:root {
    --primary: #ff0000;
    --primary-dark: #cc0000;
    --primary-light: #ff4d4d;
    --secondary: #282828;
    --light: #f9f9f9;
    --dark: #121212;
    --gray: #f0f0f0;
    --gray-dark: #e0e0e0;
    --success: #4CAF50;
    --transition: all 0.3s ease;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    --radius: 16px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

body {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: var(--light);
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    padding: 20px;
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    padding: 20px 0 30px;
    animation: fadeIn 0.8s ease-out;
}

.logo {
    color: var(--primary);
    font-size: 3.5rem;
    margin-bottom: 10px;
    text-shadow: 0 0 15px rgba(255, 0, 0, 0.3);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: linear-gradient(to right, var(--primary), var(--primary-light));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 800;
}

.subtitle {
    color: #aaa;
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 30px;
    position: relative;
    margin-bottom: 30px;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.1);
    animation: slideUp 0.6s ease-out;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

#form-container {
  position: relative; 
  display: flex; 
  justify-content: center;
  align-items: center;
}

#loading-container {
  display: none; /* Hidden by default */
  position: relative;
  width: 100%;
  height: 100%;
  z-index: 9999;

  justify-content: center;
  align-items: center;
}

.loading-image {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

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

label {
    display: block;
    margin-bottom: 12px;
    font-weight: 600;
    color: var(--gray);
    font-size: 1.1rem;
}

.input-field {
    width: 100%;
    padding: 16px 20px;
    background: rgba(0, 0, 0, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    font-size: 1rem;
    transition: var(--transition);
    color: white;
}

.input-field::placeholder {
    color: #aaa;
}

.input-field:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 4px rgba(255, 0, 0, 0.15);
    background: rgba(0, 0, 0, 0.3);
}

.radio-group {
    display: flex;
    gap: 25px;
    margin-top: 15px;
    flex-wrap: wrap;
}

.radio-option {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    padding: 12px 20px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    transition: var(--transition);
    border: 2px solid transparent;
}

.radio-option:hover {
    background: rgba(0, 0, 0, 0.3);
}

.radio-option.selected {
    background: rgba(255, 0, 0, 0.1);
    border-color: var(--primary);
}

.radio-option i {
    font-size: 1.5rem;
}

.radio-option .mp3 i {
    color: #1DB954;
}

.radio-option .mp4 i {
    color: #FF0000;
}

.radio-option input {
    display: none;
}

.btn {
    background: linear-gradient(to right, var(--primary), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 12px;
    padding: 18px 30px;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    transition: var(--transition);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 15px rgba(255, 0, 0, 0.2);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 7px 20px rgba(255, 0, 0, 0.3);
    background: linear-gradient(to right, var(--primary-light), var(--primary));
}

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

.btn:disabled {
    background: #666;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.loading-container {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 0;
    text-align: center;
    min-height: 300px;
}

.spinner {
    width: 70px;
    height: 70px;
    border: 6px solid rgba(255, 255, 255, 0.1);
    border-top: 6px solid var(--primary);
    border-radius: 50%;
    animation: spin 1.2s linear infinite;
    margin-bottom: 25px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-text {
    font-size: 1.3rem;
    color: var(--gray);
    font-weight: 500;
    margin-bottom: 15px;
}

.progress-bar {
    width: 100%;
    max-width: 400px;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 20px;
}

.progress {
    height: 100%;
    background: linear-gradient(to right, var(--primary), var(--primary-light));
    width: 0%;
    transition: width 0.4s ease;
}

.video-preview {
    display: none;
    text-align: center;
    margin-top: 25px;
    padding: 20px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
}

.video-thumbnail {
    width: 100%;
    max-width: 400px;
    border-radius: 12px;
    margin-bottom: 15px;
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.video-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.video-duration {
    color: #aaa;
    font-size: 0.9rem;
}

footer {
    margin-top: auto;
    text-align: center;
    padding: 25px 0;
    color: #777;
    font-size: 0.95rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

.footer-links a {
    color: #aaa;
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary);
}

/* Animações */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { 
        opacity: 0;
        transform: translateY(30px);
    }
    to { 
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Media Queries */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    header {
        padding: 15px 0 20px;
    }
    
    .logo {
        font-size: 2.8rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .card {
        padding: 20px;
    }
    
    .radio-group {
        gap: 12px;
    }
    
    .radio-option {
        padding: 10px 15px;
        flex: 1;
        min-width: 120px;
    }
    
    .btn {
        padding: 16px;
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.8rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .radio-group {
        flex-direction: column;
    }
    
    .radio-option {
        width: 100%;
    }
    
    .input-field {
        padding: 14px;
    }
}

/* TV Screens */
@media (min-width: 1200px) {
    body {
        font-size: 18px;
    }
    
    .container {
        max-width: 1000px;
    }
    
    .input-field {
        padding: 18px;
        font-size: 1.1rem;
    }
    
    .btn {
        padding: 20px;
        font-size: 1.3rem;
    }
}