:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --bg-dark: #0f172a;
    --text-light: #f8fafc;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
    background: radial-gradient(circle at top left, #1e293b, #0f172a);
    color: var(--text-light);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    width: 100%;
    max-width: 600px;
    padding: 20px;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    padding: 40px;
    text-align: center;
    animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

h1 {
    font-weight: 700;
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #818cf8, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: #94a3b8;
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #cbd5e1;
}

.file-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 30px;
    background: rgba(255, 255, 255, 0.03);
    border: 2px dashed var(--glass-border);
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.file-label:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--primary);
}

.file-label input {
    display: none;
}

.icon {
    font-size: 2rem;
    margin-bottom: 10px;
}

.file-name {
    margin-top: 10px;
    font-size: 0.9rem;
    color: var(--primary);
    text-align: center;
}

.premium-select {
    width: 100%;
    padding: 12px;
    background: #1e293b;
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: white;
    font-size: 1rem;
    outline: none;
}

.premium-button {
    width: 100%;
    padding: 16px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.premium-button:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.language-switcher {
    margin-top: 30px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    padding-top: 20px;
    border-top: 1px solid var(--glass-border);
}

.lang-link {
    text-decoration: none;
    color: #94a3b8;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 6px;
    transition: all 0.2s;
}

.lang-link:hover, .lang-link.active {
    color: white;
    background: rgba(255, 255, 255, 0.1);
}

.success-icon {
    font-size: 4rem;
    margin-bottom: 20px;
}

.download-button {
    background: #10b981;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

.download-button:hover {
    background: #059669;
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5);
}

.back-link {
    display: inline-block;
    margin-top: 20px;
    color: #94a3b8;
    text-decoration: none;
    font-size: 0.9rem;
}

.back-link:hover {
    color: white;
}