/* ========================================
   CONNECTHUB PRO - VARIABLES & RESET
   ======================================== */

:root {
    /* WhatsApp Colors */
    --whatsapp-green: #25D366;
    --whatsapp-dark-green: #075E54;
    --whatsapp-light-green: #D9FDD3;
    --whatsapp-teal: #128C7E;
    
    /* Grays */
    --bg-primary: #F0F2F5;
    --bg-secondary: #FFFFFF;
    --bg-chat: #E9EDEF;
    --bg-sidebar: #FFFFFF;
    --border-color: #E0E0E0;
    
    /* Text Colors */
    --text-primary: #111B21;
    --text-secondary: #667781;
    --text-muted: #8696A0;
    
    /* Status Colors */
    --status-online: #00D856;
    --status-offline: #E0E0E0;
    --status-away: #FFC107;
    
    /* Alert Colors */
    --color-success: #00A884;
    --color-danger: #E53935;
    --color-warning: #FF9800;
    --color-info: #2196F3;
    
    /* KPI Colors */
    --color-blue: #2196F3;
    --color-green: #4CAF50;
    --color-orange: #FF9800;
    --color-purple: #9C27B0;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.15);
    
    /* Transitions */
    --transition: all 0.3s ease;
    
    /* Font */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   LOGIN PAGE
   ======================================== */

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--whatsapp-dark-green) 0%, var(--whatsapp-teal) 100%);
    padding: 20px;
}

.login-container {
    display: flex;
    max-width: 1000px;
    width: 100%;
    background: white;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.login-box {
    flex: 1;
    padding: 60px 50px;
}

.login-header {
    text-align: center;
    margin-bottom: 40px;
}

.login-header .logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 10px;
}

.login-header .logo i {
    font-size: 48px;
    color: var(--whatsapp-green);
}

.login-header h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.login-header .subtitle {
    color: var(--text-secondary);
    font-size: 16px;
}

.login-form {
    max-width: 400px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 14px;
}

.form-group label i {
    color: var(--whatsapp-green);
    margin-right: 5px;
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 15px;
    transition: var(--transition);
    font-family: var(--font-family);
}

.form-group input:focus {
    outline: none;
    border-color: var(--whatsapp-green);
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    font-size: 14px;
}

.remember-me {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.remember-me input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.forgot-password {
    color: var(--whatsapp-green);
    text-decoration: none;
    font-weight: 500;
}

.forgot-password:hover {
    text-decoration: underline;
}

.btn-login {
    width: 100%;
    padding: 16px;
    background: var(--whatsapp-green);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-login:hover {
    background: var(--whatsapp-teal);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.demo-credentials {
    margin-top: 20px;
    padding: 15px;
    background: #F0F9FF;
    border-radius: 8px;
    text-align: center;
    font-size: 13px;
    color: var(--text-secondary);
}

.demo-credentials i {
    color: var(--color-info);
}

.login-footer {
    margin-top: 30px;
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
}

.login-features {
    flex: 1;
    background: linear-gradient(135deg, var(--whatsapp-dark-green) 0%, var(--whatsapp-teal) 100%);
    color: white;
    padding: 60px 50px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.login-features h2 {
    font-size: 28px;
    margin-bottom: 30px;
}

.login-features ul {
    list-style: none;
}

.login-features li {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 16px;
}

.login-features li i {
    font-size: 20px;
    color: var(--whatsapp-light-green);
}

/* ========================================
   APP LAYOUT
   ======================================== */

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

/* ========================================
   SIDEBAR
   ======================================== */

.sidebar {
    width: 280px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    box-shadow: 2px 0 10px rgba(0,0,0,0.05);
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header .logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-header .logo i {
    font-size: 32px;
    color: var(--whatsapp-green);
}

.sidebar-header .logo span {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

.sidebar-nav {
    flex: 1;
    padding: 10px 0;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 14px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    position: relative;
}

.nav-item i {
    font-size: 20px;
    width: 24px;
    text-align: center;
}

.nav-item span:not(.badge) {
    flex: 1;
    font-weight: 500;
}

.nav-item .badge {
    background: var(--whatsapp-green);
    color: white;
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 10px;
    font-weight: 600;
}

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

.nav-item.active {
    background: var(--whatsapp-light-green);
    color: var(--whatsapp-dark-green);
    font-weight: 600;
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--whatsapp-green);
}

.sidebar-footer {
    padding: 15px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-info {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--whatsapp-green);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.user-details {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-weight: 600;
    font-size: 14px;
    color: var(--text-primary);
}

.user-role {
    font-size: 12px;
    color: var(--text-secondary);
}

.btn-logout {
    width: 36px;
    height: 36px;
    border: none;
    background: var(--bg-primary);
    color: var(--text-secondary);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

/* ========================================
   MAIN CONTENT
   ======================================== */

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

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

.page-header h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.page-header .subtitle {
    font-size: 14px;
    color: var(--text-secondary);
}

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

.btn-icon {
    width: 40px;
    height: 40px;
    border: none;
    background: var(--bg-primary);
    color: var(--text-secondary);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.btn-icon:hover {
    background: var(--whatsapp-green);
    color: white;
}

.notification-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--color-danger);
    color: white;
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 10px;
    font-weight: 600;
}

/* ========================================
   KPI CARDS
   ======================================== */

.kpi-section {
    padding: 30px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.kpi-card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.kpi-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-5px);
}

.kpi-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: white;
}

.kpi-icon.blue { background: var(--color-blue); }
.kpi-icon.green { background: var(--color-green); }
.kpi-icon.orange { background: var(--color-orange); }
.kpi-icon.purple { background: var(--color-purple); }

.kpi-info {
    display: flex;
    flex-direction: column;
}

.kpi-label {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.kpi-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.kpi-change {
    font-size: 12px;
    font-weight: 600;
}

.kpi-change.positive {
    color: var(--color-success);
}

.kpi-change.negative {
    color: var(--color-danger);
}

.kpi-change::before {
    content: '↑ ';
}

.kpi-change.negative::before {
    content: '↓ ';
}

/* ========================================
   CHARTS SECTION
   ======================================== */

.charts-section {
    padding: 0 30px 30px;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
    overflow-y: auto;
}

.chart-card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: var(--shadow-sm);
}

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

.chart-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.chart-filter {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
}

/* ========================================
   ACTIVITY SECTION
   ======================================== */

.activity-section {
    padding: 0 30px 30px;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
}

.activity-card,
.quick-stats-card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: var(--shadow-sm);
}

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

.card-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.view-all {
    color: var(--whatsapp-green);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
}

.view-all:hover {
    text-decoration: underline;
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px;
    background: var(--bg-primary);
    border-radius: 8px;
}

.activity-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: white;
}

.activity-icon.green { background: var(--color-green); }
.activity-icon.blue { background: var(--color-blue); }
.activity-icon.orange { background: var(--color-orange); }

.activity-content p {
    font-size: 14px;
    color: var(--text-primary);
    margin-bottom: 3px;
}

.activity-time {
    font-size: 12px;
    color: var(--text-secondary);
}

.quick-stats {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.stat-label {
    font-size: 13px;
    color: var(--text-secondary);
}

.stat-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 1200px) {
    .charts-section {
        grid-template-columns: 1fr;
    }
    
    .activity-section {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .login-container {
        flex-direction: column;
    }
    
    .login-features {
        padding: 40px 30px;
    }
    
    .sidebar {
        width: 70px;
    }
    
    .sidebar-header .logo span,
    .nav-item span,
    .user-details {
        display: none;
    }
    
    .kpi-section {
        grid-template-columns: 1fr;
    }
}