* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    color: #333;
}

.container {
    width: 100%;
    max-width: 800px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

header {
    background: linear-gradient(to right, #4b6cb7, #182848);
    color: white;
    text-align: center;
    padding: 30px 20px;
    position: relative;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

header p {
    font-size: 1.1rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto 20px auto;
}

.nav-links {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 20px;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.nav-link.active {
    background: rgba(255, 255, 255, 0.9);
    color: #2d3748;
    border-color: rgba(255, 255, 255, 0.3);
}

.nav-link i {
    font-size: 1.1rem;
}

.tabs {
    display: flex;
    background: #f0f4f8;
    border-bottom: 1px solid #e0e6ed;
}

.tab {
    flex: 1;
    padding: 20px;
    text-align: center;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    color: #4a5568;
    position: relative;
}

.tab.active {
    color: #2b6cb0;
    background: white;
}

.tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: #4299e1;
    border-radius: 4px 4px 0 0;
}

.tab i {
    margin-right: 8px;
    font-size: 1.2rem;
}

.tab-content {
    padding: 40px;
}

.form-container {
    display: none;
    animation: fadeIn 0.5s ease;
}

.form-container.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: #2d3748;
    font-size: 1.1rem;
}

input {
    width: 100%;
    padding: 16px 20px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

input:focus {
    border-color: #4299e1;
    box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.2);
    outline: none;
}

.error-message {
    color: #e53e3e;
    font-size: 0.95rem;
    margin-top: 8px;
    display: none;
}

.submit-btn {
    background: linear-gradient(to right, #4299e1, #3182ce);
    color: white;
    border: none;
    padding: 16px 30px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 12px;
    cursor: pointer;
    width: 100%;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.submit-btn:hover {
    background: linear-gradient(to right, #3182ce, #2b6cb0);
    transform: translateY(-2px);
    box-shadow: 0 7px 14px rgba(66, 153, 225, 0.3);
}

.submit-btn:active {
    transform: translateY(0);
}

.submit-btn i {
    font-size: 1.2rem;
}

.result-container {
    margin-top: 30px;
    padding: 25px;
    border-radius: 12px;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    display: none;
}

.result-title {
    font-weight: 600;
    margin-bottom: 15px;
    color: #2d3748;
    display: flex;
    align-items: center;
    gap: 10px;
}

.result-content {
    font-size: 1.1rem;
    line-height: 1.6;
    color: #4a5568;
}

.loading {
    display: none;
    text-align: center;
    padding: 20px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(66, 153, 225, 0.2);
    border-radius: 50%;
    border-top-color: #4299e1;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@media (max-width: 600px) {
    .container {
        border-radius: 15px;
    }

    .tab-content {
        padding: 25px;
    }

    header h1 {
        font-size: 2rem;
    }

    .tab {
        padding: 15px;
        font-size: 1rem;
    }
}