/* Dark Theme Premium UI */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0a0e27;
    --bg-secondary: #141b2d;
    --bg-card: #1a2332;
    --bg-input: #252d3d;
    --text-primary: #e4e6eb;
    --text-secondary: #b0b3b8;
    --accent: #5865f2;
    --accent-hover: #4752c4;
    --success: #00d4aa;
    --error: #f04747;
    --warning: #faa61a;
    --border: #2f3646;
    --shadow: rgba(0, 0, 0, 0.3);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 500px;
}

.card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 20px 60px var(--shadow);
    border: 1px solid var(--border);
}

.header {
    text-align: center;
    margin-bottom: 30px;
}

.header h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--success) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 14px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
}

.input, select.input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 15px;
    transition: all 0.3s ease;
}

.input:focus, select.input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(88, 101, 242, 0.1);
}

.btn {
    width: 100%;
    padding: 14px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background: var(--accent);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(88, 101, 242, 0.3);
}

.btn-secondary {
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-secondary);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.step {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.status-container {
    text-align: center;
    padding: 20px 0;
}

.loader {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    border: 4px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

#statusText {
    font-size: 20px;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.countdown {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

#countdownText {
    color: var(--accent);
    font-weight: 700;
    font-size: 24px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-input);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 20px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent) 0%, var(--success) 100%);
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 4px;
}

.success-container, .error-container {
    text-align: center;
    padding: 20px 0;
}

.success-icon, .error-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.success-container h2 {
    color: var(--success);
    margin-bottom: 30px;
}

.error-container h2 {
    color: var(--error);
    margin-bottom: 20px;
}

.code-display {
    background: var(--bg-input);
    border: 2px solid var(--success);
    border-radius: 12px;
    padding: 24px;
    margin: 30px 0;
}

#codeText {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: 4px;
    color: var(--success);
    font-family: 'Courier New', monospace;
}

#errorMessage {
    color: var(--text-secondary);
    margin-bottom: 30px;
}

@media (max-width: 600px) {
    .card {
        padding: 30px 20px;
    }
    
    .header h1 {
        font-size: 24px;
    }
    
    #codeText {
        font-size: 24px;
        letter-spacing: 2px;
    }
}