/* Crypto Dark Design - Registration Form (Simplified) */
:root {
    --primary: hsl(150, 100%, 45%);      /* Neon Green */
    --secondary: hsl(190, 100%, 50%);    /* Cyan */
    --background: hsl(230, 30%, 8%);     /* Dark blue-black */
    --surface: hsl(230, 20%, 12%);       /* Lighter dark */
    --border: hsl(0, 0%, 20%);           /* Gray border */
    --text: hsl(0, 0%, 95%);
    --text-dim: hsl(0, 0%, 60%);
    --error: hsl(0, 80%, 60%);
}

.stb-trial-registration-container {
    background: var(--background);
    padding: 40px 20px;
    min-height: 100vh;
}

.stb-trial-registration-form {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 40px;
    max-width: 500px;
    width: 100%;
    margin: 0 auto;
}

.stb-registration-header {
    text-align: center;
    margin-bottom: 32px;
}

.stb-registration-header h2 {
    color: var(--text);
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.stb-registration-header p {
    color: var(--text-dim);
    font-size: 14px;
    line-height: 1.5;
}

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

.stb-form-group label {
    display: block;
    color: var(--text);
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 6px;
}

.stb-form-group input,
.stb-form-group select {
    width: 100%;
    padding: 12px 16px;
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 14px;
    transition: border-color 0.2s ease;
}

.stb-form-group input:focus,
.stb-form-group select:focus {
    outline: none;
    border-color: var(--secondary);
}

.stb-form-group input::placeholder {
    color: var(--text-dim);
    opacity: 0.5;
}

.stb-form-group select {
    cursor: pointer;
}

.stb-submit-button {
    width: 100%;
    padding: 14px;
    background: var(--primary);
    border: none;
    border-radius: 6px;
    color: #000;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(0, 255, 204, 0.3);
}

.stb-submit-button:hover {
    background: hsl(150, 100%, 50%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 255, 204, 0.4);
}

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

.stb-submit-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.stb-error-message {
    background: hsla(0, 80%, 60%, 0.1);
    border: 1px solid var(--error);
    border-radius: 6px;
    padding: 12px;
    color: var(--error);
    font-size: 13px;
    margin-bottom: 16px;
    display: none;
}

.stb-error-message.active {
    display: block;
}

.stb-success-message {
    background: hsla(150, 100%, 45%, 0.1);
    border: 1px solid var(--primary);
    border-radius: 6px;
    padding: 12px;
    color: var(--primary);
    font-size: 13px;
    margin-bottom: 16px;
    display: none;
}

.stb-success-message.active {
    display: block;
}

.stb-trial-badge {
    display: inline-block;
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 6px 16px;
    margin-bottom: 16px;
    font-size: 12px;
    color: var(--secondary);
    font-weight: 500;
}

.stb-login-link {
    text-align: center;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.stb-login-link p {
    color: var(--text-dim);
    font-size: 13px;
}

.stb-login-link a {
    color: var(--secondary);
    text-decoration: none;
    font-weight: 500;
}

.stb-login-link a:hover {
    text-decoration: underline;
}

.stb-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* Responsive */
@media (max-width: 600px) {
    .stb-trial-registration-form {
        padding: 32px 24px;
    }
    
    .stb-form-row {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .stb-registration-header h2 {
        font-size: 24px;
    }
}