:root {
    --primary-color: #2563eb;
    --secondary-color: #f59e0b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --dark-color: #1f2937;
    --light-color: #f3f4f6;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #374151;
}

/* Hero Section */
.bg-gradient-primary {
    background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
}

.hero {
    position: relative;
    overflow: hidden;
}

.hero-illustration {
    position: relative;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

.floating-badge {
    position: absolute;
    animation: pulse 2s ease-in-out infinite;
}

.badge-1 {
    top: 20%;
    right: 10%;
}

.badge-2 {
    bottom: 20%;
    left: 10%;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

/* Feature Icons */
.feature-icon {
    transition: transform 0.3s ease;
}

.feature-icon:hover {
    transform: translateY(-10px);
}

/* Cards */
.card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15) !important;
}

/* Buttons */
.btn {
    font-weight: 500;
    padding: 0.5rem 1.5rem;
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-lg {
    font-size: 1.1rem;
    padding: 0.75rem 2rem;
}

/* Navbar */
.navbar {
    transition: box-shadow 0.3s ease;
}

.navbar.scrolled {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* Progress bars */
.progress {
    border-radius: 10px;
    overflow: hidden;
}

.progress-bar {
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Dashboard Specific Styles */
.dashboard-header {
    background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
    color: white;
    padding: 2rem 0;
}

.stat-card {
    border-left: 4px solid var(--primary-color);
    transition: all 0.3s ease;
}

.stat-card:hover {
    border-left-width: 6px;
}

.level-badge {
    font-size: 2rem;
    padding: 1rem 2rem;
    border-radius: 50px;
}

.cefr-chart {
    max-height: 300px;
}

/* Call history */
.call-item {
    border-left: 3px solid var(--primary-color);
    transition: all 0.2s ease;
}

.call-item:hover {
    background-color: var(--light-color);
    border-left-width: 5px;
}

/* Loading spinner */
.spinner-border-sm {
    width: 1rem;
    height: 1rem;
}

/* Alerts */
.alert {
    border-radius: 10px;
    border: none;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .hero {
        text-align: center;
    }

    .display-4 {
        font-size: 2rem;
    }

    .lead {
        font-size: 1rem;
    }

    .floating-badge {
        display: none;
    }
}

/* Print styles for reports */
@media print {
    .navbar,
    .btn,
    .no-print {
        display: none !important;
    }

    .card {
        break-inside: avoid;
        box-shadow: none !important;
        border: 1px solid #ddd;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease-out;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}