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

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #fdfbfb 0%, #ebedee 100%);
    height: 100vh;
    width: 100vw;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: #333;
}

.card {
    background: #ffffff;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    width: 100%;
    max-width: 450px;
    text-align: center;
    transform: translateY(-20px);
}

h1 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #111;
}

.subtitle {
    font-size: 0.9rem;
    color: #777;
    margin-bottom: 2rem;
}

#downloadForm {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

input[type="url"] {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 1rem;
    font-family: inherit;
    outline: none;
    transition: all 0.3s ease;
}

input[type="url"]:focus {
    border-color: #000;
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.05);
}

.toggle-container {
    display: flex;
    background: #f4f4f4;
    border-radius: 10px;
    overflow: hidden;
    padding: 5px;
}

.toggle {
    flex: 1;
    cursor: pointer;
}

.toggle input {
    display: none;
}

.toggle .btn {
    display: block;
    padding: 0.8rem;
    text-align: center;
    font-weight: 500;
    color: #666;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.toggle input:checked+.btn {
    background: #fff;
    color: #111;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

#submitBtn {
    background: #111;
    color: white;
    border: none;
    padding: 1rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background 0.3s ease, transform 0.1s ease;
    height: 54px;
}

#submitBtn:hover {
    background: #333;
}

#submitBtn:active {
    transform: scale(0.98);
}

#submitBtn:disabled {
    background: #999;
    cursor: not-allowed;
    transform: none;
}

.loader {
    width: 22px;
    height: 22px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-bottom-color: white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    100% {
        transform: rotate(360deg);
    }
}

.hidden {
    display: none !important;
}

#resultArea {
    margin-top: 1.5rem;
    padding: 1.2rem;
    background: #f8f9fa;
    border-radius: 10px;
    border: 1px solid #e9ecef;
}

#resultText {
    font-size: 0.9rem;
    margin-bottom: 1rem;
    color: #333;
    font-weight: 500;
}

.download-btn {
    display: block;
    background: #28a745;
    color: white;
    text-decoration: none;
    padding: 0.8rem;
    border-radius: 8px;
    font-weight: 600;
    transition: background 0.3s ease;
}

.download-btn:hover {
    background: #218838;
}

footer {
    position: absolute;
    bottom: 2rem;
    text-align: center;
    font-size: 0.85rem;
    color: #666;
    width: 100%;
}

footer p {
    margin-bottom: 0.2rem;
}

footer a {
    color: #111;
    text-decoration: none;
    font-weight: 500;
}

footer a:hover {
    text-decoration: underline;
}