:root {
    --primary-color: #4361ee;
    --secondary-color: #3f37c9;
    --accent-color: #4895ef;
    --light-color: #f8f9fa;
    --dark-color: #212529;
}

body {
    /*background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);*/
    min-height: 100vh;
    /*padding: 20px 0;*/
    /*font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;*/
}

.header {
    text-align: center;
    margin-bottom: 40px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.card {
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: none;
    margin-bottom: 30px;
    transition: transform 0.3s ease;
}

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

.card-header {
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 15px 15px 0 0 !important;
    padding: 15px 20px;
    font-weight: 600;
    font-size: 1.2rem;
}

.card-body {
    padding: 25px;
}

.form-control, .form-control:focus {
    border-radius: 10px;
    border: 2px solid #e1e5ee;
    padding: 12px 15px;
    box-shadow: none;
}

.form-control:focus {
    border-color: var(--accent-color);
}

.btn-primary {
    background: var(--primary-color);
    border: none;
    border-radius: 10px;
    padding: 10px 20px;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-primary:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

.btn-outline-secondary {
    border-radius: 10px;
    padding: 10px 15px;
}

.result-container {
    position: relative;
    margin-top: 20px;
}

.copy-btn {
    position: absolute;
    right: 10px;
    top: 10px;
    z-index: 10;
}

.example {
    font-size: 0.85rem;
    color: #6c757d;
    margin-top: 5px;
}

.error-msg {
    color: #dc3545;
    font-size: 0.85rem;
    margin-top: 5px;
    display: none;
}

.footer {
    text-align: center;
    margin-top: 40px;
    color: #6c757d;
    font-size: 0.9rem;
}

.feature-icon {
    background: var(--accent-color);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: white;
    font-size: 1.5rem;
}

.instructions {
    background: white;
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
}

.instructions h3 {
    color: var(--primary-color);
    margin-bottom: 20px;
}

.step {
    display: flex;
    margin-bottom: 15px;
    align-items: flex-start;
}

.step-number {
    background: var(--primary-color);
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    flex-shrink: 0;
}

.feature-box {
    text-align: center;
    padding: 20px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    height: 100%;
}

.feature-box h4 {
    color: var(--primary-color);
    margin-bottom: 15px;
}

.tool-title {
    color: var(--primary-color);
    position: relative;
    display: inline-block;
    margin-bottom: 20px;
}

.tool-title::after {
    content: "";
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--accent-color);
    border-radius: 2px;
}