loading {
    text-align: center;
    color: var(--color-text-muted);
}

.qr-image {
    max-width: 256px;
    border-radius: var(--radius-md);
}

.qr-success, .qr-error {
    text-align: center;
    padding: var(--spacing-xl);
}

.qr-success svg {
    color: var(--color-success);
    margin-bottom: var(--spacing-md);
}

.qr-success h3 {
    color: var(--color-success);
}

.scan-instructions {
    padding: var(--spacing-lg);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.scan-instructions h4 {
    margin-bottom: var(--spacing-md);
}

.scan-instructions ol {
    list-style-position: inside;
    color: var(--color-text-secondary);
}

.scan-instructions li {
    margin-bottom: var(--spacing-sm);
}

.device-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    color: var(--color-text-muted);
}

.status-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-indicator.status-pending {
    background: var(--color-warning);
}

.status-indicator.status-connected {
    background: var(--color-success);
    animation: none;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ==================== API Examples ==================== */
.api-examples {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.api-example h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-secondary);
}

.api-example pre {
    background: var(--color-bg-dark);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    overflow-x: auto;
    font-size: var(--font-size-sm);
}

.api-example code {
    color: var(--color-primary);
}

.token-alert {
    padding: var(--spacing-lg);
}

.token-display {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg-dark);
    border-radius: var(--radius-md);
}

.token-display code {
    flex: 1;
    font-size: var(--font-size-sm);
    word-break: break-all;
    color: var(--color-primary);
}

/* ==================== Spinner ==================== */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto var(--spacing-md);
}

.spinner-small {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ==================== Pagination ==================== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.page-info {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* ==================== Badge ==================== */
.badge {
    display: inline-block;
    padding: 2px 8px;
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: var(--radius-sm);
}

.badge-primary {
    background: rgba(37, 211, 102, 0.15);
    color: var(--color-primary);
}

.badge-secondary {
    background: var(--color-bg-elevated);
    color: var(--color-text-secondary);
}

/* ==================== Dropdown ==================== */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 180px;
    margin-top: var(--spacing-xs);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: 50;
}

.dropdown:hover .dropdown-menu,
.dropdown:focus-within .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text-primary);
    transition: background var(--transition-fast);
}

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

/* ==================== Responsive ==================== */
@media (max-width: 768px) {
    .navbar {
        flex-wrap: wrap;
        height: auto;
        padding: var(--spacing-md);
    }

    .nav-menu {
        order: 3;
        width: 100%;
        margin-top: var(--spacing-md);
        padding-top: var(--spacing-md);
        border-top: 1px solid var(--color-border);
        justify-content: center;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }

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

    .devices-grid {
        grid-template-columns: 1fr;
    }
}