/* public/css/style.css */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --primary: #25D366; /* WhatsApp Green */
    --primary-dark: #128C7E;
    --primary-light: #dcf8c6;
    
    --bg-color: #0f172a; /* Slate 900 */
    --surface-color: #1e293b; /* Slate 800 */
    --surface-hover: #334155; /* Slate 700 */
    
    --text-primary: #f8fafc; /* Slate 50 */
    --text-secondary: #94a3b8; /* Slate 400 */
    
    --danger: #ef4444;
    --border-color: #334155;
    
    --border-radius: 12px;
    --transition: 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* --- Login Page --- */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: radial-gradient(circle at center, #1e293b 0%, #0f172a 100%);
}

.login-card {
    background: var(--surface-color);
    padding: 2.5rem;
    border-radius: 16px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-color);
    text-align: center;
}

.login-card h2 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.login-card p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 0.9rem;
}

.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.form-group input {
    width: 100%;
    padding: 0.8rem 1rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    outline: none;
    transition: var(--transition);
}

.form-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 211, 102, 0.2);
}

.btn {
    width: 100%;
    padding: 0.8rem 1rem;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

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

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    padding: 0.75rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.85rem;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

/* --- App Layout --- */
.app-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 250px;
    background: var(--surface-color);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 2.5rem;
    color: var(--primary);
    padding: 0 10px;
}

.nav-menu {
    list-style: none;
    flex: 1;
}

.nav-item {
    margin-bottom: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition);
    font-weight: 500;
}

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

.nav-link.active {
    border-left: 3px solid var(--primary);
}

.main-content {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.header h1 {
    font-size: 1.75rem;
    font-weight: 700;
}

/* --- Cards --- */
.card {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

/* --- WhatsApp Connection Status --- */
.connection-status {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 1rem;
    border-radius: 8px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
}

.status-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text-secondary); /* default offline */
}

.status-indicator.online {
    background: var(--primary);
    box-shadow: 0 0 10px var(--primary);
}

.status-indicator.offline {
    background: var(--danger);
    box-shadow: 0 0 10px var(--danger);
}

#qrcode-container {
    text-align: center;
    margin-top: 1rem;
    padding: 1rem;
    background: white;
    border-radius: 8px;
    display: inline-block;
}

/* --- Badge --- */
.badge {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success {
    background: rgba(37, 211, 102, 0.2);
    color: var(--primary);
}

/* Mobile Responsiveness & Truncation */
.truncate {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 150px;
    display: inline-block;
    vertical-align: middle;
    cursor: pointer;
}

@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        height: auto;
        padding: 1rem;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    .sidebar-logo {
        margin-bottom: 1rem;
    }
    .nav-menu {
        display: flex;
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        gap: 8px;
        width: 100%;
        margin-bottom: 1rem;
    }
    .nav-item {
        margin-bottom: 0;
    }
    .nav-link {
        padding: 0.5rem 0.8rem;
        font-size: 0.85rem;
    }
    .sidebar > div {
        margin-top: 0 !important;
        width: 100%;
        display: flex;
        justify-content: center;
    }
    .main-content {
        padding: 1rem;
    }
    .stat-grid {
        grid-template-columns: 1fr;
    }
    .contact-grid {
        grid-template-columns: 1fr;
    }
    div[style*="grid-template-columns: 2fr 1fr"] {
        grid-template-columns: 1fr !important;
    }
    table {
        min-width: 600px;
    }
}