/* BlueTick Nexus Master Styles */
:root {
    --primary-color: #075E54;    /* WhatsApp Dark Green */
    --secondary-color: #25D366;  /* WhatsApp Light Green */
    --accent-color: #34B7F1;     /* Sky Blue */
    --bg-light: #f4f7f6;
    --text-dark: #128C7E;
    --white: #ffffff;
    --shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-light);
    color: #333;
    overflow-x: hidden;
}

/* Sidebar Navigation */
.sidebar {
    width: 260px;
    height: 100vh;
    background: var(--primary-color);
    position: fixed;
    left: 0;
    top: 0;
    padding-top: 20px;
    transition: all 0.3s;
    z-index: 1000;
}

.sidebar .nav-link {
    color: rgba(255,255,255,0.7);
    padding: 12px 25px;
    margin: 4px 15px;
    border-radius: 8px;
    font-weight: 500;
    display: flex;
    align-items: center;
    transition: 0.2s;
}

.sidebar .nav-link:hover, .sidebar .nav-link.active {
    background: rgba(255,255,255,0.1);
    color: var(--white);
}

.sidebar .nav-link i {
    margin-right: 12px;
    font-size: 1.1rem;
}

/* Main Content Area */
.main-content {
    margin-left: 260px;
    padding: 40px;
    min-height: 100vh;
}

/* Premium Cards */
.card {
    background: var(--white);
    border: none;
    border-radius: 16px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
    margin-bottom: 24px;
}

.card:hover {
    transform: translateY(-5px);
}

.card-header {
    background: transparent;
    border-bottom: 1px solid #f0f0f0;
    padding: 20px;
    font-weight: 700;
    color: var(--primary-color);
}

/* Custom Progress Bar */
.progress {
    height: 12px;
    border-radius: 10px;
    background-color: #e9ecef;
}

.progress-bar {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
}

/* Status Badges */
.badge-sent { background: var(--accent-color); color: white; }
.badge-delivered { background: #5fcc83; color: white; }
.badge-read { background: #34b7f1; color: white; } /* The Blue Tick color */

/* Buttons */
.btn-primary {
    background-color: var(--primary-color);
    border: none;
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600;
}

.btn-primary:hover {
    background-color: #054a42;
}

/* Responsive */
@media (max-width: 992px) {
    .sidebar { margin-left: -260px; }
    .main-content { margin-left: 0; }
    .sidebar.active { margin-left: 0; }
}